CN109701445B - A high pressure or ultra-high pressure shielded stirred tank - Google Patents

Abstract

The invention relates to the field of shielded stirred tanks, in particular to a high-pressure or ultra-high pressure shielded stirred tank. It is composed of kettle body, agitator, shielding sleeve, motor rotor, motor stator, motor lead wire assembly, motor housing, kettle body bearing assembly, back cover, pressure balance diaphragm, and back cover bearing assembly. The invention not only overcomes the disadvantage that the shielding sleeves of the inner magnetic rotor and the outer magnetic rotor of the existing magnetic stirring kettle are thickened with the increase of the stirring medium pressure, which leads to the reduction of motor efficiency, but also overcomes the existing related matching components "high pressure and ultra-high pressure medium". "Environmentally shielded motor" sealing is unreliable, the thermal expansion and contraction of the filled inert liquid can easily lead to the damage of the pressure balance diaphragm and shielding sleeve, and the installation and connection of motor stator leads are difficult. It is not affected by thermal expansion and contraction of inert liquid, and is convenient for installation and maintenance, and has popularization and application value.

Description

High-pressure or ultrahigh-pressure shielding stirring kettle

One, the technical field

The invention relates to the field of stirred tanks, in particular to a high-pressure or ultrahigh-pressure shielding stirred tank.

Second, technical background

In order to solve the sealing problem of the stirring shaft of the stirrer and the end cover of the stirring kettle which penetrates through the stirring shaft, the stirring kettle under the conditions of high pressure and ultrahigh pressure mostly adopts magnetic transmission. The stirrer of the stirring kettle is connected with the inner magnetic rotor into a whole, the motor or a transmission shaft passing through the speed reducer is connected with the outer magnetic rotor into a whole, the inner magnetic rotor and the outer magnetic rotor are separated by utilizing the shielding sleeve, and the shielding sleeve is arranged on the end cover of the stirring kettle in a static sealing mode. The magnetic driving stirring kettle is characterized by no shaft seal structure, and the stirring medium is statically sealed with the outside, so that no leakage can be realized completely, and the magnetic driving stirring kettle is particularly suitable for stirring and mixing inflammable, explosive, strong-corrosivity, expensive, radioactive and extremely toxic media. The magnetic transmission has the defect that in order to solve the sealing problem, a process of converting mechanical energy into magnetic energy and converting the magnetic energy into the mechanical energy is added to a transmission chain, so that the transmission efficiency is reduced. In addition, the shielding sleeve in the magnetic stirring kettle is one of the core parts, and with the pressure rise of the stirring medium, the traditional method is to increase the thickness of the shielding sleeve to ensure the strength of the shielding sleeve, so that the magnetic transmission efficiency is further seriously reduced. The invention is granted by the intellectual property office of china at 8/14/2013 with the publication number CN 102101027B entitled "magnetic transmission stirring device for large chemical raw material mixing stirring kettle", and the utility model patent granted at 2015 at 8/12/CN 204544056U entitled "an improved magnetic stirring kettle", which is based on the principle, still cannot overcome the problem of low magnetic transmission efficiency under high pressure or ultra-high pressure. The invention patent, which is granted by the intellectual property office of China at 6/2010/16/2010 and has the grant publication number of CN101359849B and the name of high-pressure ultrahigh-pressure medium environment shielding motor, has the advantage that the shielding sleeve does not cause stress due to the pressure of a high-pressure or ultrahigh-pressure medium, and provides favorable conditions for the combined innovation of a high-pressure or ultrahigh-pressure shielding stirring kettle; however, the shielding sleeve and the pressure balance diaphragm are sealed by the O-shaped ring in the patent technology, and the sealing is not reliable; the shielding sleeve and the pressure balance diaphragm can not eliminate the volume expansion and shrinkage of the inert liquid caused by the difference between the filling temperature and the working temperature of the inert liquid structurally, so that the shielding sleeve and the pressure balance diaphragm are easy to damage due to thermal stress; the motor stator lead wire is difficult to connect, and is inconvenient to install and maintain, so the implementation of the technology in the combined innovative high-pressure or ultrahigh-pressure shielding stirring kettle is restricted.

Third, the invention

The invention aims to overcome the defects of the existing stirring kettle and provide a high-pressure or ultrahigh-pressure shielding stirring kettle.

The technical scheme of the invention is that the device comprises a kettle body, a stirrer, a shielding sleeve, a motor rotor, a motor stator, a motor lead component, a motor shell, a power output end bearing assembly, a rear cover, a pressure balance diaphragm and a rear cover bearing assembly.

The kettle body is a shell with end sockets at two ends thereof which are vertically upward, and is a cavity for accommodating the stirrer and forming a rotary space and an accommodating stirring medium; the upper end socket of the kettle body is provided with a through hole communicated with the inner cavity of the motor shell of the power output end of the high-pressure or ultrahigh-pressure shielding motor along the axis, the kettle opening is provided with a flange, and the flange surface is provided with a sealing surface matched with the flange at the kettle end of the motor shell, the sealing surface and the bolt hole and a threaded hole for installing the motor shell; the upper end enclosure is additionally provided with a feed inlet for stirring a medium, a thermometer interface and a pressure gauge interface, and the lower end enclosure is provided with a discharge outlet for stirring the medium.

The stirrer is a paddle stirrer formed by a hub and a blade according to the requirements of a stirring medium and a process, or a turbine stirrer or a propulsion stirrer formed by the hub and the blade, or a frame stirrer formed by the hub and an anchor or an oval frame or a conical bottom frame or a square frame or an anchor frame, or a spiral stirrer formed by the hub and a spiral belt; the hub is positioned at the shaft center of the stirrer, and the inner hole of the hub is matched with the shaft head of the motor rotor mounting stirrer.

The motor shell is a cavity body which is provided with a motor stator, a reed fixing ring, a power output end bearing assembly, a rear cover bearing assembly and a step hole matched with the rear cover in an inner cavity; a step of the bearing assembly at the fixed power output end is provided with a threaded hole matched with a bolt hole of the bearing assembly at the fixed power output end, and the edge of the step close to the inner cavity is provided with a thinning ring groove for mounting a shielding sleeve; a positioning pin blind hole matched with the positioning pin hole is formed in the step for fixing the rear cover bearing assembly; the rear cover end of the motor shell is provided with a threaded hole matched with the bolt hole of the flat cover of the rear cover, and the power output end of the motor shell is provided with a flange plate, a bolt hole and a sealing groove which are matched with the end part of the kettle body and the threaded hole of the ring surface of the kettle body; the middle position of the outer cylindrical surface of the motor shell is provided with an annular groove, a stator cooling jacket is hermetically and fixedly sleeved on the annular groove to form a stator cooling chamber, and the stator cooling jacket is an integral cylinder with the inner diameter being the same as the diameter of the outer cylindrical surface of the motor shell or a biplate semi-circular arc plate with the outer diameter being the same as the diameter of the outer cylindrical surface of the motor shell; 3 holes for installing motor lead assemblies are arranged on the wall of the motor shell at the corresponding positions of the reed fixing rings, and motor stator lead perforated sheaths are fixedly installed between the stator cooling jacket and the motor shell.

The motor stator comprises stator core and winding coil, and the motor stator shape that twines the winding has the cylinder of boss for both ends, and the barrel inner chamber of taking the winding matches with the outer cylinder face of housing, and the cooperation relation is clearance fit, and the barrel excircle of taking the winding is interference fit with the motor casing hole, and the outer cylinder towards back lid one end boss is connected with the hole fixed connection of reed retainer plate.

The 3 groups of motor lead assemblies respectively consist of a reed fixing ring, reeds, fixing screws, line pressing screws, motor leads, sealing insulating glue, an insulating sleeve and contacts; the reed fixing ring is an annular body made of insulating materials, the thickness and the inner hole of the reed fixing ring are matched with the length and the excircle of a boss at one end of the motor stator facing the rear cover, and the excircle of the reed fixing ring is matched with the inner cavity of the motor shell; the outer circle of the reed fixing ring is provided with a reed fixing groove corresponding to the mounting holes of the 3 groups of motor lead assemblies, and the bottom surface of the reed fixing groove is provided with a screw hole and a stator coil lead through hole; the reed is U-shaped, one end of the U-shaped reed is provided with a threaded hole matched with a fixing screw and a stator coil lead connecting hole, a stator coil lead is inserted into a stator coil lead through hole on the bottom surface of the reed fixing groove and is fixed on the reed through the stator coil lead connecting hole on the reed, the fixing screw penetrates through the threaded hole arranged on the reed fixing ring and is screwed into the threaded hole of the reed, the reed is fixed on the reed fixing ring, the stator coil of the motor is communicated with the reed through the stator coil lead, and the other end of the U-shaped reed is tightly attached to the contact after being installed by; the insulation sleeve is made of insulation materials, one end of the insulation sleeve is provided with a round sleeve with a baffle ring, one end of the round sleeve without the baffle ring is installed in a motor lead component installation hole from the inner cavity of the motor shell in an interference fit mode, the position of a contact is matched with the baffle ring of the insulation sleeve, one end of a motor lead penetrates through the motor lead component installation hole and the insulation sleeve and then is fixedly connected with the contact, and the other end of the motor lead is a three-phase power supply connection end; then filling sealing insulating glue to fix 3 groups of motor leads at the center of the motor lead mounting hole and fix the contact fixed with the motor leads at the position matched with the insulating sleeve baffle ring; and after the sealing insulating glue is cured, installing a line pressing screw.

The shielding sleeve is a thin-wall cylinder sleeved between the motor stator and the motor rotor, the diameter of the inner cavity of the shielding sleeve is in clearance fit with the motor rotor, and the outer diameter of the shielding sleeve is in clearance fit with the inner cavity of the motor stator; the front end and the rear end of the bearing are respectively and fixedly arranged on the power output end bearing assembly and the rear cover bearing assembly, and one end connected with the rear cover bearing assembly is provided with temperature compensation ripples.

The motor rotor is composed of a rotor shaft and a cylindrical winding wound at the middle of the rotor shaft or a cylindrical squirrel cage installed at the middle of the rotor shaft, two ends of the motor rotor are respectively provided with a journal matched with a bearing inner ring or a bearing bush of the power output end bearing assembly and a journal matched with a shaft head of the mounting stirrer and a bearing inner ring or a bearing bush of the rear cover bearing, the outer cylindrical surface of the motor rotor is matched with a cavity of the shielding sleeve, the matching relationship is clearance fit, and the diameter of the shaft head of the motor rotor provided with the stirrer is matched with the diameter of an inner hole of.

The power output end bearing assembly consists of a flange plate with a boss, a bearing body formed by arranging a bearing hole at the axle center of the boss and a bearing arranged in the bearing hole, wherein the bearing is a rolling bearing or a sliding bearing, and countersunk bolt holes arranged on a step hole in the inner cavity of the motor stator are uniformly distributed on the flange plate; and a through power output end medium balance hole is formed in the outer edge of the end face bearing hole of the bearing body along the axis.

The rear cover is a flat cover with a boss, a counter bore matched with the rear cover bearing assembly is arranged at the axial position of the end face of the boss, a groove is arranged at the center of the counter bore and is an inert liquid balance chamber, and a sealing groove is arranged on the cylindrical surface of the boss; an axial inert liquid balance hole, a radial inert liquid balance hole and a positioning pin blind hole are arranged between the boss end face inert liquid balance chamber and the edge of the boss, and an inert liquid filling hole is arranged at a position corresponding to one position of the axial inert liquid balance hole on the end face of the flat cover in a penetrating way; bolt holes are uniformly distributed on the ring surface of the flat cover and are installed on the motor shell.

The rear cover bearing assembly is a bearing body coaxially formed by a cylinder, a transition cone and a flange plate, a bearing hole is formed in the axis position of the combined bearing body, and a bearing is installed in the bearing hole and is a rolling bearing or a sliding bearing; a boss matched with the counter bore of the rear cover is arranged at one end of the flange plate, and a stirring medium balance chamber corresponding to the inert liquid balance chamber of the rear cover is arranged at the center of the boss; the edge of the boss is provided with a thinning ring groove for mounting a pressure balance diaphragm, and the pressure balance diaphragm is fixedly mounted in the thinning ring groove of the flange plate boss of the rear cover bearing assembly; the edge of the end part of the cylinder of the rear cover bearing assembly is provided with a thinning ring groove for installing a shielding sleeve, and the shielding sleeve with the temperature compensation corrugation end is fixedly installed on the thinning ring groove of the end part of the cylinder of the rear cover bearing assembly in a sealing way; the flange plate is respectively provided with a positioning pin hole and an inert liquid balance hole corresponding to the inert liquid balance hole of the rear cover, meanwhile, an inert liquid balance groove communicated with the inner cavity of the motor stator is arranged at the position of the inert liquid balance hole on the front end surface of the flange plate, and the positioning pin hole is correspondingly matched with a positioning pin blind hole on a matched rear cover boss; and a rear cover medium balance hole is arranged at the outer edge of the bearing hole on the end surface of the cylinder along the axis.

The pressure balance diaphragm is a circular diaphragm which is hermetically fixed on a stirring medium balance chamber of the back cover bearing assembly and is matched with a ring groove at the edge of the stirring medium balance chamber and provided with circular ring ripples.

The total installation process:

firstly, directly sleeving a stator cooling jacket cylinder with the same inner diameter as the outer diameter of a motor shell on an annular groove on the outer cylinder of the motor shell, or fixedly connecting a stator cooling jacket cylinder with the same outer diameter as the outer diameter of the motor shell into a cylinder after covering a double-sheet semi-circular arc plate on the annular groove on the outer cylinder of the motor shell, and then fixedly and hermetically installing the stator cooling jacket cylinder on the intersection part of the annular groove on the outer cylinder of the motor shell and the outer cylinder of the motor shell to form a stator cooling chamber; a stator cooling liquid inlet and a stator cooling liquid outlet which are communicated with the stator cooling chamber are fixedly arranged on the stator cooling sleeve, and a motor stator lead perforated sheath is fixedly arranged between the stator cooling sleeve and the motor shell.

Then, installing an insulating sleeve of the motor lead assembly into the motor lead assembly installation hole from the inner cavity of the motor shell in an interference fit manner; the motor lead wire installation structure is characterized in that the end part of a lead wire at one end of a motor lead wire is fixed with a contact, the other end of the lead wire penetrates through a motor lead wire installation hole in the inner hole of an insulation sleeve and the wall of a motor shell, the contact is moved to the position matched with a retaining ring of the insulation sleeve, then sealing insulation glue is filled, the motor lead wire is fixed at the center of the motor lead wire installation hole, the contact fixed with the motor lead wire is fixed at the position matched with the retaining ring of the insulation sleeve, and a press line screw is.

Thirdly, a stator coil lead penetrates through a reed fixing ring and a lead connecting hole on a reed, then the reed is installed on the reed fixing ring through a fixing screw, a reed on the reed fixing ring is aligned to a motor lead assembly contact installed on a motor shell along the circumferential direction, then the reed fixing ring is fixedly installed on a boss of a motor stator facing to the rear cover end, and the end part of the stator coil lead is fixedly connected with the reed; the motor stator is arranged in the inner cavity of the motor shell in an interference fit manner, and the reed on the reed fixing ring is tightly attached to the contact by virtue of the elasticity of the reed.

Fourthly, fixedly mounting a pressure balance diaphragm on a thinning ring groove of a flange plate boss of the rear cover bearing assembly, mounting a shaft neck which is arranged at one end of the motor rotor facing to the rear cover and is matched with a rolling bearing inner ring or a sliding bearing bush of the rear cover bearing assembly into the rolling bearing inner ring or the sliding bearing bush of the rear cover bearing assembly, sleeving one end of a shielding sleeve with temperature compensation corrugations into the motor rotor facing to the direction of the rear cover bearing assembly, and fixedly mounting one end of the shielding sleeve with the temperature compensation corrugations on the thinning ring groove on a cylinder of the rear cover bearing assembly; the motor rotor, the shielding sleeve, the rear cover bearing assembly and the pressure balance diaphragm which are connected together are arranged in the inner cavity of the motor stator together from the rear cover end of the motor shell, aligned with a positioning pin hole in a flange plate of the rear cover bearing assembly and a positioning pin blind hole in a step of the motor shell on which the rear cover bearing assembly is arranged, and penetrated through by a positioning pin for positioning, and an inert liquid balance groove on the front end surface of the flange plate of the rear cover bearing assembly penetrates through a gap between the inner cavity of the motor stator and the shielding sleeve; and one end of the shielding sleeve without the temperature compensation corrugation is fixedly arranged on a thinning ring groove of a step hole for installing a power output end bearing assembly in the motor shell.

Fifthly, installing a rolling bearing outer ring or a sliding bearing bush of a bearing of the power output end bearing assembly into a bearing hole of a bearing body of the power output end bearing assembly, then sleeving a rolling bearing inner ring or the sliding bearing bush of the bearing of the power output end bearing assembly on a shaft neck at the other end of the motor rotor, meanwhile, installing the power output end bearing assembly into a step hole of the power output end bearing assembly in the motor shell, fixing the power output end bearing assembly on a step in the motor shell through a bearing body fixing bolt, installing a stirrer on a stirrer installing shaft head of the motor rotor, and fixing the power output end bearing assembly through a stirrer fixing bolt.

Sixthly, after a sealing ring is installed in a sealing groove in a boss of the rear cover, the sealing ring is installed on the end face of the rear cover of the motor shell, an inert liquid balance hole of the rear cover corresponds to an inert liquid balance hole penetrating through a bearing assembly of the rear cover, a positioning pin blind hole of the rear cover is correspondingly installed on a positioning pin matched with the rear cover bearing assembly, and the rear cover is fixed on the motor shell through a rear cover bolt sleeve.

Seventhly, installing a sealing ring in a sealing groove of a flange at the kettle body end of the motor shell, installing a stirrer and a transmission shaft of a motor rotor into an inner cavity of the kettle body from the outside along a kettle opening, installing a flange at the kettle body end of the motor shell on the end part of the kettle body in a butt mode, and fixing the motor shell on the kettle body by using a kettle body bolt sleeve.

Eighth, filling inert liquid from the inert liquid filling hole on the back cover, and tightening the sealing screw after filling to finish the installation.

And finally, respectively installing a feed valve at a stirring medium feed port of the upper end socket of the kettle body or connecting the feed valve with the feed pipe, installing a thermometer at a thermometer interface and installing a pressure gauge at a pressure gauge interface, and installing a discharge valve at a stirring medium discharge port of the lower end socket or connecting the discharge valve with a discharge pipe.

The invention has the following excellent effects: the defects that the efficiency of a motor is reduced due to the fact that a shielding sleeve between an inner magnetic rotor and an outer magnetic rotor is thickened when the pressure of a stirring medium rises in the existing magnetic transmission stirring kettle are overcome, and meanwhile, the defects that the shielding sleeve and a pressure balance diaphragm of the existing related component 'high-pressure ultrahigh-pressure medium environment shielding motor' are unreliable in sealing, the shielding sleeve and the pressure balance diaphragm are easily damaged due to thermal stress, the connection of a motor stator lead is difficult and the like are overcome, so that the high-pressure or ultrahigh-pressure shielding stirring kettle is reliable in sealing, the shielding sleeve is not influenced by the expansion caused by heat and the contraction caused by cold of inert liquid, the installation and the maintenance are convenient, and the.

Description of the drawings

FIG. 1 is a cross-sectional view showing the overall structure of the present invention;

FIG. 2 is a cross-sectional view of a schematic of a power takeoff bearing assembly;

FIG. 3 is a cross-sectional view of a structural schematic of the back cover bearing assembly;

FIG. 4 is an enlarged view of a portion I of FIG. 1;

FIG. 5 is an enlarged view of a portion II of FIG. 1;

FIG. 6 is an enlarged view of a portion of III of FIG. 1;

fig. 7 is a partial enlarged view of IV in fig. 1.

Reference numerals:

1. 1-1 part of a shielding sleeve, 1-2 parts of a welding line of the shielding sleeve at the end of a rear cover, 2 parts of a welding line of the shielding sleeve at the power output end, 3 parts of a motor rotor, 3 parts of a motor stator, 3 parts-1-1 parts of a motor lead assembly, 3 parts-1-2 parts of a pressing screw, 3 parts-1-3 parts of a motor lead, 3 parts-1-4 parts of sealing insulating glue, 3 parts-1-5 parts of an insulating sleeve, 3 parts-1-6 parts of a contact, 3 parts-1-7 parts of a reed, 3 parts-1-8 parts of a fixing screw, 3 parts-2 parts of a reed fixing ring, 3 parts-3 parts of a stator coil, 4 parts of a stator coil lead, 4 parts-1 part of a motor shell, The device comprises a lead tapping sheath 5, a power output end bearing assembly 5-1, a bearing body 5-2, a bearing 5-3, a power output end medium balance hole 5-4, a countersunk bolt hole 5-5, a bearing body fixing bolt 6, a kettle body 6-1, a sealing ring 6-2, a kettle body bolt suite 6-3, a kettle mouth 6-4, a feed inlet 6-5, a thermometer interface 6-6, a pressure gauge interface 6-7, a discharge outlet 7, a stirrer 7-1, a stirrer fixing bolt 8, a rear cover 8-1, an inert liquid filling hole 8-2, a sealing screw 8-3, a sealing ring 8-4, a rear cover bolt suite 8-5, an inert liquid balance chamber 8-6, an axial inert liquid balance hole 8-7, a pressure gauge, the device comprises a radial inert liquid balance hole 9, a pressure balance diaphragm 9-1, a pressure balance diaphragm weld joint 10, a rear cover bearing assembly 10-1, a rear cover bearing body 10-2, a stirring medium balance chamber 10-3, an inert liquid balance hole 10-4, a rear cover medium balance hole 10-5, a bearing 10-6, an inert liquid balance groove 10-7, a positioning pin hole 10-8 and a positioning pin.

Fifth, detailed description of the invention

Embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in figure 1, the technical scheme of the invention is that the device comprises a kettle body 6, a stirrer 7, a shielding sleeve 1, a motor rotor 2, a motor stator 3, a motor lead component 3-1, a motor shell 4, a power output end bearing assembly 5, a rear cover 8, a pressure balance diaphragm 9 and a rear cover bearing assembly 10.

The kettle body 6 is a shell with end sockets at two ends thereof which are vertically upward, is a cavity for accommodating a stirrer and forming a rotary space and accommodating a stirring medium, and is made of S30408 stainless steel material; the upper end socket of the kettle body 6 is provided with a through hole which is communicated with the inner cavity of the motor shell 4 of the power output end of the high-pressure or ultrahigh-pressure shielding motor along the axis and is a kettle opening 6-3, the kettle opening 6-3 is provided with a flange, and the flange surface is provided with a sealing surface and a threaded hole for installing the motor shell, wherein the sealing surface and the threaded hole are matched with the kettle end flange, the sealing surface and the bolt hole of the motor shell; the upper end enclosure is additionally provided with a feed inlet 6-4 for stirring medium, a thermometer interface 6-5 and a pressure gauge interface 6-6, and the lower end enclosure is provided with a discharge outlet 6-7 for stirring medium.

The stirrer 7 is a paddle stirrer formed by a hub and a blade, or a turbine stirrer or a propelling stirrer formed by the hub and a blade, or a frame stirrer formed by the hub and an anchor or an elliptical frame or a conical bottom frame or a square frame or an anchor frame, or a spiral stirrer formed by the hub and a spiral belt according to the requirements of a stirring medium and a process; selecting an S30408 material; the hub is positioned at the shaft center of the stirrer, and the inner hole of the hub is matched with the shaft head of the stirrer 7 arranged on the motor rotor 2.

The motor shell 4 is a cavity body which is provided with a motor stator 3, reed fixing rings 3-1-8, a power output end bearing assembly 5, a rear cover 8 and a rear cover bearing assembly 10 which are matched with step holes in an inner cavity by selecting a 20Mn forged piece; 4 threaded holes matched with the countersunk bolt holes 5-4 of the power output end bearing assembly 5 are arranged on the step for fixing the power output end bearing assembly 5, and a thinning ring groove for mounting the shielding sleeve 1 is arranged at the edge of the step close to the inner cavity; a positioning pin blind hole matched with a positioning pin hole 10-7 of the rear cover bearing assembly 10 is arranged on a step for fixing the rear cover bearing assembly 10; an inner hole and a threaded hole which are matched with the flat cover of the rear cover 8 are formed in the rear cover end of the motor shell 4, a flange plate, a threaded hole and a sealing surface which are matched with the end flange of the kettle body 6 are formed in the kettle body end of the motor shell 4, and the sealing surface is of a sealing groove structure; an annular groove is arranged in the middle of the outer cylindrical surface of the motor shell 4, and forms a stator cooling chamber together with a stator cooling jacket 4-1 which is sleeved on the annular groove and has the same inner diameter as the outer cylindrical surface of the motor shell, or forms a stator cooling chamber together with a stator cooling jacket 4-1 biplate arc plate which is coated on the annular groove and fixedly connected into a whole and has the same outer diameter as the outer cylindrical surface of the motor shell; 3 holes for installing the motor lead component 3-1 are arranged on the wall of the motor shell 4 at the corresponding position of the reed fixing ring 3-1-8; a motor stator lead perforated sheath 4-4 is fixedly arranged between the stator cooling jacket 4-1 and the motor shell 4.

The motor stator 3 is composed of a stator core and a winding coil, the stator core is formed by laminating silicon steel sheets, the winding is formed by winding red copper enameled wires, the shape of the motor stator wound with the winding is a cylinder body with bosses at two ends, the inner cavity of the cylinder body with the winding is matched with the outer cylindrical surface of the shielding sleeve 1, the matching relationship is clearance fit, and the outer circle of the cylinder body with the winding is in interference fit with the inner hole of the motor shell; the outer cylinder facing the boss at the end of the rear cover is fixedly connected with the inner hole of the reed fixing ring 3-1-8 through adhesive.

As shown in fig. 4, 3 groups of motor lead assemblies 3-1 are respectively composed of a reed fixing ring 3-1-8, reeds 3-1-6, fixing screws 3-1-7, line pressing screws 3-1-1, motor leads 3-1-2, sealing insulating glue 3-1-3, an insulating sleeve 3-1-4 and contacts 3-1-5; the reed fixing ring 3-1-8 is an annular body made of phenolic resin, the thickness and the inner hole of the reed fixing ring 3-1-8 are matched with the length and the excircle of a boss at one end of the motor stator 3 facing the rear cover, and the excircle of the reed fixing ring is matched with the inner cavity of the motor shell 4; 3 cuboid reed fixing grooves corresponding to the 3 groups of motor lead component mounting holes on the motor shell 4 are arranged on the outer circles of the reed fixing rings 3-1-8, and screw holes and stator coil lead through holes are formed in the bottom surfaces of the reed fixing grooves; the reed 3-1-6 is U-shaped and made of phosphor bronze sheet, one end of the U-shaped reed 3-1-6 is provided with a threaded hole matched with the fixing screw 3-1-7 and a stator coil lead 3-3 connecting hole, 3 stator coil leads 3-3 are sequentially inserted into a stator coil lead through hole on the bottom surface of the reed fixing groove and a stator coil lead connecting hole on the reed 3-1-6, the end part is fixed on the reed 3-1-6 by soldering and welding, the fixing screw 3-1-7 penetrates through a screw hole arranged on the bottom surface of the reed fixing groove 3-1-8 and is screwed into the threaded hole of the reed 3-1-6, the reed 3-1-6 is fixed on the reed fixing ring 3-1-8, the stator coil lead 3-3 communicates the stator coil 3-2 with the reed 3-1-6, the other end of the U-shaped reed 3-1-6 is tightly attached to the contact 3-1-5 after being installed by means of the elasticity of the reed 3-1-6, so that stable conduction current can be ensured; the insulation sleeve 3-1-4 is made of phenolic resin and provided with a baffle ring at one end, the end without the baffle ring of the insulation sleeve is arranged in a motor lead component mounting hole from the inner cavity of the motor shell 4 in an interference fit manner, the position of the movable contact 3-1-5 is matched with the baffle ring of the insulation sleeve 3-1-4, one end of the motor lead 3-1-2 penetrates through the motor lead component mounting hole and the inner hole of the insulation sleeve 3-1-4 to be soldered and fixed with the contact 3-1-5, and the other end is a three-phase power supply connection end; then filling sealing insulating glue 3-1-3 to fix the motor lead 3-1-2 at the center of the motor lead mounting hole and fix the contact 3-1-5 fixed with the motor lead 3-1-2 at the position matched with the baffle ring of the insulating sleeve 3-1-4; the sealing insulating glue 3-1-3 is epoxy resin glue, and after the sealing insulating glue 3-1-3 is cured, a line pressing screw 3-1-1 is installed; the machine lead assembly 3-1 can not only ensure stable transmission current, but also ensure insulation with a motor shell to prevent short circuit.

As shown in fig. 1, 5 and 7, the shielding sleeve 1 is a thin-walled cylinder sleeved between the motor stator 3 and the motor rotor 2, and is made of an S31603 stainless steel sheet with a thickness of 0.15 or 0.2mm, the diameter of the inner cavity of the shielding sleeve is in clearance fit with the motor rotor 2, the outer diameter of the shielding sleeve is in clearance fit with the inner cavity of the motor stator 3, and magnetic transmission is ensured to the maximum extent under the condition that installation and movement are not restricted; the front end and the rear end of the motor shell are respectively arranged on a thinning ring groove of a mounting hole of a power output end bearing assembly 5 on the motor shell 4 and a thinning ring groove of a rear cover bearing assembly 10 through argon arc welding, and a complete annular welding line, the shielding sleeve 1 and the pressure balance diaphragm 9 together isolate the inner cavities of the motor rotor 2 and the motor stator 3 and also isolate inert liquid and a stirring medium; one end connected with the rear cover bearing assembly 10 is provided with temperature compensation section ripples to offset the temperature difference stress caused by the expansion with heat and contraction with cold due to the temperature change of the shielding sleeve 1.

The motor rotor 2 is composed of a rotor shaft and a columnar winding wound at the middle part of the rotor shaft or a columnar squirrel cage installed at the middle part of the rotor shaft, the rotor shaft is made of S30408, two ends of the rotor shaft are respectively provided with a shaft neck matched with an inner ring or a bearing bush of a bearing 5-2 of a power output end bearing assembly 5 and a shaft head for installing a stirrer 7 and a shaft neck matched with an inner ring or a bearing bush of a bearing 10-5 of a rear cover bearing assembly 10, the outer cylindrical surface of the middle part of the motor rotor 2 is matched with a cavity of the shielding sleeve 1, the matching relationship is clearance fit, and the diameter of the shaft head of the motor rotor 2 for installing; the motor rotor 2 is coated with a corrosion resistant coating.

As shown in fig. 2, the power output end bearing assembly 5 is composed of a flange plate with a boss, a bearing body formed by arranging a bearing hole at the axle center of the boss and a bearing 5-2 arranged in the bearing hole, wherein the bearing 5-2 is a rolling bearing or a sliding bearing made of corrosion-resistant alloy, and the bearing body is made of S30408 stainless steel forgings; if the bearing 5-2 is a rolling bearing, an outer ring of the rolling bearing is embedded into a bearing hole in an interference fit manner and is fixedly installed; if the bearing 5-2 is a sliding bearing, the sliding bearing bush is embedded into the bearing hole in an interference fit manner and is fixedly installed; 4 countersunk bolt holes 5-4 which are uniformly arranged on the stepped hole of the inner cavity of the motor stator are uniformly distributed on the flange plate; and 4 through power output end medium balance holes 5-3 are arranged on the outer edge of the end face bearing hole of the bearing body 5-1 along the axis.

The rear cover 8 is a flat cover with a boss, a 20Mn forging is selected, a counter bore matched with the rear cover bearing assembly 10 is arranged at the axial position of the end face of the boss, a groove is arranged at the center of the counter bore and is an inert liquid balance chamber 8-5, the size of the inert liquid balance chamber 8-5 is required to meet the shrinkage caused by cold shrinkage when the temperature of the inert liquid is lower than the charging temperature, and 2 sealing grooves are arranged on the cylindrical surface of the boss; 4 pairs of axial inert liquid balance holes 8-6, radial inert liquid balance holes 8-7 and 2 positioning pin blind holes are arranged between the boss end face inert liquid balance chamber and the boss edge, and 1 inert liquid filling hole 8-1 is arranged at a position corresponding to one of the axial inert liquid balance holes 8-6 on the end face of the flat cover in a penetrating manner; 6 bolt holes are uniformly distributed on the flat cover and are installed on the motor shell 4.

As shown in fig. 3, the rear cover bearing assembly 10 is a rear cover bearing body 10-1 coaxially formed by a cylinder, a transition cone and a flange, a bearing hole is arranged at the axial center position of the rear cover bearing body 10-1, a bearing 10-5 is installed in the bearing hole, and the bearing 10-5 is a rolling bearing or a sliding bearing; the material is corrosion-resistant alloy, and the bearing body material is S30408 stainless steel forging; if the bearing 10-5 adopts a rolling bearing, an outer ring of the rolling bearing is embedded into a bearing hole in an interference fit manner and is fixedly installed; if the bearing 10-5 is a sliding bearing, the sliding bearing bush is embedded into the bearing hole in an interference fit manner and is fixedly installed; a boss matched with the counter bore of the rear cover is arranged at one end of the flange plate, a stirring medium balance chamber 10-2 is arranged at the center of the boss, and the size of the stirring medium balance chamber 10-2 is required to meet the expansion amount of thermal expansion when the temperature of the inert liquid is higher than the charging temperature; the edge of the boss is provided with a thinning ring groove for installing a pressure balance diaphragm 9 so as to weld the edge of the pressure balance diaphragm 9 on the edge of the stirring medium balance chamber 10-2, and a welding seam has the functions of fixing and sealing at the same time and separates the stirring medium on two sides of the pressure balance diaphragm 9 from inert liquid; the edge of the end part of the cylinder of the rear cover bearing assembly 10 is provided with a thinning ring groove welded with the shielding sleeve 1, so that the edge of one end of the shielding sleeve 1 with temperature compensation ripples is welded on the side surface of the cylinder of the rear cover bearing assembly 10, and a welding seam has the functions of fixing and sealing at the same time, so as to isolate a stirring medium surrounding a motor rotor from an inert liquid in an inner cavity of a motor stator; 2 positioning pin holes 10-7 and 4 inert liquid balance holes 10-3 matched with the axial inert liquid balance holes 8-6 of the rear cover are respectively arranged on the flange plate, and meanwhile, an inert liquid balance groove 10-6 communicated with the inner cavity of the motor stator is arranged at the position of the inert liquid balance hole 10-3 on the front end surface of the flange plate, so that the inert liquid can rapidly flow in a gap between an inert liquid balance chamber and the inner cavity of the motor stator 3 and the shielding sleeve 1 according to pressure change, and the pressure is balanced; the positioning pin hole 10-7 on the flange plate is correspondingly matched with a blind hole of a positioning pin on a boss of the rear cover 8; 4 rear cover medium balance holes 10-4 are arranged on the outer edge of the bearing hole on the end face of the cylinder along the axis.

As shown in fig. 1 and 6, the pressure balance diaphragm 9 is a circular diaphragm with circular corrugation matched with the edge ring groove of the stirring medium balance chamber 10-2, and is made of an S31603 stainless steel sheet with the thickness of 0.15 or 0.2 mm; the edge of the pressure balance diaphragm 9 is welded and fixed on the edge thinning ring groove of the stirring medium balance chamber 10-2 through argon arc welding, the pressure balance diaphragm 9 and a complete annular welding line are together separated from the inner cavities of the motor rotor 2 and the motor stator 3 by the shielding sleeve 1, and inert liquid and stirring medium are also separated; the circular ripples on the pressure balance diaphragm 9 balance pressure changes of the stirring medium and the inert liquid on two sides of the pressure balance diaphragm 9 through deformation of the circular ripples, and simultaneously the maximum shape of the front and back of the circular ripples on the pressure balance diaphragm 9 meets the deformation caused by thermal expansion and cold contraction when the temperature of the inert liquid is higher or lower than the charging temperature of the inert liquid.

The stator cooling jacket 4-1 is made of Q345R material and is a cylinder with the inner diameter the same as the diameter of the outer cylindrical surface of the motor shell or a biplate semicircular arc plate with the outer diameter the same as the diameter of the outer cylindrical surface of the motor shell.

The total installation process:

firstly, directly sleeving a stator cooling jacket 4-1 cylinder with the same inner diameter as the outer diameter of a motor shell 4 on an annular groove on the outer cylinder of the motor shell 4, or coating a stator cooling jacket 4-1 double-piece semi-circular-arc plate with the same outer diameter as the outer diameter of the motor shell 4 on the annular groove on the outer cylinder of the motor shell 4 and then fixedly connecting the stator cooling jacket 4-1 cylinder with the annular groove on the outer cylinder of the motor shell 4 through welding to form a cylinder, and then fixedly installing the stator cooling jacket 4-1 cylinder on the intersection part of the annular groove on the outer cylinder of the motor shell 4 and the; a stator cooling liquid inlet 4-3 and a stator cooling liquid outlet 4-2 which are communicated with a stator cooling chamber and a motor stator lead perforated sheath 4-5 are welded and installed on the stator cooling jacket 4-1.

Then, an insulating sleeve 3-1-4 of 3 groups of motor lead components 3-1 is installed into a motor lead component installation hole from the inner cavity side of a motor shell 4 in an interference fit mode, the end part of a lead at one end of a motor lead 3-1-2 is soldered on a contact 3-1-5, the other end of the lead passes through an inner hole of the insulating sleeve 3-1-4 and a motor lead installation hole on the wall of the motor shell 4, the contact 3-1-5 is moved to a position matched with the position of a retaining ring of the insulating sleeve 3-1-4, sealing insulating glue 3-1-3 is filled, the motor lead 3-1-2 is fixed at the central position of the motor lead installation hole, the contact 3-1-5 fixedly connected with the motor lead 3-1-2 is fixed at a position matched with the retaining ring of the insulating sleeve 3-1-4, therefore, the motor lead 3-1-2 and the motor shell 4 are isolated in an insulating mode, and after the glue is solidified, the line pressing screw 3-1-1 is installed.

Thirdly, a stator coil lead 3-3 penetrates through a lead connecting hole on a reed fixing ring 3-1-8 and a reed 3-1-6, then the reed 3-1-6 is installed on the reed fixing ring 3-1-8 through a fixing screw 3-1-7, a reed on the reed fixing ring 3-1-8 is aligned to a motor lead component 3-1 contact 3-1-5 installed on a motor shell 4 along the axial direction, then the reed fixing ring 3-1-8 is fixedly installed on a boss at the end of a motor stator 3 facing a rear cover 8 through an adhesive, and the end part of the stator coil lead 3-3 is fixedly connected with the reed 3-1-6 through soldering tin; the motor stator 3 is arranged in the inner cavity of the motor shell 4 in an interference fit manner, and the reeds 3-1-6 on the reed fixing ring 3-1-8 are tightly attached to the contacts 3-1-5 by virtue of the elasticity of the reeds 3-1-6.

Fourthly, the edge of a pressure balance diaphragm 9 is fixedly arranged on a thinning ring groove of a flange plate boss of a rear cover bearing assembly 10 through argon arc welding, a shaft neck which is arranged on the end of the motor rotor 2 facing the rear cover 8 and is matched with a rolling bearing inner ring or a sliding bearing bush of a bearing 10-5 of the rear cover bearing assembly 10 is arranged in the rolling bearing inner ring or the sliding bearing bush of the rear cover bearing assembly 10, one end of a shielding sleeve 1 with temperature compensation ripples is sleeved in the motor rotor 2 facing the direction of the rear cover bearing assembly 10, one end of the shielding sleeve 1 with the temperature compensation ripples is fixedly arranged on the thinning ring groove on a cylinder of the rear cover bearing assembly 10 through argon arc welding; a motor rotor 2, a shielding sleeve 1, a rear cover bearing assembly 10 and a pressure balance diaphragm 9 which are connected together are arranged in the inner cavity of a motor stator 3 from the rear cover end of a motor shell 4 together, align a positioning pin hole 10-7 on a flange plate of the rear cover bearing assembly 10 and a positioning pin blind hole on a step for mounting the rear cover bearing assembly 10 in the motor shell 4, penetrate through a positioning pin 10-8 for positioning, and an inert liquid balance groove 10-6 on the front end surface of the flange plate of the rear cover bearing assembly 10 penetrates through a gap between the inner cavity of the motor stator and the shielding sleeve 1; one end of the shielding sleeve 1 without the temperature compensation corrugation is fixedly arranged on a thinning ring groove of a step hole of a motor shell 4 for installing a power output end bearing assembly 5 through argon arc welding.

Fifthly, installing the rolling bearing outer ring or the sliding bearing bush of the bearing 5-2 of the power output end bearing assembly 5 into the bearing hole of the bearing body 5-1 of the power output end bearing assembly 5, then sleeving the rolling bearing inner ring or the sliding bearing bush of the bearing 5-2 of the power output end bearing assembly 5 on the shaft neck at the other end of the motor rotor 2, meanwhile, installing the power output end bearing assembly 5 into the step hole of the power output end bearing assembly 5 installed in the motor housing 4, fixing the power output end bearing assembly 5 on the step in the motor housing 4 by using the S30408 stainless steel bearing body fixing bolt 5-5, then installing the S30408 stainless steel stirrer 7 on the stirrer installation shaft head of the motor rotor 2, and fixing the power output end bearing assembly by using the S30408 stainless steel stirrer fixing bolt 7-1.

Sixthly, after a sealing ring 8-3 is installed in a sealing groove in a boss of the rear cover 8, the sealing ring is installed on the end face of the rear cover of the motor shell 4, an axial inert liquid balance hole 8-6 of the rear cover 8 correspondingly penetrates through an inert liquid balance hole 10-3 of the rear cover bearing assembly 10, a positioning pin blind hole of the rear cover 8 is correspondingly installed on a positioning pin 10-8 matched with the rear cover bearing assembly 10, the rear cover 8 is fixed on the motor shell 4 through a rear cover bolt suite 8-4, the sealing ring 8-3 is an O-shaped ring, and the rear cover bolt suite 8-4 is made of high-strength high-quality alloy steel 35 CrMoA.

Seventh, a seal ring 6-1 is arranged in a seal groove of a flange at the end part of a kettle body of the motor shell 4, a stirrer 7-1 and a transmission shaft of the motor rotor 2 are arranged in an inner cavity of the kettle body 6 from the outside along a kettle opening 6-3, then the flange at the kettle body end of the motor shell 4 is oppositely arranged on the flange at the end part of the kettle body 6, the motor shell 4 is fixed on the kettle body 6 by a kettle body bolt sleeve 6-2, the seal ring 6-1 is an O-shaped ring, and the kettle body bolt sleeve 6-2 is made of high-strength high-quality alloy steel 35 CrMoA.

Eighth, the inert liquid filling hole 8-1 of the rear cover 8 is filled with inert liquid, and after filling, the sealing screw 8-2 is tightened to complete the installation.

Finally, respectively installing a feed valve at the feed inlet 6-4 of the stirring medium of the upper end enclosure of the kettle body 6 or connecting the feed valve with the feed pipe, installing a thermometer at the thermometer interface 6-5 and installing a pressure gauge at the pressure gauge interface 6-6, and installing a discharge valve at the discharge outlet 6-7 of the stirring medium of the lower end enclosure or connecting the discharge valve with a discharge pipe.

The stirring medium and the inert liquid are in an equilibrium process:

when a stirring medium just enters the kettle body 6 or the pressure of the stirring medium changes, in order to enable the pressure balance diaphragm 9 to rapidly act and enable the pressure at two ends of a bearing 5-2 of a sliding bearing or a rolling bearing selected from a power output end bearing assembly 5 and a bearing 10-5 of a sliding bearing or a rolling bearing selected from a rear cover bearing assembly 10 to rapidly balance without impact, a power output end medium balance hole 5-3 and a rear cover medium balance hole 10-4 from a kettle mouth 6-3 to a stirring medium balance chamber 10-2 through a gap between a motor rotor 2 and a shielding sleeve 1 are designed on the power output end bearing assembly 5 and the rear cover bearing assembly 10.

A rapid balance channel from the kettle mouth 6-3 to the stirring medium balance chamber 10-2 is specifically as follows:

the kettle opening 6-3 → the power output end medium balance hole 5-3 → the gap between the motor rotor 2 and the shielding sleeve 1 → the rear cover medium balance hole 10-4 → the stirring medium balance chamber 10-2.

In order to keep the pressure balance between the inner side and the outer side of the shielding sleeve 1 rapid and sensitive, a radial inert liquid balance hole 8-7, an axial inert liquid balance hole 8-6, an inert liquid balance hole 10-3 and an inert liquid balance groove 10-6 are designed from an inert liquid balance chamber 8-5 to a gap between the motor stator 3 and the shielding sleeve 1 on the rear cover 8 and the rear cover bearing assembly 10.

The fast balancing passage from the inert liquid balancing chamber 8-5 to the shielding sleeve 3 is specifically as follows:

the inert liquid balance chamber 8-5 → the radial inert liquid balance hole 8-7 → the axial inert liquid balance hole 8-6 → the inert liquid balance hole 10-3 → the inert liquid balance groove 10-6 → the gap between the motor stator 3 and the shielding case 1.

The operation steps are as follows:

firstly, a stator cooling liquid inlet 4-3 and a stator cooling liquid outlet 4-2 of a stator cooling jacket 4-1 are communicated with a cooling liquid external circulation pipeline, so that cooling liquid flows circularly; then connecting the motor lead 3-1-2 with a control circuit, wherein 3 groups of motor lead assemblies 3-1 ensure that the motor stator 3 is stably connected with an external three-phase power supply through a circuit; then, stirring media are gradually added into the kettle body, when the stirring media with or without pressure pass through a kettle opening 6-3 from an inner cavity of the kettle body, the stirring media quickly pass through a power output end medium balance hole 5-3 arranged on a power output end bearing assembly 5 to enter a gap between the motor rotor 2 and the shielding sleeve 1, and then quickly pass through a rear cover medium balance hole 10-4 arranged on a rear cover bearing assembly 10 to enter a stirring media balance chamber 10-2, so that the two ends of the bearings of the power output end bearing assembly 5 and the rear cover bearing assembly 10 can be quickly filled with the stirring media without being impacted; along with the entering of a stirring medium from the feeding hole 6-4, the pressure of the stirring medium in the gap between the motor rotor 2 and the shielding sleeve 1 is gradually increased to be equal to the pressure of the stirring medium outside the gap, incompressible inert liquid rapidly and freely flows between the inert liquid balance chamber 8-5 and the motor stator 3, the shielding sleeve 1 and the motor shell 4 through the axial inert liquid balance hole 8-6 and the radial inert liquid balance hole 8-7, the pressures on the two sides of the shielding sleeve 1 and the pressure balance diaphragm 9 are balanced in real time, the effect that the shielding sleeve 1 and the pressure balance diaphragm 9 are not stressed is achieved, the thickness of the shielding sleeve 1 does not need to be increased, the transmission efficiency is improved, and the service life is prolonged; after a stirring medium is filled in a gap between the motor rotor 2 and the shielding sleeve 1, an external power switch is turned on, a winding of the motor stator 3 is electrified to generate a magnetic field, power is transmitted to the motor rotor 2 through the magnetic field, and the motor rotor 2 drives the stirrer 7 to rotate so as to start mixing the stirring medium; the power output end bearing assembly 5 and the rear cover bearing assembly 10 provide stable support for the motor rotor 2 and the shielding sleeve 1; and after stirring, discharging from the discharging port 6-7.

Claims (1)

1. A high-pressure or ultrahigh-pressure shielding stirring kettle is characterized by comprising a kettle body, a stirrer, a shielding sleeve, a motor rotor, a motor stator, a motor lead component, a motor shell, a power output end bearing assembly, a rear cover, a pressure balance diaphragm and a rear cover bearing assembly;

the kettle body is a shell with end sockets at two ends thereof which are vertically upward, and is a cavity for accommodating the stirrer and forming a rotary space and an accommodating stirring medium; the upper end socket of the kettle body is provided with a through hole communicated with the inner cavity of the motor shell of the power output end of the high-pressure or ultrahigh-pressure shielding motor along the axis, the kettle opening is provided with a flange, and the flange surface is provided with a sealing surface matched with the flange at the kettle end of the motor shell, the sealing surface and the bolt hole and a threaded hole for installing the motor shell; the upper end enclosure is additionally provided with a feed inlet for stirring a medium, a thermometer port and a pressure gauge port, and the lower end enclosure is provided with a discharge outlet for stirring the medium;

the stirrer is a paddle stirrer formed by a hub and a blade according to the requirements of a stirring medium and a process, or a turbine stirrer or a propulsion stirrer formed by the hub and the blade, or a frame stirrer formed by the hub and an anchor or an oval frame or a conical bottom frame or a square frame or an anchor frame, or a spiral stirrer formed by the hub and a spiral belt; the hub is positioned at the shaft center of the stirrer, and the inner hole of the hub is matched with the shaft head of the stirrer installed on the motor rotor;

the motor shell is a cavity body which is provided with a motor stator, a reed fixing ring, a power output end bearing assembly, a rear cover bearing assembly and a step hole matched with the rear cover in an inner cavity; a step of the bearing assembly at the fixed power output end is provided with a threaded hole matched with a bolt hole of the bearing assembly at the fixed power output end, and the edge of the step close to the inner cavity is provided with a thinning ring groove for mounting a shielding sleeve; a positioning pin blind hole matched with the positioning pin hole is formed in the step for fixing the rear cover bearing assembly; the rear cover end of the motor shell is provided with a threaded hole matched with the bolt hole of the flat cover of the rear cover, and the power output end of the motor shell is provided with a flange plate, a bolt hole and a sealing groove which are matched with the end part of the kettle body and the threaded hole of the ring surface of the kettle body; the middle position of the outer cylindrical surface of the motor shell is provided with an annular groove, a stator cooling jacket is hermetically and fixedly sleeved on the annular groove to form a stator cooling chamber, and the stator cooling jacket is an integral cylinder with the inner diameter being the same as the diameter of the outer cylindrical surface of the motor shell or a biplate semi-circular arc plate with the outer diameter being the same as the diameter of the outer cylindrical surface of the motor shell; 3 holes for installing a motor lead assembly are arranged on the wall of the motor shell at the corresponding position of the reed fixing ring, and a motor stator lead perforated sheath is fixedly installed between the stator cooling jacket and the motor shell;

the motor stator consists of a stator core and a winding coil, the motor stator wound with the winding is shaped like a cylinder body with bosses at two ends, the inner cavity of the cylinder body with the winding is matched with the outer cylindrical surface of the shielding sleeve, the matching relation is clearance fit, the outer circle of the cylinder body with the winding is in interference fit with the inner hole of the motor shell, and the outer cylinder of the boss at one end facing the rear cover is fixedly connected with the inner hole of the reed fixing ring;

the 3 groups of motor lead assemblies respectively consist of a reed fixing ring, reeds, fixing screws, line pressing screws, motor leads, sealing insulating glue, an insulating sleeve and contacts; the reed fixing ring is an annular body made of insulating materials, the thickness and the inner hole of the reed fixing ring are matched with the length and the excircle of a boss at one end of the motor stator facing the rear cover, and the excircle of the reed fixing ring is matched with the inner cavity of the motor shell; the outer circle of the reed fixing ring is provided with a reed fixing groove corresponding to the mounting holes of the 3 groups of motor lead assemblies, and the bottom surface of the reed fixing groove is provided with a screw hole and a stator coil lead through hole; the reed is U-shaped, one end of the U-shaped reed is provided with a threaded hole matched with a fixing screw and a stator coil lead connecting hole, a stator coil lead is inserted into a stator coil lead through hole on the bottom surface of the reed fixing groove and is fixed on the reed through the stator coil lead connecting hole on the reed, the fixing screw penetrates through the threaded hole arranged on the reed fixing ring and is screwed into the threaded hole of the reed, the reed is fixed on the reed fixing ring, the stator coil of the motor is communicated with the reed through the stator coil lead, and the other end of the U-shaped reed is tightly attached to the contact after being installed by; the insulation sleeve is made of insulation materials, one end of the insulation sleeve is provided with a round sleeve with a baffle ring, one end of the round sleeve without the baffle ring is installed in a motor lead component installation hole from the inner cavity of the motor shell in an interference fit mode, the position of a contact is matched with the baffle ring of the insulation sleeve, one end of a motor lead penetrates through the motor lead component installation hole and the insulation sleeve and then is fixedly connected with the contact, and the other end of the motor lead is a three-phase power supply connection end; then filling sealing insulating glue to fix 3 groups of motor leads at the center of the motor lead mounting hole and fix the contact fixed with the motor leads at the position matched with the insulating sleeve baffle ring; after the sealing insulating glue is cured, installing a line pressing screw;

the shielding sleeve is a thin-wall cylinder sleeved between the motor stator and the motor rotor, the diameter of the inner cavity of the shielding sleeve is in clearance fit with the motor rotor, and the outer diameter of the shielding sleeve is in clearance fit with the inner cavity of the motor stator; the front end and the rear end of the bearing are respectively and fixedly arranged on a power output end bearing assembly and a rear cover bearing assembly, and one end connected with the rear cover bearing assembly is provided with temperature compensation ripples;

the motor rotor is composed of a rotor shaft and a cylindrical winding wound at the middle part of the rotor shaft or a cylindrical squirrel cage installed at the middle part of the rotor shaft, both ends of the motor rotor are respectively provided with a journal matched with a bearing inner ring or a bearing bush of a power output end bearing assembly and a journal matched with a shaft head for installing a stirrer and a bearing inner ring or a bearing bush of a rear cover bearing, the outer cylindrical surface of the motor rotor is matched with a cavity of a shielding sleeve, the matching relationship is clearance fit, and the diameter of the shaft head of the motor rotor for installing the stirrer is matched with the diameter of an inner;

the power output end bearing assembly consists of a flange plate with a boss, a bearing body formed by arranging a bearing hole at the axle center of the boss and a bearing arranged in the bearing hole, wherein the bearing is a rolling bearing or a sliding bearing, and countersunk bolt holes arranged on a step hole in the inner cavity of the motor stator are uniformly distributed on the flange plate; a through power output end medium balance hole is arranged at the outer edge of the end face bearing hole of the bearing body along the axis;

the rear cover is a flat cover with a boss, a counter bore matched with the rear cover bearing assembly is arranged at the axial position of the end face of the boss, a groove is arranged at the center of the counter bore and is an inert liquid balance chamber, and a sealing groove is arranged on the cylindrical surface of the boss; an axial inert liquid balance hole, a radial inert liquid balance hole and a positioning pin blind hole are arranged between the boss end face inert liquid balance chamber and the edge of the boss, and an inert liquid filling hole is arranged at a position corresponding to one position of the axial inert liquid balance hole on the end face of the flat cover in a penetrating way; bolt holes which are arranged on the motor shell are uniformly distributed on the ring surface of the flat cover;

the rear cover bearing assembly is a bearing body coaxially formed by a cylinder, a transition cone and a flange plate, a bearing hole is formed in the axis position of the combined bearing body, and a bearing is installed in the bearing hole and is a rolling bearing or a sliding bearing; a boss matched with the counter bore of the rear cover is arranged at one end of the flange plate, and a stirring medium balance chamber corresponding to the inert liquid balance chamber of the rear cover is arranged at the center of the boss; the edge of the boss is provided with a thinning ring groove for mounting a pressure balance diaphragm, and the pressure balance diaphragm is fixedly mounted in the thinning ring groove of the flange plate boss of the rear cover bearing assembly; the edge of the end part of the cylinder of the rear cover bearing assembly is provided with a thinning ring groove for installing a shielding sleeve, and the shielding sleeve with the temperature compensation corrugation end is fixedly installed on the thinning ring groove of the end part of the cylinder of the rear cover bearing assembly in a sealing way; the flange plate is respectively provided with a positioning pin hole and an inert liquid balance hole corresponding to the inert liquid balance hole of the rear cover, meanwhile, an inert liquid balance groove communicated with the inner cavity of the motor stator is arranged at the position of the inert liquid balance hole on the front end surface of the flange plate, and the positioning pin hole is correspondingly matched with a positioning pin blind hole on a matched rear cover boss; a rear cover medium balance hole is arranged at the outer edge of the bearing hole on the end surface of the cylinder along the axis;

the pressure balance diaphragm is a circular diaphragm which is hermetically fixed on a stirring medium balance chamber of the rear cover bearing assembly and is matched with an edge ring groove of the stirring medium balance chamber and provided with circular ring ripples;

the total installation process:

firstly, directly sleeving a stator cooling jacket cylinder with the same inner diameter as the outer diameter of a motor shell on an annular groove on the outer cylinder of the motor shell, or fixedly connecting a stator cooling jacket cylinder with the same outer diameter as the outer diameter of the motor shell into a cylinder after covering a double-sheet semi-circular arc plate on the annular groove on the outer cylinder of the motor shell, and then fixedly and hermetically installing the stator cooling jacket cylinder on the intersection part of the annular groove on the outer cylinder of the motor shell and the outer cylinder of the motor shell to form a stator cooling chamber; a stator cooling liquid inlet and a stator cooling liquid outlet which are communicated with the stator cooling chamber are fixedly arranged on the stator cooling sleeve, and a motor stator lead perforated sheath is fixedly arranged between the stator cooling sleeve and the motor shell;

then, installing an insulating sleeve of the motor lead assembly into the motor lead assembly installation hole from the inner cavity of the motor shell in an interference fit manner; installing and fixing the end part of a wire at one end of a motor lead with a contact, enabling the other end of the motor lead to penetrate through an inner hole of an insulating sleeve and a motor lead installing hole in the cylinder wall of a motor shell, moving the contact to a position matched with a retaining ring of the insulating sleeve, then filling sealing insulating glue, fixing the motor lead at the center of the motor lead installing hole, fixing the contact fixed with the motor lead at the position matched with the retaining ring of the insulating sleeve, and installing a line pressing screw after the glue is cured;

thirdly, a stator coil lead penetrates through a reed fixing ring and a lead connecting hole on a reed, then the reed is installed on the reed fixing ring through a fixing screw, a reed on the reed fixing ring is aligned to a motor lead assembly contact installed on a motor shell along the circumferential direction, then the reed fixing ring is fixedly installed on a boss of a motor stator facing to the rear cover end, and the end part of the stator coil lead is fixedly connected with the reed; installing the motor stator into the inner cavity of the motor shell in an interference fit manner, wherein the reed on the reed fixing ring is tightly attached to the contact by virtue of the elasticity of the reed;

fourthly, fixedly mounting a pressure balance diaphragm on a thinning ring groove of a flange plate boss of the rear cover bearing assembly, mounting a shaft neck which is arranged at one end of the motor rotor facing to the rear cover and is matched with a rolling bearing inner ring or a sliding bearing bush of the rear cover bearing assembly into the rolling bearing inner ring or the sliding bearing bush of the rear cover bearing assembly, sleeving one end of a shielding sleeve with temperature compensation corrugations into the motor rotor facing to the direction of the rear cover bearing assembly, and fixedly mounting one end of the shielding sleeve with the temperature compensation corrugations on the thinning ring groove on a cylinder of the rear cover bearing assembly; the motor rotor, the shielding sleeve, the rear cover bearing assembly and the pressure balance diaphragm which are connected together are arranged in the inner cavity of the motor stator together from the rear cover end of the motor shell, aligned with a positioning pin hole in a flange plate of the rear cover bearing assembly and a positioning pin blind hole in a step of the motor shell on which the rear cover bearing assembly is arranged, and penetrated through by a positioning pin for positioning, and an inert liquid balance groove on the front end surface of the flange plate of the rear cover bearing assembly penetrates through a gap between the inner cavity of the motor stator and the shielding sleeve; fixedly mounting one end of the shielding sleeve without the temperature compensation corrugations on a thinning ring groove of a step hole for mounting a power output end bearing assembly in the motor shell;

fifthly, installing a rolling bearing outer ring or a sliding bearing bush of a bearing of the power output end bearing assembly into a bearing hole of a bearing body of the power output end bearing assembly, then sleeving a rolling bearing inner ring or the sliding bearing bush of the bearing of the power output end bearing assembly on a shaft neck at the other end of the motor rotor, meanwhile, installing the power output end bearing assembly into a step hole of the power output end bearing assembly installed in a motor shell, fixing the power output end bearing assembly on a step in the motor shell by using a bearing body fixing bolt, installing a stirrer on a stirrer installing shaft head of the motor rotor, and fixing the stirrer by using a stirrer fixing bolt;

sixthly, mounting a sealing ring in a sealing groove on a boss of the rear cover, and then mounting the sealing ring on the end surface of the rear cover of the motor shell, wherein an inert liquid balance hole of the rear cover corresponds to an inert liquid balance hole penetrating through a bearing assembly of the rear cover, a blind hole of a positioning pin of the rear cover is correspondingly mounted on a matched positioning pin on the bearing assembly of the rear cover, and the rear cover is fixed on the motor shell by a rear cover bolt sleeve;

seventhly, installing a sealing ring in a flange sealing groove at the kettle body end of the motor shell, installing the stirrer and a motor rotor transmission shaft into an inner cavity of the kettle body from the outside along a kettle opening, installing a flange at the kettle body end of the motor shell on the end part of the kettle body in a butt mode, and fixing the motor shell on the kettle body by using a kettle body bolt sleeve;

eighthly, filling inert liquid in the inert liquid filling hole in the rear cover, and tightening the sealing screw to finish installation after filling;

and finally, respectively installing a feed valve at a stirring medium feed port of the upper end socket of the kettle body or connecting the feed valve with the feed pipe, installing a thermometer at a thermometer port and installing a pressure gauge at a pressure gauge port, and installing a discharge valve at a stirring medium discharge port of the lower end socket or connecting the discharge valve with a discharge pipe.

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