CN115492771A - Novel shaftless silent magnetic transmission double-suction rotary shell pump - Google Patents

Abstract

The invention discloses a novel shaftless silent magnetic transmission double-suction rotary shell pump. The pump outer shell is provided with a main shaft, a collecting pipe and a shunting inner shell, a rotor cavity shell sleeved outside the collecting pipe and the main shaft is arranged in the shunting inner shell, a left impeller and a right impeller are arranged in an inner cavity of the rotor cavity shell, and the rotor cavity shell and the left impeller and the right impeller form a whole and rotate around the main shaft and the collecting pipe; fluid flows into a vertical flow channel between the shunting inner shell and the pump outer shell through the top end of the pump outer shell, then sequentially flows into a rotor cavity between the left impeller and the right impeller through a horizontal flow channel between the collecting pipe and the main shaft and a ring flow channel between the impellers and the rotor cavity shell; the permanent magnet steel on the periphery of the rotor cavity shell and the coil winding of the pump shell are matched to drive the pump shell to rotate so as to drive the impeller, fluid enters the rotor cavity from the left side and the right side under the centrifugal action, and then flows out after passing through the hollow channel of the collecting pipe. The invention improves the maximum flow of the rotary shell pump, improves the integral silencing effect of the rotary shell pump, has better flow state of the flow field, prolongs the service life, has smaller size and lighter weight.

Description

A New Shaftless Silent Magnetic Drive Double Suction Rotary Shell Pump

technical field

The invention relates to a rotary casing pump, in particular to a novel shaftless silent magnetic drive double-suction rotary casing pump used for fluid transportation in petrochemical, papermaking, food and other fields.

Background technique

Rotary casing pump is a single-stage, cantilever type pump with small flow and high head. It is mainly used in petrochemical, papermaking, food and other fields to transport clean liquid or liquid containing solid particles. Since then, due to its simple structure, small size, stable operation, low speed, good anti-cavitation performance, good sealing performance, and its good reputation and strong follow-up development in these fields, it has gained wider popularity. application. Rotary casing pumps have become infusion pumps for drilling flushing systems in the automobile industry, feed pumps for carbon black production lines, and have become the preferred equipment for deep well waste treatment in chemical factories, and the preferred choice for high-pressure cleaning systems in food processing, manufacturing workshops, and paper industries. Standard equipment.

In these practical engineering applications, this single-suction, cantilever-type rotary casing pump already has very good performance, but we also found its shortcomings in the actual use process, which limits its maximum use. In addition, the structure of the motor and the pump body still has a large volume and installation space when installed and used, especially the axial dimension is longer due to the existence of the motor. At the same time, due to the mechanical seal, there is leakage in the process of water delivery.

Contents of the invention

In order to overcome the shortcomings of the existing rotary casing pumps in the background technology, and in combination with the problems encountered in the actual production under the background technology, in view of the shortcomings of this single-suction small flow and cantilever casing rotary casing pumps, some technical solutions have been made. The inventors have invented a novel shaftless silent magnetic drive double-suction rotary casing pump.

The invention can be used for fluid transportation in petrochemical, papermaking, food and other fields. Compared with the traditional rotary casing pump, the present invention improves the maximum delivery flow rate of the rotary casing pump, cancels the motor drive, adopts magnetic drive, effectively reduces the weight and the overall axial length of the rotary casing pump, and has smaller size and heavier weight. light. Improve the overall mute effect of the rotary casing pump, make the flow state of the flow field better and prolong the service life;

The technical scheme adopted in the present invention is:

The invention includes a main shaft, a pump casing, a left impeller, a coil winding, a permanent magnetic steel, a rotor chamber casing, a collecting pipe and a right impeller; the outer wall of one end of the pump casing is connected with a bearing box, and the main shaft is arranged inside the bearing box, and the end of the main shaft extends into the Into the pump casing, a shunt inner casing is installed in the inner cavity of the pump casing, the pump casing is fixedly arranged in the inner cavity of the shunt inner casing, and the rotor chamber casing is arranged in the pump casing, and the rotor chamber casing and the pump casing are aligned along the axis of the main shaft. The hinge shaft is hinged; the outer peripheral surface of the rotor chamber shell is inlaid with permanent magnetic steel, and the inner peripheral surface of the pump housing corresponding to the permanent magnet steel circumference is inlaid with coil windings; the shunt inner shell, pump housing and rotor cavity shell On both sides, there are through holes coaxial with the axis of the main shaft for the main shaft and the collecting pipe to pass through. A collecting pipe is installed in the inner cavity of the chamber shell. The collecting pipe includes a shaft part and a diameter part. The shaft part extends from the outside of the pump casing into the pump casing, and then passes through the shunt inner casing, the pump casing and the rotor chamber casing. The other side of the through hole extends into the rotor cavity shell. The shaft part and the main shaft are arranged coaxially but not connected. The end of the shaft part extending into the rotor cavity shell is connected to the diameter part. Extending from the end of the shaft in the radial direction, the shaft and the diameter are connected to form an L shape; a left impeller and a right impeller are arranged in the inner cavity of the rotor cavity, and the end of the main shaft extends into the pump casing and passes through The end of the shunt inner shell, the pump shell and the through hole on one side of the rotor cavity shell are coaxially fixedly connected with the left impeller, and the right impeller is coaxially mounted on the shaft of the header through a water-lubricated bearing. The left impeller and the right The peripheral edges of the impellers are all fixedly connected to the inner peripheral surface of the rotor chamber casing, so that the rotor chamber casing, the left impeller and the right impeller form a whole and rotate around the main shaft and the shaft of the collector.

The top of the pump casing is provided with a liquid inlet, and there are gaps communicating with the liquid inlet between the two ends of the splitter inner casing along the axial direction of the main shaft and the inner wall of the inner cavity of the pump casing, and they are respectively used as two independent vertical There are gaps between the flow channel, the shaft and the main shaft of the collector and the through-hole walls on both sides of the shunt inner casing, the pump casing, and the rotor cavity casing, and they are respectively used as the left horizontal flow path, the right horizontal flow path, and the rotor There are gaps between the inner end surface of the cavity shell near the left impeller and the left impeller, and between the inner end surface of the rotor cavity shell close to the right impeller and the right impeller, which serve as left and right annular flow channels respectively; the left impeller and The inner part of the rotor cavity shell between the right impeller is used as the rotor cavity, and the outer ring part of the two annular flow passages corresponding to the left impeller and the right impeller passes through the hollow between the peripheral edge of the left impeller and the right impeller and the inner peripheral surface of the rotor cavity shell. The through groove communicates with the rotor cavity, and the inner ring parts of the two annular flow passages corresponding to the left impeller and the right impeller pass through the left horizontal flow passage, the right horizontal flow passage and the two vertical flow passages corresponding to the shaft of the main shaft and the collector pipe respectively. connected.

The fluid flows in from the liquid inlet and then flows into the two vertical flow channels at the front and rear ends of the splitter inner casing along the axial direction of the main shaft. The two vertical flow channels then flow into the left impeller and the right The two annular flow passages corresponding to the impellers flow into the rotor cavity through the hollow channel between the peripheral edges of the left impeller and the right impeller and the inner peripheral surface of the rotor cavity shell.

The top surface of the split flow inner casing facing the liquid inlet is provided with a ridge-shaped surface as the wall surface of the inlet section.

The radial part of the collecting pipe is located in the rotor cavity, and the end of the radial part of the collecting pipe is bent vertically along the tangential direction to form a bent part. The impeller and the right impeller form a whole and rotate around the main shaft and the shaft of the collector in the opposite tangential direction; there is a hollow channel inside the collector, and the hollow channel is connected from the shaft of the collector to the bend through the diameter. part, and the two ends of the hollow channel respectively go through the end faces of the shaft of the collector and the bending part, and the port of the hollow channel on the shaft of the collector is used as a liquid outlet; the fluid in the rotor cavity is bent through the collector The inlet of the hollow channel on the end face of the header flows in, and the outlet flows out from the outlet of the hollow channel on the end face of the header shaft.

The header prevents the leakage of the fluid medium by means of a mechanical seal. The mechanical seal mainly refers to the structure between the collector and the rotor, which prevents the leakage of the running fluid, and the reliability of the seal is very good.

The middle part of the main shaft passes through the pump shell and is set in the bearing box through the bearing support. The bearing box is filled with lubricating oil, and the other end of the main shaft is connected with the bearing box, and is self-lubricated by the lubricating oil in the bearing box.

The top of the bearing box is provided with an oil injection hole, an oil plug is installed in the oil injection hole, and an oil mark is installed at the bottom of the bearing box.

The rotor chamber shell, the left impeller and the right impeller are integrally cast.

The rotor cavity shell and the pump shell are connected through the magnetic transmission of the coil winding and the permanent magnet steel, that is, the coil winding is energized, and the magnetic field is generated through the coil winding to drive the permanent magnet steel to rotate, thereby driving the rotor cavity shell in the pump. Rotate in the housing.

The wall surface of the inlet section and the left and right flow channels in the present invention mean that when the fluid medium flows vertically downward at the liquid inlet, the fluid flows into the rotor cavity from the left and right channels respectively due to the effect of the wall surface of the inlet section. The left channel is composed of the main shaft and the rotor cavity shell, and the right channel is composed of the collector tube and the rotor cavity shell.

The outer circumference of the rotor chamber casing is inlaid with permanent magnetic steel, and the coil winding is installed in the pump casing. The rotary casing pump relies on an external three-phase power supply connected to the coil winding through wires to form a circular rotating and changing magnetic field around the pump casing, which drives the permanent magnet in the rotor cavity to rotate.

The fluid medium flows in through the liquid inlet, and the liquid inlet is set in the vertical direction of the rotor chamber. Between the rotor chamber and the liquid inlet, from the inside to the outside, there are respectively the rotor chamber shell and the two ends for fixedly supporting the rotor chamber shell. The pump casing, inner cavity and the wall of the inlet section for flow separation, the fluid flows left and right under the action of the wall of the inlet section and separates, because the impeller is connected with the rotor cavity shell, the rotor cavity shell drives the impeller to rotate under the action of magnetic force, and passes through the left and right impellers Under the action of the centrifugal force, the fluid enters the high-speed synchronously rotating rotor chamber from the left and right sides, so that the liquid around the rotor chamber has a high pressure, and the high-speed liquid flows into the stationary collection pipe, and the flow pipe is equivalent to the pressurized water of an ordinary centrifugal pump. The chamber has the function of diffusing, which converts velocity energy into pressure energy, and finally outputs high-pressure liquid through the header.

Compared with prior art, the beneficial effect of the present invention is:

The invention adopts double suction ports. Compared with the traditional rotary casing pump, it is sensitive to cavitation when conveying the medium, so the inlet flow rate is not easy to be too large, thereby limiting the maximum flow that the rotary casing pump can deliver. After using this device, the original The single suction inlet is changed to double suction, and the inlet speed is reduced to half of that of single suction, which can greatly improve the anti-cavitation performance of the rotary casing pump; at the same time, under the same NPSH requirements, the maximum delivery flow of the rotary casing pump can also be increased , the double suction port can also make the axial force of the rotary casing pump self-balancing.

The rotary casing pump of the present invention cancels the motor drive, adopts the shaftless electromagnetic drive, effectively reduces the weight and the overall axial length of the rotary casing pump, and is smaller in size and lighter in weight. Compared with traditional motor drive, shaftless electromagnetic drive pump can reduce noise, improve internal flow state and reduce flow loss.

Description of drawings

Fig. 1 is a sectional view of the present invention;

Fig. 2 is a three-dimensional diagram of a header;

Fig. 3 is a sectional view of the impeller.

In the figure: 1. Oil mark, 2. Bearing, 3. Main shaft, 4. Bearing box, 5. Oil plug, 6. Felt ring, 7. Pump casing, 8. Left horizontal channel, 9. Left impeller, 10. Liquid inlet, 11. Wall surface of inlet section, 12. Inner chamber, 13. Pump casing, 14. Coil winding, 15. Permanent magnetic steel, 16. Rotor cavity shell, 17. Collector, 18. Water lubricated bearing , 19, packing seal, 20, right horizontal flow channel, 21, liquid outlet, 22, right impeller, 23, rotor cavity.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

As shown in FIG. 1 , the concretely implemented pump includes a main shaft 3 , a pump casing 7 , a left impeller 9 , a coil winding 14 , a permanent magnetic steel 15 , a rotor chamber shell 16 , a manifold 17 and a right impeller 22 .

One end of the pump casing 7 is coaxially connected to the outer wall to install the bearing box 4. The main shaft 3 is arranged coaxially through the bearing 2 in the bearing box 4. The end of the main shaft 3 extends into the pump casing 7. When the main shaft 3 passes through the pump casing 7, a felt ring is installed. 6 to seal. A shunt inner casing is installed in the inner cavity of the pump casing 7, the bottom of the shunt inner casing is fixed on the bottom of the pump casing 7, a pump casing 13 is fixedly arranged in the inner cavity 12 of the shunt inner casing, and a rotor chamber casing 16 is arranged inside the pump casing 13. The rotor chamber casing 16 and the pump casing 13 are hinged by the hinge axis along the axis of the main shaft 3, the rotor chamber casing 16 is rotatably hinged with the pump casing 13 through the packing seal 19, and the bottoms of both ends of the rotor chamber casing 16 and the shunt inner casing 1. The bottom of the inner chamber of the pump casing 7 is connected in a sealed and rotational manner. Specifically, the hole end faces of the through holes at both ends of the rotor chamber shell 16 are rotationally connected with the bottoms of both ends of the splitter inner shell and the bottom of the pump shell 7 through packing seals 19 .

As shown in Figure 1, in specific implementation, a pump casing 13 is installed in the inner cavity of the shunt inner casing, and the pump casing 13 is sleeved outside the rotor cavity casing 16 above the collector pipe 17 and the main shaft 3, and the inner surface of the pump casing 13 and The outer surface of the rotor chamber shell 16 is rotationally fitted and connected, and both ends of the rotor chamber shell 16 are axially fixed under the action of the pump housing 13 for fixed support, so that the left and right ends of the rotor chamber shell 16 can be axially fixed well, ensuring that the rotor chamber Stability of shell 16 during rotation.

The outer peripheral surface of the rotor cavity shell 16 is inlaid with an annular permanent magnet 15, the coil winding 14 is installed in the pump housing 13, and the inner peripheral surface of the pump housing 13 corresponding to the circumference of the permanent magnet 15 is inlaid with an annular coil The winding 14, the rotor cavity shell 16 and the pump housing 13 are connected by the magnetic transmission between the coil winding 14 and the permanent magnet 15, that is, the coil winding 14 is energized, and the magnetic field is generated by the coil winding 14 to drive the permanent magnet 15 to rotate. Further, the rotor chamber casing 16 is driven to rotate in the pump casing 13 .

The two sides of the shunt inner casing, the pump casing 13 and the rotor chamber casing 16 are respectively provided with through holes coaxial to the axial direction of the main shaft 3 for the main shaft 3 and the header 17 to pass through, and the main shaft 3 is pierced in the shunt Shell, pump casing 13 and one side of rotor chamber shell 16 are arranged in the through holes.

A collecting pipe 17 is installed in the inner cavity of the rotor cavity shell 16. The collecting pipe 17 includes a shaft part and a diameter part. The shaft part extends from the pump casing 7 into the pump casing 7. It is fixedly connected with the pump casing 7, and then penetrates through the through hole on the other side of the shunt inner casing, the pump casing 13 and the rotor chamber casing 16, and then extends into the rotor chamber casing 16. The shaft part and the main shaft 3 are arranged coaxially but not Connected, relatively arranged on both sides of the shunt inner casing, the pump casing 13 and the rotor chamber casing 16, the shaft part is connected to the radial part at the end extending into the rotor chamber casing 16, the diameter part is perpendicular to the shaft part and from the shaft part The end part is extended and arranged along the radial direction, and the shaft part and the radial part are connected to form an L shape.

A left impeller 9 and a right impeller 22 are arranged in the inner cavity of the rotor cavity shell 16, and the end of the main shaft 3 extends into the pump shell 7 and passes through the split flow inner shell, the pump shell 13 and the through hole on one side of the rotor cavity shell 16. The end part is coaxially fixedly connected with the left impeller 9, and the left impeller 9 and the main shaft 3 are fixed by a round head flat key coaxial sleeve, and the right impeller 22 is coaxially mounted on the shaft of the header 17 through the water-lubricated bearing 18 , the peripheral edges of the left impeller 9 and the right impeller 22 are all fixedly connected to the inner peripheral surface of the rotor chamber shell 16, so that the rotor chamber shell 16, the left impeller 9 and the right impeller 22 form a whole and surround the main shaft 3 and the header 17 axial parts rotate.

The top of the pump casing 7 is provided with a liquid inlet 10, and the two ends of the shunt inner casing along the axial direction of the main shaft 3 and the inner wall of the inner cavity of the pump casing 7 have gaps communicating with the liquid inlet 10 and serve as two independent There are gaps between the vertical flow channel, the shaft portion of the collector 17 and the main shaft 3 and the through-hole walls on both sides of the shunt inner shell, the pump casing 13, and the rotor cavity shell 16, and they are respectively used as the left horizontal flow channel 8 , the right horizontal flow channel 20, the rotor cavity shell 16 has between the inner end surface near the left impeller 9 side and the left impeller 9, and the rotor cavity shell 16 has between the inner end surface close to the right impeller 22 side and the right impeller 22 The gaps are used as left and right annular runners respectively.

As shown in Figure 3, the outer edges around the left impeller 9 and the right impeller 22 are provided with hollow through grooves between the inner peripheral surface of the rotor cavity shell 16, and the inner cavity of the rotor cavity shell 16 between the left impeller 9 and the right impeller 22 Part is used as the rotor cavity 23, and the outer ring parts of the two annular channels corresponding to the left impeller 9 and the right impeller 22 are connected to the rotor through the hollowed-out groove between the peripheral edge of the left impeller 9 and the right impeller 22 and the inner peripheral surface of the rotor chamber shell 16. The chamber 23 communicates, and the inner ring parts of the two annular flow channels corresponding to the left impeller 9 and the right impeller 22 respectively pass through the left horizontal flow channel 8 and the right horizontal flow channel 20 corresponding to the shaft of the main shaft 3 and the collector 17, and the split inner casing. It communicates with the two vertical passages between the pump casing 7.

After the fluid flows in from the liquid inlet 10, under the guidance of the wall surface 11 of the inlet section, it flows into the two vertical flow channels at the front and rear ends of the splitter inner shell along the axis of the main shaft 3, and the two vertical flow channels pass through the left horizontal flow channel respectively. 8. The right horizontal channel 20 then flows into the two annular channels corresponding to the left impeller 9 and the right impeller 22, and then passes through the hollow channel between the peripheral edges of the left impeller 9 and the right impeller 22 and the inner peripheral surface of the rotor cavity shell 16 into the rotor chamber 23.

The top surface of the split inner shell facing the liquid inlet 10 is set as a ridge-shaped surface as the inlet section wall 11 , and the fluid flowing in from the liquid inlet 10 hits the inlet section wall 11 . The wall surface 11 of the inlet section is used as a flow channel for the fluid medium, and the surface is smoothed and anti-corrosion treated.

As shown in Figure 2, the radial part of the collector 17 is located in the rotor cavity 23, and the end of the radial part of the collector 17 is bent vertically along the tangential direction to form a bent part, and the bent part of the collector 17 is bent vertically in the tangential direction The direction is opposite to the clockwise tangential direction of the integral body formed by the rotor cavity shell 16, the left impeller 9 and the right impeller 22 and rotates around the main shaft 3 and the shaft of the collector 17; The shaft portion of the header 17 is connected to the bent portion via the diameter portion, and the two ends of the hollow channel respectively pass through the end faces of the shaft portion of the header 17 and the bent portion, and the hollow channel is at the port of the shaft portion of the header 17. As a liquid outlet 21; the fluid in the rotor chamber 23 flows in through the hollow channel inlet on the end face of the bending part of the collector 17, and flows out from the hollow channel outlet on the end face of the axial part of the collector 17, and the end face of the axial part of the collector 17 is fixed on pump housing7. The hollow passage on the axial end surface of the collecting pipe 17 serves as the liquid outlet 21 of the double-suction rotary casing pump.

The liquid inlet 10 makes the flow of the fluid medium separate under the action of the wall surface 11 of the inlet section, and the left and right flow passages formed by connecting the left and right vertical flow passages, horizontal flow passages, and annular flow passages together in the left impeller 9 and the right impeller 22 The fluid enters the rotor cavity 23 under the action of the fluid, so that the fluid enters the rotor cavity 23 from the left and right sides, and finally flows out from the liquid outlet 21 through the header 17.

The middle part of the main shaft 3 passes through the pump casing 7 and then is supported by the bearing 2 and placed in the bearing box 4. The bearing box 4 is filled with lubricating oil, and the other end of the main shaft 3 is connected with the bearing box 4, and the lubricating oil in the bearing box 4 Carry out self-lubrication.

The top of the bearing box 4 is provided with an oil filling hole for the bearing box 4 to fill the bearing box 4 with oil, and an oil plug 5 is installed in the oil filling hole, and an oil gauge 1 for monitoring the amount of oil in the bearing box 4 is installed at the bottom of the bearing box 4 , so that it is more convenient to add and monitor lubricating oil.

The hole end surfaces of the through holes at both ends of the rotor chamber shell 16 are rotatably connected with the bottoms of both ends of the splitter inner shell and the bottom of the pump shell 7 through packing seals 19 . A felt ring 6 is installed between the main shaft 3 and the pump casing 7 to seal.

The main shaft on the left and the header 17 on the right are all sealed by a packing seal 19 to prevent the leakage of the fluid medium, so that no fluid enters the cavity 12 between the pump casing 13 and the splitter inner casing; the header 17 and the right The gap between the impellers 22 is filled with water flow, which is connected by water-lubricated bearings 18. On the one hand, the right bearing can rotate better, on the other hand, it can make better sealing between the collector and the rotor chamber. The pressure between the main shaft 3 and the pump casing 7 is not high, and the felt ring 8 seal is selected instead of the mechanical seal selected by the general rotary casing pump, which prevents the leakage of the operating fluid and makes the seal reliable. .

The rotor cavity shell 16, the left impeller 9 and the right impeller 22 are integrally cast. The main shaft and the left impeller are connected together by keys, and the left and right impellers are integrated with the entire rotor cavity shell, which makes the installation and disassembly of the two easier and more convenient for the former. In the traditional rotary casing pump, the rotor chamber casing and the main shaft are connected together by screws, and the impeller and casing are also integrated, which solves the problem that it cannot be easily disassembled and installed.

The rotor cavity shell 16 and the pump housing 13 are connected through the magnetic transmission of the coil winding 14 and the permanent magnet steel 15, that is, the coil winding 14 is energized, and the magnetic field generated by the coil winding 14 drives the permanent magnet steel 15 to rotate, thereby driving the rotor The chamber housing 16 rotates in the pump housing 13 .

The pump casing 13 is sleeved outside the rotor chamber casing 16, and the inner surface of the pump casing 13 and the outer surface of the rotor chamber casing 16 are connected by magnetic force transmission. The rotary casing pump relies on an external three-phase power supply connected to the coil winding 14 through wires to form a circular rotating and changing magnetic field around the pump casing, which drives the permanent magnetic steel 15 in the rotor chamber casing 16 to rotate, and then drives the left and right impellers to run; the rotor chamber casing The fluid in 16 flows out from the liquid outlet 21 of the header 17 after being accelerated and pressurized by the impeller volute.

In this way, the shaftless electromagnetic drive is realized, the noise is reduced, the internal flow state is improved and the flow loss is reduced.

The invention realizes the double suction of the rotary casing pump through the separation of the wall surface of the inlet section and the action of the left and right impellers. By canceling the motor drive and adopting the shaftless electromagnetic drive, the noise is effectively reduced, the internal flow state is improved, the flow loss is reduced, and the rotary casing pump is reduced. The weight and the overall axial length, the size is smaller and the weight is lighter.

In concrete implementation, as shown in Figure 1, working process of the present invention is as follows:

Firstly, after installing the rotary casing pump in the pipeline and finishing debugging, the coil winding 14 is supplied with three-phase alternating current, so that a circular rotating and changing magnetic field around the pump casing will be formed in the coil winding 14 . When the permanent magnet steel 15 in the outer circumference of the rotor cavity shell senses its changing magnetic field, an induced current will be generated, and it will rotate under the action of Lorentz force in the magnetic field, because the permanent magnet steel 15 is embedded in the outer circumference of the rotor cavity shell 16 and left The impeller 9 and the right impeller 22 are connected to the rotor cavity shell 16, so the impeller is driven to rotate as a whole.

During the overall rotation process formed by the rotor chamber shell 16, the left impeller 9, and the right impeller 22, the fluid medium enters the interior of the pump housing 7 through the liquid inlet 10, and flows from the inlet section wall 11 along the inlet section wall under the action of the inlet section wall 11. The vertical flow channel on the main shaft side and the vertical flow channel on the collector side respectively enter the left horizontal flow channel 8 on the main shaft side and the right horizontal flow channel 20 on the collector side, and then respectively enter the annular flow channel and the The inner ring part of the annular flow channel on the collector side flows into the rotor cavity 23;

The rotation of the two impellers and the rotor chamber shell 16 produces the effect of centrifugal force, which drives the fluid medium in the rotor chamber 23 to throw from the center of the rotor chamber 23 to the outer edge of the rotor chamber 23, and the speed increases, with a certain pressure and a high pressure. Due to the rotation of the left and right impellers, the fluid in the left and right flow channels has a high speed energy, so that double suction on the left and right sides can be realized, and the maximum flow rate of the rotary casing pump can be improved.

Since the tangential direction bent by the bending part at the radial end of the collector pipe 17 is opposite to the direction of rotation of the two impellers and the rotor chamber shell 16, the fluid flowing in the rotation at the outer edge of the rotor chamber 23 enters the collector pipe 17 and bends. The inlet of the hollow channel on the end face of the header, and then flows out from the outlet of the hollow channel on the end face of the axial part of the header 17.

It can be seen from this implementation that the present invention has designed the double suction inlet formed by the wall surface of the inlet section and the structure that relies on the magnetic drive to drive the rotor chamber shell and the impeller to rotate, and makes full use of the structure of the double suction inlet formed by the separation chamber shell to improve the rotary casing pump. The maximum flow rate, the motor drive is canceled, and the shaftless drive is realized through electromagnetic drive, which improves the overall quiet effect of the rotary casing pump, makes the flow state of the flow field better and prolongs the service life; effectively reduces the weight and cost of the rotary casing pump. Overall axial length, smaller size and lighter weight.

Claims (10)

1. The utility model provides a novel shaftless silence magnetic drive double suction revolves shell pump which characterized in that:

the permanent magnet synchronous motor comprises a main shaft (3), a pump shell (7), a left impeller (9), a coil winding (14), permanent magnet steel (15), a rotor cavity shell (16), a collecting pipe (17) and a right impeller (22); the outer wall of one end of the pump outer shell (7) is connected with and provided with the bearing box (4), the main shaft (3) is arranged in the bearing box (4), the end part of the main shaft (3) extends into the pump outer shell (7), the cavity in the pump outer shell (7) is internally provided with the shunting inner shell, the inner cavity (12) of the shunting inner shell is fixedly provided with the pump shell (13), the pump shell (13) is internally provided with the rotor cavity shell (16), and the rotor cavity shell (16) is hinged with the pump shell (13) through a hinge shaft along the axial direction of the main shaft (3); the outer peripheral surface of the rotor cavity shell (16) is embedded with permanent magnet steel (15), and the inner peripheral surface of the pump shell (13) corresponding to the circumference of the permanent magnet steel (15) is embedded with a coil winding (14);

through holes which are coaxial with the main shaft (3) and used for the main shaft (3) and the collecting pipe (17) to penetrate through are respectively formed in two sides of the shunting inner shell, the pump shell (13) and the rotor cavity shell (16), and the main shaft (3) penetrates through the through holes in one side of the shunting inner shell, the pump shell (13) and the rotor cavity shell (16) to be arranged; a collecting pipe (17) is arranged in a cavity inside the rotor cavity shell (16), the collecting pipe (17) comprises a shaft part and a radial part, the shaft part extends into the pump outer shell (7) from the outside of the pump outer shell (7), and then extends into the rotor cavity shell (16) after penetrating through holes on the other sides of the flow distribution inner shell, the pump shell (13) and the rotor cavity shell (16), the shaft part and the main shaft (3) are coaxially arranged but are not connected, the shaft part is connected with the radial part at the tail end extending into the rotor cavity shell (16), the radial part is perpendicular to the shaft part and extends from the end part of the shaft to the radial direction, and the shaft part and the radial part are connected to form an L shape;

the inner cavity of the rotor cavity shell (16) is internally provided with a left impeller (9) and a right impeller (22), the end part of the main shaft (3) extends into the pump outer shell (7) and penetrates through the shunting inner shell, the pump shell (13) and the end part of the rotor cavity shell (16) after passing through a through hole at one side to be coaxially and fixedly connected with the left impeller (9), the right impeller (22) is coaxially and movably arranged on the shaft part of the collecting pipe (17) through a water lubricating bearing (18), and the peripheral edges of the left impeller (9) and the right impeller (22) are fixedly connected to the inner peripheral surface of the rotor cavity shell (16), so that the rotor cavity shell (16), the left impeller (9) and the right impeller (22) form a whole and rotate around the shaft part of the main shaft (3) and the collecting pipe (17).

2. The novel shaftless silent magnetic transmission double-suction rotary shell pump as claimed in claim 1, wherein: a liquid inlet (10) is formed in the top end of the pump outer shell (7), gaps communicated with the liquid inlet (10) are formed between two ends of the shunting inner shell along the axial direction of the main shaft (3) and the inner wall of an inner cavity of the pump outer shell (7) respectively and used as two independent vertical flow channels, gaps are formed between the shaft part of the collecting pipe (17) and the main shaft (3) and between the shaft part of the shunting inner shell, the pump shell (13) and the through hole walls on two sides of the rotor cavity shell (16) respectively and used as a left horizontal flow channel (8) and a right horizontal flow channel (20), gaps are formed between the inner end surface of the rotor cavity shell (16) close to one side of the left impeller (9) and the left impeller (9), and gaps are formed between the inner end surface of the rotor cavity shell (16) close to one side of the right impeller (22) and used as a left annular flow channel and a right annular flow channel respectively;

the inner cavity part of a rotor cavity shell (16) between a left impeller (9) and a right impeller (22) is used as a rotor cavity (23), the outer ring parts of two annular flow channels corresponding to the left impeller (9) and the right impeller (22) are communicated with the rotor cavity (23) through hollow through grooves between the peripheral edges of the left impeller (9) and the right impeller (22) and the inner circumferential surface of the rotor cavity shell (16), and the inner ring parts of the two annular flow channels corresponding to the left impeller (9) and the right impeller (22) are communicated with two vertical flow channels through a left horizontal flow channel (8) and a right horizontal flow channel (20) corresponding to the shaft parts of a main shaft (3) and a collecting pipe (17) respectively.

3. The novel shaftless mute magnetic transmission double-suction rotary shell pump as claimed in claim 2, wherein: fluid flows into the two vertical flow channels at the front end and the rear end of the inner shunting shell along the axial direction of the main shaft (3) after flowing into the fluid from the fluid inlet (10), the two vertical flow channels respectively flow into the two annular flow channels corresponding to the left impeller (9) and the right impeller (22) after passing through the left horizontal flow channel (8) and the right horizontal flow channel (20), and then flow into the rotor cavity (23) through the hollow through grooves between the peripheral edges of the left impeller (9) and the right impeller (22) and the inner circumferential surface of the rotor cavity shell (16).

4. The novel shaftless silent magnetic transmission double-suction rotary shell pump as claimed in claim 1, wherein: the top surface of the shunting inner shell opposite to the liquid inlet (10) is provided with a ridge-shaped surface as an inlet section wall surface (11).

5. The novel shaftless silent magnetic transmission double-suction rotary shell pump as claimed in claim 1, wherein: the diameter part of the collecting pipe (17) is positioned in the rotor cavity (23), the tail end of the diameter part of the collecting pipe (17) is perpendicularly bent along the tangential direction to form a bent part, and the tangential direction of the bent part of the collecting pipe (17) is opposite to the tangential direction of an hour hand which is formed by the rotor cavity shell (16), the left impeller (9) and the right impeller (22) and rotates around the spindle (3) and the shaft part of the collecting pipe (17); a hollow channel is formed in the collecting pipe (17), the hollow channel is communicated with the bent part from the shaft part of the collecting pipe (17) through the radial part, two ends of the hollow channel respectively penetrate through the shaft part of the collecting pipe (17) and the end face of the bent part, and the port of the hollow channel on the shaft part of the collecting pipe (17) is used as a liquid outlet (21); the fluid in the rotor cavity (23) flows in through the hollow channel inlet on the end face of the bent part of the collecting pipe (17) and flows out from the hollow channel outlet on the end face of the shaft part of the collecting pipe (17).

6. The novel shaftless silent magnetic transmission double-suction rotary shell pump as claimed in claim 1, wherein: the middle part of the main shaft (3) penetrates out of the pump shell (7) and then is supported and sleeved in the bearing box (4) through the bearing (2), the bearing box (4) is filled with lubricating oil, the other end of the main shaft (3) is connected with the bearing box (4), and self-lubricating is carried out through the lubricating oil in the bearing box (4).

7. The novel shaftless silent magnetic transmission double-suction rotary shell pump as claimed in claim 6, wherein: the top of bearing box (4) seted up the oiling through-hole, install in the oiling through-hole oil plug (5), oil pointer (1) is installed to the bottom of bearing box (4).

8. The novel shaftless silent magnetic transmission double-suction rotary shell pump as claimed in claim 1, wherein: the rotor cavity shell (16), the left impeller (9) and the right impeller (22) are integrally cast.

9. The novel shaftless silent magnetic transmission double-suction rotary shell pump as claimed in claim 1, wherein: the rotor cavity shell (16) is in transmission connection with the pump shell (13) through magnetic force of the coil winding (14) and the permanent magnet steel (15), namely the coil winding (14) is electrified, a magnetic field generated by the coil winding (14) drives the permanent magnet steel (15) to rotate, and then the rotor cavity shell (16) is driven to rotate in the pump shell (13).

10. The application of the novel shaftless silent magnetic transmission double-suction rotary shell pump as claimed in any one of claims 1 to 9, which is characterized in that: the method is applied to fluid conveying in the fields of petrochemical industry, papermaking, food and the like.

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