CN206389207U - The horizontal flameproof motor of high temperature no-leakage pump - Google Patents

Abstract

The horizontal flameproof motor of high temperature no-leakage pump, belongs to high temperature oils circulation conveying apparatus field.It is characterized in that：Stator case（1）It is interior to be provided with oil-filled chamber, rotating shaft（18）One end and stator case（1）Between be provided with heat-proof device, stator case（1）Outside connects oil circulation cooling body by pipeline respectively（23）And pressure regulating device（3）.The utility model uses horizontal type structure, and the high temperature delivery temperature that sealing mechanism undertakes is shared in motor inner chamber full of oil by heat-proof device, and fills heavy oil inside heat-proof device, realizes good sealing by the pressure differential between two cavitys, it is to avoid leak.Thoroughly accomplish the pressure balance of oil pressure inside and outside motor, so as to thoroughly prevent leaking for the fluid in stator case, the conveying of high-temperature oil liquid can be realized, safety, flame proof can be accomplished again.

Description

Horizontal flameproof motor for high temperature non-leakage pump

technical field

The utility model relates to a horizontal explosion-proof motor for a high-temperature non-leakage pump, which belongs to the field of high-temperature oil circulation conveying equipment.

Background technique

High-temperature hot oil medium delivery pumps are widely used in petroleum and chemical industries to transport high-temperature flammable and explosive mediums. Once leakage occurs, it may cause a fire. At present, the motors of high-temperature hot oil medium delivery pumps use the motor shaft to protrude from the inner cavity of the motor, and are connected to the pump through a coupling. Therefore, a shaft seal device is required to prevent the hot oil medium from leaking out. The shaft seal device basically adopts a mechanical seal. However, the mechanical seal parts of the high-temperature hot oil medium delivery pump have been subjected to high temperature for a long time, resulting in a short service life, requiring regular maintenance and replacement, and high maintenance costs; It is easy to produce deformation and thermal cracks under high temperature conditions, and the elastic compensating element will lose its compensation ability under high temperature conditions, which will lead to the sudden failure of the mechanical seal, resulting in the leakage of hot oil medium, and the leakage of high temperature oil will easily cause oily, serious problems. Potential safety hazards seriously affect the safe operation of high-temperature hot oil medium delivery pumps. Furthermore, the unbalanced oil pressure in the motor is also likely to cause potential safety hazards in oil transmission.

Contents of the invention

The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art, to provide a horizontal explosion-proof high-temperature non-leakage pump with reasonable adjustment of oil pressure balance in the motor, safety explosion-proof, high-temperature oil delivery, and effective leakage prevention. type motor.

The technical solution adopted by the utility model to solve the technical problem is: the horizontal flameproof motor for the high-temperature non-leakage pump includes the stator casing, the stator winding fitted on the inner wall of the stator casing, and the rotor winding fitted through the rotating shaft in the stator casing , characterized in that: the stator housing is installed horizontally, an oil-filled chamber is provided inside the stator housing, a cooling water circulation chamber is provided on the outer ring of the oil-filled chamber, and both ends of the rotating shaft protrude from the stator housing, wherein There is a heat insulation device between one end and the stator housing. The outer side of the stator housing is connected to the oil circulation cooling mechanism and the pressure regulating mechanism respectively through pipelines. One end of the oil chamber and the output end are directly connected to the other end of the oil-filled chamber through the pipeline.

The utility model adopts a horizontal structure. The main body of the motor adopts a double-layer structure. The inner cavity is filled with oil, and the outer cavity is filled with cooling water. The pressure mechanism, through the oil circulation cooling mechanism, performs real-time heat exchange on the oil in the oil-filled cavity, and keeps the oil in the oil-filled cavity at a good working temperature; High temperature transmission temperature, and heavy oil is filled inside the heat insulation device, so that two kinds of oil pressure cavities are formed between the heat insulation device and the oil-filled cavity, and a good seal is achieved through the pressure difference between the two cavities to avoid leakage . Specifically, the oil pressure in the oil-filled cavity is flexibly adjusted in real time through the pressure regulating mechanism, so that the oil pressure is always slightly higher than the oil pressure in the heat insulation device, and the pressure balance of the internal and external oil pressure of the motor is completely achieved, thereby completely eliminating The leakage of the oil in the stator housing can not only realize the transportation of high-temperature oil, but also achieve safety and explosion-proof.

The pressure regulating mechanism includes a pressure storage tank and an outflow pipe of the pressure storage tank. The pressure storage tank communicates with the oil-filled cavity of the stator housing through the outflow pipe of the pressure storage tank. There is a reversing pressure regulating device. The top of the reversing pressure regulating device is connected to the liquid outlet at the bottom of the pressure storage tank. There are multiple pressure regulating check valves in the reversing pressure regulating device. At least one of the pressure regulating check valves The liquid inlet port is connected to the liquid outlet port, and the liquid outlet port of at least one pressure regulating check valve is connected to the liquid outlet port.

Only one pipeline is used to communicate between the pressure storage tank and the stator housing. Whether the oil pressure in the inner cavity of the stator housing is depressurized or pressurized, the flow is realized through the outlet pipe of the pressure storage tank. Pressure device, and multiple check valves with different flow directions are set in the reversing pressure regulating device, and the reversing pressure regulating device is used to control and flexibly adjust the oil pressure. The circulating oil with pressure can be In the reversing pressure regulating device, the flow direction of the one-way valve can freely select the inlet and outlet to realize flexible adjustment of oil pressure, and both pressure relief and boosting can be uniformly adjusted through the reversing pressure regulating device, which simplifies the structure of the equipment itself and saves The installation space of the equipment.

The liquid outlets are three arranged side by side at the bottom of the pressure storage tank, the pressure regulating one-way valves are arranged vertically, and the flow direction of at least one pressure regulating one-way valve is downward flow. Utilizing the above-mentioned reversing pressure regulating device and adopting the vertical setting of the pressure regulating check valve can keep the pressure regulating check valve in the best working state to the greatest extent, improve the working efficiency of the check valve and prolong the service life.

The pressure regulating check valve adopts two kinds of check valves with different flow directions. The pressure of 20# heavy diesel oil at the heat shield is about 0.1MPa, and the internal pressure of the oil-filled chamber of the stator housing is about 0.15MPa, and the pressure in the oil-filled chamber of the stator housing is always maintained. Greater than the external pressure, when the internal pressure of the oil-filled chamber of the stator housing is greater than 0.15, the flow direction is to open the one-way pressure regulating valve towards the pressure storage tank to realize pressure relief. Another one-way valve in the flow direction returns oil to the oil-filled cavity of the stator housing to achieve pressurization.

The oil circulation cooling mechanism includes a heat exchange input pipe, a heat exchanger and a heat exchange return pipe, and the two ends of the heat exchanger are respectively connected to the two ends of the oil-filled chamber through the heat exchange input pipe and the heat exchange return pipe. The heat exchange return pipe is provided with a filter. By using a filter, the dirt particles contained in the oil can be filtered to ensure the working condition of the circulating oil.

The heat exchanger is installed horizontally on the top of the stator housing through a bracket, and is arranged parallel to the stator housing. Placing the heat exchanger and the stator housing in the same horizontal direction can prolong the heat exchange time of the oil in the heat exchange process to the greatest extent, so as to improve the heat exchange efficiency in the oil circulation heat exchange process.

The heat insulation device is a heat shield, and the heat shield is set on the end of the rotating shaft protruding outside the stator housing. The heat shield includes an inner connection part, a middle oil passage part and an outer end isolation part; the inner part of the middle oil passage part There is a circulation drainage device between the shaft and the rotating shaft, and the outer side of the circulation impeller is provided with a heat exchange output channel radially opened on the middle oil passage, through which the heat exchange output channel is connected to the oil circulation cooling mechanism; the inner connection part and the middle oil passage There are oil flow holes in the inner cavity that can be drained through the circulation drainage device.

The outer ring of the heat shield is provided with a cooling liquid circulation cavity.

The inner connection part is set in a tapered shape, and a platinum thermal resistance is arranged between the inner side of the inner connection part and the rotating shaft. The working temperature of the bearings, stator windings and rotor windings installed in the stator housing can be tested in real time through the platinum thermal resistance, which is convenient for adjusting the heat transfer rate in time.

The circulation drainage device is a circulation impeller set on the rotating shaft.

The other end of the rotating shaft protruding from the stator housing is provided with a displacement detection device, the displacement detection device includes a direction finding disc and a radial displacement detection mechanism respectively arranged on the axial end face of the direction finding disc and the axial displacement of the radial end face In the control mechanism, the direction finding disc is set on the end of the rotating shaft and can rotate synchronously with the rotating shaft. The rotating shaft of the motor extends out of the stator housing, and a steering wheel for radial and axial detection is added at the end to facilitate real-time detection of axial and radial displacement changes and stress changes.

Compared with the prior art, the beneficial effects of the utility model are: the utility model adopts a horizontal structure, the main body of the motor adopts a double-layer structure, the inner cavity is filled with oil, and the outer cavity is filled with cooling water. An oil circulating cooling mechanism and a pressure regulating mechanism connected to the oil-filled chamber are arranged on the outside of the oil-filled chamber. Good working temperature; moreover, the high-temperature delivery temperature borne by the sealing mechanism is shared by the heat insulation device, and heavy oil is filled inside the heat insulation device, so that two kinds of oil pressure chambers are formed between the heat insulation device and the oil-filled chamber. The pressure difference between the two cavities achieves a good seal to avoid leakage. Specifically, the oil pressure in the oil-filled cavity is flexibly adjusted in real time through the pressure regulating mechanism, so that the oil pressure is always slightly higher than the oil pressure in the heat insulation device, and the pressure balance of the internal and external oil pressure of the motor is completely achieved, thereby completely eliminating The leakage of the oil in the stator housing can not only realize the transportation of high-temperature oil, but also achieve safety and explosion-proof.

Description of drawings

Figure 1 is a schematic diagram of the front view of a horizontal flameproof motor for a high temperature non-leakage pump.

Figure 2 is a schematic side view of a horizontal flameproof motor for a high temperature non-leakage pump.

FIG. 3 is a schematic top view of FIG. 2 .

Among them, 1. Stator housing 2, heat shield 201, inner connection part 202, middle oil passage part 203, outer end isolation part 204, circulation impeller 205, platinum thermal resistance 206, heavy oil circulation cavity 207, heat exchange output channel 208, inner cavity oil circulation hole 209, coolant circulation cavity 3, pressure regulating mechanism 301, pressure storage tank 302, pressure storage tank outflow pipe 303, reversing pressure regulating device 304, pressure regulating check valve 305, liquid outlet 4 , power cable junction box 401, sealing pressure plate 402, cable sealing pressure plate 5, low-voltage terminal 6, inner end bearing seat 7, thrust bearing seat 8, connecting bolt 9, thrust plate 10, thrust bearing 11, key 12, tight Solid nut 13, first mechanical seal 14, direction measuring disc 15, mechanical seal box 16, cooling water circulation cavity 17, rotor winding 18, rotating shaft 19, control cable junction box 20, stator winding 21, second mechanical seal 22, bracket 23. Oil circulating cooling mechanism 2301, heat exchange input pipe 2302, heat exchanger 2303, heat exchange return pipe 2304, filter.

detailed description

Fig. 1 ~ 3 is the preferred embodiment of the present utility model, below in conjunction with accompanying drawing 1 ~ 3 the utility model is described further.

Referring to attached drawings 1 to 3: a horizontal flameproof motor for a high-temperature non-leakage pump, including a stator casing 1, a stator winding 20 fitted on the inner wall of the stator casing 1, and a rotor winding 17 fitted in the stator casing 1 through a rotating shaft 18, The stator housing 1 is installed horizontally. The stator housing 1 is provided with an oil-filled chamber. The outer ring of the oil-filled chamber is provided with a cooling water circulation chamber 16. Both ends of the rotating shaft 18 protrude from the stator housing 1. The rotating shaft 18 includes There is a heat insulation device between one end and the stator housing 1, the outer side of the stator housing 1 is respectively connected to the oil circulation cooling mechanism 23 and the pressure regulating mechanism 3 through pipelines, and the input end of the oil circulation cooling mechanism 23 is connected through the inner side of the heat insulation device One end of the oil-filled chamber in the stator housing 1, the output end is directly connected to the other end of the oil-filled chamber through a pipeline, and a sealing mechanism for isolating the oil-filled chamber is set on the outside of the heat insulation device, and a heavy oil filling is provided between the sealing mechanism and the heat insulation device. The heavy oil flow chamber 206 is the second mechanical seal 21 as the sealing mechanism.

The pressure regulating mechanism 3 includes a pressure storage tank 301 and a pressure storage tank outflow pipe 302. The pressure storage tank 301 communicates with the oil-filled chamber of the stator housing 1 through the pressure storage tank outflow pipe 302, and the pressure storage tank 301 and the pressure storage tank flow out A reversing pressure regulating device 303 is provided between the pipes 302, and the top of the reversing pressure regulating device 303 is connected with the liquid outlet 305 at the bottom of the pressure storage tank 301, and a plurality of pressure regulating check valves are arranged in the reversing pressure regulating device 303 304, wherein the liquid inlet end of at least one pressure regulating check valve 304 is connected to the liquid outlet 305, and the liquid outlet end of at least one pressure regulating check valve 304 is connected to the liquid outlet 305. There are three liquid outlets 305 arranged side by side at the bottom of the pressure storage tank 301 , the pressure regulating check valve 304 is vertically arranged, and the flow direction of at least one pressure regulating check valve 304 is downward flow.

The oil circulation cooling mechanism 23 includes a heat exchange input pipe 2301, a heat exchanger 2302 and a heat exchange return pipe 2303. The two ends of the heat exchanger 2302 are respectively connected to the two ends of the oil-filled cavity through the heat exchange input pipe 2301 and the heat exchange return pipe 2303. , The heat exchange return pipe 2303 is provided with a filter 2304 . The heat exchanger 2302 is installed horizontally on the top of the stator housing 1 through the bracket 22 , and is arranged in parallel with the stator housing 1 .

The heat insulation device is a heat shield 2, and the heat shield 2 is set on the end of the rotating shaft 18 protruding outside the stator housing 1. The heat shield 2 includes an inner connection part 201, a middle oil passage part 202 and an outer end isolation part 203; A circulation drainage device is provided between the inner side of the middle oil passage part 202 and the rotating shaft 18, and the outer side of the circulation impeller 204 is provided with a heat exchange output channel 207 radially opened on the middle part oil passage part 202, and the oil circulation is communicated through the heat exchange output passage 207. The cooling mechanism 23 ; the inner connecting portion 201 and the middle oil passage portion 202 are respectively provided with an inner cavity oil circulation hole 208 which can be drained through a circulation drainage device. The outer ring of the heat shield 2 is provided with a cooling liquid circulation cavity 209 . The inner connecting portion 201 is configured in a tapered shape, and a platinum thermal resistor 205 is disposed between the inner connecting portion 201 and the rotating shaft 18 . The circulation drainage device is a circulation impeller 204 sleeved on the rotating shaft 18 .

The other end of the rotating shaft 18 protruding from the stator housing 1 is provided with a displacement detection device, including a direction finding disc 14, a radial displacement detection mechanism and an axial displacement control mechanism respectively arranged on the axial end surface of the direction finding disc 14 , The direction finding disc 14 is sleeved on the end of the rotating shaft 18, and can rotate synchronously with the rotating shaft 18. A rotating shaft 18 is fixedly connected to the center of the direction measuring disc 14 , and a first mechanical seal 13 is provided on one side of the inner end surface of the direction finding disc 14 . Specifically, the first mechanical seal 13 is installed on the other end of the rotating shaft 18 protruding from the stator housing 1. An axial thrust mechanism is provided on the rotating shaft 18 inside the first mechanical seal 13, and an axial thrust mechanism is provided outside the shaft hole of the axial thrust mechanism. There is an organic cover 15, and the direction finding disc 14 is installed in the machine cover 15.

The axial thrust mechanism includes the inner end bearing seat 6 installed axially side by side, the thrust bearing 10, the thrust plate 9 and the thrust bearing seat 7 fixed by the key 11, and the thrust bearing seat 6 and the thrust bearing seat 7 are installed between the inner end bearing seat 6 and the thrust bearing seat 7. disc 9, and the outer edge is fixed by connecting bolts, a thrust bearing 10 is installed on the inner end bearing seat 6, and the thrust bearing 10 is installed between the thrust disc 9 and the inner end bearing seat 6, and the other end surface of the thrust disc 9 is provided with a tight Solid nut 12. Set the thrust bearing 10 and the thrust disc 9 to form a friction pair, and bear the axial force generated by the pump.

As shown in Figure 1, the right end of the stator housing 1 is fixedly provided with an inner end bearing seat 6 and a thrust bearing seat 7, and the inner end bearing seat 6 and the thrust bearing seat 7 are fixedly connected to the end of the stator housing 1 through connecting bolts 8, and the inner A thrust plate 9 and a thrust bearing 10 are installed between the end bearing seat 6 and the thrust bearing seat 7, the thrust plate 9 is installed on the right side of the inner end bearing seat 6, and the right side of the thrust bearing 10 is provided with a fastening nut 12, fastened The end of the rotating shaft 18 on the right side of the nut 12 is sequentially installed with the first mechanical seal 13 and the direction finding disc 14 from left to right, the outer cover of the first mechanical seal 13 and the direction finding disc 14 has an organic sealing box 15, and the mechanical sealing box 15 is fixedly arranged At the thrust bearing seat 7 central shaft hole.

Working principle and working process:

The electric motor of the utility model transports a medium at about 350 degrees Celsius, and the oil in the oil-filled cavity is not allowed to leak outward. If the high-temperature oil leaks out, it will cause oil combustion, which can leak to the inside of the motor. 20# heavy diesel oil is added inside the heat shield 2, and the inside of the stator housing 1 is filled with oil, which is isolated from the outside. The thrust bearing is provided with a thrust disc to form a friction pair to withstand the axial force generated by the pump. The rightmost end of the motor and the rotating shaft 18 extend out of the stator housing 1, and a direction measuring disc 14 for axial radial and axial detection is added at the end. In the pipeline, a filter 2302 is used to filter dirt particles contained in the oil.

The pressure storage tank 301 is connected to one side of the oil-filled cavity, and its main function is to maintain a stable pressure difference between the stator casing 1 and the pumped high-temperature hot oil medium cavity. The pressure regulating mechanism 3 contains two kinds of pressure regulating one-way valves 304 with different flow directions. The pressure of 20# heavy diesel oil in the heat shield 2 is about 0.1MPa, and the internal pressure of the stator casing 1 is about 0.15MPa. The pressure is greater than the external pressure. When the internal pressure of the stator housing 1 is greater than 0.15, the pressure valve is opened to the pressure regulating check valve 304 of the pressure storage tank 301 to release the pressure. When the internal pressure of the stator housing 1 is less than 0.05, the pressure regulating mechanism The other kind of pressure regulating check valve 304 that flows out of the pressure accumulator tank 301 in 3 is opened to return oil to the stator housing 1 .

During normal operation, the oil in the stator housing 1 is boosted by the circulation impeller 204 that rotates with the rotating shaft 18, enters the heat exchanger 2302 through the heat exchange input pipe 2301 for heat exchange, and then returns to the heat exchange return pipe 2303 to In the stator housing 1, the oil flows through the filter 2304 during the return process to cool and filter the oil to complete its own forced circulation to take away the heat generated by the interaction of the electromagnetic windings and ensure that the oil temperature in the oil-filled cavity is within the allowable range Inside.

The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model in other forms. Any skilled person who is familiar with this profession may use the technical content disclosed above to change or remodel it into an equivalent change. Equivalent embodiment. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model without departing from the content of the technical solution of the utility model still belong to the protection scope of the technical solution of the utility model.

Claims (10)

1. Horizontal flameproof motor for high-temperature non-leakage pumps, including the stator housing (1), the stator winding (20) set on the inner wall of the stator housing (1), and the rotating shaft (18) set inside the stator housing (1) The rotor winding (17) is characterized in that: the stator housing (1) is horizontally installed, the stator housing (1) is provided with an oil-filled cavity, and the outer ring of the oil-filled cavity is provided with a cooling water circulation Cavity (16), one end of the rotating shaft (18) and the stator housing (1) are provided with a heat insulation device, and the outside of the stator housing (1) is respectively connected to the oil circulation cooling mechanism (23) and the pressure regulating mechanism ( 3), the input end of the oil circulation cooling mechanism (23) is connected to one end of the oil-filled chamber in the stator housing (1) through the inner side of the heat insulation device, and the output end is directly connected to the other end of the oil-filled chamber through the pipeline. 2. The horizontal flameproof motor for high-temperature non-leakage pumps according to claim 1, characterized in that: the pressure regulating mechanism (3) includes a pressure storage tank (301) and a pressure storage tank outflow pipe (302) , the pressure storage tank (301) communicates with the oil-filled chamber of the stator housing (1) through the pressure storage tank outflow pipe (302), and there is a The reversing pressure regulating device (303), the top of the reversing pressure regulating device (303) is connected with the liquid outlet (305) at the bottom of the pressure storage tank (301), and the reversing pressure regulating device (303) is equipped with multiple regulators pressure check valve (304), wherein the liquid inlet port of at least one pressure regulating check valve (304) is connected to the liquid outlet (305), and the liquid outlet port of at least one pressure regulating check valve (304) is connected to the liquid outlet ( 305). 3. The horizontal flameproof motor for high-temperature non-leakage pumps according to claim 2, characterized in that: the liquid outlets (305) are three arranged side by side at the bottom of the pressure storage tank (301), so The pressure regulating one-way valve (304) described above is arranged vertically, and the flow direction of at least one pressure regulating one-way valve (304) is downward outflow. 4. The horizontal explosion-proof motor for high-temperature non-leakage pumps according to claim 1, characterized in that: the oil circulation cooling mechanism (23) includes a heat exchange input pipe (2301), a heat exchanger (2302 ) and the heat exchange return pipe (2303), the two ends of the heat exchanger (2302) are respectively connected to the two ends of the oil-filled cavity through the heat exchange input pipe (2301) and the heat exchange return pipe (2303), and the two ends of the heat exchange A filter (2304) is provided on the heat return pipe (2303). 5. The horizontal flameproof motor for high-temperature non-leakage pumps according to claim 4, characterized in that: the heat exchanger (2302) is horizontally installed on the stator housing (1 ) to form a parallel arrangement with the stator housing (1). 6. The horizontal explosion-proof motor for high-temperature non-leakage pumps according to claim 1, characterized in that: the heat insulation device is a heat shield (2), and the heat shield (2) is set outside and protrudes from the stator The end of the rotating shaft (18) outside the housing (1), the heat shield (2) includes the inner connection part (201), the middle part oil passage part (202) and the outer end isolation part (203); the middle part oil passage part (202 ) and the rotating shaft (18) are provided with a circulation drainage device, and the outside of the circulation impeller (204) is provided with a heat exchange output channel (207) radially opened on the middle oil passage (202). Through the heat exchange output channel ( 207) Connected to the oil circulation cooling mechanism (23); the inner connection part (201) and the middle oil passage part (202) are respectively provided with inner cavity oil circulation holes (208) that can be drained through the circulation drainage device. 7. The horizontal explosion-proof motor for high-temperature non-leakage pumps according to claim 6, characterized in that: the outer ring of the heat shield (2) is provided with a cooling liquid circulation cavity (209). 8. The horizontal flameproof motor for high-temperature non-leakage pumps according to claim 6, characterized in that: the inner connecting part (201) is conical, and the inner connecting part (201) is connected to the rotating shaft (18 ) with a platinum thermal resistance (205). 9. The horizontal flameproof motor for high-temperature non-leakage pumps according to claim 6, characterized in that: the circulation drainage device is a circulation impeller (204) set on the rotating shaft (18). 10. The horizontal flameproof motor for high-temperature non-leakage pumps according to claim 1, characterized in that: the other end of the rotating shaft (18) protruding from the stator housing (1) is provided with a displacement detection device, The displacement detection device includes a direction finding disc (14), a radial displacement detection mechanism and an axial displacement control mechanism respectively arranged on the axial end surface of the direction finding disc (14), and the direction finding disc (14) is set on the rotating shaft ( 18) end, and can rotate synchronously with rotating shaft (18).