CN213478678U

CN213478678U - Reverse circulation shield pump with connector

Info

Publication number: CN213478678U
Application number: CN202022445604.0U
Authority: CN
Inventors: 李智; 李信永; 刘兴国; 徐光俊
Original assignee: Shandong Luchen Pump Co ltd
Current assignee: Shandong Luchen Pump Co ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-06-18
Anticipated expiration: 2030-10-28

Abstract

The utility model relates to a take reverse circulation canned motor pump of connector, it includes pump unit, motor device and connector, motor device includes the stator and rotates the rotor of connecting in the stator, the circulation leakage fluid dram has been seted up to stator one end, the connecting hole with intercommunication in the stator is seted up to the connector, two graphite bearings that are coaxial setting of stator both ends fixedly connected with, the rotor rotates with graphite bearing to be connected, graphite bearing inner wall sets up the intercommunication groove that is spiral setting, intercommunication groove one end and connecting hole intercommunication, the other end and the inside intercommunication of stator. This application has extension graphite bearing life's effect.

Description

Reverse circulation shield pump with connector

Technical Field

The application relates to the field of canned motor pumps, in particular to a reverse circulation canned motor pump with a connecting body.

Background

The canned pump is a sealless pump, the pump and the drive motor are sealed in a pressure vessel filled with the pumped medium, the pressure vessel has only static seals, and a set of electric wires provides a rotating magnetic field and drives the rotor. The structure eliminates a rotating shaft sealing device of the traditional centrifugal pump, so that the leakage can be completely avoided.

The patent application with the publication number of CN105909534A of the invention in China discloses a canned pump, which comprises a pump base, wherein the pump base is fixedly connected with a shell, a lower bearing seat is arranged at the lower end inside the shell, an upper bearing seat is arranged at the upper end inside the shell, a graphite bearing is arranged between the upper bearing seat and the lower bearing seat, the graphite bearing is rotatably connected with a rotating shaft, a rotor assembly is arranged on the rotating shaft, a rotor shielding sleeve is arranged on the rotor assembly, a stator assembly is arranged inside the shell and is nested on the rotor assembly, a stator shielding sleeve is arranged on the stator assembly, a balance end cover is nested on the lower bearing seat, a drain valve is arranged at the top end of the shell, an inner circulating pipe and an outer circulating pipe are arranged on the shell in parallel, one.

In view of the above-mentioned related art, when a liquid is transported, when there is a particle impurity in the liquid, the impurity is liable to scratch the graphite bearing, and the inventors believe that the canned motor pump is liable to cause a defect of short service life of the graphite bearing when the liquid with the solid impurity is pumped.

SUMMERY OF THE UTILITY MODEL

In order to alleviate the short defect of graphite bearing life, the application provides a take reverse circulation canned motor pump of connector.

The application provides a take contrary circulation canned motor pump of connector adopts following technical scheme:

a reverse circulation canned motor pump with a connector comprises a pump device, a motor device and a connector, wherein the motor device comprises a stator and a rotor rotationally connected with the stator, a circular liquid discharge port is formed in one end of the stator, the connector is fixedly connected with one end, away from the circular liquid discharge port, of the stator, a connecting hole communicated with the interior of the stator is formed in the connector, two graphite bearings coaxially arranged are fixedly connected with two ends of the stator, the stator is rotationally connected with the graphite bearings, a communicating groove spirally arranged is formed in the inner wall of each graphite bearing, the communicating groove spirally extends into the stator along the rotation direction of the rotor, one end of the communicating groove is communicated with the connecting hole, the other end of the communicating groove is communicated with the interior of the stator, the pump device comprises a pump body fixedly connected with the connector and an impeller rotationally connected into the pump body, the pump body is provided with a communicating flow passage communicated with the liquid outlet, the other end of the communicating flow passage is communicated with the connecting hole, and one end of the rotor penetrates through the connecting hole and is coaxially and fixedly connected with the impeller.

By adopting the technical scheme, the motor device works, and the impeller is driven to rotate by the rotor, so that liquid is pumped. Part of liquid of the liquid outlet enters the connecting hole through the communicating flow passage, then enters the communicating groove of the graphite bearing along the connecting hole, enters the motor through the communicating groove, and finally is discharged from the circulating liquid outlet. Because liquid can get into inside the stator along the intercommunication groove of spiral when flowing through graphite bearing, make the granule in the liquid pass through graphite bearing through the intercommunication groove, reduce the narrow and small clearance department that gets into between graphite bearing and the rotor, reduce graphite bearing's wearing and tearing to promote graphite bearing's life.

Optionally, coaxial fixedly connected with solid-liquid separation structure in the connector, solid-liquid separation structure includes sleeve and coaxial fixed connection auger blade in the sleeve, the sleeve is worn to locate by the rotor is coaxial, a plurality of holding tanks that are used for holding particle impurity are seted up to the sleeve.

Through adopting above-mentioned technical scheme, when liquid enters solid-liquid separation structure, liquid began to rotate under the effect of auger blade, and the granule that the quality is increaseed is got rid of to the sleeve lateral wall under the effect of centrifugal force to in getting into the holding tank, reduce the granule with graphite bearing contact, reduce graphite bearing's wearing and tearing.

Optionally, the holding tank is the spiral arrangement along auger blade, the holding tank is the slope setting, and its open-ended one end inclines to telescopic central direction, and the other end inclines to keeping away from telescopic central direction, the holding tank is towards the opposite direction of liquid flow direction.

Through adopting above-mentioned technical scheme for in the granule got into the holding tank more easily, promote solid-liquid separation's effect.

Optionally, the sleeve includes shell and the neck bush of coaxial fixed connection in the shell, auger blade fixed connection is in the neck bush inner wall, the holding tank is seted up in the neck bush and runs through the neck bush, the holding tank diapire is the inner wall of shell.

Through adopting above-mentioned technical scheme, during the clearance, with shell and neck bush separation, then wash the neck bush to can clear up out the impurity in the holding tank.

Optionally, an internal thread is formed at one end of the inner wall of the sleeve, threads of the internal thread are flush with the inner wall of the sleeve, an external thread is formed on the outer wall of one end of the inner bushing, threads of the external thread protrude out of the outer wall of the inner bushing, and the sleeve is in threaded connection with the inner bushing.

Through adopting above-mentioned technical scheme, connection structure between sleeve and the interior bush is simple and stable to sleeve and interior bush are convenient for disassemble, are convenient for wash the holding tank.

Optionally, the inner wall of the sleeve and the outer wall of the inner bushing have tapers, one end of the inner wall of the sleeve, which is close to the internal thread, is a large end face, and one end of the outer wall of the inner bushing, which is close to the external thread, is a large end face.

Through adopting above-mentioned technical scheme, sleeve and interior bush screw thread are screwed the back, and both can closely laminate more, promote sleeve and interior bush connection structure's stability, can sleeve and interior bush axial displacement relatively when disassembling, because telescopic inner wall and interior bush outer wall have the tapering, so can have an enlarged clearance behind both axial displacement relatively, alleviate sleeve and interior bush by the dead condition of granule card in the holding tank.

Optionally, the neck bush is provided with a plurality of liquid drainage holes, the liquid drainage holes are arranged in an inclined manner, one end of each liquid drainage hole is communicated with the containing groove, and the other end of each liquid drainage hole faces to the direction of fluid flow.

Through adopting above-mentioned technical scheme, the liquid that gets into in the holding tank can be followed the outage and discharged, and more liquid can flow into the holding tank from the opening of holding tank to promote the separation effect of solid-liquid separation structure.

Optionally, the connector includes a cylindrical connecting portion, the two axial ends of the connecting portion are both fixedly connected with a connecting flange coaxially, one of the connecting flange is fixedly connected with the pump body through a bolt, and the other of the connecting flange is fixedly connected with the stator through a bolt.

Through adopting above-mentioned technical scheme, be convenient for install the connector.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the inner wall of the graphite bearing is provided with a spirally arranged communicating groove, the communicating groove spirally extends into the stator along the rotation direction of the rotor, and liquid can enter the stator along the spirally arranged communicating groove when flowing through the graphite bearing, so that particles in the liquid can pass through the graphite bearing through the communicating groove, the particles can enter a narrow gap between the graphite bearing and the rotor, the abrasion of the graphite bearing is reduced, and the service life of the graphite bearing is prolonged;

2. coaxial fixedly connected with solid-liquid separation structure in the connector, the solid-liquid separation structure includes the auger blade in sleeve and the coaxial fixedly connected with sleeve, the sleeve is worn to locate to the stator is coaxial, a plurality of holding tanks that are used for holding particle impurity are seted up to the sleeve, when liquid enters solid-liquid separation structure, liquid is rotatory under auger blade's effect, the granule that the quality is enlarged gets rid of to the sleeve lateral wall under the effect of centrifugal force, and in getting into the holding tank, reduce the granule with graphite bearing contact, reduce graphite bearing's wearing and tearing.

3. The sleeve includes that shell and coaxial fixed connection run through the interior bush in the shell, and the holding tank is seted up in the interior bush and runs through the interior bush, and the holding tank diapire is the inner wall of shell, during the clearance, separates shell and interior bush, then washes the interior bush to can clear up the impurity in the holding tank out.

Drawings

FIG. 1 is a schematic structural diagram for showing the whole of the embodiment of the present application;

FIG. 2 is a schematic cross-sectional view illustrating an internal structure according to an embodiment of the present application;

FIG. 3 is a schematic axial cross-sectional view of a solid-liquid separation structure according to an embodiment of the present application;

fig. 4 is an axial sectional view schematically showing a solid-liquid separation structure according to an embodiment of the present application.

Description of reference numerals: 100. a pump device; 101. a motor device; 102. a linker; 103. a stator; 104. a rotor; 105. a base; 106. a graphite bearing; 107. a circulating liquid discharge port; 108. a connecting portion; 109. a connecting flange; 110. a pump body; 111. an impeller; 112. a liquid inlet; 113. a liquid outlet; 114. a flow passage is communicated; 115. a communicating groove; 116. connecting holes; 117. a solid-liquid separation structure; 118. a sleeve; 119. a screw blade; 120. accommodating grooves; 121. a drain hole; 122. a housing; 123. an inner lining.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a reverse circulation canned motor pump with a connecting body. Referring to fig. 1, the canned motor pump includes a pump unit 100, a motor unit 101, and a connection body 102. The connecting body 102 is fixedly connected to one end of the motor device 101, and the pump device 100 is fixedly connected to one end of the connecting body 102 away from the motor device 101. The motor means 101 is used to power the pump means 100, and the pump means 100 is used to pump a liquid.

Referring to fig. 2, the motor apparatus 101 includes a stator 103, a rotor 104, and a base 105. The stator 103 has a cylindrical shape, and a side wall thereof is welded to the base 105. A cavity for receiving the rotor 104 is formed in the stator 103. Graphite bearings 106 are coaxially and fixedly connected to both ends of the stator 103, and the rotor 104 is rotatably connected to the stator 103 through the graphite bearings 106. One end of the stator 103 is provided with a circulating liquid outlet 107, and the connecting body 102 is fixedly connected to one end of the stator 103 far away from the circulating liquid outlet 107.

Referring to fig. 2, the connecting body 102 includes a cylindrical connecting portion 108, connecting flanges 109 are coaxially and integrally formed at both axial ends of the connecting portion 108, one of the connecting flanges 109 is fixedly connected to the pump apparatus 100 by bolts, and the other connecting flange 109 is fixedly connected to the stator 103 by bolts. The connecting body 102 is coaxially provided with a connecting hole 116 for the rotor 104 to penetrate through, one end of the rotor 104 penetrates through the connecting hole 116 and is connected with the pump device 100, and the rotor 104 rotates to drive the pump device 100 to pump liquid.

Referring to fig. 2, the pump apparatus 100 includes a pump body 110 and an impeller 111. The pump body 110 is connected to the connection flange 109 by bolts. The pump body 110 is provided with a liquid inlet 112 and a liquid outlet 113. The impeller 111 is rotatably connected to the inside of the pump body 110, and one end of the rotor 104 passing through the connection hole 116 passes through the pump body 110 and is coaxially and fixedly connected with the impeller 111. The motor device 101 works to drive the impeller 111 to rotate through the rotor 104, so as to pump the liquid.

Referring to fig. 2, the pump body 110 is formed with a communication flow passage 114 communicating with the liquid outlet 113, and the other end of the communication flow passage 114 communicates with a connection hole 116. When the pump works, part of liquid in the liquid outlet 113 enters the connecting hole 116 through the communicating flow passage 114, then flows through the graphite bearing 106 along the connecting hole 116 to enter the stator 103, and finally is discharged from the circulating liquid outlet 107, and the liquid takes away heat generated in the working process of the stator 103 and the rotor 104 when flowing out of the motor device 101.

Referring to fig. 3, when particle impurities exist in the liquid, the impurities easily scratch the graphite bearing 106, so that the service life of the graphite bearing 106 is shortened, and in order to alleviate the problem that the graphite bearing 106 is easily scratched, the inner wall of the graphite bearing 106 is provided with a spiral communication groove 115. The communication groove 115 extends spirally into the stator 103 along the rotation direction of the rotor 104, and one end of the communication groove 115 communicates with the connection hole 116 and the other end communicates with the inside of the stator 103. Because the liquid will enter the stator 103 along the spiral communicating groove 115 when flowing through the graphite bearing 106, the particles in the liquid can pass through the graphite bearing 106 through the communicating groove 115, and prevent impurities from entering the narrow gap between the graphite bearing 106 and the rotor 104, thereby reducing the abrasion of the graphite bearing 106 and further prolonging the service life of the graphite bearing 106.

Referring to fig. 3, in order to further reduce the amount of particulate impurities in the liquid flowing through the graphite bearing 106, a solid-liquid separation structure 117 is installed in the connection body 102.

Referring to fig. 3, the solid-liquid separation structure 117 includes a sleeve 118 and auger blades 119. The sleeve 118 is coaxially and fixedly connected in the connecting body 102, and the auger blade 119 is coaxially welded in the sleeve 118.

Referring to fig. 3 and 4, the sleeve 118 is formed with a plurality of receiving grooves 120 for receiving the particulate impurities, and the receiving grooves 120 are spirally arranged along the auger blade 119. The holding tank 120 is provided in an inclined manner, and has an opening with one end inclined toward the center of the sleeve 118 and the other end inclined away from the center of the sleeve 118, and the opening of the holding tank 120 is directed in the opposite direction to the liquid flow direction. When liquid enters the solid-liquid separation structure 117, the liquid rotates under the action of the auger blades 119, and particles with increased mass are thrown to the side wall of the sleeve 118 under the action of centrifugal force and enter the accommodating groove 120, so that particles contacting with the graphite bearing 106 are reduced, and the abrasion of the graphite bearing 106 is reduced.

Referring to fig. 3 and 4, the sleeve 118 has a plurality of drain holes 121, and the drain holes 121 are disposed in an inclined manner. The drain hole 121 has one end communicating with the housing groove 120 and the other end facing the fluid flow direction. The aperture of the liquid discharge holes 121 is smaller than the size of the solid particles, so that the liquid entering the holding tank 120 can be discharged from the liquid discharge holes 121, and more liquid can flow into the holding tank 120 from the opening of the holding tank 120, thereby improving the separation effect of the solid-liquid separation structure 117.

Referring to fig. 3 and 4, the sleeve 118 includes an outer shell 122 and an inner liner 123 coaxially fixedly attached within the outer shell 122. An internal thread is formed in one end of the inner wall of the shell 122, and threads of the internal thread are flush with the inner wall of the shell 122. The outer wall of one end of the inner liner 123 is provided with an external thread, the thread of the external thread protrudes out of the outer wall of the inner liner 123, and the outer shell 122 is in threaded connection with the inner liner 123. The inner wall of the outer shell 122 and the outer wall of the inner bushing 123 have tapers, one end, close to the internal thread, of the inner wall of the outer shell 122 is a large end face, one end, close to the external thread, of the outer wall of the inner bushing 123 is a large end face, and after the outer shell 122 and the inner bushing 123 are screwed tightly, the outer shell 122 and the inner bushing 123 can be attached more closely, so that the stability of the connection structure of the sleeve 118 and the inner bushing 123.

Referring to fig. 3 and 4, auger blade 119 is fixedly attached to the inner wall of inner liner 123. The accommodating groove 120 and the liquid discharge hole 121 are opened in the inner liner 123. The inner liner 123 is penetrated through the receiving groove 120, and the bottom wall of the receiving groove 120 is the inner wall of the outer shell 122. When cleaning, the outer casing 122 and the inner liner 123 are separated, and then the inner liner 123 is washed, and impurities in the accommodating groove 120 can be cleaned out.

The implementation principle of the reverse circulation canned motor pump with the connector in the embodiment of the application is as follows: the motor device 101 works to drive the impeller 111 to rotate through the rotor 104, so as to pump the liquid. Part of the liquid in the liquid outlet 113 enters the connecting hole 116 through the connecting flow passage 114 and passes through the solid-liquid separation structure 117. The solid-liquid separation structure 117 separates a part of the impurities with increased mass, and the filtered liquid enters the communicating groove 115 of the graphite bearing 106 along the connecting hole 116, enters the motor through the communicating groove 115, and is finally discharged from the circulating liquid discharge port 107. Because the liquid will enter the stator 103 along the spiral communicating groove 115 when flowing through the graphite bearing 106, the particles in the liquid can pass through the graphite bearing 106 through the communicating groove 115, thereby reducing the narrow gap between the graphite bearing 106 and the rotor 104, reducing the abrasion of the graphite bearing 106, and further prolonging the service life of the graphite bearing 106.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a take contrary circulation canned motor pump of connector which characterized in that: the pump device comprises a pump device (100), a motor device (101) and a connecting body (102), wherein the motor device (101) comprises a stator (103) and a rotor (104) which is rotatably connected to the stator (103), a circulating liquid discharge port (107) is formed in one end of the stator (103), the connecting body (102) is fixedly connected to one end, away from the circulating liquid discharge port (107), of the stator (103), a connecting hole (116) communicated with the interior of the stator (103) is formed in the connecting body (102), two graphite bearings (106) which are coaxially arranged are fixedly connected to two ends of the stator (103), the rotor (104) is rotatably connected with the graphite bearings (106), a communicating groove (115) which is spirally arranged is formed in the inner wall of the graphite bearings (106), the communicating groove (115) spirally extends into the stator (103) along the rotating direction of the rotor (104), one end of the communicating groove (115) is communicated with the connecting hole (116), the other end is communicated with the interior of the stator (103), the pump device (100) comprises a pump body (110) fixedly connected to the connecting body (102) and an impeller (111) rotatably connected to the interior of the pump body (110), a liquid inlet (112) and a liquid outlet (113) are formed in the pump body (110), a communication flow channel (114) communicated with the liquid outlet (113) is formed in the pump body (110), the other end of the communication flow channel (114) is communicated with a connecting hole (116), and one end of the rotor (104) penetrates through the connecting hole (116) and is coaxially and fixedly connected with the impeller (111).

2. The reverse circulation canned motor pump with a coupling body according to claim 1, wherein: the coaxial fixedly connected with solid-liquid separation structure (117) in connector (102), solid-liquid separation structure (117) include sleeve (118) and coaxial fixed connection auger blade (119) in sleeve (118), sleeve (118) is worn to locate by rotor (104) is coaxial, sleeve (118) are seted up a plurality of holding tanks (120) that are used for holding particulate impurity.

3. The reverse circulation canned motor pump with a coupling body according to claim 2, wherein: holding tank (120) are the spiral arrangement along auger blade (119), holding tank (120) are the slope setting, and its open-ended one end inclines to the central direction of sleeve (118), and the other end inclines to the central direction of keeping away from sleeve (118), holding tank (120) are towards the opposite direction of liquid flow direction.

4. The reverse circulation canned motor pump with a coupling body according to claim 2, wherein: the sleeve (118) comprises an outer shell (122) and an inner bushing (123) which is coaxially and fixedly connected in the outer shell (122), the packing auger blade (119) is fixedly connected to the inner wall of the inner bushing (123), the accommodating groove (120) is formed in the inner bushing (123) and penetrates through the inner bushing (123), and the bottom wall of the accommodating groove (120) is the inner wall of the outer shell (122).

5. The reverse circulation canned motor pump with a coupling body of claim 4, wherein: an internal thread is formed in one end of the inner wall of the outer shell (122), threads of the internal thread are flush with the inner wall of the outer shell (122), an external thread is formed in the outer wall of one end of the inner bushing (123), the threads of the external thread protrude out of the outer wall of the inner bushing (123), and the outer shell (122) is in threaded connection with the inner bushing (123).

6. The reverse circulation canned motor pump with a coupling body of claim 5, wherein: the inner wall of the outer shell (122) and the outer wall of the inner lining (123) are provided with conicity, one end, close to the internal thread, of the inner wall of the outer shell (122) is a large end face, and one end, close to the external thread, of the outer wall of the inner lining (123) is a large end face.

7. The reverse circulation canned motor pump with a coupling body of claim 4, wherein: the inner bushing (123) is provided with a plurality of liquid discharge holes (121), the liquid discharge holes (121) are obliquely arranged, one ends of the liquid discharge holes (121) are communicated with the accommodating groove (120), and the other ends of the liquid discharge holes face the flowing direction of the fluid.

8. The reverse circulation canned motor pump with a coupling body according to claim 1, wherein: the connecting body (102) comprises a cylindrical connecting part (108), two axial ends of the connecting part (108) are fixedly connected with a connecting flange (109) coaxially, the connecting flange (109) is fixedly connected with the pump body (110) through a bolt, and the other connecting flange (109) is fixedly connected with the stator (103) through a bolt.