CN111503008B

CN111503008B - Amphibious shielded permanent magnet high-speed multistage pump

Info

Publication number: CN111503008B
Application number: CN202010332011.5A
Authority: CN
Inventors: 张文敏; 张芬
Original assignee: Zhejiang Zheshui Industry And Trade Co ltd
Current assignee: Zhejiang Zheshui Industry And Trade Co ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2022-03-15
Anticipated expiration: 2040-04-24
Also published as: CN111503008A

Abstract

The invention discloses an amphibious shielding permanent magnet high-speed multistage pump, which has the advantages of good heat dissipation of a motor, high lift and high efficiency, and can realize multiple purposes under water and on land, and the technical scheme is characterized by comprising a pump shell, a motor component and an impeller, wherein the motor component comprises a motor barrel, a stator, a rotor and a rotor shaft, the pump shell is sleeved outside the motor barrel, an upper connecting seat and a lower connecting seat for fixing the motor barrel are arranged in the pump shell, a water passing cavity is formed between the pump shell and the motor barrel, a wheel shaft is arranged at the lower end of the rotor shaft, the impeller is of a multistage structure and is arranged at the lower end of the rotor shaft, an extrusion chamber is arranged at the upper end of the pump shell, a water inlet is arranged at the lower end of the pump shell, the water inlet, the water passing cavity and the extrusion chamber are communicated in sequence, a bottom end connecting seat is arranged on the water inlet, the bottom end connecting seat comprises a shaft sleeve part matched with the wheel shaft and a threaded connecting port for external connection, the invention is suitable for the technical field of water pumps.

Description

Amphibious shielded permanent magnet high-speed multistage pump

Technical Field

The invention belongs to the technical field of water pumps, and particularly relates to an amphibious shielded permanent magnet high-speed multistage pump.

Background

The existing water pump is single in function, can be used only in specific occasions and cannot be used generally, for example, a submersible pump needs to be used underwater, for example, a self-sucking pump needs to be used on land, and therefore the existing water pump is inconvenient to use; in addition, the motor can produce a large amount of heats when the water pump is in use, and the motor is overheated and easily leads to the internal part to damage, consequently needs to improve current water pump.

Disclosure of Invention

The invention aims to provide an amphibious shielded permanent magnet high-speed multistage pump which has the advantages of good heat dissipation performance, high lift and high efficiency of a motor and can be used for multiple purposes underwater and on land.

The purpose of the invention is realized as follows: the utility model provides an amphibious shielded permanent magnetism high-speed multistage pump, includes pump case, motor element and impeller, and the motor element includes motor barrel, stator, rotor and rotor shaft, its characterized in that: the pump case overlaps in the motor barrel outside, is equipped with last connecting seat and the lower connecting seat that is used for fixed motor barrel in the pump case, forms the water cavity between pump case and the motor barrel, is equipped with the shaft on the lower extreme of rotor shaft, and the impeller is multi-stage structure and all installs on the lower extreme of rotor shaft, and the upper end of pump case is equipped with the extrusion room, and the lower extreme of pump case is the water inlet, and the water inlet, cross the water cavity and the extrusion room and communicate in proper order, is equipped with the bottom connecting seat on the water inlet, and the bottom connecting seat includes the axle sleeve portion with the shaft adaptation and is used for external threaded connection mouth.

The invention is further configured to: the upper connecting seat comprises an upper end cover, the lower connecting seat comprises a lower end cover, shaft holes are formed in the upper end cover and the lower end cover, and graphite sleeves sleeved on the rotor shaft are arranged in the shaft holes.

The invention is further configured to: and the rotor shaft is also provided with a ceramic coating matched with the graphite sleeve.

The invention is further configured to: the rotor shaft is further sleeved with a thrust structure arranged between the lower connecting seat and the stator, the thrust structure comprises an upper friction plate, a lower friction plate and a thrust seat which are sequentially arranged from top to bottom, a spherical groove is formed in the upper end face of the shaft hole of the lower end cover, and a spherical convex block matched with the spherical groove is arranged at the bottom of the thrust seat.

The invention is further configured to: the top surface of the thrust block is provided with a first limiting groove, the bottom surface of the lower friction plate is provided with a first limiting lug matched with the first limiting groove, the spherical groove is internally provided with a second limiting groove, and the outer wall of the spherical lug is provided with a second limiting lug matched with the second limiting groove.

The invention is further configured to: still the cover is equipped with and arranges the husky mechanism of getting rid of lower extreme lid below in on the rotor shaft, gets rid of husky mechanism and includes the husky seat of getting rid of and get rid of husky ring of getting rid of adaptation, gets rid of still to be equipped with the skeleton oil blanket of cover on the rotor shaft between husky seat and the lower extreme lid.

The invention is further configured to: the motor assembly adopts a shielding type permanent magnet motor.

The invention is further configured to: and the upper end cover and the lower end cover are both provided with water passing holes communicated with the inside of the motor cylinder, and the water passing holes are provided with filter screens.

The invention is further configured to: an upper friction ring which is axially abutted is further arranged between the upper end cover and the rotor, and a lower friction ring which is axially abutted is further arranged between the uppermost end of the impeller and the wheel shaft.

The invention is further configured to: and a cable cavity for leading out a cable is arranged on the upper end cover.

By adopting the technical scheme, the method has the following advantages: when the water-cooled motor is used, water flow directly passes through the motor shell, the motor is fast in heat dissipation and not prone to heating, the overall efficiency can be improved, and energy and electricity are saved;

the bottom of the shell is connected with a bottom end connecting seat, and when a filtering cover shell is arranged on a threaded connecting port of the bottom end connecting seat, the multistage pump can be used as a submersible pump under water; when the flange plate is arranged on the threaded connection port, the flange plate can be used for being arranged on a pipeline and serving as a pipeline booster pump; when the threaded connecting port is connected with the one-way valve and the water pipe, the self-priming pump can be used on land and serves as a self-priming pump, so that the dual-purpose effect of land and water is achieved; when the water supply device is connected to a pipeline for use, a pressure sensor can be arranged at the water outlet end of the multi-stage pump and used for detecting water pressure, the pressure sensor feeds detection signals back to a drive control system of the permanent magnet motor, and the drive control system adjusts the speed of the permanent magnet motor according to the pressure change so as to realize constant-pressure water supply;

the motor coil is sealed by epoxy resin, and has good waterproof and explosion-proof properties.

Drawings

FIG. 1 is a schematic structural view of the present invention;

the reference numbers in the figures are: 1. a pump housing; 2. an impeller; 3. a motor cartridge; 4. a rotor shaft; 5. an upper connecting seat; 6. a lower connecting seat; 7. a water passing cavity; 8. a wheel axle; 9. an extrusion chamber; 10. a bottom end connecting seat; 11. a boss portion; 12. a threaded connector; 13. an upper end cover; 14. a lower end cover; 15. a graphite sleeve; 16. an upper friction plate; 17. a lower friction plate; 18. a thrust block; 19. a spherical bump; 20. a first limit bump; 21. throwing sand seats; 22. throwing sand rings; 23. framework oil seal; 24. an upper friction ring; 25. a lower friction ring; 26. a cable cavity.

Detailed Description

The invention will be further described in the following with reference to specific embodiments in conjunction with the accompanying drawings, see fig. 1:

the utility model provides an amphibious shielded permanent magnetism high-speed multistage pump, includes pump case 1, motor element and impeller 2, and the motor element includes motor barrel 3, stator, rotor and rotor shaft 4, its characterized in that: the utility model discloses a motor casing, including pump case 1, motor barrel 3, impeller 2, impeller 1, pump case 1, the upper junction seat 5 that is used for fixed motor barrel 3 and lower junction seat 6 are equipped with in the pump case 1, form water passing cavity 7 between pump case 1 and the motor barrel 3, be equipped with shaft 8 on the lower extreme of rotor shaft 4, impeller 2 is the multilevel structure and all installs on the lower extreme of rotor shaft 4, the upper end of pump case 1 is equipped with extrusion chamber 9, the lower extreme of pump case 1 is the water inlet, water passing cavity 7 and extrusion chamber 9 communicate in proper order, be equipped with bottom connecting seat 10 on the water inlet, bottom connecting seat 10 includes 11 with the axle sleeve portion of shaft 8 adaptation and is used for external threaded connection mouth 12.

The upper connecting seat 5 and the motor barrel 3 and the lower connecting seat 6 and the motor barrel 3 can be fixed through screws, the upper connecting seat 5 and the pump shell 1 can be connected through rivets, the lower end of the upper connecting seat 5 is axially abutted against a volute outside the impeller 2 to play a role in fixing, and water passing holes are required to be formed in the upper connecting seat 5 and the lower connecting seat 6, so that the water inlet, the water passing cavity 7 and the extrusion chamber 9 can be sequentially communicated; wherein the bottom of pump case 1 still is equipped with the bottom that is used for fixed bottom connecting seat 10, the bottom of bottom plays the axial fixity effect to bottom connecting seat 10, through pin joint between the periphery wall of bottom and the pump case 1, still be equipped with the holding screw of contradicting with the connecting seat axial on the bottom of pump case 1, through above-mentioned structure, when screwing up holding screw, holding screw produces the fastening force of pushing up to the connecting seat, the rethread connecting seat plays the axial conflict effect to the volute, ensure its stability.

When the motor assembly is used, water is sucked from the water inlet at the bottom end of the pump shell 1, then enters the water passing cavity 7 after passing through the multistage impeller 2, and is discharged from the water outlet on the extrusion chamber 9, and through the mode, water flow can play a role in quickly cooling and radiating the outer wall of the motor assembly; the threaded connector 12 is convenient for externally connecting different components according to use requirements, for example, when a filtering cover shell is arranged on the threaded connector 12, the multistage pump can be used as a submersible pump under water; when the threaded connection port 12 is provided with a flange, the threaded connection port can be used for being arranged on a pipeline and serving as a pipeline booster pump; when the threaded connection port 12 is connected with the check valve and the water pipe, the self-priming pump can be used on land and serves as a self-priming pump.

When the pressure sensor is connected to a pipeline for use, the pressure sensor can be arranged at the water outlet end of the multi-stage pump and used for detecting water pressure, the pressure sensor feeds detection signals back to a drive control system of the permanent magnet motor, and the drive control system adjusts the speed of the permanent magnet motor according to the pressure change, so that constant-pressure water supply is realized.

The upper connecting seat 5 comprises an upper end cover 13, the lower connecting seat 6 comprises a lower end cover 14, shaft holes are formed in the upper end cover 13 and the lower end cover 14, and graphite sleeves 15 sleeved on the rotor shafts 4 are arranged in the shaft holes.

The graphite sleeve 15 is installed in the shaft hole, and the graphite sleeve 15 and the shaft hole are used for ensuring the stability of the rotor shaft 4 during rotation and simultaneously play a role in reducing abrasion through the graphite sleeve 15.

The rotor shaft 4 is also provided with a ceramic coating matched with the graphite sleeve 15, and ceramic paint is sprayed on the surface of the metal rotor shaft 4 by a ceramic spraying technology to be matched with the graphite sleeve 15, so that the effect of reducing abrasion can be further achieved.

The rotor shaft 4 is further sleeved with a thrust structure arranged between the lower connecting seat 6 and the stator, the thrust structure comprises an upper friction plate 16, a lower friction plate 17 and a thrust block 18 which are sequentially arranged from top to bottom, a spherical groove is formed in the upper end face of the shaft hole of the lower end cover 14, and a spherical convex block 19 matched with the spherical groove is arranged at the bottom of the thrust block 18.

The top surface of the thrust block 18 is provided with a first limiting groove, the bottom surface of the lower friction plate 17 is provided with a first limiting lug 20 matched with the first limiting groove, the spherical groove is internally provided with a second limiting groove, and the outer wall of the spherical lug 19 is provided with a second limiting lug matched with the second limiting groove.

The thrust structure is used for bearing the axial load of the motor assembly, and when the rotor rotates, the upper friction plate 16 stably rotates relative to the lower friction plate 17; circumferential limiting is realized between the lower friction plate 17 and the thrust block 18 through a first limiting groove and a first limiting lug 20 which are matched, circumferential limiting is realized between the thrust block 18 and the lower connecting seat 6 through a second limiting groove and a second limiting lug which are matched, and the first limiting groove and the second limiting groove can be of strip-shaped groove structures; the thrust seat 18 and the lower end cover 14 are attached through a spherical surface, so that the thrust seat and the lower end cover have an automatic centering effect and better stability.

Still the cover is equipped with on the rotor shaft 4 and arranges the husky mechanism of getting rid of lower extreme cover 14 below in, gets rid of husky mechanism and includes the husky seat 21 of getting rid of and get rid of husky ring 22 of adaptation, gets rid of still to be equipped with the skeleton oil blanket 23 of cover on rotor shaft 4 between husky seat 21 and the lower extreme cover 14.

Get rid of husky seat 21 and quiescence and install on the slotted hole of lower end cover 14 lower surface, skeleton oil blanket 23 is located gets rid of husky seat 21 for increase the leakproofness between lower end cover 14 and the rotor shaft 4, get rid of and can be connected for key or splined connection between husky ring 22 and the rotor shaft 4, make get rid of husky ring 22 and can rotate along with rotor shaft 4, avoid impurity entering the axle hole.

Motor element adopts shielded permanent magnet motor, and motor coil passes through epoxy and carries out full cladding sealed, and rivers can be followed the through-hole on motor housing or the rotor and passed through, and motor element can play abundant heat dissipation explosion-proof effects, and efficiency improves and energy-conserving power saving, and in the actual test, the water pump can dive 1000 meters and use under water, and permanent magnet high speed motor rotational speed can reach 6000 revolutions per minute.

And water passing holes communicated with the interior of the motor cylinder 3 are formed in the upper end cover 13 and the lower end cover 14, and filter screens are arranged on the water passing holes.

Inside the water hole is convenient for some rivers and directly get into the motor, because the motor adopts shielded structure, consequently can not receive the influence, dispel the heat to motor inside, the filter screen can avoid silt to get into inside motor barrel 3.

An upper friction ring 24 which is axially abutted is further arranged between the upper end cover 13 and the rotor, and a lower friction ring 25 which is axially abutted is further arranged between the uppermost end of the impeller 2 and the wheel shaft 8.

The thicknesses of the upper friction ring 24 and the lower friction ring 25 can be adjusted according to the axial clearance between the upper friction ring and the lower friction ring, and the upper friction ring 24 and the lower friction ring 25 are installed to be axially stable, so that the stability during rotation is ensured.

The upper end cover 13 is provided with a cable cavity 26 for leading out a cable, one end of the cable cavity 26 is communicated with the motor barrel 3, a sealing sleeve for the cable to pass through needs to be arranged on the connecting end of the cable cavity 26, and the other end of the cable cavity 26 can be led out from the extrusion chamber 9.

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

Claims

1. An amphibious shielded permanent magnet high-speed multistage pump comprises a pump shell (1), a motor assembly and an impeller (2), wherein the motor assembly comprises a motor barrel (3), a stator, a rotor and a rotor shaft (4), and is characterized in that: the motor pump is characterized in that the pump shell (1) is sleeved outside the motor barrel (3), an upper connecting seat (5) and a lower connecting seat (6) for fixing the motor barrel (3) are arranged in the pump shell (1), a water passing cavity (7) is formed between the pump shell (1) and the motor barrel (3), a wheel shaft (8) is arranged at the lower end of the rotor shaft (4), the impellers (2) are of a multi-stage structure and are all mounted at the lower end of the rotor shaft (4), an extrusion chamber (9) is arranged at the upper end of the pump shell (1), a water inlet is formed at the lower end of the pump shell (1), the water inlet, the water passing cavity (7) and the extrusion chamber (9) are sequentially communicated, a bottom connecting seat (10) is arranged on the water inlet, and the bottom connecting seat (10) comprises a shaft sleeve part (11) matched with the wheel shaft (8) and a threaded connecting port (12) for external connection;

the upper connecting seat (5) comprises an upper end cover (13), the lower connecting seat (6) comprises a lower end cover (14), shaft holes are formed in the upper end cover (13) and the lower end cover (14), and graphite sleeves (15) sleeved on the rotor shafts (4) are arranged in the shaft holes;

a sand throwing mechanism arranged below the lower end cover (14) is further sleeved on the rotor shaft (4) and comprises a sand throwing seat (21) and a sand throwing ring (22) which are matched, and a framework oil seal (23) sleeved on the rotor shaft (4) is further arranged between the sand throwing seat (21) and the lower end cover (14);

the motor assembly adopts a shielding permanent magnet motor;

an upper friction ring (24) which is axially abutted is arranged between the upper end cover (13) and the rotor, and a lower friction ring (25) which is axially abutted is arranged between the uppermost end of the impeller (2) and the wheel shaft (8);

the rotor shaft (4) is also provided with a ceramic coating matched with the graphite sleeve (15);

the rotor shaft (4) is also sleeved with a thrust structure arranged between the lower connecting seat (6) and the stator, the thrust structure comprises an upper friction plate (16), a lower friction plate (17) and a thrust block (18) which are sequentially arranged from top to bottom, a spherical groove is arranged on the upper end face of a shaft hole of the lower end cover (14), and a spherical convex block (19) matched with the spherical groove is arranged at the bottom of the thrust block (18);

a first limiting groove is formed in the top surface of the thrust block (18), a first limiting lug (20) matched with the first limiting groove is arranged on the bottom surface of the lower friction plate (17), a second limiting groove is formed in the spherical groove, and a second limiting lug matched with the second limiting groove is arranged on the outer wall of the spherical lug (19);

and water passing holes communicated with the inside of the motor barrel (3) are formed in the upper end cover (13) and the lower end cover (14), and filter screens are arranged on the water passing holes.

2. An amphibious shielded permanent magnet high speed multistage pump according to claim 1, characterised in that: and a cable cavity (26) for leading out a cable is arranged on the upper end cover (13).