A high-sealing deep well pump

Abstract

The present application relates to the technical field of deep well pumps. A high-sealing deep well pump includes a pump body, a motor and a sealing mechanism. The pump body is connected to one end of the motor. The motor includes a barrel, an upper end cover and an output shaft. The upper end cover is connected to one end of the barrel close to the pump body. The output shaft is rotatably embedded in the barrel. The sealing mechanism includes a sealing seat, a sealing sleeve and a mechanical seal. The sealing seat is connected to the side of the upper end cover facing the pump body. One end of the output shaft passes through the upper end cover and the sealing seat in sequence and is connected to the pump body. The sealing sleeve is coaxially sleeved on the outer periphery of the output shaft. The sealing sleeve is provided with a receiving groove. The sealing seat is embedded in the receiving groove. The outer periphery of the output shaft is coaxially connected with a mechanical seal to improve the sealing of the shaft connection between the motor output shaft and the pump body, improve the sealing performance of the deep well pump, reduce the possibility of external liquid entering the motor during use and damaging the parts inside the motor, and improve the service life of the deep well pump.

Description

Technical Field

[0001] The present application relates to the technical field of deep well pumps, and in particular to a high-sealing deep well pump. Background Art

[0002] A deep well pump is a machine that extracts water from a deep well. It is a pump that is immersed in a groundwater well to pump and deliver water. It is widely used in mine rescue, construction drainage, agricultural irrigation, industrial water circulation, hot spring water, drinking water supply for urban and rural residents, and even in disaster relief and water extraction from deep groundwater.

[0003] The deep well pump includes a motor and a pump body, which are axially connected as one. Traditional deep well pumps usually only use a sealing sleeve to cover the sealing platform to fix the motor and pump body at the shaft connection to achieve sealing. This sealing method is not ideal. Due to the loose sealing, it is easy to cause liquid leakage and damage the parts inside the pump body. Therefore, how to improve the sealing performance of deep well pumps has become a problem that needs to be solved urgently. Utility Model Content

[0004] In order to improve the sealing of the shaft connection between the motor and the pump body, improve the sealing performance of the deep well pump, and increase the service life of the deep well pump, the present application provides a high-sealing deep well pump.

[0005] The application provides a high-sealing deep well pump adopts the following technical solution:

[0006] A high-sealing deep well pump comprises a pump body, a motor and a sealing mechanism, wherein the pump body is coaxially connected to one end of the motor, the motor comprises a barrel, an upper end cover and an output shaft, the upper end cover is coaxially connected to one end of the barrel close to the pump body, the output shaft is coaxially rotatable and embedded in the barrel, the sealing mechanism comprises a sealing seat, a sealing sleeve and a mechanical seal, the sealing seat is coaxially connected to a side of the upper end cover facing the pump body, one end of the output shaft sequentially penetrates the upper end cover and the sealing seat and is then connected to the pump body, the sealing sleeve is coaxially sleeved on the outer periphery of the output shaft, a receiving groove is provided on the side of the sealing sleeve close to the upper end cover, the sealing seat is embedded in the receiving groove, and the mechanical seal is coaxially connected to the outer periphery of the output shaft.

[0007] By adopting the above technical solution, the sealing sleeve is provided with a receiving groove, the sealing seat is embedded in the receiving groove, and the outer periphery of the output shaft is coaxially connected with a mechanical seal to improve the sealing of the connection between the motor output shaft and the shaft body of the pump body, improve the sealing performance of the deep well pump, reduce the possibility of external liquid entering the motor during use and damaging the parts inside the motor, and increase the service life of the deep well pump.

[0008] Preferably, the mechanical seal is embedded in the accommodating groove, and one end of the mechanical seal abuts against an end of the sealing seat away from the upper end cover.

[0009] By adopting the above technical solution, the possibility of external sand and gravel entering the mechanical seal is reduced, the wear rate of the mechanical seal is reduced, and the service life of the mechanical seal is increased.

[0010] Preferably, the sealing mechanism also includes a retaining spring, and the mechanical seal includes a dynamic ring, an elastic member, a pressure ring and a static ring, the static ring is connected to a side surface of the sealing seat away from the upper end cover, the dynamic ring is sleeved on the outer periphery of the output shaft, the outer periphery of the output shaft is provided with a retaining groove, the retaining spring is embedded in the retaining groove, the retaining spring abuts against one end of the dynamic ring away from the static ring, a first sealing groove is provided on the side of the dynamic ring facing the static ring, one end of the pressure ring is embedded in the first sealing groove, the elastic member is connected between the dynamic ring and the pressure ring, and the elastic member makes the end of the pressure ring close to the static ring have a tendency to press against the static ring.

[0011] By adopting the above technical solution, the elastic member enables the pressure ring to always press against the static ring, thereby ensuring the sealing performance between the pressure ring and the static ring, and further ensuring the sealing performance of the connection between the motor output shaft and the pump body, thereby ensuring the safe use of the deep well pump; a retaining spring is arranged to cooperate with the reaction force of the elastic member to achieve axial fixation of the moving ring and the output shaft, thereby facilitating the installation and disassembly of the moving ring.

[0012] Preferably, a convex ring is connected to the outer periphery of the sealing seat, and an embedding groove is provided at the groove wall of the accommodating groove close to the upper end cover, the convex ring is embedded in the embedding groove, and the side wall of the convex ring is in contact with the groove wall of the embedding groove.

[0013] By adopting the above technical solution, a convex ring and an embedded groove are provided, so that a labyrinth seal is formed between the sealing sleeve and the sealing seat, thereby improving the sealing performance between the sealing sleeve and the sealing seat, thereby ensuring the sealing performance of the connection between the motor output shaft and the pump body, and ensuring the safe use of the deep well pump.

[0014] Preferably, one end of the sealing sleeve close to the upper end cover abuts against a side surface of the upper end cover away from the barrel.

[0015] By adopting the above technical solution, it is easy to realize the positioning of the sealing sleeve, reduce the possibility of the sealing sleeve not being installed in place, resulting in insufficient sealing performance of the deep well pump, and ensure the reliability of the sealing mechanism.

[0016] Preferably, a positioning platform is coaxially connected to a side of the upper end cover facing the pump body, a positioning groove is provided at a groove wall on one side of the embedding groove close to the upper end cover, and a side wall of the positioning platform fits with a groove wall of the positioning groove.

[0017] By adopting the above technical scheme, the positioning table and the positioning groove cooperate with each other, so that on the basis of forming a labyrinth seal between the sealing sleeve and the sealing seat, the sealing sleeve and the positioning table also form a labyrinth seal, thereby improving the sealing performance between the sealing sleeve and the sealing seat, thereby ensuring the sealing performance of the connection between the motor output shaft and the pump body, and ensuring the safe use of the deep well pump.

[0018] Preferably, a first chamfer is provided on the outer periphery of one end of the positioning platform close to the pump body, and a second chamfer is provided on the groove wall of the positioning groove away from the pump body, and the first chamfer fits with the second chamfer.

[0019] By adopting the above technical solution, the first chamfer and the second chamfer play a guiding role, making it easier for the positioning platform to be embedded in the positioning groove, and the second chamfer fits the first chamfer to improve the sealing performance between the sealing sleeve and the positioning platform.

[0020] Preferably, a mounting groove is coaxially provided on one side of the positioning platform close to the pump body, and the sealing seat is embedded in the mounting groove.

[0021] By adopting the above technical solution, the positioning platform is embedded in the installation groove, which facilitates the positioning of the sealing seat, reduces the sliding of the sealing seat relative to the output shaft in a direction perpendicular to the output shaft axis during use, and ensures the sealing performance of the sealing seat.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The sealing sleeve is provided with a receiving groove, the sealing seat is embedded in the receiving groove, and the outer periphery of the output shaft is coaxially connected with a mechanical seal to improve the sealing performance of the connection between the motor output shaft and the shaft body of the pump body, improve the sealing performance of the deep well pump, reduce the possibility of external liquid entering the motor during use and damaging the parts inside the motor, and increase the service life of the deep well pump;

[0024] 2. Reduce the possibility of external sand and other substances entering the mechanical seal, reduce the wear rate of the mechanical seal, and increase the service life of the mechanical seal; the elastic member makes the pressure ring always close to the static ring, ensuring the sealing performance between the pressure ring and the static ring, thereby ensuring the sealing performance of the connection between the motor output shaft and the pump body, and ensuring the safety of the deep well pump; the circlip is arranged to cooperate with the reaction force of the elastic member to achieve axial fixation of the dynamic ring and the output shaft, which is convenient for the installation and removal of the dynamic ring;

[0025] 3. The positioning table and the positioning groove cooperate with each other, so that the sealing sleeve and the sealing seat form a labyrinth seal. The sealing sleeve and the positioning table also form a labyrinth seal, which improves the sealing performance between the sealing sleeve and the sealing seat, thereby ensuring the sealing performance of the connection between the motor output shaft and the pump body, and ensuring the safe use of the deep well pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of the motor and sealing mechanism.

[0027] Figure 2 It is a structural diagram of a high-sealing deep well pump.

[0028] Figure 3 yes Figure 1Enlarged view of point A in the middle.

[0029] Figure 4 yes Figure 1 Enlarged view of point B in the middle.

[0030] Description of reference numerals:

[0031] 1. Pump body;

[0032] 2. Motor; 21. Cylinder; 211. Fixing groove; 212. First connecting hole; 213. First positioning ring; 214. Abutting ring; 215. Second positioning ring; 22. Upper end cover; 221. Positioning platform; 2211. First chamfer; 2212. Mounting groove; 222. Abutting groove; 223. Limiting groove; 224. Second connecting hole; 23. Output shaft; 231. Clamping groove; 24. Upper bearing seat; 241. First fixing hole; 242. Positioning block; 243. Connecting column; 25. Spring washer; 26. Nut; 27. Lower end cover; 271. Fitting part; 272. Second limiting ring; 28. Oil bag; 281. Fixing part; 2811. Accommodating cavity; 282. First limiting ring; 2821. First ring groove; 29. ​​Lower bearing seat; 20. Stator; 210. Rotor;

[0033] 3. Sealing mechanism; 31. Sealing seat; 311. Protruding ring; 32. Sealing sleeve; 321. Accommodating groove; 322. Embedding groove; 323. Positioning groove; 324. Second chamfer; 33. Mechanical seal; 331. Stationary ring; 332. Moving ring; 3321. First sealing groove; 333. Pressing ring; 334. Elastic member;

[0034] 4. Circlip. DETAILED DESCRIPTION

[0035] The present application is further described in detail below in conjunction with the accompanying drawings.

[0036] Reference Figure 1, the embodiment of the present application discloses a high-sealing deep well pump including a motor 2. The motor 2 includes a barrel 21, an upper end cover 22, an upper bearing seat 24, a spring washer 25 and a nut 26. A fixing groove 211 is provided at the inner wall of the barrel 21 at one end along the axis direction of the barrel 21, and the upper bearing seat 24 is embedded in the fixing groove 211. A plurality of first connecting holes 212 are provided at the groove wall of the fixing groove 211, and the plurality of first connecting holes 212 are evenly distributed around the axis of the barrel 21. In this embodiment, three first connecting holes 212 are provided. A plurality of first fixing holes 241 are provided at the side wall of the upper bearing seat 24, and the number of the first fixing holes 241 is the same as the number of the first connecting holes 212 and corresponds one to one, and the bolts are threadedly connected with the first fixing holes 241 after passing through the first connecting holes 212. The upper end cover 22 is coaxially fixedly connected to one end of the barrel 21 near the upper bearing seat 24. The upper end cover 22 is provided with an abutting groove 222 on one side near the barrel 21. The barrel 21 is embedded in the abutting groove 222. The end of the barrel 21 near the upper bearing seat 24 abuts against the bottom of the abutting groove 222. The outer wall of the barrel 21 fits with the groove wall of the abutting groove 222. A limiting groove 223 is provided at the bottom of the abutting groove 222. The end of the upper bearing seat 24 away from the bottom of the fixed groove 211 is fixedly connected with a positioning block 242. The positioning block 242 is embedded in the limiting groove 223. The side wall of the positioning block 242 fits with the groove wall of the limiting groove 223. The end of the positioning block 242 away from the bottom of the fixed groove 211 is fixedly connected with a plurality of connecting columns 243. The plurality of connecting columns 243 are evenly distributed around the axis of the barrel 21. In this embodiment, three connecting columns 243 are provided. A plurality of second connection holes 224 are provided at the bottom of the limiting groove 223, and the second connection holes 224 are used for the connection column 243 to pass through. The spring washer 25 is sleeved on the outer periphery of the connection column 243, and the side surface of the spring washer 25 close to the upper end cover 22 abuts against the side surface of the upper end cover 22 away from the barrel 21. The nut 26 is threadedly connected to the outer periphery of the connection column 243, and the nut 26 abuts against the side surface of the spring washer 25 away from the upper end cover 22. The number of the second connection holes 224, the spring washers 25 and the nuts 26 is the same as the number of the connection columns 243 and corresponds one to one.

[0037] Reference Figure 2 , a high-sealing deep well pump also includes a pump body 1. The pump body 1 is coaxially fixedly connected to a side of an upper end cover 22 away from a barrel 21.

[0038] Reference Figure 1 and Figure 3The motor 2 further includes an oil bag 28 and a lower end cover 27. The oil bag 28 is coaxially embedded in the barrel 21. The oil bag 28 is located at one end of the barrel 21 away from the upper end cover 22. The oil bag 28 includes a fixing portion 281 and a first limiting ring 282. The fixing portion 281 is gradually arranged along the axis of the barrel 21 toward the upper end cover 22. A accommodating cavity 2811 is provided on the side of the fixing portion 281 away from the upper end cover 22, a first limiting ring 282 is coaxially fixedly connected to the outer periphery of one end of the fixing portion 281 close to the notch of the accommodating cavity 2811, a first annular groove 2821 is provided on the outer periphery of the first limiting ring 282, a first positioning ring 213 is coaxially fixedly connected to the inner wall of the barrel 21 away from the upper end cover 22, the first positioning ring 213 is embedded in the first annular groove 2821, an abutting ring 214 is connected to the inner periphery of one end of the barrel 21 away from the upper end cover 22, and a side surface of the abutting ring 214 facing the first limiting ring 282 is in contact with a side surface of the first limiting ring 282 away from the upper end cover 22. In this embodiment, the oil bag 28 is made of rubber. The lower end cover 27 includes a fitting portion 271 and a second limiting ring 272. The fitting portion 271 is embedded in the accommodating cavity 2811. The outer periphery of the fitting portion 271 presses against the cavity wall of the accommodating cavity 2811 so that the outer wall of the oil bag 28 presses against the inner wall of the barrel 21. The second limiting ring 272 is fixedly connected to the outer periphery of the fitting portion 271 away from the bottom of the accommodating cavity 2811. The side surface of the second limiting ring 272 facing the oil bag 28 presses against the side surface of the abutment ring 214 away from the upper end cover 22.

[0039] The motor 2 further includes a lower bearing seat 29, a stator 20, a rotor 210 and an output shaft 23. The inner wall of the barrel 21 is fixedly connected to the second positioning ring 215, and the second positioning ring 215 is located on the side of the first positioning ring 213 close to the upper end cover 22. The lower bearing seat 29 is embedded in the barrel 21, and one end of the lower bearing seat 29 close to the oil bag 28 abuts against the side surface of the second positioning ring 215 away from the first positioning ring 213. The stator 20 is embedded in the housing, and the stator 20 is located between the upper bearing seat 24 and the lower bearing seat 29. The rotor 210 is rotatably connected to the stator 20, and the rotation axis of the rotor 210 coincides with the axis of the barrel 21. The output shaft 23 is coaxially connected to the rotor 210, and one end of the output shaft 23 close to the lower end cover 27 is rotatably connected to the lower bearing seat 29, and the other end of the output shaft 23 passes through the upper bearing seat 24 and the upper end cover 22 in sequence and is connected to the pump body 1.

[0040] Reference Figure 1 and Figure 4A high-sealing deep well pump also includes a sealing mechanism 3. The sealing mechanism 3 includes a sealing seat 31, which is fixedly connected to the side of the upper end cover 22 away from the barrel 21, and the end of the output shaft 23 close to the pump body 1 passes through the sealing seat 31, and the inner wall of the sealing seat 31 fits the outer wall of the output shaft 23. The end of the upper end cover 22 away from the barrel 21 is coaxially fixedly connected with a positioning platform 221, and the surface of the positioning platform 221 away from the barrel 21 is provided with a mounting groove 2212, and the sealing seat 31 is embedded in the mounting groove 2212.

[0041] The sealing mechanism 3 further includes a sealing sleeve 32. The sealing sleeve 32 is coaxially sleeved on the outer periphery of the output shaft 23, the inner wall of the sealing sleeve 32 is fitted with the outer wall of the output shaft 23, and one end of the sealing sleeve 32 close to the upper end cover 22 abuts against the surface of the side of the upper end cover 22 away from the barrel 21. A receiving groove 321 is provided on the side of the sealing sleeve 32 close to the upper end cover 22, the sealing seat 31 is embedded in the receiving groove 321, a convex ring 311 is fixedly connected to the outer periphery of one end of the sealing seat 31 close to the bottom of the installation groove 2212, an embedded groove 322 is provided at the groove wall of the receiving groove 321 close to one end of the upper end cover 22, the convex ring 311 is embedded in the embedded groove 322, and the side wall of the convex ring 311 is fitted with the groove wall of the embedded groove 322. A positioning groove 323 is provided at the groove wall of the embedding groove 322 near one end of the upper end cover 22, and the positioning platform 221 is embedded in the positioning groove 323. A second chamfer 324 is provided at the groove wall of the positioning groove 323 near one end of the upper end cover 22, and a first chamfer 2211 is provided at the outer periphery of the end of the positioning platform 221 away from the barrel 21, and the first chamfer 2211 is fitted with the second chamfer 324. A labyrinth seal is formed between the sealing sleeve 32, the sealing seat 31 and the positioning platform 221.

[0042] A high-sealing deep well pump also includes a retaining spring 4. The sealing mechanism 3 also includes a mechanical seal 33. The retaining spring 4 and the mechanical seal 33 are embedded in the receiving groove 321, and the mechanical seal 33 is sleeved on the outer periphery of the output shaft 23. The mechanical seal 33 includes a dynamic ring 332, a static ring 331, an elastic member 334 and a pressure ring 333. The static ring 331 is coaxially fixedly connected to the end of the sealing seat 31 away from the bottom of the mounting groove 2212, and the dynamic ring 332 is located on the side of the static ring 331 away from the barrel 21. The dynamic ring 332 is coaxially sleeved on the outer periphery of the output shaft 23, and a retaining groove 231 is provided on the outer periphery of the output shaft 23. The retaining groove 231 is located on the side of the dynamic ring 332 away from the exchange, and the retaining spring 4 is embedded in the retaining groove 231, and the surface of the side of the retaining spring 4 close to the upper end cover 22 abuts against the end of the dynamic ring 332 away from the static ring 331. A first sealing groove 3321 is provided on one side surface of the dynamic ring 332 close to the static ring 331, one end of the pressure ring 333 is embedded in the first sealing groove 3321, and the other end of the pressure ring 333 abuts against one side surface of the static ring 331 away from the upper end cover 22. The elastic member 334 is connected between the dynamic ring 332 and the pressure ring 333, and the elastic member 334 makes the pressure ring 333 have a tendency to abut against one end of the static ring 331 away from the upper end cover 22. In this embodiment, the elastic member 334 is a spring, and the elastic member 334 is embedded in the first sealing groove 3321, one end of the elastic member 334 is connected to one end of the pressure ring 333 away from the static ring 331, and the other end of the elastic member 334 is connected to the bottom of the first sealing groove 3321.

[0043] The implementation principle of a high-sealing deep well pump in the embodiment of the present application is as follows: the sealing seat 31 is embedded in the installation groove 2212, and the static ring 331 is connected to the sealing seat 31, the retaining spring 4 abuts against the end of the dynamic ring 332 away from the static ring 331, and the pressure ring 333 is slidably embedded in the first sealing groove 3321. The elastic member 334 makes the pressure ring 333 abut against the side surface of the static ring 331 away from the sealing seat 31, so as to fix the dynamic ring 332 relative to the axis of the bearing seat. Then the sealing sleeve 32 is sleeved on the outer periphery of the mechanical seal 33 and the sealing seat 31, so that the groove wall of the embedded groove 322 fits with the outer wall of the convex ring 311, and the groove wall of the positioning groove 323 fits with the outer wall of the positioning platform 221, so that a labyrinth seal is formed between the sealing sleeve 32 and the sealing seat 31 and the positioning platform 221, thereby improving the sealing performance of the shaft connection between the motor 2 and the pump body 1.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-sealing deep well pump, characterized in that: The invention comprises a pump body (1), a motor (2) and a sealing mechanism (3); the pump body (1) is coaxially connected to one end of the motor (2); the motor (2) comprises a barrel (21), an upper end cover (22) and an output shaft (23); the upper end cover (22) is coaxially connected to one end of the barrel (21) close to the pump body (1); the output shaft (23) is coaxially rotatably embedded in the barrel (21); the sealing mechanism (3) comprises a sealing seat (31), a sealing sleeve (32) and a mechanical seal (33); the sealing seat (31) is coaxially connected to a side of the upper end cover (22) facing the pump body (1); one end of the output shaft (23) passes through the upper end cover (22) and the sealing seat (31) in sequence and is then connected to the pump body (1); the sealing sleeve (32) is coaxially sleeved on the outer periphery of the output shaft (23); a receiving groove (321) is provided on a side of the sealing sleeve (32) close to the upper end cover (22), and the sealing seat (31) is embedded in the receiving groove (321); the mechanical seal (33) is coaxially connected to the outer periphery of the output shaft (23).

2. The high-sealing deep well pump according to claim 1, characterized in that: The mechanical seal (33) is embedded in the accommodating groove (321); one end of the mechanical seal (33) abuts against one end of the sealing seat (31) away from the upper end cover (22).

3. The high-sealing deep well pump according to claim 2 is characterized in that: The sealing mechanism (3) further comprises a retaining ring (4); the mechanical seal (33) comprises a moving ring (332), an elastic member (334), a pressure ring (333) and a stationary ring (331); the stationary ring (331) is connected to a surface of a side of the sealing seat (31) away from the upper end cover (22); the moving ring (332) is sleeved on the outer periphery of the output shaft (23); a retaining groove (231) is provided on the outer periphery of the output shaft (23); the retaining ring (4) is embedded in the retaining groove (231); the retaining ring ( 4) abutting against one end of the moving ring (332) away from the static ring (331); a first sealing groove (3321) is provided on the side of the moving ring (332) facing the static ring (331); one end of the pressure ring (333) is embedded in the first sealing groove (3321); the elastic member (334) is connected between the moving ring (332) and the pressure ring (333); the elastic member (334) enables one end of the pressure ring (333) close to the static ring (331) to have a tendency to press against the static ring (331).

4. The high-sealing deep well pump according to claim 1, characterized in that: A convex ring (311) is connected to the outer periphery of the sealing seat (31); an embedding groove (322) is provided at the groove wall of the accommodating groove (321) close to the upper end cover (22); the convex ring (311) is embedded in the embedding groove (322); and the side wall of the convex ring (311) is in contact with the groove wall of the embedding groove (322).

5. The high-sealing deep well pump according to claim 4 is characterized in that: One end of the sealing sleeve (32) close to the upper end cover (22) abuts against a side surface of the upper end cover (22) away from the barrel (21).

6. The high-sealing deep well pump according to claim 5, characterized in that: A positioning platform (221) is coaxially connected to a side of the upper end cover (22) facing the pump body (1); a positioning groove (323) is provided at a groove wall of one side of the embedding groove (322) close to the upper end cover (22); and a side wall of the positioning platform (221) fits with a groove wall of the positioning groove (323).

7. The high-sealing deep well pump according to claim 6, characterized in that: A first chamfer (2211) is provided on the outer periphery of one end of the positioning platform (221) close to the pump body (1); a second chamfer (324) is provided on the groove wall of the positioning groove (323) on the side away from the pump body (1); and the first chamfer (2211) and the second chamfer (324) are in contact with each other.

8. The high-sealing deep well pump according to claim 6, characterized in that: A mounting groove (2212) is coaxially provided on one side of the positioning platform (221) close to the pump body (1); the sealing seat (31) is embedded in the mounting groove (2212).

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