Sealing structure for connecting pump body and motor

Abstract

The invention belongs to the technical field of water pumps, and particularly relates to a sealing structure for connecting a pump body and a motor, the sealing structure comprises a static ring device and a moving ring device which are in contact with each other, one end of the static ring device and one end of the moving ring device are respectively abutted against one side of the pump body and one side of the motor, and the static ring device and the moving ring device are both sleeved on a pump shaft of the water pump. The movable ring device rotates along with a pump shaft of the water pump and comprises a friction ring, a metal spring, a rubber O-shaped ring and a base, the two ends of the metal spring abut against the friction ring and the base respectively, and the friction ring abuts against the static ring device all the time by means of the elastic force of the metal spring. According to the sealing structure, the joint of the motor and the pump body is sealed through the static ring device and the movable ring device, the movable ring device rotates along with a motor shaft of the motor, the static ring device abuts against one side of the pump body, the static ring device and the movable ring device are mechanically sealed, and the service life of the sealing structure can be prolonged.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of water pumps, in particular to a sealing structure for connecting a pump body and a motor. BACKGROUND

[0002] At present, a water pump is a machine for conveying liquid or increasing the pressure of liquid. It transmits mechanical energy or other external energy of a prime mover to liquid, so that the energy of the liquid is increased. It is mainly used for conveying liquid, including water, oil, acid and alkali liquid, emulsion, suspension emulsion and liquid metal, etc. It can also convey liquid, gas mixture and liquid containing suspended solid. The technical parameters of the performance of the water pump include flow rate, suction lift, lift, shaft power, water power, efficiency, etc. A sealing ring is usually installed between the motor and the pump body. The sealing ring is fixed in the pump shell and is sleeved on the pump shaft of the water pump. One end of the sealing ring abuts against the pump shell, and the other end abuts against the impeller. In this way, liquid can be prevented from entering the motor and affecting the function of the motor. The outer side of the existing sealing ring is sleeved with a spring. In this way, the sealing ring can be tightly pressed against the pump shell and the impeller, so as to prevent liquid from leaking into the motor. However, in actual use, the impeller rotates to drive the sealing ring to rub against the pump shell for a long time. The sealing ring is easy to be damaged, and some impurities are easy to enter the motor, causing damage to the motor. SUMMARY

[0003] The purpose of the present application is to use a static ring device and a dynamic ring device for sealing at the connection between the motor and the pump body. The dynamic ring device rotates with the pump shaft of the water pump, and the static ring device abuts against one side of the pump body. The two devices adopt mechanical sealing, which can prolong the service life of the sealing structure.

[0004] The purpose of the present application is achieved as follows:

[0005] A sealing structure for connecting a pump body and a motor includes a static ring device and a dynamic ring device in contact with each other. One end of the static ring device and the dynamic ring device abuts against one side of the pump body and the motor respectively. The static ring device and the dynamic ring device are sleeved on the pump shaft of the water pump, and the dynamic ring device rotates with the pump shaft of the water pump. The dynamic ring device includes a friction ring, a metal spring and a base. The two ends of the metal spring abut against the friction ring and the base respectively. The friction ring always abuts against the static ring device by the elastic force of the metal spring.

[0006] In the above-mentioned sealing structure for connecting a pump body and a motor, one end of the friction ring towards the metal spring is provided with a guide sleeve, the metal spring is sleeved on the outer side of the guide sleeve, and the inner side of the friction ring is provided with a sealing ring.

[0007] In the above-mentioned sealing structure for connecting a pump body and a motor, one end of the friction ring away from the metal spring is provided with an abutting sleeve, and the end face of the abutting sleeve is in contact with the static ring device.

[0008] In the sealing structure for connecting the pump body and the motor, the wall thickness h of the abutting sleeve is smaller than the wall thickness H of the friction ring.

[0009] In the sealing structure for connecting the pump body and the motor, the friction ring is made of graphite material.

[0010] In the sealing structure for connecting the pump body and the motor, the base comprises a rubber connecting seat and a containing seat, the containing seat is sleeved outside the rubber connecting seat, and a containing ring groove for containing part of the metal spring is formed on the containing seat.

[0011] In the sealing structure for connecting the pump body and the motor, the containing seat is internally provided with a limiting convex ring, and the rubber connecting seat is externally provided with a limiting groove matched with the limiting convex ring.

[0012] In the sealing structure for connecting the pump body and the motor, the containing seat is made of stainless steel material.

[0013] In the sealing structure for connecting the pump body and the motor, the static ring device comprises a static ring sleeve and a static ring, the static ring sleeve is sleeved outside the static ring, and one side surface of the static ring sleeve abuts against the pump body.

[0014] In the sealing structure for connecting the pump body and the motor, the static ring sleeve is made of rubber material, and the static ring is made of ceramic material.

[0015] The present application has the following prominent and beneficial technical effects compared with the prior art:

[0016] The static ring device of the present application adopts the static ring sleeve made of rubber material and the static ring made of ceramic material, so that the rubber material can seal the pump body, the static ring made of ceramic material is matched with the friction ring of the dynamic ring device, the friction ring is made of graphite material, the two are mechanically sealed, and the contact friction force of the two is small due to the graphite material and the ceramic material, thereby prolonging the service life of the static ring device and the dynamic ring device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the present application;

[0018] Figure 2 is a sectional view of the present application;

[0019] Figure 3 is one of the explosion diagrams of the present application;

[0020] Figure 4 is the second explosion diagram of the present application;

[0021] Figure 5It is a simplified structural diagram of the present invention located between the pump body and the motor.

[0022] The meaning of the numbers in the figure:

[0023] 1-static ring device; 2-dynamic ring device; 11-static ring sleeve; 12-static ring; 21-friction ring;

[0024] 22-metal spring; 23-base; 24-guide sleeve; 25-abutting sleeve; 26-sealing ring;

[0025] 231- rubber connecting seat; 232- receiving seat; 233- receiving ring groove; 2321- limiting convex ring;

[0026] 2322-Limiting groove. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with specific embodiments:

[0028] like Figures 1-5 As shown: A sealing structure for connecting a pump body and a motor, comprising a static ring device 1 and a dynamic ring device 2 that contact each other, one end of the static ring device 1 and the dynamic ring device 2 respectively abut against one side of the pump body and the motor, the static ring device 1 and the dynamic ring device 2 are both sleeved on the pump shaft of the water pump, and the dynamic ring device 2 rotates with the pump shaft of the water pump, the dynamic ring device 2 comprises a friction ring 21, a metal spring 22 and a base 23, the two ends of the metal spring 22 respectively abut against the friction ring 21 and the base 23, and the friction ring 21 always abuts against the static ring device 1 with the elastic force of the metal spring 22. Specifically, the metal spring is a spring, and there is a mechanical seal between the static ring device and the dynamic ring device. The overall structure is relatively simple and easy to install.

[0029] In the above-mentioned sealing structure for connecting the pump body and the motor, a guide sleeve 24 is provided at one end of the friction ring 21 facing the metal spring 22, and the metal spring 22 is sleeved on the outside of the guide sleeve 24. A sealing ring 26 is provided on the inside of the friction ring 21. Specifically, the sealing ring is designed to play a sealing role to prevent liquid from leaking from the gap between the friction ring and the motor shaft.

[0030] In the above-mentioned sealing structure for connecting the pump body and the motor, an abutting sleeve 25 is provided at the end of the friction ring 21 facing away from the metal spring 22. The end face of the abutting sleeve 25 is in contact with the stationary ring device 1. The wall thickness h of the abutting sleeve 25 is smaller than the wall thickness H of the friction ring 21. Specifically, this is to ensure that the friction ring can be used normally while reducing the production cost of the friction ring, and also to reduce the contact area between the abutting sleeve and the stationary ring device, thereby ensuring the sealing of the two while ensuring the sealing performance.

[0031] In the sealing structure for connecting the pump body and the motor, the friction ring 21 is made of graphite material, which is used to reduce the abrasion caused by the friction between the friction ring and the static ring device when the motor rotates.

[0032] In the sealing structure for connecting the pump body and the motor, the base 23 comprises a rubber connecting seat 231 and a containing seat 232, the containing seat 232 is sleeved on the outer side of the rubber connecting seat 231, and the containing seat 232 is formed with a containing ring groove 233 for containing part of the metal spring 22, and the inner side of the containing seat 232 is provided with a limiting convex ring 2321, and the outer side of the rubber connecting seat 231 is provided with a limiting concave groove 2322 matched with the limiting convex ring 2321, which is used to ensure that the containing seat can be sleeved on the rubber connecting seat, and the containing seat is made of stainless steel material, which is used to improve the wear resistance of the containing seat. In short, if the whole is made of rubber material, the spring is easy to be damaged by the containing seat when the dynamic ring device rotates with the motor shaft, which shortens the service life of the containing seat.

[0033] In the sealing structure for connecting the pump body and the motor, the static ring device 1 comprises a static ring sleeve 11 and a static ring 12, the static ring sleeve 11 is sleeved on the outer side of the static ring 12, and one side of the static ring sleeve 11 abuts against the pump body, the static ring sleeve 11 is made of rubber material, and the static ring 12 is made of ceramic material, which is used to better fit the outer side of the pump body and play a sealing role, and the static ring is made of ceramic material, which is used to reduce the friction with the friction ring, prolong the contact area of the two, and the outer surfaces of the ceramic and the graphite are relatively smooth, and the contact sealing performance of the two is relatively good. It is worth mentioning that there is a gap between the static ring sleeve and the static ring and the motor shaft, so the static ring sleeve and the static ring will not rotate with the motor shaft, and the static ring sleeve can block some larger sand impurities.

[0034] The above embodiments are only the preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A sealing structure for connecting a pump body and a motor, characterized in that: The invention comprises a static ring device (1) and a dynamic ring device (2) in contact with each other, one end of the static ring device (1) and the dynamic ring device (2) respectively abutting against one side of the pump body and the motor, the static ring device (1) and the dynamic ring device (2) are both sleeved on the pump shaft of the water pump, and the dynamic ring device (2) rotates following the pump shaft of the water pump, the dynamic ring device (2) comprises a friction ring (21), a metal spring (22) and a base (23), the two ends of the metal spring (22) respectively abutting against the friction ring (21) and the base (23), and the friction ring (21) always abuts against the static ring device (1) by means of the elastic force of the metal spring (22).

2. The sealing structure for connecting a pump body and a motor according to claim 1, characterized in that: A guide sleeve (24) is provided at one end of the friction ring (21) facing the metal spring (22), the metal spring (22) is sleeved on the outside of the guide sleeve (24), and a sealing ring (26) is provided on the inside of the friction ring (21).

3. The sealing structure for connecting a pump body and a motor according to claim 1 or 2, characterized in that: An abutting sleeve (25) is provided at one end of the friction ring (21) facing away from the metal spring (22), and an end surface of the abutting sleeve (25) is in contact with the stationary ring device (1).

4. The sealing structure for connecting a pump body and a motor according to claim 3, characterized in that: The wall thickness h of the abutting sleeve (25) is smaller than the wall thickness H of the friction ring (21).

5. The sealing structure for connecting a pump body and a motor according to claim 4, characterized in that: The friction ring (21) is made of graphite material.

6. The sealing structure for connecting a pump body and a motor according to claim 5, characterized in that: The base (23) comprises a rubber connecting seat (231) and a receiving seat (232), wherein the receiving seat (232) is sleeved on the outer side of the rubber connecting seat (231), and a receiving ring groove (233) for receiving part of the metal spring (22) is formed on the receiving seat (232).

7. The sealing structure for connecting a pump body and a motor according to claim 6, characterized in that: A limiting convex ring (2321) is provided on the inner side of the accommodating seat (232), and a limiting groove (2322) used in conjunction with the limiting convex ring (2321) is provided on the outer side of the rubber connecting seat (231).

8. The sealing structure for connecting a pump body and a motor according to claim 7, characterized in that: The accommodating seat (232) is made of stainless steel.

9. The sealing structure for connecting a pump body and a motor according to claim 1 or 2 or 4 or 5 or 6 or 7 or 8, characterized in that: The static ring device (1) comprises a static ring sleeve (11) and a static ring (12), wherein the static ring sleeve (11) is sleeved on the outside of the static ring (12), and one side surface of the static ring sleeve (11) abuts against the pump body.

10. The sealing structure for connecting a pump body and a motor according to claim 9, characterized in that: The static ring sleeve (11) is a structure made of rubber material, and the static ring (12) is a supporting structure made of ceramic material.

Images