A sealing structure for connecting a water pump and a motor

Abstract

The utility model belongs to the technical field of water pump, especially point to a kind of sealing structure for water pump and motor connection, it includes the static ring device and the dynamic ring device of mutual contact, static ring device and dynamic ring device are set on the pump shaft of water pump, dynamic ring device follows the rotation of the pump shaft of water pump, and the one end of static ring device and dynamic ring device respectively abuts in the one side of body and motor, dynamic ring device includes dynamic ring, sealing ring, transmission sleeve, push ring, spring, spring seat and rotary pad, dynamic ring, sealing ring, push ring and bellows spring all are located in transmission sleeve, and sealing ring is located between dynamic ring and push ring, the both ends of bellows spring respectively abut on push ring and spring seat, detachable connection between transmission sleeve and spring seat, rotary pad is located in the side face of spring seat away from static ring device, the dynamic ring device of the utility model follows the rotation of the pump shaft of water pump, static ring device abuts in the one side of pump body, and both adopt mechanical seal, can extend the service life of sealing structure's sealing structure.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology, and specifically refers to a sealing structure for connecting a water pump and a motor. Background Technology

[0002] Currently, water pumps are machines used to transport or pressurize liquids. They transfer the mechanical energy of a prime mover or other external energy to the liquid, increasing its energy. They are mainly used to transport liquids including water, oil, acids and alkalis, emulsions, suspensions, and liquid metals, and can also transport liquid-gas mixtures and liquids containing suspended solids. Technical parameters of water pump performance include flow rate, suction head, discharge head, shaft power, water power, and efficiency. A sealing ring is usually installed between the motor and the pump body. This sealing ring is fixed inside the pump casing and fitted onto the pump shaft, with one end abutting against the pump casing and the other end against the impeller. This prevents liquid from entering the motor and affecting its function. Existing sealing rings often have springs on the outside to keep them pressed tightly against the pump casing and impeller, preventing liquid leakage into the motor. However, in actual use, the impeller rotation causes prolonged friction between the sealing ring and the pump casing, which can easily damage the sealing ring and allow impurities to enter the motor, causing damage. Summary of the Invention

[0003] The purpose of this invention is to create a sealing structure by using a stationary ring device and a rotating ring device at the connection between the motor and the pump body. The rotating ring device rotates with the pump shaft, while the stationary ring device rests against one side of the pump body. Both devices use a mechanical seal, which can extend the service life of the sealing structure.

[0004] The purpose of this utility model is achieved as follows:

[0005] A sealing structure for connecting a water pump and a motor includes a stationary ring device and a rotating ring device that are in contact with each other. The stationary ring device and the rotating ring device are sleeved on the pump shaft of the water pump. The rotating ring device rotates with the pump shaft of the water pump, and one end of the stationary ring device and the rotating ring device respectively abuts against one side of the main body and the motor. The rotating ring device includes a rotating ring, a sealing ring, a transmission sleeve, a push ring, a spring, a spring seat, and a rotating pad. The rotating ring, the sealing ring, the push ring, and the corrugated spring are all located inside the transmission sleeve, and the sealing ring is located between the rotating ring and the push ring. The two ends of the corrugated spring abut against the push ring and the spring seat respectively. The transmission sleeve and the spring seat are detachably connected, and the rotating pad is located on the side of the spring seat away from the stationary ring device.

[0006] In the aforementioned sealing structure for connecting the water pump and motor, the moving ring extends at least partially out of the transmission sleeve and contacts the stationary ring device.

[0007] In the aforementioned sealing structure for connecting the water pump and motor, the moving ring has a stepped shaft structure, and a limiting ring is provided at one end of the transmission sleeve near the stationary ring device. The stepped surface in the middle of the moving ring contacts the inner surface of the limiting ring.

[0008] In the aforementioned sealing structure for connecting the water pump and motor, a retaining plate extends outward from the periphery of the spring seat, and a groove is provided on the transmission sleeve to cooperate with the retaining plate.

[0009] In the aforementioned sealing structure for connecting the water pump and motor, the clamping plate is located at least in two places and is evenly distributed around the periphery of the spring seat.

[0010] In the sealing structure for connecting the water pump and motor described above, the spring is a corrugated spring.

[0011] In the aforementioned sealing structure for connecting the water pump and motor, the stationary ring device includes a stationary ring sleeve and a stationary ring. The stationary ring sleeve is fitted onto the outside of the stationary ring, and one side of the stationary ring sleeve abuts against the pump body.

[0012] In the aforementioned sealing structure for connecting the water pump and motor, one side of the stationary ring extends outward and is bent into a sand-proof sleeve, which covers at least a portion of the transmission sleeve.

[0013] In the aforementioned sealing structure for connecting the water pump and motor, two limiting surfaces are symmetrically arranged inside the rotating pad.

[0014] In the aforementioned sealing structure for connecting the water pump and motor, the moving ring is made of graphite, the stationary ring is made of rubber, and the stationary ring is made of ceramic.

[0015] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0016] The stationary ring device of this utility model uses a stationary ring sleeve made of rubber and a stationary ring made of ceramic. The rubber material can provide a seal between itself and the pump body. The ceramic stationary ring fits into the friction ring of the rotating ring device, which is made of graphite. The two form a mechanical seal. Since one is made of graphite and the other of ceramic, the contact friction between them is small, which can extend the service life of the stationary ring device and the rotating ring device. At the same time, the rotating ring is pressed against the transmission sleeve by a corrugated spring, so that it can make better contact with the stationary ring. The spring is separated by a push ring to prevent the spring from damaging the graphite rotating ring. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention;

[0018] Figure 2 This is a cross-sectional view of Embodiment 1 of this utility model;

[0019] Figure 3 This is an enlarged view of point A in Embodiment 1 of this utility model;

[0020] Figure 4 This is an exploded view of Embodiment 1 of this utility model;

[0021] Figure 5 This is a structural schematic diagram of Embodiment 2 of the present invention;

[0022] Figure 6 This is a cross-sectional view of Embodiment 2 of this utility model.

[0023] The meaning of the labels in the diagram:

[0024] 1-Stationary ring device; 2-Dynamic ring device; 11-Stationary ring sleeve; 12-Stationary ring; 13-Sandproof sleeve; 21-Dynamic ring; 22-Sealing ring; 23-Transmission sleeve; 24-Push ring; 25-Spring; 26-Spring seat; 27-Rotating pad;

[0025] 28-Limiting ring; 29-Stepped surface; 211-Positioning groove; 212-Positioning protrusion; 261-Card plate; 262-Card slot; 271-Limiting surface. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments:

[0027] Example 1, as Figures 1-4 As shown: A sealing structure for connecting a water pump and a motor includes a stationary ring device 1 and a rotating ring device 2 that are in contact with each other. The stationary ring device 1 and the rotating ring device 2 are sleeved on the pump shaft of the water pump. The rotating ring device 2 rotates with the pump shaft of the water pump, and one end of the stationary ring device 1 and the rotating ring device 2 respectively abuts against one side of the pump body and the motor. The rotating ring device 2 includes a rotating ring 21, a sealing ring 22, a transmission sleeve 23, a push ring 24, a spring 25, a spring seat 26, and a rotating pad 27. 1. The sealing ring 22, the push ring 24, and the corrugated spring 25 are all located inside the transmission sleeve 23. The sealing ring 22 is located between the moving ring 21 and the push ring 24. The two ends of the corrugated spring 25 abut against the push ring 24 and the spring seat 26, respectively. The transmission sleeve 23 and the spring seat 26 are detachably connected. The rotating pad 27 is located on the side of the spring seat 26 away from the stationary ring device 1. Specifically, the stationary ring device and the moving ring device are mechanically sealed. The overall structure is relatively simple and easy to install.

[0028] In the above-mentioned sealing structure for connecting the water pump and the motor, the rotating ring 21 extends at least partially out of the transmission sleeve 23 and contacts the stationary ring device 1. Specifically, this is to facilitate contact between the rotating ring and the stationary ring and to achieve a sealing effect. The circumferential ring of the rotating ring is provided with two positioning grooves 211, and the transmission sleeve is provided with positioning protrusions 212 that cooperate with the two positioning grooves. This is to allow the rotating ring and the transmission sleeve to rotate synchronously.

[0029] In the above-mentioned sealing structure for connecting the water pump and motor, the moving ring 21 has a stepped shaft structure, and a limiting ring 28 is provided at one end of the transmission sleeve 23 near the stationary ring device 1. The stepped surface 29 in the middle of the moving ring 21 contacts the inner side of the limiting ring 28. Specifically, this is more conducive to the transmission sleeve transmitting power to the moving ring. The moving ring is provided with a receiving groove for accommodating the sealing ring, and the sealing ring is an O-ring.

[0030] In the sealing structure for connecting the water pump and the motor described above, a retaining plate 261 extends outward from the periphery of the spring seat 26, and a retaining groove 262 is provided on the transmission sleeve 23 to cooperate with the retaining plate 261. There are at least two retaining plates 261, which are evenly distributed on the periphery of the spring seat 26. Specifically, this is to facilitate installation and disassembly.

[0031] In the sealing structure for connecting the water pump and motor described above, the spring 25 is a corrugated spring. Specifically, this ensures that the push ring is subjected to uniform force and extends the service life of the moving ring.

[0032] In the aforementioned sealing structure for connecting the water pump and motor, the stationary ring device 1 includes a stationary ring sleeve 11 and a stationary ring 12. The stationary ring sleeve 11 is fitted onto the outside of the stationary ring 12, and one side of the stationary ring sleeve 11 abuts against the pump body. The moving ring 21 is made of graphite, the stationary ring sleeve 11 is made of rubber, and the stationary ring 12 is made of ceramic. The stationary ring sleeve is made of rubber to better fit the outer side of the pump body and provide a sealing effect, while the stationary ring is made of ceramic to reduce friction with the friction ring and extend the contact area between the two. Furthermore, the outer surfaces of both ceramic and graphite are relatively smooth, resulting in relatively good contact sealing performance.

[0033] Example 2 is basically the same as Example 1, except that, as Figure 5 and Figure 6As shown: One side of the stationary ring sleeve 11 extends outward and is bent to form a sand-proof sleeve 13. The sand-proof sleeve 13 covers at least part of the transmission sleeve 23. The sand-proof sleeve is specifically designed to block some larger mud and sand impurities. Two limiting surfaces 271 are symmetrically arranged inside the rotating pad 27. Specifically, this is to further allow the rotating pad to rotate with the pump shaft. One end of the sand-proof sleeve on the transmission sleeve has a contact ring that protrudes inward. The contact area of ​​the contact ring is designed to be small and will not drive the stationary ring to rotate.

[0034] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A sealing structure for connecting a water pump and a motor, characterized in that: The pump includes a stationary ring device (1) and a rotating ring device (2) that are in contact with each other. The stationary ring device (1) and the rotating ring device (2) are sleeved on the pump shaft of the water pump. The rotating ring device (2) rotates with the pump shaft of the water pump. One end of the stationary ring device (1) and the rotating ring device (2) respectively abuts against one side of the main body and the motor. The rotating ring device (2) includes a rotating ring (21), a sealing ring (22), a transmission sleeve (23), a push ring (24), a spring (25), a spring seat (26), and a rotating pad (27). The moving ring (21), sealing ring (22), push ring (24) and corrugated spring (25) are all located inside the transmission sleeve (23), and the sealing ring (22) is located between the moving ring (21) and the push ring (24). The two ends of the corrugated spring (25) abut against the push ring (24) and the spring seat (26) respectively. The transmission sleeve (23) and the spring seat (26) are detachably connected. The rotating pad (27) is located on the side of the spring seat (26) away from the stationary ring device (1).

2. The sealing structure for connecting the water pump and motor according to claim 1, characterized in that: The moving ring (21) extends at least partially out of the transmission sleeve (23) and contacts the stationary ring device (1).

3. The sealing structure for connecting the water pump and motor according to claim 2, characterized in that: The moving ring (21) has a stepped shaft structure. The transmission sleeve (23) is provided with a limiting ring (28) at one end near the stationary ring device (1). The stepped surface (29) in the middle of the moving ring (21) is in contact with the inner side of the limiting ring (28).

4. The sealing structure for connecting the water pump and motor according to claim 1, characterized in that: The spring seat (26) has a retaining plate (261) extending outward from its periphery, and the transmission sleeve (23) is provided with a retaining groove (262) that cooperates with the retaining plate (261).

5. The sealing structure for connecting the water pump and motor according to claim 4, characterized in that: The card plate (261) is located in at least two places and is evenly distributed around the periphery of the spring seat (26).

6. The sealing structure for connecting the water pump and motor according to claim 1, characterized in that: The spring (25) is a corrugated spring.

7. The sealing structure for connecting a water pump and a motor according to claim 1, 2, 3, 4, 5, or 6, characterized in that: The stationary ring device (1) includes a stationary ring sleeve (11) and a stationary ring (12). The stationary ring sleeve (11) is sleeved on the outside of the stationary ring (12), and one side of the stationary ring sleeve (11) abuts against the pump body.

8. The sealing structure for connecting the water pump and motor according to claim 7, characterized in that: The stationary ring sleeve (11) extends outward and is bent to form a sandproof sleeve (13), which covers at least part of the transmission sleeve (23).

9. The sealing structure for connecting a water pump and a motor according to claim 8, characterized in that: Two limiting surfaces (271) are symmetrically arranged inside the rotating pad (27).

10. The sealing structure for connecting the water pump and the motor according to claim 7, characterized in that: The moving ring (21) is made of graphite, the stationary ring sleeve (11) is made of rubber, and the stationary ring (12) is made of ceramic.

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