Water pump motor capable of preventing water from entering

Abstract

A water inlet prevention water pump motor comprises a pump body, a water inlet cavity formed in the pump body and an impeller located in the pump body, a motor shell is arranged above the pump body, a motor shaft is arranged at the center in the motor shell, the lower end of the motor shaft downwards penetrates into the water inlet cavity and is connected with the impeller, and a water separation base is arranged between the lower end of the motor shell and the upper end of the pump body; a motor opening communicated with the internal space of the motor shell is formed in the center of the lower end surface of the motor shell; an upper sealing part matched with a motor opening is arranged on the upper surface of the waterproof seat; a pump body opening communicated with the water inlet cavity is formed in the center of the upper end surface of the pump body; a lower sealing part matched with the opening of the pump body is arranged on the lower surface of the waterproof seat; the upper sealing part and the lower sealing part are annular; a boss is arranged in the center of the upper end face of the waterproof base. The water-inflow-preventing water pump motor can effectively avoid the situation of sealing failure caused by elasticity weakening of the sealing ring, and the water inflow-preventing effect is effectively achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a water pump motor, in particular to a water -proof water pump motor. BACKGROUND

[0002] The submersible pump is a kind of water pump, when using, the whole submersible pump is sunk into water, at this time, water pump motor is in water, therefore, the sealing property of water pump motor is extremely important, when submersible pump operates, motor shaft of water pump motor will be inserted into the pump body of submersible pump and is connected with impeller, thus, the position that water pump motor needs to be sealed is the position that motor shaft is out of motor shell, in order to guarantee the sealing property of the position, generally, corresponding sealing ring is arranged, and sealing ring is rubber material, in long-term certain water pressure environment, sealing ring is prone to the condition that elasticity weakens due to aging, at this time, the fit degree of sealing surface of sealing ring will drop, finally, the sealing property effect of sealing ring is influenced, leading to the water flow of outside into motor, and the internal components of motor are extremely prone to damage. SUMMARY

[0003] The utility model solves the prior art problems to provide a kind of water -proof water pump motor, it can effectively avoid the condition that sealing failure due to sealing ring elasticity weakens, effectively play water -proof effect.

[0004] The technical scheme that the utility model solves above-mentioned technical problem is as follows:

[0005] The utility model discloses a kind of water -proof water pump motor, including pump body, the water inlet cavity in pump body and the impeller in pump body, pump body upper end has motor shell, motor shell inner center has motor shaft, motor shaft lower end is inserted into water inlet cavity and is connected with impeller downwards, the water seat between the lower end of motor shell and the upper end of pump body is equipped with;The upper end surface of the water seat is equipped with a motor opening with its internal space is through;The upper surface of the water seat is equipped with the upper sealing part matched with the motor opening;The upper end surface of the pump body is equipped with the pump body opening through with water inlet cavity;The lower surface of the water seat is equipped with the lower sealing part matched with the pump body opening;The upper sealing part and the lower sealing part are annular;The upper end surface of the water seat is equipped with a boss;The boss upper end surface is equipped with a shaft hole axially through water seat, motor shaft passes through shaft hole;The lower part in shaft hole is equipped with the first sealing structure matched with motor shaft;The water seat is equipped with a annular water absorption cavity;Water absorption sponge matched with it is placed in the water absorption cavity;The middle wall of shaft hole is equipped with a annular auxiliary groove, auxiliary groove is through with water absorption cavity, auxiliary groove height is greater than water absorption cavity height;The auxiliary groove is equipped with the second sealing structure matched with it;The boss upper end is equipped with the third sealing structure matched with motor shaft.

[0006] The first sealing structure comprises a water guide cone surface arranged on the inner wall of the lower end of the shaft hole, the water guide cone surface is narrow at the top and wide at the bottom; the inner wall of the lower part of the shaft hole is provided with a first sealing groove in the shape of a ring; the first sealing groove is provided with a first sealing ring matched therewith, the first sealing ring is made of rubber; the lower surface of the first sealing ring is provided with a water storage groove in the shape of a ring; the lower side of the water storage groove is provided with a shielding part in the shape of a ring, the shielding part is shielded in the lower side of the water storage groove; when the water flow in the water inlet cavity enters the lower end of the shaft hole along the water guide cone surface, the water flow can enter the water storage groove through the lower side of the water storage groove.

[0007] The second sealing structure comprises a graphite sleeve arranged in the auxiliary groove, the motor shaft passes through the graphite sleeve; the upper end surface of the graphite sleeve is attached to the upper side of the groove wall of the auxiliary groove, and the lower end surface of the graphite sleeve is attached to the lower side of the groove wall of the auxiliary groove; the outer wall of the graphite sleeve at the upper end and the lower end is provided with a second sealing groove in the shape of a ring; the second sealing groove is provided with a second sealing ring matched therewith, the second sealing ring is made of rubber; one end surface of the second sealing ring is attached to one side of the groove wall adjacent to the middle part of the graphite sleeve, and the other end surface of the second sealing ring is provided with a gasket attached thereto; the side of the groove wall of the second sealing groove away from the middle part of the graphite sleeve is provided with a plurality of first embedded holes uniformly distributed in a circle; the gasket is provided with a plurality of second embedded holes opposite to the first embedded holes; a pressure spring is arranged between the bottom of the first embedded hole and the bottom of the second embedded hole, and the pressure spring is in a compressed state.

[0008] The third sealing structure comprises a bearing groove arranged on the inner wall of the upper end of the shaft hole, the bearing groove is in the shape of a ring; the bearing groove is provided with a bearing sleeved outside the motor shaft; the inner wall of the upper side of the bearing groove is provided with a clamping groove in the shape of a ring; the clamping groove is provided with a clamping spring matched therewith, the inner edge of the clamping spring protrudes inward into the bearing groove and is attached to the upper surface of the bearing; the upper end of the boss is externally screwed with an adjusting cover matched therewith; the center of the adjusting cover is provided with a through hole, the motor shaft passes through the through hole; the upper side of the bearing groove is provided with a ring-shaped pad sleeved outside the motor shaft; the upper end of the ring-shaped pad is provided with a limiting part attached to the upper end surface of the boss; the upper surface of the ring-shaped pad is provided with a third sealing ring attached thereto, the third sealing ring is made of rubber; the inner wall of the third sealing ring is attached to the outer wall of the motor shaft, and the outer wall of the third sealing ring is attached to the inner wall of the adjusting cover; the upper surface of the third sealing ring is provided with a self-adjusting groove in the shape of a ring; the adjusting cover is provided with a self-adjusting structure matched with the self-adjusting groove.

[0009] The self-adjusting structure comprises a self-adjusting block arranged in a self-adjusting groove, and the self-adjusting block is annular; an inner taper surface in a shape of narrow at the top and wide at the bottom is arranged on the inner wall of the self-adjusting block, and an outer taper surface in a shape of wide at the top and narrow at the bottom is arranged on the outer wall of the self-adjusting block; the inner taper surface and the outer taper surface are in close contact with the groove wall of the self-adjusting groove; the lower end surface of the self-adjusting block has a movable spacing with the groove bottom of the self-adjusting groove; a plurality of screw holes penetrating the inner space of the adjusting cover are arranged on the upper surface of the adjusting cover; a plurality of guide holes corresponding to the positions of the screw holes are arranged on the upper surface of the self-adjusting block; a guide rod matched with the screw holes is screwed in the screw holes, and the lower end of the guide rod penetrates into the guide hole downward; an adjusting spring is arranged between the upper side inner wall of the adjusting cover and the upper surface of the self-adjusting block, and the adjusting spring is in a compressed state; and a rotating head in close contact with the upper side outer wall of the adjusting cover is arranged on the upper end of the guide rod.

[0010] The upper end of the water-proof seat and the lower end of the motor shell, and the lower end of the water-proof seat and the upper end of the pump body are fixed by a plurality of fixing screws.

[0011] The outer wall of the upper sealing part and the outer wall of the lower sealing part are both provided with a fourth sealing groove in a ring shape; and a fourth sealing ring matched with the fourth sealing groove is arranged in the fourth sealing groove.

[0012] The utility model discloses the beneficial effect is:

[0013] Compared with the prior art, the water inlet prevention pump motor adopting the structure of the utility model can increase the spacing between the motor shell and the pump body through the water-proof seat, thereby prolonging the travel of water leakage, and the first sealing structure, the second sealing structure and the third sealing structure are arranged in the travel of water leakage, three seals are formed, even if one of the seals fails, the other two seals can still play the effect of preventing water inlet, at the same time, the sealing effect of the first sealing ring, the second sealing ring and the third sealing ring can be ensured after the elasticity of the first sealing ring, the second sealing ring and the third sealing ring is weakened due to aging, and water inlet in the motor shell is avoided to the maximum extent, and the effect of preventing water inlet is effectively played. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 Is the sectional view of the water inlet prevention pump motor of the utility model;

[0015] Figure 2 Is Figure 1 The enlarged view of A of

[0016] Figure 3 Is Figure 1 The enlarged view of B of DETAILED DESCRIPTION

[0017] The application will be further described in detail in combination with the drawings and specific embodiments:

[0018] Please refer toFigures 1 to 3 The utility model provides a kind of anti-water pump motor, including pump body 1, be located in the water inlet cavity 2 of pump body 1 and the impeller 3 in pump body 1, pump body 1 top has motor shell 4, motor shell 4 inside center has motor shaft 5, motor shaft 5 lower end is downward and is connected with impeller 3 by being penetrated into water inlet cavity 2, the lower end of motor shell 4 is equipped with a water barrier seat 6 between pump body 1 upper end;The lower end surface of motor shell 4 is equipped with a motor opening 7 with its internal space being through;The upper surface of water barrier seat 6 is equipped with the upper sealing part 8 matched with motor opening 7;The upper end surface of pump body 1 is equipped with the pump body opening 9 with water inlet cavity 2 being through;The lower surface of water barrier seat 6 is equipped with the lower sealing part 10 matched with pump body opening 9;The upper sealing part 8 and lower sealing part 10 are annular;The upper end surface of water barrier seat 6 is equipped with a boss 11;The upper end surface of boss 11 is equipped with a shaft hole 12 axially through water barrier seat, and motor shaft 5 is passed through shaft hole 12;The lower part of shaft hole 12 is equipped with the first sealing structure matched with motor shaft 5;Water barrier seat 6 is equipped with a annular water absorption cavity 13;Water absorption cavity 13 is inbuilt and is equipped with water absorption sponge 14 matched with it;The inner wall of the middle part of shaft hole 12 is equipped with a annular auxiliary groove 15, and auxiliary groove 15 is through with water absorption cavity 13, and the height of auxiliary groove 15 is greater than the height of water absorption cavity 13;The auxiliary groove 15 is equipped with the second sealing structure matched with it;The upper end of boss 11 is equipped with the third sealing structure matched with motor shaft 5.

[0019] The first sealing structure includes water guide conical surface 16 equipped in the inner wall of the lower end orifice of shaft hole 12, and water guide conical surface 16 is narrow on top and wide on bottom;The inner wall of the lower part of shaft hole 12 is equipped with a annular first sealing groove 17;The first sealing groove 17 is equipped with the first sealing ring 18 matched with it, and the first sealing ring 18 is of rubber material;The lower surface of first sealing ring 18 is equipped with a annular water storage groove 19;The lower side groove of water storage groove 19 is equipped with a annular shielding part 20, and shielding part 20 is shielded in the lower side groove of water storage groove 19;When the water flow in water inlet cavity 2 enters the lower end orifice of shaft hole 12 along water guide conical surface 16, it can enter water storage groove 19 by the lower side groove of water storage groove 19.

[0020] The second sealing structure includes a graphite sleeve 21 disposed within an auxiliary groove 15, through which the motor shaft 5 passes; the upper end face of the graphite sleeve 21 is in contact with the upper side wall of the auxiliary groove 15, and the lower end face of the graphite sleeve 21 is in contact with the lower side wall of the auxiliary groove 15; both the upper and lower outer walls of the graphite sleeve 21 are provided with annular second sealing grooves 22; a matching second sealing ring 23 is provided within the second sealing groove 22, the second sealing ring 23 being made of rubber; one end face of the second sealing ring 23 is... The second sealing groove 22 is attached to one side of the groove wall adjacent to the middle of the graphite sleeve 21, and the other end face of the second sealing ring 23 is provided with a washer 24 attached to it; the second sealing groove 22 is provided with a plurality of first embedded holes 25 evenly distributed in a circle on one side of the groove wall away from the middle of the graphite sleeve 21; the washer 24 is provided with a plurality of second embedded holes 26 opposite to the first embedded holes 25; a pressure spring 27 is provided between the bottom of the first embedded hole 25 and the bottom of the second embedded hole 26, and the pressure spring 27 is in a compressed state.

[0021] The third sealing structure includes a bearing groove 28 located on the inner wall of the upper end of the shaft hole 12, the bearing groove 28 being annular; a bearing 29 fitted over the motor shaft 5 is provided inside the bearing groove 28; an annular retaining groove 30 is provided on the inner wall of the upper opening of the bearing groove 28; a matching retaining spring 31 is provided inside the retaining groove 30, the inner edge of the retaining spring 31 protruding inward into the bearing groove 28 and fitting against the upper surface of the bearing 29; an adjusting cover 32 matching the adjusting cover 32 is screwed to the upper end of the boss 11; a through hole 33 is provided in the center of the adjusting cover 32, through which the motor shaft 5 passes; the bearing groove 28... An annular pad 34 is provided inside the upper slot of the 8, which is attached to the motor shaft 5. The outer wall of the upper end of the annular pad 34 is provided with a limiting part 35 that fits against the upper end face of the boss 11. The upper surface of the annular pad 34 is provided with a third sealing ring 36 that fits against it. The third sealing ring 36 is made of rubber. The inner wall of the third sealing ring 36 fits against the outer wall of the motor shaft 5, and the outer wall of the third sealing ring 36 fits against the inner wall of the adjusting cover 32. The upper surface of the third sealing ring 36 is provided with an annular self-adjusting groove 37. The adjusting cover 32 is provided with a self-adjusting structure that matches the self-adjusting groove 37.

[0022] The self-adjusting structure includes a self-adjusting block 38 disposed within the self-adjusting groove 37, the self-adjusting block 38 being annular; the inner wall of the self-adjusting block 38 is provided with an inner conical surface 39 that is narrower at the top and wider at the bottom, and the outer wall of the self-adjusting block 38 is provided with an outer conical surface 40 that is wider at the top and narrower at the bottom; both the inner conical surface 39 and the outer conical surface 40 are in contact with the groove wall of the self-adjusting groove 37; there is a movable gap 41 between the lower end face of the self-adjusting block 38 and the bottom of the self-adjusting groove 37; the upper surface of the adjusting cover 32 is provided with several protrusions that communicate with its internal space. The screw hole 42; the upper surface of the self-adjusting block 38 is provided with a plurality of guide holes 43 corresponding to the position of the screw hole 42; a matching guide rod 44 is screwed into the screw hole 42, and the lower end of the guide rod 44 passes downward into the guide hole 43; an adjusting spring 45 is provided between the upper inner wall of the adjusting cover 32 and the upper surface of the self-adjusting block 38, which is sleeved on the guide rod 44 and is in a compressed state; the upper end of the guide rod 44 is provided with a rotating head 46 that fits against the upper outer wall of the adjusting cover 32.

[0023] The upper end of the water-separating seat 6 is fixed to the lower end of the motor housing 4, and the lower end of the water-separating seat 6 is fixed to the upper end of the pump body 1 by a number of fixing screws 47.

[0024] Both the outer wall of the upper sealing part 8 and the outer wall of the lower sealing part 10 are provided with an annular fourth sealing groove 48; a matching fourth sealing ring 49 is provided in the fourth sealing groove 48.

[0025] The method of using this utility model is as follows:

[0026] When the motor is running, the motor shaft 5 drives the impeller 3 to rotate in the water inlet chamber 2. At this time, the presence of the bearing 29 and the graphite sleeve 21 can effectively ensure the smooth rotation of the motor shaft 5. When the water pump is submerged in water, the water flow will enter the water inlet chamber 2 through the water inlet hole at the bottom of the pump body 1, filling the water inlet chamber 2 with water. As the impeller 3 rotates, the external water flow will be continuously drawn into the water inlet chamber 2 and flow out from the water outlet connector on the pump body 1. Finally, it will be transported to the actual required location through the pipeline connected to the water outlet connector.

[0027] As water continuously flows into the inlet chamber 2, a portion of the water flows along the trajectory of the guide cone surface 16 into the lower end opening of the shaft hole 12, and then enters the water storage tank 19 through the lower opening of the storage tank 19. As water continues to flow into the storage tank 19, the water pressure inside the storage tank 19 increases. The shielding part 20 blocks the lower opening of the storage tank 19, which can block the water flow outward in the storage tank 19, further ensuring the water pressure inside the storage tank 19. When the water pressure in the water storage tank 19 increases, it will squeeze the tank wall of the water storage tank 19, causing the first sealing ring 18 to expand outward. This will cause the inner wall of the first sealing ring 18 to further fit against the outer wall of the motor shaft 5, and the outer wall of the first sealing ring 18 to further fit against the inner circumferential surface of the first sealing groove 17. Even if the elasticity of the first sealing ring 18 weakens due to aging, the water pressure in the water storage tank 19 can still ensure the fit of the sealing surface of the first sealing ring 18.

[0028] The graphite sleeve 21 not only ensures the smooth rotation of the motor shaft 5, but also guarantees the seal between its inner wall and the outer wall of the motor shaft 5. It also seals the water suction chamber 13. If water flows through the seal of the first sealing ring 18, it will be directly blocked by the graphite sleeve 21. Simultaneously, the presence of the second sealing ring 23 effectively ensures the seal between the outer wall of the graphite sleeve 21 and the inner wall of the auxiliary groove 15. If the second sealing ring 23 weakens due to aging, the compressed pressure spring 27 will open and push the washer 24, utilizing... The gasket 24 compresses the second sealing ring 23, thereby making the inner wall of the second sealing ring 23 further fit against the inner circumferential surface of the second sealing groove 22, and making the outer wall of the second sealing ring 23 further fit against the inner circumferential surface of the auxiliary groove 15. This effectively prevents the second sealing ring 23 from failing to seal. If the seal of the second sealing ring 23 at the lower part of the graphite sleeve 21 is still breached, the water will penetrate to the position where the water absorption chamber 13 and the auxiliary groove 15 intersect, and be absorbed by the water-absorbing sponge in the water absorption chamber 13, thereby preventing the water from continuing to penetrate upward and further improving the water-proof effect.

[0029] If water seeps into the third sealing structure, the third sealing ring 36 will effectively block the water flow, preventing it from leaking into the motor housing 4. If the third sealing ring 36 weakens due to aging, the compressed adjusting spring 45 will use its own elasticity to push the self-adjusting block 38 downward. At this time, the self-adjusting block 38 will squeeze the self-adjusting groove wall through the inner conical surface 39 and the outer conical surface 40, thereby expanding the third sealing ring 36. This will cause the inner wall of the third sealing ring 36 to further fit against the outer wall of the motor shaft 5, and the outer wall of the third sealing ring 36 to further fit against the inner circumferential surface of the adjusting cover 32, ensuring the sealing effect of the third sealing ring 36 and preventing the seal formed by the third sealing ring 36 from failing.

[0030] In summary, this utility model can increase the distance between the motor housing 4 and the pump body 1 by increasing the water-proof seat 6, thereby extending the water leakage stroke. A first sealing structure, a second sealing structure, and a third sealing structure are respectively set in the water leakage stroke to form three seals. Even if one seal fails, the other two seals can still prevent water ingress. At the same time, even after the first sealing ring 18, the second sealing ring 23, and the third sealing ring 36 lose elasticity due to aging, the sealing effect of the first sealing ring 18, the second sealing ring 23, and the third sealing ring 36 is always maintained, maximizing the prevention of water ingress into the motor housing 4 and effectively preventing water from entering.

[0031] The upper end of the water-proof seat 6 is fixed to the lower end of the motor housing 4, and the lower end of the water-proof seat 6 is fixed to the upper end of the pump body 1 by several fixing screws 47. This fixing method facilitates the disassembly and assembly of the water-proof seat 6 and the motor housing 4, and the water-proof seat 6 and the pump body 1.

[0032] Both the outer wall of the upper sealing part 8 and the outer wall of the lower sealing part 10 are provided with an annular fourth sealing groove 48. The fourth sealing groove 48 is provided with a matching fourth sealing ring 49. The presence of the fourth sealing ring 49 can further ensure the sealing between the outer wall of the upper sealing part 8 and the inner wall of the motor opening 7, and the sealing between the outer wall of the lower sealing part 10 and the inner wall of the pump body opening 9.

Claims

1. A water pump motor designed to prevent water ingress, comprising a pump body, an inlet chamber disposed within the pump body, and an impeller located within the pump body, wherein a motor housing is located above the pump body, and a motor shaft is located at the center of the motor housing, the lower end of which passes downward into the inlet chamber and is connected to the impeller, characterized in that: A water-separating seat is provided between the lower end of the motor housing and the upper end of the pump body; a motor opening communicating with its internal space is provided at the center of the lower end face of the motor housing; an upper sealing part matching the motor opening is provided on the upper surface of the water-separating seat; a pump body opening communicating with the water inlet chamber is provided at the center of the upper end face of the pump body; a lower sealing part matching the pump body opening is provided on the lower surface of the water-separating seat; both the upper and lower sealing parts are annular; a boss is provided at the center of the upper end face of the water-separating seat; an axially penetrating shaft hole is provided at the center of the upper end face of the boss, through which the motor shaft passes; a first sealing structure matching the motor shaft is provided in the lower part of the shaft hole; an annular water suction chamber is provided inside the water-separating seat; a matching water-absorbing sponge is placed inside the water suction chamber; an annular auxiliary groove is provided on the inner wall of the middle part of the shaft hole, communicating with the water suction chamber, and the height of the auxiliary groove is greater than the height of the water suction chamber; a second sealing structure matching the auxiliary groove is provided in the auxiliary groove; a third sealing structure matching the motor shaft is provided at the upper end of the boss.

2. The anti-ingress water pump motor according to claim 1, characterized in that: The first sealing structure includes a water-guiding cone surface disposed on the inner wall of the lower end opening of the shaft hole, the water-guiding cone surface being narrower at the top and wider at the bottom; the lower inner wall of the shaft hole is provided with an annular first sealing groove; a matching first sealing ring is provided in the first sealing groove, the first sealing ring being made of rubber; an annular water storage tank is provided on the lower surface of the first sealing ring; an annular blocking part is provided on the lower side opening of the water storage tank, the blocking part blocking the lower side opening of the water storage tank; when the water in the water inlet cavity enters the lower end opening of the shaft hole along the water-guiding cone surface, it can enter the water storage tank through the lower side opening of the water storage tank.

3. The anti-ingress water pump motor according to claim 1, characterized in that: The second sealing structure includes a graphite sleeve disposed within an auxiliary groove, through which the motor shaft passes. The upper end face of the graphite sleeve is in contact with the upper wall of the auxiliary groove, and the lower end face of the graphite sleeve is in contact with the lower wall of the auxiliary groove. Both the upper and lower outer walls of the graphite sleeve are provided with annular second sealing grooves. A matching second sealing ring, made of rubber, is disposed within the second sealing groove. One end face of the second sealing ring is in contact with one side of the groove wall near the middle of the graphite sleeve, and the other end face of the second sealing ring is provided with a gasket that is in contact with it. A plurality of circumferentially evenly distributed first embedding holes are provided on the side wall of the second sealing groove away from the middle of the graphite sleeve. The gasket is provided with a plurality of second embedding holes opposite to the first embedding holes. A pressure spring is disposed between the bottom of the first embedding hole and the bottom of the second embedding hole, and the pressure spring is in a compressed state.

4. A water pump motor for preventing water ingress according to claim 1, characterized in that: The third sealing structure includes a bearing groove on the inner wall of the upper end of the shaft hole, the bearing groove being annular; a bearing fitted onto the motor shaft is disposed within the bearing groove; an annular retaining groove is provided on the inner wall of the upper opening of the bearing groove; a matching retaining spring is provided within the retaining groove, the inner edge of the retaining spring protruding inward into the bearing groove and fitting against the upper surface of the bearing; an adjusting cover matching the retaining spring is screwed onto the upper end of the protrusion; a through hole is provided in the center of the adjusting cover, through which the motor shaft passes; an annular pad fitted onto the motor shaft is disposed within the upper opening of the bearing groove; a limiting part is provided on the outer wall of the upper end of the annular pad, fitting against the upper surface of the protrusion; a third sealing ring, made of rubber, is provided on the upper surface of the annular pad; the inner wall of the third sealing ring fits against the outer wall of the motor shaft, and the outer wall of the third sealing ring fits against the inner wall of the adjusting cover; an annular self-adjusting groove is provided on the upper surface of the third sealing ring; a self-adjusting structure matching the self-adjusting groove is provided on the adjusting cover.

5. A water pump motor for preventing water ingress according to claim 4, characterized in that: The self-adjusting structure includes a self-adjusting block disposed within a self-adjusting groove, the self-adjusting block being annular; the inner wall of the self-adjusting block has an inner conical surface that is narrower at the top and wider at the bottom, and the outer wall of the self-adjusting block has an outer conical surface that is wider at the top and narrower at the bottom; both the inner and outer conical surfaces are in contact with the groove wall of the self-adjusting groove; there is a movable gap between the lower end face of the self-adjusting block and the bottom of the self-adjusting groove; the upper surface of the adjusting cover has several screw holes that communicate with its internal space; the upper surface of the self-adjusting block has several guide holes corresponding to the positions of the screw holes; a matching guide rod is screwed into the screw hole, the lower end of the guide rod extending downward into the guide hole; an adjusting spring is disposed between the upper inner wall of the adjusting cover and the upper surface of the self-adjusting block, the adjusting spring being compressed; the upper end of the guide rod has a rotating head that is in contact with the upper outer wall of the adjusting cover.

6. A water pump motor for preventing water ingress according to claim 1, characterized in that: The upper end of the water-proof seat is fixed to the lower end of the motor housing, and the lower end of the water-proof seat is fixed to the upper end of the pump body by several fixing screws.

7. A water pump motor for preventing water ingress according to claim 1, characterized in that: Both the outer wall of the upper sealing part and the outer wall of the lower sealing part are provided with a fourth sealing groove in an annular shape; a fourth sealing ring matching the groove is provided inside the fourth sealing groove.

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