Leakage-proof structure for oil seal of water pump assembly

Abstract

The utility model relates to a water pump assembly oil seal leakproof structure which comprises limiting pieces, the limiting pieces are distributed between the upper end face of an oil seal and the lower end face of a control valve, and the lower ends of the limiting pieces make contact with the upper end face of the oil seal so as to limit the oil seal. According to the oil seal anti-leakage structure of the water pump assembly, the limiting piece is additionally arranged between the control valve and the oil seal, the oil seal is limited, and the problem that in the prior art, leakage is prone to occurring at the oil seal position of the water pump assembly is solved.

Description

Technical Field

[0001] The utility model particularly relates to an oil seal anti-leakage structure of a water pump assembly. Background Art

[0002] In the cooling system of automobiles and industrial equipment, the water pump is a core component responsible for circulating the coolant to the engine or other parts that need cooling to maintain the normal operating temperature of the system. The water pump assembly is usually composed of key components such as the pump body, impeller, bearing, ball valve, oil seal and drive mechanism. Among them, the oil seal is a key component to prevent coolant leakage, and its performance is directly related to the working efficiency and reliability of the water pump.

[0003] The oil seal design in the traditional water pump assembly is usually made of elastic materials such as rubber, installed between the shaft end and the pump body, and forms a seal through extrusion deformation. When the water pump is working, the ball valve needs to rotate, and the ball valve will float up and down along its own axis when rotating. Over time, there will be a gap between the ball valve and the oil seal, and the oil seal is easily displaced by the ball valve, causing the oil seal to fail and leak. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an anti-leakage structure for the oil seal of a water pump assembly in view of the deficiencies of the above-mentioned prior art, to add a limiter between the control valve and the oil seal to limit the oil seal, thereby solving the problem that the water pump assembly in the prior art is very prone to leakage at the oil seal.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a water pump assembly oil seal anti-leakage structure, characterized in that it includes a limiter, the limiter is distributed between the upper end surface of the oil seal and the lower end surface of the control valve, and the lower end of the limiter contacts the upper end surface of the oil seal to limit the oil seal.

[0006] By adopting the above technical solution, a limiter is added between the control valve and the oil seal to limit the oil seal. When the control valve is working, the limiter can resist the oil seal, thereby compensating for the gap between the oil seal and the control valve. The control valve will not move up and down, and the oil seal will not change position, so there will be no leakage, which solves the problem of the water pump assembly in the prior art that it is very easy to leak at the oil seal.

[0007] The above-mentioned water pump assembly oil seal anti-leakage structure can be further configured as follows: the limiter includes a valve stem sleeve hole provided in the middle portion and sleeved on the outer periphery of the valve stem of the control valve, and the upper end surface of the limiter contacts the end surface of the control valve.

[0008] With the above technical solution, on the one hand, the limiting member and the water pump assembly are designed as separate parts, so that the production mold of the water pump assembly does not need to be changed, which is convenient for the processing and production of the water pump assembly. At the same time, it is also convenient for the assembly of the oil seal, the limiting member and the control valve. On the other hand, a valve stem sleeve hole is provided in the middle of the limiting member to guide and position the limiting member. At the same time, when the limiting member shifts left and right, and the axial length of the limiting member is reasonably controlled during processing, the upper end surface of the limiting member can be made to contact the control valve, and the lower end surface can be made to contact the oil seal. In this way, when the control valve rotates, even if the oil seal (because it is made of elastic material) deforms, the control valve will not float excessively up and down, and the oil seal will not be driven to move, thus avoiding leakage at the oil seal.

[0009] The above-mentioned anti-leakage structure of the oil seal of the water pump assembly can be further set as follows: a sinking groove recessed towards the control valve is provided in the middle of the end surface of the limiting member facing the oil seal.

[0010] With the above technical solution, when a strip-shaped sealing strip or rib is provided on the upper end surface of the oil seal, the sealing strip located in the middle of the oil seal can be inserted into the sinking groove. When the oil seal is deformed by extrusion, the sealing strip will deform towards the valve stem side under the action of the sinking groove, thereby improving the sealing performance and achieving a better sealing effect.

[0011] The above-mentioned anti-leakage structure of the oil seal of the water pump assembly can be further set as follows: the limiting member is in the shape of a cylinder, a polygonal prism or a cone. When the limiting member is a cone, the small end of the limiting member faces the control valve and the large end faces the oil seal.

[0012] With the above technical solution, due to the different specifications and types of the control valves, the structures at the contact parts between the control valves and the limiting members are different. The limiting member can be selectively processed into a cylinder, a polygonal prism or a cone according to different specifications and types of the control valves. The purpose of "when the limiting member is a cone, the small end of the limiting member faces the control valve and the large end faces the oil seal" is that when the control valve rotates, the friction between the limiting member and the oil seal is relatively large, so the limiting member will not rotate. By facing the small end towards the control valve, the friction between the control valve and the oil seal can be reduced, the control valve can rotate normally, and the limiting member can stably limit the oil seal.

[0013] The above-mentioned anti-leakage structure of the oil seal of the water pump assembly can be further set as follows: when the limiting member is a cone, the cross-section of the limiting member along the direction perpendicular to the central axis of the valve stem sleeve hole is circular or polygonal.

[0014] With the above technical solution, when the limiting member is a cone, polygons can be machined on the outer peripheral surface of the cone. Whether it is a simple cone or a polygon, the oil seal can be limited, and the problem of leakage can be solved.

[0015] The above-mentioned anti-leakage structure of the oil seal of the water pump assembly can be further set as follows: The limiting member is a stop block, one end of the stop block is fixed inside the housing of the water pump assembly, and the other end of the stop block extends to the upper end of the oil seal and contacts the upper end of the oil seal to limit the oil seal.

[0016] With the above technical solution, the limiting member can be integrally formed with the water pump assembly, that is, by changing the processing mold of the water pump assembly, directly processing the housing of the water pump assembly with the limiting member. After the oil seal is installed, it can be stably located at its installation position without displacement, and the leakage problem can also be solved. Or the limiting member can be fixed inside the water pump assembly by welding, bonding or other means as long as the limiting member can be fixed inside the water pump assembly.

[0017] The above-mentioned anti-leakage structure of the oil seal of the water pump assembly can be further set as follows: The material of the limiting member is polytetrafluoroethylene, nylon or metal.

[0018] With the above technical solution, the limiting members processed from the above materials all have good hardness. After being installed in the water pump assembly, the limiting members will not deform. When the limiting members limit the oil seal, the limiting members will not deform, and the sealing performance can reach the best state. Among them, the limiting member made of polytetrafluoroethylene has the best performance, whether it is hardness or wear resistance, which can meet the working requirements of the water pump assembly during actual use, and the production cost is also relatively low.

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0020] Figure 1 Schematic diagram of the assembled state of Embodiment 1 of the present invention Figure 1 ;

[0021] Figure 2 Schematic diagram of the assembled state of Embodiment 1 of the present invention Figure 2 ;

[0022] Figure 3 is a schematic diagram of the structure of the limiting member of Embodiment 1 of the present invention Figure 1 ;

[0023] Figure 4 is a schematic diagram of the structure of the limiting member of Embodiment 1 of the present invention Figure 2 ;

[0024] Figure 5 is a schematic diagram of the structure of the limiting member of Embodiment 4 of the present invention Figure 1 ;

[0025] Figure 6 is a schematic diagram of the structure of the limiting member of Embodiment 4 of the present invention Figure 2 ;

[0026] Figure 7 is a schematic diagram of the structure of the limiting member of Embodiment 5 of the present invention Figure 1 ;

[0027] Figure 8 is a schematic structural view of the limiting member according to the fifth embodiment of the present invention Figure 2 ;

[0028] Figure 9 is a schematic structural view of the limiting member according to the second embodiment of the present invention Figure 1 ;

[0029] Figure 10 is a schematic structural view of the limiting member according to the second embodiment of the present invention Figure 2 ;

[0030] Figure 11 is a schematic structural view of the limiting member according to the third embodiment of the present invention Figure 1 ;

[0031] Figure 12 is a schematic structural view of the limiting member according to the third embodiment of the present invention Figure 2 ;

[0032] Reference numeral annotation: limiting member 1, control valve 2, valve rod sleeve hole 3, sinking groove 4, oil seal 5 Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention

[0034] Embodiment 1: As shown in Figure 1 to 4, the oil seal anti-leakage structure of the water pump assembly includes a limiting member 1. The limiting member 1 is a cone. The small end of the limiting member 1 faces the control valve 2 and contacts the end face of the control valve 2. The large end of the limiting member 1 faces the oil seal 5 and contacts the upper end face of the oil seal 5 to limit the oil seal 5

[0035] The limiting member 1 includes a valve rod sleeve hole 3 provided in the middle and sleeved on the outer periphery of the valve rod of the control valve 2. The upper end face of the limiting member 1 contacts the end face of the control valve 2. On the one hand, the limiting member 1 and the water pump assembly are designed as separate parts, so that the production mold of the water pump assembly does not need to be changed, which is convenient for the processing and production of the water pump assembly. At the same time, it is also convenient for the assembly of the oil seal 5, the limiting member 1, and the control valve 2. On the other hand, a valve rod sleeve hole 3 is provided in the middle of the limiting member 1 to guide and position the limiting member 1. At the same time, when the limiting member 1 shifts left and right, and the axial length of the limiting member 1 is reasonably controlled during processing, the upper end face of the limiting member 1 can contact the control valve 2 and the lower end face can contact the oil seal 5. In this way, when the control valve 2 rotates, even if the oil seal 5 (made of elastic material) deforms, the control valve 2 will not float up and down excessively, and the oil seal 5 will not be driven to move, thereby avoiding leakage at the oil seal 5

[0036] The middle part of the end surface of the stopper 1 facing the oil seal 5 is provided with a recessed groove 4 which is recessed toward the control valve 2. When the upper end surface of the oil seal 5 is provided with a strip-shaped sealing strip or a convex ridge, the sealing strip located in the middle of the oil seal 5 can be inserted into the recessed groove 4. When the oil seal 5 is squeezed and deformed, the sealing strip will be deformed toward the valve stem side under the action of the recessed groove 4, thereby improving the sealing performance and achieving a better sealing effect.

[0037] The material of the stopper 1 is polytetrafluoroethylene, nylon or metal. The stopper 1 processed from the above materials has good hardness. After being installed in the water pump assembly, the stopper 1 will not be deformed. In this way, when the stopper 1 limits the oil seal 5, the stopper 1 will not be deformed, and the sealing performance can reach the best state. Among them, the stopper 1 made of polytetrafluoroethylene has the best performance, whether it is hardness or wear resistance, in actual use, it can meet the working requirements of the water pump assembly, and the production cost is also low.

[0038] A conical limiting member 1 is added between the control valve 2 and the oil seal 5 to limit the oil seal 5. When the control valve 2 is working, the limiting member 1 can resist the oil seal 5, thereby compensating for the gap between the oil seal 5 and the control valve 2. The control valve 2 will not move up and down, and the oil seal 5 will not change position, so no leakage will occur, which solves the problem that the water pump assembly is very prone to leakage at the oil seal 5 in the prior art.

[0039] Embodiment 2: Compared with Embodiment 1, the only difference lies in the appearance of the limiting member 1. The limiting member 1 in Embodiment 2 is cylindrical, as shown in FIGS. 9 and 10 .

[0040] Embodiment 3: Compared with Embodiment 1, the only difference lies in the appearance of the limiting member 1. The limiting member 1 in Embodiment 3 is a square cylinder (or a polygonal cylinder), as shown in FIGS. 11 and 12 .

[0041] Embodiment 4: Compared with Embodiment 1, the only difference lies in the appearance of the stopper 1. The stopper 1 in Embodiment 4 is not only cone-shaped but also has a triangle processed on the outer peripheral surface, as shown in FIGS. 5 and 6 .

[0042] Embodiment 5: Compared with Embodiment 1, the only difference lies in the appearance of the stopper 1. The stopper 1 in Embodiment 5 is not only cone-shaped but also has a pentagonal shape processed on the outer peripheral surface, as shown in FIGS. 7 and 8 .

[0043] Embodiment 6: Compared with Embodiment 1, the difference lies not only in the appearance of the limit member 1, but also in that the limit member 1 is fixed inside the water pump assembly. The limit member 1 in Embodiment 6 is a baffle, and the upper end surface of the baffle may not contact the end surface of the control valve 2.

[0044] One end of the stopper is fixed inside the housing of the water pump assembly, and the other end of the stopper extends to the upper end of the oil seal 5 and contacts the upper end of the oil seal 5 to limit the position of the oil seal 5. The limiting member 1 can be integrally formed with the water pump assembly, that is, by changing the processing mold of the water pump assembly, the housing of the water pump assembly with the limiting member 1 is directly processed. In this way, after the oil seal 5 is installed, it can be stably located at its installation position without displacement, and the leakage problem can also be solved. Or the limiting member 1 can be fixed inside the water pump assembly by means of welding or bonding as long as the limiting member 1 can be fixed inside the water pump assembly.

[0045] In all the above embodiments, a limiting member 1 is added between the control valve 2 and the oil seal 5 to limit the position of the oil seal 5. When the control valve 2 works, the limiting member 1 can resist the oil seal 5, thereby compensating for the gap between the oil seal 5 and the control valve 2. The control valve 2 will not move up and down, and the position of the oil seal 5 will not change, so leakage will not occur, and the problem that the water pump assembly is prone to leakage at the oil seal 5 in the prior art is solved. However, for the anti-leakage structure of the oil seal 5 of the water pump assembly provided in the first to fifth embodiments, the limiting member 1 is a separate design from the water pump assembly. In this way, the production mold of the water pump assembly does not need to be changed, which is convenient for the processing and production of the water pump assembly. At the same time, it is also convenient for the assembly of the oil seal 5, the limiting member 1, and the control valve 2. For the anti-leakage structure of the oil seal 5 of the water pump assembly provided in the sixth embodiment, the limiting member 1 is fixed inside the water pump assembly, and the working stability of the oil seal 5 is better.

Claims

1. Leakage prevention structure of the oil seal of the water pump assembly, characterized in that: It includes a limiting member, the limiting member is distributed between the upper end surface of the oil seal and the lower end surface of the control valve, and the lower end of the limiting member contacts the upper end surface of the oil seal to limit the oil seal. The limiting member includes a valve stem sleeve hole formed in the middle and sleeved on the outer periphery of the valve stem of the control valve. The upper end surface of the limiting member contacts the end surface of the control valve, and a sinking groove recessed towards the control valve is formed in the middle of the end surface of the limiting member facing the oil seal.

2. The oil seal anti-leakage structure of the water pump assembly according to claim 1, wherein: The limiting member is in the shape of a cylinder or a polygonal column or a cone. When the limiting member is a cone, the small end of the limiting member faces the control valve and the large end faces the oil seal.

3. The oil seal anti-leakage structure of the water pump assembly according to claim 2, wherein: When the limiting member is a cone, the cross-section of the limiting member along the direction perpendicular to the central axis of the valve stem sleeve hole is circular or polygonal.

4. The oil seal anti-leakage structure of the water pump assembly according to claim 1, characterized in that: The limiting member is a stop block, one end of the stop block is fixed in the water pump assembly housing, and the other end of the stop block extends to the upper end of the oil seal and contacts the upper end of the oil seal to limit the oil seal.

5. The oil seal anti-leakage structure of the water pump assembly according to claim 1 or 4, characterized in that: The material of the limiting member is polytetrafluoroethylene or nylon or metal.

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