High-safety vane pump

Abstract

The high-safety vane pump comprises a vane pump body and a safety valve assembly in threaded connection with the interior of the vane pump body, the safety valve assembly comprises a valve seat, a valve body, a cone valve and an oil outlet connector, and the right side end of the valve seat is in threaded connection with the inner wall of the left side of the valve body; the cone valve is arranged in the valve body, the left side end of the cone valve abuts against the valve seat, a pressure limiting spring is further connected in the valve body and on the outer circumference of the cone valve in a sleeved mode, and at least one filter screen is distributed on the side face of the outer circumference of the valve seat. The anti-blocking device has the advantages that the structure is simple, surface impurity deposition is reduced, and the anti-blocking effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of vane pumps, and particularly relates to a vane pump with high safety. Background Art

[0002] With the economic development and the improvement of safety awareness, and at the same time, the requirements for automotive safety are becoming increasingly strict, and the requirements for the safety of the vane pump assembly are also higher. For example, the patent application No. CN201010265035.X discloses an automotive hydraulic power steering vane pump, which solves the problems of oil pump leakage and failure, oil pollution, and host installation interference, and has good heat dissipation effect, reducing the serious heating phenomenon of the steering pump assembly. However, at present, the safety valve of the vane pump on the market uses a filter screen to filter impurities. As Figure 1 shown, it is the existing filter screen structure. The small holes of the safety valve are usually about 1 mm, which are easily blocked by impurities. Therefore, a filter screen is usually installed on the outer layer. The high-pressure oil enters from the outside of the filter screen 1. However, because the filter screen surface of the conventional product is perpendicular to the flow direction of the high-pressure oil, impurities are easily deposited on the filter screen. As the impurities continue to accumulate, the entire filter screen surface may eventually be completely blocked, thus affecting the opening of the safety valve. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a vane pump with high safety, which has a simple structure, reduces the deposition of surface impurities, and has a better anti-blocking effect.

[0004] To solve the above problems, the utility model adopts the following technical solutions:

[0005] A vane pump with high safety includes a vane pump main body and a safety valve assembly threadedly connected inside the vane pump main body. The safety valve assembly includes a valve seat, a valve body, a cone valve, and an oil outlet joint. The right end of the valve seat is threadedly connected to the left inner wall of the valve body. The cone valve is built in the valve body and its left end abuts against the valve seat. A pressure-limiting spring is also sleeved on the outer circumference of the cone valve inside the valve body. At least one or more filter screens are distributed on the outer circumferential side surface of the valve seat.

[0006] A further technical solution is that filter screens are respectively distributed on the front and rear opposite side surfaces of the outer circumference of the valve seat. The filter screens are arranged on the front and rear sides, which can make the high-pressure oil enter the valve seat more smoothly and quickly.

[0007] A further technical solution is that an inner groove is also distributed on the outer circumferential side surface of the valve seat, and the filter screens are distributed inside the inner groove on the outer circumference of the valve seat, which can improve the speed and flow rate of the high-pressure oil entering the valve seat and improve the efficiency.

[0008] A further technical solution is that the right end of the valve body is movably connected to the oil outlet joint in the left-right direction for connecting external components, which belongs to a conventional component. The safety valve assembly is threadedly connected to the inner hole of the vane pump through the oil outlet joint.

[0009] The beneficial effects of the present utility model are as follows: The present utility model is a vane pump with high safety. From the perspective of safety, the filter screen structure of the safety valve of the vane pump is optimized and improved. The filter screen direction of the safety valve assembly is designed to be consistent with the flow direction of the high-pressure oil, which not only avoids the disadvantage that impurities are easily deposited on the surface of the filter screen of the safety valve of the conventional vane pump, but also can play a role in dredging the surface of the filter screen under the action of high-pressure oil. Brief Description of the Drawings

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for work in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0011] Figure 1 is a perspective view of the prior art;

[0012] Figure 2 is a cross-sectional view of the prior art;

[0013] Figure 3 is a perspective view of a vane pump with high safety of the present utility model;

[0014] Figure 4 is a schematic diagram of the installation of the safety valve assembly in the vane pump body of a vane pump with high safety of the present utility model;

[0015] Figure 5 is a cross-sectional view of the safety valve assembly in a vane pump with high safety of the present utility model;

[0016] Figure 6 is a perspective view of the safety valve assembly in a vane pump with high safety of the present utility model;

[0017] Figure 7 is a front view of the safety valve assembly in a vane pump with high safety of the present utility model;

[0018] Figure 8 [[ID=�8]]is a rear view of the safety valve assembly in a vane pump with high safety of the present utility model.

[0019] Figure 1-8 In the figure: 1 - vane pump body, 2 - safety valve assembly, 3 - inner hole of the vane pump, 21 - valve seat, 22 - valve body, 23 - conical valve, 24 - pressure limiting spring, 25 - filter screen, 26 - oil outlet joint. Detailed Embodiments

[0020] The preferred embodiments of the present utility model will be described in detail below, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model.

[0021] Referring to Figures 3 to 8 As shown, a highly safe vane pump includes a vane pump main body 1 and a safety valve assembly 2 threadedly connected inside the vane pump main body 1. The safety valve assembly 2 includes a valve seat 21, a valve body 22, a poppet valve 23 and an oil outlet joint 26. The right end of the valve seat 21 is threadedly connected to the left inner wall of the valve body 22. The poppet valve 23 is disposed inside the valve body 22 and its left end abuts against the valve seat 21. A pressure-limiting spring 24 is also sleeved on the outer circumference of the poppet valve 23 inside the valve body 22. At least one or more filter meshes 25 are distributed on the outer circumferential side surface of the valve seat 21.

[0022] Filter meshes 25 are distributed on the front and rear opposite side surfaces of the outer circumference of the valve seat 21. The arrangement of filter meshes 25 on the front and rear sides can make the high-pressure oil enter the valve seat 21 more smoothly and quickly. An inner groove 26 is also distributed on the outer circumferential side surface of the valve seat 21, and the filter meshes 25 are distributed inside the inner groove 26 on the outer circumference of the valve seat 21, which can improve the speed and flow rate of the high-pressure oil entering the valve seat 21 and enhance the efficiency. The right end of the valve body 22 is movably connected to the oil outlet joint 26 in the left-right direction for connecting external components, which is a conventional component. The safety valve assembly 2 is threadedly connected to the inner hole 3 of the vane pump through the oil outlet joint 26.

[0023] In this embodiment, the filter meshes 25 are distributed on the outer circumferential side surface of the valve seat 21, which is consistent with the direction of the high-pressure oil entering the valve seat 21 and the valve body 22 through the filter meshes 25. This not only avoids the disadvantage that impurities are easily deposited on the surface of the filter mesh of the safety valve of a conventional vane pump, but also can play a role in dredging the surface of the filter mesh under the action of high-pressure oil, improving the use safety of the vane pump.

[0024] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any change or replacement that can be thought of without creative work should be covered within the protection scope of the present utility model.

Claims

1. A vane pump with high security, characterized in that: It includes a vane pump main body and a safety valve assembly threadedly connected inside the vane pump main body. The safety valve assembly includes a valve seat, a valve body, a conical valve, and an oil outlet joint. The right end of the valve seat is threadedly connected to the left inner wall of the valve body. The conical valve is built inside the valve body and its left end abuts against the valve seat. A pressure-limiting spring is also sleeved on the outer circumference of the conical valve inside the valve body. At least one or more filter meshes are distributed on the outer circumferential side surface of the valve seat.

2. The high-security vane pump according to claim 1, characterized in that: Filter meshes are distributed on the front and rear opposite side surfaces of the outer circumference of the valve seat respectively.

3. A highly secure vane pump according to claim 1, characterized in that: An inner groove is also distributed on the outer circumferential side surface of the valve seat, and the filter meshes are distributed inside the inner groove on the outer circumference of the valve seat.

4. A highly secure vane pump according to claim 1, characterized in that: The right end of the valve body is connected to the oil outlet joint in a left-right movable manner.

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