Bypass valve with spring self-locking structure

Abstract

The utility model discloses a bypass valve with a spring self-locking structure. The bypass valve comprises a hollow valve seat, a valve core and a spring, an oil passing cavity is formed in the valve seat, the two axial ends of the oil passing cavity of the valve seat are open, a bearing platform is arranged at the oil outlet end of the valve seat, a valve element is arranged in the bearing platform in a penetrating mode from the oil outlet end to the oil inlet end, and a sealing plate is arranged at the oil outlet end of the valve element in a radial extending mode and used for being in sealing fit with the bottom end of the valve seat. The oil inlet end of the valve element is provided with a stress groove used for hooking the oil inlet end of the spring, the valve element is sleeved with the spring, the oil outlet end of the spring is tightly pressed on the bearing platform, and the oil inlet end of the spring is hooked into the stress groove. The engine oil filter bypass valve is only provided with three independent parts, namely the valve seat, the valve element and the spring, a valve block is omitted, an oil inlet cavity and an oil outlet cavity are combined into a whole, and the axial length of the engine oil filter bypass valve is remarkably shortened. The number of parts is reduced, the axial length is shortened, the cost of the bypass valve is reduced, the weight of the bypass valve is reduced, the assembling efficiency of the bypass valve is improved, and the aim of industrial integration and lightweight development is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive filters, and particularly to a bypass valve for a filter. Background Art

[0002] According to research, for every 10% reduction in vehicle weight, fuel savings of 5% - 10% can be achieved. Lightweighting can also improve the vehicle's power performance and handling. Integration contributes to lightweighting, makes components more compact, and optimizes the vehicle's space layout. Integration and lightweighting have better environmental performance, simplify the manufacturing process, improve production efficiency, and reduce production costs. Therefore, with the development of the automotive industry and the improvement of emission standards, integration and lightweighting have become the guiding goals of technological development.

[0003] During the operation of the engine of a fuel-powered motor vehicle, impurities such as metal particles shed due to wear will be generated in the engine oil due to high temperature, friction, oxidation, etc. Without an oil filter, these impurities will, at best, reduce the lubrication effect, and at worst, exacerbate wear and even cause engine failure. Therefore, an oil filter is an essential component in a fuel-powered motor vehicle.

[0004] The bypass valve is an important component in the oil filter. The filter element may become blocked during long-term use. If the lubricating oil (engine oil) cannot continue to flow in the lubricating oil circuit system after blockage, the engine moving pairs will experience dry friction due to lack of lubricating oil, resulting in serious wear of engine components, engine overheating, increased risk of bearing shell burning and cylinder scoring, increased noise, and reduced engine life.

[0005] Therefore, a bypass valve is usually provided in the oil filter to allow the engine oil to flow through without filtration when the filter element is blocked. Although unfiltered engine oil may also cause problems such as increased wear, it is much less harmful than engine dry friction.

[0006] The existing bypass valve for an oil filter is as Figure 1 shown, including a valve seat 1. A circular baffle 2 is provided in the middle of the valve seat 1. The circular hole surrounded by the circular baffle 2 serves as a guide hole 3. The valve seat 1 above the circular baffle 2 encloses an oil inlet chamber 4. The valve seat 1 below the circular baffle 2 encloses an oil outlet chamber 5. A valve core 6 is provided in the oil outlet chamber 5. An oil outlet hole 7 is provided in the valve core 6. The axial inner end of the oil outlet hole 7 communicates with the oil outlet chamber 5. The axial outer end of the oil outlet hole 7 is used to connect to the downstream oil circuit in the motor vehicle. The guide hole 3 connects the oil inlet chamber 4 and the oil outlet chamber 5.

[0007] A step 8 extends radially outward from the outer axial end of the valve core 6. A spring 9 is wound around the valve core 6. The outer axial end of the spring 9 contacts the step 8, and the inner axial end of the spring 9 is connected to a valve disc 10 for blocking the guiding hole 3. When the filter element is working normally and not blocked, the valve disc 10 closes the guiding hole 3 under the action of the spring force. When the filter element is blocked, the pressure at the oil inlet cavity rises, compressing the spring to contract, causing the valve disc 10 to leave the guiding hole 3, so that the upstream engine oil flows downstream through the oil outlet cavity 5 and the oil outlet hole 7, avoiding dry grinding of the engine.

[0008] The above-mentioned existing oil filter includes four independent parts: a valve seat 1, a spring 9, a valve core 6, and a valve disc 10. The number of parts is relatively large, and the arrangement of the two cavities, namely the oil outlet cavity 5 and the oil inlet cavity 4, also increases the axial length of the bypass valve.

[0009] The design concept of the present utility model is to aim at integration and lightweight, design a new bypass valve structure, reduce the number of independent parts of the bypass valve, shorten the axial length of the bypass valve, reduce the material used, and lower the cost of the bypass valve. Summary of the Utility Model

[0010] The purpose of the present utility model is to provide a bypass valve with a spring self-locking structure, which can be made into a bypass valve for an oil filter with only three parts, and the oil inlet cavity and the oil outlet cavity are combined into one, reducing the number of parts and improving the degree of integration and lightweight.

[0011] To achieve the above purpose, the present utility model provides a bypass valve with a spring self-locking structure, which includes a hollow valve seat, a valve core, and a spring; there is an oil passage cavity inside the valve seat, and both axial ends of the oil passage cavity of the valve seat are open. The two axial ends of the valve seat are respectively an oil inlet end and an oil outlet end; a bearing platform is provided at the oil outlet end of the valve seat, and a valve core is inserted through the bearing platform from the oil outlet end to the oil inlet end. A sealing plate extends radially from the oil outlet end of the valve core for sealing cooperation with the bottom end of the valve seat.

[0012] A stress groove for hooking the oil inlet end of the spring is provided at the oil inlet end of the valve core. A spring is sleeved on the valve core. The oil outlet end of the spring is tightly pressed on the bearing platform, and the oil inlet end of the spring is hooked into the stress groove.

[0013] The valve core is hollow.

[0014] The present utility model has the following advantages:

[0015] A bypass valve with a spring self-locking structure of the present utility model has only three independent parts, namely a valve seat, a valve core, and a spring. Compared with the prior art, not only the valve disc is cancelled, but also the oil inlet cavity and the oil outlet cavity are combined into one, significantly shortening the axial length of the oil filter bypass valve. Reducing the number of parts and shortening the axial length both reduce the cost of the bypass valve and also reduce the weight of the bypass valve. Reducing the number of parts also improves the assembly efficiency of the bypass valve, contributing to the goals of industry integration and lightweight development. It is beneficial for the oil filter to reduce the cost and fuel consumption of motor vehicles.

[0016] The valve core provided with a hollow interior can save materials and reduce costs. Description of the Drawings

[0017] Figure 1 is a schematic cross-sectional structure diagram of a prior art bypass valve for an oil filter.

[0018] Figure 2 is a schematic cross-sectional structure diagram of the present utility model.

[0019] Figure 3 is a schematic structure diagram of the valve core in the present utility model.

[0020] Figure 4 is a schematic structure diagram of the spring in the present utility model. Detailed Embodiment

[0021] As Figures 2 to 4 shown, the present utility model provides a bypass valve with a spring self-locking structure, including a hollow valve seat 11, a valve core 12, and a spring 13; a through-oil cavity 14 is provided inside the valve seat 11, and both axial ends of the through-oil cavity 14 of the valve seat 11 are open. The two axial ends of the valve seat 11 are respectively an oil inlet end and an oil outlet end; a bearing platform 15 is provided at the oil outlet end of the valve seat 11, and the valve core 12 is inserted through the bearing platform 15 from the oil outlet end towards the oil inlet end. A sealing plate 16 is radially extended at the oil outlet end of the valve core 12, and the sealing plate 16 is used for sealing cooperation with the bottom end of the valve seat 11;

[0022] A stress groove 17 for hooking the oil inlet end of the spring 13 is opened at the oil inlet end of the valve core 12. The spring 13 is sleeved on the valve core 12. The oil outlet end of the spring 13 is tightly pressed on the bearing platform 15, and the oil inlet end of the spring 13 is hooked into the stress groove 17.

[0023] A bypass valve with a spring 13 self-locking structure of the present utility model has only three independent parts, namely a valve seat 11, a valve core 12 and a spring 13. Compared with the prior art, not only the valve disc is cancelled, but also the oil inlet cavity and the oil outlet cavity are combined into one, significantly shortening the axial length of the oil filter bypass valve. Reducing the number of parts and shortening the axial length both reduce the cost of the bypass valve, and both reduce the weight of the bypass valve. Reducing the number of parts also improves the assembly efficiency of the bypass valve, contributing to the goals of industry integration and lightweight development. Being used in the oil filter is beneficial to reducing the cost and fuel consumption of motor vehicles.

[0024] The valve core 12 is provided with a hollow interior. The valve core 12 with a hollow interior can save materials and reduce costs.

[0025] During use, the present utility model is installed on the oil filter of a motor vehicle. The oil inlet end of the valve seat 11 communicates with the upstream oil circuit of the oil filter, and the oil outlet end of the valve seat 11 (i.e., Figure 2 the lower end of the valve seat 11 in the figure) communicates with the clean oil part of the oil filter.

[0026] When the filter element of the oil filter is working normally, the pressure difference at both ends of the valve seat 11 is relatively low, less than the elastic force of the spring 13. Therefore, under the action of the elastic force of the spring 13, the spring 13 presses the valve core 12 upward through the force receiving groove 17 towards Figure 2 the upper part of the drawing in the figure, so that the sealing plate 16 of the valve core 12 tightly presses against the lower end of the valve seat 11 upward from Figure 2 the lower part of the drawing in the figure, thereby closing the bypass valve, and the oil (lubricating oil) maintains a normal filtration path and does not bypass through the bypass valve.

[0027] When the filter element of the oil filter becomes blocked, the pressure difference at both ends of the valve seat 11 increases, greater than the elastic force of the spring 13. The oil pressure acts on the sealing plate 16 downward from Figure 2 the upper part in the figure, forcing the sealing plate 16 and the valve core 12 to move downward away from the lower end of the valve seat 11. During this process, the spring 13 is compressed. After the sealing plate 16 moves downward away from the lower end of the valve seat 11, the bypass valve opens, and the oil passes downward through the oil passage cavity 14 of the valve seat 11 and then enters the clean oil part of the oil filter (equivalent to short-circuiting the filter element), so as to maintain the oil circulation even when the filter element is blocked and avoid dry grinding of the engine.

[0028] The above embodiments are only used to illustrate rather than limit the technical solutions of the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: still can modify or equivalently replace the present utility model, and any modification or partial replacement without departing from the spirit and scope of the present utility model shall be covered by the scope of the claims of the present utility model.

Claims

1. A spring self-locking structure bypass valve, comprising a hollow valve seat, a valve core and a spring; characterized in that: The valve seat is provided with an oil passage cavity, and the two axial ends of the valve seat oil passage cavity are open, and the two axial ends of the valve seat are respectively an oil inlet end and an oil outlet end; a support is provided at the oil outlet end of the valve seat, and a valve core is passed through the support from the oil outlet end to the oil inlet end. A sealing plate is radially extended from the oil outlet end of the valve core, and the sealing plate is used to seal with the bottom end of the valve seat; The oil inlet end of the valve core is provided with a stress groove for hooking the oil inlet end of the spring. The valve core is sleeved with a spring, the oil outlet end of the spring is tightly pressed on the bearing platform, and the oil inlet end of the spring is hooked into the stress groove.

2. A spring self-locking structure bypass valve according to claim 1, characterized in that: The valve core is hollow.

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