阅读说明：本技术 一种滑油调压阀阀头结构 (Valve head structure of lubricating oil pressure regulating valve ) 是由 宁涛 幕传琳 曹立冬 翟振强 肖强 张颖 苍学伟 黄林 于 2020-03-25 设计创作，主要内容包括：本发明公开了一种滑油调压阀阀头结构,包括阀头、阀体、弹簧、溢流孔,阀头设在阀体内部,阀头的轴向端部与阀体的滑油泵出口接触,弹簧设在阀头内腔提供预压紧力,用于保持阀头的轴向端部与阀体的滑油泵出口连接防止一定压力以下的滑油推动阀头的轴向端部,阀体的径向一端设有溢流孔,当滑油压力大于弹簧提供的预压紧力时,弹簧压缩,阀头移动并释放滑油流向溢流孔；阀头径向与阀体配合的间隙处设有容屑槽。本发明的阀头在阀体中滑动时,如果配合面处的滑油中存在金属小颗粒,金属小颗粒更加容易进入间隙较大的沟槽中,可以大大降低其卡在阀头与阀体的配合间隙中的概率,降低调压阀发生卡滞故障的概率,提高滑油泵调压阀的工作可靠性。(The invention discloses a valve head structure of a lubricating oil pressure regulating valve, which comprises a valve head, a valve body, a spring and an overflow hole, wherein the valve head is arranged in the valve body, the axial end part of the valve head is contacted with an outlet of a lubricating oil pump of the valve body, the spring is arranged in an inner cavity of the valve head to provide a pre-pressing force and is used for keeping the connection between the axial end part of the valve head and the outlet of the lubricating oil pump of the valve body to prevent lubricating oil below a certain pressure from pushing the axial end part of the valve head, the overflow hole is arranged at one radial end of the valve body, when the pressure of the lubricating oil is greater than; the clearance between the radial direction of the valve head and the valve body is provided with a chip groove. When the valve head slides in the valve body, if small metal particles exist in the lubricating oil at the matching surface, the small metal particles can more easily enter the groove with larger clearance, so that the probability of the small metal particles being clamped in the matching clearance between the valve head and the valve body can be greatly reduced, the probability of clamping stagnation failure of the pressure regulating valve is reduced, and the working reliability of the pressure regulating valve of the lubricating oil pump is improved.)

1. A valve head structure of a lubricating oil pressure regulating valve is characterized by comprising a valve head (2), a valve body (3), a spring (1) and an overflow hole (4), wherein the valve head (2) is arranged inside the valve body (3), the axial end part of the valve head (2) is contacted with an outlet of a lubricating oil pump of the valve body (3), the spring (1) is arranged in an inner cavity of the valve head (2) to provide a pre-pressing force for keeping the axial end part of the valve head (2) connected with an outlet of the lubricating oil pump of the valve body (3) to prevent lubricating oil under certain pressure from pushing the axial end part of the valve head (2), the overflow hole (4) is arranged at one radial end of the valve body (3), when the lubricating oil pressure is greater than the pre-pressing force provided by the spring (1), the spring is compressed, and the valve; a chip groove (5) is arranged at the clearance where the valve head (2) is radially matched with the valve body (3).

2. The valve head structure of the oil pressure regulating valve according to claim 1, wherein the valve head (2) is surface-polished at the gap radially matching with the valve body (3).

3. The valve head structure of the lubricating oil pressure regulating valve according to claim 1, wherein a rubber gasket is glued on the contact surface of the axial end part of the valve head (2) and the outlet of the lubricating oil pump of the valve body (3).

4. The valve head structure of the lubricating oil pressure regulating valve according to claim 1, wherein the axial end part of the valve head (2) adopts a conical surface and is in line contact with the valve body (3).

5. The valve head structure of the lubricating oil pressure regulating valve according to claim 4, wherein the chip grooves (5) are plural, and the plural chip grooves (5) are arranged on the radial outer surface of the valve head (2).

6. The valve head structure of the lubricating oil pressure regulating valve according to claim 1, characterized in that the axial end of the valve head (2) adopts a ball head surface.

7. A valve head structure of a lubricating oil pressure regulating valve according to claim 6, characterized in that the chip groove (5) is a cavity whose length exceeds half of the axial length of the valve head (2).

8. The valve head structure of the lubricating oil pressure regulating valve according to claim 1, wherein the bottom of the chip groove is provided with a through hole which is communicated with the inner cavity of the valve head (2).

Technical Field

The invention belongs to the technical field of mechanical structures, relates to a lubricating oil structure, and particularly relates to a valve head structure of a lubricating oil pressure regulating valve.

Background

The lubricating oil pump is a core component of a mechanical lubricating system, and has the function of enabling lubricating oil to continuously circulate in the lubricating system so as to lubricate and cool parts such as gears, bearings and the like in a mechanical transmission system. In order to ensure that the pressure of the lubricating oil output by the lubricating oil pump is kept stable, a pressure regulating valve is often arranged at the outlet of the lubricating oil pump, and when the pressure of the outlet of the lubricating oil pump exceeds a limit value, the pressure regulating valve is opened and overflows to achieve the purpose of pressure relief, so that the safety of a lubricating system is ensured. When the pressure drops, the valve closes itself and prevents flooding. The structure of a common aviation lubricating oil pump pressure regulating valve is shown in figure 1, wherein 1 is a spring, 2 is a valve head, 3 is a valve body, and 4 is a lubricating oil overflow hole on the valve body 3. When the outlet pressure of the lubricating oil pump is smaller than the set pressure, the outlet hydraulic pressure of the lubricating oil pump on the right side of the valve head 2 is smaller than the pre-compression force provided by the left spring 1, the valve head 2 is in conical contact with the valve body 3, so that the overflow channel is closed, and all the lubricating oil cannot flow back to the inlet of the lubricating oil pump through the overflow hole 4 on the valve body 3; when the outlet pressure of the lubricating oil pump is greater than the set pressure, the hydraulic pressure at the outlet of the lubricating oil pump on the right side of the valve head 2 is greater than the pre-compression force provided by the spring 1 on the left side, the valve head 2 moves leftwards, the valve head 2 and the valve body 3 are separated by contacting with a conical surface to form an overflow channel, and redundant lubricating oil flows back to the inlet of the lubricating oil pump through an overflow hole 4 on the valve body 3, so that the outlet pressure of the lubricating oil pump is reduced.

The main problem existing in the traditional structure of the pressure regulating valve of the aviation lubricating oil pump is that when the lubricating oil contains small metal particles, the small metal particles easily enter a fit clearance between the valve head 2 and the valve body 3, so that clamping stagnation faults occur. The flexibility and the reliability of the work of the pressure regulating valve are reduced, and the problem of pressure fluctuation of a lubricating system is easily caused.

Disclosure of Invention

In order to solve the problems, the invention provides a valve head structure of a lubricating oil pressure regulating valve, which reduces the probability of clamping failure of the pressure regulating valve.

The technical scheme of the invention is as follows: a valve head structure of a lubricating oil pressure regulating valve comprises a valve head, a valve body, a spring and an overflow hole, wherein the valve head is arranged inside the valve body, the axial end part of the valve head is contacted with an outlet of a lubricating oil pump of the valve body, the spring is arranged in an inner cavity of the valve head to provide a pre-pressing force and is used for keeping the axial end part of the valve head connected with the outlet of the lubricating oil pump of the valve body to prevent lubricating oil below a certain pressure from pushing the axial end part of the valve head, the overflow hole is arranged at one radial end of the valve body, when the pressure of the lubricating oil is greater than the pre-; the clearance between the radial direction of the valve head and the valve body is provided with a chip groove.

Further, the contact clearance surface between the valve head and the valve body is polished.

Furthermore, a rubber gasket is glued on the contact surface of the axial end part of the valve head and the outlet of the lubricating oil pump of the valve body.

Furthermore, the axial end part of the valve head adopts a conical surface and is in line contact with the valve body. Thereby ensuring its hermetic seal.

Further, a plurality of chip flutes are arranged on the radially outer surface of the valve head.

Or the axial end part of the valve head adopts a ball head surface. The advantage is that the sealing can be completed by automatic alignment when the radial positioning is not accurate.

Further, the chip groove is a cavity with a length exceeding half of the axial length of the valve head.

Furthermore, the bottom of the chip pocket is provided with a through hole which is communicated with the inner cavity of the valve head. Impurities in the chip groove 5 can be flushed into the inner cavity of the valve head through lubricating oil and discharged through an oil discharge port of the inner cavity of the valve head.

The invention has the advantages that:

when the valve head slides in the valve body, if there are metal small particles in the lubricating oil of fitting surface department, metal small particles gets into the great slot in clearance more easily, can its card probability in the fitting clearance of valve head and valve body of greatly reduced, reduces the probability that the clamping stagnation trouble takes place for the air-vent valve, improves the operational reliability of lubricating oil pump air-vent valve.

Drawings

FIG. 1 is a schematic structural diagram of the background art of the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

1-spring, 2-valve head, 3-valve body, 4-overflow hole, 5-chip groove.

Detailed Description

The contents of this section are examples of the present invention, and are used to explain and explain the technical solutions of the present invention.

A valve head structure of a lubricating oil pressure regulating valve comprises a valve head 2, a valve body 3, a spring 1 and an overflow hole 4, wherein the valve head 2 is arranged inside the valve body 3, the axial end part of the valve head 2 is contacted with a lubricating oil pump outlet of the valve body 3, the spring 1 is arranged in an inner cavity of the valve head 2 to provide a pre-pressing force and is used for keeping the axial end part of the valve head 2 and the lubricating oil pump outlet of the valve body 3 connected to prevent lubricating oil under certain pressure from pushing the axial end part of the valve head 2, the overflow hole 4 is arranged at one radial end of the valve body 3, when the lubricating oil pressure is greater than the pre-pressing force provided by the spring 1, the spring is; a chip groove 5 is arranged at the clearance where the valve head 2 is matched with the valve body 3 in the radial direction.

Wherein, the contact clearance surface between the valve head 2 and the valve body 3 is polished, and a rubber gasket is glued on the contact surface of the axial end part of the valve head 2 and the outlet of the lubricating oil pump of the valve body 3.

The axial end part of the valve head 2 adopts a conical surface and is in line contact with the valve body 3. Thereby ensuring its hermetic seal. In this case, the plurality of chip flutes 5 are arranged on the radially outer surface of the valve head 2.

Alternatively, the axial end of the valve head 2 is a ball head surface. The advantage is that the sealing can be completed by automatic alignment 3 even if the radial positioning is not accurate. By such design, the chip groove 5 can be a cavity with the length exceeding half of the axial length of the valve head 2, and the cavity can be regarded as a large integral chip groove 5 formed by punching through a plurality of chip grooves 5, so that the capacity of the chip groove 5 for containing metal chips can be increased.

In addition, the bottom of the chip groove is provided with a through hole which is communicated with the inner cavity of the valve head 2. Impurities in the chip flutes 5 can be flushed into the inner cavity of the valve head 2 through lubricating oil and discharged through an oil discharge port of the inner cavity of the valve head 2.

Another embodiment of the present invention is explained below with reference to the drawings.

The structure of the improved pressure regulating valve of the lubricating oil pump is shown in fig. 2, when the outlet pressure of the lubricating oil pump is smaller than the set pressure, the outlet hydraulic pressure of the lubricating oil pump on the right side of the valve head 2 is smaller than the pre-compression force provided by the left spring 1, the valve head 2 is in conical contact with the valve body 3, so that an overflow channel is closed, and all the lubricating oil cannot flow back to the inlet of the lubricating oil pump through the overflow hole 4 on the valve body 3; when the outlet pressure of the lubricating oil pump is greater than the set pressure, the hydraulic pressure at the outlet of the lubricating oil pump on the right side of the valve head 2 is greater than the pre-compression force provided by the spring 1 on the left side, the valve head 2 moves leftwards, the valve head 2 and the valve body 3 are separated by contacting with a conical surface to form an overflow channel, and redundant lubricating oil flows back to the inlet of the lubricating oil pump through an overflow hole 4 on the valve body 3, so that the outlet pressure of the lubricating oil pump is reduced.

When the valve head 2 slides in the valve body 3, if there are metal particles in the lubricating oil of fitting surface department, the metal particles get into the relatively great slot 5 in clearance more easily, can greatly reduced its card probability in the fitting clearance of valve head 2 and valve body 3, reduce the probability that the clamping stagnation trouble takes place for the air-vent valve, improve the operational reliability of lubricating oil pump air-vent valve.