CN110966418A

CN110966418A - Spring seat for hydraulic valve parts

Info

Publication number: CN110966418A
Application number: CN201911149171.XA
Authority: CN
Inventors: 杨亚威; 李进; 唐斐; 王小亮; 晁文雄; 马跃溪
Original assignee: AECC Aero Engine Xian Power Control Technology Co Ltd
Current assignee: AECC Aero Engine Xian Power Control Technology Co Ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-04-07

Abstract

The invention relates to the technical field of hydraulic valves, in particular to a spring seat for hydraulic valve parts. The hydraulic valve comprises a valve core, a spring seat and a structural body, wherein the spring is arranged on the spring seat, provides elastic force for the valve core, and is provided with a cavity for installing the valve core, the spring and the spring seat; the spring seat is characterized in that the two ends of the spring seat are respectively provided with a spring mounting surface and a bottom surface, a spiral groove is formed in the bottom surface, the spring seat is immersed in a flowing liquid medium, and the surface areas of the two sides of the spiral groove are different, so that hydraulic pressure acting on the areas of the two sides is different, and the spring seat has a rotating movement trend. The rotary motion of spring holder can make case and disk seat cooperation more accurate to can change the contact form between spring holder and the cavity, make opening and closing of valve more rapid.

Description

Spring seat for hydraulic valve parts

Technical Field

The invention relates to the technical field of hydraulic valves, in particular to a spring seat for hydraulic valve parts.

Background

The direct-acting overflow valve generally adopts a cone valve core, and the cone valve core is only provided with one cone surface; the end face of the spring seat is not provided with a groove, and the spring seat is inevitably inclined in the working process due to machining errors. The direct-acting overflow valve with the structure generally has vibration and noise phenomena in the working process, and the vibration has certain influence on the product, a system pipeline, the use environment and the like. Excessive vibration easily makes the product deviate from the performance state point, and wearing and tearing aggravation, pipeline connection position are not hard up, can produce harsh noise moreover.

Disclosure of Invention

In order to solve the technical problem, the invention provides a spring seat for a hydraulic valve component.

In order to achieve the purpose of the invention, the technical scheme is as follows: a spring seat for hydraulic valve parts comprises a valve core, a spring seat and a structural body, wherein the spring is arranged on the spring seat and provides elasticity for the valve core;

the spring seat is characterized in that the two ends of the spring seat are respectively provided with a spring mounting surface and a bottom surface, a spiral groove is formed in the bottom surface, the spring seat is immersed in a flowing liquid medium, and the surface areas of the two sides of the spiral groove are different, so that hydraulic pressure acting on the areas of the two sides is different, and the spring seat has a rotating movement trend. The rotary motion of spring holder can make case and disk seat cooperation more accurate to can change the contact form between spring holder and the cavity, make opening and closing of valve more rapid. When the valve port is opened and closed, due to the deflection of the valve port, the excessive pressure overshoot and unstable pressure caused by the irregular overflowing area at the valve port are reduced, and the possibility of high-frequency vibration and noise generation of the valve core is further reduced. In addition, the spiral groove is formed in one step, machining is simple, structure edges are few, and manufacturability is better.

Preferably, the spiral groove extends smoothly from the center of the bottom surface until being inscribed with the edge of the bottom surface, the inscribed position is an opening, and the liquid medium can enter and exit from the opening. The length of the spiral groove is about 3 times of the maximum diameter of the spring seat, and the number of spiral turns is about two. The technical scheme ensures the uniformity of the stress on the bottom surface and simultaneously ensures the length of the spiral groove to the maximum extent.

Preferably, the width and the depth of the spiral groove are consistent in the length direction of the spiral groove, the width is determined according to design parameters, and the depth is about 0.5 times of the width. According to the technical scheme, the uniformity of stress on the bottom surface is ensured.

Preferably, the cross section of the spiral groove is arc-shaped. This technical scheme, the machine-shaping of being convenient for on the one hand, on the other hand can guarantee bottom surface force stability.

Preferably, the spring seat is in clearance fit with the cavity. The clearance should not be too big or undersize, should guarantee that the spring holder moves in the cavity in a flexible way and be difficult for too big skew. The technical scheme ensures the smoothness of the movement of the hydraulic valve.

Preferably, the hydraulic valve is a direct-acting overflow valve. The valve body is easy to vibrate, make noise and the like, and the technical scheme is particularly suitable for solving the technical problems of the valve body.

Preferably, the inlet pressure of the overflow valve is more than 26MPa, the flow is less than 10L/min, and the valve core is conical. The technical scheme highlights that the overflow valve which is most suitable for the working environment belongs to small flow and high pressure.

Preferably, the hydraulic valve is a fixed-differential pressure-reducing valve. The valve core is of a slide valve structure. The valve body is easy to vibrate, make noise and the like, and the technical scheme is particularly suitable for solving the technical problems of the valve body.

Drawings

FIG. 1 is a schematic view of a spring seat according to an embodiment;

FIG. 2 is a schematic view of the bottom structure of the spring seat according to the first embodiment;

FIG. 3 is an enlarged cross-sectional view of the helical groove;

FIG. 4 is a schematic view of the spring seat of the second embodiment;

FIG. 5 is a schematic view of the bottom structure of the spring seat according to the second embodiment.

The symbols in the figures are as follows: 1 spring seat 2 spring mounting face 3 gap 4 cavity wall face 5 cavity 6 forcing member 7 spring seat bottom 8 spiral groove inner wall face 9 spiral groove outer wall face 10 spiral groove 11 slide valve core.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

A spring seat for hydraulic valve parts comprises a valve core, a spring seat and a structural body, wherein the spring is arranged on the spring seat and provides elasticity for the valve core; the two ends of the spring seat are respectively a spring mounting surface and a bottom surface, a spiral groove is formed in the bottom surface, and the spring seat is immersed in a flowing liquid medium. The spiral groove starts to extend smoothly from the center of the bottom surface until the spiral groove is internally tangent with the edge of the bottom surface, the internally tangent position is an opening, and the liquid medium can enter and exit from the opening.

Example one

A spiral groove is formed in the bottom surface 7 of the spring seat, the spring seat 1 is immersed in a flowing liquid medium, a gap 3 is formed between the surface of the spring seat 1 with the largest diameter and the wall surface 4 of the cavity, and the liquid medium can pass through the gap 3. A containing cavity 5 is formed between the bottom surface 7 of the spring seat and the wall surface 4 of the cavity, and the spring seat 1 can move in the containing cavity 5 under the action of spring force of the force application part 6 and the spring installation surface 5, so that the volume of the containing cavity 5 is changed. The movement of spring seat 1 promotes the flow of fluid within pocket 5, thereby allowing oil to flow within the helical groove in the bottom surface 7 of the spring seat. Pressure exists in the cavity 5, the spiral groove is located in the cavity 5, the surface areas of the inner surface 8 of the spiral groove and the outer surface 9 of the spiral groove are different, so that hydraulic pressure acting on the two areas is different, the force acts on the spring seat 1, the spring seat 1 is subjected to a moment around the axis of the spring seat 1, and the spring seat 1 rotates. The rotating motion of the spring seat 1 changes the friction form when the spring seat 1 contacts with the cavity wall surface 4, and the spring seat 1 is not clamped in the cavity 5 due to deflection, so that the associated valve core can be flexibly opened and closed.

The spiral groove 10 in the second embodiment is the same in structure and function as the spiral groove in the first embodiment, except that it is placed on the end face of the spool valve body 11 of the spool valve.

Claims

1. A spring seat for hydraulic valve parts comprises a valve core, a spring seat and a structural body, wherein the spring is arranged on the spring seat and provides elasticity for the valve core;

it is characterized in that: the two ends of the spring seat are respectively provided with a spring mounting surface and a bottom surface, a spiral groove is formed in the bottom surface, and the bottom surface of the spring seat is immersed in a flowing liquid medium.

2. A spring seat for a hydraulic valve member as defined in claim 1, wherein: the spiral groove starts to extend smoothly from the center of the bottom surface until the spiral groove is internally tangent with the edge of the bottom surface, and the internally tangent position is an opening.

3. A spring seat for a hydraulic valve member as defined in claim 1, wherein: the helical groove width remains consistent.

4. A spring seat for a hydraulic valve member as defined in claim 1, wherein: the cross section of the spiral groove is arc-shaped.

5. A spring seat for a hydraulic valve member as defined in claim 1, wherein: the spring seat is in clearance fit with the cavity.

6. A spring seat for a hydraulic valve member as defined in claim 1, wherein: the hydraulic valve is an overflow valve.

7. A spring seat for a hydraulic valve member as defined in claim 6, wherein: the inlet pressure of the overflow valve is more than 26MPa, and the flow is less than 10L/min.

8. A spring seat for a hydraulic valve member as defined in claim 1, wherein: the hydraulic valve is a fixed-differential pressure reducing valve.