WO2024037275A1

WO2024037275A1 - Valve needle component and electronic expansion valve

Info

Publication number: WO2024037275A1
Application number: PCT/CN2023/108464
Authority: WO
Inventors: 赵俊; 贺宇辰; 徐冠军
Original assignee: 浙江盾安人工环境股份有限公司
Priority date: 2022-08-16
Filing date: 2023-07-20
Publication date: 2024-02-22
Also published as: CN217898829U

Abstract

Disclosed is a valve needle component, comprising a screw rod (10), an assembly sleeve (20), and an annular structure (30), the annular structure (30) being arranged inside the assembly sleeve (20), and a part of the screw rod (10) being arranged in the annular structure (30) in a penetrating manner; a flat washer (40), the flat washer (40) being arranged inside the assembly sleeve (20), the flat washer (40) having a first end surface (41) and a second end surface (42), the first end surface (41) abutting against the annular structure (30), and the flat washer (40) being of a hollow annular structure; and a valve needle structure (50), the valve needle structure (50) abutting against the second end surface (42). The flat washer is of a flat hollow annular structure, is easy to produce, and has a high material utilization rate such that the cost is low; and the flat washer is arranged inside the assembly sleeve and is located between the annular structure and the valve needle structure, thereby preventing the annular structure from coming into direct contact with the valve needle structure, further reducing friction between the annular structure and the valve needle structure, and thus improving the working reliability of the whole valve needle component and prolonging the service life of the whole valve needle component. Further disclosed is an electronic expansion valve using the valve needle component.

Description

Valve needle parts and electronic expansion valve

This application claims priority to the patent application submitted to the State Intellectual Property Office of China on August 16, 2022, with application number 2022221557994 and titled "Valve Needle Parts and Electronic Expansion Valve".

Technical field

The present application relates to the technical field of electronic expansion valves, specifically, to a valve needle component and an electronic expansion valve.

Background technique

At present, the gasket provided with the valve needle component of the existing electronic expansion valve usually adopts a ring structure with a stepped hole in the inner hole. The overall structure of the gasket requires finishing steps such as turning, resulting in the requirements of the gasket. The machining process is complex, so the processing cost of the gasket is high, resulting in the price of the gasket being more expensive.

Application content

The present application provides a valve needle component and an electronic expansion valve to solve the problem in the prior art that the machining process required by the gasket is complicated, resulting in high gasket processing costs.

In order to solve the above problems, according to one aspect of the present application, the present application provides a valve needle component, which includes: a screw; an assembly set; an annular structure, the annular structure is arranged in the assembly set, and a part of the screw is inserted into the annular structure; a flat gasket, the flat gasket is arranged in the assembly set, the flat gasket has a first end surface and a second end surface; the first end surface is in contact with the annular structure, the flat gasket is a hollow annular structure; the valve needle structure, the valve needle structure Contact with the second end surface.

Furthermore, the flat gasket is a stamped one-piece gasket.

Further, the thickness of the flat gasket is 0.3mm～0.8mm.

Further, the surface roughness of the flat gasket is less than 0.8 microns.

Further, the hardness of the first end surface is greater than the hardness of the annular structure, the valve needle structure includes a valve needle and an elastic member that axially cooperate with each other, the second end surface is in contact with the elastic member, the hardness of the second end surface is greater than the hardness of the elastic member, and the device Comes with radially fixed valve needle.

Further, one end of the valve needle penetrates into the assembly set and the other end of the valve needle is located outside the assembly set, or the valve needle and the assembly set are integrated structures.

Further, the elastic member is a spring, the middle diameter of the spring is D2, and the inner hole diameter of the flat gasket is d, D2>d.

Further, the spring is ground flat at both ends.

Further, the outer diameter dimension of the flat gasket is D, the assembly set includes a sleeve body, the flat gasket is located in the sleeve body, and the inner diameter size of the sleeve body is D1, D1-D=0.1~1mm.

Further, one end of the screw is provided with a flanging structure, and the flanging structure is limited to one end of the annular structure; the outer diameter of the flanging structure after flanging is D3, and the inner hole diameter of the flat gasket is d, d-D3 =0.9~1.8mm.

Further, the annular structure is a bearing, the inner ring diameter of the bearing is D4, the outer ring diameter of the bearing is D5, the outer diameter size of the flat gasket is D, and the inner hole diameter of the flat gasket is d; where, d>D4, D<D5; the hardness of the outer ring of the bearing is less than the hardness of the first end face.

Further, a metal plating layer is provided on the first end surface and/or the second end surface of the flat gasket.

According to another aspect of the present application, an electronic expansion valve is provided. The electronic expansion valve includes the above-mentioned valve needle component.

Applying the technical solution of the present application, a valve needle component is provided, including: a screw; an assembly set; an annular structure, the annular structure is arranged in the assembly set, and a part of the screw is penetrated in the annular structure; a flat gasket, a flat gasket Set in the assembly set, the flat gasket has a first end surface and a second end surface; the first end surface is in contact with the annular structure, and the flat gasket is a hollow annular structure; the valve needle structure is in contact with the second end surface. The flat gasket is a flat plate-shaped hollow ring structure, which is easy to process, has high material utilization rate and low cost; the flat gasket is built into the assembly set and is located between the ring structure and the valve needle structure, which avoids the direct connection between the ring structure and the valve needle structure. Contact, thereby reducing the friction between the annular structure and the valve needle structure, improving the overall working reliability and service life of the valve needle component.

Description of drawings

The description and drawings that constitute a part of this application are used to provide a further understanding of this application. The illustrative embodiments and their descriptions of this application are used to explain this application and do not constitute an improper limitation of this application. In the attached picture:

Figure 1 shows a schematic structural diagram of a valve needle component provided by an embodiment of the present application;

Figure 2 shows a schematic structural diagram of a flat gasket provided by an embodiment of the present application;

Figure 3 shows a schematic structural diagram of an assembly set provided by an embodiment of the present application;

Figure 4 shows a schematic structural diagram of a spring provided by an embodiment of the present application;

Figure 5 shows a schematic structural diagram of a bearing provided by an embodiment of the present application.

Among them, the above-mentioned drawings include the following reference signs:
10. Screw; 11. Flange structure;
20. Assembly set; 21. Cover body;
30. Ring structure; 31. Bearing;
40. Flat gasket; 41. First end face; 42. Second end face;
50. Valve needle structure; 51. Valve needle; 52. Elastic member; 521. Spring.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application or its application or uses. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

As shown in Figures 1 to 5, the embodiment of the present application provides a valve needle component, including: a screw 10; an assembly set 20; an annular structure 30. The annular structure 30 is provided in the assembly set 20, and a part of the screw 10 passes through it. Provided in the annular structure 30; a flat gasket 40, the flat gasket 40 is provided in the assembly set 20, the flat gasket 40 has a first end surface 41 and a second end surface 42; the first end surface 41 is in contact with the annular structure 30, and the flat gasket 40 is arranged in the assembly set 20. The gasket 40 is a hollow annular structure; the valve needle structure 50 is in contact with the second end surface 42 . The flat gasket 40 is a flat plate-shaped hollow annular structure, which is simple to process, has high material utilization rate and is low in cost; the flat gasket 40 is built into the assembly set 20 and is located between the annular structure 30 and the valve needle structure 50, avoiding the need for an annular structure. 30 is in direct contact with the valve needle structure 50, thereby reducing the friction between the annular structure 30 and the valve needle structure 50, and improving the overall working reliability and service life of the valve needle component.

As shown in Figure 2, the flat gasket 40 is a stamped one-piece gasket. The flat gasket 40 is processed by stamping technology, which is simple. The flat gasket 40 is integrally formed by stamping processing, and the processing efficiency is high, which effectively reduces the processing cost of the gasket in the valve needle component.

The thickness of the flat gasket 40 is 0.3mm ~ 0.8mm. The thickness and size range of the flat gasket 40 ensures that the flat gasket 40 is as light and thin as possible and saves more materials under the condition that the strength of the flat gasket 40 meets the actual use requirements. , further reducing costs.

The surface roughness of the flat gasket 40 is less than 0.8 microns. Under the condition that it meets the actual use requirements, the surface roughness of the flat gasket 40 is lower than the surface roughness requirements of the existing gaskets, which saves money on surface roughness. processing steps, reducing processing costs.

The hardness of the first end face 41 is greater than the hardness of the annular structure 30. The valve needle structure 50 includes a valve needle 51 and an elastic member 52 that axially cooperate with each other. The second end face 42 is in contact with the elastic member 52. The hardness of the second end face 42 is greater than the elasticity. The hardness of the piece 52 is determined, and the assembly piece 20 radially fixes the valve needle 51. The difference in hardness between the first end face 41 and the annular structure 30 reduces the deformation of the first end face 41, effectively reduces the friction coefficient between the first end face 41 and the annular structure 30, and improves the wear resistance of the first end face 41; The difference in hardness between the second end surface 42 and the elastic member 52 reduces the deformation of the second end surface 42 , effectively reduces the friction coefficient between the second end surface 42 and the elastic member 52 , and improves the wear resistance of the second end surface 42 .

In a specific embodiment of the present application, the material of the flat gasket 40 is engineering plastics or metal parts; the first end surface 41 and the second end surface 42 of the flat gasket 40 are provided with a metal plating layer and are made of wear-resistant metal. The metal plating further reduces the wear of the first end surface 41 and the second end surface 42 .

In a specific embodiment of the present application, the valve needle 51 and the assembly set 20 are two separate parts. One end of the valve needle 51 penetrates into the assembly set 20 and the other end of the valve needle 51 is located outside the assembly set 20 . The valve needle structure 50 also includes a connecting ring. The connecting ring penetrates into the assembly set 20 and is fixedly connected to the assembly set 20 . The valve needle 51 passes through the connecting ring and is fixedly connected to the connecting ring.

Or, in another specific embodiment of the present application, the valve needle 51 and the assembly set 20 are of an integrated structure, that is, the valve needle 51 and the assembly set 20 are one part, which can reduce the number of parts. At the same time, the assembly set 20 also includes a matching Snap ring, used to limit the ring structure.

As shown in Figures 2 and 4, the elastic member 52 is a spring 521, the middle diameter of the spring 521 is D2, and the inner hole diameter of the flat gasket 40 is d, D2>d. This arrangement ensures that the spring 521 will not be embedded in the inner hole of the flat gasket 40 .

The spring 521 is a spring with both ends ground tightly together. Grinding and grinding the spring at both ends can ensure that the valve opening performance of the valve needle component is in an optimal state; it should be noted that: parallel tightening means that the last two turns of the two ends of spring 521 are fit, and grinding and smoothing means that the last turn of spring 521 The spring wire is ground flat to ensure that the end face of the spring 521 is a flat surface; tightening can help the spring 521 to be smoother when ground and less prone to height differences; the contact between the ground spring 521 and the second end face 42 is smoother , effectively reducing the friction force and reducing the wear of the second end surface 42 of the spring 521 and the flat washer 40.

As shown in Figures 2 and 3, the outer diameter of the flat gasket 40 is D. The assembly set 20 includes a sleeve 21. The flat gasket 40 is located in the sleeve 21. The inner diameter of the sleeve 21 is D1, D1-D. =0.1~1mm. This arrangement ensures accurate radial positioning of the flat gasket 40 and meets actual usage requirements.

As shown in Figures 1 and 2, one end of the screw 10 is provided with a flange structure 11, and the flange structure 11 is limited to one end of the annular structure 30; the outer diameter of the flange structure 11 after flanging is D3, and the flat pad The inner hole diameter of the sheet 40 is d, d-D3=0.9~1.8mm. This arrangement ensures that even if the flat gasket 40 is tilted in the axial direction in the assembly set 20 , the inner hole of the flat gasket 40 will not interfere with the flange structure 11 of the screw 10 .

As shown in Figures 2 and 5, the annular structure 30 is a bearing 31. The inner ring diameter of the bearing 31 is D4, the outer ring diameter of the bearing 31 is D5, the outer diameter of the flat gasket 40 is D, and the outer diameter of the flat gasket 40 is D. The diameter of the inner hole is d; where, d>D4, D<D5; the hardness of the outer ring of the bearing 31 is smaller than the hardness of the first end surface 41. This arrangement ensures that the inner ring of the bearing 31 is not in direct contact with the flat gasket 40 to prevent the flat gasket 40 from affecting the rotation of the inner ring of the bearing 31; at the same time, it ensures that the annular range of the first end face 41 falls within the inner and outer rings of the bearing 31 Within the range, the effective contact between the flat gasket 40 and the bearing 31 is ensured.

In this embodiment, a metal plating layer is provided on the first end surface 41 and/or the second end surface 42 of the flat gasket 40 . The hardness and wear resistance of the metal plating layer are greater than that of the flat gasket 40 body, which can improve the performance of the flat gasket 40 . service life.

This application also proposes an electronic expansion valve, which includes the above-mentioned valve needle component. The flat gasket 40 provided in the electronic expansion valve is a hollow annular structure, which is simple to process, has high material utilization rate and is low in cost; the flat gasket 40 is built into the assembly set 20 and is located between the annular structure 30 and the valve needle structure 50. Direct contact between the annular structure 30 and the valve needle structure 50 is avoided, thereby reducing the friction between the annular structure 30 and the valve needle structure 50, and improving the overall working reliability and service life of the valve needle component in the electronic expansion valve. Therefore, The electronic expansion valve using the above-mentioned valve needle component has low cost and reliable operation.

To sum up, the flat gasket 40 proposed in this application has a hollow annular structure, which is simple to process, has high material utilization rate and is low in cost; the flat gasket 40 is built into the assembly set 20 and is located between the annular structure 30 and the valve needle structure 50 In the middle, direct contact between the annular structure 30 and the valve needle structure 50 is avoided, thereby reducing the friction between the annular structure 30 and the valve needle structure 50 and improving the overall working reliability and service life of the valve needle component.

The above descriptions are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the protection scope of this application.

Claims

A valve needle component, characterized in that it includes:

screw(10);

Assembly set(20);

Annular structure (30), the annular structure (30) is arranged in the assembly set (20), and a part of the screw (10) is penetrated in the annular structure (30);

Flat gasket (40), the flat gasket (40) is arranged in the assembly set (20), the flat gasket (40) has a first end surface (41) and a second end surface (42); The first end surface (41) is in contact with the annular structure (30), and the flat gasket (40) is a hollow annular structure;

The valve needle structure (50) is in contact with the second end surface (42).
The valve needle component according to claim 1, characterized in that the flat gasket (40) is a stamped one-piece gasket.
The valve needle component according to claim 1, characterized in that the thickness of the flat gasket (40) is 0.3 mm to 0.8 mm.
The valve needle component according to claim 1, wherein the surface roughness of the flat gasket (40) is less than 0.8 microns.
The valve needle component according to claim 1, characterized in that the hardness of the first end surface (41) is greater than the hardness of the annular structure (30), and the valve needle structure (50) includes axially matching joints. The valve needle (51) and the elastic member (52) are in contact with the second end surface (42) and the elastic member (52). The hardness of the second end surface (42) is greater than that of the elastic member (52). Hardness, the assembly set (20) radially fixes the valve needle (51).
The valve needle component according to claim 5, characterized in that one end of the valve needle (51) penetrates into the assembly set (20) and the other end of the valve needle (51) is located in the assembly set. (20), or the valve needle (51) and the assembly set (20) are of an integrated structure.
The valve needle component according to claim 6, characterized in that the elastic member (52) is a spring (521), the middle diameter of the spring (521) is D2, and the inner diameter of the flat gasket (40) is D2. The hole diameter is d, D2>d.
The valve needle component according to claim 5, characterized in that the elastic member (52) is a spring (521), and the spring (521) is a spring with both ends ground tightly together.
The valve needle component according to claim 1, characterized in that the outer diameter of the flat gasket (40) is D, the assembly set (20) includes a sleeve (21), and the flat gasket (40) 40) is located in the sleeve body (21), and the inner diameter size of the sleeve body (21) is D1, D1-D=0.1~1mm.
The valve needle component according to claim 1, characterized in that one end of the screw (10) is provided with a flange structure (11), and one end of the flange structure (11) and the annular structure (30) Limiting fit; the outer diameter of the flanged structure (11) after flanging is D3, and the inner hole diameter of the flat gasket (40) is d, d-D3=0.9~1.8mm.
The valve needle component according to claim 1, characterized in that the annular structure (30) is a bearing (31), the inner ring diameter of the bearing (31) is D4, and the outer ring of the bearing (31) The diameter is D5, the outer diameter of the flat gasket (40) is D, and the inner hole diameter of the flat gasket (40) is d; where, d>D4, D<D5; the bearing (31) The hardness of the outer ring is smaller than the hardness of the first end surface (41).
The valve needle component according to claim 1, characterized in that a metal plating layer is provided on the first end surface (41) and/or the second end surface (42) of the flat gasket (40).
An electronic expansion valve, characterized in that the electronic expansion valve includes the valve needle component according to any one of claims 1 to 12.