CN219035574U

CN219035574U - Electronic expansion valve

Info

Publication number: CN219035574U
Application number: CN202122410246.4U
Authority: CN
Inventors: 詹少军; 贺宇辰; 徐冠军
Original assignee: Zhejiang Dunan Machinery Co Ltd
Current assignee: Zhejiang Dunan Machinery Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2023-05-16
Anticipated expiration: 2031-09-30

Abstract

The utility model provides an electronic expansion valve, comprising: the valve body is provided with a containing cavity, and a valve port is arranged on the valve body; the guide sleeve is arranged in the accommodating cavity, is fixedly connected to the valve body, and is provided with a guide hole with the diameter of D1; the valve sleeve is movably arranged in the guide hole in a penetrating way, the valve sleeve is used for sealing the valve port, an annular groove is formed in the outer side wall of the valve sleeve, and the annular groove and the valve sleeve are coaxially arranged; the sealing ring is arranged between the guide hole and the annular groove, the outer diameter of the sealing ring is D2, D2 is larger than D1, and the difference value range between D2 and D1 is 0.1mm to 0.5mm. By adopting the technical scheme, the problem that a sealing ring between a valve sleeve and a guide sleeve in the prior art is easy to wear is solved.

Description

Electronic expansion valve

Technical Field

The utility model relates to the technical field of control valves, in particular to an electronic expansion valve.

Background

The electronic expansion valve has the advantages of high precision and the like, and is widely applied to the technical fields of refrigeration systems and the like. The electronic expansion valve in the prior art specifically comprises a valve body, a valve sleeve, a guide sleeve and other parts, wherein a valve port is formed in the valve body, the guide sleeve is fixedly arranged in the valve body, the valve sleeve is movably arranged in the guide sleeve, and the valve sleeve is used for blocking or opening the valve port. A sealing ring is arranged between the valve sleeve and the guide sleeve to prevent fluid from entering a dry area inside the electronic expansion valve through a gap between the guide sleeve and the valve sleeve. However, the existing electronic expansion valve is easy to be excessively tight between the sealing ring and the guide sleeve in an assembling mode, and the sealing ring and the valve sleeve need to move up and down along the guide sleeve, so that the sealing ring is easy to wear, and the service life of the electronic expansion valve is short.

Disclosure of Invention

The utility model provides an electronic expansion valve, which solves the problem that a sealing ring between a valve sleeve and a guide sleeve in the prior art is easy to wear.

The present utility model provides an electronic expansion valve, comprising: the valve body is provided with a containing cavity, and a valve port is arranged on the valve body; the guide sleeve is arranged in the accommodating cavity, is fixedly connected to the valve body, and is provided with a guide hole with the diameter of D1; the valve sleeve is movably arranged in the guide hole in a penetrating way, the valve sleeve is used for sealing the valve port, an annular groove is formed in the outer side wall of the valve sleeve, and the annular groove and the valve sleeve are coaxially arranged; the sealing ring is arranged between the guide hole and the annular groove, the outer diameter of the sealing ring is D2, D2 is larger than D1, and the difference value range between D2 and D1 is 0.1mm to 0.5mm.

By applying the technical scheme of the utility model, the outer side wall of the valve sleeve is provided with the annular groove, and the sealing ring is arranged between the guide hole and the annular groove, so that the sealing ring can be stably kept between the guide hole and the valve sleeve; the outer diameter of the sealing ring is D2, the diameter of the guide hole is D1, D2 is larger than D1, the difference between D2 and D1 ranges from 0.1mm to 0.5mm, if the difference between D2 and D1 is smaller than 0.1mm, the sealing effect between the guide sleeve and the valve sleeve is poor, if the difference between D2 and D1 is larger than 0.5mm, the mutual extrusion force between the sealing ring and the guide sleeve is large, so that the friction force between the sealing ring and the guide sleeve is large, and the sealing ring is easy to wear, therefore, the difference between D2 and D1 ranges from 0.1mm to 0.5mm, the sealing effect between the guide sleeve and the valve sleeve is good, the abrasion to the sealing ring is reduced, and the service life of the sealing ring can be prolonged; friction force is arranged between the sealing ring and the guide sleeve and between the sealing ring and the valve sleeve, so that the valve sleeve can be prevented from moving relative to the guide sleeve.

Further, the inner diameter of the annular groove is D4, the inner diameter of the sealing ring is D5, and the difference between D4 and D5 ranges from-0.5 mm to 0.5mm. The sealing device is arranged in such a way, the sealing performance between the annular groove and the sealing ring is good, the extrusion force between the sealing ring and the annular groove is small, and the abrasion of the sealing ring is reduced.

Further, the width of the annular groove is L1, the cross section diameter of the sealing ring is D3, and L1 is 1.1 times to 1.4 times of D3. The setting can prevent that the sealing washer from removing by a wide margin in the annular groove when the sealing washer is installed to the further wearing and tearing to the sealing washer that reduces.

Further, the outer diameter D2 of the seal ring ranges from 6.5mm to 8.5mm. Since the difference between D2 and D1 ranges from 0.1mm to 0.5mm, the diameter D1 of the pilot hole ranges from 6 to 8.4mm. The arrangement can not only enable the guide hole to be easily processed, but also enable the structure size of the guide sleeve to be smaller.

Further, the cross-sectional diameter D3 of the seal ring ranges from 0.5mm to 1mm. The sealing ring is convenient to process and saves raw materials.

Further, the annular groove is located in the middle of the valve sleeve, so that structural strength of the valve sleeve can be guaranteed, and the possibility that the sealing ring is separated from the annular groove can be reduced.

Further, the distance from the center line of the annular groove perpendicular to the axis to the end of the valve sleeve is L2, L2 being 35% to 65% of the length L3 of the valve sleeve.

Further, the distance L2 from the centerline of the annular groove perpendicular to the axis to the end of the valve sleeve ranges from 6.5mm to 8mm. The valve sleeve is arranged in such a way that the structural strength of the valve sleeve can be ensured, and the overall miniaturization design of the device is facilitated.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 shows a schematic structural diagram of an electronic expansion valve provided by the utility model;

fig. 2 shows a schematic structural view of the valve sleeve provided by the utility model;

fig. 3 shows a schematic structural view of a guide sleeve provided by the utility model;

fig. 4 shows a schematic structural diagram of the seal ring provided by the utility model.

Wherein the above figures include the following reference numerals:

10. a valve body; 11. a receiving chamber; 12. a valve port; 20. a guide sleeve; 21. a guide hole; 30. a valve sleeve; 31. an annular groove; 40. and (3) sealing rings.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 4, an embodiment of the present utility model provides an electronic expansion valve including a valve body 10, a guide sleeve 20, a valve housing 30, and a sealing ring 40. The valve body 10 has a receiving chamber 11, and a valve port 12 is provided on the valve body 10, the valve port 12 being in communication with the receiving chamber 11, the valve port 12 being for circulating fluid. The guide sleeve 20 is arranged in the accommodating cavity 11, the guide sleeve 20 is fixedly connected to the valve body 10, and the guide sleeve 20 is provided with a guide hole 21. A valve sleeve 30 is movably inserted into the guide hole 21, and the valve sleeve 30 is used for sealing the valve port 12. The guide hole 21 is used for guiding the valve sleeve 30 so that the valve sleeve 30 accurately seals the valve port 12. An annular groove 31 is provided on the outer sidewall of the valve housing 30, the annular groove 31 is provided coaxially with the valve housing 30, and a seal ring 40 is provided between the guide hole 21 and the annular groove 31. The sealing ring 40 is used for sealing a gap between the guide hole 21 and the valve sleeve 30, so that fluid can be prevented from entering the upper part of the guide sleeve 20 to damage or corrode parts of the electronic expansion valve, and the valve sleeve 30 can be prevented from moving.

Wherein, the external diameter of the sealing ring 40 is D2, the diameter of the guiding hole 21 is D1, D2 is set to be larger than D1, and the difference between D2 and D1 is set to be between 0.1mm and 0.5mm. If the outer diameter D2 of the seal ring 40 is smaller than the diameter D1 of the guide hole 21, the seal ring 40 cannot completely seal the gap between the guide hole 21 and the valve housing 30, and therefore setting the outer diameter D2 of the seal ring 40 larger than the diameter D1 of the guide hole 21 can completely seal the gap between the guide hole 21 and the valve housing 30. If the difference between D2 and D1 is less than 0.1mm, the sealing effect between the guide sleeve and the valve sleeve is poor, and if the difference between D2 and D1 is greater than 0.5mm, the mutual extrusion force between the sealing ring and the guide sleeve is large, so that the friction force between the sealing ring and the guide sleeve is large, and the sealing ring is easy to wear, therefore, the difference between D2 and D1 is set to be 0.1mm to 0.5mm, the sealing effect between the guide sleeve and the valve sleeve is good, the sealing ring is difficult to wear, and the service life of the sealing ring is prolonged.

By applying the technical scheme of the utility model, the outer side wall of the valve sleeve 30 is provided with the annular groove 31, and the sealing ring 40 is arranged between the guide hole 21 and the annular groove 31, so that the sealing ring 40 can be stably kept between the guide hole 21 and the valve sleeve 30; the difference range between D2 and D1 is set to be 0.1mm to 0.5mm, so that the sealing effect between the guide sleeve 20 and the valve sleeve 30 is good, the sealing ring 40 is not easy to wear, and the service life of the sealing ring 40 can be prolonged. In addition, friction is provided between the sealing ring 40 and the guide sleeve 20 and between the valve sleeve 30, so that the valve sleeve 30 can be prevented from moving relative to the guide sleeve 20.

As shown in fig. 2 and 4, specifically, the inner diameter of the annular groove 31 is D4, the inner diameter of the seal ring 40 is D5, and the difference between D4 and D5 ranges from-0.5 mm to 0.5mm. If the value of D4 minus D5 is smaller than-0.5 mm, the gap between the annular groove 31 and the sealing ring 40 is larger, the sealing ring 40 is easy to be extruded and deformed by the inner wall of the guide hole 21, so that the sealing ring 40 and the guide sleeve 20 or the annular groove 31 are not tightly attached together, and the sealing property of the sealing ring 40 is poor; if the value of D4 minus D5 is greater than 0.5mm, the sealing ring 40 and the annular groove 31 are mutually extruded, so that the sealing ring 40 is always kept in a tensioning state, the sealing ring 40 is easy to fatigue, and the service life of the sealing ring 40 is further shortened; therefore, the difference between D4 and D5 ranges from-0.5 mm to 0.5mm, which not only can make the sealing performance of the sealing ring 40 better, but also can ensure the service life of the sealing ring 40 longer.

In the present embodiment, the annular groove 31 has a width L1, the seal ring 40 has a cross-sectional diameter D3, and L1 is 1.1 to 1.4 times the diameter D3. If L1 is less than 1.1 times D3, there is not enough space in the annular groove 31 to accommodate the seal ring 40 when the seal ring 40 and the guide sleeve 20 are pressed against each other, so that the seal ring 40 is easily separated from the annular groove 31 when the valve sleeve 30 moves along the guide sleeve 20; if L1 is greater than 1.4 times of D3, the space in the annular groove 31 is too large, and the sealing ring 40 will also displace relative to the annular groove 31 when the valve sleeve 30 moves along the guide sleeve 20, so that friction forces are generated between the sealing ring 40 and the annular groove 31 and between the sealing ring 40 and the guide sleeve 20, and the sealing ring 40 is easily worn; accordingly, setting L1 to 1.1 to 1.4 times D3 can not only enable the seal ring 40 to be stably disposed in the annular groove 31, but also prevent the seal ring 40 from being excessively worn.

Specifically, the outer diameter D2 of the seal ring 40 ranges from 6.5mm to 8.5mm. Since the difference between D2 and D1 ranges from 0.1mm to 0.5mm, the diameter D1 of the guide hole 21 ranges from 6mm to 8.4mm. If D1 is smaller than 6mm, the processing of the pilot hole 21 is complicated. If D1 is greater than 8.4mm, the guide sleeve 20 has a large structural size, resulting in a reduction in the space of the accommodating chamber 11 and thus in the flow rate of fluid. Accordingly, the range of D1 is set to 6mm to 8.4mm, which enables easy processing of the guide hole 21 and also enables a small structural size of the guide bush 20. In particular, D2 may be 6.5mm, 7.5mm or 8.5mm; d1 may be 6mm, 7mm or 8.4mm.

Specifically, the cross-sectional diameter D3 of the seal ring 40 ranges from 0.5mm to 1mm. If the diameter D of the cross section of the seal ring 40 is smaller than 0.5mm, the seal ring 40 is difficult to process due to the smaller size, and the wear resistance is poor; if the diameter D of the cross section of the sealing ring 40 is larger than 1mm, more raw materials are needed for processing the sealing ring 40, and the cost is high; therefore, the cross-sectional diameter D3 of the seal ring 40 is set to be in the range of 0.5mm to 1mm, which facilitates the processing of the seal ring 40 and saves raw materials. In particular, D3 may be 0.5mm, 0.75mm or 1mm.

In this embodiment, the annular groove 31 is located in the middle of the valve sleeve 30. The annular groove 31 is provided in the middle of the valve housing 30, structural strength of the valve housing 30 and the annular groove 31 can be ensured, and the provision of the annular groove 31 in the middle of the valve housing 30 can also reduce the possibility that the seal ring 40 is disengaged from the annular groove 31.

Wherein the distance from the center line of the annular groove 31 perpendicular to the axis to the end of the valve sleeve 30 is L2, L2 being 35% to 65% of the length L3 of the valve sleeve 30. When L2 is less than 35% of L3 or L2 is greater than 65% of L3, the annular groove 31 is close to the edge of the valve sleeve 30, and the annular groove 31 tends to result in poor structural strength of the valve sleeve 30. Accordingly, setting L2 to 35% to 65% of L3 can make the structural strength of the valve housing 30 large. Specifically, L2 may be 50% of L3.

The distance L2 from the center line of the annular groove 31 perpendicular to the axis to the end of the valve sleeve 30 ranges from 6.5mm to 8mm, while satisfying the above-described proportional relationship. If L2 is less than 6.5mm, the overall length of the valve sleeve 30 is short, which is detrimental to product processing and flow control. If L2 is greater than 8mm, the valve housing 30 is overall long, thereby making the structural size of the valve body 10 large and increasing the product cost. Accordingly, the range of L2 is set to 6.5mm to 8mm, so that the structural strength of the valve housing 30 can be ensured, and the flow rate can be controlled easily. In particular, L2 may be 6.5mm, 7.5mm or 8mm.

By applying the technical scheme of the utility model, the outer side wall of the valve sleeve 30 is provided with the annular groove 31, and the sealing ring 40 is arranged between the guide hole 21 and the annular groove 31, so that the sealing ring 40 can be stably kept between the guide hole 21 and the valve sleeve 30; the difference value range between D2 and D1 is set to be 0.1mm to 0.5mm, so that the sealing effect between the guide sleeve 20 and the valve sleeve 30 is good, and the sealing ring 40 is not easy to wear; the inner diameter of the annular groove 31 is D4, the inner diameter of the sealing ring 40 is D5, and the difference value between the D4 and the D5 ranges from-0.5 mm to 0.5mm, so that the sealing performance of the sealing ring 40 is good, and the service life of the sealing ring 40 is long; the width of the annular groove 31 is L, the cross section diameter of the sealing ring 40 is D3, and L is 1.1 to 1.4 times of D3, so that the sealing ring 40 can be stably arranged in the annular groove 31, and the sealing ring 40 can be prevented from being excessively worn.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An electronic expansion valve, comprising:

a valve body (10), wherein the valve body (10) is provided with a containing cavity (11), and a valve port (12) is arranged on the valve body (10);

the guide sleeve (20) is arranged in the accommodating cavity (11), the guide sleeve (20) is fixedly connected to the valve body (10), the guide sleeve (20) is provided with a guide hole (21), and the diameter of the guide hole (21) is D1;

the valve sleeve (30) is movably arranged in the guide hole (21) in a penetrating mode, the valve sleeve (30) is used for sealing the valve port (12), an annular groove (31) is formed in the outer side wall of the valve sleeve (30), and the annular groove (31) and the valve sleeve (30) are coaxially arranged;

the sealing ring (40), sealing ring (40) set up guiding hole (21) with between annular groove (31), the external diameter of sealing ring (40) is D2, and D2 is greater than D1, and D2 and D1's difference scope is between 0.1mm to 0.5mm.

2. Electronic expansion valve according to claim 1, characterized in that the inner diameter of the annular groove (31) is D4, the inner diameter of the sealing ring (40) is D5, and the difference between D4 and D5 is in the range of-0.5 mm to 0.5mm.

3. Electronic expansion valve according to claim 1, characterized in that the annular groove (31) has a width L1, the sealing ring (40) has a cross-sectional diameter D3, L1 being 1.1 to 1.4 times D3.

4. Electronic expansion valve according to claim 1, characterized in that the outer diameter D2 of the sealing ring (40) ranges from 6.5mm to 8.5mm.

5. Electronic expansion valve according to claim 1, characterized in that the cross-sectional diameter D3 of the sealing ring (40) ranges from 0.5mm to 1mm.

6. Electronic expansion valve according to claim 1, characterized in that the annular groove (31) is located in the middle of the valve sleeve (30).

7. Electronic expansion valve according to claim 1, characterized in that the distance from the centre line of the annular groove (31) perpendicular to the axis to the end of the valve sleeve (30) is L2, L2 being 35% to 65% of the length L3 of the valve sleeve (30).

8. Electronic expansion valve according to claim 7, characterized in that the distance L2 from the centre line of the annular groove (31) perpendicular to the axis to the end of the valve sleeve (30) ranges from 6.5mm to 8mm.