CN219282461U

CN219282461U - Electric valve

Info

Publication number: CN219282461U
Application number: CN202223476135.4U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-06-30
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses an electric valve, which comprises a rotating assembly and a valve core, wherein the rotating assembly comprises a screw rod, the screw rod is in threaded fit with the valve core, the screw rod is provided with an annular flange, the annular flange is provided with a first limiting part, the valve core is provided with a second limiting part, and when the valve core is positioned at a maximum valve opening position, the first limiting part is abutted with the second limiting part along the circumferential direction of the screw rod. In the above scheme, the annular flange is provided with the first limiting part, the valve core is provided with the second limiting part, and when the valve core is at the maximum valve opening position, the first limiting part and the second limiting part are in circumferential offset so as to replace axial contact through circumferential contact, thereby reducing or eliminating friction moment between the annular flange and the valve core, and being beneficial to improving the smoothness of valve core starting.

Description

Electric valve

Technical Field

The utility model relates to the technical field of fluid control, in particular to an electric valve.

Background

In air conditioning systems or thermal management systems, electrically operated valves are often used as throttling elements for regulating the on/off and flow of a fluid medium.

The electric valve comprises a rotating assembly and a valve core, wherein the rotating assembly comprises a screw rod, the valve core and the screw rod are in threaded fit, the screw rod is used for axially displacing under the drive of the screw rod, the annular flange is in threaded fit with the screw rod and can be abutted against the valve core along the axial direction to form axial limiting, however, due to the fact that a large contact area exists between the annular flange and the valve core, when the valve core is reversely started, the circumferential friction moment to be overcome is large, and the risk of locked rotation caused by insufficient driving force is easy to occur.

Therefore, how to provide a solution to overcome or alleviate the above-mentioned drawbacks is still a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The object of the present utility model is to provide an electrically operated valve whose valve element can be actuated relatively easily.

In order to solve the technical problems, the utility model provides an electric valve, which comprises a rotating assembly and a valve core, wherein the rotating assembly comprises a screw rod, the screw rod is in threaded fit with the valve core, a rod body and an annular flange are arranged on the screw rod, the annular flange is protruded relative to the rod body along the radial direction of the screw rod, a first limiting part is arranged on the annular flange, a second limiting part is arranged on the valve core, at least one of the first limiting part and the second limiting part is of a protruding structure, and when the valve core is at a maximum valve opening position, the first limiting part and the second limiting part are abutted along the circumferential direction of the screw rod.

Compared with the annular flange and the valve core which are abutted against each other along the axial direction to realize the axial limiting of the valve core, in the embodiment of the utility model, the screw rod is provided with the rod body and the annular flange, the annular flange is protruded relative to the rod body along the radial direction of the screw rod, the annular flange is provided with the first limiting part, the valve core is provided with the second limiting part, at least one of the first limiting part and the second limiting part is of a protruded structure, and when the valve core is at the maximum valve opening position, the first limiting part and the second limiting part are abutted against each other along the circumferential direction of the screw rod, so that the circumferential friction moment between the annular flange and the valve core is reduced or eliminated, and the smoothness of the valve core starting is improved.

Drawings

FIG. 1 is a schematic view of an embodiment of an electrically operated valve according to the present utility model;

FIG. 2 is a diagram of the connection structure of the lead screw, bearing and valve core of FIG. 1;

FIG. 3 is a schematic view of the structure of the screw in FIG. 1;

FIG. 4 is a bottom view of FIG. 3;

FIG. 5 is a schematic structural view of a valve core;

fig. 6 is a connection structure diagram of a screw, a bearing and a valve core in another embodiment of the electric valve provided by the present utility model.

The reference numerals are explained as follows:

1a rotating assembly, 11 screw rods, 111 rod bodies, 12 annular flanges, 121 limiting grooves, 121a circumferential groove walls, 121b radial groove walls, 121c axial groove bottom walls, 122 first limiting parts and 13 rotors;

2 valve core, 21 metal core, 22 plastic nut part, 221 second limit part;

3, a valve opening part;

4 valve seat, 41 bearing, 42 mounting hole section.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings and specific embodiments.

In embodiments of the present utility model, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, and for example, "connected" may be either detachably connected or non-detachably connected; may be directly connected or indirectly connected through an intermediate medium.

References to orientation terms, such as "inner", "outer", etc., in the embodiments of the present utility model are only with reference to the orientation of the drawings, and thus, the use of orientation terms is intended to better and more clearly describe and understand the embodiments of the present utility model, rather than to indicate or imply that the apparatus or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the embodiments of the present utility model. Furthermore, unless otherwise indicated herein, the term "plurality" as used herein refers to two or more.

In the description of embodiments of the present utility model, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Referring to fig. 1-6, fig. 1 is a schematic structural diagram of an embodiment of an electric valve according to the present utility model, fig. 2 is a connecting structure diagram of a screw, a bearing and a valve core in fig. 1, fig. 3 is a schematic structural diagram of the screw in fig. 1, fig. 4 is a bottom view of fig. 3, fig. 5 is a schematic structural diagram of the valve core, and fig. 6 is a connecting structure diagram of the screw, the bearing and the valve core in another embodiment of the electric valve according to the present utility model.

As shown in fig. 1, the present utility model provides an electric valve including a rotary member 1, a valve body 2, a valve opening portion 3, and a valve seat 4.

The valve seat 4 is located on one axial side of the valve opening 3, and the valve seat 4 may be located on an upper side of the valve opening 3 in the positional relationship and orientation of fig. 1. Referring to fig. 2, the valve seat 4 is further provided with a mounting hole section 42, the electric valve includes a bearing 41, at least part of the bearing 41 is located in the mounting hole section 42, the bearing 41 includes an inner ring 411 and an outer ring 412, and the inner ring 411 and the outer ring 412 can rotate relatively. The outer ring 412 can be fixedly connected to at least part of the wall of the valve seat 4 for forming the mounting hole section 42 in an interference fit manner so as to limit the relative position between the outer ring 412 and the valve seat 4, and the mounting manner has a simple structure and high reliability of fixation; in addition, the outer ring 412 and the valve seat 4 may be fixedly connected by welding, bonding, or the like, or the outer ring 412 and the valve seat 4 may be limitedly connected by riveting, clamping, or the like, so long as the relative position of the outer ring 412 and the valve seat 4 is unchanged after connection.

The rotating assembly 1 comprises a screw 11, a part of the screw 11 may be located in the valve seat 4, and a part of the screw 11 may be located in a hole of the inner ring 411. The annular flange 12 abuts against the inner ring 411 in the axial direction of the bearing 41. At least part of the screw 11 may be provided with an external thread section to which the valve cartridge 2 may be screwed. After assembly, a portion of the valve spool 2 may be located within the valve seat 4 and another portion of the valve spool 2 may be located within the valve port portion 3.

The rotating assembly 1 further comprises a rotor 13, and the rotor 13 is in transmission connection with the screw rod 11 and is used for driving the screw rod 11 to rotate.

And, there may be a limit fit in the circumferential direction between the valve element 2 and the valve seat 4, so that the valve element 2 cannot perform circumferential rotation with respect to the valve seat 4. In some embodiments, a guide groove extending along the axial direction may be provided in one of the valve core 2 and the valve seat 4, a guide block may be provided in the other of the valve core 2 and the valve seat 4, the guide block may be inserted into the guide groove and may slide along the guide groove, and limit fit of the valve core 2 and the valve seat 4 in the circumferential direction may be achieved by fit of the guide block and the guide groove. Alternatively, in other embodiments, it is also possible to set the outer contour of the valve element 2 to be non-circular, such as elliptical, etc., and set the valve element 2 moving hole in the valve seat 4 to be a non-circular hole matching the outer contour of the valve element 2.

The radially outer side of the rotating assembly 1 may also be provided with a stator assembly for electrical connection with the outside and for applying an excitation magnetic field to the rotating assembly 1. The specific structural form of the stator assembly is not limited herein, and in practical application, a person skilled in the art may set the stator assembly according to specific needs, so long as the stator assembly can meet the use requirements.

Under the action of an excitation magnetic field, the rotating assembly 1 can circumferentially rotate, the screw rod 11 can circumferentially rotate, and then the valve core 2 can axially displace along the screw rod 11 when the screw rod 11 rotates based on the connection relation between the valve core 2 and the screw rod 11 and the matching relation between the valve core 2 and the valve seat 4, so that the opening degree adjustment of the valve opening, the valve closing and the electric valve is realized. It is understood that the opening degree of the electric valve ranges from 0 to 100, and the opening degree is 0 when the valve body 2 completely closes the valve port of the valve port portion 3, and 100 when the valve body 2 completely opens the valve port of the valve port portion 3.

The screw 11 includes a rod body 111 and an annular flange 12, which may be integrally formed, and in particular, the annular flange 12 may be formed by protruding radially outwardly from an outer wall surface of the rod body 111; at least part of the annular flange 12 may be located between the bearing 41 and the spool 2. As described in the background art section, in the conventional solution, the screw rod 11 is axially abutted with the valve core 2 through the annular flange 12 to define the maximum valve opening position of the valve core 2; in this solution, a large axial contact area exists between the annular flange 12 and the valve core 2, so that when the valve core 2 is started in a reverse direction, a large friction moment needs to be overcome, and the risk of locked-up due to insufficient driving force is easy to occur.

In contrast, in the embodiment of the present utility model, the annular flange 12 is configured with the first limiting portion 122, the valve core 2 is configured with the second limiting portion 221, and when the valve core 2 is at the maximum valve opening position, the first limiting portion 122 and the second limiting portion 221 are abutted along the circumferential direction of the screw rod 11 so as to replace axial contact by circumferential contact, thereby reducing or eliminating friction torque between the annular flange 12 and the valve core 2, and being beneficial to improving the smoothness of starting of the valve core 2.

Here, the embodiment of the present utility model is not limited to the specific structural forms of the first limiting portion 122 and the second limiting portion 221, and in practical application, those skilled in the art may perform configuration according to specific needs, so long as the requirements of use can be satisfied.

In some embodiments, as shown in fig. 2-4, the side of the annular flange 12 facing the spool 2 may be provided with a limit groove 121, the limit groove 121 having a circumferential groove wall 121a, which circumferential groove wall 121a may form at least part of the first limit portion 122; the second limiting portion 221 may be a protrusion provided on the valve body 2. During the movement of the valve element 2 toward the maximum valve opening position, the second limiting portion 221 may gradually turn into the limiting groove 121, and form a circumferential stop with the circumferential groove wall 121a, so that the valve element 2 may be limited to the maximum valve opening position. With this arrangement, the annular flange 12 can be relatively lightweight by the grooved design of the annular flange 12.

The limiting groove 121 may further have a radial groove wall 121b, and the second limiting portion 221 and the radial groove wall 121b may be disposed at a gap when the second limiting portion 221 is rotated into the limiting groove 121. In this way, in the process of rotating the second limiting part 221 into or out of the limiting groove 121, rotation interference between the second limiting part 221 and the radial groove wall 121b is avoided, and problems such as rotation clamping stagnation, increase in rotation resistance or abnormal rotation noise can be avoided, so that smoothness in the valve opening and closing processes of the valve core 2 can be improved.

The limiting groove 121 may further have an axial groove bottom wall 121c, and when the valve core 2 is at the maximum valve opening position, the second limiting portion 221 and the axial groove bottom wall 121c may be disposed in a gap, so as to avoid the second limiting portion 221 and the axial groove bottom wall 121c from generating axial contact, and further avoid the generation of a larger circumferential friction moment, which is beneficial to ensuring smooth starting of the valve core 2.

When the valve core 2 is at the maximum valve opening position, the second limiting part 221 can be completely positioned in the limiting groove 121, so that the axial dimension of the screw rod 11 can be reduced, and the miniaturization design of the electric valve is facilitated. Of course, when the valve element 2 is at the maximum valve opening position, the second stopper 221 may be partially located in the stopper groove 121, which is also possible.

In practical application, the number of the first limiting parts 122 and the second limiting parts 221 can be multiple, each first limiting part 122 can be distributed at equal intervals along the circumferential direction of the annular flange 12, each second limiting part 221 can be distributed at equal intervals along the circumferential direction of the valve core 2, and each first limiting part 122 and each second limiting part 221 can be in one-to-one corresponding abutting fit, so that the stress of the valve core 2 and the annular flange 12 can be more uniform, and the deformation of the valve core 2 and the annular flange 12 in the use process can be reduced. Of course, a solution is also possible in which the number of the first limiting portions 122 and the second limiting portions 221 is one.

Assuming that the pitch of the threads provided by the screw rod 11 and the valve core 2 is P, the number of the first limiting parts 122 and the second limiting parts 221 is n, the depth of the limiting groove 121 is t, and t is more than or equal to P/n in specific processing, so that the second limiting parts 221 and the axial groove bottom wall 121c can be basically prevented from being contacted along the axial direction.

In some alternative embodiments, as shown in fig. 5, the valve core 2 may include a metal core 21 and a plastic nut 22, and the metal core 21 and the plastic nut 22 may be fixedly connected or limitedly connected so as to ensure the relative positions of the two. The plastic nut portion 22 may be screw-engaged with the screw 11, and the second stopper 221 may be formed at the plastic nut portion 22. Compared with the scheme that the second limiting part 221 is directly abutted with the metal core part 21, the scheme that the second limiting part 221 is abutted with the plastic nut part 22 is more beneficial to reducing friction force between the second limiting part 221 and the first limiting part 122, reducing friction loss and ensuring smooth starting of the valve core 2.

It should be understood that, instead of providing the limit groove 121 on the limit flange 12, a limit groove 121 may be provided on a side of the valve core 2 facing the annular flange 12, the limit groove 121 also has a circumferential groove wall 121a, the circumferential groove wall 121a may form at least part of the second limit portion 221, and the first limit portion 122 may be a protrusion provided on the annular flange 12; alternatively, the first stopper 122 may be a protrusion provided on the annular flange 12 and the second stopper 221 may be a protrusion provided on the valve element 2, as shown in fig. 6.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims

1. The utility model provides an electric valve, its characterized in that includes rotating assembly (1) and case (2), rotating assembly (1) includes lead screw (11), lead screw (11) with case (2) screw thread fit, lead screw (11) are configured with body of rod (111) and annular flange (12), along the radial of lead screw (11), annular flange (12) are relative body of rod (111) are protruding, annular flange (12) are configured with first spacing portion (122), case (2) are configured with second spacing portion (221), at least one of first spacing portion (122) and second spacing portion (221) is protruding structure, when case (2) are in the biggest open valve position, along the circumference of lead screw (11), first spacing portion (122) with second spacing portion (221) butt.

2. The electric valve according to claim 1, characterized in that a limit groove (121) is provided on a side of the annular flange (12) facing the valve element (2), the limit groove (121) has a circumferential groove wall (121 a), the circumferential groove wall (121 a) forms at least part of the first limit portion (122), the second limit portion (221) is a protrusion provided on the valve element (2), and at least part of the second limit portion (221) is located in the limit groove (121) when the valve element (2) is in a maximum valve opening position.

3. The electrically operated valve according to claim 2, characterized in that the limit groove (121) is arranged extending in the circumferential direction of the annular flange (12), the limit groove (121) further having a radial groove wall (121 b), the second limit portion (221) being arranged in a gap with the radial groove wall (121 b) when the second limit portion (221) is located in the limit groove (121).

4. A valve according to claim 2 or 3, wherein the limit groove (121) has an axial groove bottom wall (121 c), and the second limit portion (221) is disposed in a gap with the axial groove bottom wall (121 c) in the axial direction of the lead screw (11) when the spool (2) is in the maximum valve-opening position.

5. The electrically operated valve according to claim 1, characterized in that the first stopper portion (122) is located at an end of the annular flange (12) facing the spool (2), the first stopper portion (122) is protruding toward the spool (2) with respect to the annular flange (12), the second stopper portion (221) is located at an end of the spool (2) facing the annular flange (12), and the second stopper portion (221) is protruding toward the annular flange (12) with respect to the spool (2).

6. The electric valve according to claim 1, characterized in that a limit groove (121) is provided on a side of the valve element (2) facing the annular flange (12), the limit groove (121) has a circumferential groove wall (121 a), the circumferential groove wall (121 a) forms at least part of the second limit portion (221), the first limit portion (122) is a protrusion provided on the annular flange (12), and at least part of the first limit portion (122) is located in the limit groove (121) when the valve element (2) is in a maximum valve opening position.

7. The electric valve according to any one of claims 1 to 6, wherein the number of the first stopper portions (122) is plural, each of the first stopper portions (122) is equally spaced apart along the circumferential direction of the annular flange (12), and the number of the second stopper portions (221) is plural, each of the second stopper portions (221) is equally spaced apart along the circumferential direction of the spool (2).

8. The electric valve according to any one of claims 1 to 6, characterized in that the valve spool (2) includes a metal core portion (21) and a plastic nut portion (22), the metal core portion (21) and the plastic nut portion (22) are fixedly connected or limitedly connected, the plastic nut portion (22) and the screw rod (11) are screw-fitted, and at least part of the second limitation portion (221) is formed in the plastic nut portion (22).

9. The electric valve according to claim 8, characterized in that the rotating assembly (1) comprises a rotor (13), the rotor (13) is in driving connection with a screw (11), the electric valve further comprises a bearing (41), a valve port part (3) and a valve seat (4), the valve seat (4) is provided with a mounting hole section (42), at least part of the bearing (41) is positioned at the mounting hole section (42), the bearing comprises an inner ring (411) and an outer ring (422), the inner ring (411) can rotate relative to the outer ring (412), the outer ring (412) is fixedly connected or in limiting connection with at least part of a wall forming the mounting hole section (42), part of the screw (11) is positioned at a hole of the inner ring (411), at least part 411 of the annular flange (12) is positioned between the bearing (41) and the valve core (2), the annular flange (12) is abutted against the inner ring (411) along the axial direction of the bearing (41), the screw (11) comprises a limiting part (112) is positioned between the annular flange (12) and the valve core (2) in the axial direction, the valve core (2) is in limit connection with the valve seat (4) in the circumferential direction, and the metal core (21) can adjust the opening of the valve port part (3).