CN219282462U - Electric valve - Google Patents

Abstract

The electric valve comprises a rotating assembly, a valve core, a valve seat and a bearing, wherein the bearing comprises an inner ring and an outer ring, the inner ring can slide relative to the outer ring, the valve seat is provided with a mounting hole section, at least part of the bearing is positioned in the mounting hole section, the outer ring is fixedly or limitedly connected with at least part of the wall forming the mounting hole section, the rotating assembly comprises a screw rod, the screw rod is in threaded connection with the valve core, and part of the screw rod is positioned in a hole of the inner ring; the electric valve comprises a stop part, wherein the stop part and the valve seat are arranged in a split mode, at least part of the stop part is positioned between the valve core and the outer ring, and when the valve core is positioned at the maximum valve opening position, the stop part and the valve core are propped against each other along the axial direction. By adopting the scheme, the stop part is arranged between the valve core and the outer ring, and when the valve core is positioned at the maximum valve opening position, the valve core is particularly in axial abutting connection with the stop part, so that the direct contact between the valve core and the bearing can be avoided, the bearing can be protected, and the service life of the bearing and the service life of the electric valve provided by the utility model can be prolonged.

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 valve seat, a screw rod and a valve core, wherein the valve seat is provided with a bearing, the bearing comprises an inner ring and an outer ring, the screw rod is assembled on the inner ring, the valve core is in threaded connection with the screw rod, the screw rod can rotate to drive the valve core to linearly displace along the axial direction, when the valve core moves to a maximum valve opening position, the valve core and the outer ring of the bearing collide, the outer ring directly bears the axial collision force from the valve core, and the bearing is easy to damage under the condition of long-term use.

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 utility model aims to provide an electric valve which can protect a bearing.

In order to solve the technical problems, the utility model provides an electric valve, which comprises a rotating assembly, a valve core, a valve seat and a bearing, wherein the bearing comprises an inner ring and an outer ring, the inner ring can rotate relative to the outer ring, the valve seat is provided with a mounting hole section, at least part of the bearing is positioned in the mounting hole section, and the outer ring is fixedly connected or in limiting connection with at least part of a wall forming the mounting hole section; the rotating assembly comprises a screw rod, the screw rod is in threaded connection with the valve core, and part of the screw rod is positioned in the hole of the inner ring;

the electric valve comprises a stop part, the stop part and the valve seat are arranged in a split mode, at least part of the stop part is located between the valve core and the outer ring, and when the valve core is located at the maximum valve opening position, the stop part and the valve core are abutted in the axial direction.

By adopting the scheme, the electric valve comprises the stop part, the valve seat, the valve core and the bearing, wherein the stop part and the valve seat are arranged in a split way, at least part of the stop part is positioned between the valve core and the outer ring of the bearing, and when the valve core is positioned at the maximum valve opening position, the valve core is particularly in axial abutting connection with the stop part so as to avoid direct impact contact between the valve core and the bearing, thereby being beneficial to protecting the bearing and further being capable of improving the service life of the bearing.

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 screw, valve seat, valve core, bearing and stop of FIG. 1;

FIG. 3 is a schematic view of the stop member of FIG. 2;

FIG. 4 is a diagram showing the connection structure of a screw, a valve seat, a valve core, a bearing and a stopper in another embodiment of the electric valve according to the present utility model;

fig. 5 is a structural view of the stopper member mounted in the valve seat.

The reference numerals are explained as follows:

1, a rotating assembly and a 11 screw rod;

2 a valve core, 21 a metal core part and 22 a plastic nut part;

3 valve seat, 31 bearing, 311 inner ring, 312 outer ring, 32 mounting hole section, 33 guide slot;

4 a valve opening part;

5 stop member, 51 body portion, 52 stop.

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 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. Wherein, "fixedly connected" means that the relative positional relationship is unchanged after being connected with each other. "slidingly coupled" means coupled to each other and capable of sliding relative to each other after being coupled.

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.

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 to 5, fig. 1 is a schematic structural diagram of an embodiment of an electric valve according to the present utility model, fig. 2 is a structural diagram of a connection structure of a screw, a valve seat, a valve core, a bearing and a stop member in fig. 1, fig. 3 is a schematic structural diagram of a stop member in fig. 2, fig. 4 is a structural diagram of a connection structure of a screw, a valve seat, a valve core, a bearing and a stop member in another embodiment of an electric valve according to the present utility model, and fig. 5 is a structural diagram of an installation structure of a stop member in a valve seat.

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

The valve seat 3 is located on one axial side of the valve opening 4, and the valve seat 3 may be located on an upper side of the valve opening 4 in the positional relationship and orientation of fig. 1. Referring to fig. 2, the valve seat 3 is further provided with a bearing 31, the bearing 31 including an inner ring 311 and an outer ring 312, the inner ring 311 and the outer ring 312 being rotatable relative to each other. The valve seat 3 may also be provided with a mounting hole section 32, and at least part of the bearing 3 may be located in the mounting hole section 32. The outer ring 312 can be fixedly connected to at least part of the wall of the valve seat 3 for forming the mounting hole section 32 in an interference fit manner so as to limit the relative position between the outer ring 312 and the valve seat 3, and the mounting manner has a simple structure and high fixing reliability; in addition, the outer ring 312 and the valve seat 3 may be fixedly connected by welding, bonding, or the like, or the outer ring 312 and the valve seat 3 may be limitedly connected by riveting, clamping, or the like, so long as the relative position of the outer ring 312 and the valve seat 3 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 3, and a part of the screw 11 may be located in a hole of the inner ring 411. 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 3 and another portion of the valve spool 2 may be located within the valve port portion 4.

And, there may be a limit fit in the circumferential direction between the valve element 2 and the valve seat 3, so that the valve element 2 cannot perform circumferential rotation with respect to the valve seat 3. 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 3, and a guide block may be provided in the other of the valve core 2 and the valve seat 3, and the guide block may be inserted into the guide groove and may slide along the guide groove, and by the cooperation of the guide block and the guide groove, the limit cooperation of the valve core 2 and the valve seat 3 in the circumferential direction may be realized. 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 3 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 3, 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.

As described in the background art, in the conventional scheme, the electric valve is defined by the outer ring 312 of the bearing 31 to define the maximum opening position of the valve core 2, so that the outer ring 312 directly receives the axial impact force and the circumferential rotation friction force from the valve core 2, and the bearing 31 is easily damaged during long-term use.

In view of this, in the embodiment of the present utility model, the electric valve may further include a stop member 5, where the stop member 5 and the valve seat 3 are separately disposed, so as to facilitate material selection and processing configuration of the stop member 5, and in specific practice, the stop member 5 and the valve body 3 may be made of different materials, respectively; the stopper member 5 is provided between the valve element 2 and the outer ring 312, and the stopper member 5 and the valve element 2 can abut against each other in the axial direction when the valve element 2 is in the maximum valve-opening position. In this way, the direct contact between the valve core 2 and the bearing 31 can be avoided, the bearing 31 can be protected, the service life of the bearing 31 can be further prolonged, and the service life of the electric valve provided by the utility model can be prolonged.

In some embodiments, at least part of the stop member 5 may be located in the mounting hole section 32, the stop member 5 being located at the outer periphery of the screw 11, and the two being arranged with a gap to avoid rotational sliding friction between the screw 11 and the stop member 5; the stop member 5 and at least part of the wall forming the mounting hole section 32 may be fixedly connected, for example by interference fit, welding, adhesive bonding or the like; alternatively, the stopper member 5 and at least part of the wall for forming the mounting hole section 32 may be in a limited connection in the axial direction, and for example, caulking, engagement, or the like may be employed as long as the relative positions of the stopper member 5 and the valve seat 3 in the axial direction can be maintained unchanged.

In this embodiment, the stopper member 5 may axially abut against the outer ring 312, and thus, may also function to define the axial installation position of the outer ring 312. Of course, since the mounting positions of the stop member 5 and the valve seat 3 in the axial direction are determined in the present embodiment, the stop member 5 and the outer ring 312 may be disposed at a gap in the axial direction, so that the force transmission of the stop member 5 to the bearing 31 can be avoided, and the service life of the bearing 31 can be prolonged to a greater extent.

In other embodiments, the stop element 5 and the valve seat 3 may also be slidingly connected in the axial direction. In this embodiment, the mounting structure of the stop member 5 can be simpler, and the stop member 5 can be directly placed in the valve seat 3 without other connecting structures.

The valve seat 3 may form an external sliding rail of the stop member 5, the screw rod 11 may form an internal sliding rail of the stop member 5, and the stop member 5 may be driven by the valve core 2 to displace along the valve seat 3 and the screw rod 11. The stop member 5 may also axially abut the outer ring 312 when the valve spool 2 is in the maximum valve-opening position, so that the axial position of the stop member 5 is defined by the outer ring 312, and then the axial position of the valve spool 2 is defined by the stop member 5.

Here, the embodiment of the present utility model is not limited to a specific structural form of the stop member 5, and in practical application, a person skilled in the art may configure the stop member according to specific needs, so long as the stop member can meet the use requirements.

In the solution of the drawing, referring to fig. 3, the stop member 5 may include a body portion 51 and a stopper portion 52, and the stopper portion 52 may be provided protruding toward the spool 2 with respect to the body portion 51. When the valve element 2 is at the maximum valve opening position, the body 51 may axially abut against the outer ring 312, and the stopper 52 may axially abut against the valve element 2.

By adopting the scheme, the contact area of the stop part 5 and the valve core 2 can be reduced, under the condition that the axial impact force generated by the valve core 2 to the stop part 5 is unchanged, the pressure intensity born by the stop part 5 can be larger, the surface, which is contacted with the stop part 52 and the valve core 2, of the stop part 52 is polished smoothly, the friction coefficient of the surface, which is contacted with the valve core 2, of the stop part 52 can be reduced, the friction moment between the stop part 5 and the valve core 2 can be reduced, the inversion of the screw rod 11 and the reverse starting of the valve core 2 are facilitated, the problems of blocking, the like can be avoided to a greater extent, and the long-term reliable stable operation of the electric valve is facilitated.

The stopper 52 may also be provided protruding toward the valve seat 3 with respect to the body portion 51, as shown in fig. 5, the valve seat 3 may be provided with a guide groove 33, and the stopper 52 may be slidably fitted in the guide groove 33 and may be slidably fitted with at least part of the wall forming the guide groove 33 for restricting the relative rotation of the stopper member 5 and the valve seat 3. It should be understood that the guide groove 33 and the guide groove for cooperation with the valve element 2 may be the same, so that the valve seat 3 may be relatively simple in construction; of course, two different configurations of the guide groove 33 and the guide groove for cooperation with the valve element 2 are also possible.

The number of the stopper portions 52 may be one. Alternatively, the number of the stop portions 52 may be greater than or equal to two, and the respective stop portions 52 may be equally spaced apart in the circumferential direction, so that the stress between the spool 2 and the stop member 5 may be more uniform, and the possibility of the spool 2 or the stop member 5 being deformed by the stress may be reduced.

The stopper 52 and the body 51 may be integrally formed to simplify the manufacturing process. Alternatively, the stopper 52 and the body 51 may be formed as separate members, and in this case, the stopper 52 and the body 51 may be formed by selecting different materials as needed.

The stop member 5 and the valve seat 3 can be in a radial clearance fit, so that the contact area between the stop member 5 and the valve seat 3 can be relatively small and the friction loss can be relatively small when the stop member 5 is axially displaced.

In some alternative embodiments, the stop member 5 may be made of plastic or wear-resistant metal, so that friction between the stop member 5 and the valve core 2 can be reduced, and further friction loss can be reduced, and meanwhile, reverse starting of the valve core 2 is facilitated, and risk of locked rotor can be avoided to a greater extent. Also, the hardness of the stopper member 5 may be smaller than that of the outer ring 312 to reduce abrasion to the outer ring 312 when the stopper member 5 and the outer ring 312 are in contact, and the bearing 31 may be protected to a greater extent.

In some alternative embodiments, 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 to ensure the relative positions of the two. The plastic nut 22 may be screwed with the screw 11, and the valve core 2 may specifically be in contact with the stop member 5 through the plastic nut 22. Compared with the scheme that the stop part 5 and the metal core part 21 are directly abutted, the scheme that the stop part 5 and the plastic nut part 22 are abutted is more beneficial to reducing friction force between the valve core 2 and the stop part 5, reducing friction loss and ensuring smooth starting of the valve core 2.

In specific use, the plastic nut portion 22 and the valve seat 3 are slidably connected, and form a limit connection in the circumferential direction, and the metal core portion 21 is used for being matched with the valve port portion 4 to realize valve opening, valve closing and opening adjustment.

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 (10)

1. The electric valve is characterized by comprising a rotating assembly (1), a valve core (2), a valve seat (3) and a bearing (31), wherein the bearing (31) comprises an inner ring (311) and an outer ring (312), the inner ring (311) can rotate relative to the outer ring (312), the valve seat (3) is provided with a mounting hole section (32), at least part of the bearing (31) is positioned in the mounting hole section (32), the outer ring (312) is fixedly connected or in limiting connection with at least part of a wall forming the mounting hole section (32), the rotating assembly (1) comprises a screw rod (11), the screw rod (11) is in threaded connection with the valve core (2), and part of the screw rod (11) is positioned in a hole of the inner ring (311);

the electric valve comprises a stop part (5), wherein the stop part (5) and the valve seat (3) are arranged in a split mode, at least part of the stop part (5) is positioned between the valve core (2) and the outer ring (312), and when the valve core (2) is positioned at the maximum valve opening position, the stop part (5) and the valve core (2) are abutted in the axial direction.

2. An electrically operated valve as claimed in claim 1, characterized in that at least part of the stop member (5) is located in the mounting hole section (32), the stop member (5) is located at the outer periphery of the screw (11), the stop member (5) is arranged in a clearance with the screw (11) in the radial direction of the stop member (5), and the stop member (5) is arranged in an interference fit or welded or clearance with at least part of the wall forming the mounting hole section (32).

3. An electric valve according to claim 2, characterized in that the stop member (5) and the valve seat (3) are axially slidably connected, the stop member (5) and the outer ring (312) being axially abutted when the valve body (2) is in a maximum valve-opening position.

4. A valve according to claim 3, wherein the stop member (5) comprises a body portion (51) and a stopper portion (52), the stopper portion (52) being provided protruding toward the valve body (2) with respect to the body portion (51), the body portion (51) and the outer ring (312) abutting in an axial direction when the valve body (2) is in a maximum valve-opening position, the stopper portion (52) and the valve body (2) abutting in an axial direction.

5. An electric valve according to claim 4, characterized in that the stopper portion (52) is provided protruding toward the valve seat (3) with respect to the body portion (51) in a radial direction of the stopper member (5), the valve seat (3) is provided with a guide groove (33), the guide groove (33) is provided extending in an axial direction of the valve seat (3), at least part of the stopper portion (52) is located in the guide groove (33), and the stopper portion (52) is slidably fitted with at least part of a wall forming the guide groove (33) in the axial direction of the valve seat (3).

6. The electric valve according to claim 4, wherein the body portion (51) and the stopper portions (52) are integrally structured, the number of the stopper portions (52) is two or more, and the stopper portions (52) are equally spaced apart in the circumferential direction of the stopper member (5).

7. The electric valve according to claim 5, wherein the body portion (51) and the stopper portions (52) are integrally structured, the number of the stopper portions (52) is two or more, and the stopper portions (52) are equally spaced apart in the circumferential direction of the stopper member (5).

8. The electric valve according to any one of claims 1 to 7, characterized in that the stop member (5) is of plastic material or of wear-resistant metal material, the hardness of the stop member (5) being smaller than the hardness of the outer ring (312).

9. The electric valve according to any one of claims 1-7, characterized in that the valve core (2) comprises a metal core part (21) and a plastic nut part (22), the metal core part (21) and the plastic nut part (22) being fixedly connected or limitedly connected, the plastic nut part (22) and the screw rod (11) being screwed, the stop member (5) and the plastic nut part (22) being axially offset when the valve core (2) is in a maximum valve-opening position.

10. The electric valve according to claim 9, characterized in that the electric valve comprises a valve port portion (4), the plastic nut portion (22) is axially slidably connected with the valve seat (3), the plastic nut portion (22) and the valve seat (3) are circumferentially limited and connected, and the metal core portion (21) can adjust the opening degree of a valve port of the valve port portion (4).

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