CN219388654U - Electric valve - Google Patents

Abstract

The utility model discloses an electric valve, which comprises a rotor component and a valve core, wherein the rotor component 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 an annular surface facing the valve core in the axial direction, one of the annular flange and the valve core is provided with an abutting surface, the other of the annular flange and the valve core can be in contact with the abutting surface, and the area of the abutting surface is smaller than that of the annular surface. The contact between the abutting surface and the valve core can form a relatively small contact area, and under the condition of the same axial force, the circumferential friction moment which needs to be overcome for the reverse starting of the valve core can be reduced, so that the smooth starting of the valve core is facilitated; because the contact area is smaller, the pressure intensity of the abutting surface can be increased, the abutting surface is easy to be grinded smooth in the process of contacting the abutting surface with the valve core, the friction coefficient of the abutting surface can be reduced, and the friction moment between the abutting surface and the valve core can be reduced.

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 motor-driven valve comprises a rotor assembly and a valve core, wherein the rotor assembly comprises a screw rod, the valve core and the screw rod are in threaded fit and used for axially displacing under the drive of the screw rod, the screw rod is provided with an annular flange, the annular flange 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 friction moment to be overcome is large, and the risk of locked rotor 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 utility model aims to provide an electric valve which can be conveniently reversely started.

In order to solve the technical problems, the utility model provides an electric valve, which comprises a rotor assembly, a valve core and a bearing, wherein the rotor assembly comprises a screw rod, the screw rod is in threaded fit with the valve core, the screw rod comprises a rod body and an annular flange, the annular flange is arranged in a protruding way relative to the rod body along the radial direction of the screw rod, at least part of the annular flange is positioned between the bearing and the valve core, the annular flange is provided with an annular surface facing the valve core in the axial direction, one of the screw rod and the valve core is provided with an abutting surface, and the other of the screw rod and the valve core can be in contact with the abutting surface; the abutment surface is smaller in area than the annulus, or the annulus comprises the abutment surface.

The screw rod is provided with a rod body and an annular flange, the annular flange is arranged in a protruding mode relative to the rod body along the radial direction of the screw rod, the annular flange is provided with an annular surface facing the valve core in the axial direction, one of the screw rod and the valve core is provided with an abutting surface, the other of the screw rod and the valve core can be in contact with the abutting surface, the area of the abutting surface is smaller than that of the annular surface through the arrangement, the contact between the abutting surface and the valve core or the annular flange is facilitated to form a relatively small contact area, and under the condition of the same axial force, the reduction of the circumferential friction moment which needs to be overcome by the reverse starting of the valve core is facilitated, and the smooth starting of the valve core is facilitated.

The utility model also provides an electric valve, which comprises a rotor assembly, a valve core and a bearing, wherein the rotor assembly comprises a screw rod, the screw rod is in threaded fit with the valve core, the screw rod is provided with a rod body and an annular flange, the annular flange is arranged in a protruding mode relative to the rod body along the radial direction of the screw rod, at least part of the annular flange is positioned between the bearing and the valve core, the annular flange is abutted against the bearing along the axial direction, the outer diameter of the annular flange is gradually reduced along the direction of approaching the valve core along the axial direction, the annular flange is provided with an abutting surface a facing the valve core along the axial direction, and the abutting surface a can be contacted with the valve core.

The screw rod is provided with a rod body and an annular flange, the annular flange is arranged along the radial direction of the screw rod in a protruding mode relative to the rod body, the annular flange is provided with an abutting surface facing the valve core in the axial direction, the abutting surface can be in contact with the valve core, the annular flange is axially along the direction close to the valve core, the outer diameter of the annular flange is gradually reduced, the area of the abutting surface can be effectively reduced through the tapered design of the annular flange, and then the circumferential friction moment between the abutting surface and the valve core can be reduced, and the smooth starting of the valve core is facilitated.

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 connecting structure diagram of the screw rod, the valve core and the valve seat in FIG. 1;

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

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

FIG. 5 is a diagram showing the connection structure of a screw and a valve core in another embodiment of the electric valve according to the present utility model;

fig. 6 is a partial cross-sectional view of a screw in yet another embodiment of an electrically operated valve provided by the present utility model.

The reference numerals are explained as follows:

1 rotor assembly, 11 screw rods, 111 rod bodies, 12 annular flanges, 121 annular surfaces, 122 outer wall surfaces,

13 contact part, 13a contact surface, 131 circumferential annular plate, 131a inner wall surface, 132 axial end plate, 133 contact plate;

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

3, a valve opening part;

4 valve seat, 41 bearing, 411 inner ring, 412 outer ring, 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 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.

Example 1

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

As shown in fig. 1, the present utility model provides an electric valve including a rotor assembly 1, a valve body 2, a valve opening 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 rotor assembly 1 comprises a screw 11, a part of which screw 11 may be located in the valve seat 4 and a part of which 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 4 and another portion of the valve spool 2 may be located within the valve port portion 3.

And, there is spacing cooperation in the circumference between case 2 and the disk seat 4 for case 2 can not carry out circumferential rotation relative to disk seat 4. In some embodiments, a limiting groove extending along the axial direction may be formed in one of the valve core 2 and the valve seat 4, a limiting block may be formed in the other one of the valve core 2 and the valve seat 4, the limiting block may be inserted into the limiting groove and may slide along the limiting groove, and limit fit of the valve core 2 and the valve seat 4 in the circumferential direction may be achieved through fit of the limiting block and the limiting 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 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 rotor 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 rotor 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 rotor 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.

Referring to fig. 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; the annular flange 12 has an annular face 121 facing axially towards the spool 2. In conventional solutions, the screw 11 is in axial contact with the valve core 2 through the annulus 121 to define the maximum open valve position of the valve core 2. However, the contact area is large, so that the friction moment which needs to be overcome when the valve core 2 is reversely started is relatively large, and the problem of locked rotation caused by insufficient driving force is easy to occur.

In contrast, in the embodiment of the present utility model, the annular flange 12 is further provided with an abutment portion 13, and the abutment portion 13 has an abutment surface 13a, and the abutment portion 13 can be brought into contact with the valve element 2 via the abutment surface 13a to define the maximum open valve position of the valve element 2. The area of the abutment surface 13a is smaller than the annular surface 121. Compared with the contact between the annular surface 121 and the valve core 2, the contact between the abutting surface 13a and the valve core 2 can form a relatively small contact area, and under the condition of the same axial force, the circumferential friction moment which needs to be overcome for the reverse starting of the valve core 2 can be reduced, so that the smooth starting of the valve core 2 is facilitated. In addition, because the contact area is smaller, the pressure intensity of the abutting surface 13a is increased, the abutting surface 13a is easy to be abraded and smooth in the process of contacting the abutting surface 13a with the valve core 2, the friction coefficient of the abutting surface 13a can be reduced, and further the friction moment between the abutting surface 13a and the valve core 2 can be reduced, so that the smoothness of starting of the valve core 2 can be improved.

Here, the embodiment of the present utility model is not limited to the specific configuration of the abutment portion 13, and in practical application, those skilled in the art may perform configuration according to specific needs, as long as the requirements of use can be satisfied.

In some embodiments, the abutment 13 and the annular flange 12 may be of unitary construction in order to simplify the manufacturing process of the abutment 13.

Specifically, as shown in fig. 2 and 3, the abutment portion 13 may be a protrusion disposed on the annular surface 121. The number of projections may be one, and at this time, the number of projections is relatively small, and the structure of the abutment portion 13 may be relatively simple. Or, the number of the protrusions can be also multiple, and the protrusions can be distributed at equal intervals along the circumferential direction, so that when the protrusions are in contact with the valve core 2, the stress of the valve core 2 is more uniform, and the possibility of deformation of the valve core 2 is relatively low.

In addition, the contact portion 13 may be provided radially outward of the annular flange 12, as long as it can be brought into contact with the valve element 2.

In other embodiments, the abutment 13 and the annular flange 12 may be in a split structure, i.e. the abutment 13 and the annular flange 12 may be formed separately and then connected, at least part of the abutment 13 is located on the outer shaft of the annular flange 12, and the abutment 13 and the annular flange 12 may be fixedly connected or limitedly connected to ensure the relative positions of the abutment 13 and the annular flange 12. The scheme of fixing connection can specifically comprise welding, bonding, interference fit and the like. The scheme of limiting connection can specifically comprise clamping connection, riveting and the like.

By adopting the split design scheme, the abutting part 13 and the annular flange 12 can be conveniently prepared from different materials respectively, so that the use requirements of the abutting part and the annular flange can be better met. The abutment 13 may be made of plastic or wear-resistant metal material, for example.

As shown in fig. 4, in one aspect, the abutment portion 13 may include a circumferential ring plate 131, the circumferential ring plate 131 having an inner wall surface 131a, the annular flange 12 may have an outer wall surface 122, and the inner wall surface 131a and the outer wall surface 122 may be assembled. The specific assembly may be an interference fit, a welded fit, etc. to fix the relative positions of the abutment 13 and the annular flange 12. After the assembly, the annular flange 12 and the circumferential ring plate 131 may both axially abut against the inner ring 411, so that the mounting position of the inner ring 411 may be defined.

The abutment portion 13 may further include an abutment plate 133, where the abutment plate 133 may be mounted on a side of the circumferential ring plate 131 facing the valve core 2, that is, the abutment plate 133 protrudes toward the valve core 2 relative to the circumferential ring plate 131, and the abutment surface 13a may specifically be a surface of the abutment plate 133 facing the valve core 2, and the abutment portion 13 may be in contact with the valve core 2 through the abutment plate 133.

As shown in fig. 5, in another aspect, the abutment portion 13 may include a circumferential ring plate 131 and an axial end plate 132, the axial end plate 132 may be located on a side of the annular flange 12 facing away from the valve core 2, and the axial end plate 132 and the annular flange 12 may abut against each other in an axial direction, the circumferential ring plate 131 may have an inner wall surface 131a, the annular flange 12 may have an outer wall surface 122, and the inner wall surface 131a and the outer wall surface 122 may be assembled by interference fit or welding. After assembly, axial end plate 132 may axially abut inner ring 411 and may also be used to define the mounting location of inner ring 411.

The abutment portion 13 may further include an abutment plate 133, and the abutment plate 133 may be mounted on a side of the circumferential ring plate 131 facing the valve element 2, and the abutment surface 13a may specifically be a surface of the abutment plate 133 facing the valve element 2.

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 portion 22 may be screwed with the screw 11, and the abutment portion 13 may specifically abut against the plastic nut portion 22 in the axial direction. Compared with the scheme that the abutting part 13 is directly abutted against the metal core part 21, the scheme that the abutting part 13 is abutted against the plastic nut part 22 is more beneficial to reducing friction moment between the abutting part 13 and the valve core 2, so that the smoothness of starting of the valve core 2 can be improved.

It should be understood that the abutment portion 13 may be disposed not only on the annular flange 12 but also on the valve element 2, as long as the area of the abutment surface 13a is ensured to be smaller than the annular surface 121.

Example two

Referring to fig. 6, fig. 6 is a partial cross-sectional view of a screw in still another embodiment of the electric valve according to the present utility model.

The core difference between this embodiment and the first embodiment is that the area of the annulus 121 is changed by adjusting the structural form of the annular flange 12 of the screw 11.

As shown in fig. 6, in the present embodiment, the outer diameter of the annular flange 12 may be gradually reduced in the direction approaching the spool 2 in the axial direction to effectively reduce the area of the annulus 121, so that the circumferential friction torque between the annulus 121 and the spool 2 can be reduced, and smooth start-up of the spool 2 is facilitated. In this embodiment, the annular surface 121 is the contact surface 13a.

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. An electric valve characterized by comprising a rotor assembly (1), a valve core (2) and a bearing (41), wherein the rotor assembly (1) comprises a screw rod (11), the screw rod (11) is in threaded fit with the valve core (2), the screw rod (11) comprises a rod body (111) and an annular flange (12), the annular flange (12) is arranged in a protruding manner relative to the rod body (111) along the radial direction of the screw rod (11), at least part of the annular flange (12) is positioned between the bearing (41) and the valve core (2), the annular flange (12) is provided with an annular surface (121) facing the valve core (2) in the axial direction, one of the screw rod (11) and the valve core (2) is provided with an abutting surface (13 a), and the other one of the screw rod (11) and the valve core (2) can be contacted with the abutting surface (13 a); the abutment surface (13 a) is smaller in area than the annulus (121), or the annulus (121) comprises the abutment surface (13 a).

2. The electric valve according to claim 1, characterized in that it comprises a valve seat (4), said valve seat (4) having a mounting hole section (42), at least part of said bearing (41) being located in said mounting hole section (42), said bearing (41) comprising an inner ring (411) and an outer ring (412), said inner ring (411) being rotatable with respect to said outer ring (412), said outer ring (412) being fixedly or limitedly connected to at least part of the wall forming said mounting hole section (42), part of said screw (11) being located in a hole of said inner ring (411), said annular flange (12) being axially offset with said inner ring (411).

3. The electric valve according to claim 2, characterized in that the screw rod (11) includes an abutment portion (13), the abutment surface (13 a) is located at the abutment portion (13), the abutment portion (13) and the annular flange (12) are of an integral structure, the abutment portion (13) protrudes toward the valve core (2) at the annular surface (121), the number of the abutment portions (13) is plural, and the abutment portions (13) are arranged at equal intervals in the circumferential direction.

4. The electric valve according to claim 2, characterized in that the screw rod (11) comprises an abutting portion (13), the abutting surface (13 a) is located at the abutting portion (13), the abutting portion (13) and the annular flange (12) are of a split type structure, at least part of the abutting portion (13) is located at the periphery of the annular flange (12), and the abutting portion (13) and the annular flange (12) are fixedly connected or in a limiting connection.

5. The electric valve according to claim 4, characterized in that the abutment (13) comprises a circumferential ring plate (131), the circumferential ring plate (131) having an inner wall surface (131 a), the annular flange (12) having an outer wall surface (122), the inner wall surface (131 a) and the outer wall surface (122) being interference fit or welded.

6. The electric valve according to claim 4, characterized in that the abutment (13) comprises a circumferential ring plate (131) and an axial end plate (132), the axial end plate (132) being located on a side of the annular flange (12) facing away from the valve spool (2), and the axial end plate (132) and the annular flange (12) being axially abutted, the axial end plate (132) and the inner ring (411) of the bearing (41) being axially abutted, the circumferential ring plate (131) having an inner wall surface (131 a), the annular flange (12) having an outer wall surface (122), the inner wall surface (131 a) and the outer wall surface (122) being interference fit or welded.

7. The electric valve according to claim 5 or 6, characterized in that the abutment (13) comprises an abutment plate (133), the abutment plate (133) being located on a side of the circumferential ring plate (131) facing the valve spool (2), the abutment plate (133) protruding towards the valve spool (2) with respect to the circumferential ring plate (131), the abutment plate (133) having the abutment surface (13 a).

8. The utility model provides an electric valve, its characterized in that includes rotor subassembly (1), case (2) and bearing (41), rotor subassembly (1) include 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), follow the radial of lead screw (11), annular flange (12) are relative body of rod (111) arch sets up, at least part of annular flange (12) is located between bearing (41) and case (2), annular flange (12) with bearing (41) are along the axial offset, annular flange (12) are along being close to the direction of case (2), the external diameter of annular flange (12) reduces gradually, annular flange (12) have in the axial orientation case (2) butt face (13 a), butt face (13 a) can with case (2) contact.

9. The electric valve according to any one of claims 1-6, 8, characterized in that the valve spool (2) comprises a metal core part (21) and a plastic nut part (22), the metal core part (21) being fixedly connected or limitedly connected with the plastic nut part (22), the plastic nut part (22) and the screw rod (11) being screw-fitted, one of the annular flange (12) and the plastic nut part (22) having an abutment surface (13 a), the other of the annular flange (12) and the plastic nut part (22) being contactable with the abutment surface (13 a).

10. The electric valve according to claim 9, characterized in that the electric valve comprises a valve opening (3) and a valve seat (4), the valve core (2) is axially and slidably connected with the valve seat (4), the valve core (2) and the valve seat (4) are in circumferential limit connection, and the metal core (21) can be close to or far away from the valve opening (3) so as to adjust the opening of a valve port of the valve opening (3).