CN113324062A

CN113324062A - Electric valve

Info

Publication number: CN113324062A
Application number: CN202010129405.0A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Climate and Appliance Controls Group Co Ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2021-08-31
Also published as: WO2021169037A1

Abstract

The invention discloses an electric valve, which comprises a valve body, a rotor part, a transmission plate and a gear reduction mechanism, wherein the rotor part comprises a rotor shaft, the transmission plate is fixedly connected to the transmission end part of the rotor shaft, and the rotor shaft drives an input gear of the gear reduction mechanism to rotate through the transmission plate; the electric valve further comprises an elastic body, and the transmission plate is in elastic contact with the input gear through the elastic body so as to realize power transmission; compared with the prior art in which the transmission plate and the input gear directly collide to transmit power, the transmission plate and the input gear elastically contact through the elastomer to transmit the power, so that the transmission noise is greatly reduced, the transmission noise pollution of the electric valve is reduced, the electric valve is favorable for being applied to an environment with harsh requirements on noise, and the use flexibility of the electric ball valve is improved.

Description

Electric valve

Technical Field

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

Background

Electrically operated valves are used in fluid control systems to control the make-and-break or flow of fluid.

When the valve works, the coil of the electric valve is electrified to drive the rotor to rotate, the rotor drives the reduction gear mechanism and amplifies output torque, and the valve rod is driven to rotate so as to drive the valve core to act, so that the valve core is opened, closed or the flow is regulated.

When the rotor shaft of the electric valve rotates, the transmission part is driven to rotate, and the transmission part drives the sun wheel to rotate; generally, the motor of the electric valve adopts a stepping motor structure, and the rotor intermittently rotates, so that when the electric valve works, intermittent impact is generated between a transmission part and a sun gear, and the electric valve generates noise in the operation process.

Therefore, how to reduce the noise generated during the operation of the electric valve in the background art is a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

The invention provides an electric valve which comprises a valve body, a rotor part, a transmission plate and a gear reduction mechanism, wherein the rotor part comprises a rotor shaft, the transmission plate is fixedly connected to the transmission end part of the rotor shaft, the rotor shaft can drive the transmission plate to rotate, one of the transmission plate and an input gear of the gear reduction mechanism is provided with a groove, the other one of the transmission plate and the input gear is provided with a plate body inserted into the groove, the transmission plate drives the input gear to rotate through the matching of the plate body and the groove, the electric valve further comprises an elastic body, and the elastic body is at least arranged on the abutting contact surface of one of the plate body and the groove.

Compared with the prior art in which the transmission part directly collides with the input gear to transmit power, one of the transmission plate and the input gear is provided with a groove, the other one is provided with a plate body inserted into the groove, the transmission plate drives the input gear to rotate through the matching of the plate body and the groove, the electric valve further comprises an elastic body, and the elastic body is at least arranged on the abutting contact surface of one of the plate body and the groove, so that the noise of the electric valve during working is reduced.

Drawings

FIG. 1 is a schematic diagram of an electrically operated valve according to an embodiment of the present invention;

FIG. 2 is an assembled view of the rotor shaft, the drive plate, the elastomer and the input gear of FIG. 1;

FIG. 3 is a schematic view of the assembly of the drive plate and the elastomer of FIG. 1;

FIG. 4 is a schematic view of a driving plate according to an embodiment of the present invention.

Wherein, in fig. 1 to 4:

10-a valve seat; 11 a-external connection; 12 a-external connection;

20-a rotor component; 21-a rotor shaft; 22-a drive plate; 22 a-a receiving portion; 22 b-a fixation hole; 221-a base portion; 222-a plate body portion; 23-an elastomer;

31-input gear; 311-large diameter part; 312-small diameter part; 31 a-a groove; 31a 1-groove wall portion; 31a 2-bottom wall; 31 b-mounting holes; 32-gear ring; 321-a top wall; 322-peripheral wall.

Detailed Description

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

Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of an electric valve according to an embodiment of the present invention; FIG. 2 is an assembled view of the rotor shaft, the drive plate, the elastomer and the input gear of FIG. 1; FIG. 3 is a schematic view of the assembly of the drive plate and the elastomer of FIG. 1; FIG. 4 is a schematic view of a driving plate according to an embodiment of the present invention.

The invention provides an electric valve, which comprises a valve body part and a coil, wherein the valve body part is mainly used for flow regulation, and the coil part provides driving force.

The electric valve of the present invention comprises a valve body, a valve seat, a coil, a rotor part 20, a transmission plate 22 and a gear reduction mechanism. The valve seat 10 is provided with a first port and a second port, the valve core is arranged in the valve seat 10, the first port and the second port are communicated through a through hole of the valve core, the first port and the second port are generally used for installing an external connecting pipe, as shown in fig. 1, the first port is provided with an external connecting pipe 11a, and the second port is provided with an external connecting pipe 12 a. The first port can be a refrigerant inlet or a refrigerant outlet, and correspondingly, when the first port is the refrigerant inlet, the second port is the refrigerant outlet; when the first port is a refrigerant outlet, the second port is a refrigerant inlet.

The external refrigerant flows into the valve seat 10 from the external connection pipe of the first port (or the second port), passes through the valve core, and flows out from the external connection pipe of the second port (or the first port).

The rotor part 20 includes a rotor shaft 21, the transmission plate 22 is fixedly connected to the transmission end of the rotor shaft 21, and the rotor shaft 21 drives the input gear 31 of the gear reduction mechanism to rotate through the transmission plate 22. Wherein the gear speed reducing mechanism mainly functions to reduce the speed so as to obtain proper torque to drive the valve rod inside the valve body to rotate. The valve rod can drive the valve core to rotate so as to realize the opening and closing and flow adjusting functions of the electric valve. The form of the gear reduction mechanism can be various, and the technical scheme and the technical effect are described by taking the gear reduction mechanism as a planetary gear mechanism, and a person skilled in the art can understand that the technical scheme is also applicable to other types of gear reduction mechanisms.

The electric valve in the present invention further includes an elastic body 23, and the transmission plate 22 is elastically contacted with the input gear 31 through the elastic body 23 to realize power transmission. That is, the elastic body 23 is provided on the contact surface between the transmission plate 22 and the input gear 31, and the transmission plate 22 elastically drives the input gear 31 to rotate through the elastic body 23.

When the electric valve works, the coil is electrified to drive the rotor part to rotate, the rotor shaft 21 drives the transmission plate 22 to synchronously rotate, the transmission plate 22 is in elastic contact with the input gear 31 through the elastic body 23, further, the rotation power is transmitted to the input gear 31, the input gear 31 transmits the power to the valve rod through the transmission of all gears in the gear reduction mechanism, so that the rotation of the valve rod is realized, and the opening and closing and flow regulating functions of the electric valve are realized.

Compared with the prior art in which the transmission plate 22 directly collides with the input gear 31 to transmit power, the transmission plate 22 and the input gear 31 elastically contact through the elastic body 23 to realize power transmission, so that transmission noise is greatly reduced, transmission noise pollution of the electric valve is reduced, the electric valve is favorable for being applied to an environment with harsh requirements on noise, and the use flexibility of the electric valve is improved.

In a specific embodiment, one of the transmission plate 22 and the input gear 31 is provided with a groove, the other is provided with a plate body inserted into the groove, the transmission plate 22 drives the input gear 31 to rotate through the matching of the plate body and the groove, and the elastic body 23 is at least arranged on the abutting contact surface of one of the plate body and the groove.

That is, the transmission plate 22 may be provided with a groove, or may be provided with a plate, and accordingly, the input gear 31 is provided with a plate inserted in cooperation with the groove of the transmission plate 22, or a groove inserted in cooperation with the plate of the transmission plate 22.

The technical solution will be described by taking the case that the transmission plate 22 is provided with a plate body and the input gear 31 is provided with a groove.

Specifically, the drive plate 22 may include a base body portion 221 and a plate body portion 222 extending outward from the base body portion 221, the base body portion 221 being provided with a fixing hole 22b for fixed connection with the rotor shaft 21. The plate body 222 includes a sidewall portion, and the shape, extension length and thickness of the plate body 222 can be properly set according to the specific application environment, and the technical solution will not be understood and implemented by those skilled in the art if the above parameters are not disclosed herein.

The upper end of the input gear 31 herein is provided with a groove 31a, and the groove 31a may be opened upward, but may also be in other structural forms. The lower end of the input gear 31 is provided with a gear part, and the input gear 31 is meshed with the adjacent transmission gear through the gear part to transmit power. The plate body portion 222 extends at least partially into the recess 31a, the recess 31a includes a groove wall portion 31a1 capable of abutting against the side wall portion, and the elastic body 23 is disposed between the side wall portion and the groove wall portion 31a 1.

In the above embodiment, the upper end of the input gear 31 is provided with the groove 31a, and the lower end is provided with the gear part, which is beneficial to the overall structural layout of each part of the electric valve, so as to reduce the volume of the electric valve as much as possible and improve the application flexibility of the electric valve.

In the above embodiments, the elastic body 23 may be an annular elastic ring, and the annular elastic ring may be an O-ring or a rectangular ring, but may also be in other forms of ring structures. The lateral wall portions of plate body portion both sides all are provided with inside sunken accommodation portion 22a, and accommodation portion 22a is located in the cover of annular elastic ring, and the shape of accommodation portion 22a can be with the inner circle looks adaptation of annular elastic ring.

The annular elastic ring is positioned on the transmission plate 22, so that the positioning reliability is high, and the assembly and the maintenance are convenient.

As mentioned above, the opening of the groove 31a of the input gear 31 may be upward, and it should be noted that the direction shown in fig. 1 is used as a reference for description, and is only for achieving the simplicity of the technical solution description.

The groove 31a includes two side walls provided with a groove wall portion 31a1 and a bottom wall 31a2, the bottom wall 31a2 having a shape fitting the outer peripheral wall of the annular elastic ring. In the case of an annular elastic ring as the O-ring, the bottom wall 31a2 may be formed in an arc-shaped configuration to fit around the outer ring of the annular elastic ring. In another embodiment, the recess of the input gear 31 opens upward and includes two side walls and a bottom wall, the two side walls are provided with groove wall portions, and the corresponding position of the bottom wall 31a2 and the groove wall portion 31a1 form a cavity for positioning the mounting elastic body 23. In this embodiment the elastomer 23 is mounted to the input gear 31.

The transmission plate 22 in each of the above embodiments may include two plate portions 222, the two plate portions 222 are symmetrically disposed about the central axis of the fixing hole 22b of the base portion 221, correspondingly, the upper end of the input gear 31 is provided with two grooves for matching with the two plate portions 222, and the elastic body 23 is disposed between the side wall portion and the groove wall portion of each plate portion 222.

The driving plate 22 is provided with two plate body portions which are symmetrical, so that the stability of power transmission can be improved.

In a specific embodiment, the input gear 31 in each of the above embodiments may include a large diameter portion 311 and a small diameter portion 312, which are coaxially disposed, the large diameter portion 311 is provided with a mounting hole 31b coaxial with the rotor shaft 21, the base portion 221 of the transmission plate 22 is at least partially located inside the mounting hole 31b, and this document gives an embodiment in which the base portion 221 of the transmission plate 22 is completely located inside the mounting hole 31 b. The peripheral wall of the mounting hole 31b is formed with a groove opening upward, and the peripheral wall of the small-diameter portion 312 is provided with a gear portion.

In each of the above embodiments, the planetary gear mechanism may include a gear ring 32, a sun gear, and a planetary gear assembly, the input gear 31 is the sun gear, the gear ring 32 is fixed to the valve body, the gear ring includes a top wall 321 and a peripheral wall 322 extending downward from the top wall 321, the peripheral wall 322 encloses a cavity with a downward opening, the peripheral wall 322 is provided with an inner engagement section, and the inner engagement section of the gear ring 32 is engaged with each stage of planetary gear correspondingly.

The top wall of gear circle 32 is provided with the through-hole, and the small diameter portion 312 of sun gear passes the through-hole of top wall and stretches into inside the cavity, and the step face between large diameter portion 311 and small diameter portion 312 rotates and supports in the top wall outside of gear circle.

The number of the planet wheel assemblies can be determined according to the electric valve in practical application, and can be one, or two or more. The planet wheel subassembly includes planet carrier and two at least planet wheels, and the planet carrier mainly plays supporting role and transmission power's effect to the planet wheel, and the primary structure of planet carrier can be by multiple form, does not do specific limit here.

The above description details an electrically operated valve provided by the present invention. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The electric valve is characterized by comprising a valve body, a rotor component (20), a transmission plate (22) and a gear reduction mechanism, wherein the rotor component (20) comprises a rotor shaft (21), the transmission plate (22) is fixedly connected to a transmission end part of the rotor shaft (21), the rotor shaft (21) can drive the transmission plate (22) to rotate, one of the transmission plate (22) and an input gear (31) of the gear reduction mechanism is provided with a groove, the other one of the transmission plate and the input gear is provided with a plate body inserted into the groove, the transmission plate (22) drives the input gear (31) to rotate through the matching of the plate body and the groove, the electric valve further comprises an elastic body (23), and the elastic body (23) is at least arranged on a contact surface, abutted against one of the plate body and the groove.

2. The electric valve according to claim 1, wherein the transmission plate (22) comprises a base body portion (221) and a plate body portion (222) extending outward from the base body portion (221), the plate body portion (222) comprises a side wall portion, the input gear (31) is provided with a groove (31a) at an upper end thereof and a gear portion at a lower end thereof, the plate body portion (222) at least partially protrudes into the groove, the groove (31a) comprises a groove wall portion capable of abutting against the side wall portion, and the elastic body (23) is disposed between the side wall portion and the groove wall portion.

3. The electric valve according to claim 2, wherein the elastic body (23) is an annular elastic ring, and the side wall portions on both sides of the plate body portion (222) are provided with receiving portions (22a) which are recessed inward, and the annular elastic ring is fitted over the receiving portions (22 a).

4. The electric valve according to claim 3, characterised in that the groove (31a) of the input gear (31) opens upwards and comprises two side walls provided with said groove wall portion (31a1) and a bottom wall (31a2) correspondingly shaped to cooperate with the outer circumferential wall of the annular elastic ring.

5. The electric valve of claim 3, wherein the annular elastic ring is a rubber ring or a silicone ring.

6. The electric valve according to any one of claims 2 to 5, wherein the transmission plate (22) comprises two plate body portions (222), the two plate body portions (222) being symmetrically disposed about a central axis of the fixing hole (22b) of the base body portion, and accordingly, the input gear (31) is provided at an upper end thereof with two recesses (31a) for engagement with the two plate body portions (222), respectively, and the elastic body (23) is disposed between a side wall portion of each of the plate body portions (222) and the recess wall portion (31a 1).

7. The electric valve according to claim 6, wherein the input gear (31) comprises a large diameter portion (311) and a small diameter portion (312) which are coaxially arranged, the large diameter portion (311) is provided with a mounting hole which is coaxial with the rotor shaft (21), the base portion (221) of the transmission plate (22) is at least partially positioned inside the mounting hole, the peripheral wall of the mounting hole is provided with the recess (31a) which is opened upward, and the peripheral wall of the small diameter portion (312) is provided with the gear portion.

8. The electric valve of claim 7, wherein the gear reduction mechanism is a planetary gear mechanism, the planetary gear mechanism comprises a gear ring (32), a sun gear and a planetary wheel assembly, the input gear (31) is a sun gear, the gear ring (32) is supported and fixed on the valve body, the gear ring (32) comprises a top wall (321) and a peripheral wall extending downwards from the top wall (321), the peripheral wall encloses a cavity with a downward opening, the peripheral wall is provided with an inner meshing section, the top wall (321) is provided with a through hole, a small diameter part of the sun gear penetrates through the through hole of the top wall (321) and extends into the cavity, and a step surface between the large diameter part and the small diameter part is rotatably supported outside the top wall of the gear ring (32).