阅读说明：本技术 电子膨胀阀装配工艺 (Electronic expansion valve assembling process ) 是由 王鑫楠 林元阳 康志军 于 2018-08-29 设计创作，主要内容包括：本发明提供了一种电子膨胀阀装配工艺,该装配工艺包括：将阀针部件的螺杆与螺母部件进行连接；将转子套装在螺母部件上,并将转子与螺杆固定连接；通过线圈驱动转子转动以调整螺杆和转子相对螺母部件的位置。通过本申请提供的技术方案,能够解决现有技术中的无法准确确定流量零点位置的问题。(The invention provides an electronic expansion valve assembling process, which comprises the following steps: connecting a screw rod of the valve needle component with a nut component; sleeving a rotor on the nut component, and fixedly connecting the rotor with the screw rod; the rotor is driven to rotate by the coil to adjust the position of the screw and the rotor relative to the nut member. Through the technical scheme provided by the application, the problem that the position of the flow zero point cannot be accurately determined in the prior art can be solved.)

1. An electronic expansion valve assembly process, characterized in that the assembly process comprises:

connecting a screw rod of the valve needle component with a nut component;

sleeving a rotor on the nut component, and fixedly connecting the rotor with the screw rod;

the rotor is driven to rotate by a coil to adjust the position of the screw rod and the rotor relative to the nut component.

2. The assembly process of an electronic expansion valve according to claim 1, wherein connecting the screw and nut members of the valve needle member comprises:

the nut component is provided with a threaded section, the screw rod is in threaded connection with the nut component, and the screw rod is screwed from a first end of the threaded section to a second end of the threaded section;

and reversely rotating the screw rod by a preset angle to complete the connection of the screw rod and the nut component.

3. The assembly process of an electronic expansion valve according to claim 2, wherein the rotor is sleeved on the nut member and fixedly connected with the screw, specifically comprising:

sleeving a rotor on the nut component, and adjusting the position of the rotor relative to the nut component to enable the rotor to be located at the maximum opening position of the valve needle;

and welding and connecting the rotor and the screw rod.

4. The assembly process of claim 3, wherein the rotor is driven by the coil to rotate so as to adjust the relative position of the screw and the nut member, and comprises:

driving the rotor to rotate through a coil so as to adjust the screw rod and the rotor to a flow zero point position;

and then the rotor is driven to rotate by a coil so as to adjust the screw rod and the rotor to the position of a valve opening pulse point.

5. The process of assembling an electronic expansion valve of claim 1, wherein the valve needle component further comprises a valve needle assembly, and wherein the process further comprises, prior to driving the rotor to rotate by the coil to adjust the relative position of the screw and nut components:

and butting the valve needle assembly with one end of the screw rod, which is positioned outside the nut component.

6. The process of assembling an electronic expansion valve of claim 1, wherein the valve needle component further comprises a valve needle assembly integrally formed with the threaded rod.

7. The process of assembling an electronic expansion valve according to claim 1, further comprising a valve core, wherein after the rotor is driven by a coil to rotate to adjust the position of the screw and the rotor relative to the nut member, the process further comprises:

and butting the valve needle of the valve needle component with the valve core.

8. The process of assembling an electronic expansion valve according to claim 7, further comprising a valve seat, wherein after docking the valve needle of the valve needle component with the valve cartridge, the process further comprises:

installing the valve core in the valve seat.

9. The process of assembling an electronic expansion valve according to claim 5, further comprising a guide sleeve, wherein after docking the valve needle assembly with the end of the screw rod outside the nut member, the process further comprises:

and sleeving a guide sleeve outside the rotor, wherein the valve needle assembly penetrates out of one end of the guide sleeve.

Technical Field

The invention relates to the technical field of electronic expansion valves, in particular to an electronic expansion valve assembling process.

Background

An electronic expansion valve is a throttling element with a preset program. Wherein, electronic expansion valve mainly includes: the valve comprises a sleeve, a rotor, a nut component, a valve needle component, a valve core component and a valve seat.

The existing electronic expansion valve is installed as follows:

step 1, firstly, a valve needle component is installed in a nut component, and then the valve needle component is installed in a valve core component and is welded and fixed;

step 2, rotating the valve needle component to enable the valve needle on the valve needle component to be in contact with the valve core, wherein the position is a flow zero point;

step 3, continuing to rotate the valve needle, wherein the valve needle cannot move downwards due to contact with the valve core, and the screw continues to push so that the valve core is separated from the valve core sleeve, wherein the position is a valve opening pulse point;

step 4, keeping the valve needle component still, installing the rotor and limiting the position of the rotor to the lower part, fixing the rotor and the valve needle component by welding, enabling the rotor to drive the valve needle component to rotate together, and finally sleeving the sleeve on the outer side of the rotor to finish installation;

when the existing electronic expansion valve is installed, a screw on a valve needle part is clamped by a three-gripping clamp and then rotated when the step 2 is executed, and the flow zero point is determined through the judgment of the torsion. The screw rod is prevented from being scratched when the screw rod is tightly clamped by the clamp, and the flow zero point is judged through the torque, so that the screw rod cannot be accurately clamped by the clamp in the actual clamping process, the position of the flow zero point cannot be accurately determined, and the electronic expansion valve cannot be accurately controlled.

Disclosure of Invention

The invention provides an electronic expansion valve assembling process, which aims to solve the problem that the position of a flow zero point cannot be accurately determined in the prior art.

The invention provides an electronic expansion valve assembling process, which comprises the following steps: connecting a screw rod of the valve needle component with a nut component; sleeving a rotor on the nut component, and fixedly connecting the rotor with the screw rod; the rotor is driven to rotate by the coil to adjust the position of the screw and the rotor relative to the nut member.

Further, the connecting of the screw rod and the nut component of the valve needle component specifically comprises: the nut component is provided with a threaded section, the screw rod is in threaded connection with the nut component, and the screw rod is screwed from a first end of the threaded section to a second end of the threaded section; and reversely rotating the screw rod by a preset angle to complete the connection of the screw rod and the nut component.

Further, with the rotor suit on nut part to with rotor and screw rod fixed connection, specifically include: sleeving the rotor on the nut component, and adjusting the position of the rotor relative to the nut component to enable the rotor to be located at the maximum opening position of the valve needle; and welding the rotor and the screw rod.

Further, the relative position of the screw rod and the nut component is adjusted by driving the rotor to rotate through the coil, and the method specifically comprises the following steps: the rotor is driven to rotate through the coil, so that the screw and the rotor are adjusted to a flow zero point position; and then the rotor is driven to rotate by the coil so as to adjust the screw and the rotor to the position of a valve opening pulse point.

Further, the valve needle component also comprises a valve needle assembly, and before the rotor is driven by the coil to rotate so as to adjust the relative position of the screw rod and the nut component, the assembling process also comprises the following steps: and butting the valve needle assembly with one end of the screw rod, which is positioned outside the nut component.

Further, the valve needle component also comprises a valve needle assembly, and the valve needle assembly and the screw rod are integrally formed.

Further, the electronic expansion valve also comprises a valve core, and after the rotor is driven to rotate by the coil to adjust the positions of the screw rod and the rotor relative to the nut component, the assembly process also comprises the following steps: and butting the valve needle of the valve needle component with the valve core.

Further, the electronic expansion valve further comprises a valve seat, and after the valve needle of the valve needle component is butted with the valve core, the assembling process further comprises the following steps: the valve core is installed in the valve seat.

Further, the electronic expansion valve further comprises a guide sleeve, and after the valve needle assembly is in butt joint with one end of the screw rod, which is located on the outer side of the nut component, the assembling process further comprises the following steps: the guide sleeve is sleeved outside the rotor, and the valve needle assembly penetrates out of one end of the guide sleeve.

When the technical scheme of the invention is applied, when the electronic expansion valve is installed, the screw rod of the valve needle component is connected with the nut component, then the rotor is sleeved on the nut component, and the rotor is fixedly connected with the screw rod, so that the rotor and the screw rod can synchronously rotate, and then the rotor is driven by the coil to rotate, thus the positions of the screw rod and the rotor relative to the nut component can be adjusted. In the assembly process, the position of the flow zero point can be adjusted by adopting a mode of driving the rotor to rotate by the coil without adjusting by a clamp or a manual mode, so that the surface of the screw can be prevented from being scratched, and the position of the flow zero point can be accurately adjusted.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 a-1 f are schematic diagrams illustrating an installation process of an electronic expansion valve according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of an electronic expansion valve according to an embodiment of the present invention;

fig. 3a to fig. 3d are schematic diagrams illustrating an installation process of an electronic expansion valve according to a second embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a nut member; 21. a screw; 22. a valve needle assembly; 30. a rotor; 40. a guide sleeve; 50. a valve core; 60. a valve seat.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1a to 1f, a first embodiment of the present invention provides an electronic expansion valve assembly process, including:

connecting the screw rod 21 of the valve needle component with the nut component 10, namely, as shown in fig. 1a, connecting the screw rod 21 with the nut component 10 in a threaded manner;

sleeving the rotor 30 on the nut component 10, and fixedly connecting the rotor 30 with the screw 21, that is, as shown in fig. 1b, after the screw 21 is connected with the nut component 10, sleeving the rotor 30 on the outer side of the nut component 10, and fixedly connecting the rotor 30 with the screw 21, so as to realize synchronous rotation of the rotor 30 and the screw 21;

the rotor 30 is driven to rotate by the coil to adjust the positions of the screw 21 and the rotor 30 relative to the nut member 10.

When the electronic expansion valve is mounted through the assembly process, the screw 21 of the valve needle component is connected with the nut component 10, then the rotor 30 is sleeved on the nut component 10, and the rotor 30 is fixedly connected with the screw 21, so that the rotor 30 and the screw 21 can synchronously rotate, and then the rotor 30 is driven to rotate through the coil, so that the positions of the screw 21 and the rotor 30 relative to the nut component 10 can be adjusted. In the assembly process, the position of the flow zero point can be adjusted by adopting a mode of driving the rotor 30 to rotate by the coil without adjusting by a clamp or a manual mode, so that the surface of the screw rod 21 can be prevented from being scratched, and the flow zero point can be accurately adjusted.

Specifically, in the step of connecting the screw rod of the valve needle component with the nut component, the method specifically includes:

the nut component 10 is provided with a threaded section, the screw 21 is in threaded connection with the nut component 10, and the screw 21 is screwed from a first end of the threaded section to a second end of the threaded section;

the screw 21 is then reversely rotated by a preset angle to complete the coupling of the screw 21 with the nut member 10. Through the operation process, a thread section with a certain length can be reserved between the screw rod 21 and the nut component 10, and a buffering effect is achieved.

Referring to fig. 1b and 2, in the step of sleeving the rotor 30 on the nut member 10 and fixedly connecting the rotor 30 with the screw 21, the method specifically includes:

the rotor 30 is further provided with a blocking piece, the outer wall of the nut component 10 is provided with a spiral sliding rail, the spiral sliding rail is formed by a thin spring, a thick spring is further arranged on the spiral sliding rail, the end part of the thick spring is abutted to the blocking piece, so that when the rotor rotates, the thick spring is driven by the blocking piece to move up and down along the spiral sliding rail, in the embodiment, when the thick spring moves to the upper end part along the spiral sliding rail, the thick spring is at the maximum opening position of the valve needle due to the fact that the distance between the screw rod 21 and the valve needle component 22 relative to the valve core is the farthest, correspondingly, the thick spring moves to the lower end part along the spiral sliding rail, and the valve. After the rotor 30 is sleeved on the nut member 10, the position of the rotor 30 relative to the nut member 10 is adjusted to position the rotor 30 at the maximum opening position of the valve needle to determine the adjustment reference of the rotor 30, and after the adjustment is completed, the rotor 30 and the screw 21 are welded and fixed.

In the step of performing the rotation of the rotor 30 by the coil to adjust the relative position of the screw 21 and the nut member 10, the method specifically includes:

the rotor 30 is driven to rotate by the coil, so that the screw 21 and the rotor 30 are adjusted to a flow zero point position, namely, the rotor 30 is rotated downwards to enable the baffle plate to drive the coarse spring to rotate to a lower end position;

the rotor 30 is driven to rotate by the coil, so that the screw 21 and the rotor 30 are adjusted to the position of the valve-opening pulse point, that is, the rotor 30 is rotated upwards, and the screw 21 and the rotor 30 are rotated to the position of the valve-opening pulse point.

Because different valve opening pulse points are set by the electronic expansion valve, the flow curve of the electronic expansion valve can be influenced, so that the valve opening pulse points of the electronic expansion valve can be accurately set by the assembly process provided by the embodiment, the consistency of the electronic expansion valve installed by the assembly process can be further ensured, and the control precision of the electronic expansion valve can be further ensured.

In this embodiment, the needle member further includes a needle assembly 22, the needle assembly 22 is provided separately from the screw 21, and before the rotor 30 is driven to rotate by the coil to adjust the relative position of the screw 21 and the nut member 10, the assembling process further includes:

the needle assembly 22 is abutted with one end of the screw rod 21 outside the nut member 10 as shown in fig. 1c to connect the screw rod 21 with the needle assembly 22, and the needle assembly 22 is driven to move up and down by the rotation of the screw rod 21.

The electronic expansion valve further comprises a guide sleeve 40, and after the valve needle assembly 22 is butted with one end of the screw rod 21, which is positioned outside the nut component 10, the assembling process further comprises the following steps:

the guide sleeve 40 is sleeved outside the rotor 30, and the valve needle assembly 22 is arranged through one end of the guide sleeve 40. That is, as shown in fig. 1d, the guiding sleeve 40 is sleeved outside the rotor 30 to protect the rotor 30 and the internal structure through the guiding sleeve 40.

In this embodiment, the electronic expansion valve further includes a valve core 50, and after the rotor 30 is driven to rotate by the coil to adjust the positions of the screw 21 and the rotor 30 relative to the nut member 10, the assembling process further includes:

the needle of the needle component is butted against the cartridge 50, that is, as shown in fig. 1e, the cartridge 50 is butted against the needle, and the needle is attached to the cartridge 50. Specifically, needle subassembly 22 includes needle, needle cover and pretension spring, and the needle is worn to establish in the needle cover, and the pretension spring is located the needle cover, and pretension spring's one end and needle butt, pretension spring's the other end and the inner wall butt of needle cover. The valve element 50 and the valve needle can be abutted with each other according to a predetermined force, which may be the gravity of the valve needle itself or a force less than or equal to the elastic force of a pre-tightening spring.

The electronic expansion valve further includes a valve seat 60, and after the valve needle of the valve needle component is butted with the valve core 50, the assembling process further includes:

the valve core 50 is installed in the valve seat 60, that is, as shown in fig. 1f, the valve core 50 is installed in the valve seat 60, the valve core 50 can be welded on the valve seat 60 or the guide sleeve 40, and the guide sleeve 40 is fixedly connected with the valve seat 60, so that the installation operation can be completed.

Through the electronic expansion valve assembly process, the relative positions of the rotor and the screw rod relative to the nut component are adjusted in a mode that the coil drives the rotor to rotate, the adjustment accuracy is high, damage to the screw rod can be avoided, meanwhile, the accuracy of a valve opening pulse point is guaranteed, further, after the whole assembly process is completed, the valve opening precision of the electronic expansion valve can be guaranteed, installation operation is facilitated, and installation efficiency and installation precision are improved.

As shown in fig. 3a to 3d, a second embodiment of the present invention provides an assembling process of an electronic expansion valve, which is different from the first embodiment in that in the present embodiment, the valve needle assembly 22 and the screw 21 are integrally formed, so that the installation step of connecting the screw 21 and the valve needle assembly 22 can be omitted. That is, as shown in fig. 3a, the screw 21 and the needle assembly 22 may be directly connected to the nut member 10, and after the connection is completed, the rotor 30 is sleeved on the nut member 10, and the rotor 30 is fixedly connected to the screw 21, so as to achieve the synchronous rotation of the rotor 30 and the screw 21. After the rotor 30 is installed, the state shown in fig. 3b is entered, the guiding sleeve 40 is sleeved on the outer side of the rotor 30, and after the sleeving is completed, the relative position of the rotor 30 and the nut component 10 is adjusted through the coil. After the adjustment is completed, the state shown in fig. 3c is entered, the cartridge 50 is butted with the valve needle on the valve needle assembly 22, and finally the cartridge 50 is correspondingly installed in the valve seat 60 to complete the installation.

Through the assembly process provided by the second embodiment, the screw 21 and the valve needle assembly 22 are integrally formed, so that the installation steps can be reduced, the installation efficiency is further improved, the installation process is simplified, and the number of parts is reduced.

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

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

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

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.