CN218883144U

CN218883144U - Rotor assembly of electronic expansion valve

Info

Publication number: CN218883144U
Application number: CN202320170890.5U
Authority: CN
Inventors: 吴一清
Original assignee: Zhejiang Minte Auto Air Conditioner Co ltd
Current assignee: Zhejiang Minte Auto Air Conditioner Co ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-04-18
Anticipated expiration: 2033-02-10

Abstract

The utility model discloses an electronic expansion valve's rotor assembly, including the valve needle cover, the needle, magnet steel inserts and rotor core inserts, the magnet steel inserts is located the needle cover, the inner edge joint of magnet steel inserts and valve needle cover is fixed, the rotor core inserts is located the needle cover, the centre bore has been seted up on the magnet steel inserts, the upper end of rotor core inserts is located the centre bore, and the upper end of rotor core inserts is located the central point of centre bore, rotor core inserts and valve core cover sliding connection, the needle is located the rotor core inserts, the rotor core inserts is used for driving the case and removes, the upper end of rotor core inserts is equipped with the spring, it is used for resetting the rotor core inserts to go up the spring, the utility model discloses rational in infrastructure, the magnet steel can produce a thrust to the rotor core inserts, this thrust has balanced rotor core inserts self frictional force that receives for during operation, the rotor core inserts receives the effect after of external magnetic force, can drive the needle very fast and remove, accomplishes opening or closing of valve, has improved the sensitivity of rotor assembly.

Description

Rotor assembly of electronic expansion valve

Technical Field

The utility model relates to a solenoid valve field, in particular to electronic expansion valve's rotor assembly.

Background

Solenoid valves are industrial devices that are controlled electromagnetically, and are the basic elements of automation for controlling fluids. In solenoid valves, the rotor assembly is the most direct element to achieve valve opening or closing. The response sensitivity of the rotor assembly to the external magnetic force is an important factor for judging the sensitivity of the electromagnetic valve. Therefore, how to design a rotor assembly capable of sensitively responding to the change of the external magnetic force is a problem to be solved at the present stage. In view of the above problems, a solution is proposed as follows.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electronic expansion valve's rotor assembly has the outside magnetic force change of ability quick response to the advantage of the shutoff state of regulation to the valve.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides an electronic expansion valve's rotor assembly, includes valve needle cover, needle, magnet steel inserts and rotor core inserts, the magnet steel inserts is located the needle cover, the inner edge joint of magnet steel inserts and valve needle cover is fixed, the rotor core inserts is located the needle cover, the centre bore has been seted up on the magnet steel inserts, the upper end of rotor core inserts is located the centre bore, just the upper end of rotor core inserts is located the central point of centre bore and puts, rotor core inserts and valve core cover sliding connection, the needle is located the rotor core inserts, the rotor core inserts is used for driving the case removal, the upper end of rotor core inserts is equipped with the spring, it is used for the rotor core inserts that resets to go up the spring.

Preferably, the rotor core insert comprises a positioning seat and a sliding tube, the diameter of the lower end of the positioning seat is the same as the inner diameter of the valve needle sleeve, the lower end of the positioning seat is clamped and fixed with the inside of the valve needle sleeve, a slide way is arranged in the positioning seat, the sliding tube is located in the slide way and connected with the slide way, the valve needle is fixed with the sliding tube, and the positioning seat is used for limiting the position of the sliding tube and limiting the moving direction of the sliding tube.

Preferably, the upper end of the valve needle is a connecting section, the top of the connecting section is hemispherical, the top of the connecting section is inserted into the top of the sliding pipe, a lower spring is sleeved on the connecting section, the upper end of the lower spring is connected with the inside of the sliding pipe, the lower end of the lower spring is fixedly connected with the valve needle, and the lower spring is used for resetting the valve needle.

Preferably, the lower end of the valve needle is fixedly provided with a plugging section, the plugging section comprises a lower section and an upper section, both the lower section and the upper section are in an inverted circular truncated cone shape, the side slope of the lower section is greater than that of the upper section, and the upper section and the lower section are matched to realize the plugging of the valve.

The utility model has the advantages that: the magnetic steel applies thrust to the sliding pipe, so that the sliding pipe is completely fixed by the tensile force of the outer spring in an initial state, and after the external coil is electrified to generate a magnetic field, the magnetic force generated by the coil on the sliding pipe can drive the sliding pipe and the valve needle to move only by overcoming the elastic force of the upper spring, so that the sensitivity of the sliding pipe to the corresponding external magnetic field is improved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment;

FIG. 2 is a sectional structural view of the embodiment.

Reference numerals are as follows: 1. a valve needle sleeve; 2. a valve needle; 3. a magnetic steel insert; 4. a rotor core insert; 5. an upper spring; 6. positioning seats; 7. a sliding tube; 8. a connection section; 9. a lower spring; 10. a plugging section; 11. a lower section; 12. and (4) an upper section.

Detailed Description

The following is only the preferred embodiment of the present invention, the protection scope is not limited to this embodiment, and all technical solutions belonging to the idea of the present invention should belong to the protection scope of the present invention. In which like parts are designated by like reference numerals. It should be noted that as used in the following description, the terms "front," "back," "left," "right," "upper," and "lower" refer to directions in the drawings, and the terms "bottom" and "top," "inner," and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in fig. 1 and 2, a rotor assembly of an electronic expansion valve includes a valve needle 2 sleeve 1, a valve needle 2, a magnetic steel insert 3 and a rotor core insert 4. The rotor core insert 4 is positioned in the valve needle 2 sleeve 1, and the rotor core insert 4 comprises a positioning seat 6 and a sliding tube 7. The diameter of the lower end of the positioning seat 6 is the same as the inner diameter of the valve needle 2 sleeve 1. The positioning seat 6 is clamped inside the valve needle 2 sleeve 1 and is fixedly clamped with the inside of the valve needle 2 sleeve 1. A slide way is arranged in the positioning seat 6, and the sliding tube 7 is positioned in the slide way and is in sliding connection with the slide way. The valve needle 2 is fixed with the sliding tube 7, and the sliding tube 7 can drive the valve needle 2 to move synchronously when driven by a magnetic field. The positioning seat 6 can limit the sliding direction of the sliding tube 7, so that the sliding tube 7 cannot deviate during sliding, and the sliding tube 7 can drive the valve needle 2 to seal the valve.

The upper end of the sliding tube 7 is provided with an upper spring 5, when the sliding tube 7 is moved downwards under the action of external magnetic force, the sliding tube 7 will stretch the upper spring 5, and the upper spring 5 generates elasticity for the sliding tube 7. When the external magnetic force disappears, the sliding tube 7 is pulled to move by the elastic force of the upper spring 5 on the sliding tube 7, so that the sliding tube 7 moves to the initial position.

The upper end of the valve needle 2 is a connecting section 8, and the top of the connecting section 8 is hemispherical. The top of the connecting section 8 is inserted into the top of the sliding tube 7, and a large friction force exists between the connecting section 8 and the sliding tube 7, so that the connecting section and the sliding tube cannot easily move. The connecting section 8 is sleeved with a lower spring 9, the upper end of the lower spring 9 is connected with the inside of the sliding tube 7, and the lower end of the lower spring 9 is fixedly connected with the valve needle 2. If the thrust force exerted by the external magnetic field is too strong, the lower end of the valve needle 2 can not move after abutting against the valve, and the sliding tube 7 can continue to slide for a certain distance along the connecting section 8. After sliding, the upper spring 5 is continuously stretched, the lower spring 9 is compressed, and the elastic force generated by the upper spring 5 and the lower spring 9 on the sliding pipe 7 can counteract the excessive magnetic force applied by the external magnetic field, so that the abrasion caused by excessive contact between the valve needle 2 and the valve is prevented, and the valve needle 2 is protected from being damaged. When the external magnetic field disappears, the elastic force of the upper spring 5 can pull the sliding tube 7 to move to the initial position, and the elastic force of the lower spring 9 can push the valve needle 2 to return the relative position between the valve needle 2 and the sliding tube 7 to the initial position.

The lower extreme of needle 2 sets firmly the shutoff section 10, and shutoff section 10 includes lower section 11 and upper segment 12, and lower section 11 and upper segment 12 are the inverted circular truncated cone shape. The slope of the side edge of the lower segment 11 is greater than that of the side edge of the upper segment 12, the overall diameter of the lower segment 11 is small, the lower segment can be inserted into a valve to be plugged, and the upper segment 12 can be plugged outside the valve, so that the valve can be sealed.

The magnetic steel insert 3 is positioned in the valve needle 2 sleeve 1 and is clamped and fixed with the inner edge of the valve needle 2 sleeve 1. The magnetic steel insert 3 is provided with a central hole, and the upper end of the rotor core insert 4 is positioned in the central hole. The magnetic field of magnet steel itself can produce thrust to sliding tube 7, and this thrust can balance the frictional force between sliding tube 7 and positioning seat 6 for outside magnetic force only need overcome the pulling force of last spring 5 can promote sliding tube 7 and remove, has increased sliding tube 7's sensitivity.

The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an electronic expansion valve's rotor assembly, includes needle (2) cover (1), needle (2), magnet steel insert (3) and rotor core inserts (4), its characterized in that, magnet steel insert (3) are located needle (2) cover (1), magnet steel insert (3) are fixed with the inner edge joint of needle (2) cover (1), rotor core inserts (4) are located needle (2) cover (1), the centre bore has been seted up on magnet steel insert (3), the upper end of rotor core inserts (4) is located the centre bore, just the upper end of rotor core inserts (4) is located the central point of centre bore and puts, rotor core inserts (4) and case cover sliding connection, needle (2) are located rotor core inserts (4), rotor core inserts (4) are used for driving the case removal, the upper end of rotor core inserts (4) is equipped with spring (5), it is used for resetting rotor core inserts (4) to go up spring (5).

2. The rotor assembly of an electronic expansion valve according to claim 1, wherein the rotor core insert (4) comprises a positioning seat (6) and a sliding tube (7), the diameter of the lower end of the positioning seat (6) is the same as the inner diameter of the valve needle (2) sleeve (1), the lower end of the positioning seat (6) is fixed to the inside of the valve needle (2) sleeve (1) in a clamping manner, a slide way is arranged in the positioning seat (6), the sliding tube (7) is located in the slide way and connected to the slide way, the valve needle (2) is fixed to the sliding tube (7), and the positioning seat (6) is used for defining the position of the sliding tube (7) and defining the moving direction of the sliding tube (7).

3. The rotor assembly of an electronic expansion valve according to claim 2, wherein the upper end of the valve needle (2) is a connecting section (8), the top of the connecting section (8) is hemispherical, the top of the connecting section (8) is inserted into the top of the sliding tube (7), the connecting section (8) is sleeved with a lower spring (9), the upper end of the lower spring (9) is connected with the inside of the sliding tube (7), the lower end of the lower spring (9) is fixedly connected with the valve needle (2), and the lower spring (9) is used for resetting the valve needle (2).

4. The rotor assembly of an electronic expansion valve according to claim 3, wherein the lower end of the valve needle (2) is fixedly provided with a blocking section (10), the blocking section (10) comprises a lower section (11) and an upper section (12), both the lower section (11) and the upper section (12) are in a shape of an inverted truncated cone, the side slope of the lower section (11) is greater than that of the upper section (12), and the upper section (12) and the lower section (11) cooperate to block the valve.