CN211574291U

CN211574291U - Electronic expansion valve throttling assembly capable of improving valve opening capacity

Info

Publication number: CN211574291U
Application number: CN201922301440.1U
Authority: CN
Inventors: 徐协斌; 陆海明
Original assignee: Hilite Automobile Technology Co ltd
Current assignee: Hilite Automobile Technology Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-09-25
Anticipated expiration: 2029-12-19

Abstract

The utility model discloses a can improve electronic expansion valve throttle subassembly of ability of opening valve, it relates to the electronic expansion valve field. The problem that the valve needle valve port abrasion failure risk is large in the existing throttling assembly is solved. Its technical scheme main points include the dabber screw rod, the fixed orifices has been seted up to dabber screw rod tip, be provided with sealing spring, needle seat and needle in the fixed orifices, its characterized in that: a spring seat is arranged in the fixed hole and comprises a cylindrical section and a contact part; the cylindrical section extends into the sealing spring, one end of the contact part is in contact with the sealing spring, and the other end of the contact part is in point contact with the end surface of the valve needle. The utility model discloses can reduce the wearing and tearing inefficacy risk of needle and valve port to can improve the ability of opening the valve.

Description

Electronic expansion valve throttling assembly capable of improving valve opening capacity

Technical Field

The utility model relates to an electronic expansion valve field, more specifically say, it relates to an electronic expansion valve throttle subassembly that can improve the ability of opening the valve.

Background

The existing electronic expansion valve is generally controlled by a stepping motor to regulate the flow of a refrigerant, and comprises a driver (the stepping motor), an actuating mechanism (a thread pair), a throttling mechanism (a valve needle valve port) and related auxiliary mechanisms. The stator coil of the stepping motor receives a pulse signal provided by the controller to drive the rotor magnetic ring to rotate, and the rotating motion of the rotor magnetic ring (which is fixedly connected with the mandrel screw into a whole through the connecting plate) drives the valve needle (which is integrated with the mandrel screw) to move up and down in the axial direction, so that the flow cross-sectional area of the valve needle and the valve port is controlled.

The existing throttling component generally comprises a mandrel screw rod, a sealing spring, a valve needle seat and a valve port, however, when the valve is opened from full closing to the position of a valve opening pulse point, the valve needle and the valve port are always in a mutual friction state, the risk of abrasion failure is increased, and the valve closing process is the same; in addition, the driving force of the stepping motor needs to overcome the friction force between the valve needle and the valve port all the time, and the coaxiality and roundness of the valve needle and the valve port cannot be perfect due to machining tolerance, so that the friction force is larger.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a can improve the electronic expansion valve throttle subassembly of opening valve ability, its wearing and tearing inefficacy risk that can reduce needle and valve port to improve the opening valve ability.

In order to achieve the above purpose, the utility model provides a following technical scheme:

an electronic expansion valve throttling assembly capable of improving the valve opening capacity comprises a mandrel screw, wherein a fixing hole is formed in the end part of the mandrel screw, a sealing spring, a valve needle seat and a valve needle are arranged in the fixing hole, a spring seat is arranged in the fixing hole, and the spring seat comprises a cylindrical section and a contact part; the cylindrical section extends into the sealing spring, one end of the contact part is in contact with the sealing spring, and the other end of the contact part is in point contact with the end surface of the valve needle.

Further, an end surface of the contact portion opposite to the valve needle is a spherical surface.

Further, the contact portion has a semicircular cross section.

Further, the end of the valve needle seat is in line contact with the valve needle.

Furthermore, the end face of the valve needle seat is an arc surface.

To sum up, the utility model discloses following beneficial effect has:

through increasing spring holder and needle contact, become the point with the stress surface of spring force effect on the needle, needle and the contact motionless and sealing spring rotate along with the dabber screw rod when making the valve open, in addition, become the stress of line with the stress surface that the refrigerant pressure that spring force and needle received acted on the needle file to can reduce the wearing and tearing inefficacy risk of needle and valve port, and improve the ability of opening the valve.

Drawings

Fig. 1 is a schematic structural diagram of an electronic expansion valve throttling assembly capable of improving valve opening capacity in an embodiment.

In the figure: 1. a mandrel screw; 11. a fixing hole; 2. a seal spring; 31. a cylindrical section; 32. a contact portion; 4. a valve needle seat; 5. a valve needle; 6. and (4) valve ports.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Example (b):

an electronic expansion valve throttling assembly capable of improving the valve opening capacity is disclosed, and referring to fig. 1, the electronic expansion valve throttling assembly comprises a mandrel screw rod 1, wherein a fixing hole 11 is formed in the end part of the mandrel screw rod 1, and a sealing spring 2, a valve needle seat 4 and a valve needle 5 are arranged in the fixing hole 11; a spring seat is also arranged in the fixed hole 11 and comprises a cylindrical section 31 and a contact part 32 which are integrally formed; the cylindrical section 31 extends into the sealing spring 2, and one end of the contact part 32 is in contact with the end part of the sealing spring 2, and the other end is in point contact with the end surface of the valve needle 5.

Referring to fig. 1, the end surface of the contact portion 32 opposite to the valve needle 5 is a spherical surface, and the axial cross section of the contact portion 32 in this embodiment is a semicircle; the end of the valve needle seat 4 is in line contact with the valve needle 5, and both ends of the valve needle seat 4 are arc surfaces in the embodiment.

The working principle is as follows:

the contact between the spring seat and the valve needle 5 is increased, so that the stress surface of the spring force acting on the valve needle 5 is changed into a point, and in addition, the stress surface of the spring force and the refrigerant pressure acting on the valve needle 5 acting on the valve needle seat 4 is changed into a line stress.

When the valve is opened from full closing to the position where the contact force of the valve port 6 of the valve needle 5 is equal to the pressure of a refrigerant, the valve needle 5 keeps in sealing contact (elastic deformation) with the valve port 6, the mandrel screw 1 rotates together with the sealing spring 2, the spring seat and the valve needle seat 4, and the valve needle 5 keeps still; when the valve is continuously opened to the position of the valve opening pulse point, the valve needle 5 and the valve port 6 are continuously kept in sealing contact and are not moved initially, the stepping motor only needs to overcome the linear contact friction torque of the valve needle 5 and the valve needle seat 4, and when the friction torque is larger than the friction torque of the valve needle 5 and the valve port 6, the valve needle 5 moves along with the mandrel screw 1, so that the abrasion failure risk of the valve needle 5 and the valve port 6 can be greatly reduced, and the valve opening capacity is improved.

Claims

1. The utility model provides a can improve electronic expansion valve throttle subassembly of ability of opening valve, includes the dabber screw rod, the fixed orifices has been seted up to dabber screw rod tip, be provided with sealing spring, needle seat and needle in the fixed orifices, its characterized in that: a spring seat is arranged in the fixed hole and comprises a cylindrical section and a contact part; the cylindrical section extends into the sealing spring, one end of the contact part is in contact with the sealing spring, and the other end of the contact part is in point contact with the end surface of the valve needle.

2. An electronic expansion valve throttling assembly capable of enhanced valve opening capability according to claim 1, wherein: the end surface of the contact part opposite to the valve needle is a spherical surface.

3. An electronic expansion valve throttling assembly capable of enhanced valve opening capability according to claim 2, wherein: the cross section of the contact part is semicircular.

4. An electronic expansion valve throttling assembly capable of increasing valve opening capacity according to any one of claims 1 to 3, wherein: the end part of the valve needle seat is in line contact with the valve needle.

5. An electronic expansion valve throttling assembly capable of enhanced valve opening capability according to claim 4, wherein: the end face of the valve needle seat is an arc surface.