CN216045723U

CN216045723U - Valve core and moving iron fixing structure of proportional solenoid valve

Info

Publication number: CN216045723U
Application number: CN202121994786.5U
Authority: CN
Inventors: 孙刚; 奚晓栋; 贾孟
Original assignee: Renji Transmission Technology Suzhou Co ltd
Current assignee: Renji Transmission Technology Suzhou Co ltd
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2022-03-15
Anticipated expiration: 2031-08-24

Abstract

The utility model relates to a valve core and moving iron fixing structure of a proportional solenoid valve, which comprises a shell, a top magnetic conduction plate, a coil, a moving iron shell, moving iron, a valve core, a bottom magnetic conduction plate, a valve sleeve, a valve core positioning spring and a valve core positioning spring end cover, wherein the top magnetic conduction plate is arranged on the shell; the position of the moving iron in the moving iron shell is controlled by introducing different currents into the coil through the electromagnetic valve, so that the position of the valve core is driven to change, the valve core and the valve sleeve are precisely matched, and the confidential proportion control of flow or pressure is realized; the semi-cylindrical protrusion is added in the movable iron shell, and correspondingly, the corresponding semi-cylindrical recess is processed outside the movable iron, so that only axial movement can occur between the movable iron shell and the movable iron. The utility model can improve the stability and the precision of the proportional solenoid valve.

Description

Valve core and moving iron fixing structure of proportional solenoid valve

Technical Field

The utility model relates to the field of transmission mechanical devices, in particular to a valve core and moving iron fixing structure of a proportional solenoid valve.

Background

The valve core and the moving iron of the traditional proportional solenoid valve are not fixed together due to the reasons of materials and processes, the moving iron and the valve core are directly attached together, the valve core is positioned by the extrusion of the moving iron and the elastic force of a valve core positioning spring, but the moving iron can vibrate and rotate in the circumferential direction during working, the valve core can vibrate outside the expected movement, and the like, so that control errors are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a valve core and moving iron fixing structure of a proportional solenoid valve, which improves the structure of the traditional proportional solenoid valve and solves the problem that the stability and the precision are influenced in the traditional proportional solenoid valve.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows:

a fixed structure of a valve core and a moving iron of a proportional solenoid valve comprises a shell, a top magnetic conduction plate, a coil, a moving iron shell, a moving iron, a valve core, a bottom magnetic conduction plate, a valve sleeve, a valve core positioning spring and a valve core positioning spring end cover; the position of the moving iron in the moving iron shell is controlled by introducing different currents into the coil through the electromagnetic valve, so that the position of the valve core is driven to change, the valve core and the valve sleeve are precisely matched, and the confidential proportion control of flow or pressure is realized; the semi-cylindrical protrusion is added in the movable iron shell, and correspondingly, the corresponding semi-cylindrical recess is processed outside the movable iron, so that only axial movement can occur between the movable iron shell and the movable iron.

Furthermore, a threaded hole is additionally formed in the bottom of the moving iron, a stud is additionally arranged on the top of the valve core, and an inner hexagonal wrench hole is additionally formed in the bottom of the valve core.

As the preferred scheme, adopt 30 type servovalves, the supporting radial clearance of case, valve barrel is 1.4 ~ 3 um.

Preferably, the throttling edge round corners R of the valve core and the valve sleeve are matched with the axial matching size between the throttling edge round corners R of the valve core and the valve sleeve, sharp edges are reserved on the throttling edges of the valve core and the valve sleeve, and the maximum R is 0.5 um.

Further, the axial matching size is directly obtained by adopting a finish machining method, or is obtained by adopting a pneumatic matching grinding method and a hydraulic matching grinding method.

Furthermore, the semi-cylindrical protrusion inside the moving iron shell is obtained by directly changing a stamping die of the iron shell, and the corresponding semi-cylindrical recess machined outside the moving iron is obtained by machining the moving iron.

Has the advantages that:

the valve core and moving iron fixing structure of the proportional solenoid valve is characterized in that a semi-cylindrical protrusion is additionally arranged in a moving iron shell, the semi-cylindrical protrusion can be obtained by directly changing a stamping die of the iron shell, correspondingly, a corresponding semi-cylindrical recess is processed outside the moving iron, and the semi-cylindrical recess can be obtained by directly machining the moving iron. Therefore, only axial movement can be generated between the moving iron shell and the moving iron, and circumferential movement is avoided.

Through the structural design of the utility model, the moving iron/valve core is screwed together in the assembly, the integration of the moving iron/valve core is equivalent to the increase of the length of the moving iron, the vibration between the moving iron and the moving iron shell can be greatly reduced (the vibration is caused by the fit clearance of the moving iron shell/the moving iron).

Drawings

FIG. 1: the utility model discloses a structural schematic diagram of a valve core and moving iron fixing structure of a proportional solenoid valve.

FIG. 2: the structure schematic diagram of moving iron shell and moving iron.

In the figure: 1-shell, 2-top magnetic conduction plate, 3-coil, 4-moving iron shell, 5-moving iron, 6-valve core, 7-bottom magnetic conduction plate, 8-valve sleeve, 9-valve core positioning spring and 10-valve core positioning spring end cover.

Detailed Description

The present invention will be described in further detail with reference to specific examples, which are provided for illustration only and are not intended to limit the scope of the present invention. In the description of the present invention, it is to be noted that:

the utility model provides a valve core and moving iron fixing structure of a proportional solenoid valve, which comprises a shell 1, a top magnetic conduction plate 2, a coil 3, a moving iron shell 4, a moving iron 5, a valve core 6, a bottom magnetic conduction plate 7, a valve sleeve 8, a valve core positioning spring 9 and a valve core positioning spring end cover 10, as shown in figure 1.

The utility model controls the position of the moving iron 5 in the moving iron shell 4 by the electromagnetic valve and the current with different sizes is led into the coil 3, thereby driving the position change of the valve core 6, leading the valve core 6 and the valve sleeve 8 to be precisely matched and realizing the secret proportion control of the flow or the pressure.

Wherein, increase half-cylindrical and protruding in moving iron shell 4 inside, corresponding, process out corresponding half-cylindrical type recess in moving iron 5 outside, make and move between moving iron shell 4 and the moving iron 5 and can only take place axial motion.

Wherein, increase the screw hole at the moving iron 5 bottom, increase the double-screw bolt at case 6 top, increase the allen key hole in the bottom of case 6. In this way, the moving iron 5 and the valve core 6 can be screwed together during assembly. The integration of the moving iron 5 and the valve core 6 is equivalent to the increase of the length of the moving iron 5, and the vibration between the moving iron 5 and the moving iron shell 4 can be greatly reduced (the reason of the vibration is the fit clearance between the moving iron shell 4 and the moving iron 5). This scheme is with low costs, can prevent moving iron 5 and case 6 breaking away from when high-speed motion, eliminates moving iron 5's rotation, reduces moving iron 5 and case 6's vibration, and then promotes the stability and the precision of this valve.

In the embodiment, a 30-type servo valve is adopted, and the radial clearance between the valve core 6 and the valve sleeve 8 is 1.4-3 um. The valve core 6 and the valve sleeve 8 have the throttling edge round corners R matched with the axial matching size between the two, sharp edges are reserved on the throttling edges of the valve core 6 and the valve sleeve 8, and the maximum R is 0.5 um.

Wherein, the axial matching size is directly obtained by adopting a finish machining method, or obtained by adopting a pneumatic matching grinding method and a hydraulic matching grinding method.

In the embodiment, the semi-cylindrical protrusion inside the moving iron shell 4 is obtained by directly changing a stamping die of the iron shell 4, and the corresponding semi-cylindrical recess machined outside the moving iron 5 is obtained by machining the moving iron 5.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the utility model in any way, and any person skilled in the art can make any simple modification, equivalent replacement, and improvement on the above embodiment without departing from the technical spirit of the present invention, and still fall within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a case and moving iron fixed knot of proportion solenoid valve constructs which characterized in that: the magnetic valve comprises a shell, a top magnetic conduction plate, a coil, a moving iron shell, a moving iron, a valve core, a bottom magnetic conduction plate, a valve sleeve, a valve core positioning spring and a valve core positioning spring end cover; the position of the moving iron in the moving iron shell is controlled by introducing different currents into the coil through the electromagnetic valve, so that the position of the valve core is driven to change, the valve core and the valve sleeve are precisely matched, and the confidential proportion control of flow or pressure is realized; the semi-cylindrical protrusion is added in the movable iron shell, and correspondingly, the corresponding semi-cylindrical recess is processed outside the movable iron, so that only axial movement can occur between the movable iron shell and the movable iron.

2. The valve core and moving iron fixing structure of the proportional solenoid valve according to claim 1, wherein: the bottom of the moving iron is additionally provided with a threaded hole, the top of the valve core is additionally provided with a stud, and the bottom of the valve core is additionally provided with an inner hexagonal wrench hole.

3. The valve core and moving iron fixing structure of the proportional solenoid valve according to claim 1, wherein: a30-type servo valve is adopted, and the radial clearance of the matched valve core and valve sleeve is 1.4-3 um.

4. The valve core and moving iron fixing structure of the proportional solenoid valve according to claim 1, wherein: the valve core and the valve sleeve have the throttling edge fillet R matched with the axial matching size between the throttling edge fillet R and the valve sleeve, sharp edges are reserved on the throttling edges of the valve core and the valve sleeve, and the maximum R is 0.5 um.

5. The valve core and moving iron fixing structure of the proportional solenoid valve according to claim 4, wherein: the axial matching size is directly obtained by adopting a finish machining method, or is obtained by adopting a pneumatic matching grinding method and a hydraulic matching grinding method.

6. The valve core and moving iron fixing structure of the proportional solenoid valve according to claim 1, wherein: the semi-cylindrical protrusion inside the moving iron shell is obtained by directly changing a stamping die of the iron shell, and the corresponding semi-cylindrical recess machined outside the moving iron is obtained by machining the moving iron.