CN218863408U

CN218863408U - Linear displacement sensor connecting assembly

Info

Publication number: CN218863408U
Application number: CN202223022012.3U
Authority: CN
Inventors: 谢志刚; 李杨; 徐亚萍
Original assignee: Xian Flight Automatic Control Research Institute of AVIC
Current assignee: Xian Flight Automatic Control Research Institute of AVIC
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-04-14
Anticipated expiration: 2032-11-11

Abstract

The application provides a linear displacement sensor coupling assembling, coupling assembling includes: the sensor support comprises a through hole and at least one double lug arranged on the circumference of the through hole; the through hole is used for installing a valve core; the sensor steel ball assembly is arranged on the double lugs, and is in contact with a linear displacement sensor which is used for measuring the displacement of the valve core; the application provides a sensor coupling assembling turns into linear displacement with the case corner, adopts the contact to connect and makes linear displacement sensor and case follow-up, realizes the monitor function.

Description

Linear displacement sensor connecting assembly

Technical Field

The application belongs to the technical field of aviation hydraulic pressure actuation, and particularly relates to a linear displacement sensor connecting assembly.

Background

With the rapid development of the aviation hydraulic actuating technology, the direct drive valve is widely applied, and a sensor is needed in a control loop to monitor the position of a valve core.

At present, a linear displacement sensor is conventionally adopted to monitor axial displacement of a spool of a slide valve, and the spool of a rotary direct drive valve is a corner, so that the requirement of monitoring the change of the corner of the spool of the rotary valve by the linear displacement sensor is met through structural design.

In order to solve the problem, a sensor connecting assembly is adopted, a valve core corner is converted into linear displacement, and a linear displacement sensor and the valve core follow up through contact connection, so that a monitoring function is realized.

SUMMERY OF THE UTILITY MODEL

To the above technical problem, the present application provides a linear displacement sensor coupling assembling, coupling assembling includes:

the sensor support comprises a through hole and at least one double lug arranged on the circumference of the through hole; the through hole is used for installing a valve core;

and the sensor steel ball assembly is arranged on the two lugs, and is in contact with a linear displacement sensor which is used for measuring the displacement of the valve core.

Preferably, the valve core is in interference fit with the through hole.

Preferably, the sensor steel ball assembly comprises:

a bolt capable of passing through the two lugs;

the steel ball is arranged on the bolt;

and the nut is used for locking the bolt and the steel ball on the double lugs.

Preferably, the steel ball is provided with a mounting hole, and the bolt can penetrate through the mounting hole.

Preferably, the linear displacement sensor comprises a link and a follower spring disposed on the link; the steel ball is in contact with the connecting rod.

Preferably, the linear displacement sensor is perpendicular to the spool during measurement.

The beneficial technical effect of this application:

according to the sensor connecting assembly, the rotation angle of the valve core is converted into linear displacement, and the linear displacement sensor and the valve core follow up through contact connection, so that a monitoring function is realized; meanwhile, the valve core has a one-way clutch function, the one-way clamping stagnation prevention function of the valve core and the linear displacement sensor can be realized, and the safety of the servo valve is improved; furthermore, different numbers of double lugs can be designed and included angles between the two lugs can be adjusted according to the requirement of electrical redundancy, so that the sensor support is matched with the linear displacement sensor.

Drawings

FIG. 1 is a schematic structural diagram of a sensor support according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a sensor steel ball assembly provided in an embodiment of the present application;

fig. 3 is a use state diagram of a linear displacement sensor connection assembly provided in an embodiment of the present application;

wherein: 1-a valve core; 2-linear displacement sensors; 201-a connecting rod; 202-a follower spring; 3-a sensor support; 301-a through hole; 302-both ears; 4-sensor steel ball assembly; 401-bolt; 402-a nut; and 403, steel balls.

Detailed Description

Referring to fig. 1-3, the present application provides a connecting assembly, comprising: the sensor comprises a valve core 1, a linear displacement sensor 2, a sensor support 3 and a sensor steel ball component 4.

The valve core 1 is in interference fit with the through hole 301, the sensor steel ball assembly 4 is connected with the double lugs 302, the bolt 401 penetrates through a center hole of the double lugs 302, the bolt 401 is locked on the double lugs 302 through the nut 402, and the steel ball 403 penetrates through the bolt 401 and flexibly rotates between the double lugs 302. The connecting rod 201 of the linear displacement sensor 2 is contacted with the steel ball 403, and the connecting rod 201 and the steel ball 403 are driven by the driven spring 202, so that the driven of the linear displacement sensor and the valve core rotation angle is realized, and the valve core rotation angle can be monitored.

It should be noted that, through the above structure, the function of monitoring the rotation angle of the valve core of the directly rotationally driven valve by using the linear displacement sensor is realized, and meanwhile, the function of contact connection is realized.

In one possible implementation, the sensors are distributed at different positions across the rotary direct drive valve. The sensor mount structure can be changed to increase or decrease the number of linear displacement sensors.

In other embodiments of the present application, the present application further provides the following implementation steps:

step 1: the rotation angle of the valve core 1 is determined to be 0-8 degrees according to the stroke range of the motor.

Step 2: the stroke 1.2mm of the linear displacement sensor 2 is regarded as the arc length S, the equivalent length R of the double lugs 302 of the sensor support 3 is determined to be 8.6mm according to the valve core rotation angle theta interval of 0-8 degrees, and S = theta R.

And step 3: according to the length and the width of the double lugs 302 of the sensor support 3, the diameter of a steel ball 403 of the sensor steel ball component 4 is designed, and circular arc displacement generated by rotation of the double lugs 302 is converted into axial linear displacement of the linear displacement sensor 2 through the steel ball 403. Because the arc length S = θ R, and the stroke L = R sin θ, when θ is sufficiently small, θ = sin θ can be approximately considered; for example, when θ =8 ° =0.13956 and sin θ =0.13917.

And 4, step 4: the thickness of the steel ball 403 of the sensor steel ball assembly 4 is designed according to the diameter of the contact surface of the connecting rod 201 so that the center of the steel ball is coaxial with the center of the sensor.

And 5: according to the number and the shape of the linear displacement sensors 2, the number and the included angle between the double lugs 302 are further determined, and the design of the sensor support 3 is completed.

Step 6: according to the torque of the rotary valve motor, the friction force of the integrated valve core and the design of the follow-up spring 202, the sensor connecting rod 201 is ensured to be attached to the steel ball 403.

And 7: if the connecting rod 202 is blocked, the sensor support 3 can be separated from the blocked sensor in a single direction, and certain safety guarantee is provided.

Claims

1. A linear displacement sensor connection assembly, characterized in that the connection assembly comprises:

2. The wire displacement sensor connection assembly of claim 1, wherein the spool has an interference fit with the through bore.

3. The linear displacement sensor connection assembly of claim 2, wherein the sensor steel ball assembly comprises:

a bolt capable of passing through the two lugs;

the steel ball is arranged on the bolt;

and the nut is used for locking the bolt and the steel ball on the double lugs.

4. A linear displacement sensor connection assembly according to claim 3, wherein the steel ball is provided with a mounting hole through which the bolt can pass.

5. The linear displacement sensor connection assembly of claim 4, wherein the linear displacement sensor comprises a linkage and a follower spring disposed on the linkage; the steel ball is in contact with the connecting rod.

6. The wire displacement sensor connection assembly of claim 5, wherein the wire displacement sensor is held perpendicular to the spool during measurement.