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Improved design of piston type actuating mechanism

An actuator, piston-type technology, applied in the field of improved design of piston-type actuators, can solve problems such as difficulty in controlling friction

Inactive Publication Date: 2009-05-13
GUIZHOU HONGLIN MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the above-mentioned existing problems, and fundamentally solve the problem that the friction force in the actuator is difficult to control by converting the fluoroplastic cup piston actuator from a "rigid" structure to a "flexible" structure. , to achieve the purpose of improving the scope of application of the fluorine plastic cup piston actuator and the reliability of low temperature conditions

Method used

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  • Improved design of piston type actuating mechanism
  • Improved design of piston type actuating mechanism

Examples

Experimental program
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Effect test

Embodiment 1

[0013] Such as Figure 4 As shown, the fluoroplastic cup (2) is installed on the valve (3), and the fluoroplastic cup (2) is equipped with a tension spring (5) and a spring leaf (4), and the optional thickness of the L2 dimension is 0.2mm The adjustment washer (1) is installed on the valve and against the retaining ring (6), the size of L is fixed, the compression space (L-0.2) of the tension spring (5) and the spring leaf (4) is fixed, and the leather The size of the bowl tension (that is, the size of the friction between the cup and the valve bushing) changes with the change of L-0.2.

Embodiment 2

[0015] Such as Figure 5 Shown, L 2 The size place is equipped with 3 adjusting washers (1) with a thickness of 0.1mm, the total thickness is 0.3mm, and the size of L is fixed. Compared with Example 1, L 2 The size increases by 0.1mm, and the compression space of the tension spring is squeezed by 0.1mm. At this time, the tension of the cup increases accordingly, and the friction between the cup and the valve bush increases. Effect and application

[0016] The invention has reliable quality and good manufacturability. Compared with the traditional adjustment method, the adjustment function of the structure of the invention is obvious, and the adjustable range is widened, which solves and improves the application range and reliability of the fluorine plastic cup piston actuator. , can be widely used in piston actuators using fluoroplastic cups in aviation fuel control systems, and can also be used in other series of products equipped with similar actuators.

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Abstract

The invention relates to improved design for a piston type actuator, in particular to a fluoroplastic leather cup piston type actuator for an aviation fuel control system. In the design, the prior rigid structure of the fluoroplastic leather cup piston actuator is transformed into a flexible structure of the fluoroplastic leather cup piston actuator; based on the prior technical structure, a fit-up gap A is formed by an expansion force spring (5), spring pieces (4), and adjusting washers (1), so that the thickness and the number of the adjusting washers (1) can increase and decrease according to different situations, and further the range for selecting the adjusting washers with different thicknesses is increased, and application range and reliability of the fluoroplastic leather cup piston type actuator is solved and improved, particularly the operation reliability at low temperature.

Description

technical field [0001] The present invention relates to the improved design of the piston actuator, especially the fluorine plastic cup piston actuator used in the aviation fuel control system. In the design of the present invention, the fluorine plastic cup piston actuator is changed from the original "The structure is transformed into a "flexible" structure, which solves and improves the scope and reliability of the fluorine plastic cup piston actuator, especially improves the reliability of low temperature conditions. Background technique [0002] The reliability design of the fluorine plastic cup piston actuator is an important part of the entire accessory design. No matter in the mechanical hydraulic control system or in the numerical control adjustment control system, similar fluorine plastic cup piston actuators are installed. Compared with traditional rubber, fluoroplastic cups have the advantages of long service life, wear resistance and aging resistance, so they a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B15/14
Inventor 程婷冯义祥汤玉武袁林
Owner GUIZHOU HONGLIN MACHINERY
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