Leaf Spring Assemblies

Abstract

The invention discloses a plate spring component which comprises a lower lifting valve plate sleeved with a soft magnetic armature, wherein two parallel plate spring pieces are arranged between the lower lifting valve plate and the soft magnetic armature and are provided with a plurality of interrupted curved grooves. According to the invention, the metal-metal contact can be avoided through applying the spring component in a flow proportioning valve, so as to eliminate mechanical friction force, prolong the service life of the valve and reduce the hysteresis deboost; when the soft magnetic armature is absorbed, up-down elastic deformation of the plate spring pieces is realized under the action of the soft magnetic armature and the lower lifting valve plate, so as to provide a pre-tightening force for the metallic seal surface and a resilience force for closing the valve; and accordingly, the balance of the electromagnetic force and the spring force at different opening positions of a sealing valve cover is realized. Compared with the prior art, the plate spring component has the advantages of simple structure, convenience in assembly, and capabilities of improving the air tightness of the proportioning valve, prolong valve service life of the size, and reducing hysteresis deboost.

Description

technical field [0001] The invention relates to a device capable of providing uniform pre-tightening force and realizing small linear elastic deformation, in particular to a leaf spring assembly. Background technique [0002] At present, in the fields of gas, motor vehicle fuel power and medical equipment that need to supplement and adjust the gas delivery volume, it is inevitable to use proportional valves to adjust the size of the gas flow to obtain a suitable gas volume and air pressure, especially the servo valve. Valves and proportional valves are more commonly used. [0003] Chinese patent document CN201909067U discloses that "a kind of rotary proportional valve" includes a valve core 1a, a valve body 2a, and a valve cover 3a, (see Figure 7-8 ) The bonnet 3a is sleeved on the valve core 1a and connected with the valve body 2a. An air channel 4a is opened in the valve body 2a, and a vent hole 5a is opened in the valve core in cooperation with the air channel 4a. The ai...

AI Technical Summary

Problems solved by technology

Although this proportional valve has the advantages of fast adjustment response speed and convenient operation, the valve core and valve body are in contact with each other during operation. Due to machining errors, the contact surface cannot be made very smooth, so it is easy to generate mechanical friction. If it is used for a long time, the friction between the valve core and the valve body will cause the problem of poor sealing, which will greatly reduce the accuracy of the proportional valve and shorten the service life.

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