Sealing structure of valve and electric control throttle valve with same

Abstract

A sealing structure of a valve comprises a valve body, a valve element, a sealing ring, an installation support, an elastic ring, a wave spring and a pressure applying part. The valve element is rotationally arranged on the valve body. The sealing ring is installed on the installation support, and the installation support is provided with a fluid through hole in the axial direction. The elastic ring is arranged between the installation support and the wave spring, the front end surface of the elastic ring is in sealed contact with the rear end of the installation support, and the outer peripheral surface of the elastic ring is in sealed contact with the inner surface of the valve body. The wave spring is in a corrugated pipe shape, and the front end of the wave spring abuts against the rear end of the elastic ring. The pressure applying part abuts against the rear end of the wave spring so as to apply axial pressure to the wave spring, and the axial pressure is transmitted to the sealing ring through the elastic ring and the installation support so that the sealing ring can be tightly attached to the surface of the valve element. A good sealing effect can also be maintained in a high-low temperature environment and under the condition that assembly and part size accumulative deviation exists.

Description

technical field [0001] The present invention relates to valve technology. Background technique [0002] In order to reduce specific fuel consumption (CO 2 emission), shorten the engine warm-up time, and improve the reliability of the engine, it is necessary to use an electronically controlled throttle valve for thermal management of the engine. The electronically controlled throttle valve is usually installed on the engine block, which adopts a mechanical and electrical integration design, and the system is compact and highly integrated. It precisely controls the rotation angle of the low-resistance ball valve through the high-efficiency actuator driven by the DC motor and the high-precision inductive position sensor, so as to realize the on-demand control of the flow in each branch of the cooling system. Through precise temperature control, the electronically controlled throttle valve can improve the working efficiency of the engine and other components, thereby minimizin...

AI Technical Summary

Problems solved by technology

Since the sealing ring will harden at high and low temperatures, and the compression force varies greatly with the size, the sealing effect will deteriorate under high and low temperature conditions

In addition, the existing electronically controlled throttle valve has no assembly direction adjustment structure. In the case of large cumulative deviations in assembly and parts, the central axis of the sealing ring and the central axis of the through hole of the valve core will not be on a straight line. , leading to seal failure

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