Constant-pressure exhaust braking method and constant-pressure exhaust braking butterfly valve

Abstract

The invention discloses a constant-pressure exhaust braking method and a constant-pressure exhaust braking butterfly valve by employing the method. A gas inlet end of a valve body is fixed at an exhaust port of a motor, a cylinder pulls a rotary shaft to enable a valve sheet to be parallel with a central line of an exhaust channel, the back pressure is not produced by motor exhaust at the time, and the normal operation of the motor is not affected; when the motor is required to be bracked, the cylinder pushes the rotary shaft to enable the valve sheet to seal the exhaust channel, the back pressure is produced by motor exhaust, the motor begins to be braked, and when the back pressure of the motor reaches a set value, a piston is ejected by gas pressure, and gas is discharged through a gas outlet; and when the back pressure of the motor is lower than the set value, the piston is pushed downwards by a pressure spring, so that a channel between a gas inlet and the gas outlet is sealed, the back pressure rise to achieve the set value, and constant-pressure exhaust braking is achieved. According to the constant-pressure exhaust braking method and the constant-pressure exhaust braking butterfly valve, the back pressure set value can be adjusted as required, the back pressure is kept constant, maintenance of products is facilitated, and the braking effect is good.

Description

technical field [0001] The invention relates to an exhaust brake, in particular to a constant pressure exhaust brake method and a constant pressure exhaust brake butterfly valve implementing the method. Background technique [0002] The exhaust brake is an auxiliary braking device for vehicles. It can control the vehicle within a certain safe speed range without using or using less traditional friction brakes, prevent vehicle brake failure, and ensure driving safety. Pneumatic brake butterfly valve is a kind of vehicle auxiliary braking device. [0003] The existing constant pressure exhaust brake butterfly valve has a complex structure, and the design is not reasonable and perfect, the sealing performance of the product is not good, and the pressure relief is not sensitive enough, which often leads to insufficient constant back pressure, which affects the braking effect, and the structure is too complicated , leading to difficulties in maintenance and affecting work effici...

AI Technical Summary

Problems solved by technology

[0003] The existing constant pressure exhaust brake butterfly valve has a complex structure, and the design is not reasonable and perfect, the sealing performance of the product is not good, and the pressure relief is not sensitive enough, which often leads to insufficient constant back pressure, which affects the braking effect, and the structure is too complicated , leading to difficulties in maintenance and affecting work efficiency

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