Braking cylinder of braking device of railway wagon

Abstract

The invention discloses a braking cylinder of a braking device of a railway wagon, which mainly solves the problem that the traditional braking cylinder has the disadvantages of large wear loss of components, poor sealing performance and poor working stability. The braking cylinder mainly comprises a cylinder body, a piston arranged in the cylinder body and a piston push rod rigidly connected with the piston together, wherein a flange elbow for air intake and air exhaust is arranged at the bottom of the cylinder body; a release spring is arranged between the piston and a cylinder cover; the upper end of the piston push rod extends out of the cylinder cover; an integral type membrane is covered on the working end surface of the piston; and a sealed space is formed between the integral type membrane and the bottom of the cylinder body, thus the braking cylinder has self-sealing performance. The braking cylinder also has the function of automatically marking the stroke of the piston of the braking cylinder by arranging stroke marks. The invention has the advantages of simple structure, good sealing effect, less wear loss, high reliability and long service life.

Description

technical field [0001] The invention relates to a railway freight car braking device, in particular to a brake cylinder of a railway freight car braking device. Background technique [0002] With the rapid development of railway transportation, the requirements for the braking devices of railway wagons are also getting higher and higher. The brake cylinder is one of the key components of the brake device, and its performance has a great influence on the reliability and service life of the entire brake device. At present, although the main brake cylinders used in domestic railway freight car braking devices can basically meet the service life requirements, there are still the following defects in terms of reliability: [0003] First, the piston rod of the existing brake cylinder adopts an extrusion-type sealing structure, and the piston rod rubs against the sealing assembly back and forth during motion, which not only causes great wear and poor sealing performance, but also ...

AI Technical Summary

Problems solved by technology

[0003] First, the piston rod of the existing brake cylinder adopts an extrusion-type sealing structure, and the piston rod rubs against the sealing assembly back and forth during motion, which not only causes great wear and poor sealing performance, but also affects the service life of the sealing assembly

At the same time, this structure does not have lateral flexibility

Since the basic brake lever connected with the brake cylinder has the characteristics of arc motion, the parts connected with it will produce lateral displacement, so that the piston rod cannot be directly connected with the basic brake lever, and a push rod needs to be added inside the piston rod. The rod is indirectly connected to the basic brake lever through the push rod, so that there needs to be enough clearance between the outer wall of the push rod and the inner wall of the piston rod to meet the requirements of the circular motion of the basic brake lever, so that the structure becomes relatively complicated

[0004] Second, the existing brake cylinder piston is mainly sealed with a Y-shaped sealing ring, which has high requirements for assembly

Moreover, the Y-shaped sealing ring needs to realize the sealing between the inner wall of the cylinder and the sealing between the piston and the sealing effect is difficult to control

[0005] Its three, the cylinder inner surface of existing brake cylinder is too smooth, on the one hand cylinder grease is easy to run off, causes cylinder block lubricating effect to deteriorate, and Y-type sealing ring wears and teares aggravation, forms leakage; Low, small foreign matter entering the brake cylinder can easily cause scratches or rust on the inner wall of the cylinder and the sealing ring during the reciprocating movement of the piston of the brake cylinder, which will also cause leakage and eventually reduce the reliability of the brake cylinder , thus shortening the service life

[0006] Fourth, whether the piston stroke of the existing brake cylinder meets the requirements needs to be measured manually with a ruler, which greatly restricts the work efficiency of the train inspection personnel and prolongs the train inspection operation time

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