Introduction to the structure of the energy storage unit brake cylinder
The main component of the composite energy storage brake is an energy storage unit brake cylinder that is integrated with the unit brake cylinder. Mainly composed of brake cylinder, brake shoe (sheet) gap adjuster and energy storage brake part, the main components include bearing box, pull sleeve, single row radial ball bearing, one-way thrust ball bearing, ratchet, manual relief valve, cylinder Body, nylon ring, piston, spring, spring cover, spring box, front cover, piston rod, piston pad, piston head, elastic pad, large screw, bellows, nut, positioning bolt and small screw. The main components of the energy storage brake are piston, spring, spring cover, single row radial ball bearing, ratchet, manual relief valve, small screw, pull sleeve, one-way thrust ball bearing and so on. The composite energy storage unit brake cylinder has the characteristics of compact structure and small size. The energy storage brake in the compound unit brake cylinder also has a charge relief position, an exhaust brake position and a manual relief position. (l) Inflatable relief position. The spring brake is inflated, and the piston compresses the spring and the spring to move to the left under the push of the pressurized air, and drives the components such as the pull sleeve, the small screw and the nut to move together, if the initial state of the small screw is not completely retracted into the nut, at this time small The screw, the ratchet, the one-way thrust ball bearing and the clockwise rotation under the push of the pull sleeve make the small screw fully retract into the nut, and when the piston moves to the maximum stroke, it is in the inflation relief position. When the train is in normal operation, the energy storage brake should always be in the inflation relief position. In this position, the brake cylinder can achieve normal braking and relief. (2) Exhaust brake position. When the air pressure in the spring brake is lowered, the spring pushes the piston to the left to drive the components such as the pull sleeve, the small screw and the nut to move together. At this time, the small screw is restrained by the ratchet, and the nut cannot rotate. Push the piston to move to the left, the brake shoe (plate) is pressed on the wheel tread (brake surface), the spring brake is in the exhaust brake position, and the distance the piston moves to the left depends on the brake shoe (plate) and the wheel. The gap value of the moving disk). The pressure of the brake shoe (sheet) is related to the decrease of the air pressure in the energy storage brake. When the pressure air is completely discharged, the brake shoe (sheet) pressure reaches the maximum value. In this position, the brake cylinder can only achieve braking action, so it must be ensured that the energy storage brake is always in the inflation relief position during normal train operation. Hydraulic Support System Seals
The seal of the Saifu lever hydraulic support is composed of a sealing ring, a retaining ring, a guide ring and a dustproof ring.
Hydraulic Support System Seals,hydraulic support,Hydraulic Support System ,Hydraulic Power Unit Safe Seal Technology Co., Ltd. , https://www.jssafeseal.com
Hydraulic support seal
Prevent leaks. Used in the category of hydraulic supports: drum ring, composite seal, mountain ring, bud ring, O-ring, etc. Generally rubber, polyurethane material.
Used together with the sealing ring, it has the functions of anti-crowding, guiding and reducing wear. It is generally made of phenolic XII cloth, 45% copper powder mixed with filled PTFE and other materials.
Guide ring:
It is a part used on the jack piston or piston rod to support the movement of the piston or piston rod. It can prevent the piston or piston rod from direct contact and friction with the cylinder during the movement, and protect the cylinder and the piston or piston. The rod is not damaged. Generally, it is polyoxymethylene, polytetrafluoroethylene and other materials.
Dust-proof ring: the main function is to go out and reciprocate the piston rod to expose the impurities attached to the outer surface of the cylinder, so as to prevent impurities such as external dust from entering the inside of the sealing mechanism. Generally rubber, polyurethane and other materials.