1 Cushion mechanism of oil cylinder

An adjustable fixed throttling cylinder that uses the buffer plunger and throttle valve together. When the buffer plunger 7 enters the buffer chamber, the oil in the chamber is forced to flow out through the throttle port 2. Due to the large liquid resistance of the throttle port, a higher buffer pressure is formed in the buffer chamber to realize the deceleration and buffering of the cylinder piston. Adjusting the opening of orifice 2 can change the buffering speed of the piston. Sub L 3 (connected to the check valve) is the one-way oil inlet when the piston moves to the right, and the check valve 5 is the buffer chamber to the high pressure limit valve.  

2 Performance analysis of buffer device

Oil cylinder manufacturer Buffer principle: set the plunger entering the buffer position to be "(left is positive, right is negative), and the movement speed is" relative to the initial buffer position. When it continues to move to the left dx for a small displacement, the mechanical energy change value dE2 of the moving parts of the oil cylinder will be fully converted into the hydraulic energy change value dE1 of the oil in the buffer chamber after buffering (energy conservation principle).  

3 Summary of buffer mechanism

For the fixed throttling buffer device, the impact pressure is very large at the beginning, so the maximum pressure resistance of the buffer device should be considered in the design. After entering the buffer, the buffer effect decays quickly, which is suitable for the occasions with low piston speed and low load (inertia) mass. Its advantages are compact and simple structure, and it is widely used in hydraulic drive cylinders.

Hydraulic cylinder manufacturer When the dump truck moves, the electromagnetic valve is disconnected; When the shift valve is in the falling state, when the car needs to be lifted, first connect the electromagnetic valve. At this time, the power takeoff drives the hydraulic oil pump to start from the gear connection of the gearbox, and then operate the shift valve to lift. Connect the high-pressure oil with the lifting cylinder, and the lifting cylinder lifts the car, places the shift valve in the middle position, closes the high-pressure oil circuit, and the cylinder maintains the lifting state.

Put the change-over valve in the falling state, discharge the high-pressure oil from the lifting cylinder, and the carriage falls. Then turn off the electromagnetic valve to stop the power takeoff. Oil cylinder processing belongs to deep hole processing, and ready-made steel pipes can be used. After welding, heat treatment should be carried out first to make the materials meet the required mechanical properties. Deep hole processing equipment must be used during processing, and grinding allowance shall be reserved during finishing to extend the inner hole to the size on the deep hole grinding machine.

Generally, oil cylinder processing plants do not conduct cold drawing of steel pipes again, and mainly purchase ready-made pipes. If it is a small oil cylinder and the cylinder head is fixed by pull rods at both ends, and there is no requirement for material hardness, steel pipes can be used for direct processing and grinding. Oil cylinder manufacturer The single piston rod double acting oil cylinder is that the single piston rod reciprocates in the oil cylinder and is forced by the medium (hydraulic oil, compressed air) on both sides.