What Is a Hydraulic Drop?

Hydraulic shock absorber (Hydraulic shock absorber) relies on hydraulic damping to buffer and slow down the objects acting on it to play a certain degree of protection. It is suitable for lifting and transporting, elevators, metallurgy, port machinery, railway vehicles and other mechanical equipment, and its role is to prevent hard collisions during the work from causing damage to the mechanism.

Hydraulic shock absorber is a kind of energy-consuming shock absorber. For fast and high speed elevators. There are two types of hydraulic buffers:

(1) Hydraulic buffer with overflow hole on the inner wall of the cylinder. When the collision plate at the bottom of the car hits the rubber buffer contact at the top of the bumper piston, the contact absorbs the first impact along with the auxiliary spring. Throttle oil holes on the wall enter the external oil storage tank. As the piston descends, the throttle holes on the wall of the cylinder gradually decrease and shrink, reducing the total area of the energy saving holes and increasing the throttling effect of the oil, so sufficient oil is produced. Press to slow down the car movement until it stops smoothly. When the car is lifted and the buffer is loaded on the cylinder, the spring resets the piston, and the oil flows back from the oil storage tank to the cylinder through the orifice, and the buffer is automatically reset for the next use.

(2) Hydraulic buffer with tapered column and annular hole. When the car hits the bumper and bumper, the plunger is pushed down into the oil cylinder, the oil flows into the inner cavity of the hollow plunger through the annular hole, and the cone of the flow is controlled. When the plunger moves downward, the opening of the annular hole gradually decreases, resulting in a constant braking force. When the car is lifted toward Bu, the spring located in the plunger resets the plunger to its working state. ^[1]

Usually a small hydraulic buffer is composed of a hydraulic cylinder, a piston, a piston rod, a hydraulic cylinder head, a buffer spring and a sealing element, as shown in FIG. 1.

The hydraulic cylinder is connected to the gun body. During the shooting process, the gun body drives the hydraulic cylinder to sit back together. The piston rod of the bumper is connected to the shoulder rest and abuts the shoulder of the shooter. The cavity formed by the piston rod and the hydraulic cylinder is filled with hydraulic oil. . After firing, the gun body sits back under the combined force of the barrel. The shoulder rest can be considered fixed. The hydraulic cylinder moves backwards relative to the piston rod. The volume of the I cavity decreases and the liquid pressure increases, forcing the hydraulic oil to pass between the hydraulic cylinder and the piston. The annular leak flows into the II cavity, and the buffer spring is compressed to store the re-entry energy. Due to the area of the annular leak . It is much smaller than the area of the piston, so the liquid flows at a high speed through the annular leak, generating a large resistance, which has a cushioning effect on the recoil of the gun body. When the back seat energy of the gun body is exhausted, the gun body is seated to the rear. At this time, the buffer spring is relaxed, pushing the gun body back to the position before firing, the piston rod moves backward relative to the hydraulic cylinder, and the hydraulic oil passes through the annular leak Convex, flow back to I cavity. The installation position of the hydraulic buffer on the large-caliber sniper rifle is shown in Figure 2. ^[2]

A. The hydraulic shock absorber should be installed horizontally and the impact should be less than 1 degree.

B. The ambient temperature is 22-80 degrees Celsius.

C. Do not invert to prevent hydraulic oil from overflowing.

D. The inventory should be kept in a ventilated place, and the humidity should be below 80%.

E. Pay attention to fire prevention and do not place it at the source of fire.