The application of hydraulic system is very wide, it exists in all kinds of machines in our life. One of the elevators we often use and are familiar with is the hydraulic system. In our daily life, we often hear some news about the elevator hurt people, so the safety of the elevator is very important. The working efficiency and comfort of the elevator largely depend on its speed regulation performance. Compared with the ordinary elevator, the hydraulic elevator with hydraulic transmission runs smoothly, the hydraulic oil has the buffering effect, and can realize the stepless speed regulation, the elevator running speed changes gently. And large load, simple structure, small size, good safety, high reliability, easy maintenance. Therefore, it has been widely used. However, due to the leakage of hydraulic oil and low transmission efficiency, the influence of temperature on hydraulic oil is great. Therefore, more perfect design improvements are needed to make it more suitable for life.
Hydraulic elevator is through the hydraulic power source, the oil pressure into the cylinder to make the plunger linear movement, directly or indirectly through the wire rope to make the bridge car movement elevator. Hydraulic elevator is a mechanical, electrical, electronic, hydraulic integration products, by relatively independent but interrelated system. For example, the pump station system is composed of motor, oil pump, oil tank and auxiliary components, and the hydraulic system is composed of integrated valve block, check valve, speed limit cut-off valve and oil cylinder. And the guiding system, like the function of the traction elevator, restricts the freedom of movement of the bridge car, bears the load of the partial load and the safety clamp action to the indirect jacking hydraulic elevator, and the top of the plunger with pulley should also be guided by the guide rail. The structure and function of the car are the same as that of the traction elevator, but the axle car structure of the side jacking hydraulic elevator is different due to the different stress conditions. Finally, the door system: the same as the electric elevator, the hydraulic elevator can be divided into direct jacking and indirect jacking according to the way of jacking. Direct jacking means that the plunger is directly connected with the bridge car structure, and the movement speed of the plunger is the same as the running speed of the car. The connection between the plunger and the axle car can be in the middle of the bottom of the car or on the side.
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