1、 What are the different performance characteristics of hydraulic elevator?
When the hydraulic system pipeline breaks and the car stalls and drops, the oil circuit can be cut off automatically. Oil tank oil temperature protection. When the oil temperature in the oil tank exceeds a certain value, the oil temperature protection device sends a signal to suspend the use of the elevator. When the oil temperature drops, the elevator can be started. Heavy load. The power weight ratio of the hydraulic system is large, so the elevator of the same specification can carry large weight. Low noise. The hydraulic system can adopt low-noise screw pump, and the pump and motor can be designed into submersible structure to form a whole pump station, which can greatly reduce the impact of noise. Good explosion-proof performance. The hydraulic elevator adopts low condensation flame retardant hydraulic oil, the oil tank is sealed as a whole, and the motor and hydraulic pump are immersed in the hydraulic oil, which can prevent the combustion of combustible gas and liquid.
2、 What is the principle of hydraulic elevator?
The operation of hydraulic elevator is divided into up and down. When the elevator goes down, open the valve group, and use the pressure difference caused by the self weight of the car [the weight of passengers (goods)] to make the hydraulic oil return to the hydraulic oil tank to realize the downward movement of the elevator. At this time, the hydraulic pump station does not consume work, and the downward speed of the car is controlled by the opening size of the valve group in the hydraulic system. When the elevator goes up, the hydraulic pump station provides the power differential pressure required for the elevator to go up. The valve group in the hydraulic system controls the flow of hydraulic oil in the pump. When the hydraulic oil enters the oil chamber in the cylinder, the hydraulic oil pushes the plunger in the hydraulic cylinder to lift the car, so as to realize the upward movement of the elevator. At this time, the work consumed by the hydraulic pump is the actual work.
3、 What is the internal structure of the hydraulic elevator?
The pressure control system is composed of one-way valve, integrated valve block and hydraulic system control circuit. Its function is to control the running speed of the elevator, receive the input signal and operate the start, operation and stop of the elevator. Hydraulic cylinder and support system the function of hydraulic cylinder and support system is to directly drive the movement of lift car. Hydraulic cylinder: converts the pressure energy output by the hydraulic system into mechanical energy, and drives the movement of the lift car through the mechanical movement of the plunger.) Support system: there are great differences in supporting mechanical components according to different support methods. The guide system is composed of guide shoes, guide rails and guide rail supports. Its function is to limit the freedom of movement of the car so that the car can only be raised along the guide rails.
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