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The hydraulic cylinder output speed of the motorcycle lift actuator decreases by a negative number

Motorcycle elevator is a kind of lifting mechanical equipment. The motorcycle lift system is driven by a hydraulic pump station, so it is also known as a hydraulic motorcycle lift. Motorcycle lifts are used to transport goods between high-rise buildings. Special hydraulic motorcycle lift products are mainly used for cargo transportation between various working floors; The three-dimensional garage and underground garage are lifted by cars. The hydraulic system of this product is equipped with fall prevention and overload safety protection devices. Operating buttons can be set on each floor and lift table to achieve multi-point control. This product has a solid structure, large bearing capacity, stable lifting, simple and convenient installation and maintenance, and is an economic and practical ideal cargo conveying equipment for replacing elevators in low-rise buildings.

In addition to the safety device with traditional traction elevators, motorcycle elevators are also equipped with a safety valve to prevent excessive system pressure during upward movement.
Emergency manual valve: When the power supply fails, the car can be lowered to a nearby floor to open the door.
Manual pump: When the system fails, the manual pump can be operated to pump high-pressure oil and lift the car to a nearby floor position.
Pipeline rupture valve: When the hydraulic system of the railway chain motorcycle elevator breaks the stall of the car, the oil circuit can be automatically cut off and stop descending.
Tank oil temperature protection: When the oil temperature in the tank exceeds the standard setting value, the oil temperature protection device sends a signal to suspend the use of the elevator and start the elevator when the oil temperature drops.
Establish a velocity rigidity analysis formula for the elevator circuit: the flow into the hydraulic cylinder of the motorcycle elevator, that is, the flow through the one-way throttle valve, is the flow through the throttle valve; The shape of the throttle port of the throttle valve is related to the viscosity of the hydraulic oil; Enter the orifice flow area (height without throttling); Hydraulic pump outlet pressure; P1 is the inlet pressure of the hydraulic cylinder, increasing the plunger area of the hydraulic cylinder; The index determined by the shape of the throttle hole and the speed type of the speed control ring indicate that when the throttle valve area is constant, the output speed of the hydraulic cylinder will vary with the load.
The impact of load changes on speed is expressed by the speed stiffness T: As the load increases, the output speed of the hydraulic cylinder of the motorcycle lift actuator decreases by a negative number; To obtain a positive number, add a minus sign. When replaced with a motorcycle elevator, the imported throttle speed regulating circuit has a greater speed stiffness and a better speed stability of the hydraulic circuit; The lifting hydraulic circuit consists of:. Oil pump safety valve, reversing valve, reversing valve, one-way throttle valve (without throttle), lift cylinder.
Increasing the oil supply pressure to increase the effective working area of the hydraulic cylinder can improve the speed stiffness; When the load is constant, the speed stiffness is good at low speeds, and when the load changes, the speed stiffness of the load is good; When the load is constant, the throttle valve is constant. The smaller the valve port, the higher the system speed stiffness. Conversely, the larger the throttle opening area, the lower the feed.