lassification of ultra-thin hydraulic jacks:
The hydraulic ultra-thin hydraulic jack is suitable for various lifting operations with small lifting heights. The hydraulic ultra-thin hydraulic jack is composed of oil cylinder, oil pump, oil storage tank, piston, crank, joint and other main parts.
When the hydraulic ultra-thin hydraulic jack is working, as long as the crank handle is reciprocated, the manual oil pump continuously presses oil into the oil cylinder. Due to the continuous increase of oil pressure in the oil cylinder, the piston and the heavy objects on the piston are forced to move upward together. When the oil return valve is opened, the high-pressure oil in the oil cylinder flows back to the oil storage cavity, and the heavy object and the piston also fall together. If the amount of oil in the manual pump body is insufficient, the N33# hydraulic oil must be added to the pump before it can work. The screw jack manufacturers in china reminded this.
Ultra-thin hydraulic jacks are divided into hydraulic ultra-thin hydraulic jacks, electric ultra-thin hydraulic jacks, electro-hydraulic ultra-thin hydraulic jacks, synchronous ultra-thin hydraulic jacks, ultra-thin ultra-thin hydraulic jacks, manual hydraulic ultra-thin hydraulic jacks, self-locking ultra-thin Hydraulic jacks, etc., hydraulic ultra-thin hydraulic jacks are compact in structure, stable in work, and self-locking, so they are widely used.
Working principle of hydraulic ultra-thin hydraulic jack:
The most basic principle of the hydraulic ultra-thin hydraulic jack is the Pascal principle, which means that the pressure across the liquid is the same. In this way, in a balanced system, the pressure on the smaller piston is lower, and the larger piston is applied. The pressure is also relatively large, which can keep the liquid still. Therefore, through the transfer of liquid, different pressures on different ends can be obtained, so that a transformation can be achieved. Therefore, the ultra-thin hydraulic jacks that we commonly see use this principle to achieve force transmission.
A complete hydraulic system consists of five parts, namely power components, executive components, control components, auxiliary components and working medium.
The function of the power element is to convert the mechanical energy of the prime mover into the pressure energy of the liquid. The power element refers to the hydraulic pump in the hydraulic system, which provides power to the entire hydraulic system. The structure of hydraulic pump generally includes gear pump, vane pump, plunger pump and screw pump.
The function of the actuator is to convert the pressure energy of the liquid into mechanical energy and drive the load for linear reciprocating motion or rotary motion. The executive components are hydraulic cylinders and hydraulic motors.
Control components (ie various hydraulic valves) control and regulate the pressure, flow and direction of the liquid in the hydraulic system
The screw jack manufacturers in china also introduced the function.
According to different control functions, hydraulic valves can be divided into pressure control valves, flow control valves and directional control valves. Pressure control valves are further divided into relief valves (safety valves), pressure reducing valves, sequence valves, pressure relays, etc.; flow control valves include throttle valves, regulating valves, diversion and collector valves, etc.; direction control valves include check valves, Hydraulic control check valve, shuttle valve, reversing valve, etc. According to different control methods, hydraulic valves can be divided into on-off control valves, fixed value control valves and proportional control valves.
Auxiliary components include accumulators, filters, coolers, heaters, oil pipes, pipe joints, oil tanks, pressure gauges, flow meters, sealing devices, etc. They play auxiliary functions such as connection, oil storage, filtration and measurement of oil pressure. Refer to "Hydraulic Transmission" and "Hydraulic System Design Series".
Working medium refers to the hydraulic oil or emulsion in various hydraulic transmissions. There are various types of mineral oil, emulsion and synthetic hydraulic oil. The hydraulic system realizes movement and power transmission through it.