Working Principle
Hydraulic station is also called hydraulic pump station. The motor drives the oil pump to rotate. The pump absorbs oil from the tank and pumps oil, converting mechanical energy into pressure energy of hydraulic oil. The hydraulic oil is controlled by the hydraulic valve through the integrated block (or valve combination) to achieve direction, pressure, After the flow is adjusted, it is transmitted to the oil cylinder or oil motor of the hydraulic machine through the external pipeline, thereby controlling the change of the direction of the hydraulic machine, the size of the force, the start and stop of the equipment, and the speed of the speed, and promotes various hydraulic machines to do work.
Installation Location
It can be flexibly deployed according to the mechanism form and installation location of the pump device:
1) Top-mounted vertical type: The pump device is installed vertically on the fuel tank cover, mainly used for quantitative pump systems.
2) Top-mounted horizontal type: The pump device is installed horizontally on the fuel tank cover and is mainly used in variable pump systems to facilitate flow adjustment.
3) Side-mounted type: The pump device is installed horizontally on a separate foundation next to the fuel tank. The side-mounted type can be equipped with a backup pump. It is mainly used for systems with a fuel tank capacity of 250 liters and a motor power of 7.5 kilowatts or more.
Structure Type
1) Piston type
Single piston rod hydraulic cylinders have a piston rod on only one end. As shown in Figure 3 is a single-piston hydraulic cylinder. The inlet and outlet ports A and B at both ends can pass pressure oil or return oil to achieve two-way movement, so it is called a double-acting cylinder.
2) Plunger type
① The plunger hydraulic cylinder is a single-acting hydraulic cylinder that can only move in one direction by hydraulic force. The return stroke of the plunger depends on other external forces or the weight of the plunger;
② The plunger is only supported by the cylinder liner and does not contact the cylinder liner. This makes the cylinder liner very easy to process, so it is suitable for long-stroke hydraulic cylinders;
③The plunger is always under pressure during operation, so it must have sufficient stiffness;
④The weight of the plunger is often large, and it is easy to sag due to its own weight when placed horizontally, causing unilateral wear of the seals and guides, so it is more advantageous to use it vertically.
3) Telescopic
The telescopic hydraulic cylinder has a two-stage or multi-stage piston. The order of the piston extension in the telescopic hydraulic cylinder is from large to small, while the order of no-load retraction is generally from small to large. The telescopic cylinder can achieve a longer stroke, but has a shorter length when retracted, making the structure more compact. This type of hydraulic cylinder is often used in construction machinery and agricultural machinery.
4) Swing type
The swing hydraulic cylinder is an actuator that outputs torque and achieves reciprocating motion. It is also called a swing hydraulic motor. There are two forms: single blade and double blade. The stator block is fixed to the cylinder, while the blades and rotor are connected together. According to the direction of oil inlet, the blades will drive the rotor to swing back and forth.
