Understand the hydraulic pump station

Structural installation

It can be divided into:

1) Upper vertical: the pump unit is vertically installed on the oil tank cover plate, mainly used for the constant displacement pump system.

2) Upper horizontal type: the pump unit is horizontally installed on the cover plate of the oil tank, mainly used for variable displacement pump system to facilitate flow regulation.

3) Side mounted pump: the pump unit is horizontally installed on a separate foundation beside the oil tank. The side mounted pump can be equipped with a standby pump, mainly used for systems with oil tank capacity of 250 liters and motor power of more than 7.5 kilowatts.

Cooling mode

1) Natural cooling: It is cooled by the heat exchange between the oil tank itself and the air. It is generally used for systems with oil tank capacity less than 250 liters.

2) Forced cooling: cooler is used for forced cooling, generally used for systems with oil tank capacity greater than 250 liters. The main technical parameters of the hydraulic station are the effective oil storage measurement of the oil tank and the motor power.

The integrated block can be configured according to the system or without integrated block; Cooler, heater and accumulator can be set; It can be equipped with electrical control device or without electrical control device.

Fuel tank type

1) Ordinary steel plate: the box is welded with 5MM-6MM steel plate, and the panel is welded with 10-12MM steel plate. If there are too many openings, they can be thickened or reinforced appropriately.

2) Stainless steel plate: 304 stainless steel plate is selected for the box body with a thickness of 2-3 mm, 304 stainless steel plate is used for the panel with a thickness of 3-5 mm, and the load-bearing part is added with reinforcing ribs.

3) It is difficult to realize the internal rust prevention treatment of ordinary steel plate oil tank. Rust entering the oil circulation system will cause many failures. The oil tank with all stainless steel design solves this industry problem.

structural style

1) Piston type

The single piston rod hydraulic cylinder only has a piston rod at one end. As shown in the figure, it is a single piston hydraulic cylinder. The inlet and outlet oil ports A and B at both ends can be connected with pressure oil or return oil to realize two-way movement, so they are called double acting cylinders.

2) Plunger type

① The plunger type hydraulic cylinder is a single acting hydraulic cylinder, which can only achieve movement in one direction by hydraulic pressure, and 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 with the cylinder liner, so the cylinder liner is very easy to process, so it is suitable for making a long stroke hydraulic cylinder;

③ The plunger is always under pressure during operation, so it must have sufficient stiffness;

④ The weight of plunger is often large, and it is easy to sag due to its own weight when it is placed horizontally, causing unilateral wear of seals and guides, so its vertical use is more favorable.

3) Telescopic

The telescopic hydraulic cylinder has two-stage or multi-stage pistons. The sequence of piston extension in the telescopic hydraulic cylinder is from large to small, while the sequence of no-load retraction is generally from small to large. The telescopic cylinder can achieve a long stroke, while the retracted length is short and the structure is compact. This kind of hydraulic cylinder is commonly used in construction machinery and agricultural machinery.

4) Swinging type

Swing type hydraulic cylinder is an actuator that outputs torque and realizes reciprocating motion, also known as swing type hydraulic motor. There are two types: single blade and double blade. The stator block is fixed on the cylinder block, while the blade and rotor are connected together. According to the oil inlet direction, the blade will drive the rotor to and fro swing.