1. What is the hydraulic pump of the forklift?
Forklift hydraulic pumps and hydraulic motors are energy conversion devices in hydraulic system accessories. The forklift hydraulic pump converts the mechanical energy of the original rotating force into hydraulic energy, which belongs to the forklift power element.
2. What is the role of the forklift hydraulic pump?
The hydraulic motor of the forklift converts the rotational motion energy into the hydraulic mechanical energy of the gear mesh, which is the actuator used to push the hydraulic cylinder. The hydraulic pumps used in the hydraulic transmission rely on the volume change of the sealed working oil chamber to realize the oil absorption and discharge, so it is also called the volumetric forklift hydraulic pump. Forklift hydraulic pumps can be divided into vane type, gear type, plunger type and other types. As far as the working principle is concerned, the hydraulic pump of the forklift is irreversible, which is mainly determined by the position of the oil inlet and discharge of the hydraulic pump of the forklift. Any kind of positive displacement forklift hydraulic pump can be used with hydraulic motor. However, due to the different working conditions, in order to improve its performance, some measures have been taken in the structure.
3. Common failures of forklift hydraulic pumps
Common failures of forklift hydraulic pumps
1. The working oil deteriorates due to entering the dirt:
Dirt will cause wear and corrosion of parts, especially for finished parts, they will scratch the inner wall of the rubber hose, oil seal ring and packing, and these things will cause more dirt to enter the system after damage There is a vicious cycle of damage.
2. Overheating
Overheating will quickly oxidize the oil, and the oxidation will release insoluble resins, sludge and acids, etc., and these substances accumulate in the oil to cause accelerated wear and corrosion of the parts, and they adhere to the surface of the finished parts. The parts will lose their original function. The oil becomes thinner due to overheating and it will make the transmission work slower.
3. Enter the air:
In addition to causing overheating when the air enters the oil, a considerable amount of air will be dissolved in the oil under pressure. If about 10% of the compressed volume belongs to dissolved air, foam will form when the pressure drops. When the working hydraulic cylinder is decompressed and returned to the oil, the oil with foam will form a "sea"
The property of "sponge". In addition, the inclusion of many foams in the oil will increase the total volume and will cause oil spillage in the tank or oil reservoir.
4. the maintenance method of the forklift hydraulic pump failure:
1. Disassemble the screw of the back cover of the hydraulic pump and remove the back cover;
2. Check the gears inside, whether there is serious wear on the cylinder wall;
3. Replace the copper repair kit in the hydraulic pump, and replace the high-pressure oil seal on the front shaft of the hydraulic pump;
4. After the replacement is completed, install it in the reverse order, and then install the vehicle to test and check the working condition, and then use it after it is normal.
