Working principle and maintenance of electric hydraulic pump

An electric hydraulic pump is a hydraulic component that provides pressurized liquid and is also a type of pump. Its function is to convert the mechanical energy of an electric motor or internal combustion engine into the pressure energy of a liquid. He is also an energy device that provides hydraulic oil to hydraulic transmission systems. If you want to understand the electric hydraulic pump, you should first understand the working principle of the electric hydraulic pump.

　　 Working principle of electric hydraulic pump

Electric hydraulic pumps all rely on the principle of sealing volume change to work, so they are generally called positive displacement hydraulic pumps. The plunger is installed in the cylinder to form a sealed volume a. The plunger is always pressed against the eccentric wheel under the action of the spring. The prime mover drives the eccentric wheel to rotate the plunger to reciprocate, so that the size of the sealing volume a alternately changes periodically. When a changes from small to large, a partial vacuum is formed, so that the oil in the tank is under atmospheric pressure, and a check valve is opened through the oil suction pipe to enter the oil chamber to achieve oil absorption; on the contrary, when a changes from large to small, the a cavity is full. The oil will flow into the system by pushing the check valve open to achieve oil pressure. In this way, the hydraulic pump converts the mechanical energy input by the prime mover into the pressure energy of the liquid. The prime mover drives the eccentric wheel to continuously rotate, and the hydraulic pump continuously sucks and presses oil.

　　 Maintenance and repair of electric hydraulic pump

1. Daily check the fasteners of the product, such as: whether the screws are loose, and check whether the installation pipeline interface leaks oil.

2. Check the cleanliness of the oil seal. It is often necessary to clean the oil seal to prevent affecting the service life of the machine.

3. It is recommended to replace the hydraulic oil after working for 500 hours for the first time. The maximum period of hydraulic oil replacement is 2000 hours, and the maximum period of replacement with air filter is 500 hours.

4. In order to optimize the service life of hydraulic components, please replace the hydraulic oil and filter regularly. Hydraulic pollution is the main cause of damage to hydraulic components. Please keep the hydraulic oil clean during daily maintenance and repairs.

5. Daily use should check whether the oil level of the hydraulic oil tank meets the requirements, and at the same time check the water content of the hydraulic oil and whether there is abnormal smell. When the hydraulic oil contains water, the oil is turbid or milky, or water droplets precipitate at the bottom of the tank. When the oil has a foul odor, it indicates that the operating temperature of the hydraulic oil is too high. When the above situation occurs, please replace the hydraulic oil immediately, and find out the cause of the problem and solve it. Check the vehicle daily for leaks.

6. During trial operation and operation, the axial plunger pump element must be filled with hydraulic oil and exhausted. After a long period of shutdown, oil injection and exhaust operations are required because the system may drain oil through hydraulic lines.

7. The pollution has fatal damage to the hydraulic components, and the working environment for maintenance and repair must be clean. Before starting maintenance or repair, thoroughly clean the pump or motor.

8. Regularly replace the hydraulic oil and filter of the system according to the recommended standards to ensure the system runs efficiently and safely, and replace the wearing parts regularly.

The working principle of electric hydraulic pump and related knowledge content of maintenance and maintenance are introduced here for friends. Check the voltage before using the electric hydraulic pump, and check whether the plug and socket are connected properly. Connect one end of the high-pressure fuel pipe to the connector of the machine, and the other end to the type of tool you need. And pay attention to whether the quick connectors on both ends are locked in place. You must force the quick connectors to the bottom and screw in the jacket nut without loosening.