Jining Donghong Machinery Co., Ltd

JM1 Hydraulic motor

1. purpose and scope of application

It can be matched with various pumps, valves and other hydraulic components to form a hydraulic transmission device, which is used for various fixed or walking hydraulic mechanical equipment that need to perform rotating motion.

2. structure principle and characteristics

The working principle is the movement of a plunger cylinder, which is equivalent to a crank connecting rod mechanism. Under the action of hydraulic pressure, the plunger cylinder with pressure oil generates thrust P on the plunger and acts on the crankshaft eccentric through the connecting rod. Due to the eccentricity e, the tangential force F rotates the output shaft and drives the valve distribution shaft to rotate together. Each plunger cylinder is connected with high and low pressure oil in turn, and the driving torque generated by the action is added in the same direction, so that the motor output shaft can obtain continuous and stable torque.

This product is a radial single acting motor with simple structure, reliable operation and convenient maintenance. As the static pressure balance support is adopted for the main friction pair, the working pressure, sealing performance and low-speed stability are improved, the speed regulation range is expanded, and the mechanical efficiency, volumetric efficiency and starting efficiency are higher.

3.1 selection principle

The effective output torque, working pressure and working speed shall be determined according to the actual needs of the host, and the corresponding motor model shall be selected.

The pressure for long-term continuous use shall be 25% lower than the rated pressure The instantaneous service pressure shall not be greater than the specified maximum pressure And the continuous time should not exceed 1 minute.

The operating speed for long-term continuous operation shall not be greater than the rated speed. When there are high requirements for low-speed stability, the motor with the largest exhaust shall be selected.

3.2 use requirements

3.2.1 installation

Before installation, check whether the motor is damaged and whether the output shaft rotates flexibly. Motors that have been stored for too long The remaining oil in the Mada shall be drained, flushed and replaced with new oil. The bracket for mounting the motor must have sufficient rigidity. It shall be ensured that the transmission shaft connecting the motor is coaxial with the output shaft of the motor, The motor can be operated in any direction, but it must comply with the requirements of system connection and startup preparation.

3.2.2 system connection

Select an oil drain screw hole according to installation requirements Plug the rest with screw plug. The oil drain pipe shall be connected to the oil tank separately, and the oil return pipe shall not be connected directly.

The drain pipe should not be too long and the resistance is too large. The oil drain port shall be above the motor, and the highest liquid level position of the oil drain pipe shall be higher than the highest liquid level position in the Madan. The installation position of the oil inlet and outlet of the motor and the rotation direction of the motor shall be recognized. If the user needs to work in the opposite direction, the A.B oil ports can be installed in reverse or the rear end cover can be removed, and the flow distribution shaft can be installed by rotating 180 °.

3.2.3 Working conditions

The back pressure is generally 0.3~0.5mpa, and the higher the speed is The back pressure should be adjusted higher, and the oil supply of the motor should be greater than 25% of the working flow. Generally, the pressure in the shell shall not exceed 0.05Mpa.

The filtering accuracy of hydraulic oil shall not be greater than 25 μ。 The normal operating oil temperature shall generally be controlled within 30 ℃ ~55 ℃, and the short-term operating oil temperature shall be ≤ 80 ℃. N46 or N68 anti-wear hydraulic oil is recommended.

3.2.4 startup and operation

Before starting, check whether the installation and connection of the motor are correct and firm, and fill the housing with hydraulic oil from the highest oil drain port of the motor.

The pressure of the overflow valve in the oil supply pipeline shall be adjusted to the lowest value, and then gradually increase to the working speed after operation. No load running in shall not be less than 20 minutes, and then gradually pressurize to the working pressure. During operation, observe whether the motor and system work normally at any time. In case of abnormal temperature rise, leakage, vibration, noise or abnormal pressure pulsation, the machine shall be shut down immediately to find out the cause for maintenance. After maintenance, necessary performance test shall be conducted to verify whether it is qualified. The factory accepts the repair and test entrusted by the user.

4. lifting and storage

The motor shall be hoisted according to the requirements indicated on the packing box. The motor after unpacking shall be hoisted at its proper position with ropes. It shall not be hoisted with shaft extensions, oil inlets and outlets, oil drains and screw holes at the shaft end. The motor shall be stored in a dry warehouse without corrosive gas. It shall not be stored under high temperature and -20 ℃ for a long time. For long-term storage, the remaining oil in the Mada must be drained, filled with turbine oil with low acid value, and the exposed surface shall be coated with anti rust oil. The oil port plugs shall be blocked or covered with cover plates.

5. guarantee

Under normal use, in case of damage, serious leakage or failure to work normally due to the manufacturing quality problems of the company, the factory shall be responsible for the maintenance or replacement of the user within one year from the date of delivery (subject to the date of delivery invoice).