The shaft connecting rod type low speed and high torque motor is suitable for the hydraulic transmission system of various machinery such as mining and construction machinery, overweight transportation equipment, heavy metallurgical machinery, petroleum and coal mining machinery, ship deck machinery, machine tools, light industry, plastic machinery, geological drilling equipment, etc. It is especially suitable for the screw drive of injection molding machine, lifting winch, drum drive, various rotary mechanism drive, crawler and wheel walking mechanism drive and other transmission machinery. The foreign five-star crankshaft connecting rod type low speed and high torque hydraulic motor products have the following knowledge and performance:
I. Performance
1. Large starting torque (mechanical efficiency is above 0.9 at startup), good low-speed stability, and can operate in a balanced manner at very low speed.
2. The crankshaft and the transport rod are supported by rollers, which has high mechanical efficiency.
3. It has a high power-to-weight ratio and a relatively small volume weight.
4. It has an eccentric shaft and a five-piston mechanism with a low excitation frequency, so it has the characteristics of low noise.
5. The plane compensation distributor has good reliability and less leakage. The piston and cylinder hole are sealed by a plastic piston ring, so it has a high volumetric efficiency.
6. The direction of rotation is reversible, and the output shaft is allowed to withstand radial and axial external forces.
II. Related knowledge Low-speed and high-torque hydraulic motors are being used more and more, and users should understand some basic knowledge.
1. The maximum working pressure refers to the maximum inlet pressure, and the continuous working pressure refers to the working pressure difference.
2. The motor cannot work at the highest pressure and maximum speed at the same time.
3. Under intermittent working conditions, the running time shall not exceed 10% per minute.
4. Recommended 68# anti-wear hydraulic oil, viscosity 37-73cSt, cleanliness ISO18/13
5. Maximum operating oil temperature 80°.
6. Before the motor works at full load, it should be run-in for 1 hour at 40% of the maximum working pressure.
7. The maximum back pressure allowed by the motor is 10MPa, but it is recommended not to exceed 5MPa. If it exceeds, an external oil pipe should be connected.