The difference between hydraulic motors and hydraulic pumps
A hydraulic pump is a conversion device that converts the mechanical energy of a motor into hydraulic energy. It outputs flow and pressure, and it is hoped that the volumetric efficiency is high; a hydraulic motor is a conversion device that converts the pressure energy of the liquid into mechanical energy, and it outputs torque and speed. efficient. Therefore, the hydraulic pump is the power component, and the hydraulic motor is the executive component.
The steering of the output shaft of the hydraulic motor must be able to rotate forward and reverse, so its structure is symmetrical; and some hydraulic pumps (such as gear pumps, vane pumps, etc.) have clear regulations for steering, which can only be rotated in one direction, not at will Change the selection direction.
In addition to the oil inlet and outlet ports, hydraulic motors have separate oil leakage ports; hydraulic pumps generally only have oil inlet and outlet ports (except for axial piston pumps), and the leaking oil is connected to the oil inlet port.
The volumetric efficiency of hydraulic motors is lower than that of hydraulic pumps.
Generally, the working speed of hydraulic pumps is relatively high, while the output speed of hydraulic motors is relatively low.
In addition, the oil suction port of the gear pump is large and the oil discharge port is small, while the oil suction and discharge ports of the gear hydraulic motor are the same size.
The gear motor has more teeth than the gear pump.
The vane of the vane pump must be installed obliquely, while the vane of the vane motor is installed radially; the vane of the vane motor relies on the swallow spring at the root to press it against the surface of the stator, while the vane of the vane pump relies on the pressure of the root Oil and centrifugal force are pressed against the surface of the stator.
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