Co je to hydromotor
Vane hydraulic motor
Hydraulic press machine motor, Due to the action of pressure oil, the unbalanced force makes the rotor produce torque. The output torque of the vane hydromotor is related to the displacement of the hydraulic motor and the pressure difference between the hydraulic motor’s inlet and outlet ports, and its speed is determined by the flow rate of the input hydraulic motor. Since hydraulic motors generally require forward and reverse rotation, the blades of vane hydraulic motors should be placed radially. In order to make the blade root always have pressure oil, a check valve should be provided on the path through which the return and pressure oil chambers pass into the blade root. In order to ensure that the vane hydraulic motor can start normally after the pressure oil is passed through, it is necessary to make the top of the blade and The inner surface of the stator is in close contact to ensure a good seal, so a pre-tension spring should be set at the root of the blade. The vane-type hydraulic motor has a small volume, a small moment of inertia, and sensitive action. It can be applied to occasions with high commutation frequency, but it has large leakage and is unstable when working at low speed. Therefore, vane-type hydraulic motors are generally used on occasions with high speed, low torque, and sensitive action requirements.
radial plunger hydraulic motor
Hydraulic press machine motor, The working principle of the radial plunger hydraulic motor. When the pressure oil enters the bottom of the plunger in the cylinder through the window of the fixed oil distribution shaft 4, the plunger extends outwards and tightly supports the inner wall of the stator. The cylinder has an eccentricity. Where the plunger contacts the stator, the reaction force of the stator to the plunger is. Force can be broken down into two components. When the oil pressure acting on the bottom of the plunger is p, the diameter of the plunger is d, and the angle between the force and the force is X, the force generates a torque on the cylinder, causing the cylinder to rotate. The cylinder body then outputs torque and speed outward through the transmission shaft connected with the end face.
axial piston motor
Hydraulic press machine motor, In addition to valve type flow distribution, axial piston pumps can be used as hydraulic motors in other forms in principle, that is, axial piston pumps and axial piston motors are reversible. The working principle of the axial piston motor is that the oil distribution plate and the swash plate are fixed, and the motor shaft is connected with the cylinder body to rotate together. When the pressure oil enters the plunger hole of the cylinder body through the window of the oil distribution plate, the plunger extends out under the action of the pressure oil and closes to the swashplate to produce a directional reaction force p against the plunger, which can be decomposed into a shaft The direction component and the vertical component Q. Q is balanced with the hydraulic pressure on the plunger, and Q makes the plunger produce a torque on the center of the cylinder, driving the motor shaft to rotate counterclockwise. The instantaneous total torque produced by the axial piston motor is pulsating. If the input direction of the motor pressure oil is changed, the motor shaft will rotate in a clockwise direction. The change of the inclination angle a of the swashplate, that is, the change of displacement, not only affects the torque of the motor but also affects its speed and steering. The greater the tilt angle of the swashplate, the greater the torque produced and the lower the speed.
gear hydraulic motor
Hydraulic press machine motor, In order to meet the requirements of forward and reverse rotation, the gear motor has the same oil inlet and outlet ports, which are symmetrical, and have a separate external drain port to lead the leakage oil of the bearing part out of the housing; in order to reduce the starting friction torque, rolling bearings are used; in order to reduce torque, The pulsating gear hydraulic motor has more teeth than the pump.
Gear hydraulic motors have poor sealing performance, low volumetric efficiency, input oil pressure can not be too high, can not produce large torque. And the instantaneous speed and torque change with the change of the position of the meshing point, so the gear hydraulic motor is only suitable for high-speed and small-torque occasions. Generally used in construction machinery, agricultural machinery, and mechanical equipment that does not require high torque uniformity.
High-speed hydraulic motor
Motors with a rated speed higher than 500r/min are high-speed motors. The basic forms of high-speed motors are gear type, vane type, and axial plunger-type. Their main features are high speed and low moments of inertia, which are convenient for starting, braking, speed regulation, and commutation.
low-speed hydraulic motor
Hydraulic motors with a speed lower than 500r/min are low-speed hydraulic motors. Its basic form is the radial plunger-type. The main features of low-speed hydraulic motors are: large displacement, large volume, low speed, can be directly connected to the working mechanism, no deceleration device is required, which greatly simplifies the transmission mechanism, and the output torque of the low-speed hydraulic motor is large, up to several thousand Tens of thousands of Nm, so it is also called a low-speed high-torque hydraulic motor.
