The Three in One Feeder Factory Tells You The Composition Of The Hydraulic Transmission System Of The Machine Tool Feeder
Hydraulic transmission is used for a variety of mechanical equipment: machine tools, feeding machines, leveling machines, slitting machines, etc... The hydraulic transmission system of a machine tool is much more complex than that of a jack.
Composition of hydraulic transmission system of bed feeder
Working principle and composition of hydraulic transmission system
In the figure, the hydraulic cylinder 8 is fixed on the bed, and the piston and piston rod drive the workbench 9 to reciprocate. The hydraulic pump 3 is driven by a motor (not shown in the figure). It absorbs oil from the oil tank 1 through the oil filter 2 and sends it to the closed system. If the handle 7 of the reversing valve is pushed to the right to make the valve element at the position shown in the figure, the pressure oil from the hydraulic pump flows through the throttle valve 5 to the reversing valve 6 and enters the left chamber of the hydraulic cylinder 8, pushing the piston and the workbench 9 to move to the right. The oil in the right chamber of hydraulic cylinder 8 flows back to oil tank 1 through reversing valve 6. If the handle 7 of the reversing valve is pulled to the left to make the valve element at the position shown in the figure, the pressure oil from the hydraulic pump flows through the throttle valve 5 to the reversing valve 6 and enters the right chamber of the hydraulic cylinder 8, pushing the piston and the workbench 9 to move to the left. The oil in the left chamber of hydraulic cylinder 8 flows back to oil tank 1 through reversing valve 6.
If the reversing valve spool is in the middle position as shown in the figure, the two chambers of the hydraulic cylinder are closed, and the piston stops. The speed of the table movement is regulated by throttle valve 5. When the orifice of the throttle valve increases, the oil flow into the hydraulic cylinder increases, and the moving speed of the workbench increases. When the throttle valve is turned down, the moving speed of the workbench decreases. Turn the adjusting screw of the relief valve 4 to adjust the preload of the spring. The greater the preload of the spring, the higher the oil pressure that can be obtained in the closed system. When the workbench moves, the greater the maximum load that can be overcome. The smaller the preload, the smaller the maximum working pressure that can be obtained in the closed system, and the smaller the maximum load that can be overcome. In addition, in general, the oil quantity delivered to the system by the pump is more than the oil quantity required by the hydraulic cylinder, and the excess oil must be timely drained back to the oil tank through the overflow valve. Therefore, the relief valve 4 plays the role of pressure regulation and overflow in the hydraulic system.
(1) Power element is an energy conversion device that converts the mechanical energy input by the prime mover into liquid pressure energy. Its role is to provide pressure oil for the hydraulic transmission system. The most common form is various hydraulic pumps.
(2) The actuating element is an energy conversion device that converts the pressure energy of liquid into mechanical energy. Its function is to output force and speed (linear motion) or torque and speed (rotary motion) under the push of pressure oil. Such components include various hydraulic cylinders and hydraulic motors.
(3) Control element
It is used to control or adjust the pressure, flow or direction of the oil in the hydraulic transmission system to ensure that the actuator can complete the expected work. Such components mainly include various hydraulic valves, such as relief valve, throttle valve and directional valve.
(4) Auxiliary components refer to oil tank, accumulator, oil pipe, pipe joint, oil filter, pressure gauge, flowmeter, etc. These elements play the roles of heat dissipation and oil storage, energy storage, oil delivery, connection, filtering, pressure measurement and flow measurement respectively to ensure the normal operation of the hydraulic transmission system, and are indispensable components of the hydraulic transmission system.
