Metal Stamping in the Automotive Industry
The function of the relief valve of the single-column hydraulic press
by：WORLD
2022-11-08
The relief valve is an indispensable valve that constitutes the hydraulic system of the single-column hydraulic press; by adjusting and limiting the overflow of the relief valve and the maximum pressure of the hydraulic system, it can exert pressure regulation, pressure limiting and safety protection for the hydraulic system of the single-column hydraulic press effect.
How does the relief valve of a single-column hydraulic press work?
When the relief valve of the single-column hydraulic press works, the pressure of the hydraulic oil is controlled by the pressure adjustment of the spring. When the pressure of the hydraulic oil is less than the pressure required for the work, the spool is pushed by the spring to the inflow port of the hydraulic oil. inflow. The greater the pressure of the hydraulic oil of the single-column hydraulic press, the spool is pushed up by the hydraulic oil, the flow of the hydraulic oil returning to the oil tank through the relief valve is greater, and when the pressure of the hydraulic oil becomes below the spring pressure, the spool falls and blocks the hydraulic oil. Entrance.
Since the pressure of the hydraulic oil output by the oil pump is constant, the pressure of the hydraulic oil used in the hydraulic cylinder is always lower than the pressure of the hydraulic oil output by the oil pump. Therefore, during normal operation, the hydraulic oil must flow from the relief valve to the oil tank to maintain the hydraulic pressure of the hydraulic cylinder of the single-column hydraulic press. balance to maintain normal work. It can be seen that the hydraulic oil pressure of the hydraulic system of the single-column hydraulic press with the relief valve plays a role of safety protection when the pressure exceeds the rated load.
In addition, the relief valve is linked with the throttle valve, and the throttle valve adjusts the flow of hydraulic oil and controls the moving speed of the piston.
The function of the relief valve of the single-column hydraulic press:
1. Play the role of overflow.
When refueling with a quantitative pump, it can cooperate with the throttle valve to adjust the flow of the hydraulic system to achieve a balance; in this case, the valve is mostly opened with the pressure change, and the oil flows into the fuel tank through the valve, which has a constant pressure. The effect of overflow.
2. Play the role of security protection.
Avoid accidents caused by overloading of the hydraulic system of the single-column hydraulic press and the main engine. At this time, the valve is usually closed, and only opens when the load exceeds the specified limit, which plays the role of safety protection. Usually, the set pressure of the relief valve of a single-column hydraulic press is 10-20% higher than the maximum working pressure of the system.
3. For unloading valve.
At the same time, the pilot relief valve and the two-position two-way solenoid valve can be used to unload the single-column hydraulic press system.
4. The remote control of the single-column hydraulic press is realized by connecting the remote control valve piping to the inlet of the remote control valve which is easy to adjust the remote control port of the relief valve.
5. Carry out high and low pressure multi-level control.
By connecting the remote control port of the relief valve with several remote pressure regulators by the reversing valve, the high and low multi-level control of the single-column hydraulic press can be realized.
6. For sequence control valve
The return port of the pilot-operated relief valve is changed to the outlet for discharging pressure oil. When the pressure pushes open the cone valve, the original return oil passage is blocked, and returns to the oil tank through the newly machined return oil port. Control valve use.
7. In order to generate back pressure
If the relief valve is connected in series with the oil return passage, back pressure will be generated to keep the movement balance of the actuator of the single-column hydraulic press. Sometimes the set pressure of the relief valve is low, but generally a direct-acting low-pressure clarifying valve is used.
Building a brand as WORLD from the very start is simple so long as you keep 'the three C's' in mind: clarity, consistency and constancy.
automatic power press machine are the in thing today. To buy a for yourself do visit Shanghai Yingxin World Machinery Co., Ltd. at World Press Machine.
Among improvements to mechanical power press, nearly half of consumers considered quality and service as the most important change a business could make in its supply chain.
How does the relief valve of a single-column hydraulic press work?
When the relief valve of the single-column hydraulic press works, the pressure of the hydraulic oil is controlled by the pressure adjustment of the spring. When the pressure of the hydraulic oil is less than the pressure required for the work, the spool is pushed by the spring to the inflow port of the hydraulic oil. inflow. The greater the pressure of the hydraulic oil of the single-column hydraulic press, the spool is pushed up by the hydraulic oil, the flow of the hydraulic oil returning to the oil tank through the relief valve is greater, and when the pressure of the hydraulic oil becomes below the spring pressure, the spool falls and blocks the hydraulic oil. Entrance.
Since the pressure of the hydraulic oil output by the oil pump is constant, the pressure of the hydraulic oil used in the hydraulic cylinder is always lower than the pressure of the hydraulic oil output by the oil pump. Therefore, during normal operation, the hydraulic oil must flow from the relief valve to the oil tank to maintain the hydraulic pressure of the hydraulic cylinder of the single-column hydraulic press. balance to maintain normal work. It can be seen that the hydraulic oil pressure of the hydraulic system of the single-column hydraulic press with the relief valve plays a role of safety protection when the pressure exceeds the rated load.
In addition, the relief valve is linked with the throttle valve, and the throttle valve adjusts the flow of hydraulic oil and controls the moving speed of the piston.
The function of the relief valve of the single-column hydraulic press:
1. Play the role of overflow.
When refueling with a quantitative pump, it can cooperate with the throttle valve to adjust the flow of the hydraulic system to achieve a balance; in this case, the valve is mostly opened with the pressure change, and the oil flows into the fuel tank through the valve, which has a constant pressure. The effect of overflow.
2. Play the role of security protection.
Avoid accidents caused by overloading of the hydraulic system of the single-column hydraulic press and the main engine. At this time, the valve is usually closed, and only opens when the load exceeds the specified limit, which plays the role of safety protection. Usually, the set pressure of the relief valve of a single-column hydraulic press is 10-20% higher than the maximum working pressure of the system.
3. For unloading valve.
At the same time, the pilot relief valve and the two-position two-way solenoid valve can be used to unload the single-column hydraulic press system.
4. The remote control of the single-column hydraulic press is realized by connecting the remote control valve piping to the inlet of the remote control valve which is easy to adjust the remote control port of the relief valve.
5. Carry out high and low pressure multi-level control.
By connecting the remote control port of the relief valve with several remote pressure regulators by the reversing valve, the high and low multi-level control of the single-column hydraulic press can be realized.
6. For sequence control valve
The return port of the pilot-operated relief valve is changed to the outlet for discharging pressure oil. When the pressure pushes open the cone valve, the original return oil passage is blocked, and returns to the oil tank through the newly machined return oil port. Control valve use.
7. In order to generate back pressure
If the relief valve is connected in series with the oil return passage, back pressure will be generated to keep the movement balance of the actuator of the single-column hydraulic press. Sometimes the set pressure of the relief valve is low, but generally a direct-acting low-pressure clarifying valve is used.
Building a brand as WORLD from the very start is simple so long as you keep 'the three C's' in mind: clarity, consistency and constancy.
automatic power press machine are the in thing today. To buy a for yourself do visit Shanghai Yingxin World Machinery Co., Ltd. at World Press Machine.
Among improvements to mechanical power press, nearly half of consumers considered quality and service as the most important change a business could make in its supply chain.
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