Selection of hydraulic pump and motor for servo hydraulic press
1. Determine the working pressure of hydraulic pump of hydraulic press. According to the determined large working pressure of the hydraulic cylinder, select the pressure loss of the oil inlet pipeline, the adjustment pressure is generally greater than the system's large working pressure.
2. Hydraulic pump flow. When fast forward, the flow rate is large (30L/min) and small (0.51l/min). The leakage conversion coefficient of the system is k = 1.2.
3. Determine the specification and model of hydraulic pump of servo hydraulic press. According to the above data, please refer to the product catalog and select double vane pump.
4. Select motor. The large output power of the hydraulic cylinder appears in the quick return state, and its value is 0.78kw. At this point, the output force of the pump station of the full-automatic oil press can be calculated. According to the calculation results, check the motor product catalog and select the motor corresponding to the above power and pump speed.
The reason why the main cylinder of the automatic oil press can not rise
Check whether the hydraulic oil is sufficient, check whether the oil has been damaged, check whether the pump is blocked or the pump seal is wrong. The leakage of hydraulic system is caused by many factors, and fundamentally eliminate the leakage of hydraulic system. A very big project. Only find out the reasons that affect the hydraulic system leakage, take reasonable measures to minimize the leakage of the hydraulic system.
In addition, the selection of seals is also very important. If the leakage factor is not fully considered at the beginning, it will bring incalculable loss to production. In view of the design and processing of hydraulic press in the process of design and processing, four-column tensile hydraulic press should fully consider the design and processing of sealing groove, which is an important factor affecting leakage. Select accurate assembly and repair methods to appreciate past experience. For example, in the assembly of the sealing ring, use special tools whenever possible and apply some grease to the sealing ring. In the pollution control of hydraulic oil, hydraulic press should start from the pollution source, strengthen the control of the pollution source, and take effective filtering measures and oil quality inspection on schedule. In order to effectively prevent external factors (water, dust, particles, etc.) from polluting the hydraulic cylinder, some protective measures can be added. In short, the prevention and control of leakage should be fully implemented in the four-column drawing hydraulic press.
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