Hydraulic power unit suitable for electro-hydraulic switch machine
The invention discloses a hydraulic power unit suitable for an electro-hydraulic switch machine. The hydraulic power unit comprises a pump valve assembly and an oil cylinder, the pump valve assembly comprises an oil pump, a first hydraulic control reversing valve and a second hydraulic control rever...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses a hydraulic power unit suitable for an electro-hydraulic switch machine. The hydraulic power unit comprises a pump valve assembly and an oil cylinder, the pump valve assembly comprises an oil pump, a first hydraulic control reversing valve and a second hydraulic control reversing valve. The first hydraulic control reversing valve is connected between the first chamber of the oil cylinder and the oil pump through a hydraulic pipeline; the second hydraulic control reversing valve is connected between the second chamber of the oil cylinder and the oil pump through a hydraulic pipeline; when the oil pump is in a non-working state, the first cavity of the oil cylinder is in fluid communication with the second cavity of the oil cylinder through the first hydraulic control reversing valve and the second hydraulic control reversing valve, the oil cylinder is in a pressure balance state, and the electro-hydraulic switch machine can be manually operated; when the oil pump is in a first working s |
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