Hydraulic power unit used in electro-hydraulic brake control systems of mine winders, operating, among others, in hard coal mines. The unit is designed to control hydraulic brakes of mining winders operating in shaft hoisting systems, equipped with brake actuators (working pressure up to 16 MPa).
It ensures the execution of three types of braking: maneuvering, safety, and holding. The design of the hydraulic system is based on hydraulic, electrical, and electronic components, guaranteeing high brake reliability and thus safe operation in the shaft hoisting system.
The hydraulic power unit utilizes, among others, a proportionally controlled sandwich-plate pressure reducing valve along with an electronic control card, sandwich-plate valves, and the UZAE10 accumulator safety block.
system technical data
| nominal tank capacity | 300 l | electric motor power | 5/3 kW | type of working medium | hydraulic oil |
| pump type | gear | oil heater supply voltage | 230 V – 50 Hz | optimal medium viscosity | 46 mm2/s |
| pump displacement / flow | 11 dm3/rev. | control elements supply voltage | 24 V – DC | filtration | 10 µm |
| nominal system operating pressure | 16 MPa | cooler motor power | 0.068 kW | optimal operating temperature | 40÷55 °C |
| electric motor type | SKg 132 | cooler motor supply voltage | 230-400 50/60 Hz | permissible operating temperature | 10÷70 °C |
| electric motor supply voltage | 3 x 500 V – 50 Hz | pressure and temp. transducer signals | 4 – 20 mA | maximum noise level | 85 dB(A) |
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