Why is hydraulic transmission technology widely used?

1. Hydraulic transmission is flexible and variable. Hydraulic technology uses liquids to transmit power, as liquids can deform and flow, making it more flexible than mechanical transmission. The direction and distance of power transmission are flexible and variable. Hydraulic power sources and hydraulic actuators can be distributed in any location that can be arranged, and power can be transmitted as long as it can be connected through pipelines.

2. The hydraulic system is easy to control linear motion. The hydraulic cylinder structure is relatively simple, and the output that can be transmitted is basically infinite. Therefore, hydraulic technology is the primary choice when controlling the load to perform linear motion.

3. Hydraulic systems can work under high pressure. Due to the much higher compressibility of gases compared to liquids, the energy stored under the same pressure is also much greater. Once an explosion occurs, it can be very harmful. Therefore, the working pressure is usually not allowed to exceed 0.6MPa. Liquids do not pose such a danger and can work under high pressure, so the transmitted power is much greater.

4. The hydraulic system has a high force density, and the working pressure of hydraulic cylinders can generally reach 35MPa. A hydraulic cylinder with an inner diameter of 20mm can output a force of 10000N and lift a weight of 1T. An electric cylinder with the same diameter can output a force of no more than a few hundred newtons.

5. Hydraulic motors have small inertia, small volume, and flexible rotation. For example, the starting time of hydraulic motors is only 0.1 seconds; Due to its small inertia, hydraulic motors can also achieve rapid reversal in an instant.

6. Hydraulic transmission has a high speed ratio. The speed of hydraulic transmission can generally reach 100 and up to 2000.

7. Hydraulic transmission can carry loads for large-scale stepless speed regulation. Although mechanical transmission can also regulate speed, such as in car transmissions, the clutch pedal must be pressed to disconnect the load during gear shifting, and it is graded.

8. Hydraulic loads are easy to monitor and limit. Hydraulic loads can be monitored through pressure gauges and overload protection can be achieved through relief valves.

9. Hydraulic systems have lubricating properties, and hydraulic oil also acts as a lubricant, reducing component wear and helping to extend component life.

10. Hydraulic systems are prone to heat dissipation, and both gear and electric transmissions generate heat due to internal losses, resulting in an increase in temperature; The flowing hydraulic oil can move the tropical zone away, thereby avoiding local overheating.

11. Hydraulic energy can be quickly stored in seconds with the help of an accumulator. Although electrical energy can also be stored in batteries, the allowed storage speed is still much lower than that of hydraulic accumulators.

12. Due to the low compressibility of liquids, the precision of hydraulic system control can be much higher.

13. Hydraulic systems have higher energy efficiency due to the heat generated during gas compression, accompanied by significant energy loss. Therefore, hydraulic transmission has higher energy efficiency.

14. Hydraulic systems facilitate electronic control. Hydraulic systems can receive computer control instructions through solenoid valves and other means, thereby achieving complex control actions. This has been widely used in automation control modes.