A hydraulic bearing is a type of bearing that provides support through hydraulic pressure, and its main feature is that it transmits and supports loads by using liquid as a medium. The following is the working principle of hydraulic throwaway bearing:

I. Composition and structure

Hydraulic bearing is mainly composed of bearing inner sleeve, bearing jacket, sealing ring and pressure oil circuit. The bearing inner sleeve is mounted on the shaft, the bearing jacket is fixed on the housing, and the sealing ring is used to keep the liquid inside the bearing sealed.

Second, hydraulic bearing working principle

1. Hydraulic pressure support:

Hydraulic bearings support the bearings through the liquid pressure generated by the high-pressure liquid. When the inside of the bearing is filled with high pressure liquids, these liquids will form a high pressure zone in the closed cavity of the bearing, thus providing the necessary support force.

2. Reduce contact area and friction:

Hydraulic bearings support the bearing through hydraulic pressure, reducing the contact area between the bearing and the support. This reduced contact area design significantly reduces the contact pressure and frictional resistance of the bearing, thereby reducing energy consumption and wear.

3. Oil film formation and static pressure:

In hydraulic bearings, when two bearing components rotate relative to each other, a lubricant film of a certain thickness is formed on the surface of the shaft tile. This layer of oil film through its liquid static pressure to support and transfer bearing load. The thickness and size of the oil film directly determines the bearing's ability to withstand the load. When the oil film thickness does not exceed the limit thickness, the liquid static pressure to be greater than the bearing load, the bearing will maintain stable work.

4. Heat and impurity exclusion:

The oil guide groove inside the hydraulic bearing is used to guide the fluid and exclude the corresponding heat and impurities from the inside of the bearing. This helps to keep the inside of the bearing clean and the temperature stable, thus improving the reliability and service life of the bearing.

5. Lubrication and self-spill:

Hydraulic bearings are often designed with unique lubrication systems, such as loop-back oil supply circuits or through-pressure oil circuit designs. These designs allow the bearings to receive a continuous supply of lubricating grease, which continually overflows to lubricate the bearings during operation. This unlimited self-overflow lubrication design can ensure that the bearings are always well lubricated.

Third, hydraulic bearing application characteristics

High load carrying capacity: Hydraulic bearings have high load carrying capacity through hydraulic pressure support and hydrostatic pressure of oil film to transfer loads.

Low friction and wear: the design of reducing contact area and friction resistance makes hydraulic bearings have low friction and wear.

Long Life: Hydraulic bearings typically have a long life due to good lubrication and reduced wear.

High accuracy and stability: Hydraulic bearings are able to maintain a high degree of accuracy in rotational trajectory and stability, reducing vibration and noise generation.

Hydraulic release bearing:

Hydraulic release bearing, also known as a Hydraulic throw-out bearing, is a component used in automotive clutch systems. Its primary function is to disengage the clutch by pressing against the clutch diaphragm spring when the clutch pedal is depressed. This action releases the pressure on the clutch This action releases the pressure on the clutch plate, allowing it to rotate freely and disengage from the engine's flywheel. Release bearings are crucial for smooth gear shifting in manual transmission vehicles.

Hydraulic release bearings are a key component used in vehicle clutch systems and work as follows:

1. Structural components:

   - Piston and cylinder: The hydraulic throwout bearing consists of an internal piston and a cylinder connected to it. The piston is located inside the bearing and can be pushed by pressure. 

2. Hydraulic principle:

   - Hydraulic throwout bearings use fluid pressure to control clutch operation. When the vehicle's clutch pedal is depressed, driving fluid enters the hydraulic throwout bearing's cylinder. This hydraulic pressure creates force through the piston.

3. Hydraulic throwout bearing operation process:

   - Clutch Release Phase: When the driver depresses the clutch pedal, the clutch slave cylinder (master cylinder) transmits fluid pressure to the hydraulic throwout bearing. The fluid pushes the piston, separating the pressure plate inside the bearing from the clutch disc, thus separating the engine from the transmission and stopping the vehicle from moving forward.

      - Clutch engagement phase: When the driver releases the clutch pedal, the pressure in the hydraulic system decreases and the piston retracts. This causes the hydraulic throwout bearing to come back into contact with the pressure plate, reconnecting the clutch disc to the pressure plate, which transmits engine power to the transmission and the vehicle continues to move forward. 

4. Advantages of hydraulic throwaway bearings:

   - Hydraulic throwout bearings offer several advantages over traditional mechanical throwout bearings, including lighter operation, faster response, longer life, and reduced maintenance requirements for the clutch system.

In short, hydraulic throwout bearings achieve smooth clutch operation and long-term reliability by utilising fluid pressure to transmit clutch operating forces.