Thrust Hydrodynamic Bearing

Thrust Hydrodynamic Bearing Overview

Thrust hydrodynamic bearings are sliding bearings that bear axial loads through the hydrodynamic effect of fluid. The core mechanism is to use the relative motion between the rotating and fixed parts to form a hydrodynamic lubrication film in the lubricating medium (usually oil), thereby supporting axial forces and reducing friction. Such bearings are widely used in high-speed, heavy-load and precision equipment, such as turbines, compressors, water turbines, and ship propulsion systems.

Common models and key size parameters

The following are several typical thrust fluid dynamic bearing models and their main parameters:

Model Inner diameter (mm) Outer diameter (mm) Thickness (mm) Load capacity (kN) Speed ​​range (rpm) Lubrication method Material

• THB-50×100×20 50 100 20 15 1000-5000 Forced lubrication Babbitt alloy
• THB-80×150×30 80 150 30 30 2000-8000 Forced lubrication Bronze
• THB-120×200×40 120 200 40 50 3000-10000 Forced lubrication Polymer composite material
• THB-150×250×50 150 250 50 80 5000-12000 Forced lubrication Babbitt alloy
• THB-200×300×60 200 300 60 100 8000-15000 Forced lubrication Special coating

Application field analysis

Thrust Hydrodynamic Bearing has important applications in the following industries:

1. Energy field:

Typical equipment: turbines, steam turbines, gas turbines, etc.

Features: Able to withstand high axial loads and suitable for high-speed operation.

2. Industrial equipment:

Typical equipment: compressors, pumps, gearboxes, etc.

Features: Stable operation, long service life, suitable for heavy-load environments.

3. Transportation:

Typical equipment: ship propulsion systems, aircraft engines, etc.

Features: Anti-shock, anti-vibration, adaptable to complex working conditions.

4. Precision machinery:

Typical equipment: machine tool spindles, precision instruments, etc.

Features: high precision, low friction, suitable for high-speed precision equipment.

FAQ

Q1: What are the advantages of Thrust Hydrodynamic Bearing compared with thrust rolling bearings?

A1: Thrust Hydrodynamic Bearing has higher load capacity, better vibration reduction performance and longer service life, and is particularly suitable for high-speed, heavy-load and continuous operation scenarios. In addition, it has low operating noise and less maintenance requirements.

Q2: How to choose a suitable thrust hydrodynamic bearing?

A2: The following factors should be considered when selecting:

The size of the axial load.

The range of operating speed.

Lubrication method and type of lubricant.

Working environment (such as temperature, humidity, pollution, etc.).

Installation space and structural limitations.

Q3: What are the lubrication methods of Thrust Hydrodynamic Bearing?

A3: Common lubrication methods include:

Forced lubrication: Lubricating oil is provided by an external oil pump.

Oil ring lubrication: Lubricating oil is delivered to the bearing surface using an oil ring.

Self-lubrication: Lubricating film is automatically formed by shaft rotation.

Q4: What are the common faults of Thrust Hydrodynamic Bearing?

A4: Common faults include:

Wear or burning of the bearing due to insufficient lubrication.

Bearing damage caused by lubricant contamination.

Eccentric wear or vibration caused by improper installation.

Bearing failure caused by overload or overheating.

Q5: How to maintain Thrust Hydrodynamic Bearing?

A5: Maintenance measures include:

Regularly check the quality and oil level of the lubricant.

Clean the lubrication system to prevent contamination.

Monitor the temperature and vibration of the bearing.

Regularly replace the worn bearing liner or adjust the clearance.

Sintesi

Thrust Hydrodynamic Bearing occupies an important position in high-speed, heavy-load and precision equipment with its high load capacity, low friction loss and long life. Correct selection, installation and maintenance are the key to ensure its long-term stable operation.