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Deyuan Bearing Manufacturing Co.,Ltd
Categories
Water Lubricated Bearing



PTFE-based composite bearing

Introduction of Materials

The PTFE-based composite bearing is based on PTFE and reinforced by the carbon fiber, glass fiber and PEEK. It is formed by compression molding under certain pressure and sintered at a certain temperature. The bearings have low friction coefficient and excellent chemical stability, and are well resistant to high-temperature and corrosion.

The brazing process is used by the bearing assembly, which can greatly improve the shear strength of bearings.





Technical parameters


Density

g/cm3

Maximum

MPa

Water absorption

Maximum line speed

m/s

Elongation at break%

Dry friction cofficient

1.48

≥3

0.006%

≥20

112

≤0.15

Typical Applications

Marine pump, Propeller, Water turbine, Valve, Hydraulic pump station, Industrial pumps, Power plant



UHMWPE-based composite bearing


Introduction of Material

The UHMWPE-based composite bearing is based on UHMWPE and reinforced by the carbon fiber and glass fiber. It is formed by hot press or injection molding under certain temperature and pressure. It has lower friction coefficient compared with the PTFE-based composite bearing, and has small density, low water absorption as well as excellent wear-resistance.


Technical parameters

Density

g/cm3

Maximum

MPa

Water absorption

Maximum line speed

m/s

Dry friction coefficient

0.98

3

0.0036%

20

≤0.12


Typical Applications

Marine pump, valve,

Other fiber fabric reinforced resin-based composite bearing


Introduction of Materials

The fabric winding type of water lubrication materials are formed with fabric wrapping layer by layer after pre-immersed in resin and then sintered and cured under high temperature. The bearing has high strength, and excellent damp and tribological performance.



Technical parameters

Density

g/cm3

Maximum

MPa

Water absorption

Maximum line speed

m/s

Dry friction coefficient

1.15

64

1.25%

20

≤0.223


Typical Applications

Marine pump, Water turbine, valve, Hydraulic pump station, Industrial pumps, Power plant


Ceramic-based composite bearing

Introduction of Materials

The ceramic-based composite bearing is based on ceramic and compounded with fiber. The ceramic substrate can be high-temperature structural ceramic like graphite, silicon carbide, etc. These advanced ceramics have excellent performance such as high temperature resistance, high strength, high stiffness, corrosion resistance, and relative lighter weight. It is compounded with high strengthened and elastic fiber, which can improve the toughness and reliability of ceramic, so as to form fiber fabric reinforced resin-based composite bearings with excellent toughness.



Technical parameters

Density

g/cm3

Maximum

MPa

Water absorption

Maximum line speed

m/s

Dry friction cofficient

6.18

5

0.02%

30

≤0.20


Typical Applications

Nuclear main pump, Water pump, Valve, Hydraulic pump station

Glass fiber reinforced composite bearing

Introduction of Materials

The generic UK stern bearing is a kind of composites with glass fiber centrifugally casting. It has excellent damping characteristics, vibration absorption ability and is suitable for pairing with copper alloys as the water lubricating environment of friction pairs when the load is less than 0.5 MPa. It is used in QT stern bearings in Britain, and applied in speedboat water lubricating stern bearings in domestic. Our company has successfully developed the kind of materials and their various technical indicators of mechanical and physical properties are close to or higher than similar foreign products.



Typical Applications

Ship stern shaft,Military industry


Optimized design of structure

1. Optimization and analysis of water film capacity

According to the specific structure of the bearing, the CFD software Fluent can be applied to the simulation calculation of bearing water films’ loading characteristics to analyze the influence of bearings draw ratio, clearance, eccentricity, rotation speed, and water tanks structure, distribution and quantity to the pressure and temperature distribution, loading capacity and friction loss of water film, and to optimize the structure parameters of the bearing.

2. Optimization and analysis of the stress-strain

The finite element software is used to the simulated analysis and calculation of the bearing stress, improving the stress distribution through the structure optimization to improve the bearing friction and wear performance.

3. Test and analysis of stiffness

The test platform and finite element software are applied to the bearing stress and strain test and simulated analysis to get the stiffness characteristics of bearing and water film, laying a foundation for the optimization of shafting vibration characteristics.