Experimental Challenges and Solutions in Design and Operation of the Test Rig for Water Lubricated Journal Bearing

The study deals with the challenges in developing a
test rig to test the performance of water lubricated journal bearing.
The test rig is designed to simulate the working conditions of the
bearing in order to understand their performance before they are put
in operation. The bearing that is studied is the commercially available
water lubricated bearing which has a rubber liner bonded with a rigid
metal shell. The lubricant enters the bearing axially through a
pressurized inlet tank and exits to an outlet tank which is at
sufficiently low pressure. The load on the bearing is applied through
the dead weight system which acts both in upward and downward
direction so that net load acts on the bearing. The issues in feeding
the lubricant into the bearing from the inlet side and preventing the
leakage of the lubricant is discussed. The application of the load on
the test bearing while maintaining the bearing afloat is also discussed.

• Ravindra Mallya
• B. Satish Shenoy
• B. Raghuvir Pai

• Axial groove
• hydrodynamic pressure
• journal bearing
• test rig
• water lubrication.

[1] Wojciech Litwin, “Water lubricated bearings of ship propeller shafts –
problems, experimental tests and theoretical investigations”, Polish
Maritime Research, 4(62) Vol. 16; 2009, pp 42 – 50.
[2] Nakano et al., United States Patent, July 27, 1976, Patent Number –
3971606.
[3] D L Cabrera, N H Woolley, D R Allanson, Y D Tridimas, “Film
pressure distribution in water lubricated rubber journal bearings”, Proc.
IMechE, Journal of Engg Tribology, Vol. 219, 2005, pp 125 – 132.
[4] Litwin W, “The tests stands for water lubricated marine main shaft
bearings”, NORDTRIB 2006, Helsingor, Denmark.
[5] R Pai, D J Hargreaves, R Brown, “Modeling of fluid flow in a 3- Axial
groove water bearing using computational fluid dynamics”, 14th
Australian Fluid Mechanics Conference, Adelaide University, Adelaide,
Australia, 2001, pp 331 – 334.
[6] Nan Wang, Qingfeng Meng, Pengpeng Wang, Tao Geng and Xiaoyang
Yuan, “Research on film pressure distribution of water lubricated rubber
bearing with multi axial grooves based on wireless measurement
technique”, ASME, J. Fluids Eng. 135(8), 2013, pp 084501-1 – 084501-
6.