scholarly journals Experimental Research of Journal Orbit for Water-Lubricated Bearing

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Xiaoyan Ye ◽  
Jing Wang ◽  
Desheng Zhang ◽  
Lanqian Hu ◽  
Xunan She
Keyword(s):  
High Pressure ◽  
Aspect Ratio ◽  
Pressure Distribution ◽  
Journal Bearing ◽  
Rotor System ◽  
High Pressure Pump ◽  
Pressure Pump ◽  
Revolution Speed ◽  
Circumferential Pressure ◽  
The Revolution

To study the transient dynamic characteristics of water-lubricated bearing-rotor system in seawater desalination high pressure pump, the water-lubricated bearing test device was designed and built based on the prototype of high pressure pump with 4-stage rotors. The test was conducted to study the journal orbit and circumferential pressure distribution of journal bearing. The result shows that, in startup stage, the journal whirled with little amplitude in low revolution speed, and as the revolution speed increased, the journal began to move irregularly. The hydrodynamic lubrication formed basically when close to the rated revolution speed, and there is stable whirling center and amplitude of the journal orbit. The circumferential pressure distribution of journal bearing changed severely and kept consistent with the change of journal orbit; when the revolution speed reached the rated speed, the pressure distribution is stable. We changed the radius clearance, the aspect ratio, and the rotating speed to analyze the influence on the bearing-rotor system at steady speed. In conclusion, the journal orbit and circumferential pressure of journal bearing are very stable when the clearance radius is 0.05 mm, the aspect ratio is 1, and the revolution speed is 3000 r/min.

Demonstration of a piston type integrated high pressure pump-energy recovery device for reverse osmosis desalination system

Desalination ◽  
2021 ◽  
Vol 507 ◽  
pp. 115033
Author(s):  
Daiwang Song ◽  
Yin Zhang ◽  
Haitao Wang ◽  
Lidong Jiang ◽  
Chengpeng Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
Reverse Osmosis ◽  
Energy Recovery ◽  
Pump Energy ◽  
High Pressure Pump ◽  
Pressure Pump ◽  
Reverse Osmosis Desalination

scholarly journals Study on the sealing defects impact on high pressure pump

2020 ◽  
Vol 997 ◽  
pp. 012005
Author(s):  
D P Bistriceanu ◽  
S G Pal ◽  
F C Ciornei ◽  
C Bujoreanu
Keyword(s):  
High Pressure ◽  
High Pressure Pump ◽  
Pressure Pump

Improvement in motor performance during high-pressure pump starting at NDDP, Kalpakkam

2008 ◽  
Vol 3 (1) ◽  
pp. 56
Author(s):  
R. Nagaraj ◽  
V. Murugan ◽  
A.Y. Dangore ◽  
K.L. Thalor ◽  
A.K. Saxena ◽  
...  
Keyword(s):  
High Pressure ◽  
Motor Performance ◽  
High Pressure Pump ◽  
Pressure Pump

Experimental Identification of Failures of High-Pressure Pump Drive

2015 ◽  
Vol 816 ◽  
pp. 421-425
Author(s):  
Robert Grega ◽  
Jaroslav Homišin ◽  
Silvia Medvecká-Beňová ◽  
Jozef Krajňák
Keyword(s):  
High Pressure ◽  
Specific Energy ◽  
Working Life ◽  
High Pressure Pump ◽  
Experimental Identification ◽  
Pressure Pump ◽  
Fundamental Condition ◽  
Real State

In practice, the mobile machines, machinery and their parts are sources of vibrations which could shorten their technical working life. In every machine, a specific energy is converted into vibrations of the machinery or their individual components. The information about machinery is fundamental condition of its future running. The methods of vibration diagnostic could be useful for monitoring of device wear and determining of real state of machines.

scholarly journals Non-Structural Damage Verification of the High Pressure Pump Assembly Ball Valve in the Gasoline Direct Injection Vehicle System

Processes ◽  
2019 ◽  
Vol 7 (11) ◽  
pp. 857 ◽  
Author(s):  
Liang Lu ◽  
Qilong Xue ◽  
Manyi Zhang ◽  
Liangliang Liu ◽  
Zhongyu Wu
Keyword(s):  
High Pressure ◽  
Structural Damage ◽  
Direct Injection ◽  
Equivalent Stress ◽  
Injection Pressure ◽  
Gasoline Direct Injection ◽  
Relief Valve ◽  
High Pressure Pump ◽  
Pressure Pump ◽  
Valve Ball

The injection pressure of the gasoline direct injection vehicle is currently developing from the low pressure to the high pressure, and the increase of the injection pressure has brought various damage problems to the high pressure pump structure. These problems should be solved urgently. In this paper, the damage problem of the high pressure pump unloading valve ball in a gasoline direct injection vehicle under high pressure conditions is studied. The theoretical calculation of the force of the pressure relief valve is carried out. Firstly, the equivalent friction coefficient is obtained by decoupling analysis of the statically indeterminate model. Based on this, a finite element model is established. The equivalent stress is obtained by numerical simulation. The equivalent stress is compared with the yield strength of the valve ball material to determine that the valve ball damage is a non-static damage. At the same time, the s-N curve of the probability of destruction of one-millionth of the material of the valve ball is given. Then, the fatigue numerical simulation is performed. A safety factor of 3.66 is obtained. In summary, the high pressure relief valve ball in the direct injection high pressure pump should not be a traditional structural damage under high pressure conditions. In the theoretical calculation, the tangential displacement and radial displacement of the ball are all on the micrometer level. It can be presumed that the surface damage of the valve ball is microscopic damage, such as fretting wear.

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