New device for calibration of leakage rate of spacecraft cabin balance valve

Ding, Derui; Chen, L.; Sun, Dong; Zhao, Liangyu; Wang, N.

doi:10.1016/j.vacuum.2020.109796

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…TEHD method is to consider not only the comprehensive influence of temperature change on fluid pressure generation and viscosity change but also the influence of pressure and temperature gradient in bearing bush on thrust bearing performance in numerical analysis block deformation, so the simulation results obtained by TEHD method are more accurate. Ding et al [18] established a fluid solid coupling theoretical analysis model of deep groove end face density and obtained the pressure distribution, liquid film thickness, and leakage rate of the liquid film by using the numerical calculation method. It was found that the wavy deformation of the seal end face would occur due to the effect of the deep groove, resulting in the hydrodynamic pressure effect due to the extrusion of the liquid film at the convergence gap in the direction of speed rotation.…”

Section: Related Workmentioning

confidence: 99%

Friction Performance Analysis of Reactor Coolant Pump Shaft Seal Based on Sensor and Computer Simulation

2022

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In recent years, the state has put forward a grand plan to develop nuclear power in order to control environmental pollution and carbon emissions. In nuclear power plants, mechanical seals for reactor coolant pump play an important role in nuclear power safety production. However, China cannot independently produce such mechanical seals, and they are blocked by foreign related technologies, which has seriously affected China’s nuclear power development plan and the overall safety of China’s nuclear power operation. Under this background, this paper studies the friction performance of the shaft seal of the reactor coolant pump, uses the sensor to obtain the data of friction factors such as low-pressure leakage, effectively monitors the low-pressure leakage through calculation and simulation modeling, truly reflects the operating state of the reactor coolant pump, and provides a new research direction and experimental basis for further analysis of the friction performance of the shaft seal of the reactor coolant pump. The results show that under the joint action of the pressure difference and the force generated by the deformation of the moving ring plate, the cone angle formed on the seal end face is 1300.9 μ convergence gap of rad. When the inlet water temperature is 65°C, the leakage rate is 1867.8 L/h. The deformation of the moving ring deformation ring plate can hinder the increase of the deformation cone angle of the moving ring. The greater the thickness of the moving ring deformation ring plate, the greater the seal leakage rate. The inlet temperature of the sealing medium and the friction performance of the material also have an impact on the sealing performance.

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Section: Related Workmentioning

confidence: 99%