| INVESTIGATION INTO EFFECT OF SPRING PRESSURE ON PERFORMANCE OF BALANCED MECHANICAL SEALS |
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| 作者姓名： | SUN Jianjun GU Boqin College of Mechanical and Power Engineering Nanjing University of Technology Nanjing China |
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| 作者单位： | SUN Jianjun GU Boqin College of Mechanical and Power Engineering，Nanjing University of Technology，Nanjing 210009，China |
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| 基金项目： | 江苏省教育办自然科学基金
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Innovating Foundation for Doctoral Dissertation of Nanjing University of Technology, China |
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| 摘 要： | The loads acting on the sealing elements of balanced mechanical seals are analyzed. When the balance factor approaches the back pressure factor, the spring pressure will become main part of the face pressure. The leakage model of balanced mechanical seals is established on the base of M-B model for rough surface. Several GY-70 type balanced mechanical seals are tested. The influences of the spring pressure both on the leakage rate and on the friction characteristic of balanced mechanical seals are investigated. The research results indicate that as spring pressure increases, both the clear-ance between two end faces and the leakage rate will decrease, and the friction will be more serious because lubrication medium between the rotating ring and the stationary ring reduces, though the increase of the spring pressure may not be enough to change the face friction state of mechanical seals. There exists an optimum spring pressure for mechanical seal operation. Under this spring pres-sure, not only leakage rate is small, but also the seal end surfaces have a fine friction characteristic. Under different operating conditions, identical type mechanical seals may possess different spring pressure. Appropriate selection of spring pressure is valuable to realize long-period and small leakage rate operating of balanced mechanical seals.
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| 关 键 词： | 平行机械密封 渗漏速度 摩擦特点 分析几何学 |
INVESTIGATION INTO EFFECT OF SPRING PRESSURE ON PERFORMANCE OF BALANCED MECHANICAL SEALS |
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| SUN Jianjun GU Boqin College of Mechanical and Power Engineering,Nanjing University of Technology,Nanjing ,China.INVESTIGATION INTO EFFECT OF SPRING PRESSURE ON PERFORMANCE OF BALANCED MECHANICAL SEALS[J].Chinese Journal of Mechanical Engineering,2007,20(3):39-43. |
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| Authors: | SUN Jianjun GU Boqin |
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| Affiliation: | College of Mechanical and Power Engineenng,Nanjing University of Technology, Nanjing 210009, China |
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| Abstract: | The loads acting on the sealing elements of balanced mechanical seals are analyzed. When the balance factor approaches the back pressure factor, the spring pressure will become main part of the face pressure. The leakage model of balanced mechanical seals is established on the base of M-B model for rough surface. Several GY-70 type balanced mechanical seals are tested. The influences of the spring pressure both on the leakage rate and on the friction characteristic of balanced mechanical seals are investigated. The research results indicate that as spring pressure increases, both the clearance between two end faces and the leakage rate will decrease, and the friction will be more serious because lubrication medium between the rotating ring and the stationary ring reduces, though the increase of the spring pressure may not be enough to change the face friction state of mechanical seals. There exists an optimum spring pressure for mechanical seal operation. Under this spring pressure, not only leakage rate is small, but also the seal end surfaces have a fine friction characteristic.Under different operating conditions, identical type mechanical seals may possess different spring pressure. Appropriate selection of spring pressure is valuable to realize long-period and small leakage rate operating of balanced mechanical seals. |
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| Keywords: | Balanced mechanical seal Spring pressure Leakage rate Friction characteristic Fractal geometry SEALS MECHANICAL BALANCED PERFORMANCE PRESSURE SPRING EFFECT selection operating conditions different mechanical seal surfaces fine small optimum operation increase state lubrication medium |
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