What is the difference between large spring and small spring mechanical seal?
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Dear friends, in daily use, the mechanical seals I come into contact with include large spring mechanical seals and small spring mechanical seals. What are the differences in structure and usage environment between the two? By the way, I want to ask more, what is the difference in use between spring mechanical seals and bellows mechanical seals?
The compensation of large springs is not very good, but the compensation of small springs is better. The compensatory performance of the bellows mechanical seal is better than that of the spring, but the bellows mechanical seal generally has higher environmental requirements, and the medium must not contain particles that are easy to crystallize, otherwise the bellows will be easily damaged. This post was last written by zhangya * ong edited on 2009-2-4 18:05 ]
According to the number of springs in the compensation mechanism, it can be divided into multi-spring and single-spring mechanical seals. A seal with multiple springs in the compensation mechanism is called a multi-spring mechanical seal. ； There is only one spring in the compensation mechanism called a single spring mechanical seal. Multi-spring mechanical seals are also called small spring mechanical seals. This structure has a small axial size. The elastic force can be changed by changing the number of springs. The axial force is relatively uniform. It is suitable for high-speed mechanical seals and should not be used in corrosive media. Single spring mechanical seal is also called large spring mechanical seal, and the sealing structure is relatively simple. Some seal types also use springs to transmit torque. Domestic seals often use large springs, but they cannot be used at high speeds.
Thank you, learn* . But how high is this highway? How to master it in actual work.
The large spring mechanical seal is suitable for equipment where the medium contains particulate matter and is prone to crystallization and coking.； The small spring mechanical seal has better compensation ； The bellows mechanical seal mainly has good anti-evacuation effect, long service life and good stability. The disadvantage is that it cannot be used on equipment with excessive pressure.
Large springs (i.e. single springs) do not have very good compensation, while small springs (i.e. multi-spring types) have better compensation. The compensatory performance of the bellows mechanical seal is better than that of the spring, but the bellows mechanical seal has higher requirements on the medium. The medium must not contain particles that are easy to crystallize, otherwise the mechanical seal will be easily damaged.