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Primary shaft seal combined with secondary seal - uses piston controlled by seepage pressure from primary seal to apply secondary seal
Primary shaft seal combined with secondary seal - uses piston controlled by seepage pressure from primary seal to apply secondary seal
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机译:主轴密封与次级密封相结合-使用由初级密封中的渗透压力控制的活塞来施加次级密封
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摘要
The shaft seal assembly comprises primary and secondary face seals. The space between the seals is connected by a duct to the one end of a hydraulic piston coaxial with the shaft. The other end of the piston confronts a collar mounted on the shaft. If the pressure of seepage from the primary seal rises the piston is moved into engagement with the collar to establish the secondary seal. The collar may be axially slidable on the shaft, and when the piston acts on the collar the latter is pushed back against the pressure of a spring which then determines the pressure of the seal.
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