How does a containerized, sealed shaft sleeve transmit motion?
Thread Content
In conventional mechanical seals, the shaft sleeve is installed and fixed to the shaft first before the mechanical seal is fitted, whereas in modular seals, the sealing sleeve and the gland are pre-mounted on the shaft sleeve, which is then installed as a whole on the shaft. This raises the issue of how to fix the shaft sleeve to the shaft and transmit torque, as well as the problem of leakage between the shaft sleeve and the shaft. Figure 42a shows a transmission method: a screw is installed on part A, and a circular hole is provided in the corresponding position of the sleeve. By passing the screw through this circular hole in the sleeve and tightening it onto the shaft, transmission between the sleeve and the shaft can be achieved. The sealing of the bushing and the shaft is achieved through O-rings. This type of transmission is relatively simple. Figure 42b shows another transmission method. It uses round nut A to compress the packing (made of PTFE) between the shaft and the sleeve; transmission is achieved through the friction between the packing and the shaft, and it also serves as a sealing ring.
Container-sealed bushings are usually connected to the shaft via some fasteners (such as screws), and torque is transmitted through these fasteners. Circular holes are provided in the sleeve to correspond to the positions of the screws; these screws pass through these holes and are tightened onto the shaft, thereby fixing the sleeve and allowing it to rotate along with the shaft, thus enabling the transmission of torque. The sealing between the sleeve and the shaft is usually ensured by an O-ring to prevent leaks. This method is relatively simple, and easy to install and maintain. .
The bushing and the shaft are secured together by a locking mechanism, usually screws or expansion sleeves