Applications Cam Clutch - 16. Vertical Pumps , Vertical Motors
Application
Back stopping
This mechanism prevents reverse rotation. The cam clutch overruns while the machine is operating, and engages to stop the occasional reverse rotation.
Supporting model(s)
- ・Special cam clutch
Adopting machine
Vertical Pumps , Vertical Motors

Applications
Layout
Purpose of Use and Operation Overview
For vertical pumps or vertical motors, there are some cases where reversing operation is forbidden depending on the specification or use purpose. The figure above shows an example of equipment attached with a check valve. Normally, water flows in the direction of . The check valve is used to prevent the reverse flow (
) of the water. If this check valve is damaged, the water may flow in the reverse direction and a pump may be operated reversely at high speed. Such reverse operation may cause system damage due to reduced lubrication of metal bearings. An effective countermeasure is to attach a cam clutch to position 1 or 2 in the figure above as a backstop. When a ratchet is used, a large dimension is required to receive the load with one tooth, and problems such as tooth chipping noise may be expected.
When Tsubaki's cam clutches are used ・・・
You can select the appropriate cam clutch based on the mounting position and lubrication type of the vertical pump or vertical motor.
BR and BR-P Series clutches are suitable for the backstop of high-speed overrunning in vertical pumps and motors. The cam lifts off while the pumps and motors are operating. This prevents contact with the inner and outer races, allowing longer life.
Advantage of using the cam clutch
- ・The cam clutch automatically overruns during the forward rotation and automatically engages during the reverse rotation.
- ・Compared with a ratchet, the system can be made compact by distributing the load among multiple cams.