Valve worm gear speed ratio
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Dear teachers, the overseas client wants to equip the stem gate valve with AUMA electric actuators; they require us to provide the worm gear reduction ratio, as well as the reduction factor. What parameter of the worm gear does this refer to? Thank you first.
It seems like it all refers to the gear ratio.....
One turn of the worm corresponds to one tooth of the gear. How many turns the worm needs to make for the gear to turn one week – that is, the speed ratio. Does that foreign term refer to modulus? The actuators for this type of configuration need to be matched by the manufacturer – are you responsible for providing the transmission? Any other expats? I don’t understand. If it’s your transmission, just send him the transmission label; it contains all the necessary data for reference.
The former refers to the reduction ratio, while the latter does not
Our technical team referred to it as the reduction factor; it is likely the torque loss coefficient of the worm gear box. This was confirmed abroad, and indeed that’s the case – for example, if the torque applied by a 100 N·m worm gear box to the valve is 80 N·m, then the reduction factor is 0.8
Thank you for your prompt reply, which has helped me understand the specific meaning of this parameter again!
Gate valves are driven by screw mechanisms; in cases of large diameters or high pressures, a device capable of generating high torque is required to convert the electrical torque into screw thrust. In order to reduce the size of the electrical drive unit, gear reducers are typically used to increase the output torque of the electrical drive, thereby reducing the cost associated with purchasing such devices. The specific gear ratio to be used depends on the maximum thrust required by the valve. Generally, the gear ratio ranges between 3 and 7; for more details, you can contact 15333832617
Mechanical efficiency: 0.25–0.3 for bevel gearboxes; 0.8–0.85