Regarding the actuation method of valves
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I would like to ask about the valve actuation methods: turbines, spur gears, and bevel gears. What are their respective characteristics and differences, as well as their appropriate application areas? Thank you:handshake
The turbine rotates partially and is suitable for ball valves, butterfly valves, plug valves, etc； Bevel gears and spur gears are multi-turn types, suitable for gate valves, globe valves, etc
The application of lead screws is to convert rotational motion into linear motion through the nut; driven by either ordinary lead screws or ball lead screws, they enable high precision and smooth movement. Gear transmission refers to a device that uses the teeth of driving and driven gears to directly transmit motion and power. Of all mechanical transmissions, gear transmission is the most widely used; it can be employed to transmit motion and power between any two shafts. The advantages of gear transmission are: smooth operation, precise gear ratio, reliable performance, high efficiency, long service life, as well as a wide range of applicable power, speed, and size options. For example, the transmitted power can range from very low values to several hundred thousand kilowatts ； The speed can reach up to 300 m/s ； Gear diameters can range from a few millimeters to over twenty meters. However, manufacturing gears requires specialized equipment, and meshing transmission generates noise. The tooth profile of a spur gear is distributed on a cylindrical surface; its two end faces have the same shape and size. Power is transmitted in a straight line, as its teeth are aligned with the gear’s centerline. The tooth shape of bevel gears (commonly known as hypoid gears) is distributed on a conical surface; their two end surfaces are similar in shape but differ in size. Power is transmitted at a 90-degree angle, as the teeth are at a 45-degree angle to the center of the gear. 1. Straight-tooth and helical bevel gears are simple to design, manufacture, and install, but they generate considerable noise; they are used for low-speed transmissions
:o:@What’s the purpose then? The purpose isn’t mentioned at all. Ordinary people know these things; what people want to know is the exact purpose – for example, what diameter of valves requires spur gears and what diameter requires bevel gears