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Question:

What is the difference between the valve drive gear and the handle?

What is the difference between the valve drive gear and the handle?

Answer:

Disadvantages of gear drive:Vibration, impact and noise in operation, and produce dynamic load.No overload protection.Requirements of gear cutting accuracy.Advantages of gear drive:The instantaneous transmission ratio is constant, and the work stability is higher.The use of non circular gear, the instantaneous transmission ratio according to the required design changes.The change gear ratio range, especially using planetary transmission, the transmission ratio can be up to 100~200 (single stage), the growth rate for slow down or drive.The speed range is large, the circumferential speed of gear can reach 200m/s or higher from V<0.1m/s, and the speed can range from n<1r/min to 20000r/min.
The gear drive valve utilizes the gears of the two gears to mesh with each other, transmits the mechanical transmission of power and motion, and uses the main, driven gear teeth to direct and transmit the movement and the power of the valve. According to the relative position of the gear axis, it is divided into parallel shaft cylindrical gear drive, intersecting shaft cone gear drive and staggered shaft helical gear drive. The utility model has the advantages of stable transmission, accurate drive ratio, reliable work, high efficiency, long service life, large power, speed and large size range.
The handle is directly connected to the stem to handle, people apply force to handle directly to the stem; spur gear refers to the stem link has a positive role in gear, handle the force through the gear drive to stem. The principle should be like this, but I do not know whether to use the spur gear is more labor-saving, or for other purposes, I am a novice, limited knowledge, limited understanding.

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