A constant force output air flotation device with electromagnetic compensation

Abstract

A constant-force-output air-floating device with the electromagnetic compensation function comprises an output air cylinder and an eletro magnetic actuator. The output air cylinder comprises a piston, a piston rod, a cylinder barrel, an end cover, a cylinder barrel cover and air inlet sleeves, wherein the air inlet sleeves comprise the first air inlet sleeve and the second air inlet sleeve, the eletro magnetic actuator comprises a long-stroke moving coil and a vibration exciter iron core, the piston rod is connected with the piston, the piston is arranged in the cylinder barrel in a sleeved mode, the two ends of the cylinder barrel are sleeved with the end cover and the cylinder barrel cover respectively, the piston rod penetrates through the cylinder barrel cover, the cylinder barrel is sleeved with the first air inlet sleeve, and the cylinder barrel cover is sleeved with the second air inlet sleeve; the vibration exciter iron core is installed on the cylinder barrel through a fixing base, the long-stroke moving coil is fixedly connected with the piston rod through a connecting rod, and the vibration exciter iron core is sleeved with the long-stroke moving coil. According to the constant-force-output air-floating device with the electromagnetic compensation function, air pressure change values in the cylinder barrel can be measured through a differential pressure transducer and then are fed back to the eletro magnetic actuator to compensate for output force values, high-accuracy constant-force output can be achieved, and gas films can be formed more stably without disturbance of air pipes.

Description

technical field [0001] The invention relates to a constant force output device. Background technique [0002] According to different application environments and application requirements, there are various structures and implementation methods for constant force output. Dynamic constant force output refers to loading a constant force value on a dynamically moving target workpiece. [0003] Hanging the target workpiece through weights is the simplest and most commonly used method of applying constant force. Since the mass of the weight is constant, the force acting on the target workpiece remains unchanged, but when the target workpiece is accelerating or decelerating, the weight The weight will generate an additional force acting on the target workpiece due to the influence of its own inertial force, and the greater the mass of the weight, the greater the effect, so this method is only suitable for low-speed or uniform-speed movement of the target workpiece. Torque motors,...

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Problems solved by technology

[0004] Aiming at the problems in the existing constant force output device that the output force value is difficult to keep constant, the sensor measurement is not accurate enough, and the constant force output accuracy is not high, the present invention provides a constant force output gas with accurate output force value, good stability and electromagnetic compensation. floating device

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