Revolution machine as well as deceleration method and deceleration device thereof

Abstract

The invention discloses a revolution machine as well as a deceleration method and a deceleration device thereof. A main shaft of the revolution machine is fixedly or integrally connected with a deceleration shaft; the deceleration shaft is fixedly provided with a stirring paddle which is suspended at the periphery of the deceleration shaft and is positioned in a container; the container is provided with an opening through which a deceleration liquid can be gradually injected during a deceleration stage of the main shaft; during initial stage of deceleration, since a liquid level is relatively low, the deceleration liquid generates less resistance to the stirring paddle, the main shaft does not decelerate abruptly under driving of the deceleration shaft; along with rising of liquid level of the deceleration liquid, the deceleration liquid stirring depth of the stirring paddle is also gradually increased, i.e., the length, inserted into the deceleration liquid, of the suspended end of the stirring paddle is also gradually increased, so that the resistance to the deceleration shaft is also synchronously increased; the rotation speed of the main shaft driven by the deceleration shaft is slowly reduced, but the resistance generated to the deceleration shaft by the deceleration liquid is gradually increased, thereby ensuring that a nut used for fixing a grinding wheel on the fixed main shaft does not loosen, and ensuring the safety of the grinding wheel and the revolution machine.

Description

technical field [0001] The invention relates to a rotary machine used for the test of the rotational strength of the grinding wheel, and also relates to a deceleration method of the rotary machine and a deceleration device specially used for implementing the deceleration method. Background technique [0002] The rotational strength of the grinding wheel refers to the ability of the grinding wheel to resist cracking under the action of centrifugal force during the rotation of the grinding wheel, which reflects the tensile stress of the grinding wheel. It is the most important quality index related to equipment and personal safety in the manufacture and use of the grinding wheel. Generally, in the factory inspection of the grinding wheel, the rotary strength test must be carried out through the rotary machine. When performing the rotary strength test, the grinding wheel is first fixed on the main shaft of the rotary machine, and then the main shaft is raised to the specified sp...

AI Technical Summary

Problems solved by technology

[0004] However, the above two deceleration devices have obvious shortcomings during use and can only intervene when the main shaft naturally decelerates to a low-speed section (the deceleration stage includes a high-speed section with a high initial speed and a low-speed section with a low speed in the later stage). , so that the duration of the deceleration phase cannot be significantly shortened. The reason is that when the mechanical deceleration device intervenes in the high-speed section to decelerate, the mechanical deceleration device will generate a large reverse impact load on the main shaft, so that the nut that fixes the grinding wheel on the main shaft Loosening and falling off will cause damage to the grinding wheel and rotary machine; when the electric reducer adopts a DC excitation device to decelerate, it can only intervene when the motor frequency is less than 5HZ. If the motor frequency is greater than 5HZ, the intervention will cause the motor to generate a lot of heat. A large DC current will damage the electrical components of the deceleration circuit, causing damage to the electrical deceleration device and the motor; when the electrical deceleration device is decelerated with a reverse power supply device, it can only intervene when the motor speed is very low. It is easy to reverse the motor, so that the nuts fixing the grinding wheel will loosen and fall off, resulting in damage to the electric speed reducer and the grinding wheel

In addition, during the use of the mechanical deceleration device, there are disadvantages of large human factors, instability and high noise, especially the disadvantages of large human factors will lead to different lengths of deceleration phases when grinding wheels of the same specification are inspected , which destroys the consistency of timeliness of grinding wheel inspection

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