Liquid lubrication rotating shaft resistance reduction method based on Taylor vortex regulation and control
A technology of liquid lubrication and rotating shaft, which is applied in the direction of bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of reducing the resistance of rotating shafts and shaft sleeves, complicated device design, and difficulty in application, etc., to achieve reduced resistance, wide application range, and easy installation Achieved effect
Active Publication Date: 2018-10-16
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
However, the design of the device is complicated, it is difficult to apply in the industrial field, and the purpose of drag reduction cannot be achieved through Taylor vortex control
At present, there is no better method in the field of industrial applications to continuously and effectively reduce the resistance between the shaft and the shaft sleeve
Method used
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[0035] In this embodiment, the test device is first fixed on the test bench, and an injection hole with a diameter of 2 mm is processed on the sleeve at a distance of 20 mm from the lower bottom surface. When installing the shaft sleeve 2 and the shaft 1, ensure that the shaft and shaft sleeve coaxiality is less than 0.02 and perpendicular to the test bench. A certain level of lubricating liquid is added to the gap between the rotating shaft 1 and the shaft sleeve 2. And in the process, the surface of the rotating shaft and the lubricating liquid are free of bubbles and impurities. By controlling the rotation speed of the rotor and the injection speed of the liquid to be tested, the hysteresis effect of Taylor vortex under different Reynolds numbers and different injection speeds can be realized, so as to realize the drag reduction method based on the Taylor vortex hysteresis effect. The specific steps are:
[0036] 1. Install the fixed viscometer, micro syringe pump and shaft ...
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The invention discloses a liquid lubrication rotating shaft resistance reduction method based on Taylor vortex regulation and control, and belongs to the technical field of liquid lubrication rotatingshaft resistance reduction. According to the liquid lubrication rotating shaft resistance reduction method, by means of the retardation effect of the Taylor vortex under the Taylor-Couette flow situation, when a rotating shaft rotates, the circumferential flow of lubrication liquid between the rotating shaft and a shaft sleeve belongs to Taylor-Couette flow; by controlling the liquid level heightof the gap between the rotating shaft and the shaft sleeve in Taylor-Couette flow, the rotating speed of the rotating shaft and the injection speed of to-be-measured liquid are controlled, and the retardation effect, at different Reynolds numbers and different injection speeds, of the Taylor vortex is achieved; and by slowly increasing the liquid level height of the lubrication liquid between therotating shaft and the shaft sleeve, the size and the number of the Taylor vortex are changed, and therefore resistance of the rotating shaft is reduced. The liquid lubrication rotating shaft resistance reduction method has the beneficial effects of being convenient and rapid to operate, easy to implement, remarkable and stable in resistance reduction efficiency and wide in application range.
Description
Technical field [0001] The invention relates to a method for reducing drag of a liquid lubricated rotating shaft, in particular to a method for reducing drag of a liquid lubricated rotating shaft based on Taylor vortex regulation. Background technique [0002] Liquid-lubricated shafts and shaft sleeves are widely used in engineering, and they are a common type of rotating pair. When the rotating shaft rotates in the shaft sleeve, it will drive the lubricating liquid to flow in the circumferential direction, and the incidental frictional resistance is the main source of resistance for this type of rotating pair. In the document "Experimental study of expansion and compression effects on thestability of Taylor vortex flow[J]." (Fluid Dynamics Research,2016,48(4):045502.), a method of gradually moving the Taylor-Couette device The roof method achieves the purpose of Taylor vortex regulation. However, the design of the device is complicated, and it is difficult to apply in the indu...
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IPC IPC(8): F16C33/10
CPCF16C33/1025
Inventor 胡海豹张文云文俊任刘珍鲍路瑶任峰
Owner NORTHWESTERN POLYTECHNICAL UNIV