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Flexible heat pipe used for cooling surface of rotating shaft of high-speed motorized spindle

A high-speed motorized spindle and surface cooling technology, applied in metal processing machinery parts, maintenance and safety accessories, metal processing equipment, etc., can solve the problems of restricting the machining accuracy of CNC machine tools, lack of heat extraction methods, thermal deformation of rotating shafts, etc. Compact, low cost, and the effect of improving machining accuracy

Active Publication Date: 2018-09-25
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no effective heat extraction method for the heat generated by the rotor part of the electric spindle motor, which leads to the continuous accumulation of heat in the electric spindle to form a temperature distribution pattern of "outside cold and inside heat", which in turn leads to thermal deformation of the shaft, which seriously restricts the numerical control. Improvement of machining accuracy of machine tools

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  • Flexible heat pipe used for cooling surface of rotating shaft of high-speed motorized spindle
  • Flexible heat pipe used for cooling surface of rotating shaft of high-speed motorized spindle
  • Flexible heat pipe used for cooling surface of rotating shaft of high-speed motorized spindle

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] refer to figure 1 and figure 2 , a flexible heat pipe used for cooling the surface of the high-speed electric spindle shaft provided by the present invention. Firstly, the main components of the high-speed electric spindle are briefly introduced. The typical structure of the electric spindle mainly includes the rotating shaft 1. The front end cover 2 is used for sealing protection, the rear end of the rotating shaft 1 is matched with the rear bearing assembly 5, and the rear end cover 6 is used for sealing protection, the motor rotor is interference fit with the electric spindle shaft 1, and the motor stator is fixed with the electric spindle housing 4 together and are therefore not shown in the figure. When the electric spindle is running, due to factors such as frictional heat generation of the bearing, loss of the motor, and wind motors of the rotating s...

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Abstract

The invention discloses a flexible heat pipe used for cooling the surface of a rotating shaft of a high-speed motorized spindle. The flexible heat pipe (7) comprises a substrate (701), a runner plate(702) and a cover plate (703), the substrate (701), the runner plate (702) and the cover plate (703) are sequentially bonded from top to bottom, wherein the runner plate (702) is provided with a heatpipe runner, and a sealed heat transfer fluid is filled in the heat pipe runner. The flexible heat pipe is adhered on the surface of the rotating shaft by bending in use. The temperature of the rotating shaft is obviously increased because of the loss of an internal motor, the generation of heat by friction of front and rear bearings and wind motor of the rotating shaft at the operation state of the motorized spindle. The provided flexible heat pipe has an excellent heat transfer performance at the high centrifugal force, the local temperature rise of the rotating shaft is effectively controlled, the thermal deformation caused by the uneven temperature distribution is reduced, the influence of thermal deformation of the rotating shaft on the machining precision of the high-speed motorizedspindle is effectively controlled, meanwhile, the original structure of the motorized spindle is less changed, and the flexible heat pipe has the advantages of high reliability, low cost, easiness inpromotion and implementation and the like.

Description

technical field [0001] The invention belongs to the technical field of high-speed electric spindle cooling, and in particular relates to a flexible heat pipe used for cooling the surface of a high-speed electric spindle shaft. Background technique [0002] The thermal characteristics of the electric spindle are an important index to measure the overall performance of the spindle system. High-precision CNC machine tools require that the electric spindle has a small thermal deformation when it is heated and expanded. Because the high-speed electric spindle generates a lot of heat during work, it is easy to cause thermal deformation of the spindle system. According to existing research, the error caused by thermal deformation is far greater than the accuracy error, which can account for 70% of the overall error, which seriously affects the machining of the machine tool. precision. Therefore, reducing the thermal deformation of the high-speed spindle system has become one of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q11/12
CPCB23Q11/127
Inventor 高建民梁锋徐亮李法敬李云龙
Owner XI AN JIAOTONG UNIV
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