Magnetic levitation high-speed motorized spindle
A technology of high-speed electric spindles and electric spindles, which is applied in the direction of electrical components, electromechanical devices, electric components, etc., can solve the problems of electric spindle windings being damp, restricting the use of high-speed electric spindles, and wear, and achieve the effect of avoiding overheating and serious wear
Inactive Publication Date: 2015-11-11
TIANJIN CHUANGGE M & E TECH CO LTD
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AI Technical Summary
Problems solved by technology
Excessive axial force will cause overheating and serious wear of high-speed bearings
Thus limiting the use of high-speed electric spindle
Moreover, due to the sealing problem of the electric spindle, it often occurs that foreign matter enters the electric spindle along the rotating shaft and causes the winding of the electric spindle to be damp.
Method used
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[0008] As shown in the figure: the electric spindle stator wire package 25 is installed in the casing 26, and the casing 26 is connected with the upper end cover 21 and the front end cover 28 respectively. Bearing 2 and 5, seal cover 27 are housed in the front bearing sleeve 1. Front bearing outer spacer 3 and front bearing inner spacer 4 are housed between bearing 2 and 5.
[0009] Sliding sleeve 22 is housed in upper end cover 21, and sliding sleeve 22 is equipped with bearing 8 and 11, and rear bearing outer spacer 9 and rear bearing inner spacer 10 are housed between bearing 8 and 11. The NdFeB permanent magnet unit 18 is inlaid on the fixed sleeve 19, and the fixed sleeve 19 is pressed onto the upper end cover 21 by the outer cover 20. Fix the outer cover 20 on the upper end cover 21 with bolts, and a compression spring 13 is installed between the fixed sleeve 19 and the sliding sleeve 22. 14 is a cable.
[0010] The rotor 24 is installed on the rotating shaft 23, and t...
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The invention provides a magnetic levitation high-speed motorized spindle which has better sealing effect and can reduce overheating and wearing of a high speed bearing of the high-speed motorized spindle. The technical method of the invention is: the motorized spindle is provided therein a sleeve which separates a stator and a rotor and tightly attaches to an inner circle of the stator, and the two ends of the sleeve are respectively connected to the end covers which are at the two ends of the motorized spindle such that the stator winding of the motorized spindle is positioned inside an enclosed cavity. In this way, even the foreign articles or humid air enters the motorized spindle along a rotary shaft, no stator winding will be affected by the humidity. According to the invention, based on the theory that like magnetic poles repel each other, the rotary shaft at a non-shaft extending end of the rotor is provided with a RbFeB permanent magnet, and correspondingly another RbFeB permanent magnet assembly is secured to the cover of the motorized spindle. The repelling force between the permanent magnets supports part of the weight of the rotator so that the permanent magnets can auxiliary support in an axial direction for the rotator, and thus the high-speed bearing bears a reasonable axial loading.
Description
technical field [0001] The invention is a magnetic levitation high-speed electric spindle. It is a high-speed electric spindle supported by permanent magnets. It is mainly equipped with NdFeB permanent magnets on the shaft at the non-shaft extension end of the rotor. It belongs to the technical field of high-speed electric spindle. Background technique [0002] In the past, when the high-speed electric spindle with large power was used vertically, the rotor of the electric spindle was very heavy. The weight of the electric spindle rotor is completely borne by the bearings. Excessive axial force will cause overheating and severe wear of high-speed bearings. Thereby limiting the use by high-speed electric spindle. Moreover, due to the sealing problem of the electric spindle, it often occurs that foreign matter enters the electric spindle along the rotating shaft and causes the winding of the electric spindle to be damp. Contents of the invention [0003] The invention p...
Claims
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IPC IPC(8): H02K7/00
Inventor 张姿健
Owner TIANJIN CHUANGGE M & E TECH CO LTD