Sealing method for oil fog lubrication electric mainshaft bearing

A technology of oil mist lubrication and electric spindle, which is applied in the sealing of engines, parts of boring machines/drilling machines, drilling/drilling equipment, etc., which can solve problems such as burning and jamming, and achieve easy maintenance, good sealing effect and low cost. cheap effect

Inactive Publication Date: 2008-07-09
LUOYANG BEARING SCI & TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a sealing method used in oil mist lubricated electric spindle bearings. Using this sealing method can solve the problem that the oil mist lubricated electric spindle bearings often enter the water and burn or get stuck in the case of strong grinding. , improve the service life and stability of the oil mist lubricated electric spindle

Method used

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  • Sealing method for oil fog lubrication electric mainshaft bearing

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Embodiment Construction

[0014] As shown in Figure 1: after the front bearing 7 and the rotating shaft 1 are fixed into the front bearing seat 6 at the front end of the electric spindle, the front small cover 5 is fixed on the front bearing seat 6 by screws at the outer end of the front bearing seat 6, and the electric Thread the front end of the spindle shaft 1, lock the front bearing 7 with the front nut 3, fix the two-piece baffle plate 4 on the front small cover 5 with screws, and then fix the dustproof with screws on the front end of the baffle plate 4 Cover 2.

[0015] A small gap seal is used between the front nut 3 and the baffle 4 . Waste oil mist is discharged from the gap here, so the size of the gap here should take into account the two points of sealing the bearing and allowing the waste oil to be discharged smoothly. After research and repeated tests, the diameter of the gap is controlled within the range of 0.4 ~ 0.6mm , the axial clearance is controlled within the range of 0.5-1 mm, a...

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Abstract

A sealing method used with an oil-mist lubricated electric main shaft bearing is provided. A front bearing 7 of the electric main shaft is sealed by the combination of larmier seal, small-clearance seal and labyrinth seal. A front screw cap 3 is designed with two water-throwing edges to form the larmier seal with strong blocking effect under the centrifugal action. The small-clearance seal is arranged between the front screw cap and a baffle 4, with a clearance diameter of 0.4-0.6 mm and an axial clearance of 0.5-1 mm, and the clearance size is defined by the basic size. The labyrinth seals formed by flexible joint planes are arranged between the front screw cap, the baffle and a front small cover 5, with a radial clearance less than 0.25 mm and an axial clearance less then 0.5 mm. Discharge holes are arranged below a dust-proof cover 2. The front bearing and a rotating shaft 1 are fixed on a front bearing seat 6. The rotating shaft 1 is locked by the front thread thereof. The baffle is fixed by bolt on the front small cover. The dust-proof cover is fixed by bolt on the front end of the baffle.

Description

technical field [0001] The invention belongs to the technical field of sealing, and in particular relates to a sealing method used in oil mist lubricated electric spindle bearings. Background technique [0002] The oil mist lubricated electric spindle needs to be equipped with an oil mist generator and connected to the electric spindle. The oil mist lubrication device generates clean oil mist with a pressure of about 0.3Mpa and enters the electric spindle bearing to lubricate the bearing. When the electric spindle is running normally, the oil mist needs to be continuously Supplying to the bearing, most of the exhaust gas generated is discharged from the gap between the front small cover and the front nut. The continuous supply of oil mist makes the generated exhaust gas have a certain pressure. When the exhaust gas leaks out, it also prevents the outside world from grinding. The shedding abrasive particles, metal powder and cutting fluid produced in the process attack the be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/16B23B47/00B23B19/02
Inventor 郭丽娟陈长江邱宪国徐同申黄昆田民肖汝峰李丽俞蓬
Owner LUOYANG BEARING SCI & TECH CO LTD
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