CN1445465A

CN1445465A - Special bearing and bearing composite construction for X ray tube

Info

Publication number: CN1445465A
Application number: CN 03121379
Authority: CN
Inventors: 杨进周; 赵滨海; 马美玲; 陈原; 邱晋江; 扈文庄; 陈国才; 郭振伟
Original assignee: Luoyang Bearing Science and Technology Co Ltd
Current assignee: Luoyang Bearing Science and Technology Co Ltd
Priority date: 2003-03-27
Filing date: 2003-03-27
Publication date: 2003-10-01
Anticipated expiration: 2023-03-27
Also published as: CN1181271C

Abstract

A bearing dedicated for X-ray tube is composed of internal and external rings made of high-speed steel and with the channels puttered to form a compact MOS2 film as a lubricating layer, steel balls made of high-speed steel and coated with a silver layer by ionic method, and the holder made up of stainless steel 1Cr18Ni9 through punching and coated with a silver layer by electroplating. Such two bearings can be combined to form an assembly. It can reduce vibration and noise.

Description

Dedicated X-ray tube bearings and bearing combination structure

Technical field:

The present invention relates to the bearing unit technical field, a kind of Dedicated X-ray tube bearings and bearing combination structure.

Background technique:

The performance of X-ray pipe and quality directly have influence on the important performance of X-ray machine, the vibration of its parts, noise and life-span are the important technology indexs of X-ray pipe, the generation in the vibration of parts, noise and life-span has directly and confidential relation with the rolling bearing or the bearing composite structure that are installed in the X-ray pipe again, under the situation that homemade X-ray machine was not tight to the vibration index request of X-ray pipe in the past, vibration values is all between this 3-9g, and vibration values is disperseed.Along with the upgrading of product and the production domesticization of CT pipe, and people are to the medical work environment requirement, to the complete machine performance requirement higher level of X-ray machine; Therefore, be exactly that bearing and bearing composite structure propose higher requirement to producing vibration, noise and life-span direct factor in X-ray pipe and the CT pipe, make bearing unit can adapt in degree of vacuum is 1 * 10 ⁸Holder, operating temperature is 400-500 ℃, and rotating speed is 10000rpm, and whole tube vibration is the work of following long lifetime of condition of 1-2g, and general bearing just is difficult to be competent at.

Summary of the invention:

In order to overcome the defective that prior art exists, the purpose of this invention is to provide a kind of Dedicated X-ray tube bearings and bearing combination structure, solve the lubrication problem of bearing under high speed, high temperature with special special bearing and bearing unit, reduce a whole set of bearing vibration and noise.

The present invention adopts following technological scheme to solve as above problem.

Described X-ray pipe special bearing, constitute by inner ring, outer ring, steel ball and retainer, outer ring, the inner ring of its bearing are made with high speed steel, two groove curvatures have its specific value, and after raceway groove carries out the extra accuracy processing, form one deck MOS2 compact film on the surface with the sputter spraying method, and be even lubricating layer; Steel ball (2) is used the high speed steel manufacturing, and silver-plated in its surface ion method, forms one deck and stock adhesive strength height, and is not more than the homogeneous coating of 0.001mm; Retainer (3) forms lubricated silver layer that one deck be not more than 0.01mm with galvanoplastic on its surface by stainless steel material 1Cr18Ni9 drawing.Realize that by above measure special bearing is applicable to that the high speed and precision field boundary closes the reliability of lubricating down.

The bearing composite structure of described X-ray pipe special bearing is the bearing combination construction package that adopts two cover special bearings (5) to combine, and sends out the coaxality that blue axle (6) guarantees two cover special bearings (5) by highi degree of accuracy; Outer cage ring (8), interior cage ring (7) realize axially locating; Nut (10), adjustment circle (9), elimination axial internal clearance make its assembly in adjustment work, reduce vibration and noise.

The bearing combination construction package of described X-ray pipe can also adopt the bearing of another kind of structural type to constitute, and two covers that back-to-back install by axle connecting shaft and steel ball realization two outer rings are completely adorned the combination of angular contact ball bearing; By adjusting circle and spacer ring elimination axial internal clearance and giving and add load; Flange disc and axle connecting shaft are combined into one by argon arc welding, and such design makes the processing of a connecting shaft and precision be easier to realize; Collar is the axially locating when installing in the X-ray pipe for the bearing composite structure.

The bearing of the another kind of structural type of described X-ray pipe constitutes, and its outer ring, axle connecting shaft, steel ball also are to use the high speed steel manufacturing, and rolling surface also adopts the surface lubrication technical finesse.

Owing to adopted technological scheme as mentioned above, the present invention has following superiority:

Take the solid lubricant film forming technology, select the technological scheme of economical rationality, the steel ball ion is silver-plated, the stainless steel holder electrosilvering; This best-of-breed technology Scheme Selection has guaranteed that not only bearing is applicable to the lubricating reliability of adjusting accurate occasion, and manufacture cost is under control and descends.

The X-ray pipe special bearing and the bearing unit that adopt technological scheme to produce, because structure optimization, and effectively solved lubrication problem, and its X-ray tube lifetime is improved, vibration and noise have remarkable decline; By installing and using and technical examination on X-ray machine, obtained satisfied technique effect; And high-grade CT machine is also attempting to promote and use this special bearing and bearing unit.

Adopt the bearing unit of axle connecting shaft structure, owing to be the combinations that two cover angular contact ball bearings are arranged, it is simple in structure, more is applicable to high speed, the high temperature of X-ray pipe, the operating conditions of low-noise.And manufacture cost also descends to some extent.

Description of drawings:

Fig. 1 is an X-ray pipe special bearing structural representation.

Fig. 2 is the bearing combination structural representation after the X-ray pipe is assembled by special bearing.

Fig. 3 is the bearing combination construction package schematic representation that the X-ray tubular axis links structure.

As shown in Fig. 1,2: 1, outer ring; 2, steel ball; 3, inner ring; 4, retainer; 5, nut; 6, adjust circle; 7 outer cage rings; 8, interior cage ring; 9, send out blue axle.

Outer ring as shown in Figure 3,1; 2, steel ball; 3 adjust circle, 4, axle connecting shaft; 5, spacer ring; 6, collar; 7, flange disc.

Specific embodiment:

The present invention has taked the outer ring (1) of its bearing, inner ring (3) to make with high speed steel to the special bearing of the X-ray pipe of X-ray machine, two groove curvatures have its specific value, and after raceway groove carried out the extra accuracy processing, forming one deck MOS2 compact film on the surface with the sputter spraying method was even lubricating layer; Steel ball (2) is used the high speed steel manufacturing, and silver-plated in its surface ion method, forms one deck and stock adhesive strength height and is not more than the homogeneous coating of 0.001mm; Retainer (4) forms lubricated silver layer that one deck be not more than 0.01mm with galvanoplastic on its surface by stainless steel material 1Cr18Ni9 drawing; Realize that by above measure special bearing is applicable to high speed, high temperature, the accurate field boundary reliability of lubricating under closing.

The bearing combination construction package that adopts two cover special bearing composite structures to form is sent out the coaxality that blue axle (9) guarantees two cover special bearings by highi degree of accuracy; Outer cage ring (7), interior cage ring (8) realize axially locating; Nut (5), adjustment circle (6) are eliminated axial internal clearance, make its assembly in adjustment work, reduce vibration and noise; Can also adopt another kind of airframe bearing composite structure kit form, two covers that back-to-back install by axle connecting shaft (4) and steel ball (2) realization two outer rings (1) are completely adorned the combination of angular contact ball bearing; By adjusting circle (3) and spacer ring (5) elimination axial internal clearance and giving and add load; Flange disc (7) and axle connecting shaft (4) are combined into one by argon arc welding, and such design makes the machining accuracy of a connecting shaft (4) be easier to realize; Collar (6) is the axially locating when installing in the X-ray pipe for the bearing composite structure; The lubricated technology of the rolling surface of its outer ring (1), axle connecting shaft (4), steel ball (2) adopts and the identical method of X-ray pipe special bearing.

Claims

1, a kind of X-ray pipe special bearing, have inner ring, outer ring, steel ball, retainer, it is characterized in that: the outer ring of described special bearing (1), inner ring (2) are made with high speed steel, two groove curvatures have its specific value, and after raceway groove carried out the extra accuracy processing, forming one deck MOS2 compact film on the surface with the sputter spraying method was even lubricating layer; Steel ball (2) is used the high speed steel manufacturing, and silver-plated in its surface ion method, forms one deck and stock adhesive strength height and is not more than the homogeneous coating of 0.001mm; Retainer (4) forms lubricated silver layer that one deck be not more than 0.01mm with galvanoplastic on its surface by stainless steel material 1Cr18Ni9 drawing.

2, implement the X-ray pipe special bearing that the method for claim 1 is made, it is characterized in that: the assembly of its bearing composite structure, the bearing composite structure that adopts two cover special bearings to combine is sent out the coaxality that blue axle (9) guarantees two cover special bearings (5) by highi degree of accuracy; Outer cage ring (7), interior cage ring (8) realize axially locating; Nut (5), adjustment circle (6) are eliminated axial internal clearance.

3, the bearing of X-ray pipe special bearing as claimed in claim 2 combination construction package, it is characterized in that: described assembly parts can also adopt another kind of composite structure kit form, and two covers that back-to-back install by axle connecting shaft (4) and steel ball (2) realization two outer rings (1) are completely adorned the combination of angular contact ball bearing; By adjusting circle (3) and spacer ring (5) elimination axial internal clearance and giving and add load; Flange disc (7) and axle connecting shaft (4) are combined into one by argon arc welding; Collar (6) is to be used for the full structure of bearing pack axially locating when mounted.

4, as the composite structure assembly of claim 1,3 described X-ray pipe special bearings, it is characterized in that: two covers of back-to-back installing in the described construction package are completely adorned in the assembly of angular contact ball bearing, and the lubricated technology of the rolling surface of its outer ring (1), axle connecting shaft (4), steel ball (2) also can be taked same surface lubrication treatment technology method.