CN208570524U - A kind of hollow bearing Formula X ray tube of anode corrugations ceramic structure - Google Patents

Abstract

A kind of hollow bearing Formula X ray tube of anode corrugations ceramic structure, belong to medical detection and ray metering detection technique field, including ring, second bearing outer ring and anode corrugations ceramics among hollow shaft sleeve, shaft, first bearing outer ring, bearing, the centre of the hollow shaft sleeve is equipped with cavity one, the shaft is placed in cavity one, the anode corrugations ceramics are set in the outside of hollow shaft sleeve, and the right part of anode corrugations ceramics and the right part of hollow shaft sleeve connect, and the outer wall of the anode corrugations ceramics is equipped with ceramic ripple.Hollow shaft sleeve design, cooling oil can direct cool to inside axle sleeve, and the heat of target disc is less conducted to shaft, then conduct to axle sleeve, take away heat by cooling oil, the reliability of bearing can be improved；Anode corrugations Ceramic Art Design, the heat of rotor copper sheathing is radiation-curable on anode ripple ceramic, then through anode corrugations ceramic conductive into cooling oil.

Description

A kind of hollow bearing Formula X ray tube of anode corrugations ceramic structure

Technical field

The utility model belongs to medical detection and ray metering detection technique field, and in particular, to a kind of anode corrugations The hollow bearing Formula X ray tube of ceramic structure.

Background technique

X-ray tube is mainly used on the Medical Devices such as X-ray production apparatus, CT machine, in the case where applying external high pressure effect, generates X and penetrates Line is diagnosed or is treated to patient for doctor.

X-ray tube generates the mechanism of X-ray approximately as: the filament (cathode) of X-ray tube in a heated state, freely Electronics escapes filament surface, forms electron cloud.Apply (generally 40 ~ 150 under high-voltage case between X-ray tube cathode, anode Kilovolt), the electronics high speed at filament is flown to target disc (anode), generates X-ray after hitting anode disc, and defeated by ray window Effective X-ray out.It has been observed that only 1% electronic kinetic energy is converted into X-ray in this energy conversion process, residue 99% is moved It can be converted into thermal energy, by heat radiation or heat transfer, reached outside X-ray tube, by X-ray tube pipe sleeve and X-ray tube radiator band It walks.Specifically, comprising: (1) heat (account for total amount of heat 90%) a part of target disc is radiated the metal-back in the middle part of X-ray tube On, another part is radiated outside X-ray tube through both ends glass bulb or other materials, and last part is taken away by rotor copper sheathing. The heat maximum for being wherein radiated metal-back accounts for about 60%, through the heat about 20% of glass radiation, is taken away by rotor copper sheathing Heat about 20%.(2) heat (accounting for total amount of heat 10%) of cathode is taken away by cathode glass and metal-back.

In use, X-ray tube only has 1% energy to be converted into X-ray, remaining 99% is converted into thermal energy, it is necessary into Row rapid cooling.Therefore, the thermal management of X-ray tube is to influence one of its reliability and the key factor in service life.

As shown in figure 4, under prior art, since the temperature at work of target disc can reach 1000 degree or more, heat The temperature of amount conduction to ball bearing shaft has 500 degree or more, and shaft can only be transferred heat in insulating oil by axle sleeve, cause to dissipate The thermal efficiency is very low.

In the prior art, X-ray tube has the drawback that in radiation processes

1, anode thermal capacity is limited；

2, bearing material is required high；

3, bearing life is limited；

4, in target disc high-speed rotation, fixed positional shift and the risk height that falls off occurs.

The reason of leading to conclusions, is as follows:

1, in existing X-ray tube design, high pressure generator anode is connected by the screw thread on ball bearing with target disc, the knot Structure limits the radiating efficiency of ball bearing；Meanwhile target disc can reach 1100 degree of high temperature when working, heat passes through molybdenum rod conduction To iron seat, then shaft is arrived, is then conducted again by ball to bearing outer ring, outer ring is conducted to axle sleeve, is taken away by insulating oil.Thus may be used See, the path of heat conducting and radiating is very long.And constraints above condition, cause anode thermal capacity can only accomplish 3.5MHU and hereinafter, Be not suitable for the X-ray tube of the big thermal capacity of 5MHU or more；

2, in existing X-ray tube design, the heat of target disc is conducted to shaft, but the maximum operating temperature that shaft allows is not high In 550 degree, so the material that manufacture shaft ring flange generally uses pyroconductivity extremely low, so bearing mnanufacture cost is very high；

3, since shaft long-term work is at 500 degree or so, this requires the operating temperatures of bearing outer ring cannot be below 350 degree (note: this kind of centripetal thrust force airframe bearing internal-external temperature difference does not allow more than 150 degree, and otherwise bearing internal external raceway is easily-deformable leads to card Axis), and often the temperature of bearing outer ring can only meet most basic temperature requirement (maintaining 350 ° or so), cause under bearing life Drop；

4, in existing X-ray tube design, target disc fixed form is that single thread fixed form specific structure is shown in Fig. 1, due to sun Pole target disc at work revolving speed reach 10800 RPM, which results under high speed operation state screw thread be possible to loosen, mesh Preceding solution is: (1) target disc and rotor copper sheathing are fixed using single thread, subsequent using 1600 DEG C of high-temperature solder welding, should Scheme is with high costs, need to put into electron beam welding equipment；(2) target disc and rotor copper sheathing are fixed using molybdenum nut, molybdenum nut and rotor Copper sheathing uses machine riveting, and program poor reliability, target disc falls off when being easy to cause high speed rotation, there is security risk；(3) target Disk and rotor copper sheathing are fixed using molybdenum nut, are connected between molybdenum nut and rotor copper sheathing by tantalum gasket, and which increases cost And loosening is had when high speed rotation, influence picture quality.

Utility model content

Purpose of utility model: the purpose of the utility model is to provide a kind of hollow bearing Formula X of anode corrugations ceramic structure Ray tube solves target disc in X-ray tube to bearing and transmits heat, causes bearing only excessively high, increase manufacturing cost or The problem of influencing bearing service life.

Technical solution: the utility model provides a kind of hollow bearing Formula X ray tube of anode corrugations ceramic structure, including Hollow shaft sleeve, shaft, first bearing outer ring, bearing centre ring, second bearing outer ring and anode corrugations ceramics, the hollow shaft sleeve Centre be equipped with cavity one, the shaft is placed in cavity one, among the first bearing outer ring, bearing outside ring and second bearing Circle is arranged between the outer wall of shaft and the inner wall of hollow shaft sleeve, and ring is placed in first bearing outer ring and the second axis among bearing Between bearing outer-ring, the anode corrugations ceramics are set in the outside of hollow shaft sleeve, and the right part of anode corrugations ceramics and sky The right part of spindle sleeve connects, and the outer wall of the anode corrugations ceramics is equipped with ceramic ripple.Hollow shaft sleeve design, cooling oil can It direct cools to inside axle sleeve, and the heat of target disc is less conducted to shaft, then conducts to axle sleeve, it will be hot by cooling oil Amount is taken away, and the reliability of bearing can be improved；Anode corrugations Ceramic Art Design, the heat of rotor copper sheathing are radiation-curable to anode ripple ceramic On, then through anode corrugations ceramic conductive into cooling oil.

Further, the hollow bearing Formula X ray tube of above-mentioned anode corrugations ceramic structure, the left part of the shaft is stretched Cavity one out, and the left part of shaft is equipped with rotor molybdenum bar.

Further, the hollow bearing Formula X ray tube of above-mentioned anode corrugations ceramic structure, the outside of the rotor molybdenum bar Equipped with support ring.

Further, the hollow bearing Formula X ray tube of above-mentioned anode corrugations ceramic structure, the anode corrugations ceramics Left part is equipped with anode and can cut down greatly, and the junction of the right side that the anode can be cut down greatly and the left side of anode corrugations ceramics is equipped with End seal one.

Further, the hollow bearing Formula X ray tube of above-mentioned anode corrugations ceramic structure, the anode corrugations ceramics Right part is equipped with that anode is small cuts down, and the small left side cut down of anode and the junction of the right side of anode corrugations ceramics are equipped with The outer wall of end seal two, the small inner wall cut down of the anode and hollow shaft sleeve connects.Anode corrugations ceramics and the sealing structure that can be cut down Using end seal, flat envelope, sleeve and clamp, wherein clamp can be metal or ceramics, and end seal structure improves the strong of junction Degree.

Further, the hollow bearing Formula X ray tube of above-mentioned anode corrugations ceramic structure, the shaft and rotor molybdenum bar Junction, rotor molybdenum bar and support ring junction be equipped with multiple screws.It is fixed using more screws, existing skill can be improved Single screw fixation method in art, central shaft rod and the junction of rotor molybdenum bar are fixed using 3-6 screw, rotor molybdenum bar and branch The junction of pushing out ring is fixed using 6-12 screw, melts spot welding using argon arc welding, is not needed any other technique and is realized target disc High speed rotation 10800rpm, reliability is high.

Further, the hollow bearing Formula X ray tube of above-mentioned anode corrugations ceramic structure, it is close in the hollow shaft sleeve The small end cut down of anode is equipped with cavity two.The cavity two and one inside non-contact structure of cavity of setting, cooling oil enter cavity Two, it can quickly take away the heat of hollow shaft sleeve, bearing and shaft.

Further, the hollow bearing Formula X ray tube of above-mentioned anode corrugations ceramic structure is set on ring among the bearing There are transition rings.The transition rings of setting are in order to improve the mechanical strength of ring among bearing.

Further, the hollow bearing Formula X ray tube of above-mentioned anode corrugations ceramic structure, the shaft stretch out cavity one End be equipped with flange one, the flange one be equipped with bearing flange.The diameter of section of the flange one of setting is greater than the straight of shaft Diameter can be stably connected with by bearing flange with rotor molybdenum bar.

Further, the hollow bearing Formula X ray tube of above-mentioned anode corrugations ceramic structure, the outer wall of the hollow shaft sleeve Gap is equipped between the inner wall of rotor molybdenum bar.Rotor molybdenum bar and hollow shaft sleeve non-contact structure, between be equipped with gap, Neng Goufang Only heat directly passes through rotor molybdenum bar and is transferred on hollow shaft sleeve, extends the transmission path of heat, reduces the temperature at bearing Degree, extends the service life of bearing.

Above-mentioned technical proposal can be seen that the utility model has the following beneficial effects: anode described in the utility model The hollow bearing Formula X ray tube of ripple ceramic structure has as follows a little:

1, the reliability that X-ray tube works under high speed rotation state is improved.Due to using support ring and rotor copper sheathing 6 Screw connection and bearing are connected with 6 screws of rotor copper sheathing, avoid single fixed form, reduce target disc when rotating at high speed Loosening risk；

2, bearing service life and product reliability are improved.The utility model target disc heat will not be directly conducted to bearing, Bearing is set to work at low temperature, it will not overheating deforming；

3, increase dielectric strength.Using ripple ceramic structure, surface creepage distance can be increased, that is, increase insulation by force Degree；

4, increase homogeneous tube mechanical strength.Using ripple ceramic and end seal structure, it is ensured that the concentricity of homogeneous tube reduces Mechanical stress between insulating materials and metal increases mechanical strength；

5, the ability for bearing secondary electron bombardment is improved.Ceramics can be resistant to 1400 degree of high temperature, bear secondary electron bombardment Ability be significantly larger than glass, thus improve the service life of X-ray tube.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the hollow bearing Formula X ray tube of anode corrugations ceramic structure described in the utility model；

Fig. 2 is the structural schematic diagram of hollow bearing described in the utility model；

Fig. 3 is the structural schematic diagram of anode corrugations ceramics described in the utility model；

Fig. 4 is the structural schematic diagram of prior art X-ray tube described in the utility model；

Fig. 5 is the structural schematic diagram that target disc described in the utility model and bearing radiate；

Fig. 6 is the partial enlarged view of Fig. 5.

In figure:, target disc 1, anode glass bulb 1, rotor copper sheathing 1, bearing holder (housing, cover) 1, shaft 1, axis External threading 1.

Specific embodiment

The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model Limitation.

In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", " up time The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of Describe the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, It is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, the meaning of " multiple " It is two or more, unless otherwise restricted clearly.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be Concrete meaning in the present invention.

In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it "lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above " One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special Sign is directly below and diagonally below the second feature including fisrt feature under the second feature " below ", " below " and " below ", or only Indicate that first feature horizontal height is less than second feature.

Embodiment

The hollow bearing Formula X ray tube of anode corrugations ceramic structure as shown in Figure 1, 2, including hollow shaft sleeve 1, shaft 2, Ring 4, second bearing outer ring 5 and anode corrugations ceramics 6, the centre of the hollow shaft sleeve 1 are set among first bearing outer ring 3, bearing There is cavity 1, the shaft 2 is placed in cavity 1, ring 4 and second bearing outer ring 5 among the first bearing outer ring 3, bearing It is arranged between the outer wall of shaft 2 and the inner wall of hollow shaft sleeve 1, and ring 4 is placed in first bearing outer ring 3 and second among bearing Between bearing outer ring 5, the anode corrugations ceramics 6 are set in the outside of hollow shaft sleeve 1, and the right end of anode corrugations ceramics 6 Portion is connect with the right part of hollow shaft sleeve 1, and the outer wall of the anode corrugations ceramics 6 is equipped with ceramic ripple 61.Anode uses wave Line ceramics, ceramics use 95%, 97%, 99% aluminum oxide industrial ceramics, and the ripple of any shape or the slot of transverse direction are opened in pottery Porcelain surfaces externally and internally, ripple ceramic and the sealing structure that can be cut down are using end seal, flat envelope, sleeve and clamp, and wherein clamp can be Metal or ceramics.And the heat of target disc is less conducted to shaft, then is conducted to axle sleeve, is taken away heat by cooling oil, The reliability of bearing can be improved.Wherein, in hollow shaft sleeve 1 close to anode it is small cut down 12 end be equipped with cavity 2 15.In bearing Between ring 4 be equipped with transition rings 16.The end that shaft 2 stretches out cavity 1 is equipped with flange 1, and the flange 1 is equipped with bearing Flange 18.In addition, cavity 1 is stretched out in the left part of shaft 2, and the left part of shaft 2 is equipped with rotor molybdenum bar 8.Rotor molybdenum bar 8 Outside be equipped with support ring 9.The junction of the junction of shaft 2 and rotor molybdenum bar 8, rotor molybdenum bar 8 and support ring 9 is equipped with multiple Screw 14.The right part of rotor molybdenum bar 8 is equipped with rotor iron seat 21, and the outer cover of rotor iron seat 21 is equipped with rotor copper sheathing 20.Anode Target disc is connected by more screws with rotor copper sheathing, and rotor copper sheathing is connected by more screws with bearing, and all fixing screws are adopted With stainless steel material, spot welding mode is melted, does not need the high speed rotation 10800rpm that any other technique realizes target disc, reliability It is high.

The left part of anode corrugations ceramics 6 as shown in Figure 3, which is equipped with anode, can cut down greatly 10, and the anode can cut down greatly 10 right side The junction of end face and the left side of anode corrugations ceramics 6 is equipped with end seal 1.The right part of anode corrugations ceramics 6 is equipped with anode It is small to cut down 12, and the junction of the small left side for cutting down 12 of anode and the right side of anode corrugations ceramics 6 is equipped with end seal 2 13, The anode is small to be cut down 12 inner wall and connect with the outer wall of hollow shaft sleeve 1.Anode corrugations ceramics 6 use the three of 95%, 97%, 99% Al 2 O industrial ceramics.Using anode corrugations ceramic structure, increase anode ceramic watch area, improves the heat radiation energy of anode ceramics Power, the heat that rotor copper sheathing is radiated to anode ceramics can run through anode corrugations ceramic conductive into cooling oil, such target Heat a part of disk is conducted by metal-back into cooling oil, and a part passes through anode ceramic conductive into cooling oil, in this way As long as bearing solves the fever of itself at work.

It is equipped with gap 19 between the outer wall of hollow shaft sleeve 1 as shown in Figure 5,6 and the inner wall of rotor molybdenum bar 8, and supports Gap is equipped between the inner wall of ring 9 and the outer wall of rotor molybdenum bar 8, this structure ensure that the heat of target disc will not can be transferred directly to At bearing, the heat that target disc generates is transferred to first in support ring 9, is transmitted to the right along support ring 9, is reached support ring 9 and is turned It at the attachment screw 14 of sub- molybdenum bar 8, transfers heat on rotor molybdenum bar 8, rotor molybdenum bar 8 is non-connect with 1 surface of hollow shaft sleeve Touch, therefore heat is transferred to the left at the screw 14 that rotor molybdenum bar 8 is connect with shaft 2 along rotor molybdenum bar 8, by heat transfer To shaft 2, and bearing is further transferred heat to, this heat transfer path forms S type structure, extends path, reaches axis The heat at the place of holding greatly reduces, and hollow shaft sleeve 1 is equipped with the cavity 2 15 that can be filled with cooling oil, being capable of fast speed belt bearing running Heat, therefore reach the temperature at bearing already below the temperature that bearing is born, can effective protection bearing, extend making for bearing Use the service life.

The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art For art personnel, without departing from the principle of this utility model, several improvement can also be made, these improvement also should be regarded as The protection scope of the utility model.

Claims (10)

1. a kind of hollow bearing Formula X ray tube of anode corrugations ceramic structure, it is characterised in that: including hollow shaft sleeve (1), shaft (2), first bearing outer ring (3), bearing centre ring (4), second bearing outer ring (5) and anode corrugations are ceramic (6), the hollow shaft The centre for covering (1) is equipped with cavity one (7), and the shaft (2) is placed in cavity one (7), the first bearing outer ring (3), bearing Intermediate ring (4) and second bearing outer ring (5) are arranged between the outer wall of shaft (2) and the inner wall of hollow shaft sleeve (1), and bearing Intermediate ring (4) is placed between first bearing outer ring (3) and second bearing outer ring (5), and the anode corrugations ceramic (6) are set in sky The outside of spindle sleeve (1), and the right part of anode corrugations ceramic (6) is connect with the right part of hollow shaft sleeve (1), the anode The outer wall of ripple ceramic (6) is equipped with ceramic ripple (61).

2. the hollow bearing Formula X ray tube of anode corrugations ceramic structure according to claim 1, it is characterised in that: described Cavity one (7) are stretched out in the left part of shaft (2), and the left part of shaft (2) is equipped with rotor molybdenum bar (8).

3. the hollow bearing Formula X ray tube of anode corrugations ceramic structure according to claim 2, it is characterised in that: described The outside of rotor molybdenum bar (8) is equipped with support ring (9).

4. the hollow bearing Formula X ray tube of anode corrugations ceramic structure according to claim 1, it is characterised in that: described The left part of anode corrugations ceramics (6), which is equipped with anode, can cut down greatly (10), and the anode can cut down greatly right side and the anode wave of (10) The junction of the left side of line ceramics (6) is equipped with end seal one (11).

5. the hollow bearing Formula X ray tube of anode corrugations ceramic structure according to claim 4, it is characterised in that: described The right part of anode corrugations ceramics (6) is equipped with that anode is small cuts down (12), and the small left side for cutting down (12) of anode and anode wave The junction of the right side of line ceramics (6) is equipped with end seal two (13), the small inner wall for cutting down (12) of the anode and hollow shaft sleeve (1) Outer wall connection.

6. the hollow bearing Formula X ray tube of anode corrugations ceramic structure according to claim 3, it is characterised in that: described The junction of the junction of shaft (2) and rotor molybdenum bar (8), rotor molybdenum bar (8) and support ring (9) is equipped with multiple screws (14).

7. the hollow bearing Formula X ray tube of anode corrugations ceramic structure according to claim 1, it is characterised in that: described Cavity two (15) is equipped with close to the small end for cutting down (12) of anode in hollow shaft sleeve (1).

8. the hollow bearing Formula X ray tube of anode corrugations ceramic structure according to claim 1, it is characterised in that: described Ring (4) is equipped with transition rings (16) among bearing.

9. the hollow bearing Formula X ray tube of anode corrugations ceramic structure according to claim 1, it is characterised in that: described The end that shaft (2) stretches out cavity one (7) is equipped with flange one (17), and the flange one (17) is equipped with bearing flange (18).

10. the hollow bearing Formula X ray tube of anode corrugations ceramic structure according to claim 2, it is characterised in that: described Gap (19) are equipped between the outer wall of hollow shaft sleeve (1) and the inner wall of rotor molybdenum bar (8).