CN106014641A

CN106014641A - Superspeed turbojet engine

Info

Publication number: CN106014641A
Application number: CN201610329302.2A
Authority: CN
Inventors: 罗立峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-05-19
Filing date: 2016-05-18
Publication date: 2016-10-12
Anticipated expiration: 2036-05-18
Also published as: TW201706511A; WO2016184412A1; CN205858948U; CN205858494U; CN106026492A; WO2016184404A1; CN205858730U; TWI694210B; CN205858479U; WO2016184406A1; CN205858947U; CN205864174U; CN106014641B; CN105889313B; TW201706516A; CN205864143U; WO2016184408A1; WO2016184414A1; CN105889313A; CN106026517B

Abstract

The invention discloses a superspeed turbojet engine which comprises a turbine, an air compressor, a rotating shaft, two radial bearings, one thrust bearing and a combustion chamber. The radial bearings are grooved dynamic pressure gas radial bearings, and the thrust bearing is a mixed dynamic pressure gas thrust bearing. The middle portion of the rotating shaft is sleeved with the combustion chamber, the rotating shaft in the combustion chamber is sleeved with the two radial bearings, and the portion, between the combustion chamber and a pressing wheel, of the rotating shaft is sleeved with the thrust bearing. The superspeed turbojet engine can stably operate at a superspeed under a floating state, and for the same power requirement, the size of the turbojet engine can be remarkably reduced to achieve miniaturization.

Description

A kind of ultrahigh speed turbojet engine

Technical field

The present invention relates to a kind of ultrahigh speed turbojet engine, belongs to high-accuracy field of mechanical technique.

Background technology

The principle of turbojet engine is to utilize compressor to be gone from air inlet inspiration by air, and is compressed in combustor by air, Pressure-air after compression and mist of oil mixed gas are lighted by atomizer to the oil plant of combustor ejection atomization, igniter, mixed Conjunction gas combustion expands, and promotes turbine to rotate, after the turbine of rotation drives compressor mixture combustion to expand through turbine, and combustion Gas after burning sprays from puff prot, thus produces thrust.Wherein compressor and turbo blade are fixedly installed on axis, pressure The assembly rotary type that mechanism of qi, turbo blade, axis are constituted is arranged in engine casing, for realizing compressor, turbine leaf Sheet, axis constitute the rotational support of assembly, and described axis is provided with bearing；Owing to thrust-weight ratio is inversely proportional to physical dimension Relation, for small-size turbojet engine, to realize big thrust loading, it is necessary to bearing can realize ultrahigh speed steady running, but passes System oil system bearing also exists limit speed, when rotating shaft rotating speed oversteps the extreme limit rotating speed, bearing temperature rise can be made high, make bearing easily Damage and lost efficacy, so that commercial Application is limited to, it is impossible to meet current miniaturization requirement.

Summary of the invention

The problems referred to above existed for prior art, it is an object of the invention to provide a kind of can the ultrahigh speed of long-time steady operation Turbojet engine.

For achieving the above object, the technical solution used in the present invention is as follows:

A kind of ultrahigh speed turbojet engine, including turbine, compressor, rotating shaft, 2 journal bearings, 1 thrust bearing and Combustor, described turbine includes turbine, turbine air deflector and turbine cylinder, and described compressor includes pinch roller, calms the anger Machine diffuser and compressor housings；It is characterized in that: described journal bearing is slot type kinetic pressure gas journal bearing, including bearing Overcoat and bearing inner sleeve；Described thrust bearing is hybrid kinetic pressure gas thrust bearing, including two side panels and be folded in two Mid-game between individual side panel, is equipped with foil-type elastic component between each side panel and mid-game；Described combustor is set in rotating shaft Middle part, 2 journal bearings are respectively sleeved in the rotating shaft being positioned at combustor, described thrust bearing be set in be positioned at combustor with In rotating shaft between pinch roller.

As further embodiment, described little Micro Turbine Jet Engine also includes turbine support, compressor support, turns Axle sleeve, bearing holder (housing, cover) and left bearing room end cap and right bearing room end cap, described rotating shaft set is set in rotating shaft, journal bearing and only Thrust bearing is all set in rotating shaft and puts, and described bearing holder (housing, cover) is set in the outside of journal bearing and thrust bearing；Turbine cylinder with Turbine support is fixing to be connected, and turbine support is fixing with the housing of combustor to be connected, turbine support and turbine air deflector Fixing connection, turbine air deflector is fixing with left bearing room end cap to be connected；Compressor housings is fixing with compressor support to be connected； Compressor support is fixing with the housing of combustor to be connected, and compressor support is fixing with compressor diffuser to be connected, compressor diffusion Device is fixing with right bearing room end cap to be connected.

Preferably, the surface of described rotating shaft offers heat radiation helicla flute, is beneficial to the heat radiation of rotating shaft and bearing chamber.

Preferably, the outer circumference surface of described bearing inner sleeve and both ends of the surface are respectively provided with the slot type decorative pattern of regular shape.

As further preferred scheme, the slot type decorative pattern of the end face of described bearing inner sleeve is formed with the slot type decorative pattern of other end Specular, and the equal shape of radial profile of the slot type decorative pattern of the axial profile line of the slot type decorative pattern of outer circumference surface and both ends of the surface Become one_to_one corresponding and mutually join.

As further preferred scheme, the axial high bit line in the slot type decorative pattern of the outer circumference surface of described bearing inner sleeve and both ends of the surface Slot type decorative pattern in the high bit line of radial direction homogeneously corresponding and mutually join before end face peripheral chamfer；The slot type flower of outer circumference surface Axial neutrality line in stricture of vagina the most corresponding with the radial direction neutrality line in the slot type decorative pattern of both ends of the surface and before end face peripheral chamfer phase Handing-over mutually；Axial low-bit line in the slot type decorative pattern of outer circumference surface is the most relative with the radial direction low-bit line in the slot type decorative pattern of both ends of the surface Should and mutually join before end face peripheral chamfer.

Preferably, the fit clearance between described bearing inner sleeve and bearing outside is 0.003～0.008mm.

Preferably, the two ends at described bearing outside are provided with stop ring.

Preferably, the excircle of described bearing outside having coaxial through hole and shrinkage pool, described through hole is positioned at same In the shrinkage pool of axle, being beneficial to importing and the derivation of gas, on the one hand realize quick heat radiating aerofluxus, another side realizes bearing chamber Inside carry out air supply.

Preferably, the both ends of the surface of described mid-game are equipped with the slot type decorative pattern of regular shape, and the slot type decorative pattern of end face Specular is formed with the slot type decorative pattern of other end.

Preferably, the outer circumference surface in described mid-game also is provided with slot type decorative pattern, and the shape of the slot type decorative pattern of outer circumference surface Shape is identical with the shape of the slot type decorative pattern of both ends of the surface, and the groove of the axial profile line of the slot type decorative pattern of outer circumference surface and both ends of the surface The radial profile of formula decorative pattern is respectively formed one_to_one corresponding and mutually joins.

Slot type flower as further preferred scheme, the axial high bit line in the slot type decorative pattern of the outer circumference surface of mid-game and both ends of the surface The high bit line of radial direction in stricture of vagina is homogeneously corresponding and mutually joins before end face peripheral chamfer；Axle in the slot type decorative pattern of outer circumference surface The most corresponding with the radial direction neutrality line in the slot type decorative pattern of both ends of the surface to neutrality line and mutually join before end face peripheral chamfer； Axial low-bit line in the slot type decorative pattern of outer circumference surface the most corresponding with the radial direction low-bit line in the slot type decorative pattern of both ends of the surface and Mutually join before end face peripheral chamfer.

As further preferred scheme, the cooperation face of the foil-type elastic component matched with mid-game is provided with wear-resistant coating.

As further preferred scheme, described foil-type elastic component is 0.003～0.008mm with the fit clearance of mid-game.

As further preferred scheme, at least one end of described foil-type elastic component is fixed on the inner face of corresponding side panel.

As further preferred scheme, the foil-type elastic component on each side panel is multiple, and is uniformly distributed along the inner face of side panel.

As further preferred scheme, the foil-type elastic component being fixed on a side panel and the foil-type being fixed on another side panel Elastic component forms specular.

As further preferred scheme, the inner face at side panel is provided with the draw-in groove for fixing foil-type elastic component.

As a kind of embodiment, described foil-type elastic component is made up of ripple paper tinsel peace paper tinsel, the arc convex top of described ripple paper tinsel Fit with flat paper tinsel.

As another embodiment, described foil-type elastic component is made up of ripple paper tinsel peace paper tinsel, transition between the ripple arch of described ripple paper tinsel Base fits with flat paper tinsel.

As another embodiment, described foil-type elastic component is made up of two flat paper tinsels.

Above-mentioned slot type decorative pattern is impeller shape.

Above-mentioned foil-type elastic component is preferably through Surface heat-treatent.

Compared with prior art, there is advantages that

Because of turbojet engine provided by the present invention, be the lubricant using gas as bearing, the most not only have pollution-free, Friction loss is low, use the plurality of advantages such as time length, applied widely, energy-conserving and environment-protective, and uses described structure, heat radiation Effective, it is ensured that long-time steady operation；Especially, can realize under air supporting state because of the air bearing of described structure Ultrahigh speed steady running (after tested, up to 100,000～450, the limit speed of 000rpm), therefore wants for equal-wattage Asking, the present invention can make the volume of turbojet engine be substantially reduced realization miniaturization, have take up room little, easy to use etc. excellent Point, the development to promoting miniaturization new and high technology has important value, has significance progress relative to prior art.

Accompanying drawing explanation

Fig. 1 is the cross-sectional view of a kind of ultrahigh speed turbojet engine that embodiment 1 provides；

Fig. 2 is the left view perspective view of the local segmentation of the slot type kinetic pressure gas journal bearing that embodiment 1 provides；

Fig. 3 is the A partial enlarged drawing in Fig. 2；

Fig. 4 is that the right side of the local segmentation of the slot type kinetic pressure gas journal bearing that embodiment 1 provides regards perspective view；

Fig. 5 is the B partial enlarged drawing in Fig. 4；

Fig. 6 is the cross-sectional view of the hybrid kinetic pressure gas thrust bearing that embodiment 1 provides；

Fig. 7 a is the left view of mid-game described in embodiment 1；

Fig. 7 b is the right view of mid-game described in embodiment 1；

Fig. 8 a is the right view of the left hand plate being fixed with foil-type elastic component described in embodiment 1；

Fig. 8 b is the left view of the right side dish being fixed with foil-type elastic component described in embodiment 1；

Fig. 9 is the cross section structure schematic diagram of the foil-type elastic component that embodiment 1 provides；

Figure 10 is the perspective view of the foil-type elastic component that embodiment 1 provides；

Figure 11 is the cross-sectional view of a kind of slot type kinetic pressure gas journal bearing that embodiment 2 provides；

Figure 12 is the C partial enlarged drawing in Figure 11；

Figure 13 a is the left view perspective view of a kind of hybrid kinetic pressure gas thrust bearing that embodiment 3 provides；

Figure 13 b is that the right side of the hybrid kinetic pressure gas thrust bearing that embodiment 3 provides regards perspective view；

Figure 14 is the local segmentation perspective view of the hybrid kinetic pressure gas thrust bearing that embodiment 3 provides；

Figure 15 is the left view perspective view of mid-game described in embodiment 3；

Figure 16 is the D partial enlarged drawing in Figure 15；

Figure 17 is that the right side of mid-game described in embodiment 2 regards perspective view；

Figure 18 is the E partial enlarged drawing in Figure 17；

Figure 19 is the pivot structure schematic diagram that embodiment 4 is provided；

Figure 20 is the E partial enlarged drawing in Figure 19.

In figure, label is schematically as follows:

1, turbine；11, turbine；12, turbine air deflector；13, turbine cylinder；14, turbine support；2、 Compressor；21, pinch roller；22, compressor diffuser；23, compressor housings；24, compressor support；3, rotating shaft；31、 Rotating shaft set；32, heat radiation helicla flute；4, slot type kinetic pressure gas journal bearing；4a, left end journal bearing；4b, right-hand member are radially Bearing；41, bearing outside；411, through hole；412, shrinkage pool；42, bearing inner sleeve；43, slot type decorative pattern；431, cylindrical The slot type decorative pattern of side face；4311, axial high bit line；4312, axial neutrality line；4313, axial low-bit line；432, left end The slot type decorative pattern in face；4321, the highest bit line；4322, radially neutrality line；4323, radially low-bit line；433, right side Slot type decorative pattern；4331, the highest bit line；4332, radially neutrality line；4333, radially low-bit line；44, stop ring；5、 Hybrid kinetic pressure gas thrust bearing；51, side panel；511, left hand plate；512, right side dish；513, draw-in groove；52, mid-game； 521, the slot type decorative pattern of left side；5211, the highest bit line；5212, radially neutrality line；5213, radially low-bit line；522、 The slot type decorative pattern of right side；5221, the highest bit line；5222, radially neutrality line；5223, radially low-bit line；523, outer The slot type decorative pattern of periphery；5231, axial high bit line；5232, axial neutrality line；5233, axial low-bit line；53, paper tinsel Type elastic component；53a, the foil-type elastic component being fixed in left hand plate；53b, the foil-type elastic component being fixed on the dish of right side；531、 Ripple paper tinsel；5311, arc convex；5312, transition base between ripple arch；532, flat paper tinsel；6, combustor；61, combustor Housing；7, bearing holder (housing, cover)；8a, left bearing room end cap；8b, right bearing room end cap.

Detailed description of the invention

Below in conjunction with the accompanying drawings and technical scheme is described in detail by embodiment.

Embodiment 1

As shown in Figure 1: a kind of ultrahigh speed turbojet engine that the present embodiment provides, including turbine 1, compressor 2, rotating shaft 3,4,1 thrust bearing 5 of 2 journal bearings and combustor 6, described turbine 1 includes turbine 11, turbine air deflector 12 and turbine cylinder 13, described compressor 2 includes pinch roller 21, compressor diffuser 22 and compressor housings 23；It is special Levy and be: described journal bearing 4 is slot type kinetic pressure gas journal bearing, including bearing outside 41 and bearing inner sleeve 42；Described Thrust bearing 5 is hybrid kinetic pressure gas thrust bearing, including two side panels 51 and be folded in the mid-game between two side panels 52, between each side panel 51 and mid-game 52, it is equipped with foil-type elastic component 53；Described combustor 6 is set in rotating shaft 3 Portion, 2 journal bearings 4 are respectively sleeved in the rotating shaft 3 being positioned at combustor 6, and described thrust bearing 5 is set in and is positioned at combustion Burn in the rotating shaft 3 between room 6 and pinch roller 21.

Described little Micro Turbine Jet Engine also includes turbine support 14, compressor support 24, rotating shaft set 31, bearing holder (housing, cover) 7 And left bearing room end cap 8a and right bearing room end cap 8b, described rotating shaft set 31 is set in rotating shaft 3, journal bearing 4 and only Thrust bearing 5 is all set on rotating shaft set 31, and described bearing holder (housing, cover) 7 is set in journal bearing 4 and the outside of thrust bearing 5；Whirlpool Turbine housing 13 is fixing with turbine support 14 to be connected, and turbine support 14 is fixing with the housing 61 of combustor 6 to be connected, Turbine support 14 is fixing with turbine air deflector 12 to be connected, and turbine air deflector 12 is fixing with left bearing room end cap 8a even Connect；Compressor housings 23 is fixing with compressor support 24 to be connected；Compressor support 24 is fixing with the housing 61 of combustor 6 Connecting, compressor support 24 is fixing with compressor diffuser 22 to be connected, compressor diffuser 22 and right bearing room end cap 8b Fixing connection.

In conjunction with shown in Fig. 2 to Fig. 5: the outer circumference surface of described bearing inner sleeve 42 and left and right end face are respectively provided with the groove of regular shape Formula decorative pattern 43 (such as 431 in figure, 432 and 433, the slot type decorative pattern in the present embodiment is impeller shape), and left side The slot type decorative pattern 433 of slot type decorative pattern 432 and right side form specular.It is positioned at the groove of the outer circumference surface of bearing inner sleeve 42 The axial profile line of formula decorative pattern 431 is respectively formed one by one with the radial profile of the slot type decorative pattern (432 and 433) of left and right end face Correspondence also mutually joins, it may be assumed that the axial high bit line 4311 in the slot type decorative pattern 431 of outer circumference surface and the slot type of left and right end face The high bit line of radial direction (4321 and 4331) in decorative pattern (432 and 433) is the most corresponding and mutual before end face peripheral chamfer Handing-over；Axial neutrality line 4312 in the slot type decorative pattern 431 of outer circumference surface and the slot type decorative pattern (432 and 433) of left and right end face In radial direction neutrality line (4322 and 4332) the most corresponding and mutually join before end face peripheral chamfer；The groove of outer circumference surface Axial low-bit line 4313 in formula decorative pattern 431 and the radial direction low-bit line in the slot type decorative pattern (432 and 433) of left and right end face (4323 and 4333) are the most corresponding and mutually join before end face peripheral chamfer.

The slot type decorative pattern (431,432 and 433) of regular shape it is respectively provided with by the outer circumference surface and both ends of the surface making bearing inner sleeve 42, The slot type decorative pattern 432 of left side forms the slot type decorative pattern 431 of specular and outer circumference surface with the slot type decorative pattern 433 of right side The radial profile of slot type decorative pattern (432 and 433) of axial profile line and left and right end face be respectively formed one_to_one corresponding mutually Handing-over, it is ensured that produced by the slot type decorative pattern (432 and 433) of the impeller shape of both ends of the surface, pressurization gas is from axle center radially Carrying in the recess channels constantly formed toward the slot type decorative pattern 431 of outer circumference surface, running up axle so that forming higher support Hold required air film, and air film is i.e. as the lubricant of kinetic pressure gas journal bearing, is thus advantageous to realize described slot type dynamic pressure The gas lubricated journal bearing 4 high speed steady running under air supporting state.

It addition, when being respectively provided with stop ring 44 at the two ends of bearing outside 41, may be implemented under the drive of high speed gyroaxis, Make to be produced from sealing function between the both ends of the surface of bearing inner sleeve 42 and stop ring 44, make the action pneumatic physical ability that slot type decorative pattern continuously generates In the most airtight whole fit clearance being saved in bearing, fully ensure that the lubrication of the kinetic pressure gas journal bearing run up Need.

Fit clearance between described bearing outside 41 and bearing inner sleeve 42 is preferably 0.003～0.008mm, to further ensure that The reliability and stability that bearing runs up.

As shown in Figure 6: the hybrid kinetic pressure gas thrust bearing of one 5 that the present embodiment provides, including: two side panels 51, Between two side panels 51, it is folded with mid-game 52, between each side panel 51 and mid-game 52, is provided with foil-type elastic component 53；Institute The left side stating mid-game 52 is provided with the slot type decorative pattern 521 of regular shape, and right side is provided with the slot type decorative pattern 522 of regular shape.

Visible in conjunction with Fig. 7 a and Fig. 7 b: the slot type decorative pattern 521 of the left side of described mid-game 52 and the slot type decorative pattern 522 of right side Between form specular, the radial direction of the radial profile of the slot type decorative pattern 521 of left side and the slot type decorative pattern 522 of right side Contour line forms one_to_one corresponding.

Described slot type decorative pattern 521 is identical with the shape of 522, is impeller shape in the present embodiment.

Visible further combined with Fig. 8 a and Fig. 8 b: described foil-type elastic component 53 is fixed on (example on the inner face of corresponding side panel 51 It is fixed with foil-type elastic component 53b shown in the left hand plate 511 and Fig. 8 b being fixed with foil-type elastic component 53a as shown in Figure 8 a Right side dish 512), and the foil-type elastic component 53a being fixed in left hand plate 511 and be fixed on right side dish 512 on foil-type bullet Property part 53b formed specular.Foil-type elastic component on each side panel can be multiple (shown in figure are 4), and edge The inner face of side panel is uniformly distributed.

By arranging foil-type elastic component 53 between side panel 51 and mid-game 52, the left and right end face in mid-game 52 arranges rule shape The slot type decorative pattern (521 and 522) of shape, and make the slot type decorative pattern 521 of left side form mirror with the slot type decorative pattern 522 of right side As symmetrical, thus obtain the rigidity characteristic of the high limit rotating speed not only with slot type kinetic pressure gas thrust bearing, but also there is paillon foil The high impact-resistance of formula kinetic pressure gas thrust bearing and the hybrid kinetic pressure gas thrust bearing of the flexible characteristic of load-carrying ability； Because defining wedge shape space between foil-type elastic component 53 and mid-game 52, when mid-game 52 rotates, gas is because of the viscosity of himself Effect is driven and is compressed in wedge shape space, thus axial hydrodynamic power can be made to been significantly enhanced, relative to existing list Blank foil chip kinetic pressure gas thrust bearing, can have the limit speed being multiplied under same load；Simultaneously as increase Foil-type elastic component 53, under its elastic reaction, also can make the load-carrying ability of bearing, impact resistance and suppression axle whirling motion Ability significantly improves, and relative to existing simple slot type kinetic pressure gas thrust bearing, can have and be multiplied under same rotational speed Impact resistance and load-carrying ability.

Shown in Fig. 6 and Fig. 9, Figure 10: described foil-type elastic component 53 is made up of ripple paper tinsel 531 peace paper tinsel 532, described The top of the arc convex 5311 of ripple paper tinsel 531 fits with flat paper tinsel 532, transition base 5312 between the ripple arch of described ripple paper tinsel 531 Fit with the inner face of corresponding side panel 51.

For reducing the mid-game 52 the run up abrasion to foil-type elastic component 53 further, to extend the service life of bearing, Preferably wear-resistant coating (not shown) is set on the cooperation face of the foil-type elastic component 53 matched with mid-game 52.

Embodiment 2

As is illustrated by figs. 11 and 12, the difference of a kind of slot type kinetic pressure gas journal bearing and embodiment 1 that the present embodiment provides It is only that: there is on the excircle of described bearing outside 41 coaxial through hole 411 and shrinkage pool 412, described through hole 411 In coaxial shrinkage pool 412, being beneficial to importing and the derivation of gas, on the one hand realize quick heat radiating aerofluxus, another side realizes Bearing indoor are carried out air supply.

Embodiment 3

In conjunction with Figure 13 a, 13b, shown in 14 to 18 visible, the hybrid kinetic pressure gas thrust bearing of one that the present embodiment provides With differing only in of embodiment 1:

Outer circumference surface in described mid-game 52 also is provided with slot type decorative pattern 523, and the shape of the slot type decorative pattern 523 of outer circumference surface with The shape identical (being impeller shape in the present embodiment) of the slot type decorative pattern (521 and 522) of left and right end face, and cylindrical The axial profile line of the slot type decorative pattern 523 of side face is equal with the radial profile of the slot type decorative pattern of left and right end face (521 and 522) Form one_to_one corresponding and mutually join；That is:

Axial high bit line 5231 in the slot type decorative pattern 523 of outer circumference surface is high-order with the radial direction in the slot type decorative pattern 521 of left side Line 5211 is the most corresponding and mutually joins before end face peripheral chamfer；Middle position in the slot type decorative pattern 523 of outer circumference surface Line 5232 the most corresponding with the radial direction neutrality line 5212 in the slot type decorative pattern 521 of left side and before end face peripheral chamfer phase Handing-over mutually；Axial low-bit line 5233 in the slot type decorative pattern 523 of outer circumference surface and the radial direction in the slot type decorative pattern 521 of left side Low-bit line 5213 is the most corresponding and mutually joins (as shown in figure 16) before end face peripheral chamfer；

Axial high bit line 5231 in the slot type decorative pattern 523 of outer circumference surface is high-order with the radial direction in the slot type decorative pattern 522 of right side Line 5221 is the most corresponding and mutually joins before end face peripheral chamfer；Middle position in the slot type decorative pattern 523 of outer circumference surface Line 5232 the most corresponding with the radial direction neutrality line 5222 in the slot type decorative pattern 522 of right side and before end face peripheral chamfer phase Handing-over mutually；Axial low-bit line 5233 in the slot type decorative pattern 523 of outer circumference surface and the radial direction in the slot type decorative pattern 522 of right side Low-bit line 5223 is the most corresponding and mutually joins (as shown in figure 18) before end face peripheral chamfer.

When the outer circumference surface in described mid-game 52 also is provided with slot type decorative pattern, and make outer circumference surface slot type decorative pattern 523 shape with The shape of the slot type decorative pattern (521 and 522) of left and right end face is identical, and the axial wheel of the slot type decorative pattern 523 of outer circumference surface When the radial profile of the slot type decorative pattern (521 and 522) of profile and left and right end face is respectively formed one_to_one corresponding and mutually joins, Pressurization gas produced by the slot type decorative pattern (521 and 522) of inner disc both ends of the surface can be made the most constantly toward excircle from axle center Carrying in the recess channels that the slot type decorative pattern 523 in face is formed, running up the air film needed for bearing so that forming higher support, And air film is i.e. as the lubricant of kinetic pressure gas thrust bearing, thus can be further assured that described hybrid dynamic pressure air thrust Bearing high speed steady running under air supporting state, is further ensured that for realizing the high limit rotating speed offer of motor.

The inner face of side panel 51 is provided with the draw-in groove 513 (as shown in figure 14) for fixing foil-type elastic component 53.

Described foil-type elastic component 53 is preferably 0.003～0.008mm, to further ensure that axle with the fit clearance of mid-game 52 Hold the reliability and stability run up.

In order to preferably meet the performance requirement run up, described foil-type elastic component 53 is preferably through Surface heat-treatent.

It is further to note that: the composition structure of foil-type elastic component 53 of the present invention is not limited to described in above-described embodiment, Ripple paper tinsel peace paper tinsel can also be used to form, but between the ripple of described ripple paper tinsel arch, transition base fits with flat paper tinsel, or, directly adopt Form with two flat paper tinsels, or use other existing structure.

Embodiment 4

Shown in Figure 19 and Figure 20: offer heat radiation helicla flute 32 on the surface of rotating shaft 3, be beneficial to rotating shaft and bearing chamber Heat radiation.

After tested, the bearing that the present invention provides can reach 100,000～450 under air supporting state, the limit speed of 000rpm, because of This is for equal-wattage requirement, and the present invention can make the volume of turbojet engine be substantially reduced realization miniaturization, to promoting miniaturization The development of new and high technology has important value.

Finally be necessary it is pointed out here that: above content is served only for being described in further details technical scheme of the present invention, It is not intended that limiting the scope of the invention, those skilled in the art make according to the foregoing of the present invention one A little nonessential improvement and adjustment belong to protection scope of the present invention.

Claims

1. a ultrahigh speed turbojet engine, including turbine, compressor, rotating shaft, 2 journal bearings, 1 thrust shaft Holding and combustor, described turbine includes turbine, turbine air deflector and turbine cylinder, described compressor include pinch roller, Compressor diffuser and compressor housings；It is characterized in that: described journal bearing is slot type kinetic pressure gas journal bearing, including Bearing outside and bearing inner sleeve；Described thrust bearing is hybrid kinetic pressure gas thrust bearing, including two side panels and sandwiched Mid-game between two side panels, is equipped with foil-type elastic component between each side panel and mid-game；Described combustor is set in and turns The middle part of axle, 2 journal bearings are respectively sleeved in the rotating shaft being positioned at combustor, and described thrust bearing is set in and is positioned at burning In rotating shaft between room and pinch roller.

Ultrahigh speed turbojet engine the most according to claim 1, it is characterised in that: described little Micro Turbine Jet Engine Also include turbine support, compressor support, rotating shaft set, bearing holder (housing, cover) and left bearing room end cap and right bearing room end cap, described Rotating shaft set is set in rotating shaft, and journal bearing and thrust bearing are all set in rotating shaft and put, and described bearing holder (housing, cover) is set in radial axle Hold the outside with thrust bearing；Turbine cylinder is fixing with turbine support to be connected, and turbine support is solid with the housing of combustor Fixed connection, turbine support is fixing with turbine air deflector to be connected, and turbine air deflector is fixing with left bearing room end cap to be connected； Compressor housings is fixing with compressor support to be connected；The housing of compressor support and combustor is fixing to be connected, compressor support and Compressor diffuser is fixing to be connected, and compressor diffuser is fixing with right bearing room end cap to be connected.

Ultrahigh speed turbojet engine the most according to claim 1 and 2, it is characterised in that: the surface of described rotating shaft is offered There is heat radiation helicla flute.

Ultrahigh speed turbojet engine the most according to claim 1, it is characterised in that: the outer circumference surface of described bearing inner sleeve With the slot type decorative pattern that both ends of the surface are respectively provided with regular shape.

Ultrahigh speed turbojet engine the most according to claim 4, it is characterised in that: the end face of described bearing inner sleeve The slot type decorative pattern of slot type decorative pattern and other end forms specular, and the axial profile line of the slot type decorative pattern of outer circumference surface with The radial profile of the slot type decorative pattern of both ends of the surface is respectively formed one_to_one corresponding and mutually joins.

Ultrahigh speed turbojet engine the most according to claim 5, it is characterised in that: the outer circumference surface of described bearing inner sleeve Slot type decorative pattern in axial high bit line bit line high with the radial direction in the slot type decorative pattern of both ends of the surface the most corresponding and at end face circumference Mutually join before chamfering；Axial neutrality line in the slot type decorative pattern of outer circumference surface and position in the radial direction in the slot type decorative pattern of both ends of the surface Line is the most corresponding and mutually joins before end face peripheral chamfer；Axial low-bit line in the slot type decorative pattern of outer circumference surface and two ends Radial direction low-bit line in the slot type decorative pattern in face is the most corresponding and mutually joins before end face peripheral chamfer.

Ultrahigh speed turbojet engine the most according to claim 1, it is characterised in that: on the excircle of described bearing outside Having coaxial through hole and shrinkage pool, described through hole is positioned at coaxial shrinkage pool.

Ultrahigh speed turbojet engine the most according to claim 1, it is characterised in that: the both ends of the surface of described mid-game are equipped with The slot type decorative pattern of regular shape, and the slot type decorative pattern formation specular of the slot type decorative pattern of end face and other end.

Ultrahigh speed turbojet engine the most according to claim 8, it is characterised in that: described mid-game outer circumference surface also It is provided with slot type decorative pattern, and the shape of the slot type decorative pattern of outer circumference surface is identical with the shape of the slot type decorative pattern of both ends of the surface, and cylindrical The axial profile line of the slot type decorative pattern of side face is respectively formed one_to_one corresponding with the radial profile of the slot type decorative pattern of both ends of the surface and mutually hands over Connect.

Ultrahigh speed turbojet engine the most according to claim 9, it is characterised in that: the slot type of the outer circumference surface of mid-game Axial high bit line bit line high with the radial direction in the slot type decorative pattern of both ends of the surface in decorative pattern is the most corresponding and before end face peripheral chamfer Mutually handing-over；Axial neutrality line in the slot type decorative pattern of outer circumference surface is homogeneous with the radial direction neutrality line in the slot type decorative pattern of both ends of the surface Correspondence also mutually joins before end face peripheral chamfer；Axial low-bit line in the slot type decorative pattern of outer circumference surface and the groove of both ends of the surface Radial direction low-bit line in formula decorative pattern is the most corresponding and mutually joins before end face peripheral chamfer.

11. ultrahigh speed turbojet engines according to claim 1, it is characterised in that: it is fixed on the paper tinsel on a side panel Type elastic component forms specular with the foil-type elastic component being fixed on another side panel.

12. according to the ultrahigh speed turbojet engine described in claim 1 or 11, it is characterised in that: described foil-type elastic component Being made up of ripple paper tinsel peace paper tinsel, the arc convex top of described ripple paper tinsel fits with flat paper tinsel.

13. according to the ultrahigh speed turbojet engine described in claim 1 or 11, it is characterised in that: described foil-type elastic component Being made up of ripple paper tinsel peace paper tinsel, between the ripple arch of described ripple paper tinsel, transition base fits with flat paper tinsel.

14. according to the ultrahigh speed turbojet engine described in claim 1 or 11, it is characterised in that: described foil-type elastic component It is made up of two flat paper tinsels.