阅读说明：本技术 封严通气结构 (Obturage ventilation device ) 是由 马立恒 杨春华 刘昌华 倪慧妍 吴瑶 于 2019-07-31 设计创作，主要内容包括：本发明公开了一种封严通气结构,包括：涡轮转轴、装设于涡轮转轴上的支承轴承、连接于燃烧室机匣上的后轴承座、装设于涡轮转轴上且与后轴承座固定的封严通气环组、连接于涡轮转轴输出端上的转盘、一端与后轴承座相连另一端套设于转盘外以在后轴承座与转盘间围设出气流通道的封严圈及调压排气装置。封严通气环组位于封严圈内且端面抵靠后轴承座的端面,封严通气环组与后轴承座内的高压气流流道和气流通道连通。封严通气环组还与调压排气装置连通以在调压排气装置的作用下调节封严通气环组两侧的压力差,使高压气流由气流通道经封严通气环组进入调压排气装置以形成密封环流,进而使封严通气环组内两道同轴设置的密封结构形成两道气密封结构。(The invention discloses one kind to obturage ventilation device, comprising: turbine shaft, the bearing support being installed in turbine shaft, the rear bearing block being connected on combustion box, be installed in turbine shaft and with rear bearing block it is fixed obturage ventilation ring group, the turntable being connected on turbine shaft output end, one end be connected with rear bearing block the other end be sheathed on outside turntable with enclosed between rear bearing block and turntable set out airflow channel obturage circle and Pressure Regulation Exhaust device.Obturage ventilation ring group and be located at and obturage in circle and end face is against the end face of rear bearing block, obturage ventilation ring group in rear bearing block high pressure draught runner and airflow channel be connected to.Ventilation ring group is obturaged also to be connected to Pressure Regulation Exhaust device to adjust the pressure difference for obturaging ventilation ring group two sides under the action of Pressure Regulation Exhaust device, so that high pressure draught is obturaged ventilation ring group by airflow channel and enter Pressure Regulation Exhaust device to form sealing circulation, and then makes to obturage the sealing structure that twice are coaxially disposed in ventilation ring group and form twice air-tight structure.)

1. one kind obturages ventilation device characterized by comprising

Turbine shaft (10), is connected on combustion box and uses the bearing support (20) being installed on the turbine shaft (10) In the rear bearing block (30) of the bearing support (20) is installed, be installed on the turbine shaft (10) and with the rear bearing block (30) fixed turntable (50), one end and the institute obturaging ventilation ring group (40), being connected on the turbine shaft (10) output end It states rear bearing block (30) connected other end and is sheathed on the turntable (50) outside in the rear bearing block (30) and the turntable (50) enclosed between set out airflow channel in a ring (60) obturage circle (70) and for adjusting pressure and exhaust Pressure Regulation Exhaust dress It sets；

It is described obturage ventilation ring group (40) be located at it is described obturage that circle (70) is interior and end face is against the end face of the rear bearing block (30), The high pressure draught runner (301) and the airflow channel (60) obturaged in ventilation ring group (40) and the rear bearing block (30) Connection introduces the high pressure draught in the high pressure draught runner (301) in the airflow channel (60)；

The ventilation ring group (40) of obturaging also is connected under the action of the Pressure Regulation Exhaust device with the Pressure Regulation Exhaust device The pressure difference that ventilation ring group (40) two sides are obturaged described in adjusting obturages high pressure draught as described in the airflow channel (60) warp logical Compression ring group (40) enters the Pressure Regulation Exhaust device to form sealing circulation, and then makes described to obturage ventilation ring group (40) interior twice The sealing structure of coaxial arrangement forms air-tight structure, to seal the bearing installation cavity (304) for installing the bearing support (20) Outlet, prevent the bearing installation cavity (304) to be connected to the airflow channel (60).

2. according to claim 1 obturage ventilation device, which is characterized in that

It is described obturage ventilation ring group (40) include first obturage ring (41), second obturage ring (42), with described first obturage ring (41) the first comb ring gear (43) for being equipped with and the second comb ring gear (44) that ring (42) is equipped with is obturaged with described second；

The first comb ring gear (43) and the second comb ring gear (44) is installed on the turbine shaft (10) along axial direction and institute It states the second comb ring gear (44) and is partially sheathed on the first comb ring gear (43) outside, the first end contact of the first comb ring gear (43) The bearing support (20), the first end of the second comb ring gear (44) described in the second end contact of the first comb ring gear (43), institute It states in turbine shaft (10) described in the second end contact of the second comb ring gear (44) for installing the mounting flange of the turntable (50) (101)；

Described first obturages that ring (41) is sheathed on the first comb ring gear (43) and end face is against the rear bearing block (30) End face, described first obturage ring (41) for the first comb ring gear (43) formed first of air-tight structure, described second Ring (42) is obturaged to obturage ring (41) coaxial arrangement with described first and be connected to be formed between the two and the Pressure Regulation Exhaust device The pressure regulating cavity (401) of connection, the pressure regulating cavity (401) are connected to the airflow channel (60) and the bearing installation cavity (304), Described second obturages ring (42) for forming second air-tight structure with the second comb ring gear (44).

3. according to claim 2 obturage ventilation device, which is characterized in that

Described first, which obturages ring (41) includes hollow tubular first, obturages cylinder (411) and obturages cylinder (411) with described first External annulus is connected and the first mounting disc (412) annular in shape, first mounting disc (412) are installed in the rear bearing block (30) In rabbet groove on end face, described first, which obturages cylinder (411), is sheathed on the first comb ring gear (43)；

Described second, which obturages ring (42) includes hollow tubular second, obturages cylinder (421) and obturages cylinder (421) with described second External annulus is connected and the second mounting disc (422) annular in shape, the end face of second mounting disc (422) and first mounting disc (412) end face is fixedly connected to be formed between the two the pressure regulating cavity (401), and described second, which obturages cylinder (421), is set in institute First is stated to obturage cylinder (411) outside and be sheathed on the second comb ring gear (44).

4. according to claim 3 obturage ventilation device, which is characterized in that

Described first obturage cylinder (411) and described second obturage cylinder (421) inner wall get on the bus and roll after the helicla flute axially extended Flower；

Described first, which obturages cylinder (411) and described second, obturages on the inner wall of cylinder (421) coated with equadag coating (45).

5. according to claim 4 obturage ventilation device, which is characterized in that

Described first gap obturaged between equadag coating (45) and the first comb ring gear (43) outer ring surface on cylinder (411) is 0.05mm~0.095mm；

Described second gap obturaged between equadag coating (45) and the second comb ring gear (44) outer ring surface on cylinder (421) is 0.05mm~0.095mm.

6. according to claim 3 obturage ventilation device, which is characterized in that

First mounting disc (412) is equipped with the through hole (4121) and intercommunicating pore (4122) of multiple perforations；

Multiple through holes (4121) are equipped with multiple mounting holes on the rear bearing block (30) end face respectively, described Obturage ventilation ring group (40) by pass through the connector of the through hole (4121) and the mounting hole being correspondingly arranged with it is described Rear bearing block (30) detachable connection；

Multiple intercommunicating pores (4122) are correspondingly arranged with multiple ventholes on the rear bearing block (30) end face respectively, so that High pressure draught in the high pressure draught runner (301) enters the gas by the venthole and the intercommunicating pore (4122) afterwards In circulation road (60).

7. according to claim 6 obturage ventilation device, which is characterized in that

Multiple through holes (4121) are arranged along the circumferential uniform intervals of first mounting disc (412)；

Multiple intercommunicating pores (4122) are arranged along the circumferential uniform intervals of first mounting disc (412), and the through hole (4121) it is located on the same circle of first mounting disc (412) with the intercommunicating pore (4122), and the through hole (4121) It is laid staggeredly with the intercommunicating pore (4122).

8. according to claim 3 obturage ventilation device, which is characterized in that

It is additionally provided with pulling out for multiple perforations on first mounting disc (412) to unload hole (4123), multiple described pull out unload hole (4123) edge The circumferential uniform intervals of first mounting disc (412) are laid.

9. according to claim 3 obturage ventilation device, which is characterized in that

Indent is equipped with and arc-shaped gas storage towards the bearing surface of the rear bearing block (30) on first mounting disc (412) Slot (4124), the slot bottom of the air reservoir (4124) are equipped with multiple gas vents (4125) through first mounting disc (412)；

The air reservoir (4124) is connected to the Pressure Regulation Exhaust device, the gas vent (4125) and the pressure regulating cavity (401) Connection, so that after the blanket gas stream in the pressure regulating cavity (401) is by the gas vent (4125) and the air reservoir (4124) It is discharged into the Pressure Regulation Exhaust device, also makes the Pressure Regulation Exhaust device to the sealing air-flow in the pressure regulating cavity (401) Pressure is adjusted.

10. according to claim 9 obturage ventilation device, which is characterized in that

The Pressure Regulation Exhaust device include the conduit being connected to the air reservoir (4124), be connected to the conduit it is replaceable It pressure regulation pad, the exhaust pipe being connected to the regulator hole on the pressure regulation pad and is connected to the exhaust pipe with will be in the exhaust pipe The exhaust component that air-flow discharges；

The pressure regulation pad is removable installed in the pressure modulating opening of combustion box.

Technical field

The present invention relates to aero-engine fields, particularly, are related to one kind and obturage ventilation device.

Background technique

Gap is equipped between each turn of aero-engine, stator, the chargeoil for lubricating bearing can be revealed from the gap location, into And so that the lubricating condition of bearing is degenerated, and increase lube use rate, for guarantee engine long-term work reliability, in engine Inside setting densification device.Densification device is equipped in existing whirlpool paddle type aero-engine, at combustion box rear bearing block with right The chargeoil of lubrication bearing is obturaged, and prevents chargeoil from leaking into airflow channel to control lube use rate.This obturages dress It is set to single track sealing structure and obturages that pressure is unadjustable, and effect is poor so obturaging, cannot reach and block lubricating oil, prevent leakage Effect, and seal structure is complicated, installation centering is difficult, causes to obturage eccentric place, eccentric wear and abnormal sound, it is normal not to be able to satisfy engine Requirement.

Summary of the invention

The present invention provides one kind to obturage ventilation device, obturages that effect is poor, obturages pressure to solve existing densification device It is unadjustable, cannot achieve the effect that block lubricating oil, prevent the technical issues of leakage.

The technical solution adopted by the invention is as follows:

One kind obturaging ventilation device, comprising: turbine shaft, is connected to burning at the bearing support being installed in turbine shaft For installing the rear bearing block of bearing support, being installed in turbine shaft and obturaging ventilation with what rear bearing block was fixed on the casing of room Ring group, the turntable being connected on turbine shaft output end, one end are connected with rear bearing block, and to be sheathed on turntable outer rear for the other end Enclosed between bearing block and turntable set out airflow channel in a ring obturage circle and for adjusting pressure and exhaust Pressure Regulation Exhaust dress It sets；It obturages ventilation ring group and is located at and obturage in circle and end face is against the end face of rear bearing block, obturage in ventilation ring group and rear bearing block High pressure draught runner be connected to airflow channel, high pressure draught in high pressure draught runner is introduced in airflow channel；It obturages Ventilation ring group is also connected to adjust the pressure for obturaging ventilation ring group two sides under the action of Pressure Regulation Exhaust device with Pressure Regulation Exhaust device Power is poor, so that high pressure draught is obturaged ventilation ring group by airflow channel and enters Pressure Regulation Exhaust device to form sealing circulation, and then makes It obturages the sealing structure that twice are coaxially disposed in ventilation ring group and forms air-tight structure, to seal the bearing peace of installation bearing support The outlet behaveing affectedly prevents bearing installation cavity to be connected to airflow channel.

Further, obturage ventilation ring group include first obturage ring, second obturage ring, with first obturage what ring was equipped with First comb ring gear and the second comb ring gear that ring is equipped with is obturaged with second；First comb ring gear and the second comb ring gear are along axial installing In in turbine shaft and the second comb toothed ring section is sheathed on outside the first comb ring gear, the first end contact support shaft of the first comb ring gear It holds, the first end of second end contact the second comb ring gear of the first comb ring gear, in the second end contact turbine shaft of the second comb ring gear For installing the mounting flange of turntable；First obturages ring set on the first comb ring gear and end face is against the end face of rear bearing block, First obturages ring for forming first of air-tight structure with the first comb ring gear, and second, which obturages ring and first, obturages ring coaxial arrangement And it is connected to form the pressure regulating cavity being connected to Pressure Regulation Exhaust device, pressure regulating cavity and airflow channel and bearing installation cavity between the two and connect Logical, second obturages ring for forming second air-tight structure with the second comb ring gear.

Further, the first the first external annulus obturaged cylinder and obturage cylinder with first for obturaging that ring includes hollow tubular is connected And the first mounting disc annular in shape, the first mounting disc are installed in the rabbet groove on rear bearing block end face, first, which obturages cylinder, is arranged In on the first comb ring gear；Second obturage ring includes hollow tubular second obturage cylinder and the external annulus of obturaging cylinder with second be connected and Second mounting disc annular in shape, the end face of the second mounting disc are fixedly connected to form tune between the two with the end face of the first mounting disc Press chamber, second, which obturages cylinder, is set in first to obturage cylinder outer and be sheathed on the second comb ring gear.

Further, first obturage cylinder and second obturage cylinder inner wall get on the bus annular knurl after the helicla flute axially extended；The One, which obturages cylinder and second, obturages on the inner wall of cylinder coated with equadag coating.

Further, first obturage gap between the equadag coating and the first comb ring gear outer ring surface on cylinder be 0.05mm~ 0.095mm；Second gap obturaged between equadag coating and the second comb ring gear outer ring surface on cylinder is 0.05mm~0.095mm.

Further, the first mounting disc is equipped with the through hole and intercommunicating pore of multiple perforations；Multiple through holes respectively with it is rear Multiple mounting holes on bearing block end face are equipped with, and are obturaged ventilation ring group and are passed through the mounting hole that is threaded through hole He is correspondingly arranged Connector and rear bearing block detachable connection；Multiple intercommunicating pores are corresponding with multiple ventholes on rear bearing block end face respectively Setting, so that the high pressure draught in high pressure draught runner after venthole and intercommunicating pore by entering in airflow channel.

Further, multiple through holes are arranged along the circumferential uniform intervals of the first mounting disc；Multiple intercommunicating pores are along the first peace The circumferential uniform intervals of sabot are arranged, and through hole and intercommunicating pore are located on the same circle of the first mounting disc, and through hole and company Through-hole is laid staggeredly.

Further, it is additionally provided with pulling out for multiple perforations in the first mounting disc and unloads hole, multiple pull out unloads hole along the first mounting disc Circumferential uniform intervals are laid.

Further, indent is equipped with and arc-shaped air reservoir towards the bearing surface of rear bearing block in the first mounting disc, The slot bottom of air reservoir is equipped with multiple gas vents through the first mounting disc；Air reservoir is connected to Pressure Regulation Exhaust device, gas vent with Pressure regulating cavity connection, so that the blanket gas stream in pressure regulating cavity is discharged by entering Pressure Regulation Exhaust device after gas vent and air reservoir, also The pressure for the sealing air-flow for keeping Pressure Regulation Exhaust device intracavitary to pressure regulation is adjusted.

Further, Pressure Regulation Exhaust device includes the conduit being connected to air reservoir, the replaceable pressure regulation being connected to conduit Pad, the exhaust pipe that is connected to the regulator hole on pressure regulation pad and row to discharge the air-flow in exhaust pipe is connected to exhaust pipe Gas component；Pressure regulation pad is removable installed in the pressure modulating opening of combustion box.

The invention has the following advantages:

Of the invention obturages in ventilation device, and the pressure for obturaging ventilation ring group two sides is adjusted by setting Pressure Regulation Exhaust device Difference makes high pressure draught be obturaged ventilation ring group by airflow channel and enters Pressure Regulation Exhaust device to form sealing circulation, and then makes to seal The sealing structure of twice coaxial arrangement forms twice air-tight structure in tight ventilation ring group, and what ventilation ring group was obturaged in enhancing obturages effect Fruit reaches and blocks lubricating oil in bearing installation cavity, prevents in oil leakage to airflow channel；The pressure of ventilation ring group two sides is obturaged again Difference can be adjusted by Pressure Regulation Exhaust device, and then obturage the pressure of the bearing installation cavity between ventilation ring group and bearing support It is adjustable, prevent from obturaging stream pressure in bearing installation cavity being easy very much to make lubricating oil in turbine axocoel and bearing installation cavity to have excessive bubble greatly Foam and the lubricating oil film at bearing support is blown down, at the same prevent from obturaging in bearing installation cavity stream pressure too it is small cause to obturage it is logical The pressure difference of compression ring group two sides is too big, and then influence to obturage ventilation ring group obturages effect；Of the invention obturages ventilation device knot Structure is simple and effect is good, it is the air pressure difference for guaranteeing to obturage ventilation ring group front and rear sides by sealing circulation structure is formed, And then so that air is flowed through this and obturage the annular gap of very little in ventilation ring group, to achieve the effect that block lubricating oil, prevent leakage

Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention. Below with reference to figure, the present invention is described in further detail.

Detailed description of the invention

The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:

Fig. 1 is the section view schematic view of the front view for obturaging ventilation device of the preferred embodiment of the present invention；

Fig. 2 be in Fig. 1 first obturage ring and second obturage ring connection when section view schematic view of the front view；

Fig. 3 is the first left view structural representation for obturaging ring in Fig. 2；

Fig. 4 is the first partial enlargement structural representation for obturaging ring in Fig. 2.

Marginal data

10, turbine shaft；101, mounting flange；20, bearing support；30, rear bearing block；301, high pressure draught runner； 302, turbine axocoel；304, bearing installation cavity；40, ventilation ring group is obturaged；401, pressure regulating cavity；41, first ring is obturaged；411, first Obturage cylinder；412, the first mounting disc；4121, through hole；4122, intercommunicating pore；4123, it pulls out and unloads hole；4124, air reservoir；4125, it arranges Stomata；42, second ring is obturaged；421, second cylinder is obturaged；422, the second mounting disc；43, the first comb ring gear；44, the second comb ring gear； 45, equadag coating；50, turntable；60, airflow channel；70, circle is obturaged.

Specific embodiment

The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be limited by following and The multitude of different ways of covering is implemented.

Referring to Fig.1, the preferred embodiment of the present invention provides one kind and obturages ventilation device, comprising: turbine shaft 10, installing In in turbine shaft 10 bearing support 20, be connected on combustion box for install bearing support 20 rear bearing block 30, Be installed in turbine shaft 10 and with rear bearing block 30 is fixed obturages ventilation ring group 40, is connected on 10 output end of turbine shaft Turntable 50, one end other end that is connected with rear bearing block 30 be sheathed on that turntable 50 is outer to be set to enclose between rear bearing block 30 and turntable 50 Obturaging for airflow channel 60 in a ring encloses 70 and the Pressure Regulation Exhaust device (not shown) for adjusting pressure and exhaust out.It obturages Ventilation ring group 40 be located at obturage circle 70 in and end face against the end face of rear bearing block 30, obturage ventilation ring group 40 and rear bearing block 30 Interior high pressure draught runner 301 is connected to airflow channel 60, and the high pressure draught in high pressure draught runner 301 is introduced air-flow and is led to In road 60.Ventilation ring group 40 is obturaged also to be connected to Pressure Regulation Exhaust device to adjust under the action of Pressure Regulation Exhaust device and obturage ventilation The pressure difference of 40 two sides of ring group makes high pressure draught be obturaged ventilation ring group 40 by airflow channel 60 and enters Pressure Regulation Exhaust device with shape At sealing circulation, and then makes to obturage the sealing structure that twice are coaxially disposed in ventilation ring group 40 and form twice air-tight structure, with The outlet of the bearing installation cavity 304 of sealing installation bearing support 20, prevents bearing installation cavity 304 to be connected to airflow channel 60.

The of the invention high pressure gas that when obturaging ventilation device work, the indoor high pressure draught that burns enters in rear bearing block 30 It flows in runner 301, is then entered in airflow channel 60 by obturaging ventilation ring group 40 again, it is high into the part in airflow channel 60 Pressure gas stream passes through the gap cooling rotary plate 50 and working-blade tenon obturaged between circle 70 and 50 periphery wall of turntable；It is logical into air-flow Another part high pressure draught in road 60 removes the disks at different levels after cooling rotary plate 50 by the centre bore (not shown) of turntable 50；Into Rest part high pressure draught in airflow channel 60, which enters, to be obturaged in ventilation ring group 40, and enters the portion obturaged in ventilation ring group 40 Divide air-flow to enter back into Pressure Regulation Exhaust device and seal circulation to be formed, and then makes to obturage what twice in ventilation ring group 40 were coaxially disposed Sealing structure forms air-tight structure, to seal the outlet of the bearing installation cavity 304 of installation bearing support 20, prevents bearing from installing Chamber 304 is connected to airflow channel 60；Bearing installation cavity 304 is entered back into the rest part air-flow obturaged in ventilation ring group 40 It is interior, and by entering turbine wheel shaft chamber after bearing support 20, finally entered in Pressure Regulation Exhaust device by turbine axocoel again.

Of the invention obturages in ventilation device, and the pressure for obturaging 40 two sides of ventilation ring group is adjusted by setting Pressure Regulation Exhaust device Power is poor, make high pressure draught by airflow channel 60 obturaged ventilation ring group 40 enter Pressure Regulation Exhaust device to form sealing circulation, into And make to obturage the sealing structure that twice are coaxially disposed in ventilation ring group 40 and form twice air-tight structure, ventilation ring group is obturaged in enhancing 40 obturage effect, reach and block lubricating oil in bearing installation cavity 304, prevent in oil leakage to airflow channel 60；It obturages again logical The pressure difference of 40 two sides of compression ring group can be adjusted by Pressure Regulation Exhaust device, and then obturage ventilation ring group 40 and bearing support 20 Between bearing installation cavity 304 pressure adjustable, prevent from obturaging stream pressure in bearing installation cavity 304 being easy greatly very much to make turbine wheel shaft Lubricating oil has excessive foam and blows down the lubricating oil film at bearing support 20 in chamber 302 and bearing installation cavity 304, while preventing axis It holds and obturages that stream pressure is too small to cause the pressure difference for obturaging 40 two sides of ventilation ring group too big in installation cavity 304, and then influence to obturage Ventilation ring group 40 obturages effect；Of the invention to obturage that ventilation device structure is simple and effect is good, it is by forming sealing ring Flow structure guarantees to obturage the air pressure difference of 40 front and rear sides of ventilation ring group, and then so that air is flowed through this and obturage in ventilation ring group 40 The annular gap of very little, to achieve the effect that block lubricating oil, prevent leakage.

Optionally, as depicted in figs. 1 and 2, obturage ventilation ring group 40 include first obturage ring 41, second obturage ring 42, with First obturages the first comb ring gear 43 that ring 41 is equipped with and obturages the second comb ring gear 44 that ring 42 is equipped with second.First Comb ring gear 43 and the second comb ring gear 44 are installed in turbine shaft 10 along axial direction and 44 part of the second comb ring gear is sheathed on the first comb Outside ring gear 43, the first end contact bearing support 20 of the first comb ring gear 43, second end contact the second comb tooth of the first comb ring gear 43 The first end of ring 44, for installing the mounting flange 101 of turntable 50 in the second end contact turbine shaft 10 of the second comb ring gear 44. First obturages that ring 41 is sheathed on the first comb ring gear 43 and end face is against the end face of rear bearing block 30, first obturage ring 41 for First comb ring gear 43 formed first of air-tight structure, second obturage ring 42 with first obturage ring 41 be coaxially disposed and be connected with The pressure regulating cavity 401 being connected to Pressure Regulation Exhaust device, pressure regulating cavity 401 and airflow channel 60 and bearing installation cavity 304 are formed between the two Connection, second obturages ring 42 for forming second air-tight structure with the second comb ring gear 44.When work, in airflow channel 60 The gap that partial high pressure air-flow obturages between ring 42 and the second comb ring gear 44 by second, which enters pressure regulating cavity 401 and formed, obturages gas It flows, the airflow portion of obturaging in pressure regulating cavity 401 enters back into Pressure Regulation Exhaust device, is adjusted with adjusting under the action of Pressure Regulation Exhaust device Obturage the pressure of obturaging of air-flow in pressure chamber 401, the rest part in pressure regulating cavity 401 obturage air-flow pass through again first obturage ring 41 with Gap between first comb ring gear 43 enters bearing installation cavity 304, obturages air-flow across bearing support in bearing installation cavity 304 Mist of oil is formed after 20 and enters turbine axocoel 302, and the mist of oil in turbine axocoel 302 flows into oil mist separator, mist of oil separation through conduit Mist of oil is separated into lubricating oil and air by device, and lubricating oil leaks into accessory drive gearbox inner cavity, and air is then discharged into exhaust apparatus through conduit and bend pipe.

In this optinal plan embodiment, as depicted in figs. 1 and 2, first, which obturages ring 41 includes hollow tubular first, is obturaged Cylinder 411 and the external annulus for obturaging cylinder 411 with first are connected and the first mounting disc 412 annular in shape, the first mounting disc 412 are installed in In rabbet groove on 30 end face of rear bearing block, first, which obturages cylinder 411, is sheathed on the first comb ring gear 43.Second, which obturages ring 42, includes The second of hollow tubular obturages cylinder 421 and the external annulus of obturaging cylinder 421 with second is connected and the second mounting disc 422 annular in shape, The end face of second mounting disc 422 is fixedly connected to form pressure regulating cavity 401 between the two with the end face of the first mounting disc 412, and second Cylinder 421 is obturaged to be set in first to obturage cylinder 411 outer and be sheathed on the second comb ring gear 44.In this specific embodiment, first is obturaged Ring 41 and second is obturaged ring 42 and is an integral molding structure, and is conducive to enhancing first and obturages ring 41 and second to obturage the structure of ring 42 Intensity, and obturage ring 41 and second convenient for first and obturage the preparation of ring 42.The end face of second mounting disc 422 and the first mounting disc 412 end face is welded and fixed, convenient for obturaging the fixed and positioned of ventilation ring group 40.In process, ring 41 first is obturaged to first It obturages 42 single-piece of ring with second to be processed respectively, then again by two group weldings at component, this processing method is convenient, and can Improve the precision of single-piece and component processing.

Preferably, as shown in Figure 2 and Figure 4, first obturage cylinder 411 and second obturage cylinder 421 inner wall get on the bus and prolong along axial direction Annular knurl after the helicla flute stretched.First, which obturages cylinder 411 and second, obturages on the inner wall of cylinder 421 coated with equadag coating 45.It is practical to add Working hour first obturages cylinder 411 and the first comb ring gear 43, second obturages envelope between cylinder 421 and the second comb ring gear 44 to reduce Tight gap avoids comb tooth when work on comb ring gear from scratching the parent metal for obturaging an internal perisporium, so cylinder 411 is obturaged first Equadag coating 45 is respectively coated on the inner wall for obturaging cylinder 421 with second, before coating equadag coating 45, obturages cylinder first 411 and second obturage cylinder 421 inner wall get on the bus annular knurl after the helicla flute axially extended, to increase and the contact of equadag coating 45 Area and contact surface roughness guarantee that equadag coating 45 is obturaged cylinder 411 and second with first and obturaged in conjunction with the metallic matrix of cylinder 421 Securely, equadag coating chip off-falling is prevented.

Preferably, as shown in Figure 1, first obturages between 43 outer ring surface of the equadag coating 45 on cylinder 411 and the first comb ring gear Gap be 0.05mm~0.095mm.Second obturages between 44 outer ring surface of the equadag coating 45 on cylinder 421 and the second comb ring gear Gap is 0.05mm~0.095mm.The gap that twice are obturaged between the equadag coating 45 on cylinder and comb ring gear outer ring surface is 0.05mm~0.095mm, if the gap is less than normal, after engine operation due to rotor sink with initial assembled state have on a small quantity it is poor Different, after engine test in cold conditions, the gap obturaged between the equadag coating on cylinder and comb ring gear outer ring surface disappears, in turn Cause to turn to generate abnormal sound phenomenon due to contact friction between stator, influences engine normal use.

In this optinal plan embodiment, as shown in figures 1 and 3, the first mounting disc 412 is equipped with the through hole of multiple perforations 4121 and intercommunicating pore 4122.Multiple through holes 4121 are equipped with multiple mounting holes on 30 end face of rear bearing block respectively, envelope Tight ventilation ring group 40 is detachable by the connector and rear bearing block 30 that are threaded through hole 4121 and the mounting hole being correspondingly arranged Connection.Multiple intercommunicating pores 4122 are correspondingly arranged with multiple ventholes on 30 end face of rear bearing block respectively, so that high pressure draught stream High pressure draught in road 301 after venthole and intercommunicating pore 4122 by entering in airflow channel 60.Of the invention obturages ventilation ring Group 40 uses the connectors such as screw, bolt and rear bearing block by the rabbet groove positioning on combustion box rear bearing block 30 30 detachable fixations, this kind positioning, fixing means centering precision are high, will not occur to cause to obturage gap because centering precision is not high It is uneven to cause engine abnormal noise in turn, vibrate and obturage the problems such as effect is poor.

Preferably, as shown in figure 3, multiple through holes 4121 are arranged along the circumferential uniform intervals of the first mounting disc 412.It is multiple Intercommunicating pore 4122 is arranged along the circumferential uniform intervals of the first mounting disc 412, and through hole 4121 and intercommunicating pore 4122 are located at first On the same circle of mounting disc 412, and through hole 4121 and intercommunicating pore 4122 are laid staggeredly, through hole 4121 and intercommunicating pore 4122 This kind lays mode, is conducive to first and obturages the processing of ring 41, preparation.

In this optinal plan embodiment, as shown in figure 3, being additionally provided with pulling out for multiple perforations in the first mounting disc 412 unloads hole 4123, it is multiple to pull out the circumferential uniform intervals laying for unloading hole 4123 along the first mounting disc 412.When due to assembly, first obturages ring 41 Fit engagement surface be coated with sealant, dismantle very difficult, unloaded by the way that pulling out for multiple perforations is arranged in the first mounting disc 412 Hole 4123 obturages pulling out for ring 41 as decomposition first and unloads hole, is conducive to quick, laborsaving pull out that first obturages ring 41 and unloads.

In this optinal plan embodiment, as shown in figures 1 and 3, towards the abutting of rear bearing block 30 in the first mounting disc 412 Face is equipped with indent and arc-shaped air reservoir 4124, and the slot bottom of air reservoir 4124 is equipped with through the multiple of the first mounting disc 412 Gas vent 4125.Air reservoir 4124 is connected to Pressure Regulation Exhaust device, and gas vent 4125 is connected to pressure regulating cavity 401, so that pressure regulating cavity Blanket gas stream in 401 is discharged by entering Pressure Regulation Exhaust device after gas vent 4125 and air reservoir 4124, also makes Pressure Regulation Exhaust The pressure of the sealing air-flow in pressure regulating cavity 401 is adjusted in device.In this specific embodiment, 90 ° of models in the first mounting disc 412 It is equipped with the air reservoir 4124 in enclosing, the gas vent 4125 of 13 φ 6mm being obliquely installed is evenly equipped in the air reservoir 4124, so as to Air in pressure regulating cavity 401 quickly drains into air reservoir 4124 by gas vent 4125.

Further, Pressure Regulation Exhaust device include the conduit being connected to air reservoir 4124, be connected to conduit it is replaceable It pressure regulation pad, the exhaust pipe being connected to the regulator hole on pressure regulation pad and is connected to exhaust pipe to discharge the air-flow in exhaust pipe Exhaust component.Pressure regulation pad is removable installed in the pressure modulating opening of combustion box.

When work, the air in airflow channel 60 is obturaged by second obturages gap between ring 42 and the second comb ring gear 44 Into pressure regulating cavity 401, the air in pressure regulating cavity 401 divides two-way: all the way by the gas vent 4125 arrival air reservoir 4124, then by Conduit leads to pressure modulating opening, then is discharged into exhaust component through exhaust pipe；One pressure regulation pad is housed on the joint surface of the conduit and pressure modulating opening, Regulator hole is offered on pressure regulation pad, pressure regulation pad is divided into eight different groups according to the aperture of regulator hole, in order to adjust pressure regulating cavity 401 Namely engine obturages the pressure of air, can pad group by replacement pressure regulation to control air and draw flow, and then control pressure regulation The air pressure of chamber 401 keeps the air pressure difference for obturaging 40 front and back of ventilation ring group, reaches and obturage effect；Each group pressure regulation pad It selects, it be depending on obturaging situation；Air reservoir 4124 can store a small amount of air, and it is outside to reduce the compressed air obturaged to the greatest extent Leakage, to reach control 401 pressure of pressure regulating cavity and obturage lubrication.401 air another way of pressure regulating cavity through first obturage ring 41 with Lubricating oil is obturaged in gap between first comb ring gear 43, and worked air forms mist of oil progress turbine wheel shaft after passing through bearing support 20 Chamber 302, the mist of oil in turbine axocoel 302 flow into oil mist separator through conduit, and mist of oil is separated into lubricating oil and sky by oil mist separator Gas, lubricating oil leak into accessory drive gearbox inner cavity, and air is then discharged into Pressure Regulation Exhaust device through conduit and bend pipe.

When actual design, the air in pressure regulating cavity 401 needs to control certain pressure, and pressure is easy greatly very much to have lubricating oil excessively Foam and lubricating oil film is blown down；Pressure is too small, obturage ventilation ring group 40 to obturage effect bad, therefore need to be in sealing circulation Sealing gas circuit in setting control or adjustment pressure pressure regulation part, the present invention in, pressure regulation part, which includes that flow path resistance is biggish, to be obturaged The pressure regulation pad that ventilation ring group 40 and flow path area change.

The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.