CN205669411U

CN205669411U - High-power composite braking decompressor

Info

Publication number: CN205669411U
Application number: CN201620536496.9U
Authority: CN
Inventors: 丁俊; 郝群
Original assignee: Sichuan Tai Bo Fluid Science And Technology Ltd
Current assignee: Sichuan Tai Bo Fluid Science And Technology Ltd
Priority date: 2016-06-02
Filing date: 2016-06-02
Publication date: 2016-11-02
Anticipated expiration: 2026-06-02

Abstract

This utility model relates to a kind of high-power composite braking decompressor, it includes decompressor main shaft, expanding end and blower fan dog point, decompressor main shaft includes main shaft and spindle casing, main shaft two ends are rotationally connected with spindle casing two ends by bearing respectively, and be in transmission connection with expanding end and blower fan dog point respectively, decompressor main shaft is provided with at least one main shaft oil brake, main shaft oil brake includes loop system kinetoplast and brake body inflow pipeline, main shaft is rotationally connected with loop system kinetoplast, in annular stop body, ring wall is provided with the annular stop oil groove connected with brake body inflow pipeline, spindle casing is provided with fuel feeding oil return opening；Compared with prior art, the comprehensive utilization main shaft oil brake of this utility model product and the braking of blower fan dog point, when cryogenic system technological design cannot use booster brake decompressor to need high-power braking effect again, expanding end large load operation demand can be better met, braking power is up to 200kw, and can be adjusted according to expanding end actual motion load.

Description

High-power composite braking decompressor

Technical field

This utility model relates to turbo-expander field, particularly relates to the decompressor of a kind of non pressurized mode of braking.

Background technology

Turbo-expander is to realize a kind of effectively machinery close to adiabatic isentropic expansion process, and gas working medium is in expansion process Obtaining low temperature, the most externally work done, therefore the application for decompressor comprises two effects: obtains low temperature cold and recovers energy (external work)；The coaxial other end of the most any decompressor is required for dog point, and the merit exported by decompressor absorbs simultaneously Control decompressor running speed.

At present, turbo-expander dog point has turbocompressor (supercharging), electromotor, oil brake, blower fan brake etc., General making full use of for energy, all can use turbocompressor to make dog point i.e. booster brake, but, part cryogenic system Do not have suitable process gas supercharging to recover energy during particularity flow scheme design and brake decompressor, now can only use oil brake Or blower fan this energy expenditure type mode of braking of braking.

But, blower fan braking is to be rotarily driven impeller of blower by coaxial expanding end to rotate, and directly from environment, air sucks sky Gas, is directly discharged into air again after being improved by pressure, the valve on regulation export pipeline changes inspiration capacity and pressure at expulsion adjusts Brake load, usual braking power is at below 50kw, even if changing expanding end type size, maximum brake power also can only achieve 100kw；Oil brake is with axis suspension one braked wheel at expanding end, is passed through the lubrication of certain pressure between rotor and stator Oil, is converted to heat by friction by the merit that expanding end exports, lubricating oil take in oil cooler and cool down, regulate fuel feeding oil mass With brake load and the rotating speed that oil pressure can change turbo-expander, although compared with blower fan braking, have that noise is little, volume The features such as little, easy and simple to handle, range of accommodation is wide, but braking power is general also at below 50kw；Visible, either blower fan braking Or oil brake is all limited by braking power, all it is not used to brake high turbine decompressor, it is impossible to meet part low temperature dress The particularity flow scheme design put.

Utility model content

Technical problem to be solved in the utility model is to provide one cannot use supercharging in cryogenic system technological design In the case of mode of braking decompressor needs again high-power braking effect, it is possible to better meet expanding end large load operation demand High-power composite braking decompressor.

The technical scheme that this utility model solves above-mentioned technical problem is as follows:

A kind of high-power composite braking decompressor, it includes decompressor main shaft and is co-axially located at described decompressor main shaft The expanding end at two ends and blower fan dog point, described decompressor main shaft includes main shaft and is centered around the main shaft machine of described main shaft surrounding Shell, the two ends of described main shaft are respectively by the two ends axial rotation of expanding end bearing and dog point bearing and described spindle casing even Connecing, and be in transmission connection with described expanding end and described blower fan dog point respectively, it is main that described decompressor main shaft is provided with at least one Shafting oil brake, described main shaft oil brake includes the loop system being positioned at described spindle casing and being coaxially disposed with described main shaft The inwall of kinetoplast and the brake body inflow pipeline being positioned at outside described spindle casing, described loop system kinetoplast and described spindle casing Fixing connection, described main shaft is connected with described loop system kinetoplast axial rotation, the internal ring wall of described loop system kinetoplast coaxially sets Being equipped with annular stop oil groove, described brake body inflow pipeline is connected through described spindle casing and described loop system kinetoplast are fixing, And in extending to described annular stop body, portion connects with described annular stop oil groove, described spindle casing is additionally provided with and described master The fuel feeding oil return opening of axle casing internal connection.

Compared with prior art, the beneficial effects of the utility model are:

This utility model product sets up main shaft oil brake, and using main shaft as rotor, loop system kinetoplast is as stator, and sets Having brake body inflow pipeline and annular stop oil groove, between rotor and stator, relative motion produces friction, by entering brake body Oil-piping and annular stop oil groove are passed through the brake oil of certain pressure, it is possible to preferably ensure there are enough brake oil flow systems Move and heat radiation, brake oil gap between rotor and stator not only can rely on the viscous force of self brake, and can lead to Cross oil circuit loop and take away the purpose consuming fricative heat thus reach braking, moreover it is possible to ensure that brake oil temperature will not superelevation And damage oil product and part, meanwhile, the other end coaxial with expanding end is blower fan dog point, when expanding end gas expansion promotes main During axle high speed rotating, blower fan dog point can suck air from entrance and be compressed, and consumes the energy of coaxial output, the two associating Braking can better meet the service requirement of high-power expansion unit, so cannot use supercharging system in cryogenic system technological design In the case of flowing mode decompressor needs again high-power braking effect, it is possible to better meet expanding end large load operation demand, Decompressor braking power can reach 200kw, and by the quantity of main shaft oil brake on increase and decrease main shaft, it is also possible to regulation decompressor Braking power, thus meet the actual motion load under the different situations of expanding end, more convenient to use, the scope of application is more Extensively.

On the basis of technique scheme, this utility model can also do following improvement.

As a kind of preferred implementation of the present utility model, described decompressor main shaft is provided with and turns for measuring decompressor The mouth and for measuring the vibration measuring mouth of decompressor vibration state of testing the speed of speed.

Above-mentioned preferred version is used to provide the benefit that: convenient measurement decompressor rotating speed and vibration state.

As another kind of preferred implementation of the present utility model, it is provided with between described expanding end bearing and described expanding end The expanding end axle envelope sealed, is provided with, between described dog point bearing and described blower fan dog point, the braking sealed End axle envelope.

Use above-mentioned preferred version to provide the benefit that: by axle envelope by spindle casing inner chamber respectively with expanding end, braking End separates, it is possible to significantly more efficient avoid Working medium gas from expanding end enter spindle casing inner chamber, it is to avoid air enters from dog point Enter main shaft chassis cavity, it is to avoid the lubricating oil on brake oil or bearing flows into expanding end or dog point from spindle casing inner chamber, from And preferably ensure to expand stability and the reliability of unit operation.

As another kind of preferred implementation of the present utility model, described expanding end includes decompressor spiral case, expands impeller And slider disc can be prevented stuck and the adjustable nozzle of glade plane space between effective elimination slider disc and nozzle vane, described adjustable Nozzle and described expansion impeller are coaxially disposed in described decompressor spiral case from outside to inside relative to described main shaft, described adjustable spray Mouth is fixing with the inwall of described decompressor spiral case to be connected, and described decompressor spiral case is provided with the decompressor for Working medium gas turnover and enters Mouth and expander outlet, described blower fan dog point includes blower fan exhaust volute and is positioned at the blower fan of described blower fan exhaust volute Impeller, described blower fan exhaust volute is provided with the braking blower import for air turnover and braking blower outlet, described main shaft machine The two ends of shell are fixing with described decompressor spiral case and described blower fan exhaust volute respectively to be connected, the two ends of described main shaft respectively with institute State expansion impeller and described draught fan impeller coaxial transmission connects.

Using above-mentioned preferred version to provide the benefit that: structure is compacter, manufacture simpler, input cost is more Low, braking effect is more preferable.

As another kind of preferred implementation of the present utility model, it is additionally provided with and described blower fan in described blower fan exhaust volute The blower fan air-breathing guide cover that impeller is corresponding, described blower fan air-breathing guide cover is tubular, and is coaxially disposed in described draught fan impeller remote Side from described main shaft.

Above-mentioned preferred version is used to provide the benefit that: blower fan dog point sucks air from entrance and is compressed more square Just, in hgher efficiency, the efficiency of the energy consuming coaxial output is the highest, and braking effect is more preferable.

As another kind of preferred implementation of the present utility model, described adjustable nozzle includes changing nozzle passage area Multiple nozzle vanes, location dish in the form of a ring, slider disc in the form of a ring and air deflector cover plate in the form of a ring, described air deflector lid Plate, described slider disc and described location dish are coaxially disposed and are mutually matched, described air deflector cover plate and described location dish position respectively In the both sides of described slider disc, whole described nozzle vanes are respectively positioned between described slider disc and described location dish, and along described Location dish circumferencial direction is uniformly distributed, and each described nozzle vane side fits tightly and is rotationally connected with described location dish, separately Side fits tightly with described slider disc and is slidably connected, and described slider disc is vertically provided with near the side of described air deflector cover plate Described slider disc can be driven to do the trundle of movement in a curve, and described air deflector cover plate is provided with the transmission corresponding with described trundle Chute, described trundle passes from described transmission chute and can slide in described transmission chute；Described air deflector cover plate is close Side and the described slider disc of described slider disc are coaxially arranged with can mutually be fastened and connected near the sides of described air deflector cover plate Cover plate bulge loop and slider disc bulge loop, and described air deflector cover plate is along the circumferential direction additionally provided with many near the side of described slider disc The individual elastic force collision bead being pressed on described slider disc side, the outer shroud edge of described air deflector cover plate be provided with to described slider disc and The cover sidewall that location dish extends, described cover sidewall covers described slider disc and removable with described location dish fixing is connected.

Use above-mentioned preferred version to provide the benefit that: adjustable nozzle structure is compacter, manufacture assembling simpler, throw Entering cost lower, use convenient, the elastic force collision bead inside air deflector cover plate can be pressed on the slider disc side near it, bullet Slider disc can be pressed to nozzle vane by the elastic force of power collision bead, and nozzle vane may proceed to press to location dish so that the two of nozzle vane Side is adjacent to slider disc and location dish due to pressurized, thus eliminates the glade plane space between slider disc and nozzle vane, all the time will Glade plane space is retained between air deflector cover plate and slider disc, so can be achieved with the zero clearance of nozzle flow passage component, the most effectively Reduce nozzle segment internal leakage, promote runner efficiency, be prevented effectively from again occur between slider disc and air deflector cover plate stuck Situation, it is ensured that expand stability and the reliability of unit.

As another kind of preferred implementation of the present utility model, the middle part of each described nozzle vane is equipped with location Hole, it is the most vertically provided with rotational pin away from the one end side of described location dish internal ring, described location dish is along the circumferential direction provided with Multiple alignment pins matched with hole, corresponding described location respectively, described slider disc are along the circumferential direction provided with and multiple can carry respectively Dynamic corresponding described rotational pin does the sliding tray of movement in a curve, one end of each described nozzle vane by corresponding described alignment pin and Hole, location is rotationally connected with described location dish, and the other end is slided even with described slider disc by corresponding described rotational pin and sliding tray Connect.

Above-mentioned preferred version is used to provide the benefit that: the trundle in slider disc can be picked out by pull bar, thus sharp The movement in a curve of slider disc, the alignment pin on the dish of location is realized with the up and down motion of the pneumatic actuators such as pneumatic diaphragm control valve Can only make movement in a curve around it with limits nozzle blade, the rotational pin on such nozzle vane just can be by slider disc Sliding tray drives nozzle vane to rotate, thus realizes the aperture of nozzle passage, the modulability of significantly more efficient guarantee adjustable nozzle Can, it is ensured that expand stability and the reliability of unit.

As another kind of preferred implementation of the present utility model, described cover plate bulge loop and the snapping of described slider disc bulge loop Place is provided with the centring ring that can ensure that described slider disc spin stabilization and will not deflect.

Above-mentioned preferred version is used to provide the benefit that: the interior outer rim of centring ring can effectively and air deflector cover plate and cunning Moving plate matches, it is ensured that slider disc circumferential position in rotary course is constant, it is ensured that slider disc spin stabilization, will not occur partially Turn.

As another kind of preferred implementation of the present utility model, described cover plate bulge loop and the snapping of described slider disc bulge loop Place is provided with sealing ring.

Use above-mentioned preferred version to provide the benefit that: the internal leakage of significantly more efficient minimizing nozzle segment, promote runner Efficiency.

As another kind of preferred implementation of the present utility model, the surface of described nozzle vane is provided with one layer of lubriation material Layer, described slider disc is provided with near the side of described nozzle vane near the side of described nozzle vane and/or described location dish One layer of lubricant layer.

Above-mentioned preferred version is used to provide the benefit that: to increase and contact between slider disc and/or location dish and nozzle vane The lubricity in face and the lubricity of nozzle vane both sides rubbing surface, reduce frictional force, improves slider disc and nozzle vane rotates Time andfrictional conditions, be prevented effectively between nozzle vane and slider disc, nozzle vane and location dish generation plucking, pull and even block Dead phenomenon, it is ensured that the regulation performance of adjustable nozzle, so that it is guaranteed that decompressor organizing, stability, reliability.

Accompanying drawing explanation

Fig. 1 is the axial section structural representation of this utility model product；

Fig. 2 be this utility model product in terms of dog point to side cross-sectional view during expanding end；

Fig. 3 is the axial section structural representation along B-B direction of the decompressor main shaft in Fig. 2；

Fig. 4 is that in this utility model, structural representation is partly cutd open in the front of a kind of scheme of adjustable nozzle；

Fig. 5 be in Fig. 4 product along the side cross-sectional view in A-A direction；

In accompanying drawing, the list of parts representated by each label is as follows:

1, decompressor main shaft, 2, expanding end, 3, blower fan dog point, 4, main shaft, 5, expanding end bearing, 6, dog point bearing, 7, loop system kinetoplast, 8, annular stop oil groove, 9, brake body inflow pipeline, 10, fuel feeding oil return opening, 11, decompressor spiral case, 12, Adjustable nozzle, 13, expand impeller, 14, expanding end axle envelope, 15, expander inlet, 16, expander outlet, 17, dog point axle envelope, 18, draught fan impeller, 19, blower fan air-breathing guide cover, 20, braking blower import, 21, braking blower outlet, 22, air deflector cover plate, 23, slider disc, 24, location dish, 25, nozzle vane, 26, rotational pin, 27, alignment pin, 28, trundle, 29, transmission chute, 30, Elastic force collision bead, 31, sealing ring, 32, centring ring.

Detailed description of the invention

Being described principle of the present utility model and feature below in conjunction with accompanying drawing, example is served only for explaining this practicality Novel, it is not intended to limit scope of the present utility model.

Embodiment

As shown in Figures 1 to 5, a kind of high-power composite braking decompressor, it includes decompressor main shaft 1 and is coaxially disposed At expanding end 2 and the blower fan dog point 3 at described decompressor main shaft 1 two ends, described decompressor main shaft 1 include main shaft 4 and around At the spindle casing of described main shaft 4 surrounding, the two ends of described main shaft 4 are respectively by expanding end bearing 5 and dog point bearing 6 and institute The two ends stating spindle casing are axially rotationally connected, and are in transmission connection with described expanding end 2 and described blower fan dog point 3 respectively, institute State and between expanding end bearing 5 and described expanding end 2, be preferably provided the expanding end axle envelope 14 sealed, described dog point bearing The dog point axle envelope 17 sealed it is preferably provided between 6 and described blower fan dog point 3；

Wherein, described expanding end 2 can include decompressor spiral case 11, expands impeller 13 and slider disc 23 can be prevented stuck And effectively eliminate the adjustable nozzle 12 of glade plane space between slider disc 23 and nozzle vane 25, described adjustable nozzle 12 and described swollen Swollen impeller 13 is coaxially disposed in described decompressor spiral case 11 from outside to inside relative to described main shaft 4, described adjustable nozzle 12 with The inwall of described decompressor spiral case 11 is fixing to be connected, and described decompressor spiral case 11 is provided with the decompressor for Working medium gas turnover and enters Mouth 15 and expander outlet 16, described blower fan dog point 3 can include blower fan exhaust volute and be positioned at described blower fan aerofluxus snail Draught fan impeller 18 in shell, described blower fan exhaust volute is provided with the braking blower import 20 for air turnover and braking blower goes out Mouth 21, the two ends of described spindle casing are fixing with described decompressor spiral case 11 and described blower fan exhaust volute respectively to be connected, described The two ends of main shaft 4 are connected with described expansion impeller 13 and described draught fan impeller 18 coaxial transmission respectively, described blower fan exhaust volute Inside it is preferably provided with the vaneless diffuser corresponding with described draught fan impeller 18 and the blower fan corresponding with described draught fan impeller 18 is inhaled Gas guide cover 19, described blower fan air-breathing guide cover 19 is in tubular, and is coaxially disposed in described draught fan impeller 18 away from described main shaft 4 Side；

Described decompressor main shaft 1 is provided with at least one main shaft oil brake, and described main shaft oil brake includes being positioned at institute The loop system kinetoplast 7 of stating in spindle casing and be coaxially disposed with described main shaft 4 and be positioned at the brake body outside described spindle casing Inflow pipeline 9, described loop system kinetoplast 7 is fixing with the inwall of described spindle casing to be connected, described main shaft 4 and described annular stop Body 7 axial rotation connects, and the internal ring wall of described loop system kinetoplast 7 is coaxially arranged with annular stop oil groove 8, and described brake body enters Oil-piping 9 is connected through described spindle casing is fixing with described loop system kinetoplast 7, and it is internal to extend to described loop system kinetoplast 7 Connect with described annular stop oil groove 8, described spindle casing is additionally provided with the fuel feeding oil return that connect internal with described spindle casing Mouth 10；May be provided for measuring the mouth and for measuring decompressor of testing the speed of decompressor rotating speed on described decompressor main shaft 1 The vibration measuring mouth of vibration state.

During this utility model product startup optimization, Working medium gas enters in decompressor spiral case 11 from expander inlet 15, Again by after adjustable nozzle 12, promoting expansion impeller 13 to rotate, post-expansion gas pressure reduces, and temperature reduces, decompressor go out Mouth 16 enters into the next equipment of process unit；

And before starting, the auxiliary equipment fueller of decompressor has started to carry out expanding end bearing 5 and dog point bearing 6 Fuel feeding, and by brake body inflow pipeline 9, the annular stop oil groove 8 on loop system kinetoplast 7 is carried out fuel feeding, expanding end after startup Bearing 5 and dog point bearing 6 form oil film and hold up main shaft 4, it is ensured that main shaft 4 smooth running, are passed through the oil meeting of annular stop oil groove 8 It is assigned in the gap of loop system kinetoplast 7 and main shaft 4, under relative motion, is produced frictional heat by the viscosity of brake oil consume master The rotation function of axle 4, the deep fat that temperature raises returns fueller through fuel feeding oil return opening 10, by supplying together along with bearing oil Oil cooler cooling on oil device；

Meanwhile, the blower fan dog point 3 of the coaxial other end of decompressor works the most simultaneously, at expanding end 2 gas expansion When promoting main shaft 4 high speed rotating, blower fan can suck air from braking blower import 20 and be compressed, and consumes the energy of coaxial output Amount, enters air after supercharging；

This utility model product both can be adjusted by increasing and decreasing quantity or the volume size of main shaft oil brake on main shaft 4 The braking power of joint decompressor, thus meet the actual motion load under expanding end 2 different situations, use convenient, be suitable for Wider, wherein, when the quantity of main shaft oil brake is three, resultant effect is optimal；When main shaft oil brake is multiple Time, it is also possible to coordinate rotating speed to turn down oil-supply valve and reduce oil brake ability, or close the fuel feeding of wherein part main shaft oil brake Valve, thus reduce brake load, meeting the actual motion load under expanding end 2 different situations, range of accommodation is wide, regulating measure Abundant, flexible.

In this utility model, described adjustable nozzle 12 can include the multiple nozzle vanes that can change nozzle passage area 25, location dish 24 in the form of a ring, slider disc 23 in the form of a ring and air deflector cover plate 22 in the form of a ring, described air deflector cover plate 22, Described slider disc 23 and described location dish 24 are coaxially disposed and are mutually matched, described air deflector cover plate 22 and 24 points of described location dish Be not positioned at the both sides of described slider disc 23, whole described nozzle vanes 25 be respectively positioned on described slider disc 23 and described location dish 24 it Between, and be uniformly distributed along described location dish 24 circumferencial direction, each described nozzle vane 25 side is tight with described location dish 24 Fitting and be rotationally connected, opposite side fits tightly and is slidably connected with described slider disc 23, such as: each described nozzle vane 25 Middle part be equipped with location hole, it is the most vertically provided with rotational pin 26 away from the one end side of described location dish 24 internal ring, described fixed Multiple alignment pin 27 matched respectively along the circumferential direction it is provided with hole, corresponding described location, in described slider disc 23 on the dish 24 of position Along the circumferential direction it is provided with multiple sliding tray that corresponding described rotational pin 26 can be driven respectively to do movement in a curve, each described nozzle leaf One end of sheet 25 is rotationally connected with described location dish 24 by corresponding described alignment pin 27 and hole, location, and the other end is by corresponding institute State rotational pin 26 and sliding tray to be slidably connected with described slider disc 23；

The surface of described nozzle vane 25 is preferably provided one layer of lubricating layer, the polytetrafluoroethyl-ne of such as spray sintering Alkene layer, described slider disc 23 near the side of described nozzle vane 25 and/or described location dish 24 near described nozzle vane 25 Side be preferably provided one layer of lubricant layer, such as dry film lubrication oxidant layer；

Described slider disc 23 is vertically provided with near the side of described air deflector cover plate 22 and described slider disc 23 can be driven to do arc The trundle 28 of line motion, described air deflector cover plate 22 is provided with the transmission chute 29 corresponding with described trundle 28, described biography Untie-sell 28 passes from described transmission chute 29 and can slide in described transmission chute 29；

Described air deflector cover plate 22 near the side of described slider disc 23 and described slider disc 23 near described air deflector lid The side of plate 22 is coaxially arranged with the cover plate bulge loop and slider disc bulge loop that can be mutually fastened and connected, and described air deflector cover plate 22 leans on The side of nearly described slider disc 23 is along the circumferential direction additionally provided with multiple elastic force collision bead 30 being pressed on described slider disc 23 side, The most described air deflector cover plate 22 near the side of described slider disc 23 peripherally disposed multiple respectively with multiple described bullets The mounting groove of power collision bead 30 correspondence, described elastic force collision bead 30 lays respectively in corresponding described mounting groove, and described elastic force touches, and 30 is permissible Including spheroid, the one end open other end close hollow cylinder and be positioned at the spring within described hollow cylinder, described spheroid Being connected with the blind end elasticity of described hollow cylinder by described spring, described spheroid stretches out described away from one end of described spring The opening of hollow cylinder, described cover plate bulge loop is preferably provided sealing ring 31 and can ensure that institute at the snapping of described slider disc bulge loop Stating slider disc 23 spin stabilization and the centring ring 32 that will not deflect, the outer shroud edge of described air deflector cover plate 22 is provided with to institute State the cover sidewall that slider disc 23 and location dish 24 extend, described cover sidewall cover described slider disc 23 and with described location dish 24 removable fixing connections.

This adjustable nozzle 12 compact conformation, manufactures and assembles simple, low cost, easy to use, inside air deflector cover plate 22 Elastic force collision bead 30 can be pressed on the slider disc 23 side near it, and slider disc 23 can be pressed to nozzle leaf by the elastic force of elastic force collision bead 30 Sheet 25, nozzle vane 25 may proceed to press to location dish 24 so that the both sides of nozzle vane 25 are adjacent to slider disc 23 due to pressurized With location dish 24, thus eliminate the glade plane space between slider disc 23 and nozzle vane 25, glade plane space is retained in leads all the time Between stream device cover plate 22 and slider disc 23, so can be achieved with the zero clearance of nozzle flow passage component, the most effectively reducing nozzle segment Internal leakage, promote runner efficiency, be prevented effectively from again between slider disc 23 and air deflector cover plate 22 the stuck situation that occurs；

Meanwhile, the trundle 28 in slider disc 23 can be picked out by pull bar, thus utilizes the gas such as pneumatic diaphragm control valve The up and down motion of dynamic actuator realizes slider disc 23 and does movement in a curve, and the alignment pin 27 on location dish 24 can be with limits nozzle leaf Sheet 25 can only make movement in a curve around it, and the rotational pin 26 on such nozzle vane 25 just can be by the sliding tray in slider disc 23 Drive nozzle vane 25 to rotate, thus realize the aperture of nozzle passage, the regulation performance of adjustable nozzle is effectively ensured, it is ensured that expand The stability of unit and reliability.

It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and And in the case of without departing substantially from spirit or essential attributes of the present utility model, it is possible to realize this practicality in other specific forms new Type.Therefore, no matter from the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, this practicality is new The scope of type is limited by claims rather than described above, it is intended that by the containing of equivalency in claim that fall All changes in justice and scope are included in this utility model, should not be considered as any reference in claim limiting Involved claim.

The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all in this practicality Within novel spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in guarantor of the present utility model Within the scope of protecting.

Claims

1. a high-power composite braking decompressor, it is characterised in that it includes decompressor main shaft (1) and is co-axially located at institute State expanding end (2) and the blower fan dog point (3) at decompressor main shaft (1) two ends, described decompressor main shaft (1) include main shaft (4) with And it being centered around the spindle casing of described main shaft (4) surrounding, the two ends of described main shaft (4) are respectively by expanding end bearing (5) and system Moved end bearing (6) is axially rotationally connected with the two ends of described spindle casing, and respectively with described expanding end (2) and described blower fan system Moved end (3) is in transmission connection, and described decompressor main shaft (1) is provided with at least one main shaft oil brake, described main shaft oil brake Including being positioned at described spindle casing and the loop system kinetoplast (7) being coaxially disposed with described main shaft (4) and being positioned at described main shaft Brake body inflow pipeline (9) outside casing, described loop system kinetoplast (7) is fixing with the inwall of described spindle casing to be connected, described Main shaft (4) is connected with described loop system kinetoplast (7) axial rotation, and the internal ring wall of described loop system kinetoplast (7) is coaxially arranged with Annular stop oil groove (8), described brake body inflow pipeline (9) is fixed through described spindle casing with described loop system kinetoplast (7) Connect, and extend to connect with described annular stop oil groove (8) inside described loop system kinetoplast (7), on described spindle casing also It is provided with the fuel feeding oil return opening (10) that connect internal with described spindle casing；

Described expanding end (2) includes decompressor spiral case (11), expands impeller (13) and slider disc (23) can be prevented stuck and have Effect eliminates the adjustable nozzle (12) of glade plane space, described adjustable nozzle (12) and institute between slider disc (23) and nozzle vane (25) State expansion impeller (13) be coaxially disposed from outside to inside in described decompressor spiral case (11) relative to described main shaft (4), described can Adjusting nozzle (12) to fix with the inwall of described decompressor spiral case (11) to be connected, described decompressor spiral case (11) is provided with for working medium gas Body turnover expander inlet (15) and expander outlet (16), described blower fan dog point (3) include blower fan exhaust volute and Being positioned at the draught fan impeller (18) of described blower fan exhaust volute, described blower fan exhaust volute is provided with the braking wind for air turnover Machine import (20) and braking blower outlet (21), the two ends of described spindle casing respectively with described decompressor spiral case (11) and described Blower fan exhaust volute is fixing to be connected, the two ends of described main shaft (4) respectively with described expansion impeller (13) and described draught fan impeller (18) coaxial transmission connects.

High-power composite braking decompressor the most according to claim 1, it is characterised in that on described decompressor main shaft (1) It is provided with the mouth and for measuring the vibration measuring mouth of decompressor vibration state of testing the speed for measuring decompressor rotating speed.

High-power composite braking decompressor the most according to claim 1, it is characterised in that described expanding end bearing (5) with Expanding end axle envelope (14) sealed, described dog point bearing (6) and described blower fan system it is provided with between described expanding end (2) Dog point axle envelope (17) sealed it is provided with between moved end (3).

High-power composite braking decompressor the most according to claim 1, it is characterised in that in described blower fan exhaust volute also Be provided with blower fan air-breathing guide cover (19) corresponding with described draught fan impeller (18), described blower fan air-breathing guide cover (19) in tubular, And be coaxially disposed in described draught fan impeller (18) away from the side of described main shaft (4).

High-power composite braking decompressor the most according to claim 1, it is characterised in that described adjustable nozzle (12) includes Can change multiple nozzle vanes (25) of nozzle passage area, location dish (24) in the form of a ring, slider disc (23) in the form of a ring and Air deflector cover plate (22) in the form of a ring, described air deflector cover plate (22), described slider disc (23) and described location dish (24) are coaxial Arranging and be mutually matched, described air deflector cover plate (22) and described location dish (24) lay respectively at the two of described slider disc (23) Side, whole described nozzle vanes (25) are respectively positioned between described slider disc (23) and described location dish (24), and along described location Dish (24) circumferencial direction is uniformly distributed, and each described nozzle vane (25) side fits tightly with described location dish (24) and rotates Connecting, opposite side fits tightly with described slider disc (23) and is slidably connected, and described slider disc (23) is near described air deflector lid The side of plate (22) is vertically provided with the trundle (28) that described slider disc (23) can be driven to do movement in a curve, described air deflector cover plate (22) being provided with the transmission chute (29) corresponding with described trundle (28), described trundle (28) is from described transmission chute (29) Pass and can slide in described transmission chute (29)；Described air deflector cover plate (22) near described slider disc (23) side and Described slider disc (23) is coaxially arranged with, near the side of described air deflector cover plate (22), the cover plate bulge loop that can be mutually fastened and connected With slider disc bulge loop, and described air deflector cover plate (22) is along the circumferential direction additionally provided with many near the side of described slider disc (23) The individual elastic force collision bead (30) being pressed on described slider disc (23) side, the outer shroud edge of described air deflector cover plate (22) be provided with to The cover sidewall that described slider disc (23) and location dish (24) extend, described cover sidewall cover described slider disc (23) and with institute State the removable fixing connection of location dish (24).

High-power composite braking decompressor the most according to claim 5, it is characterised in that each described nozzle vane (25) Middle part be equipped with location hole, it is the most vertically provided with rotational pin (26), institute away from the one end side of described location dish (24) internal ring State and on location dish (24), be along the circumferential direction provided with multiple alignment pin (27) matched with hole, corresponding described location respectively, described cunning Multiple sliding tray that corresponding described rotational pin (26) can be driven respectively to do movement in a curve along the circumferential direction it is provided with, often on Moving plate (23) One end of individual described nozzle vane (25) is rotated even with described location dish (24) by corresponding described alignment pin (27) and hole, location Connecing, the other end is slidably connected with described slider disc (23) by corresponding described rotational pin (26) and sliding tray.

High-power composite braking decompressor the most according to claim 5, it is characterised in that described cover plate bulge loop and described cunning The centring ring (32) that can ensure that described slider disc (23) spin stabilization and will not deflect it is provided with at the snapping of Moving plate bulge loop.

High-power composite braking decompressor the most according to claim 5, it is characterised in that described cover plate bulge loop and described cunning Sealing ring (31) it is provided with at the snapping of Moving plate bulge loop.

9. according to the high-power composite braking decompressor according to any one of claim 5-8, it is characterised in that described nozzle leaf The surface of sheet (25) is provided with one layer of lubricating layer, described slider disc (23) near described nozzle vane (25) side and/or Described location dish (24) is provided with one layer of lubricant layer near the side of described nozzle vane (25).