CN106286406B - Rotating machinery structure and its vane diffuser - Google Patents
Rotating machinery structure and its vane diffuser Download PDFInfo
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- CN106286406B CN106286406B CN201610933680.1A CN201610933680A CN106286406B CN 106286406 B CN106286406 B CN 106286406B CN 201610933680 A CN201610933680 A CN 201610933680A CN 106286406 B CN106286406 B CN 106286406B
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- rod
- blade
- vane diffuser
- drive ring
- control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
- F04D29/444—Bladed diffusers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of rotating machinery structure and its vane diffuser, vane diffuser includes drive ring, driving device and multiple blade assemblies.Driving device can drive the forward and reverse rotation of drive ring, and multiple blade assemblies are along the circumferentially disposed of drive ring.Blade assembly includes connecting rod, control-rod, guide rod, circumferential locating part and blade.One end of connecting rod and the outside of drive ring are rotatablely connected, one end of the other end and control-rod is rotatablely connected, the other end of control-rod is fixedly connected with one end of guide rod, and guide rod is mutually perpendicular to control-rod, and circumferential locating part can control guide rod circumferentially fixed and can surround own axis.Vane diffuser provided by the invention can efficiently solve the problem of vane diffuser variable working condition bad adaptability.
Description
Technical field
The present invention relates to rotating machine art field, expands more specifically to a kind of rotating machinery structure and its blade
Depressor.
Background technology
, generally all can be in impeller outlet Position Design diffusion in the rotating machineries such as centrifugal compressor, air blower, air compressor machine
Device structure, the diffuser mainly make the flow slowing down with high flow rate from impeller out, kinetic energy is effectively converted into pressure
Power energy.
Diffuser includes vaneless diffuser and vane diffuser, and wherein vaneless diffuser includes the ring being made of two walls
Shape passage, its is simple in structure, and low cost, performance curve is flat, steady working condition wider range, and in Mach number Ma higher,
Efficiency reduces unobvious, therefore vaneless diffuser is used widely.But the drawback is that because airflow direction angle is basically unchanged, flow road
Journey is longer, and friction loss is big.And under design conditions, its efficiency is less than vane diffuser, especially in airflow direction angle very little
When seem and become apparent from.
Vane diffuser is that a series of blades are loaded onto in the circular passage of above-mentioned vaneless diffuser, has diffusion ability
By force, the advantages that size is small, its runner is short, and flow losses are small, thus efficiency is higher.Under design conditions, its efficiency ratio expands without leaf
Depressor is high by 3~5%.But since the position of blade immobilizes, gas shock loss is larger during variable working condition, and efficiency declines bright
It is aobvious, particularly when the angle of attack is excessive, serious separation is also easy to produce in runner, the generation of surge can be caused.When compressor flowrate subtracts
Hour, often occur flowing severe exacerbation first in vane diffuser, and cause the surge of whole compressor.
In conclusion the problem of how efficiently solving vane diffuser variable working condition bad adaptability, is current this area skill
Art personnel's urgent problem.
The content of the invention
In view of this, first purpose of the invention is to provide a kind of vane diffuser, to efficiently solve blade expansion
The problem of depressor variable working condition bad adaptability, second object of the present invention are to provide a kind of rotation for including above-mentioned vane diffuser
Mechanical structure.
In order to reach above-mentioned first purpose, the present invention provides following technical solution：
A kind of vane diffuser, including drive ring, can drive the forward and reverse rotation of the drive ring driving device and
The multiple blade assemblies circumferentially disposed along the drive ring, the blade assembly include：
Connecting rod, the outside of one end of the connecting rod and the drive ring are rotatablely connected, and both relative rotation axis with
The axis of the drive ring is parallel；
The control-rod that the other end of one end and the connecting rod is rotatablely connected, and both relative rotation axis and the driving
The axis of ring is parallel；
The guide rod that one end is fixedly connected with the other end of the control-rod, and the guide rod is mutually perpendicular to control-rod；
Circumferential locating part, the circumferential direction locating part can control the guide rod circumferentially fixed and can turn around own axes
It is dynamic；
It is fixed on the blade of the other end of the guide rod.
Preferably, in above-mentioned vane diffuser, the driving device includes the defeated of actuator and one end and the actuator
The pitman shaft of outlet rotation connection, the other end of the pitman shaft are rotatablely connected with the drive ring, the output of the actuator
Along linear telescopic, it drives drive ring to rotate by the pitman shaft at end.
Preferably, in above-mentioned vane diffuser, the both ends of the pitman shaft by spherical shaft coupling respectively with the driving
Ring is connected with the output terminal of the actuator.
Preferably, in above-mentioned vane diffuser, drive is additionally provided between the output terminal of the pitman shaft and the actuator
Moving axis, and one end of the drive shaft is fixedly connected with the pitman shaft rotation connection other end with the output terminal of the actuator.
Preferably, in above-mentioned vane diffuser, the actuator is linear stepping motor.
Preferably, in above-mentioned vane diffuser, multiple straight-bars, multiple blade groups are fixed with the outside of the drive ring
Part is connected on multiple straight-bars.
Preferably, in above-mentioned vane diffuser, the both ends of the connecting rod by mounting pin respectively with the straight-bar and control
Bar connects.
Preferably, in above-mentioned vane diffuser, the connecting rod is flat rod, and the end of straight-bar and the end of control-rod are equal
With perforate, the connecting rod two end is inserted into the perforate of the straight-bar and control-rod respectively, and the both ends of the flat rod are arc
Shape.
Preferably, in above-mentioned vane diffuser, the guide rod offers mounting hole with the end that the control-rod is connected, institute
State control-rod and pass through the mounting hole.
Preferably, in above-mentioned vane diffuser, the end of the control-rod through the mounting hole is fixed with nut, described
The positionable wall to offset with the guide rod is additionally provided with control-rod, the guide rod is fixedly clamped by the positionable wall and nut.
Preferably, in above-mentioned vane diffuser, the rotating angle of blade is 0-20 °.
Preferably, in above-mentioned vane diffuser, the rotating angle of blade is 15 °.
Preferably, in above-mentioned vane diffuser, the angle limit part for the rotation angle for limiting the drive ring is further included.
Preferably, in above-mentioned vane diffuser, the circumferential direction locating part is specially bearing, and the guide rod passes through the branch
Seat.
Preferably, in above-mentioned vane diffuser, block is provided with the bearing, and is provided with the drive ring spacing
Block, the limited block can offset spacing to be carried out to the limited block with the block when drive ring rotates.
Preferably, in above-mentioned vane diffuser, the angle between the connecting rod and control-rod is not more than 160 °.
Preferably, in above-mentioned vane diffuser, offer and be provided with kidney slot and the guide rod and institute on the blade
State the kidney-shaped axis of kidney slot cooperation.
Preferably, in above-mentioned vane diffuser, the end of the guide rod through the kidney slot is fixed with nut, described to lead
Bar and blade pass through nut check.
Preferably, in above-mentioned vane diffuser, the kidney slot of the blade is opened in the position of its thickness maximum, the leaf
The chord length of piece is L, and maximum gauge is located at the Inlet Position 0.3L-0.5L away from the blade.
Preferably, in above-mentioned vane diffuser, counterbore is equipped with the maximum gauge of the blade, locks the spiral shell of the blade
Mother is sunk in the counterbore, and the counterbore and the kidney slot are collectively forming stepped hole.
Preferably, in above-mentioned vane diffuser, it is provided with protrusion at the maximum gauge of the blade, and the stepped hole
Minimum range of the hole wall away from the convex outer surface is 1.5-3mm.
A kind of rotating machinery structure, including the vane diffuser as any one of above-mentioned.
Preferably, in above-mentioned rotating machinery structure, the rotating machinery structure is centrifugal compressor, air blower, centrifugal water
Pump or air compressor machine.
Preferably, in above-mentioned rotating machinery structure, the rotating machinery structure is centrifugal compressor, and the drive ring drives
The direction of rotation of blade is consistent with the impeller direction of rotation of the centrifugal compressor.
Vane diffuser provided by the invention includes drive ring, driving device and multiple blade assemblies.Wherein, driving device
The forward and reverse rotation of drive ring can be driven, multiple blade assemblies are along the circumferentially disposed of drive ring.Blade assembly includes connecting rod, control
Bar, guide rod, circumferential locating part and blade processed.Wherein, one end of connecting rod and the outside of drive ring are rotatablely connected, the other end and control
One end rotation connection of bar processed, and the pivot center between connecting rod and drive ring is parallel with the axis of drive ring, connecting rod and control
Pivot center between bar processed is also parallel with the axis of drive ring, i.e., pivot center, connecting rod and control between connecting rod and drive ring
Axis when pivot center and drive ring between bar processed rotate is mutually parallel.The other end of control-rod and one end of guide rod
It is fixedly connected, and guide rod is mutually perpendicular to control-rod, i.e., and guide rod is mutually vertical with control-rod, connecting rod.Circumferential locating part energy
Enough control guide rod circumferentially fixed and own axis can be surrounded, is i.e. guide rod cannot occur circumferentially displaced, be only capable of surrounding itself axis
Line rotates.Blade is fixed on the other end of guide rod, and guide rod can rotate when rotating with movable vane piece, and blade and guide rod coaxially turn
It is dynamic.
During using vane diffuser provided by the invention, when variable working condition, by driving device drive ring can be driven to turn
Dynamic, since the both ends of connecting rod are rotatablely connected with drive ring and control-rod respectively, therefore drive ring drives connecting rod and control-rod to turn together
Dynamic, guide rod is fixedly connected with control-rod, therefore guide rod model- following control bar rotates, and then blade follows guide rod to rotate, and realizes leaf
The rotation of piece, to meet that compressor is in Effec-tive Function all the time under different load by regulation blade rotation angle, after rotation
The angle of blade adapts to the air-flow angle of attack after variable working condition, avoid the angle of attack it is excessive when the asthma of surge phenomenon and whole compressor occurs
Shake.
In order to reach above-mentioned second purpose, present invention also offers a kind of rotating machinery structure, the rotating machinery structure
Including any of the above-described kind of vane diffuser.Since above-mentioned vane diffuser has above-mentioned technique effect, there is the blade diffusion
The rotating machinery structure of device should also have corresponding technique effect.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the left view of vane diffuser provided in an embodiment of the present invention；
Fig. 2 is the right view of vane diffuser provided in an embodiment of the present invention；
Fig. 3 is the assembling schematic diagram of drive ring provided in an embodiment of the present invention and driving device；
Fig. 4 is the structure diagram of blade assembly provided in an embodiment of the present invention；
Fig. 5 is the assembling schematic diagram of drive ring provided in an embodiment of the present invention and blade assembly；
Fig. 6 is the assembling schematic diagram of guide rod provided in an embodiment of the present invention and blade；
Fig. 7 is the rotation schematic diagram of blade provided in an embodiment of the present invention；
Fig. 8 is the structure diagram of blade provided in an embodiment of the present invention；
Fig. 9 is the structure diagram of centrifugal compressor provided in an embodiment of the present invention.
In Fig. 1-9：
1- drive rings, 11- limited blocks, 12- boss；
The spherical shaft coupling of 2- driving devices, 21-, 22- drive shafts, 23- pitman shafts；
3- blade assemblies, 31- straight-bars, 32- connecting rods, 33- control-rods, 34- guide rods, 34a- kidney-shapeds axis, 35- blades；
4- bearings, 41- blocks；
A- compressor box, B- vane diffusers, C- impellers, D- main shafts, E- air-out passages.
Embodiment
First purpose of the present invention is to provide a kind of vane diffuser, to efficiently solve vane diffuser variable working condition
The problem of bad adaptability, second object of the present invention are to provide a kind of rotating machinery structure including above-mentioned vane diffuser.
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
Please refer to Fig.1-Fig. 8, vane diffuser provided in an embodiment of the present invention includes drive ring 1, driving device 2 and multiple
Blade assembly 3.Wherein, driving device 2 can drive 1 forward and reverse rotation of drive ring, and multiple blade assemblies 3 are along drive ring 1
It is circumferentially disposed.Blade assembly 3 includes connecting rod 32, control-rod 33, guide rod 34, circumferential locating part and blade 35.Wherein, connecting rod 32
The outside of one end and drive ring 1 be rotatablely connected, one end of the other end and control-rod 33 is rotatablely connected, and connecting rod 32 and driving
Pivot center between ring 1 is parallel with the axis of drive ring 1, the pivot center between connecting rod 32 and control-rod 33 also with drive ring
1 axis is parallel, i.e., the pivot center between pivot center, connecting rod 32 and control-rod 33 between connecting rod 32 and drive ring 1 with
And the axis during rotation of drive ring 1 is mutually parallel.The other end of control-rod 33 is fixedly connected with one end of guide rod 34, and is led
Bar 34 is mutually perpendicular to control-rod 33, i.e. guide rod 34 and control-rod 33, connecting rod 32 is mutually vertical.Circumferential locating part can control
Guide rod 34 is circumferentially fixed and can surround own axis, i.e. guide rod 34 cannot occur circumferentially displaced, is only capable of surrounding own axes
Rotate.Blade 35 is fixed on the other end of guide rod 34, and guide rod 34 can rotate when rotating with movable vane piece 35, and blade 35 and guide rod
34 rotate coaxially.
Wherein, drive ring 1, connecting rod 32 are collectively forming similar multi-connecting-rod mechanism with control-rod 33, when drive ring 1 turns clockwise
When dynamic, connecting rod 32 drives control-rod 33 to rotate clockwise, while control-rod 33 drives guide rod 34 and blade 35 to rotate clockwise.
When drive ring 1 rotates counterclockwise, connecting rod 32 drive control-rod 33 rotate counterclockwise, while control-rod 33 drive guide rod 34 and
Blade 35 rotates counterclockwise.
During using vane diffuser provided by the invention, when variable working condition, drive ring 1 can be driven by driving device 2
Rotate, since the both ends of connecting rod 32 are rotatablely connected with drive ring 1 and control-rod 33 respectively, therefore drive ring 1 drives connecting rod 32 and control
Bar 33 processed rotates together, and guide rod 34 is fixedly connected with control-rod 33, therefore 34 model- following control bar 33 of guide rod rotates, and then blade 35
Follow guide rod 34 to rotate, realize the rotation of blade 35, to meet that different load pushes by 35 rotation angle of regulation blade
Contracting machine is in Effec-tive Function all the time, and the angle for rotating rear blade 35 adapts to the air-flow angle of attack after variable working condition, and it is excessive to avoid the angle of attack
The surge of Shi Fasheng surge phenomena and whole compressor.
Specifically, driving device 2 includes the output of actuator and pitman shaft 23, wherein one end of pitman shaft 23 and actuator
End rotation connection, the other end and the drive ring 1 of pitman shaft 23 are rotatablely connected, and the output terminal of actuator drives along linear telescopic
Drive ring 1 is driven to rotate by pitman shaft 23 when the output terminal of part is flexible.When adjusting 35 angle of blade, the output terminal of actuator is stretched
Go out or shrink, and then drive pitman shaft 23 to move, in the output terminal telescopic process of actuator between pitman shaft 23 and output terminal
Angle change, i.e., the angle between the flexible straight line where pitman shaft 23 and output terminal changes, due to pitman shaft
23 both ends are rotation connection, therefore pitman shaft 23 can drive drive ring 1 to rotate.Output terminal can be stretched in order to avoid blocking
During contracting along the center of circle of straight line and drive ring 1 be staggered settings, i.e., when output terminal stretches along straight line only drive ring 1 circle
The heart.So set, rectilinear movement is converted to rotation by driving device 2, be easier to realize the rotation of drive ring 1, it is simple in structure just
In operation.
Wherein, the both ends of pitman shaft 23 can by spherical shaft coupling 21 respectively with drive ring 1 and the output terminal of actuator
360 ° of rotations can occur relative to the output terminal of drive ring 1 and actuator for connection, the both ends of such pitman shaft 23 so that connecting rod
One end of axis 23 is stretched translation with the output terminal of actuator, and the other end rotates in a circumferential direction with drive ring 1, so that pitman shaft
The movement at 23 both ends is more flexible.Certainly, the both ends of pitman shaft 23 can also by rotation axis respectively with drive ring 1 and actuator
Output terminal connection, be not limited thereto.
In order to ensure that pitman shaft 23 does not relatively rotate with spherical shaft coupling 21, can 23 both ends of pitman shaft with it is spherical
A locking nut is installed in the position that shaft coupling 21 connects, this locking nut can limiting rod axis 23 and spherical shaft coupling 21 not
Relatively rotate.
For the ease of connection, drive shaft 22 is also provided between pitman shaft 23 and the output terminal of actuator, and drive
One end of moving axis 22 is rotatablely connected the other end with pitman shaft 23 and is fixedly connected with the output terminal of actuator.It is such then pitman shaft 23
One end is connected by spherical shaft coupling 21 with drive shaft 22, and the other end is connected by spherical shaft coupling 21 with drive ring 1.
Preferably, actuator can be linear stepping motor, and the precision of linear stepping motor is higher and cost is low.Certainly,
Actuator can also be cylinder or telescopic oil cylinder, be not limited thereto.
For the ease of the connection of blade assembly 3, multiple straight-bars 31, multiple blades can be fixed with the outside of drive ring 1
Component 3 is connected on multiple straight-bars 31.For multiple straight-bars 31 along the circumferentially disposed of drive ring 1, the length of straight-bar 31 can be with
Set along the radial direction of drive ring 1, one end of such straight-bar 31 is fixedly connected with drive ring 1, and the other end connects with blade assembly 3
Connect.Straight-bar 31 can be connected through a screw thread with drive ring 1, and threaded hole, the end of straight-bar 31 can be specifically offered on drive ring 1
Portion sets external thread section, for the ease of both connections, a die nut screens can also be set on straight-bar 31, so may be used
Straight-bar 31 is rotated after die nut screens to be blocked by spanner.Certainly, between straight-bar 31 and drive ring 1 can also interference match somebody with somebody
Close, be not limited thereto.
In addition, the outside of drive ring 1 can be directly solid with boss 12 circumferentially arranged with multiple boss 12, one end of straight-bar 31
Fixed connection.The positioning of straight-bar 31 is so easily facilitated, multiple straight-bars 31 should be uniformly distributed along the circumferential direction of drive ring 1.
In order to simplify structure, the wherein both ends of connecting rod 32 can be connected with straight-bar 31 and control-rod 33 respectively by mounting pin
Connect.I.e. one end of connecting rod 32 is rotatablely connected by mounting pin and straight-bar 31, and the other end of connecting rod 32 passes through mounting pin and control-rod
33 rotation connections.
Specifically, connecting rod 32 can be flat rod, and the end of straight-bar 31 and the end of control-rod 33 are respectively provided with perforate, connecting rod
Inside the perforate of 32 both ends insertion straight-bar 31 and control-rod 33, then by mounting pin by connecting rod 32 and straight-bar 31 and control-rod
33 rotation connections.In order to avoid interfering the rotational angle of connecting rod 32, the both ends of connecting rod 32 can be disposed as arc, connecting rod 32
Both ends can be outstanding, its end will not offset and turn of limiting rod 32 with the inner wall of perforate when such connecting rod 32 rotates
Dynamic angle.
Certainly, connecting rod 32 can also be round bar, and connecting rod 32 is with straight-bar 31 and control-rod 33 by rotating axis connection.
For the ease of the connection of guide rod 34 and control-rod 33, can be offered in guide rod 34 with the end that control-rod 33 is connected
Mounting hole, control-rod 33 pass through mounting hole.Further, the end of control-rod 33 through mounting hole is fixed with nut, control-rod
The positionable wall to offset with guide rod 34 is additionally provided with 33, guide rod 34 is fixedly clamped by positionable wall and nut.That is the side of guide rod 34
Offset with positionable wall, opposite side offsets with nut, and positionable wall and nut clamp guide rod 34 to realize guide rod 34 and control-rod 33
It is relatively fixed.
Prominent locating piece can be specifically provided with control-rod 33, the side of the close guide rod 34 of locating piece is positioning
Wall.One die nut screens can also be set on control-rod 33, be easy to use spanner card column die nut when so tightening nut
Screens is to fix control-rod 33.Die nut screens can offset as prominent locating piece with guide rod 34.
As shown in fig. 6,35 positional representation of blade shown in solid the location of blade 35, dotted line institute when flow is minimum
The leaf position shown represents the location of blade 35 during maximum flow, and b represents 35 rotation angle of blade, and blade 35 is rotating
Angle b is 0-20 °.Preferably, the rotating angle b of blade 35 is 15 °.Certainly, the rotation angle b of blade 35 can also be more than
20 °, it is not limited thereto.When being installed, the direction of rotation of blade 35 need to be impeller in impeller direction of rotation, Fig. 6
When rotating clockwise, the rotation schematic diagram of blade 35.
In order to avoid the rotation angle of blade 35 is excessive, vane diffuser B can also include the rotation of limitation drive ring 1
The angle limit part of angle.I.e. when drive ring 1 turns to set angle, due to the effect of angle limit part, drive ring 1 cannot
It is further continued for rotating.
Circumferential locating part can be specially bearing 4, and guide rod 34 passes through bearing 4.Through hole is opened up on bearing 4, guide rod 34 is worn
Cross through hole.So set, 4 position of bearing is fixed, it is circumferentially displaced that the hole wall of through hole carries out guide rod 34 spacing its generation of prevention, and
Guide rod 34 can surround own axis in through hole.
Further, block 41 is provided with bearing 4, limited block 11 is provided with drive ring 1, drive ring 1 rotates the time limit
Position block 11 can offset spacing to be carried out to limited block 11 with block 41.Such block 41 and limited block 11 collectively form angle limit
Part, i.e., when drive ring 1 turns to set angle, the limited block 11 on drive ring 1 is offseted with the block 41 on bearing 4 to prevent to drive
Rotating ring 1 is rotated further.Wherein the quantity of block 41 can be two, and limited block 11 is only capable of in two blocks when drive ring 1 rotates
Rotated between 41, two blocks 41 respectively can limit the positive gyration and reverse angle of drive ring 1.If limited block 11
It is known as an angle limit part with two blocks 41 coordinated with it, then vane diffuser B can set multiple angle limits
Part, is preferably set up three angle limit parts, and three angle limit parts are circumferential uniformly distributed along drive ring 1.
Certainly, angle limit part can also be the fastener of the output terminal collapsing length of limitation actuator, specific fastener limitation
The collapsing length of actuator output terminal, and then limit the rotational angle of drive ring 1.
As shown in figure 4, connecting rod 32 is overturned in 1 rotation process of drive ring in order to prevent, between connecting rod 32 and control-rod 33
Angle a should be not more than 160 °, be otherwise easy to cause connecting rod 32 to be overturned due to rigging error in assembling process, finally lead
Cause total failure.
In the vane diffuser B improved in the present embodiment, kidney slot can be offered on blade 35, and on guide rod 34
It is provided with the kidney-shaped axis 34a coordinated with kidney slot.It so ensure that band movable vane piece 35 rotates when guide rod 34 rotates, and both are coaxial
Rotate.Further, the end of guide rod 34 through kidney slot is fixed with nut, guide rod 34 and blade 35 by nut check, i.e.,
Nut check is so that guide rod 34 and blade 35 are relatively fixed.2-6 notch can be carried outside nut, it is preferential to select 2 or 4
A, notch blocks rear rotating nut with the blade 35 that is locked for frock.
Certainly, blade 35 can also be interference fitted with guide rod 34, be not limited thereto.
In order to ensure the intensity of blade 35, the kidney slot of blade 35 is preferably opened in the position of its thickness maximum.Blade 35
Inlet Position be known as leading edge, outlet position is known as the distance between trailing edge, leading edge trailing edge and is known as chord length L, is counted since leading edge
Calculate, 35 thickness maximum position of blade is normally at 0.3L-0.5L, i.e., maximum gauge is located at the Inlet Position away from blade 35
At 0.3L-0.5L.
In order not to produce larger drag effects air-flow by being equipped with counterbore, locking-blade 35 at the maximum gauge of blade 35
Nut sink in counterbore.Also, counterbore and kidney slot are collectively forming stepped hole.
When being not enough to processing shoulder hole at the maximum gauge of blade 35, it can be set at the maximum gauge of blade 35 convex
Rise, minimum range of the hole wall away from convex outer surface of stepped hole is 1.5-3mm.Raised outer surface is preferably cambered surface.Preferably,
Minimum range of the hole wall of stepped hole away from convex outer surface is 2mm, if minimum range of the hole wall of stepped hole away from convex outer surface
Too it is small then process when easy edge damage, too it will cause fluid greatly to produce larger resistance when passing through.
Blade 35 can be airfoil fan.And blade 35 can process shape by way of cutting, milling or casting
Into, it is preferential to select cutting, the mode of milling, it can so ensure 35 surface smoothness of blade, reduce friction loss.Work as fluid flow
When smaller, 35 size shape of blade is smaller, should not use casting method, cast blade 35 be only applicable to fluid flow it is larger when
Blade 35.
Vane diffuser B can be low denseness vane diffuser, i.e. 35 quantity of blade should not be excessive, and otherwise structure is not easy
Arrangement, in general 35 quantity of blade can be 5~15, optimal selection 9~11.
Based on the vane diffuser provided in above-described embodiment, present invention also offers a kind of rotating machinery structure, the rotation
Turning mechanical structure includes any one vane diffuser in above-described embodiment.Since the rotating machinery structure employs above-mentioned implementation
Vane diffuser in example, so the beneficial effect of the rotating machinery structure refer to above-described embodiment.
Specifically, which can be centrifugal compressor, air blower, centrifugal water pump or air compressor machine.When the rotation
When to turn mechanical structure can be centrifugal compressor, it can be specially compound compressor or single-stage compressor.
When rotating machinery structure is centrifugal compressor, direction of rotation of the drive ring 1 with movable vane piece 35 should be pressed with centrifugation
The impeller direction of rotation of contracting machine is consistent.As shown in figure 8, vane diffuser B is located inside compressor box A, the master of compressor
Axis D impellers rotate together, and impeller C is the working element of whole compressor, and vane diffuser B blades are located at the outlet air of impeller
In passage E.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide scope caused.
Claims (24)
1. a kind of vane diffuser, it is characterised in that including drive ring (1), the drive ring (1) forward and reverse rotation can be driven
Driving device (2) and along the circumferentially disposed multiple blade assemblies (3) of the drive ring (1), blade assembly (3) bag
Include：
Connecting rod (32), one end of the connecting rod (32) are rotatablely connected with the outside of the drive ring (1), and both relative rotations
Axis is parallel with the axis of the drive ring (1)；
The control-rod (33) that the other end of one end and the connecting rod (32) is rotatablely connected, and both relative rotation axis with it is described
The axis of drive ring (1) is parallel；
The guide rod (34) that one end is fixedly connected with the other end of the control-rod (33), and the guide rod (34) and control-rod (33)
It is mutually perpendicular to；
Circumferential locating part, the circumferential direction locating part can control the guide rod (34) circumferentially fixed and can turn around own axes
Dynamic, the guide rod (34) can rotate when rotating with movable vane piece (35), and blade (35) and guide rod (34) rotate coaxially；
It is fixed on the blade (35) of the other end of the guide rod (34).
2. vane diffuser according to claim 1, it is characterised in that the driving device (2) includes actuator and one
The pitman shaft (23) that the output terminal of end and the actuator is rotatablely connected, the other end and the drive ring of the pitman shaft (23)
(1) it is rotatablely connected, for the output terminal of the actuator along linear telescopic, it drives drive ring (1) by the pitman shaft (23)
Rotate.
3. vane diffuser according to claim 2, it is characterised in that the both ends of the pitman shaft (23) pass through spherical company
Output terminal of the joint (21) respectively with the drive ring (1) and the actuator is connected.
4. the vane diffuser according to Claims 2 or 3, it is characterised in that the pitman shaft (23) and the actuator
Output terminal between be additionally provided with drive shaft (22), and one end of the drive shaft (22) and pitman shaft (23) rotation connection are another
End is fixedly connected with the output terminal of the actuator.
5. the vane diffuser according to Claims 2 or 3, it is characterised in that the actuator is linear stepping motor.
6. vane diffuser according to claim 1, it is characterised in that be fixed with the outside of the drive ring (1) multiple
Straight-bar (31), multiple blade assemblies (3) are connected on multiple straight-bars (31).
7. vane diffuser according to claim 6, it is characterised in that the both ends of the connecting rod (32) pass through mounting pin point
It is not connected with the straight-bar (31) and control-rod (33).
8. vane diffuser according to claim 7, it is characterised in that the connecting rod (32) is flat rod, and straight-bar
(31) end and the end of control-rod (33) is respectively provided with perforate, connecting rod (32) both ends be inserted into respectively the straight-bar (31) and
In the perforate of control-rod (33), the both ends of the flat rod are arc.
9. vane diffuser according to claim 1, it is characterised in that the guide rod (34) connects with the control-rod (33)
The end connect offers mounting hole, and the control-rod (33) passes through the mounting hole.
10. vane diffuser according to claim 9, it is characterised in that the control-rod (33) passes through the mounting hole
End be fixed with nut, be additionally provided with the positionable wall to offset with the guide rod (34), the guide rod on the control-rod (33)
(34) it is fixedly clamped by the positionable wall and nut.
11. vane diffuser according to claim 1, it is characterised in that the rotating angle of the blade (35) is 0-
20°。
12. vane diffuser according to claim 11, it is characterised in that the rotating angle of the blade (35) is 15 °.
13. vane diffuser according to claim 1, it is characterised in that further include the rotation for limiting the drive ring (1)
The angle limit part of angle.
14. vane diffuser according to claim 1, it is characterised in that the circumferential direction locating part is specially bearing (4),
And the guide rod (34) passes through the bearing (4).
15. vane diffuser according to claim 14, it is characterised in that block (41) is provided with the bearing (4),
And limited block (11) is provided with the drive ring (1), the limited block (11) can be with the gear when drive ring (1) rotates
Block (41) offsets spacing to be carried out to the limited block (11).
16. vane diffuser according to claim 1, it is characterised in that between the connecting rod (32) and control-rod (33)
Angle be not more than 160 °.
17. vane diffuser according to claim 1, it is characterised in that kidney slot and described is offered on the blade
The kidney-shaped axis (34a) coordinated with the kidney slot is provided with guide rod (34).
18. vane diffuser according to claim 17, it is characterised in that the guide rod (34) passes through the kidney slot
End is fixed with nut, and the guide rod (34) and blade (35) pass through nut check.
19. vane diffuser according to claim 17, it is characterised in that the kidney slot of the blade (35) is opened in it
The position of thickness maximum, the chord length of the blade (35) is L, and maximum gauge is located at the Inlet Position away from the blade (35)
At 0.3L-0.5L.
20. vane diffuser according to claim 19, it is characterised in that be equipped with the maximum gauge of the blade (35)
Counterbore, the nut for locking the blade (35) are sunk in the counterbore, and the counterbore and the kidney slot are collectively forming stepped hole.
21. vane diffuser according to claim 20, it is characterised in that set at the maximum gauge of the blade (35)
There is protrusion, and minimum range of the hole wall of the stepped hole away from the convex outer surface is 1.5-3mm.
22. a kind of rotating machinery structure, it is characterised in that including the blade diffusion as any one of claim 1-20
Device.
23. rotating machinery structure according to claim 22, it is characterised in that the rotating machinery structure is centrifugal compressed
Machine, air blower, centrifugal water pump or air compressor machine.
24. rotating machinery structure according to claim 22, it is characterised in that the rotating machinery structure is centrifugal compressed
Machine, the direction of rotation of the drive ring (1) with movable vane piece (35) are consistent with the impeller direction of rotation of the centrifugal compressor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610933680.1A CN106286406B (en) | 2016-10-25 | 2016-10-25 | Rotating machinery structure and its vane diffuser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610933680.1A CN106286406B (en) | 2016-10-25 | 2016-10-25 | Rotating machinery structure and its vane diffuser |
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| CN106286406B true CN106286406B (en) | 2018-04-20 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106704265B (en) * | 2016-11-11 | 2023-04-14 | 珠海格力电器股份有限公司 | Diffuser, diffuser mounting structure, mechanical device and refrigeration equipment |
| CN107165654A (en) * | 2017-06-16 | 2017-09-15 | 天津大学 | Shield tunnel straightway liner structure rigidity gear driven type strengthens method |
| CN107143350A (en) * | 2017-06-16 | 2017-09-08 | 天津大学 | Shield tunnel straightway liner structure rigidity gear driven type stiffening device |
| CN107201907A (en) * | 2017-06-16 | 2017-09-26 | 天津大学 | Shield tunnel straightway pipe ring rigidity of structure Worm-gear type strengthens method |
| CN107227963A (en) * | 2017-06-16 | 2017-10-03 | 天津大学 | Shield tunnel straightway pipe ring rigidity of structure Worm-gear type stiffening device |
| CN110566514A (en) * | 2019-10-25 | 2019-12-13 | 重庆通用工业(集团)有限责任公司 | Noise reduction blade structure of centrifugal compressor |
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| CN106286406A (en) | 2017-01-04 |
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