CN205841245U - Centrifugal compressor - Google Patents
Centrifugal compressor Download PDFInfo
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- CN205841245U CN205841245U CN201620622849.7U CN201620622849U CN205841245U CN 205841245 U CN205841245 U CN 205841245U CN 201620622849 U CN201620622849 U CN 201620622849U CN 205841245 U CN205841245 U CN 205841245U
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Abstract
The utility model discloses a kind of centrifugal compressor, including: casing, casing includes air intake casing and spiral case, is provided with air inlet in air intake casing, and spiral case is located on air intake casing；Rotating shaft, rotating shaft is located in casing, and rotating shaft includes the first end and the second end extended towards rightabout, and rotating shaft includes that neighbouring first end is arranged and cross section is formed as non-circular connection shaft part；Sencond stage impeller, sencond stage impeller has the installing hole suitable with being connected shaft part shape, and sencond stage impeller fits over with rotating shaft synchronous axial system on connection shaft part by installing borehole jack, and sencond stage impeller is arranged adjacent to the inlet end of spiral case；And one stage impeller, one stage impeller is fixed on the first end by securing member with rotating shaft synchronous axial system, and one stage impeller arranges adjacent to air inlet, arranges floating seal between one stage impeller and air intake casing and/or between sencond stage impeller and spiral case.According to centrifugal compressor of the present utility model, performance is good, low cost.
Description
Technical field
This utility model relates to compressor apparatus field, especially relates to a kind of centrifugal compressor.
Background technology
Pointing out in correlation technique, in two-stage centrifugal type compressor, two impellers, with same connected mode, are for example, bonded
Connect, frictional connection, the mode such as profile connection are connected in same one end of rotating shaft.But, when two impellers are all in the way of frictional connection
When being connected to same one end of rotating shaft, two impellers are locked by pretightning force, and the frictional force by impeller section transmits moment of torsion, causes and turns
The axial length of axle entirety is longer, and impeller end face compressive stress is big, and critical speed is on the low side；When two impellers all connect in the way of bonded
When same one end of rotating shaft, two impellers are attached with axle by key respectively, and the bonded stress that is easily formed at keyway is concentrated, even
The size meeting place is bigger than normal, and the reliability that impeller is connected with rotating shaft is low, and the probability that impeller and rotating shaft were lost efficacy increases, and impeller and axle
Between dynamic balance bad, assembling time generally impeller and axle need to be done repeatedly whole dynamic balance, cause assembling manufacturing efficiency
Low, and when certain part failure in impeller and axle, need to change whole impeller and shaft assembly, maintainability is poor；When two
When impeller is all connected to same one end of rotating shaft in the way of profile connection, need the impeller installation position of axle is processed as profile curve
Shape, the hole of impeller is also processed as the profile curve shape of pairing, and this type of attachment stress distribution is uniform, but difficulty of processing is relatively
Height, production cost is higher.
Fixed sealing structure it is typically provided with to seal impeller on the impeller of the centrifugal compressor in correlation technique, but
When impeller high speed rotating, it is big that impeller and fixed sealing structural collision cause sealing structural wear, and the most fixed sealing is tied
The processing of structure and matching requirements are high.
Utility model content
This utility model is intended at least to solve one of technical problem present in prior art.To this end, this utility model exists
In proposing a kind of centrifugal compressor, the performance of described centrifugal compressor is good, low cost.
According to centrifugal compressor of the present utility model, including: casing, described casing includes air intake casing and spiral case, described
Being provided with air inlet in air intake casing, described spiral case is located on described air intake casing；Rotating shaft, described rotating shaft is located in described casing,
Described rotating shaft includes the first end and the second end extended towards rightabout, described rotating shaft include neighbouring described first end arrange and
Cross section is formed as non-circular connection shaft part；Sencond stage impeller, described sencond stage impeller has and is connected shaft part shape phase with described
Adaptive installing hole, described sencond stage impeller is fitted on described connection shaft part by described installation borehole jack to synchronize to turn with described rotating shaft
Dynamic, described sencond stage impeller is arranged adjacent to the inlet end of described spiral case；And one stage impeller, described one stage impeller is solid by securing member
Being scheduled on described first end with rotating shaft synchronous axial system, described one stage impeller is arranged adjacent to described air inlet, described one stage impeller
And between described air intake casing and/or between described sencond stage impeller and described spiral case, floating seal is set.
According to centrifugal compressor of the present utility model, owing to one stage impeller uses securing member to be connected in rotating shaft and by tight
Firmware transmission moment of torsion, sencond stage impeller uses non-circular profile to be connected in rotating shaft and by coordinating profile transmission moment of torsion, so that
Centrifugal compressor has that difficulty of processing is low, dismounting efficiency is high, bonding strength is good, rotating shaft entire length is short, critical speed is high
Facilitate advantage more, floating seal be set between one stage impeller and air intake casing and/or between sencond stage impeller and spiral case simultaneously,
So that floating seal is removable between one stage impeller and air intake casing and/or between sencond stage impeller and spiral case, not only can
Reducing the abrasion to floating seal, processing and matching requirements to floating seal are low simultaneously.
In certain embodiments, the work surface of described sencond stage impeller and the work surface of described one stage impeller are all towards described
One end is arranged.
In certain embodiments, described rotating shaft farther includes: shaft shoulder portion, and the maximum diameter of axle in described shaft shoulder portion is more than described
Connect the maximum diameter of axle of shaft part and only support with a side end face of neighbouring described second end of described sencond stage impeller.
In certain embodiments, described stage impeller assembly farther includes: lining, and described lining is set in described rotating shaft
Go up and be only against between described one stage impeller and described sencond stage impeller.
In certain embodiments, a side surface of neighbouring described second end of described one stage impeller has the first installation
Groove, described first end stretches into and coordinates in described first mounting groove.
In certain embodiments, the outer peripheral face of described first end is formed as the face of cylinder, the peripheral wall surfaces of described first mounting groove
Be formed as the face of cylinder suitable with the described outer peripheral face shape of described first end.
In certain embodiments, the side surface away from described second end of described one stage impeller has the second installation
Groove, stage impeller assembly farther includes the pressing plate being assemblied in described second mounting groove, and described securing member is sequentially through described
Coordinate with described rotating shaft after pressing plate and described one stage impeller.
In certain embodiments, described securing member includes what at least three was evenly spaced apart in the circumference of described rotating shaft
Hold-down bolt.
In certain embodiments, the cross section outline of described connection shaft part is by least three sections of circular arcs being sequentially connected from beginning to end
Constitute.
In certain embodiments, described floating seal includes: comb sealing ring, and described comb sealing ring is set in described
On sencond stage impeller, and can axially and radially move, described sencond stage impeller and described spiral case can be sealed by described comb sealing ring；Bullet
Property part, described elastic component is set on described sencond stage impeller, and described elastic component is at described sencond stage impeller and described comb sealing ring
Between be axially movable.
Accompanying drawing explanation
Fig. 1 is the axis projection figure of the stage impeller assembly according to this utility model embodiment；
Fig. 2 is the profile of line A-A along Fig. 1；
Fig. 3 is the profile of line B-B along Fig. 2；
Fig. 4 is according to the sectional view of the centrifugal compressor of some embodiments of this utility model；
Fig. 5 is according to zoomed-in view at the E shown in Fig. 4.
Reference:
Centrifugal compressor 1000；
Stage impeller assembly 100；Rotating shaft 1；Connect shaft part 11；Shaft shoulder portion 12；Lining 13；Sencond stage impeller 2；Installing hole 21；
One stage impeller 3；First mounting groove 31；Second mounting groove 32；Pressing plate 4；Hold-down bolt 5.
Casing 200；Air intake casing 201；Air inlet 2011；Spiral case 202；
Floating seal 300；Comb sealing ring 301；Elastic component 302.
Detailed description of the invention
Of the present utility model embodiment is described below in detail, and the example of described embodiment is shown in the drawings, the most ad initio
Represent same or similar element to same or similar label eventually or there is the element of same or like function.Below by ginseng
It is exemplary for examining the embodiment that accompanying drawing describes, it is intended to be used for explaining this utility model, and it is not intended that to this utility model
Restriction.
Following disclosure provides many different embodiments or example for realizing different structure of the present utility model.For
Simplification disclosure of the present utility model, hereinafter parts and setting to specific examples are described.Certainly, they the most only show
Example, and be not intended to limit this utility model.Additionally, this utility model can in different examples repeat reference numerals
And/or letter.This repetition is for purposes of simplicity and clarity, itself does not indicate discussed various embodiment and/or sets
Relation between putting.Additionally, the various specific technique that provides of this utility model and the example of material, but this area is common
Technical staff is it can be appreciated that the property of can be applicable to of other techniques and/or the use of other materials.
Describe according to this utility model first aspect embodiment centrifugal compressor 1000 below with reference to Fig. 1-Fig. 5.
Centrifugal compressor 1000 according to this utility model embodiment, can include casing 200 and stage impeller assembly
100。
Specifically, casing 200 includes air intake casing 201 and spiral case 202, is provided with air inlet 2011, snail in air intake casing 201
Shell 202 is located on air intake casing 201, and the most as shown in Figure 3 and Figure 4, spiral case 202 is located at the rear side of air intake casing 201.
As depicted in figs. 1 and 2, stage impeller assembly 100 includes: rotating shaft 1, sencond stage impeller 2 and one stage impeller 3.
Rotating shaft 1 is located in casing 200, and rotating shaft 1 includes the first end and the second end extended towards rightabout, such as at figure
In example shown in 2, rotating shaft 1 is horizontally disposed d-axis, and the front end of rotating shaft 1 is the first end, and the rear end of rotating shaft 1 is the second end,
With reference to Fig. 2 and Fig. 3, rotating shaft 1 includes that neighbouring first end is arranged and cross section is formed as non-circular connection shaft part 11, namely
Saying, connecting the front end that shaft part 11 is a section in rotating shaft 1 and neighbouring rotating shaft 1 and arrange, the cross section connecting shaft part 11 is formed as non-
Circle carries out circumference so that set to fit over parts thereon and radially positions, and i.e. prevents set from fitting over parts thereon and occurs with it relative
Circumferentially rotate and relatively radially play.Wherein, " set is joined " refer to two parts that shape of cross section is identical, size is generally equalized
Socket coordinates.
As shown in Figure 2 and Figure 4, sencond stage impeller 2 is arranged adjacent to the inlet end of spiral case 202, sencond stage impeller 2 has and is connected
The installing hole 21 that shaft part 11 shape is suitable, sencond stage impeller 2 is fitted on connection shaft part 11 by installing hole 21 set with same with rotating shaft 1
Step rotates.With reference to Fig. 2 and Fig. 3, installing hole 21 axially penetrates through sencond stage impeller 2, wherein, the shape of installing hole 21 along sencond stage impeller 2
Shape with connect shaft part 11 shape is identical and size is equal or slightly larger than and connects the size of shaft part 11, thus sencond stage impeller 2 and turning
Axle 1 can realize circumferentially positioned by the cooperation of on-circular cross-section and radially location, i.e. sencond stage impeller 2 can synchronize to turn with rotating shaft 1
Dynamic, and there is not relatively radially play with rotating shaft 1.
Such as, the cross section outer contour shape connecting shaft part 11 can be formed as by least three sections of circles being sequentially connected from beginning to end
Arc is constituted.The most in the example depicted in fig. 3, the cross section outer contour shape connecting shaft part 11 is formed as by being sequentially connected from beginning to end
Three sections of circular arcs constitute, and the shape of three sections of circular arcs and identical length etc., thus significantly reduce the processing connecting shaft part 11
Difficulty and the dismounting difficulty with sencond stage impeller 2, and, it is effectively improved and connects shaft part 11 to transmit the stability of moment of torsion reliable
Property so that sencond stage impeller 2 uniform force is more smoothly to rotate, and the contact stress improving sencond stage impeller 2 and rotating shaft 1 is concentrated
Problem, connects, it addition, also improve, the reliability that shaft part 11 is connected with rotating shaft 1, extends the use longevity of stage impeller assembly 100
Life.Certainly, this utility model is not limited to this, and the outer surface connecting shaft part 11 can also be by the four sections of circles being sequentially connected from beginning to end
Arc or more multi-section circular arc are constituted, and the connection in this kind of multi-section circular arc face is referred to as profile and connects.
One stage impeller 3 is arranged adjacent to air inlet 2011, and one stage impeller 3 is positioned at the side of neighbouring first end of sencond stage impeller 2
(the such as front side of one stage impeller 3), i.e. one stage impeller 3 are positioned at the side away from the second end of sencond stage impeller 2, and one stage impeller 3
It is fixed on the first end with rotating shaft 1 synchronous axial system by securing member, say, that one stage impeller 3 is by the fixing peace of securing member
It is contained on the first end, thus securing member can carry out axial limiting to one stage impeller 3 and rotating shaft 1, circumference is spacing and radial direction is the most spacing,
Make the one stage impeller 3 can be with rotating shaft 1 synchronous axial system.
Here it is possible to be understood by, in the gas flow direction of stage impeller assembly 100 compressed gas, one stage impeller 3
It is positioned at sencond stage impeller 2 upstream side, so, when rotating shaft 1 drives one stage impeller 3 and sencond stage impeller 2 synchronous axial system during rotating,
The one stage impeller 3 being positioned at upstream side can carry out one stage of compression to the gas entered from air inlet 2011, the gas after one stage of compression
Body can flow to sencond stage impeller 2 and carry out two-stage compression, thus realizes the Two-stage Compression function of stage impeller assembly 100.
It is provided with floating seal between one stage impeller 3 and air intake casing 201 and/or between sencond stage impeller 2 and spiral case 202
300.Specifically, floating seal 300 may be provided between one stage impeller 3 and air intake casing 201, certain floating seal 300
Can also be located between sencond stage impeller 2 and spiral case 202, or, floating seal 300 includes two, and two floating seals
300 are respectively provided between one stage impeller 3 and air intake casing 201 and between sencond stage impeller 2 and spiral case 202.
It is arranged on the floating seal between one stage impeller 3 and air intake casing 201 and/or between sencond stage impeller 2 and spiral case 202
Part 300 1 aspect can play the effect sealing one stage impeller 3 and air intake casing 201 and/or sencond stage impeller 2 with spiral case 202, separately
On the one hand, when airflow passes one stage impeller 3 and/or sencond stage impeller 2, one stage impeller 3 and/or sencond stage impeller 2 compressed gas produce
Axial force floating seal 300 can be made to move in the axial direction so that floating seal 300 is in quick condition,
Thus reduce in one stage impeller 3 and/or sencond stage impeller 2 high-speed rotation produce vibration and with floating seal 300
Collide to reduce the abrasion to floating seal 300, it is ensured that gas inner leakage rate is constant, reduces floating seal 300 simultaneously
Processing and matching requirements, virtually decrease cost.
Thus, during assembling stage impeller assembly 100, can first sencond stage impeller 2 set be fitted in rotating shaft 1, then
One stage impeller 3 is fixed in rotating shaft 1 by securing member, thus the centrifugal compressor 1000 according to this utility model embodiment can
To have following several respects advantage: the connection stress in (1) rotating shaft 1 is uniform, there is not problem of stress concentration, thus improves one
Level impeller 3, sencond stage impeller 2 and the connection reliability of rotating shaft 1, the inefficacy reducing one stage impeller 3, sencond stage impeller 2 and rotating shaft 1 is general
Rate；(2) one stage impeller 3, sencond stage impeller 2 are simple with the connected mode of rotating shaft 1, installation and removal are convenient, it is to avoid in assembling one
Level impeller 3, sencond stage impeller 2 adjust with repeatedly dynamic balancing during rotating shaft 1, and efficiency of assembling is high, can avoid simultaneously because of one stage impeller 3,
Sencond stage impeller 2 and certain part failure of rotating shaft 1, and the replacing to whole stage impeller assembly 100, maintainability is high；(3) turn
It is less that the entire length of axle 1 can be processed, and improves the critical speed of axle system；(4) processing is only needed to connect the profile of shaft part 11, from
And reduce difficulty of processing and production cost, improve production efficiency；(4) between one stage impeller 3 and air intake casing 201 and/or two
Between level impeller 2 and spiral case 202, floating seal 300 is set, floating seal 300 can be made at one stage impeller 3 and gas inlet shell
May move between body 201 and/or between sencond stage impeller 2 and spiral case 202, this can reduce the abrasion to floating seal 300, simultaneously
Reduce the processing to floating seal 300 and matching requirements.In an embodiment of the present utility model, the work of sencond stage impeller 2
The work surface making face and one stage impeller 3 is all arranged towards the first end.The most in the illustrated example shown in fig. 2, the work of sencond stage impeller 2
Arranging facing to front, one stage impeller 3 is located at the front side of sencond stage impeller 2, and the work surface of one stage impeller 3 also sets towards front
Put.Thus, the gas after one stage impeller 3 one stage of compression can flow into sencond stage impeller 2 with by secondary more smoothly and easily
Compression, thus improve compression efficiency and the service behaviour of stage impeller assembly 100 entirety of gas, and it is easy to centrifugal compressor
The processing of spiral case.
Rotating shaft 1 farther includes shaft shoulder portion 12, and the maximum diameter of axle in shaft shoulder portion 12 is more than connecting the diameter of axle of shaft part 11 and with two
One side end face of neighbouring second end of level impeller 2 is only supported.The most in the illustrated example shown in fig. 2, shaft shoulder portion 12 is a section of rotating shaft 1
And it is connected to connect the rear end of shaft part 11, wherein, the maximum diameter of hole of installing hole 21 and the maximum diameter of axle substantially phase being connected shaft part 11
Deng, and the maximum diameter of hole of installing hole 21 is less than the maximum diameter of axle in shaft shoulder portion 12, so, shaft shoulder portion 12 just cannot penetrate installing hole 21
Interior to keep out on the rear end face of sencond stage impeller 2, to prevent sencond stage impeller 2 from altering to the direction (the most backward) away from one stage impeller 3
Dynamic.
Thus, by arranging shaft shoulder portion 12 in rotating shaft 1, sencond stage impeller 2 the most axially can be positioned, thus
Improve sencond stage impeller 2 and the cooperation reliability being connected shaft part 11, and then the functional reliability of raising sencond stage impeller 2, further, since
Rotating shaft 1 is integrally machined shaft shoulder 12, the difficulty of processing in shaft shoulder portion 12 can be effectively reduced, thus limiting two grades of leaves
Wheel 2 occurs in the problem of play to the direction away from one stage impeller 3, and reduce solution realizes difficulty.
Certainly, this utility model is not limited to this, it is also possible to by other devices, sencond stage impeller 2 is carried out axial limiting, example
As can in rotating shaft 1 the sheathed locating ring etc. for keeping out sencond stage impeller 2, so that sencond stage impeller 2 is axially positioned.
Further, stage impeller assembly 100 can also include that lining 13, lining 13 are set in rotating shaft 1 and are only against
Between one stage impeller 3 and sencond stage impeller 2.The most in the illustrated example shown in fig. 2, lining 13 is set in rotating shaft 1 and is positioned at connection
The front end of shaft part 11, so, when one stage impeller 3 and sencond stage impeller 2 all put in place with rotating shaft 1 assembling and when one stage impeller 3 is by tight
When firmware is fixed in rotating shaft 1, the rear end of lining 13 can be kept out on the front end face of sencond stage impeller 2, and the front end of lining 13 can
To keep out on the rear end face of one stage impeller 3, thus lining 13 is it is prevented that one stage impeller 3 is to the side near one stage impeller 3
To (the most forward) play, and during the one stage impeller 3 installed, bearing one stage impeller 3 can be carried out axial limiting with
Prevent the one stage impeller 3 direction play to sencond stage impeller 2.
Thus, by installing lining 13 in rotating shaft 1, can one stage impeller 3 and sencond stage impeller 2 be carried out the most axial
Spacing, thus improve sencond stage impeller 2 be connected shaft part 11 cooperation reliability, and then improve sencond stage impeller 2 functional reliability,
Further, since assemble lining 13 in rotating shaft 1, assembling and difficulty of processing can be effectively reduced, thus limiting sencond stage impeller 2
In the problem that play occurs near the direction of one stage impeller 3, reduce solution realizes difficulty.
Certainly, this utility model is not limited to this, it is also possible to by other devices, sencond stage impeller 2 is carried out axial limiting, example
As the locating dowel extending back and being only against on sencond stage impeller 2 front end face can be processed on the rear end face of one stage impeller 3, or
The front end face of sencond stage impeller 2 is processed the locating dowel extending forward and being only against on one stage impeller 3 rear end face, with to two grades of leaves
Wheel 2 axially positions.
Further, a side surface of neighbouring second end of one stage impeller 3 having the first mounting groove 31, the first end stretches into
And coordinate in the first mounting groove 31.The most in the illustrated example shown in fig. 2, after the first mounting groove 31 can be by one stage impeller 3
The most recessed formation of end face, wherein, the shape of the first mounting groove 31 can identical with the shape of the first end of rotating shaft 1, size is big
Body is equal, thus one stage impeller 3 can be set on the first end of rotating shaft 1 by the first mounting groove 31.Thus, by the first peace
Coordinating of first end of tankage 31 and rotating shaft 1, radially location can be carried out further with countershaft 1 and one stage impeller 3, thus have
Improve to effect the connection reliability of one stage impeller 3 and rotating shaft 1, and facilitate the installation of securing member.
Preferably, the outer peripheral face of the first end and the peripheral wall surfaces of the first mounting groove 31 are all formed as the face of cylinder, thus, reduce
Rotating shaft 1 and the difficulty of processing of one stage impeller 3, reduce production cost, and reduces the dismounting difficulty of one stage impeller 3 and rotating shaft 1,
Improve the overall efficiency of assembling of stage impeller assembly 100.It addition, according to a variant embodiment of the present utility model, first
Mounting groove 31 may be formed as the shape suitable with the front end outer peripheral face of lining 13, fits on lining 13 with set, thus by
Lining 13 carries out radially spacing and axial limiting to one stage impeller 3.
In an embodiment of the present utility model, the side surface away from the second end of one stage impeller 3 has second
Mounting groove 32, stage impeller assembly 100 farther includes the pressing plate 4 being assemblied in the second mounting groove 32, and securing member sequentially passes
Coordinate with rotating shaft 1 after pressing plate 4 and one stage impeller 3.The most in the illustrated example shown in fig. 2, the second mounting groove 32 can be by one-level leaf
The front end face of wheel 3 is backwardly recessed formation, and the shape of the second mounting groove 32 is identical with the shape of pressing plate 4, size is generally equalized, thus
Pressing plate 4 can be assemblied in the second mounting groove 32, then along the axial of rotating shaft 1, securing member can the most sequentially be passed pressing plate 4 He
One stage impeller 3, to be connected to the first end of rotating shaft 1.Thus, one stage impeller 3 can be fixed securely by securing member by pressing plate 4
In rotating shaft 1, thus improve the reliability that one stage impeller 3 is connected with rotating shaft 1.
Preferably, securing member includes the hold-down bolt 5 that at least three is evenly spaced apart in rotating shaft 1 circumference.Such as exist
In the example of Fig. 1, the first end of rotating shaft 1 could be formed with three screwed holes, three screwed holes are uniform in the circumference of rotating shaft 1
Ground is spaced apart, and each screwed hole all axially extending along rotating shaft 1, and pressing plate 4 is formed shape on three perforation, one stage impeller 3
Cheng Yousan through hole, three through holes and three perforation are all the most right with three screwed hole positions, so, when securing member includes three pressures
During tight bolt 5, the threaded shank of three hold-down bolts 5 can be bored a hole and on one stage impeller 3 through three on pressing plate 4 accordingly
Three through holes, corresponding the most threaded with three screwed holes in rotating shaft 1, thus three hold-down bolts 5 can be by one stage impeller 3
It is clamped securely in rotating shaft 1.
Thus, due to rotating shaft 1 by multiple equally distributed hold-down bolts 5 when one stage impeller 3 transmits moment of torsion, moment of torsion can
With Transmit evenly, thus improve the stressing conditions of one stage impeller 3 so that one stage impeller 3 can more smoothly and reliably turn
Dynamic, and improve the reliability that one stage impeller 3 is connected with rotating shaft 1, extend the service life of stage impeller assembly 100.
Certainly, this utility model is not limited to this, and according to the difference of practical situation, securing member can also include other quantity
Hold-down bolt 5, such as four, five or six.It addition, securing member can also is that other have the structural member of fastening function,
Such as fastener etc..It addition, securing member can also be without running through one stage impeller 3 to be connected to by one stage impeller 3 along the axis of rotating shaft 1
Rotating shaft 1, such as securing member can also radially extending and running through the axle portion of one stage impeller 3 to be connected by one stage impeller 3 along rotating shaft 1
To rotating shaft 1.
In embodiments more of the present utility model, as it is shown in figure 5, floating seal 300 includes: comb sealing ring 301
With elastic component 302.Alternatively, elastic component 302 is elastic ring plate.
Specifically, comb sealing ring 301 is set on sencond stage impeller 2, and can axially and radially move, comb sealing ring
301 can will seal between sencond stage impeller 2 and spiral case 202, and elastic component 302 is set on sencond stage impeller 2 and elastic component 302 is at two grades
It is axially movable between impeller 2 and comb sealing ring 301.
Specifically, when airflow passes sencond stage impeller 2, sencond stage impeller 2 can flow through its gas with compression by high speed rotating,
Can produce axial force when sencond stage impeller 2 rotates makes elastic component 302 produce deformation, thus elastic component 302 transmits axial force to spiral case
The inlet end of 202 is so that comb sealing ring 301 is in floating type state, thus reduces and turn at sencond stage impeller 2 high-speed rotary
Journey produces vibration and with the collision of comb sealing ring 301 to reduce abrasion to comb sealing ring 301, it is ensured that gas inner leakage rate
Constant, reduce the processing to floating seal 300 and matching requirements simultaneously, virtually decrease cost.
Below, with reference to Fig. 1-Fig. 5, the centrifugal compressor according to one specific embodiment of this utility model is briefly described
1000。
Centrifugal compressor 1000 includes casing 200 and stage impeller assembly 100.Casing 200 includes air intake casing 201 and snail
Shell 202, is provided with air inlet 2011 in air intake casing 201, spiral case 202 is located on air intake casing 201.Stage impeller assembly 100 wraps
Including: one stage impeller 3, sencond stage impeller 2, rotating shaft 1, lining 13, pressing plate 4, hold-down bolt 5, rotating shaft 1 is located in casing 200, two grades of leaves
Wheel 2 is arranged adjacent to the inlet end of spiral case 202, and one stage impeller 3 is arranged adjacent to air inlet 2011, wherein, and one stage impeller 3 and two grades of leaves
Wheel 2, towards being positioned at the homonymy of rotating shaft 1 in the same manner, wherein, sencond stage impeller 2 is machined with the installing hole 21 of three-arc profile, and turns
Connection joined by connection shaft part 11 set of the three-arc profile on axle 1, to transmit moment of torsion by three-arc profile, rotating shaft 1 is machined with
Shaft shoulder portion 12, sencond stage impeller 2 is axially positioned by the end face in shaft shoulder portion 12, and lining 13 is arranged in rotating shaft 1, and by two grades
The front end of impeller 2 axially positions, and one stage impeller 3 is designed with the first mounting groove 31, to be arranged on the first end of rotating shaft 1
On, thus forming radially location, one stage impeller 3 axially positions by the front end of lining 13, and pressing plate 4 is arranged on one stage impeller 3
In second mounting groove 32 of front end, pressing plate 4 is drilled with three perforation, one stage impeller 3 is designed with three through holes, rotating shaft 1 sets
There are three bolts hole, after three hold-down bolts 5 pass three perforation on pressing plate 4 and three through holes on one stage impeller 3, screw thread
Three screwed holes being connected in rotating shaft 1, to be pressed on one stage impeller 3 in rotating shaft 1, thus by whole for stage impeller assembly 100
Body compresses.
Here, it should be noted that after twin-stage assembly entirety compression fit puts in place, one stage impeller 3 is by lining 13, two grades
Impeller 2 and the power of only supporting in shaft shoulder portion 12, thus the first end of the diapire of the first mounting groove 31 of one stage impeller 3 and rotating shaft 1
Should have gap between end face, thus improve reliability and the effectiveness of stage impeller assembly 100 assembling, it is to avoid sencond stage impeller
2 problems that axial float occurs.
Being provided with floating seal 300 between sencond stage impeller 2 and spiral case 202, floating seal 300 includes: comb sealing ring
301 and elastic component 302.Specifically, labyrinth seal ring set .301 is located on sencond stage impeller 2, and can axially and radially move, comb
Sencond stage impeller 2 and spiral case 202 can be sealed by sealing ring 301, and elastic component 302 is set on sencond stage impeller 2 and elastic component 302 is two
It is axially movable between level impeller 2 and comb sealing ring 301.
In sum, owing to one stage impeller 3 uses multiple hold-down bolt 5 to connect, hold-down bolt 5 is relied on to transmit moment of torsion, two
Level impeller 2 uses non-circular profile to connect, and relies on the transmission moment of torsion that cooperates of profile, thus not only can reduce difficult processing
Degree, it is also possible to provide preferable bonding strength, the entire length of rotating shaft simultaneously 1 can also be than the rotating shaft using other connected modes
The entire length of 1 is short, thus is effectively improved the critical speed of stage impeller assembly 100.Meanwhile, to floating seal 300
Abrasion little, reduce processing and the matching requirements of floating seal 300.
In description of the present utility model, it is to be understood that term "front", "rear", " axially ", " radially ", " circumferential "
It is based on orientation shown in the drawings or position relationship in the orientation indicated or position relationship, is for only for ease of this practicality of description new
Type and simplification describe rather than indicate or imply that the device of indication or element must have specific orientation, with specific orientation
Structure and operation, therefore it is not intended that to restriction of the present utility model.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In description of the present utility model, " multiple " are meant that two or two
Above, unless otherwise expressly limited specifically.
In this utility model, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " Gu
Fixed " etc. term should be interpreted broadly, for example, it may be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of individual element internal or the interaction relationship of two elements.For the ordinary skill in the art, Ke Yigen
Above-mentioned term concrete meaning in this utility model is understood according to concrete condition.
In this utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score
Can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment of the present utility model or example.In this manual, the schematic table to above-mentioned term
State and be necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature are permissible
One or more embodiment in office or example combine in an appropriate manner.Additionally, in the case of the most conflicting, this area
Technical staff the feature of the different embodiments described in this specification or example and different embodiment or example can be entered
Row combines and combination.
Embodiment the most of the present utility model, it will be understood by those skilled in the art that:
In the case of without departing from principle of the present utility model and objective, these embodiments can be carried out multiple change, revise, replace
And modification, scope of the present utility model is limited by claim and equivalent thereof.
Claims (10)
1. a centrifugal compressor, it is characterised in that including:
Casing, described casing includes air intake casing and spiral case, is provided with air inlet in described air intake casing, and described spiral case is located at described
On air intake casing；
Rotating shaft, described rotating shaft is located in described casing, and described rotating shaft includes the first end and the second end extended towards rightabout,
Described rotating shaft includes that neighbouring described first end is arranged and cross section is formed as non-circular connection shaft part；
Sencond stage impeller, described sencond stage impeller has and is connected the installing hole that shaft part shape is suitable, described sencond stage impeller with described
Being fitted over with described rotating shaft synchronous axial system on described connection shaft part by described installation borehole jack, described sencond stage impeller is adjacent to described snail
The inlet end of shell is arranged；And
One stage impeller, described one stage impeller is fixed on described first end with rotating shaft synchronous axial system by securing member, and described one
Level impeller is arranged adjacent to described air inlet, between described one stage impeller and described air intake casing and/or described sencond stage impeller and institute
State and floating seal is set between spiral case.
Centrifugal compressor the most according to claim 1, it is characterised in that the work surface of described sencond stage impeller and described one-level
The work surface of impeller is all arranged towards described first end.
Centrifugal compressor the most according to claim 1, it is characterised in that described rotating shaft farther includes:
Shaft shoulder portion, the maximum diameter of axle in described shaft shoulder portion more than described connection shaft part the maximum diameter of axle and with the neighbour of described sencond stage impeller
One side end face of the most described second end is only supported.
Centrifugal compressor the most according to claim 1, it is characterised in that farther include:
Lining, described lining is set in described rotating shaft and is only against between described one stage impeller and described sencond stage impeller.
Centrifugal compressor the most according to claim 1, it is characterised in that neighbouring described second end of described one stage impeller
Having the first mounting groove on one side surface, described first end stretches into and coordinates in described first mounting groove.
Centrifugal compressor the most according to claim 5, it is characterised in that the outer peripheral face of described first end is formed as cylinder
Face, the peripheral wall surfaces of described first mounting groove is formed as the face of cylinder suitable with the described outer peripheral face shape of described first end.
Centrifugal compressor the most according to claim 1, it is characterised in that described one stage impeller away from described second end
Having the second mounting groove on one side surface, centrifugal compressor farther includes the pressing plate being assemblied in described second mounting groove, institute
State securing member sequentially to coordinate with described rotating shaft after described pressing plate and described one stage impeller.
Centrifugal compressor the most according to claim 7, it is characterised in that described securing member includes that at least three is at described turn
The hold-down bolt being evenly spaced apart in the circumference of axle.
Centrifugal compressor the most according to claim 1, it is characterised in that the cross section outline of described connection shaft part is by head
At least three sections of circular arcs that tail is sequentially connected are constituted.
Centrifugal compressor the most according to claim 1, it is characterised in that described floating seal includes:
Comb sealing ring, described comb sealing ring is set on described sencond stage impeller, and can axially and radially move, described comb
Described sencond stage impeller and described spiral case can be sealed by sealing ring；
Elastic component, described elastic component is set on described sencond stage impeller, and described elastic component is at described sencond stage impeller and described comb
It is axially movable between sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620622849.7U CN205841245U (en) | 2016-06-22 | 2016-06-22 | Centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620622849.7U CN205841245U (en) | 2016-06-22 | 2016-06-22 | Centrifugal compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205841245U true CN205841245U (en) | 2016-12-28 |
Family
ID=58153820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620622849.7U Active CN205841245U (en) | 2016-06-22 | 2016-06-22 | Centrifugal compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205841245U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108980113A (en) * | 2018-08-06 | 2018-12-11 | 南京磁谷科技有限公司 | A kind of adjustment structure of the air intake duct of centrifugal compressor and impeller concentricity |
-
2016
- 2016-06-22 CN CN201620622849.7U patent/CN205841245U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108980113A (en) * | 2018-08-06 | 2018-12-11 | 南京磁谷科技有限公司 | A kind of adjustment structure of the air intake duct of centrifugal compressor and impeller concentricity |
| CN108980113B (en) * | 2018-08-06 | 2024-03-15 | 南京磁谷科技有限公司 | Structure for adjusting concentricity of air inlet channel and impeller of centrifugal compressor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |