CN108138793A - Centrifugal compressor - Google Patents
Centrifugal compressor Download PDFInfo
- Publication number
- CN108138793A CN108138793A CN201680060774.0A CN201680060774A CN108138793A CN 108138793 A CN108138793 A CN 108138793A CN 201680060774 A CN201680060774 A CN 201680060774A CN 108138793 A CN108138793 A CN 108138793A
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- China
- Prior art keywords
- face
- rotary shaft
- rotor
- thrust
- axis direction
- Prior art date
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Classifications
-
- 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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/051—Axial thrust balancing
- F04D29/0513—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
- F04D17/12—Multi-stage pumps
- F04D17/122—Multi-stage pumps the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors
- F04D17/125—Multi-stage pumps the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors the casing being vertically split
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
-
- 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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/057—Bearings hydrostatic; hydrodynamic
-
- 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
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of centrifugal compressor, has：Rotary shaft, have rotor electro-motor, for rotary shaft insert tubular axle sleeve and radial bearing.Rotor has the rotor end-face of the end face of the axis direction for rotary shaft.Axle sleeve has the end face of shaft bush of the end face of the axis direction for rotary shaft.Rotor end-face and end face of shaft bush are relative to each other on the axis direction of rotary shaft.Between rotor end-face and end face of shaft bush, equipped with the thrust bearing of thrust born because being generated during the rotation of impeller.
Description
Technical field
The present invention relates to centrifugal compressors.
Background technology
Centrifugal compressor has for example：Rotary shaft；Electro-motor rotates rotary shaft；Impeller, along with rotary shaft
Rotation and rotate, thus fluid is compressed；And housing, storage rotary shaft, electro-motor and impeller.It see, for example
Patent document 1.In addition, in patent document 1, describing centrifugal compressor has：The conduct thrust rotated integrally with rotary shaft
It pads the flange part of (liner) and clamps 2 thrust bearings of the flange part.
Existing technical literature
Patent document
Patent document 1:Special open 2009-257165 bulletins
Invention content
Technical problems to be solved by the inivention
Here, when rotary shaft rotates, thrust liner rotation generates windage loss so being padded in thrust.Accordingly, it is possible to
The efficiency of centrifugal compressor is caused to decline.
The purpose of the present invention is to provide a kind of centrifugal compressors of the raising it is possible to realize efficiency.
For solving the technical solution of technical problem
The centrifugal compressor for reaching above-mentioned purpose has：Rotary shaft；Electro-motor has and is installed on the rotary shaft
Rotor rotates the rotary shaft；Impeller rotates along with the rotation of the rotary shaft, thus fluid is compressed；
Housing stores the rotary shaft, the electro-motor and the impeller；The axle sleeve (boss) of tubular is set to described
In housing, inserted for the rotary shaft；And radial bearing, it is set between the axle sleeve and the rotary shaft, by the rotation
Rotating shaft support, which obtains, to be rotated.The rotor has rotor end-face, and the rotor end-face is the axis direction of the rotary shaft
End face.The axle sleeve has end face of shaft bush, and the end face of shaft bush is the end face of the axis direction of the rotary shaft.The rotor-end
Face and the end face of shaft bush are relative to each other on the axis direction of the rotary shaft.The centrifugal compressor is in the rotor-end
Between face and the end face of shaft bush, has the thrust bearing of thrust for bearing to be generated due to the rotation of the impeller.
Description of the drawings
Fig. 1 is the sectional view for the summary for representing centrifugal compressor and Vehicular air-conditioning apparatus.
Fig. 2 is the sectional view that amplification represents rotor and thrust bearing.
Fig. 3 is the sectional view of the summary for the Vehicular air-conditioning apparatus for representing other examples.
Specific embodiment
Hereinafter, one embodiment of centrifugal compressor is illustrated using attached drawing.In the present embodiment, centrifugation pressure
Contracting machine is equipped on vehicle.In addition, in Fig. 1~Fig. 3, in order to illustrate conveniently, for rotary shaft 12, represented by side view.Separately
Outside, in order to illustrate conveniently, for electromagnetic steel plate 51, grip block 52,53, spacer (spacer) 55,56 and thrust bearing 91,
92 thickness is allowed to different from practical size and represents.
As shown in Figure 1, centrifugal compressor 10 has the housing 11 for forming its outer profile.Housing 11 is for example round as a whole
Tubular.Housing 11 is made of the material that metal etc. has thermal conductivity.
Centrifugal compressor 10 has rotary shaft 12, makes the electro-motor 13 of the rotation of rotary shaft 12 and be installed on rotary shaft 12
The the 1st and the 2nd impeller 14,15, be used as the component for being accommodated in housing 11.Rotary shaft 12 has：Main part 12a and front end
The diameter of 12b, front end 12b reduce than main part 12a and are mounted with the 1st and the 2nd impeller 14,15.
Housing 11 have divide the 1st and the 2nd blade wheel chamber A1, A2 procapsid 20, the 1st and the 2nd blade wheel chamber A1,
A2 stores the 1st and the 2nd impeller 14,15.Procapsid 20 is made of 3 parts 21~23, and each section 21~23 is to pass through the 1st
Points 21 and the state of part 2 22 from the axis direction Z clampings middle section 23 of rotary shaft 12 be unitized.
Part 1 21 is substantially tubular, has the 1st compressor perforation penetrated through on the axis direction Z of rotary shaft 12
Hole 21a.Part 1 21 have on the axis direction Z of rotary shaft 12 mutually positioned at opposite side the 1st and the 2nd end face 21b,
21c.1st compressor through hole 21a is opened on the 1st and the 2nd end face 21b, 21c of part 1 21.1st end of part 1 21
Face 21b is abutted with middle section 23.1st compressor through hole 21a has diameter from the opening of the 1st end face 21b to rotary shaft 12
Axis direction Z way in position the diminishing frustum of a cone (round platform) shape.1st compressor through hole 21a is from the way
The opening of position to the 2nd end face 21c are the cylindric of same diameter.
Part 2 22 is using the axis direction Z of rotary shaft 12 as the substantially tubular of axis direction.Part 2 22 has
It is located at the 1st and the 2nd end face 22a, 22b of opposite side mutually on the axis direction Z of rotary shaft 12.1st end of part 2 22
Face 22a is abutted with middle section 23.Recess portion 22c is formed in the 2nd end face 22b.Moreover, in the bottom surface of recess portion 22c, it is formed with
The 2nd compressor through hole 22d penetrated through on the axis direction Z of rotary shaft 12.2nd compressor through hole 22d is formed as diameter
From the opening opposite with middle section 23 to the diminishing truncated cone shape in position in the way of the axis direction Z of rotary shaft 12,
The opening of position to the above-mentioned open opposite sides with middle section 23 is the cylindric of same diameter from the way.
Middle section 23 is using the axis direction Z of rotary shaft 12 as the substantially disk-shaped of plate thickness direction.Middle section 23
Have：With the 1st end face 21b of part 1 21 the 1st middle section end face 23a abutted and with the 1st middle section end face 23a phases
The end face tossed about, the 2nd middle section end face 23b abutted with the 1st end face 22a of part 2 22.It is passed through by the 1st compressor
The inner surface of through-hole 21a and the 1st middle section end face 23a mark off the 1st blade wheel chamber A1, pass through the 2nd compressor through hole 22d's
Inner surface and the 2nd middle section end face 23b mark off the 2nd blade wheel chamber A2.That is, middle section 23 is to the 1st blade wheel chamber A1 and the 2nd leaf
Engineer room A2 is separated.
In middle section 23, being formed with insert has the middle section through hole 23c of rotary shaft 12.The front end of rotary shaft 12
12b is configured with having penetrated through the state of middle section through hole 23c, is configured to across two blade wheel chamber A1, A2.Moreover, the 1st leaf
Wheel 14 is installed on the part being configured in the 1st blade wheel chamber A1 in the front end 12b of rotary shaft 12, and the 2nd impeller 15 is installed on rotation
The part being configured in the 2nd blade wheel chamber A2 in the front end 12b of shaft 12.
1st impeller 14 is diameter from its cardinal extremity face 14a diminishing substantially truncated cone shapes of end face 14b forward, with edge
The mode for the inner surface of the 1st compressor through hole 21a is configured in the 1st blade wheel chamber A1.Equally, the 2nd impeller 15 for diameter from
Its cardinal extremity face 15a diminishing substantially truncated cone shapes of end face 15b forward, with along the interior table of the 2nd compressor through hole 22d
The mode in face is configured in the 2nd blade wheel chamber A2.Cardinal extremity face 14a, 15a of two impellers 14,15 are relative to each other.
Procapsid 20 (being in detail part 1 21), it is formed with the 1st suction inlet 30 of sucking fluid.1st suction inlet
30 are opened on the 2nd end face 21c of the 1st compressor through hole 21a.That is, the 1st compressor through hole 21a form the 1st suction inlet 30 with
And the 1st blade wheel chamber A1.The fluid sucked from the 1st suction inlet 30 is flowed into the 1st blade wheel chamber A1.
As shown in Figure 1, in procapsid 20, division has：1st divergent flow path 31 is configured at rotation relative to the 1st blade wheel chamber A1
The radial outside of shaft 12；With the 1st discharge room 32, connected via the 1st divergent flow path 31 with the 1st blade wheel chamber A1.1st diffusion flow
Road 31 is the annular shape for surrounding the 1st impeller 14.1st discharge room 32 is arranged to lean on the radial direction of rotary shaft 12 than the 1st divergent flow path 31
Outside is connected with the 1st outlet 33 for being formed in procapsid 20.
Equally, in procapsid 20, division has：2nd divergent flow path 34 is configured at rotary shaft relative to the 2nd blade wheel chamber A2
12 radial outside；With the 2nd discharge room 35, connected via the 2nd divergent flow path 34 with the 2nd blade wheel chamber A2.2nd discharge room 35
Fluid is discharged from the 2nd outlet 36 for being formed in procapsid 20.
As shown in Figure 1, housing 11 has：Mark off motor shell 41 and the end of the motor chamber A3 of storage electro-motor 13
Plate 42.
Motor shell 41 is for example with bottom 41a and in the bottomed tube of side opening opposite with bottom 41a.Motor shell
41 axis direction is consistent with the axis direction Z of rotary shaft 12.End plate 42 is the circle with the outer diameter same diameter of motor shell 41
Plate, the plate thickness direction of end plate 42 are consistent with the axis direction Z of rotary shaft 12.Motor shell 41 is with end plate 42 so that motor shell
41 openend butts up against the state assembling of the 1st plate face 42a of end plate 42.The opening of motor shell 41 is blocked by end plate 42.Horse
It is divided up to room A3 by motor shell 41 and end plate 42.
In the bottom 41a of motor shell 41, it is formed with insert rotary shaft 12 and for making motor chamber A3 and the 2nd blade wheel chamber
The bottom intercommunicating pore 41b of A2 connections.Bottom intercommunicating pore 41b is formed as：Slave rotary shaft 12 in the bottom 41a of motor shell 41
Axis direction Z observe the part Chong Die with main part 12a and this both sides of surrounding part, from the axis side of rotary shaft 12
It is observed to Z Chong Die with the recess portion 22c of part 2 22.Motor chamber A3 and the 2nd blade wheel chamber A2 are via bottom intercommunicating pore 41b and the 2nd
The recess portion 22c connections of part 22.In addition, bottom intercommunicating pore 41b is not formed as the complete cycle throughout rotary shaft 12, but to revolve
In the circumferential direction of shaft 12 multiple state settings is alternatively arranged across scheduled.
As shown in Fig. 2, electro-motor 13, which has, is installed on rotary shaft 12 (the main part 12a for rotary shaft 12 in detail)
Rotor 50.Rotor 50 is as a whole (to be in detail circle using the axis direction Z of rotary shaft 12 as the tubular of axis direction
Tubular).Rotor 50 have on the axis direction Z of rotary shaft 12 mutually positioned at opposite side the 1st and the 2nd rotor end-face 50a,
50b.Rotor 50 has：The multiple electromagnetic steel plates 51 and the axis from rotary shaft 12 being laminated on the axis direction Z of rotary shaft 12
Direction Z clamps the 1st grip block and the 2nd grip block 52,53 of multiple electromagnetic steel plates 51.1st grip block and the 2nd grip block
52nd, 53 in pairs.In the present embodiment, 51 and the 1st grip block of electromagnetic steel plate and the 2nd grip block 52,53 are same shape, in detail
It carefully says from the axis direction Z of rotary shaft 12 and is viewed as annular shape.In addition, it for convenience of explanation, in the following description, will revolve
It is known as inside close to 51 side of electromagnetic steel plate on the axis direction Z of shaft 12, it is referred to as outer that side will be left from electromagnetic steel plate 51
Side.
Rotor 50 has as the connection structure for linking multiple 51 and the 1st grip blocks of electromagnetic steel plate and the 2nd grip block 52,53
The rivet 54 of part.Rivet 54 has：It is inserted through the trunk of multiple 51 and the 1st grip blocks of electromagnetic steel plate and the 2nd grip block 52,53
Portion 54a and be set to trunk 54a axis direction Z both ends the 1st head 54b and the 2nd head 54c.In addition, the 1st
And the 2nd head 54b, 54c a side be riveting process before it is preformed, the opposing party be by rivet processing make trunk
The front end be collapsed of 54a and formed.
Multiple 51 and the 1st grip blocks of electromagnetic steel plate and the 2nd grip block 52,53 by by the 1st and the 2nd head 54b,
54c is sandwiched and into joining line.In detail, it in multiple 51 and the 1st grip blocks of electromagnetic steel plate and the 2nd grip block 52,53, is formed
There are axis direction Z coconnected through hole 51a, 52a, 53a in rotary shaft 12.These through holes 51a, 52a, 53a are identical
Shape connects mutually on the axis direction Z of rotary shaft 12.Trunk 54a is inserted through each through hole 51a, 52a, 53a.In addition,
The diameter of 1st and the 2nd head 54b, 54c is bigger than each through hole 51a, 52a, 53a.1st and the 2nd head 54b, 54c is snapped into
Clamping lateral surface 52c, 53c with clamping medial surface 52b, 53b opposite side of grip block 52,53, the clamping medial surface 52b,
53b is abutted with electromagnetic steel plate 51.As a result, by multiple 51 and the 1st grip blocks of electromagnetic steel plate and the 2nd grip block 52,53 blocking.
Moreover, the 1st grip block and the 2nd grip block 52,53 are fixed on rotary shaft 12 in a manner of being rotated integrally with rotary shaft 12.Cause
This, along with the rotation of rotary shaft 12, multiple 51 and the 1st grip blocks of electromagnetic steel plate and the 2nd grip block 52,53 rotate integrally.
In this case, the 1st and the 2nd head 54b, 54c is protruded from the 1st and the 2nd clamping lateral surface 52c, 53c.
In addition, as shown in Figure 1, in the present embodiment, rivet 54 has been separately installed more in the circumferential direction of rotary shaft 12
It is a.1st clamping lateral surface 52c corresponds to " plate face of the 1st grip block ", and the 2nd clamping lateral surface 53c corresponds to " the 2nd grip block
Plate face ".
As shown in Fig. 2, rotor 50 has the axis for setting to lean on rotary shaft 12 than the 1st grip block and the 2nd grip block 52,53
1st and the 2nd spacer 55,56 in the outside of line direction Z.1st and the 2nd spacer 55,56 is for example by rotary shaft 12
Axis direction Z is disk-shaped as plate thickness direction, diameter and electromagnetic steel plate 51 and the 1st folder of the 1st and the 2nd spacer 55,56
It holds plate and the 2nd grip block 52,53 is identical.The plate thickness of 1st and the 2nd spacer 55,56 forms to obtain the 1st and the 2nd head of ratio
54b, 54c are thick.
1st spacer 55 has the 1st bearing surface 55a abutted with the 1st clamping lateral surface 52c, the configuration of the 1st spacer 55
In forming the 1st rotor end-face 50a with the faces of the 1st bearing surface 55a opposite sides.
2nd spacer 56 has the 2nd bearing surface 56a abutted with the 2nd clamping lateral surface 53c, the configuration of the 2nd spacer 56
In forming the 2nd rotor end-face 50b with the faces of the 2nd bearing surface 56a opposite sides.
1st and the 2nd spacer 55,56 have as store the 1st and the 2nd head 54b, 54c incorporating section the 1st with
And second recesses 55b, 56b.1st recess portion 55b corresponds to the 1st incorporating section, and second recesses 56b corresponds to the 2nd incorporating section.1st and
Outside recess of second recesses 55b, 56b from the 1st and the 2nd bearing surface 55a, 56a to axis direction Z.1st and second recesses
The depth dimensions of 55b, 56b are set in the range shorter than the plate thickness of the 1st and the 2nd spacer 55,56 than the 1st and the 2nd
The thickness of head 54b, 54c are big.Therefore, the 1st and the 2nd rotor end-face 50a, 50b is without being formed and the 1st and second recesses
The flat surface of the corresponding recess of 55b, 56b.
1st and the 2nd spacer 55,56, to be accommodated with the 1st and the 2nd head in the 1st and second recesses 55b, 56b
The state that 54b, 54c and the 1st and the 2nd bearing surface 55a, 56a are abutted with the 1st and the 2nd clamping lateral surface 52c, 53c, it is fixed
In the 1st grip block and the 2nd grip block 52,53.In addition, the 1st grip block and the 2nd grip block 52,53 and are between 1 and the 2nd
Spacing body 55,56 can also by be bonded, engage etc. it is arbitrary in the form of fix.
Herein, the 1st rotor end-face 50a is configured (more detailed than the plate face of electromagnetic steel plate 51 and the plate face of the 1st grip block 52
Carefully say as the 1st clamping lateral surface 52c) it is flat, the 2nd rotor end-face 50b is configured to be pressed from both sides than the plate face of electromagnetic steel plate 51 and the 2nd
The plate face (being in detail the 2nd clamping lateral surface 53c) for holding plate 53 is flat.In other words, the 1st and the 2nd rotor end-face 50a,
The surface roughness (such as arithmetic average roughness) of 50b is lower than the 1st and the 2nd clamping lateral surface 52c, 53c's.
The manufacturing method of the rotor 50 of present embodiment is simply illustrated.The manufacturing method of rotor 50 includes：To be more
The lamination process that a 51 and the 1st grip block of electromagnetic steel plate and the 2nd grip block 52,53 are laminated；With by the trunk 54a of rivet 54
It is inserted through the insert process of the laminated body.Rivet 54 in the insert process is only at the both ends of the axis direction Z of trunk 54a
In a side end be equipped with head.
Moreover, the manufacturing method of rotor 50 includes：(in detail, it is by the front end of trunk 54a for making rivet 54
The end with head opposite side in the both ends of the axis direction Z of trunk 54a) be collapsed and the riveting that links above-mentioned laminated body
Connect manufacturing procedure.By the riveting manufacturing procedure, head is formed in the front end of trunk 54a, is become trunk 54a's
The both ends of axis direction Z are formed with the 1st and the 2nd head 54b, 54c.
Then, the manufacturing method of rotor 50 includes：By the 1st and the 2nd spacer 55,56 be installed on the 1st grip block and
2nd grip block 52,53 and fixed process.In this process, in the the 1st and the 2nd recessed of the 1st and the 2nd spacer 55,56
The mode of the 1st and the 2nd head 54b, 54c is stored in portion 55b, 56b, the 1st and the 2nd spacer 55,56 is installed on the 1st folder
Hold plate and the 2nd grip block 52,53.
As shown in Figure 1, electro-motor 13 has：The radial outside of rotary shaft 12 is configured at relative to rotor 50 and is fixed on
The stator 57 of motor shell 41.Rotor 50 and stator 57 be configured at on 12 same axis of rotary shaft, in the radial direction of rotary shaft 12
It is upper opposite.Stator 57 has cylindric stator core 58 and is wound in the coil 59 of stator core 58.By electric current in coil 59
Flowing, rotor 50 are rotated integrally with rotary shaft 12.
In addition, in motor shell 41, it is formed with the 2nd suction inlet 60.2nd suction inlet 60 is configured at the ratio electricity of motor shell 41
Motor 13 is moved close to the position of end plate 42.It is flowed by fluid from the 2nd suction inlet 60, fluid is filled in motor chamber A3.
Centrifugal compressor 10 has：Converter (inverter, frequency converter) 61, the driving as driving electro-motor 13
Circuit；With converter box (case) (circuit box) 62, it is used to mark off converter room (circuit room) A4 of storage converter 61.
Converter box 62 is the bottomed tube of one end open, is installed from the axis direction Z of rotary shaft 12 relative to housing 11.Converter box
62 openend is docked with end plate 42 with the 2nd plate face 42b of the 1st plate face 42a opposite sides, and the opening of converter box 62 is by end plate
42 block.Converter room A4 is marked off by converter box 62 and end plate 42.Converter room A4 and motor chamber A3 divides via end plate 42
Every.In other words, end plate 42 works as the partition wall for separating motor chamber A3 and converter room A4.
According to this constitution, the fluid in converter 61 and motor chamber A3 can carry out heat exchange via end plate 42.Therefore, exist
The heat generated in converter 61 is transmitted via end plate 42 to motor chamber A3, is absorbed by the fluid in motor chamber A3.
As shown in Figure 1, in as the motor chamber A3 in housing 11, there is rotary shaft 12 (based in detail equipped with insert
Body portion 12a) the 1st and the 2nd axle sleeve 71,72.1st and the 2nd axle sleeve 71,72 is in pairs.1st and the 2nd axle sleeve 71,72 is cylinder
Shape, in detail the outer diameter same diameter for the internal diameter that has the outer diameter of the main part 12a than rotary shaft 12 big and with rotor 50
Outer diameter cylindrical shape.The axis of two axle sleeves 71,72 is consistent with the axis of main part 12a.1st and the 2nd axle sleeve 71,72 is configured
Into across rotor 50 on the axis direction Z of rotary shaft 12 relatively.
1st axle sleeve 71 from the 1st plate face 42a of end plate 42 to the axis direction Z of rotary shaft 12, in detail to the 1st rotor
End face 50a is erected.By the front end face of the 1st axle sleeve 71, in detail for the 1st axle sleeve 71 rotary shaft 12 axis direction Z end
Face is defined as the 1st end face of shaft bush 71a.1st end face of shaft bush 71a and the 1st rotor end-face 50a are configured to in the axis of rotary shaft 12
The state detached on the Z of direction is opposite.The main part 12a's of rotary shaft 12 inserts with the position equipped with front end 12b sides opposite side
Pass through the 1st axle sleeve 71.
2nd axle sleeve 72 from the bottom 41a of motor shell 41 to the axis direction Z of rotary shaft 12, in detail to the 2nd rotor
End face 50b is erected.By the front end face of the 2nd axle sleeve 72, in detail for the 2nd axle sleeve 72 rotary shaft 12 axis direction Z end
Face is defined as the 2nd end face of shaft bush 72a.2nd end face of shaft bush 72a and the 2nd rotor end-face 50b are configured to in the axis of rotary shaft 12
The state detached on the Z of direction is opposite.The position equipped with front end 12b sides of the main part 12a of rotary shaft 12 is inserted through the 2nd axis
Set 72.
By the way, as has been explained, bottom intercommunicating pore 41b in the circumferential direction of rotary shaft 12 across scheduled
It is set every being arranged with multiple states.Therefore, the bottom 41a of motor shell 41 and the 2nd axle sleeve 72 via bottom 41a from rotation
The axis direction Z of shaft 12 observe the position for not forming bottom intercommunicating pore 41b in the part Chong Die with the 2nd axle sleeve 72 and one
Body.
In addition, bottom intercommunicating pore 41b is formed as：It is Chong Die with the 2nd axle sleeve 72 from the axis direction Z from rotary shaft 12
Part and this both sides of surrounding part.Therefore, the fluid in motor chamber A3 is by being located at the bottom around the 2nd axle sleeve 72
It is flowed to the 2nd blade wheel chamber A2 the opening portion of intercommunicating pore 41b.
As shown in Figure 1 and Figure 2, it is in detail inner peripheral surface 71b, 72b of axle sleeve 71,72 and rotation in axle sleeve 71,72
Between the peripheral surface 12c of shaft 12 (12a based in detail), it is provided with support to rotate by rotary shaft 12
1 and the 2nd radial bearing 81,82.
1st and the 2nd radial bearing 81,82 is the contactless type hydrodynamic bearing of such as deflection formula.For example, it is set to
The 1st radial bearing 81 between 1 axle sleeve 71 and rotary shaft 12 has radially top foil (top foil) 83,83 phase of radial direction top foil
The radial outside of rotary shaft 12 is set to for the peripheral surface 12c of rotary shaft 12, in the rotation of rotary shaft 12 with discontiguous
State supports rotary shaft 12.Radially top foil 83 is configured to, can be in the radially displacement of rotary shaft 12, on the other hand, will not companion
It is rotated with the rotation of rotary shaft 12.In detail, for example, radially top foil 83 is not formed as the ring-type being closed completely, and
It is the tubular of the thin plate of part shortcoming.Radially top foil 83 has：The inner peripheral surface of the 1st axle sleeve 71 is fixed in fixed end
71b；And free end, it is to be detached in the circumferential with the end of fixed end opposite side and with fixed end, by these ends
As circumferential both ends.In this case, radially top foil 83 is limited rotation, on the other hand, can by flexible deformation
So that the mode that formation gap between foil 83 and the peripheral surface 12c of rotary shaft 12 is pushed up in the radial direction shifts.
In addition, the 1st radial bearing 81 has radial wave foil (bump foil) 84, the radial wave foil 84 is relative to radially
Top foil 83 is set to the radial outside of rotary shaft 12, and radial direction top foil 83 is flexibly supported.Radial wave foil 84 has to rotation
Multiple protrusions that the radially inner side of axis 12 protrudes surround radially top foil 83 with multiple protrusions with the state that radial direction top foil 83 abuts.
Radial wave foil 84 in a manner of multiple protrusion be collapseds flexible deformation, be restored to original shape, thus with can be in rotary shaft 12
The state radially moved to radial direction top foil 83 flexibly support.By the way, in radial direction top foil 83 and radial wave foil
Radial clearance 85 is formed between 84.Radial clearance 85 is open on the axis direction Z of rotary shaft 12.
According to this constitution, when rotary shaft 12 rotates, by the dynamic pressure (power) generated by the rotation of the rotary shaft 12, with
The discontiguous state in gap is radially formed between top foil 83 and the peripheral surface 12c of rotary shaft 12, rotary shaft 12 is supported
It can rotate.In addition, the 2nd radial bearing 82 being set between the 2nd axle sleeve 72 and rotary shaft 12 is also the same.
As shown in Figure 1 and Figure 2, centrifugal compressor 10 has the thrust for bearing to be generated due to the rotation of two impellers 14,15
The the 1st and the 2nd thrust bearing 91,92.Two thrust bearings 91,92 are configured at rotation in motor chamber A3 relative to rotor 50
The both sides of the axis direction Z of axis 12.In detail, the 1st thrust bearing 91 is set to the 1st rotor end-face 50a and the 1st end face of shaft bush
Between 71a, the 2nd thrust bearing 92 is set between the 2nd rotor end-face 50b and the 2nd end face of shaft bush 72a.
In the present embodiment, the 1st and the 2nd thrust bearing 91,92 is contactless type hydrodynamic bearing, by by rotor 50
The dynamic pressure for rotating and generating, to divide between the 1st and the 2nd thrust bearing 91,92 and the 1st and the 2nd rotor end-face 50a, 50b
It is not formed with the discontiguous state in gap, bears thrust.
1st and the 2nd thrust bearing 91,92 is identical composition other than symmetrical this point.Therefore, it is pushed away to the 1st
Power bearing 91 is described in detail, and the detailed description of the 2nd thrust bearing 92 is omitted.
1st thrust bearing 91 is cyclic annular (being in detail annular shape) as a whole.1st thrust bearing 91 has thrust top
Foil (thrust top foil) 93 and thrust wave foil (thrust bump foil) 94.Thrust top foil 93 is in the 1st end face of shaft bush
71a between the 1st rotor end-face 50a the same as being configured at compared with the 1st end face of shaft bush 71a closer to the position of the 1st rotor end-face 50a.
Thrust wave foil 94 more connects in the 1st rotor end-face 50a with being configured between the 1st end face of shaft bush 71a compared with the 1st rotor end-face 50a
The position of nearly 1st end face of shaft bush 71a.
Thrust top foil 93 has such as fan-shaped and laminal multiple top foils by being arranged side by side in the circumferential direction of rotary shaft 12
It partly forms, is integrally formed as cyclic annular (being in detail annular shape).Thrust top foil 93 is configured to, can be in rotary shaft
It shifts on 12 axis direction Z, on the other hand, will not be rotated along with the rotation of rotary shaft 12.For example, multiple top foil parts
Circumferential one end respectively become the fixation end for being fixed on the 1st end face of shaft bush 71a, on the other hand, other termination portion respectively into
For free end.
Thrust wave foil 94 has multiple wave foil parts of such as fan-shaped by being arranged side by side in the circumferential direction of rotary shaft 12 and structure
Into being integrally formed as cyclic annular (being in detail annular shape).Multiple wave foil parts have the axis direction Z in rotary shaft 12
The protrusion protruded above is fixed on the 1st with the protrusion with the state that thrust top foil 93 abuts (in detail for multiple top foil parts)
End face of shaft bush 71a.Thrust wave foil 94 in a manner of the be collapsed of protrusion flexible deformation, be restored to original shape, thus with can be
The state shifted on the axis direction Z of rotary shaft 12 flexibly supports thrust top foil 93.In addition, in thrust top foil 93 with pushing away
Thrust clearance 95 is formed between Reeb foil 94.Thrust clearance 95 is in the radial opening of rotary shaft 12.That is, fluid can be via pushing away
Power gap 95 and flowed between the radially inner side and radial outside of the 1st thrust bearing 91.
According to this constitution, when rotary shaft 12 rotates, by dynamic pressure and in thrust top foil 93 and the 1st rotor end-face 50a
Between be formed with the discontiguous state in gap, rotor 50 is propped up by the 1st thrust bearing 91 (being in detail thrust top foil 93)
Support.In this case, the 1st thrust bearing 91 bears the thrust acted on the axis direction Z of rotary shaft 12.
Herein, the outer diameter of the 1st thrust bearing 91, the in detail outer diameter for thrust top foil 93 and thrust wave foil 94,
It is set as identical with the outer diameter of 50 and the 1st axle sleeve 71 of rotor.The internal diameter of 1st thrust bearing 91 is thrust top foil in detail
93 and the internal diameter of thrust wave foil 94, the outer diameter for being set to main part 12a than rotary shaft 12 is big.Accordingly, with respect to the 1st thrust
Bearing 91 is formed with and thrust in the radially inner side of rotary shaft 12, in detail between the 1st thrust bearing 91 and rotary shaft 12
The inner space A5 that gap 95 connects.Moreover, in the both ends of the axis direction Z of the 1st radial bearing 81 close to the 1st rotor-end
Expose in the inner space A5 of the 1st thrust bearing 91 end of face 50a.That is, thrust clearance 95 is pushed away with radial clearance 85 via the 1st
The inner space A5 of power bearing 91 and connect.Inner space A5 corresponds to " relative to thrust bearing in inside radially of the axis of rotation
The space of formation ".
By the way, as shown in Fig. 2, in the present embodiment, the internal diameter of the 1st thrust bearing 91 is set to than the 1st axis
The internal diameter of set 71 is small.In other words, the inner circumferential end 91a of the 1st thrust bearing 91 is detached with the peripheral surface 12c of rotary shaft 12, and is compared
The radially inner side of inner peripheral surface 71b to the rotary shaft 12 of 1st axle sleeve 71 is prominent.
As shown in Figure 1, centrifugal compressor 10 forms a part for Vehicular air-conditioning apparatus 100.That is, as in present embodiment
Centrifugal compressor compressed object fluid be refrigerant.
Vehicular air-conditioning apparatus 100 is also equipped with condenser 101, gas-liquid separator 102, expansion valve in addition to centrifugal compressor 10
103 and evaporator 104.These condensers 101, gas-liquid separator 102, expansion valve 103 and evaporator 104 connect via piping
It connects.In addition, condenser 101 is connected to the 1st outlet 33, evaporator 104 is connected to the 2nd suction inlet 60.In addition, vehicle air conditioning fills
Put 100 pipings 105 for having the 2nd outlet 36 of connection and the 1st suction inlet 30.
Next, the effect as present embodiment, empty to the centrifugal compressor 10 and vehicle that form as described above
The flowing of the fluid in device 100 is adjusted to illustrate.
When two impellers 14,15 are rotated along with the rotation of rotary shaft 12, the comparison low pressure discharged from evaporator 104
Fluid (hereinafter referred to as sucking fluid) is sucked from the 2nd suction inlet 60.In this case, motor chamber A3 becomes low-voltage space.Quilt
The sucking fluid for being drawn into motor chamber A3 flows to the 2nd blade wheel chamber A2.Moreover, sucking centrifugal action of the fluid by the 2nd impeller 15
And the 2nd discharge room 35 is sent to by the 2nd divergent flow path 34 from the 2nd blade wheel chamber A2, and discharged from the 2nd outlet 36.Separately
Outside, the pressure for being present in the pressure ratio sucking fluid of the fluid of the 2nd discharge room 35 is high.The stream that will be discharged from the 2nd outlet 36
Pressure fluid during body is known as.
In addition, a part for the sucking fluid in motor chamber A3, by being set to the 1st and the 2nd rotor end-face 50a, 50b
The the 1st and the 2nd thrust bearing 91,92 supply between the 1st and the 2nd end face of shaft bush 71a, 72a, and via the 1st and
The thrust clearance 95 and inner space A5 of 2nd thrust bearing 91,92 and by the 1st and the 2nd radial bearing 81,82 supply.
In this condition, rotated by rotary shaft 12, the 1st and the 2nd thrust bearing 91,92 and the 1st and the 2nd radial bearing 81,
82 generate dynamic pressures, as a result, rotary shaft 12 is non-contiguously supported in the radial direction of rotary shaft 12 and axis direction Z this both sides.
In this case, thrust is born by the 1st and the 2nd thrust bearing 91,92.
In addition, as shown in Figure 1, middle pressure fluid is inhaled into via piping 105 in the 1st suction inlet 30.Middle pressure fluid passes through
The centrifugal action of 1st impeller 14 and by from the 1st blade wheel chamber A1 by the 1st divergent flow path 31 be sent to the 1st discharge room 32, and by from
1st outlet 33 is discharged.It is high by the pressure of the pressure fluid from the pressure ratio of discharge fluid that the 1st outlet 33 is discharged.
According to present embodiment described in detail above, following effect is played.
(1) centrifugal compressor 10 has：Rotary shaft 12；Electro-motor 13 has the rotor 50 for being installed on rotary shaft 12,
Rotate rotary shaft 12；Impeller 14,15, they are rotated along with the rotation of rotary shaft 12, and thus fluid is compressed；With
Housing 11 stores these rotary shafts 12, electro-motor 13 and impeller 14,15.It is set in addition, centrifugal compressor 10 has
In housing 11, insert has the 1st and the 2nd axle sleeve 71,72 of rotary shaft 12.
Between the 1st axle sleeve 71 and rotary shaft 12, it is provided with the 1st radial bearing for supporting to rotate by rotary shaft 12
81, between the 2nd axle sleeve 72 and rotary shaft 12, it is provided with the 2nd radial bearing 82 for supporting to rotate by rotary shaft 12.
Rotor 50 has the 1st and the 2nd rotor end-face for being located at opposite side mutually on the axis direction Z of rotary shaft 12
50a、50b.Axis direction Zs of the 1st rotor end-face 50a on the axis direction Z of rotary shaft 12 with the rotary shaft 12 of the 1st axle sleeve 71
End face i.e. the 1st end face of shaft bush 71a it is opposite.2nd rotor end-face 50b on the axis direction Z of rotary shaft 12 with the 2nd axle sleeve 72
The end face of the axis direction Z of rotary shaft 12 i.e. the 2nd end face of shaft bush 72a is opposite.
Moreover, between the 1st and the 2nd rotor end-face 50a, 50b and the 1st and the 2nd end face of shaft bush 71a, 72a, respectively
It is provided with the 1st and the 2nd thrust bearing 91,92 for bearing thrust.
According to this constitution, rotor 50 works as the thrust liner of the 1st and the 2nd thrust bearing 91,92 of support.By
This, compared with dedicated thrust being set to pad and rotor 50 pads the composition that both sides rotate with thrust, it is possible to realize windage losses
Reduction.Thereby, it is possible to seek the raising of efficiency.
In addition, in order to inhibit to wear, usually between the rotor of rotation 50 and non-rotary 1st and the 2nd axle sleeve 71,72
Form space.The space easily becomes wasted space (dead space).In contrast, in the present embodiment, such
The the 1st and the 2nd thrust bearing 91,92 is respectively arranged between 50 and the 1st and the 2nd axle sleeve 71,72 of rotor, so it is possible to realize
Wasted space is effectively applied flexibly.In addition, it is not necessary that setting pads for storing the 1st and the 2nd thrust bearing 91,92 and thrust
Dedicated room, so the miniaturization it is possible to realize centrifugal compressor 10.
(2) and then, in the composition of base end part that thrust liner is set to rotary shaft 12, assembly orientation during manufacture needs
To be from the 1st and the 2nd impeller 14,15 towards the direction of electro-motor 13 and with the party's this 2 direction groups in the opposite direction
Dress.In contrast, in the present embodiment, assembly orientation is only from the 1st and the 2nd impeller 14,15 towards the 1 of electro-motor 13
A direction.Thereby, it is possible to seek the facilitation of the manufacture of centrifugal compressor 10.
(3) the 1st and the 2nd thrust bearing 91,92 is respectively arranged at the two of the axis direction Z of the rotary shaft 12 of rotor 50
Side.In detail, the 1st and the 2nd axle sleeve 71,72 is configured to：Across rotor 50 on the axis direction Z of rotary shaft 12 mutually
Relatively.Moreover, the 1st end face of shaft bush 71a and the 1st turn of the 1st axle sleeve 71 opposite on the axis direction Z mutually in rotary shaft 12
The 1st thrust bearing 91, the 2nd opposite axle sleeve 72 on the axis direction Z mutually in rotary shaft 12 are equipped between sub- end face 50a
The 2nd thrust bearing 92 is equipped between 2nd end face of shaft bush 72a and the 2nd rotor end-face 50b.
According to this constitution, can bear thrust from the 1st thrust bearing 91 towards the 1st direction of the 2nd thrust bearing 92 and
With this both sides of the thrust in the 2nd direction of the 1st direction opposite direction.
(4) rotor 50 has：The multiple electromagnetic steel plates 51 being laminated on the axis direction Z of rotary shaft 12；From rotary shaft 12
Axis direction Z clamp the 1st grip block and the 2nd grip block 52,53 of multiple electromagnetic steel plates 51；With make multiple electromagnetic steel plates 51
The rivet 54 linked with the 1st grip block and the 2nd grip block 52,53.Rivet 54 has：It is inserted through multiple electromagnetic steel plates 51 and
The trunk 54a of 1 grip block and the 2nd grip block 52,53；With the axis direction Z's of rotary shaft 12 that is set to trunk 54a
1st and the 2nd head 54b, the 54c at both ends.
Rotor 50 has the 1st and the 2nd spacer 55,56, and the 1st and the 2nd spacer 55,56 has：With the 1st folder
Hold the 1st and the 2nd bearing surface 55a, 56a of clamping lateral surface 52c, 53c abutting of plate and the 2nd grip block 52,53；And match
It is placed in the 1st and the 2nd rotor end-face 50a, 50b with the 1st and the 2nd bearing surface 55a, 56a opposite side.
And then the 1st and the 2nd spacer 55,56 have the 1st and second recesses 55b, 56b, using these recess portions as receipts
Receive the 1st and the 2nd incorporating section of the 1st and the 2nd head 54b, 54c.According to this constitution, the 1st and the 2nd thrust bearing 91,92
It is respectively arranged between the 1st and the 2nd spacer 55,56 and the 1st and the 2nd axle sleeve 71,72.
In this case, the 1st and the 2nd head 54b, 54c of rivet 54 is accommodated in the 1st and second recesses 55b, 56b.
As a result, for the 1st and the 2nd thrust bearing 91,92, the 1st and the 2nd head 54b, 54c is difficult to counteract.
In the composition linked up as a result, in multiple electromagnetic steel plates 51 and grip block 52,53 by rivet 54, Neng Gouhe
1st and the 2nd thrust bearing 91,92 is set suitablely.
Particularly, it is that thrust is non-contiguously born by the dynamic pressure generated when rotor 50 rotates in thrust bearing 91,92
Contactless type hydrodynamic bearing in the case of, due to because head 54b, 54c caused by when rotor 50 rotates fluid stream
During dynamic upper generation disorder, obstacle can be generated on thrust is born.
In contrast, in the present embodiment, the 1st and the 2nd head 54b, 54c be accommodated in the 1st and second recesses 55b,
56b, so being difficult to generate the disorder of the flowing of fluid as caused by the 1st and the 2nd head 54b, 54c.Thereby, it is possible to inhibit by
Composition for linking multiple electromagnetic steel plates 51 and the 1st grip block and the 2nd grip block 52,53 causes and is produced on thrust is born
Give birth to the bad of obstacle.
(5) herein, it is also considered that for example form recess portion in the 1st grip block and the 2nd grip block 52,53.However, in rivet
In 54 characteristic, the riveting for needing the front end be collapsed into the trunk 54a for being about to insert and forming head is processed.If
1st grip block and the 2nd grip block 52,53 have recess portion, then riveting processing is difficult to, and easily generate what rivet 54 carried out
Connection (riveting) becomes inadequate bad.
In contrast, in the present embodiment, the 1st is separately equipped with except the 1st grip block and the 2nd grip block 52,53
And the 2nd spacer 55,56, so installing the 1st and the 2nd spacer 55,56 after above-mentioned riveting processing is carried out.By
This, can inhibit above-mentioned bad.
(6) 51 and the 1st and the 2nd spacer 55,56 of electromagnetic steel plate is viewed as annulus from the axis direction Z of rotary shaft 12
Shape.Moreover, the 1st and the 2nd thrust bearing 91,92 is viewed as and the 1st and the 2nd spacer from the axis direction Z of rotary shaft 12
55th, the annular shape of 56 overlappings.
According to this constitution, the centrifugal force generated when rotated in rotor 50 can be inhibited corresponding to circumferential position and become
It is dynamic, so the rotation of the stabilization of rotor 50 can be realized.In addition, the 1st and the 2nd thrust bearing 91,92 and electromagnetic steel plate 51 and
1st and the 2nd spacer 55,56 is opposite to should be circular, so compared with such as elliptical shape, the easy to increase 1st and
The area of 2nd thrust bearing 91,92.The power that can be born thereby, it is possible to improve the 1st and the 2nd thrust bearing 91,92.
(7) the 1st and the 2nd thrust bearing 91,92 is contactless type hydrodynamic bearing, passes through what is generated by the rotation of rotor 50
Dynamic pressure, in the 1st and the 2nd thrust bearing 91,92 (in detail for thrust top foil 93) and the 1st and the 2nd rotor end-face
The discontiguous state that gap is respectively formed between 50a, 50b bears thrust.In this case it is assumed that at the 1st and the 2nd turn
Sub- end face 50a, 50b are formed with bumps, due to the bumps, disorder can be generated in the flowing of fluid, the flowing of the fluid makes
It obtains and generates dynamic pressure between the 1st and the 2nd rotor end-face 50a, 50b and the 1st and the 2nd thrust bearing 91,92.Then, it can produce
Raw above-mentioned dynamic pressure reduces bad.
In contrast, in the present embodiment, the 1st and the 2nd rotor end-face 50a, 50b is pressed from both sides than the 1st grip block and the 2nd
The plate face (being in detail the 1st and the 2nd clamping lateral surface 52c, 53c) for holding plate 52,53 is flat.Thereby, it is possible to inhibit above-mentioned
It is bad, so the 1st and the 2nd thrust bearing 91,92 can be made suitably to act.
(8) the 1st and the 2nd thrust bearing 91,92 has a thrust top foil 93, and thrust top foil 93 is respectively arranged at and the
1 and the 2nd end face of shaft bush 71a, 72a compares the position closer to the 1st and the 2nd rotor end-face 50a, 50b, in rotary shaft 12
Rotor 50 is supported with discontiguous state during rotation.
In addition, the 1st and the 2nd thrust bearing 91,92 has thrust wave foil 94, the thrust wave foil 94 is configured at and the 1st
And the 2nd rotor end-face 50a, 50b compare position closer to the 1st and the 2nd end face of shaft bush 71a, 72a, by flexible deformation,
With the state support thrust top foil 93 that can be shifted on the axis direction Z of rotary shaft 12.According to this constitution, pass through thrust wave foil
94 flexible deformations can suitably bear thrust.
In addition, in the case where centrifugal compressor 10 produces the vibration of axis direction Z of rotary shaft 12, which passes through
94 flexible deformation of thrust wave foil and absorb.Thereby, it is possible to the vibration by the axis direction Z of rotary shaft 12 be inhibited to cause so as to the 1st
And the 2nd rotor end-face 50a, 50b and the 1st and the 2nd end face of shaft bush 71a, 72a situation about sliding.Thereby, it is possible to suitably right
It should vibrate.
(9) the 1st and the 2nd radial bearing 81,82 has respectively：Radially top foil 83, relative to the periphery of rotary shaft 12
Face 12c is set to the radial outside of rotary shaft 12；With radial wave foil 84, rotary shaft 12 is set to relative to radial direction top foil 83
Radial outside.Radially top foil 83 supports rotary shaft 12 in the rotation of rotary shaft 12 with discontiguous state.84 bullet of radial wave foil
Property support radially top foil 83.1st and the 2nd thrust bearing 91,92 is the ring-type with the long internal diameter of the diameter than rotary shaft 12,
Relative to the 1st and the 2nd thrust bearing 91,92 inner space A5 is formed in the radially inner side of rotary shaft 12.
In this composition, the radial clearance 85 and the 1st of the axis direction Z openings in rotary shaft 12 of the 1st radial bearing 81
The thrust clearance 95 of the radial opening in rotary shaft 12 of thrust bearing 91 connects via the inner space A5 of the 1st thrust bearing 91
It is logical.
Fluid in motor chamber A3 (in the present embodiment to suck fluid) pushing away via the 1st thrust bearing 91 as a result,
Power gap 95 and inner space A5 are supplied to the 1st radial bearing 81.Therefore, it is centripetal the 1st in the rotation of rotary shaft 12
Bearing 81 generates necessary dynamic pressure.
Thereby, it is possible to inhibit because being equipped with the 1st thrust bearing 91 between the 1st end face of shaft bush 71a and the 1st rotor end-face 50a
And can generate bad, this is bad to be in detail：It is limited due to 1 thrust bearing 91 to the 1st radial bearing 81 and supplies fluid,
Obstacle is generated to the action of the 1st radial bearing 81.It is also the same for the 2nd radial bearing 82 and the 2nd thrust bearing 92.
(10) particularly, the inner circumferential end 91a of the 1st thrust bearing 91 is detached, and ratio the 1st with the peripheral surface 12c of rotary shaft 12
The radially inner side of inner peripheral surface 71b to the rotary shaft 12 of axle sleeve 71 is prominent.Thereby, it is possible to the area of the 1st thrust bearing 91 is sought to carry
Height, so the thrust that can be born can be improved.It is also the same for the 2nd thrust bearing 92.
(11) centrifugal compressor 10 has：Drive the converter 61 of electro-motor 13；With converter box 62, storage is become
The converter room A4 of parallel operation 61 carries out division formation, and housing 11 is installed on from the axis direction Z of rotary shaft 12.Housing 11 has：
Motor chamber A3 stores electro-motor 13, and sucks fluid from the 2nd suction inlet 60；With the end plate 42 as partition wall, to horse
It is separated up to room A3 and converter room A4.
According to this constitution, converter 61 carries out heat exchange via the fluid in end plate 42 and motor chamber A3.Thereby, it is possible to make
Converter 61 is cooled down with the fluid in motor chamber A3.
Particularly, in the present embodiment, between converter room A4 and motor chamber A3, it is not provided with storage thrust bearing
And the thrust chamber of thrust liner.Therefore, it is possible to which the fluid in motor chamber A3 is used suitably to cool down converter 61.As a result, can
Enough fevers for suitably inhibiting converter 61.
(12) centrifugal compressor 10 has the 1st impeller 14 being configured in a manner that cardinal extremity face 14a, 15a are opposite each other
And the 2nd impeller 15.Into motor chamber A3, sucking fluid is sucked from the 2nd suction inlet 60.In addition, motor chamber A3 and the 2nd leaf of storage
2nd blade wheel chamber A2 of wheel 15 is connected, the 2nd impeller 15 to the sucking fluid that is drawn into from motor chamber A3 in the 2nd blade wheel chamber A2 into
Row compression.1st impeller 14 by 15 compressed middle pressure fluid of the 2nd impeller to being compressed.
According to this constitution, in motor chamber A3, stuffing pressure is than relatively low sucking fluid.Thereby, it is possible to seek to be set to
The reduction of the windage loss of rotor 50 in motor chamber A3.
In addition, the above embodiment can also change as described below.
Zero as shown in figure 3, can also omit the 1st outlet 33 and the 2nd suction inlet 60.In this case, centrifugation pressure
Contracting machine 10 can also have the 1st discharge room 32 of connection and the middle pressure mouth 110 of motor chamber A3.Middle pressure mouth 110 is in the axis of rotary shaft 12
The bottom 41a of middle section 23, part 2 22 and motor shell 41 is penetrated through on the Z of line direction.In addition, condenser 101 is connected to
2nd outlet 36, the 1st suction inlet 30 are connected to evaporator 104.
According to this constitution, the fluid discharged from evaporator 104, sucked from the 1st suction inlet 30, the 1st blade wheel chamber A1 →
The divergent flow path of the blade wheel chamber A2 of 1st divergent flow path the 31 → the 1st discharge room 32 → middle pressure 110 → motor chamber of mouth A3 → the 2nd → the 2nd 34 →
Pass through in 2nd discharge room 35, discharged from the 2nd outlet 36.In this case, in motor chamber A3, filled with middle pressure fluid.
Zero can also omit either side in the 1st and the 2nd thrust bearing 91,92.
0 the 1st and the 2nd the construction of thrust bearing 91,92 can also be different.
Zero can also be in the 1st axle sleeve 71 equipped with the through hole radially penetrated through in rotary shaft 12.The through hole preferably makes
Space between 1st radial bearing 81 and end plate 42 and be located at relative to the 1st axle sleeve 71 rotary shaft 12 radial outside space
Connection.Thereby, it is possible to more suitably supply fluid to the 1st radial bearing 81.
The outer diameter of the outer diameter and the 1st and the 2nd axle sleeve 71,72 of zero rotor 50 can also be different.In this case, thrust axis
91,92 outer diameter is held to be preferably set for and the shorter side in the outer diameter of the outer diameter of rotor 50 and the 1st and the 2nd axle sleeve 71,72
It is identical or shorter than its.
Zero in addition, the internal diameter of the 1st and the 2nd thrust bearing 91,92 can also be set as the 1st and the 2nd axle sleeve 71,72
It is more than internal diameter.
Zero electromagnetic steel plate 51 can also be viewed as non-annular from the axis direction Z of rotary shaft 12.In this case, can
Improve the saliency of rotor 50.In this composition, spacer 55,56 is preferably viewed as annulus from the axis direction Z of rotary shaft 12
Shape.Thereby, it is possible to improve the saliency of rotor 50, and suitably thrust is born using the 1st and the 2nd thrust bearing 91,92.
In addition, it's not limited to that, it can also be corresponding with the shape of electromagnetic steel plate 51 so that the 1st grip block and the 2nd
Grip block 52,53 and the 1st and the 2nd spacer 55,56 are also non-annular, can also make axle sleeve 71,72 also from rotary shaft
12 axis direction Z is viewed as non-circular tubular.
Zero can also omit the 1st and the 2nd spacer 55,56.In this case, the 1st grip block and the 2nd grip block
52nd, 53 the 1st and the 2nd clamping lateral surface 52c, 53c forms the 1st and the 2nd rotor end-face 50a, 50b.Alternatively, it is also possible to
The the 1st and the 2nd clamping lateral surface 52c, 53c of 1st grip block and the 2nd grip block 52,53, forms storage the 1st and the 2nd
The recess portion of portion 54b, 54c.Alternatively, it is also possible to which only the either side of the 1st and the 2nd spacer 55,56 is omitted.
Zero incorporating section is not limited to recess portion or for example in the plate thickness direction of the 1st and the 2nd spacer 55,56
The through hole of upper perforation.
Zero for make composition that multiple 51 and the 1st grip blocks of electromagnetic steel plate and the 2nd grip block 52,53 link up and
Them is made to be not limited to rivet 54 with the composition that rotor 50 rotates integrally, is arbitrary.In short, multiple electromagnetic steel plates 51 and
1 grip block and the 2nd grip block 52,53 by interlink state, rotation is fixed in a manner of being rotated integrally with rotor 50
Axis 12.
0 the 1st and the 2nd thrust bearing 91,92 be the foil with thrust top foil 93 Yu thrust wave foil 94, it is but and unlimited
Due to this, as long as thrust can be born, specific form is arbitrary.It is also the same for two radial bearings 81,82.
Zero can also omit either side in the 1st and the 2nd impeller 14,15.It in this case can also will be with being saved
The corresponding divergent flow path of impeller slightly and discharge room are omitted.
The carrying object of zero centrifugal compressor 10 is not limited to vehicle, is arbitrary.
The centrifugal compressor 10 of zero embodiment is used for a part for Vehicular air-conditioning apparatus 100, but it's not limited to that,
It can be used for other purposes.For example, it is fuel-cell vehicle (the FCV for being equipped with fuel cell in vehicle：Fuel Cell
Vehicle in the case of), which can be used for the feedway to above-mentioned fuel cell supply air.Always
It, it can also be air etc. that the fluid of compressed object, which can be refrigerant, and fluid means is not limited to Vehicular air-conditioning apparatus
100, it is arbitrary.
Claims (8)
1. a kind of centrifugal compressor, which has：
Rotary shaft；
Electro-motor has the rotor for being installed on the rotary shaft, rotates the rotary shaft；
Impeller rotates along with the rotation of the rotary shaft, thus fluid is compressed；
Housing stores the rotary shaft, the electro-motor and the impeller；
The axle sleeve of tubular is set in the housing, is inserted for the rotary shaft；With
Radial bearing is set between the axle sleeve and the rotary shaft, and the rotary shaft is supported to rotate,
Wherein,
The rotor have rotor end-face, the rotor end-face be the rotor, the rotary shaft axis direction end face,
The axle sleeve have end face of shaft bush, the end face of shaft bush be the axle sleeve, the rotary shaft axis direction end face,
The rotor end-face and the end face of shaft bush are relative to each other on the axis direction of the rotary shaft,
The centrifugal compressor has and bears due to the rotation of the impeller between the rotor end-face and the end face of shaft bush
The thrust bearing of the thrust of generation.
2. centrifugal compressor according to claim 1, wherein,
The axle sleeve is the 1st axle sleeve, and the centrifugal compressor is also equipped with 2nd axle sleeve pairs of with the 1st axle sleeve, the described 1st
Axle sleeve and the 2nd axle sleeve are configured to, across the rotor on the axis direction of the rotary shaft relative to each other,
There is the rotor the 1st rotor end-face and the 2nd rotor end-face to be used as the rotor end-face, and the 2nd rotor end-face exists
On the axis direction of the rotary shaft be located at the 1st rotor end-face opposite side,
There is 1st axle sleeve the 1st end face of shaft bush to be used as the end face of shaft bush, the 1st end face of shaft bush and the 1st rotor
End face is relative to each other on the axis direction of the rotary shaft,
There is 2nd axle sleeve the 2nd end face of shaft bush to be used as the end face of shaft bush, the 2nd end face of shaft bush and the 2nd rotor
End face is relative to each other on the axis direction of the rotary shaft,
The thrust bearing is the 1st thrust bearing being set between the 1st rotor end-face and the 1st end face of shaft bush,
The centrifugal compressor is also equipped with the 2nd thrust axis being set between the 2nd rotor end-face and the 2nd end face of shaft bush
It holds.
3. centrifugal compressor according to claim 2, wherein,
The rotor has：
Multiple electromagnetic steel plates, the multiple electromagnetic steel plate are laminated on the axis direction of the rotary shaft；
1st grip block and the 2nd grip block, the 1st grip block and the 2nd grip block are from the axis side of the rotary shaft
To the multiple electromagnetic steel plate of clamping；
Rivet has：It is inserted through the multiple electromagnetic steel plate and the trunk of the 1st grip block and the 2nd grip block
Portion；Expand and be set to the of the both ends of the axis direction of the rotary shaft of the trunk with trunk described in diameter ratio
1 head and the 2nd head；
1st spacer, has：The 1st bearing surface abutted with the plate face of the 1st grip block；It is configured at and is abutted with the described 1st
The 1st rotor end-face of face opposite side；With the 1st incorporating section for storing the 1st head；With
2nd spacer, has：The 2nd bearing surface abutted with the plate face of the 2nd grip block；It is configured at and is abutted with the described 2nd
The 2nd rotor end-face of face opposite side；With the 2nd incorporating section for storing the 2nd head.
4. centrifugal compressor according to claim 3, wherein,
1st thrust bearing is contactless type hydrodynamic bearing, by rotating the dynamic pressure to generate by the rotor, with described
The discontiguous state that gap is formed between 1st thrust bearing and the 1st rotor end-face bears the thrust,
2nd thrust bearing is contactless type hydrodynamic bearing, by rotating the dynamic pressure to generate by the rotor, with described
The discontiguous state that gap is formed between 2nd thrust bearing and the 2nd rotor end-face bears the thrust,
1st rotor end-face and the 2nd rotor end-face, than the plate face of the 1st grip block and the 2nd grip block
It is flat.
5. the centrifugal compressor according to any one in Claims 1 to 4, wherein,
The thrust bearing has：
Thrust top foil, it is closer compared with the end face of shaft bush with being configured between the rotor end-face in the end face of shaft bush
The position of the rotor end-face supports the rotor when the rotary shaft is rotated with discontiguous state；With
Thrust wave foil, it is closer compared with the rotor end-face with being configured between the rotor end-face in the end face of shaft bush
The position of the end face of shaft bush, by flexible deformation, thrust top foil can be made on the axis direction of the rotary shaft
The state support thrust top foil of displacement.
6. centrifugal compressor according to claim 5, wherein,
The radial bearing has：
Radially top foil is set to the outside radially of the axis of rotation, in the rotation relative to the peripheral surface of the rotary shaft
The rotary shaft is supported with discontiguous state when axis rotates；With
Radial wave foil is configured at the outside radially of the axis of rotation relative to radial direction top foil, to radial direction top foil into
Row resilient support,
The thrust bearing is the ring-type with the long internal diameter of the diameter than the rotary shaft, relative to the thrust bearing described
Inside is formed with space radially of the axis of rotation,
The radial clearance that is formed between radial direction top foil and the radial wave foil and be formed in thrust top foil with it is described
Thrust clearance between thrust wave foil is connected via the space.
7. the centrifugal compressor according to any one in claim 1~6, wherein,
Have：
Driving circuit is driven the electro-motor；With
Circuit box marks off the circuit room stored to the driving circuit, and pacifies from the axis direction of the rotary shaft
Loaded on the housing,
The housing has：
Motor chamber stores the electro-motor and sucking fluid；With
Partition wall is separated the motor chamber and the circuit room,
Driving circuit fluid indoor with motor progress heat exchange via the partition wall.
8. centrifugal compressor according to claim 6, wherein,
The inner circumferential end of the thrust bearing is prominent to the inside radially of the axis of rotation compared with the inner peripheral surface of the axle sleeve.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015206507A JP2017078356A (en) | 2015-10-20 | 2015-10-20 | Centrifugal compressor |
| JP2015-206507 | 2015-10-20 | ||
| PCT/JP2016/080860 WO2017069122A1 (en) | 2015-10-20 | 2016-10-18 | Centrifugal compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108138793A true CN108138793A (en) | 2018-06-08 |
Family
ID=58557014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680060774.0A Withdrawn CN108138793A (en) | 2015-10-20 | 2016-10-18 | Centrifugal compressor |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20190055954A1 (en) |
| JP (1) | JP2017078356A (en) |
| CN (1) | CN108138793A (en) |
| DE (1) | DE112016004797T8 (en) |
| WO (1) | WO2017069122A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112368481A (en) * | 2018-09-14 | 2021-02-12 | 开利公司 | Compressor configured to control pressure against magnetic motor thrust bearing |
| US11560900B2 (en) | 2020-06-09 | 2023-01-24 | Emerson Climate Technologies, Inc. | Compressor driveshaft assembly and compressor including same |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017155972A2 (en) * | 2016-03-08 | 2017-09-14 | Fluid Handling Llc | Center bushing to balance axial forces in multi-stage pumps |
| DE102018200681A1 (en) * | 2018-01-17 | 2019-07-18 | Audi Ag | Fuel cell system with a compressor associated medium pressure extraction and use of such a fuel cell system |
| JP6887968B2 (en) * | 2018-03-28 | 2021-06-16 | ダイキン工業株式会社 | Thrust magnetic bearing and turbo compressor with it |
| DE102018222351A1 (en) * | 2018-12-19 | 2020-06-25 | Robert Bosch Gmbh | Housing with at least one foil bearing and compressor |
| JP7204524B2 (en) * | 2019-02-25 | 2023-01-16 | 三菱重工コンプレッサ株式会社 | compressor |
| CN112483430A (en) * | 2019-09-12 | 2021-03-12 | 开利公司 | Centrifugal compressor and refrigeration device |
| FR3122708A1 (en) * | 2021-05-06 | 2022-11-11 | IFP Energies Nouvelles | Electrified Gas Compressor with Dual Compression Stage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5129795A (en) * | 1991-05-31 | 1992-07-14 | Powerdyne Corporation | Motor driven pump |
| JP2000329095A (en) * | 1999-05-17 | 2000-11-28 | Mitsubishi Heavy Ind Ltd | Compressor |
| DE102006049516B3 (en) * | 2006-10-20 | 2008-01-03 | Atlas Copco Energas Gmbh | Turbo-engine, e.g. for operating as turbo-compressor, has a rotor with radial and axial bearings in a casing with a shaft and a rotor disk fastened on the shaft |
| JP5178294B2 (en) * | 2008-04-15 | 2013-04-10 | 本田技研工業株式会社 | Electric compressor |
| KR101072327B1 (en) * | 2009-11-19 | 2011-10-11 | 현대자동차주식회사 | Electric water pump |
| JP2014128104A (en) * | 2012-12-26 | 2014-07-07 | Mitsubishi Heavy Ind Ltd | Compression system |
| JP6011571B2 (en) * | 2014-03-19 | 2016-10-19 | 株式会社豊田自動織機 | Electric turbo compressor |
| JP2015178866A (en) * | 2014-03-19 | 2015-10-08 | 株式会社豊田自動織機 | turbo type fluid machine |
| JP5858076B2 (en) * | 2014-03-20 | 2016-02-10 | 株式会社富士通ゼネラル | Compressor motor rotor |
-
2015
- 2015-10-20 JP JP2015206507A patent/JP2017078356A/en active Pending
-
2016
- 2016-10-18 DE DE112016004797.5T patent/DE112016004797T8/en not_active Expired - Fee Related
- 2016-10-18 CN CN201680060774.0A patent/CN108138793A/en not_active Withdrawn
- 2016-10-18 US US15/768,922 patent/US20190055954A1/en not_active Abandoned
- 2016-10-18 WO PCT/JP2016/080860 patent/WO2017069122A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112368481A (en) * | 2018-09-14 | 2021-02-12 | 开利公司 | Compressor configured to control pressure against magnetic motor thrust bearing |
| CN112368481B (en) * | 2018-09-14 | 2023-09-01 | 开利公司 | Compressor configured to control pressure against a magnetic motor thrust bearing |
| US11560900B2 (en) | 2020-06-09 | 2023-01-24 | Emerson Climate Technologies, Inc. | Compressor driveshaft assembly and compressor including same |
Also Published As
| Publication number | Publication date |
|---|---|
| US20190055954A1 (en) | 2019-02-21 |
| DE112016004797T8 (en) | 2018-10-11 |
| DE112016004797T5 (en) | 2018-07-19 |
| WO2017069122A1 (en) | 2017-04-27 |
| JP2017078356A (en) | 2017-04-27 |
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Application publication date: 20180608 |
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