CN110360132A - Integrated form centrifugal compressor and its core pulling method - Google Patents
Integrated form centrifugal compressor and its core pulling method Download PDFInfo
- Publication number
- CN110360132A CN110360132A CN201910767377.2A CN201910767377A CN110360132A CN 110360132 A CN110360132 A CN 110360132A CN 201910767377 A CN201910767377 A CN 201910767377A CN 110360132 A CN110360132 A CN 110360132A
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- Prior art keywords
- pressure
- compressor
- casing
- core
- bearing casing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000007689 inspection Methods 0.000 claims abstract description 14
- 230000008878 coupling Effects 0.000 claims abstract description 11
- 238000010168 coupling process Methods 0.000 claims abstract description 11
- 238000005859 coupling reaction Methods 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims description 10
- 238000012423 maintenance Methods 0.000 claims description 7
- 230000035515 penetration Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- 230000006872 improvement Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000284 extract Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- 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
- 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
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of integrated form centrifugal compressor and its core pulling methods, it is related to centrifugal compressor technical field, the integrated form centrifugal compressor, including pressure-bearing casing and the compressor machine core and motor stator core that are arranged in pressure-bearing casing, compressor machine core and motor stator core are circumferentially provided with idler wheel, compressor machine core and motor stator core are coaxially arranged, its shafting is removably connected by shaft coupling, and overall package is in pressure-bearing casing, and inspection manhole is provided on the corresponding pressure-bearing casing of linkage section, pressure-bearing casing includes compressor section casing and motor section casing, compressor section casing is bolted to connection with motor section casing.Compressor core pulling method of the invention, using the thinking of two side core-pullings, i.e. axis is disconnected from intermediate connections, the method that compressor machine core is extracted out from pressure-bearing casing non-drive side, motor stator core from pressure-bearing casing driving side respectively, realizes that unit is easily overhauled and safeguarded.
Description
Technical field
The present invention relates to centrifugal compressor technical fields, more particularly, to a kind of integrated form centrifugal compressor and its core pulling side
Method.
Background technique
Integrated form compressor set is mainly used in natural gas line pressure-increasing unit field, it is desirable that is not removing all be connected to
The disassembly of compressor inner cylinder and motor stator core is realized under the premise of process pipe on outer shell cylinder.
In order to solve the above problem, scheme conventional at present is setting guide assembly, and the guide assembly is usually by multistage cylinder
Adapter tube is formed by connecting, and guide assembly quality is big, volume is big, consumptive material is more, installation is heavy and unsightly, in addition, due to guide assembly
Quality is big, often occurs the top-heavy phenomenon of propulsive element in assembling process, inconvenient levelling.
In view of the above technical problems, the invention proposes a kind of integrated form centrifugal compressor and its complete machine core pulling methods.
Summary of the invention
The purpose of the present invention is to provide a kind of integrated form centrifugal compressor and its core pulling methods, by using two side core-pullings
Method, i.e. axis is therefrom separated, and compression machine core packet is extracted out from pressure-bearing casing non-drive side, and motor stator core is from pressure-bearing casing
Driving side extraction, to realize the purpose of integrated form centrifugal compressor Convenient inspection and maintenance.
To achieve the above object, the present invention provides following technical schemes:
A kind of integrated form centrifugal compressor provided by the invention, including pressure-bearing casing and setting are in the pressure-bearing casing
Compressor machine core and motor stator core, the compressor machine core and the motor stator core be circumferentially provided with idler wheel,
In,
The compressor machine core and the motor stator core are coaxially arranged, and shafting is by shaft coupling with dismountable side
Formula connection, and overall package is in the pressure-bearing casing, and maintenance people is provided on the corresponding pressure-bearing casing of linkage section
Hole, the pressure-bearing casing include compressor section casing and motor section casing, the compressor section casing and the motor section casing
It is bolted to connection.
As a further improvement of the present invention, the connecting end surface of the compressor section casing and the motor section casing is all provided with
It is calculated as L-type.
As a further improvement of the present invention, sealing ring is provided on the L-type connecting end surface.
As a further improvement of the present invention, the disconnected end face of the pressure-bearing casing is provided with groove, the groove
It being capable of compressor machine core and the motor stator core described in axially position.
As a further improvement of the present invention, snap ring is provided in the groove, the snap ring can be in the compressor
Positioning is limited during the integrated installation of machine core unilateral side.
As a further improvement of the present invention, the snap ring includes shearing ring and adjustment ring.
As a further improvement of the present invention, the side of the motor section casing is fixedly installed with motor side end cap.
As a further improvement of the present invention, end face idler wheel is provided on the non-driven end face of the compressor machine core.
As a further improvement of the present invention, access-hole plate, pressure-bearing casing top are provided on the inspection manhole
It is provided with electrical penetration.
Meanwhile the present invention also provides a kind of core pulling method of integrated form centrifugal compressor, include the following steps:
S1: being first turned on the access-hole plate, and staff enters in the pressure-bearing casing from the inspection manhole, disconnects
Shaft coupling between the compressor machine core and the motor stator core is set；
S2: it is then turned off the electrical penetration that pressure-bearing casing top is set；
S3: the motor side end cap of the pressure-bearing casing is dismantled later；
S4: finally from the two sides of the compressor section casing and the motor section casing, and using setting in the compression
Idler wheel on machine machine core and the motor stator core, extracts the compressor machine core and the motor stator core out respectively, into
Row inspection and maintenance.
Compared with prior art, advantageous effects of the invention:
The present invention drives integrated form centrifugal compressor, motor stator core and the coaxial cloth of compressor machine core using high-speed motor
It sets, and is provided with idler wheel thereon, shafting is connected by shaft coupling, and compressor and motor share same skid body, and overall package exists
In pressure-bearing casing, compressor machine core and electricity can be realized under the premise of not removing all process pipes being connected on outer shell cylinder
The disassembly of machine stator iron core.
Compressor core pulling method of the invention, using the thinking of two side core-pullings, i.e. axis is disconnected from intermediate connections, compressor
The method that machine core is extracted out from pressure-bearing casing non-drive side, motor stator core from pressure-bearing casing driving side respectively realizes unit just
Prompt maintenance and maintenance.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is integrated form centrofugal compressor structure schematic diagram provided by the invention；
Fig. 2 is compressor machine core core pulling direction schematic diagram provided by the invention；
Fig. 3 is motor stator core core pulling direction schematic diagram provided by the invention；
Fig. 4 is the cross-sectional view of compressor section casing provided by the invention Yu motor section casing junction；
Fig. 5 is the cross-sectional view of the disconnected end face upper groove of pressure-bearing casing provided by the invention.
In figure, 1, pressure-bearing casing；101, compressor section casing；102, compressor machine core；103, compressor spindle nose；2, spiral shell
Bolt；201, motor section casing；202, motor stator core；203, motor side end cap；204, electrical penetration；205, motor shaft
Head；3, inspection manhole；4, shaft coupling；5, groove；6, shearing ring；7, adjustment ring.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
The present invention provides a kind of integrated form centrifugal compressor and its complete machine core pulling methods, below in conjunction with FIG. 1 to FIG. 5 pair
Technical solution provided by the invention is illustrated in more detail.
As shown in Figure 1, a kind of integrated form centrifugal compressor proposed by the present invention, including pressure-bearing casing 1 and setting are being held
Compressor machine core 102 and motor stator core 202 in press shell 1, compressor machine core 102 and motor stator core 202 are circumferential
It is provided with idler wheel；
Wherein, compressor machine core 102 and motor stator core 202 are coaxially arranged, and shafting is by shaft coupling 4 with detachable
Mode connect, and overall package is provided with inspection manhole in pressure-bearing casing 1, and on the corresponding pressure-bearing casing 1 of linkage section
3, pressure-bearing casing 1 includes compressor section casing 101 and motor section casing 201, compressor section casing 101 and motor section casing 201
It is fixedly connected by bolt 2.
The present invention drives integrated form centrifugal compressor, motor stator core 202 and compressor machine core 102 using high-speed motor
It is coaxially arranged, and it is provided with idler wheel thereon, shafting is connected by shaft coupling 4, and compressor and motor share same skid body, whole
It is encapsulated in pressure-bearing casing 1, can realize compressor under the premise of not removing all process pipes being connected on outer shell cylinder
The disassembly of machine core 102 and motor stator core 202.
As an alternative embodiment, as shown in figure 4, the connection of compressor section casing 101 and motor section casing 201
End face is disposed as L-type, compressor section casing 101 and motor section casing 201, and in connecting side, there are end faces, and it is logical to design l-shaped
It crosses and is bolted, stablize safety.
As an alternative embodiment, being provided with sealing ring on L-type connecting end surface, it is anti-that sealing ring can play sealing
The effect of water.
As an alternative embodiment, as shown in figure 5, the disconnected end face of pressure-bearing casing 1 is provided with groove 5,
Groove 5 can axially position compressor machine core 102 and motor stator core 202, compressor machine core 102, motor stator core 202
Snap ring installation groove, which is designed, by the two disconnected sides in pressure-bearing casing 1 respectively carries out axially position.
As an alternative embodiment, being provided with snap ring in groove 5, snap ring can be unilateral in compressor machine core 102
Positioning is limited during integrated installation.
As an alternative embodiment, snap ring includes shearing ring 6 and adjustment ring 7, installation is for fixing machine in groove 5
The shearing ring 6 and adjustment ring 7 of core to realize the limitation positioning during the integrated installation of machine core unilateral side, and are taken by Snap ring structure
For conventional stud locking structure, compressor can be made to bear high pressure, the axial heat expansion movement of limitation machine core in the process of running.
As an alternative embodiment, the side of motor section casing 201 is fixedly installed with motor side end cap 203, it is excellent
Bolt fixed installation was gated, was readily disassembled.
As an alternative embodiment, being provided with end face idler wheel on the non-driven end face of compressor machine core 102.
All way rollers are equipped with to without outer in compressor machine core 102 and 202 bottom of motor stator core in the present invention
Realize that compressor machine core 102 and motor stator core 202 are sliding in the inner wall of guide rail and pressure-bearing casing 1 in the case where connecing guide assembly
It is dynamic, achieve the purpose that propulsion and disassembly, and do not need to disconnect process pipe.In addition, between idler wheel and the setting of 1 inner wall of pressure-bearing casing
Gap, so that idler wheel is not contacted with the disengagement of pressure-bearing casing 1 after core packet is installed in place.
As an alternative embodiment, being provided with access-hole plate on inspection manhole 3,1 top of pressure-bearing casing is provided with
Electrical penetration 204.
The rotor coaxial of compressor and motor arrangement, in the case that overall package is in pressure-bearing casing 1, in pressure-bearing casing 1
On, and it is axial positioned at rotor linkage section, setting access-hole plate is light from centre by motor and compressor drum so as to realize
It disconnects.
Meanwhile the present invention also provides a kind of complete machine core pulling methods of integrated form centrifugal compressor, as shown in Figure 2 to 3,
Include the following steps:
S1: being first turned on access-hole plate, and staff enters in pressure-bearing casing 1 from inspection manhole 3, disconnects setting and is compressing
Shaft coupling 4 between machine machine core 102 and motor stator core 202 is specifically exactly to disconnect the compression connected by shaft coupling 4
Arbor head 103 and motor shaft head 205；
S2: it is then turned off the electrical penetration 204 that 1 top of pressure-bearing casing is set；
S3: the motor side end cap 203 of pressure-bearing casing 1 is dismantled later；
S4: finally from the two sides of compressor section casing 101 and motor section casing 201, and using setting in compressor machine core
102 with the idler wheel on motor stator core 202, extract compressor machine core 102 and motor stator core 202 out respectively, checked
And maintenance.
The present invention realizes that two side-pulling of core packet, intermediate two-way inspection manhole 3 realize coaxial cloth by the design of casing L-type end face
The connection and cutting of unit are set, the design sliding friction of core packet idler wheel is converted to rolling friction, reduces installation frictional force, realizes integrated
The compressor and motor core packet of formula compressor are promoted comprehensively from 1 two sides of pressure-bearing casing respectively to be repaired and more with installing and dismantling
It changes.
Compressor core pulling method of the invention, using the thinking of two side core-pullings, i.e. axis is disconnected from intermediate connections, compressor
The method that machine core 102 is extracted out from 1 non-drive side of pressure-bearing casing, motor stator core 202 from 1 driving side of pressure-bearing casing respectively, it is real
Existing unit is easily overhauled and is safeguarded.
Any technical solution disclosed in aforementioned present invention unless otherwise stated, if it discloses numberical range,
Disclosed numberical range is preferred numberical range, and any it should be appreciated by those skilled in the art preferred numberical ranges
The only obvious or representative numerical value of technical effect in many enforceable numerical value.It, can not since numerical value is more
Exhaustion, so the present invention just discloses technical solution of the component values to illustrate the present invention, also, the above-mentioned numerical value enumerated is not
The limitation to the invention protection scope should be constituted.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", "inner",
The orientation or positional relationship of the instructions such as "outside" is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing this hair
Bright and simplified description, rather than the equipment of indication or suggestion meaning or element must have a particular orientation, with specific orientation
Construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of integrated form centrifugal compressor, it is characterised in that: including pressure-bearing casing (1) and be arranged in the pressure-bearing casing
(1) compressor machine core (102) and motor stator core (202) in, the compressor machine core (102) and the motor stator iron
Core (202) is circumferentially provided with idler wheel, wherein
The compressor machine core (102) and the motor stator core (202) are coaxially arranged, shafting by shaft coupling (4) with
Dismountable mode connects, and overall package is interior in the pressure-bearing casing (1), and in the corresponding pressure-bearing casing (1) of linkage section
On be provided with inspection manhole (3), the pressure-bearing casing (1) includes compressor section casing (101) and motor section casing (201), institute
It states compressor section casing (101) and is fixedly connected with the motor section casing (201) by bolt (2).
2. integrated form centrifugal compressor according to claim 1, it is characterised in that: the compressor section casing (101) with
The connecting end surface of the motor section casing (201) is disposed as L-type.
3. integrated form centrifugal compressor according to claim 2, it is characterised in that: be provided on the L-type connecting end surface
Sealing ring.
4. integrated form centrifugal compressor according to claim 1, it is characterised in that: the disconnected end face of the pressure-bearing casing
It is provided with groove (5), the groove (5) being capable of compressor machine core (102) and the motor stator core described in axially position
(202)。
5. integrated form centrifugal compressor according to claim 4, it is characterised in that: it is provided with snap ring in the groove (5),
The snap ring can limit positioning during the unilateral integrated installation of the compressor machine core (102).
6. integrated form centrifugal compressor according to claim 5, it is characterised in that: the snap ring include shearing ring (6) and
Adjustment ring (7).
7. integrated form centrifugal compressor according to claim 1, it is characterised in that: the one of the motor section casing (201)
Side is fixedly installed with motor side end cap (203).
8. integrated form centrifugal compressor according to claim 1, it is characterised in that: the compressor machine core (102) it is non-
End face idler wheel is provided on Driving plane.
9. integrated form centrifugal compressor according to claim 1, it is characterised in that: be provided on the inspection manhole (3)
Access-hole plate, pressure-bearing casing (1) top are provided with electrical penetration (204).
10. a kind of core pulling method of integrated form centrifugal compressor, includes the following steps:
S1: being first turned on access-hole plate, and staff enters in pressure-bearing casing (1) from inspection manhole (3), disconnects setting and is compressing
Shaft coupling (4) between machine machine core (102) and motor stator core (202)；
S2: setting is then turned off in the electrical penetration (204) on pressure-bearing casing (1) top；
S3: the motor side end cap (203) of pressure-bearing casing (1) is dismantled later；
S4: finally from the two sides of compressor section casing (101) and motor section casing (201), and using setting in compressor machine core
(102) with the idler wheel on motor stator core (202), compressor machine core (102) and motor stator core (202) are extracted out respectively,
Carry out inspection and maintenance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910767377.2A CN110360132A (en) | 2019-08-20 | 2019-08-20 | Integrated form centrifugal compressor and its core pulling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910767377.2A CN110360132A (en) | 2019-08-20 | 2019-08-20 | Integrated form centrifugal compressor and its core pulling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110360132A true CN110360132A (en) | 2019-10-22 |
Family
ID=68224104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910767377.2A Pending CN110360132A (en) | 2019-08-20 | 2019-08-20 | Integrated form centrifugal compressor and its core pulling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110360132A (en) |
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| CN208163000U (en) * | 2018-05-11 | 2018-11-30 | 西安陕鼓动力股份有限公司 | A kind of cartridge type disassembling compressor core-pulling device |
| CN108942770A (en) * | 2017-05-26 | 2018-12-07 | 中国电建集团上海能源装备有限公司 | A kind of dismounting tooling of volute pump core packet |
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-
2019
- 2019-08-20 CN CN201910767377.2A patent/CN110360132A/en active Pending
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|---|---|---|---|---|
| CN101410628A (en) * | 2006-03-24 | 2009-04-15 | 西门子公司 | Compressor unit and assembly method |
| US20100290896A1 (en) * | 2006-03-24 | 2010-11-18 | Gerrit Lenderink | Compressor Unit and Assembly Method |
| CN201281047Y (en) * | 2008-10-07 | 2009-07-29 | 沈阳鼓风机集团有限公司 | Casing mounting or dismounting device for barrel compressor |
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