CN107984166B - The abdominal cavity processing method of horizonally split formula centrifugal compressor casing - Google Patents
The abdominal cavity processing method of horizonally split formula centrifugal compressor casing Download PDFInfo
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- CN107984166B CN107984166B CN201711059185.3A CN201711059185A CN107984166B CN 107984166 B CN107984166 B CN 107984166B CN 201711059185 A CN201711059185 A CN 201711059185A CN 107984166 B CN107984166 B CN 107984166B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention discloses the abdominal cavity processing methods of horizonally split formula centrifugal compressor casing, comprising the following steps: the roughing of ring positioning table and partition positioning table is supported in the casing of centrifugal compressor；Stress-removal processing is carried out to the casing after roughing by being heat-treated；Finish-milling processing is carried out to the support ring positioning table in the casing after stress-removal, right boring processing is carried out to the partition positioning table in the casing after stress-removal；Support ring and partition are installed in the casing by the support ring positioning table and partition positioning table；Finish-milling processing is carried out to the support ring and partition being mounted in the casing.The present invention can greatly reduce equipment processing cost and the cost of charp tool, and all be that can carry out promotion and application in the technics institution of casing in the future and Workshop Production.
Description
Technical field
The invention belongs to centrifugal compressor technical fields, and in particular to the abdominal cavity of horizonally split formula centrifugal compressor casing adds
Work method.
Background technique
Horizonally split formula centrifugal compressor has the characteristics of axial admission, radial outlet, is similar to axis stream and adds centrifugal pressure
Contracting machine, but due to the particularity of casing structure, processing technology is but in space state.Due to horizonally split formula centrifugal compressed
The adjuster of machine and the positioning datum of type ring are all leaned on to be guaranteed with the support ring of casing cooperation, and according to existing processing technology,
Device assembly is adjusted in the support ring of parts processing, it is difficult to ensure that the concentricity 0.02mm's that casing is assembled with adjuster wants
It asks, therefore the structure processing of water supply flat cutting fraction centrifugal compressor casing brings unthinkable difficulty, and with existing
Equipment and processing technology are unable to reach design requirement.
Currently, the prior art is by using gantry mill to processing casing abdominal cavity, but numerical control gantry mill equipment price is high
It is expensive, it takes up a large area, highly energy-consuming, production cost is also higher.The casing structure of horizonally split formula centrifugal compressor is complicated simultaneously,
Upper and lower casing abdominal cavity compact dimensions and less than normal, according to previous casing abdominal cavity processing technology, casing abdominal cavity should be in boring and milling two
After end bearing seal area, disassembly turns gantry mill processing casing abdominal cavity, but because of stator workshop gantry mill accessories mill-head size
Greatly, low precision, it is difficult to ensure that the requirement of casing and the concentricity 0.02mm of adjuster assembly, if being processed by previous process experiences
Suitable process equipment can only be found by external coordination or purchases the suitable gantry mill accessory head of size again, just can solve such
The technological difficulties of abdominal cavity processing.
Summary of the invention
For above-mentioned problems of the prior art, the present invention provides the abdomens of horizonally split formula centrifugal compressor casing
Chamber processing method.
In order to achieve the above object, the technical scheme adopted by the invention is as follows:
The abdominal cavity processing method of horizonally split formula centrifugal compressor casing, comprising the following steps:
The roughing of ring positioning table and partition positioning table is supported in the casing of centrifugal compressor；
Stress-removal processing is carried out to the casing after roughing by being heat-treated；
Finish-milling processing is carried out, to the casing after stress-removal to the support ring positioning table in the casing after stress-removal
Interior partition positioning table carries out right boring processing；
Support ring and partition are installed in the casing by the support ring positioning table and partition positioning table；
Finish-milling processing is carried out to the support ring and partition being mounted in the casing.
It further, include: by gantry mill to described to the roughing of the support ring positioning table and partition positioning table
After the casing of centrifugal compressor carries out first time scribing line, carry out rough milling support ring positioning table, Yi Jisuo respectively in the casing
State the intraperitoneal carry out heavy boring partition positioning table of casing, each position needs made allowance in this process, prevent machining deformation and
Eliminate stress deformation.
Further, the first time scribing process is that upper and lower casing horizontal flange processing line is drawn in the casing,
And the lower casing is into and out of air port Flange Plane processing line.
Further, the support ring includes upper and lower support ring, will be described in the processing of the upper and lower support ring
The outer edge of upper and lower support ring is matched with the size of the support ring positioning table in the corresponding upper and lower casing respectively, and
Made allowance at the inner hole formed after the upper and lower support ring splicing.
Further, carrying out finish-milling processing to the support ring positioning table in the casing includes:
By the inner hole of the upper and lower support ring and its split by after the casing centering, by the upper and lower support ring
Outer edge size boring and milling is carried out to the upper and lower casing inside support ring positioning table and partition positioning table；
Carry out reconditioning cleaning by gantry mill to the support ring positioning table and partition positioning table, and in the casing
Assemble support ring；
By the upper and lower casing and the upper and lower support ring by its respective split carry out it is levelling after, it is described it is upper,
Partition positioning table in lower casing installs partition, intraperitoneal between two partitions, by the upper and lower support ring respectively with institute
After stating upper and lower casing compression, and finish-milling is carried out to the split of the upper and lower casing.
Further, the upper and lower casing is pressed and beats surface centering, levelling by split, beats tabular value≤0.04mm.
Further, carrying out right boring processing to the partition positioning table in the casing includes:
The lower casing is subjected to plane centering；
The upper casing is assembled on the lower casing, step includes:
It is inserted into positioning pin on the upper casing, and the position of positioning pin is carried out second on the upper and lower casing
Positioning pin is inserted into it by scribing line, second scribing line after making the upper and lower casing mould assembling, and is inserted completely in the positioning pin
After entering in the casing, just allow to carry out right boring to the casing；
Right boring inner hole and slot and right boring pressure testing face and chamfering at support end seal area on the housing；
On the basis of machined inner hole, table centering is beaten by the centering plane of the lower casing, and lower machine described in right boring
The bearing block of shell requires the bearing block conjunction plane, seam allowance and inner hole up to size conjunction plane, seam allowance and inner hole；
Threaded hole is processed on the circumference of the upper and lower casing, by the support end bearing area end of the lower casing
The oil return hole in face is worked into desired size requirement；
After the positioning plane at lower casing both ends described in finish-milling, the thread mill drilling in the positioning plane；
After lower casing air outlet Flange Plane and seam allowance described in finish-milling, joint hole, ream flat seat are processed；
Behind the support end end face of upper and lower casing and seam allowance described in boring and milling, threaded hole and chamfering are processed on circumference；
Dismantle the upper casing；
It carries out beating table centering in the bearings at both ends seal area and split of the lower casing, franchise is less than 0.02mm.
Further, the step of lower casing progress centering includes: the lower casing by its split, support end bearing
Seal area and centering plane carry out centering, the support end bearing gland of the lower casing are assembled, in the split of the lower casing
Flange side carries out centering plane, and each portion in the support end bearing area of the lower casing carries out right boring inner hole, makes in described
After hole reaches estimated size, support end bearing gland is dismantled.
Further, support ring and partition are installed in the casing by the support ring positioning table and partition positioning table
Installation steps include: that the partition is fixed on to the upper and lower entrance of the casing by the partition positioning table, described
Upper and lower casing processes the pin hole and threaded hole that can mutually fix with the support ring, and the support ring is put into the support ring
After positioning table, fixed pin is squeezed into pin hole, and ensures to fasten, after be screwed into screw, and examine whether screw has withstood fixed pin
Nail, and securely, the dead screw of blunderbuss.
Further, finish-milling processing is carried out to the support ring and partition being mounted in the casing, step includes:
The upper casing is subjected to centering by its horizontal flange, and by the lower casing using inlet and outlet flange as base
Face, wherein the upper and lower casing presses inner hole center centering deviation permission≤0.02mm；
The seam allowance on end face and thrust end inner face in the support end seal area of upper and lower casing described in finish-milling, reaches it
Desired size requirement；
The abdominal cavity of upper and lower casing and support ring inner hole described in finish-milling.
The present invention provides the abdominal cavity processing methods of horizonally split formula centrifugal compressor casing, pass through the machine of centrifugal compressor
Process support ring positioning table and partition positioning table carry out connection seperated with support ring and partition progress in shell, and using boring machine to casing
Inside is processed, and keeps casing centering convenient, and the process tool of boring machine generally uses common brazed carbide turning tool, therefore can be with
The expense for saving cutterhead improves surface roughness, saves process time, reduces processing cost, it may be said that the method
That implements greatly reduces equipment processing cost and the cost of charp tool, in the technics institution of casing in the future and Workshop Production all
It is that can carry out promotion and application.
Detailed description of the invention
Fig. 1 is the stream of the abdominal cavity processing method of the horizonally split formula centrifugal compressor casing of embodiment of the embodiment of the present invention
Cheng Tu.
Specific embodiment
In order to overcome the shortcomings in the prior art, the present invention provides the abdominal cavity processing side of horizonally split formula centrifugal compressor casing
Method.To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the preferred embodiment of the present invention
Figure, technical solution in the embodiment of the present invention are further described in more detail.In the accompanying drawings, same or similar from beginning to end
Label indicates same or similar element or element with the same or similar functions.Described embodiment is the present invention one
Divide embodiment, instead of all the embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to for solving
The present invention is released, and is not considered as limiting the invention.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.It ties below
Attached drawing is closed the embodiment of the present invention is described in detail.
Referring to Fig. 1, the abdominal cavity processing method of horizonally split formula centrifugal compressor casing provided in an embodiment of the present invention, including
Following steps:
S101: the roughing of ring positioning table and partition positioning table is supported in the casing of centrifugal compressor；
S102: stress-removal processing is carried out to the casing after roughing by being heat-treated；
S103: finish-milling processing is carried out, to the machine after stress-removal to the support ring positioning table in the casing after stress-removal
Partition positioning table in shell carries out right boring processing；
S104, support ring and partition are installed in casing by support ring positioning table and partition positioning table；
S105, finish-milling processing is carried out to the support ring and partition being mounted in casing.
Step S101 is discussed in detail.
Roughing to support ring positioning table and partition positioning table include: by gantry mill to the casing of centrifugal compressor into
After row is crossed for the first time, the intraperitoneal carry out heavy boring partition for rough milling support ring positioning table and casing is carried out in casing respectively
Positioning table, each position needs to stay 2mm surplus in this process, prevents machining deformation and eliminates stress deformation.
Wherein, first time scribing process is that upper and lower casing horizontal flange processing line and lower casing are drawn in casing
Into and out of air port Flange Plane processing line.
Support ring includes upper and lower support ring, and in the processing of upper and lower support ring, the outer edge of upper and lower support ring is distinguished
The inner hole for matching with the size of the support ring positioning table in corresponding upper and lower casing, and being formed after the splicing of upper and lower support ring
Stay 3mm surplus in place.
Step S103 is discussed in detail.
Carrying out finish-milling processing to the support ring positioning table in casing includes:
(1), by the inner hole of upper and lower support ring and its split by after casing centering, by the outer edge of upper and lower support ring
Size carries out boring and milling to upper and lower casing inside support ring positioning table and partition positioning table；
(2), the carry out reconditioning cleaning by gantry mill to support ring positioning table and partition positioning table, and assembled in casing
Support ring；
(3), by upper and lower casing and upper and lower support ring by its respective split carry out it is levelling after, in upper and lower casing
Partition positioning table installs partition, intraperitoneal between two partitions, after upper and lower support ring is compressed with upper and lower casing respectively,
And finish-milling is carried out to the split of upper and lower casing.
Wherein, upper and lower casing is pressed and beats surface centering, levelling by split, beats tabular value≤0.04mm.
By boring and milling support ring positioning table, it can guarantee the drawing dimensional tolerance and geometric tolerance of casing, thus assembling
It can accurately guarantee fit-up gap size when support ring and diffuser, and then meet between sealing of the rotor in trial run and run
The gap size of gap and type ring and impeller provides effective guarantee for final operating test run qualification.
Carrying out right boring processing to the partition positioning table in casing includes:
(1) lower casing, is subjected to plane centering；
(2), upper casing is assembled on the lower casing, step includes:
It is inserted into positioning pin on upper casing, and second is carried out to the position of positioning pin on upper and lower casing and is crossed, second
Positioning pin is inserted into it by scribing line after making upper and lower casing mould assembling, and after positioning pin is fully inserted into casing, is just allowed to machine
Shell carries out right boring；
(3), right boring inner hole and slot and right boring pressure testing face and chamfering at the support end seal area on casing；
(4), on the basis of by machined inner hole, table centering, and the axis of right boring lower casing are beaten by the centering plane of lower casing
Seat is held conjunction plane, seam allowance and inner hole, it is required that conjunction plane, seam allowance and inner hole up to size bearing block；
(5), threaded hole is processed on the circumference of upper and lower casing, by returning for the support end bearing area end face of lower casing
Machining of oil hole is required to desired size；
(6), after the positioning plane at finish-milling lower casing both ends, thread mill drilling on the positioning plane；
(7), after finish-milling lower casing air outlet Flange Plane and seam allowance, joint hole, ream flat seat are processed；
(8), after the support end end face of the upper and lower casing of boring and milling and seam allowance, threaded hole and chamfering are processed on circumference；
(9), upper casing is dismantled；
(10), carry out beating table centering in the bearings at both ends seal area and split of lower casing, franchise is less than 0.02mm.
By the partition positioning table size in right boring casing, it can guarantee the drawing dimensional tolerance and geometric tolerance of casing,
Fortune to can accurately guarantee fit-up gap size in assemble in diaphragm, and then when partition works when meeting rotor operation
Row flow and the run stability that can be improved entire rotor reduce unit surge, provide for final operating test run qualification
Effective guarantee.
Wherein, the step of lower casing progress centering includes: lower casing by its split, support end bearing seal area and centering
Plane carries out centering, assembles the support end bearing gland of lower casing, carries out centering plane in the split flange side of lower casing,
Each portion in the support end bearing area of lower casing carries out right boring inner hole, after so that inner hole is reached estimated size, dismantles support end axis
Pressure cap.
Step S104 is discussed in detail.
By the installation steps that support ring positioning table and partition positioning table install support ring and partition in casing include: by
Partition is fixed on the upper and lower entrance of casing by partition positioning table, can mutually fix with support ring in the processing of upper and lower casing
Pin hole and threaded hole squeeze into fixed pin in pin hole after support ring is put into support ring positioning table, and ensure to fasten, after be screwed into
Screw, and examine whether screw has withstood fixing pin, and securely, the dead screw of blunderbuss.
Step S105 is discussed in detail.
Finish-milling processing is carried out to the support ring and partition being mounted in casing, step includes:
(1) upper casing, is subjected to centering by its horizontal flange, and by lower casing using inlet and outlet flange as basal plane,
In, upper and lower casing presses inner hole center centering deviation permission≤0.02mm；
(2), the end face in the support end seal area of the upper and lower casing of finish-milling and the seam allowance on the inner face of thrust end make it up in advance
The requirement of phase size；
(3), the abdominal cavity of the upper and lower casing of finish-milling and support ring inner hole.
In this method, using the partition hole size and support ring hole size processed in casing abdominal cavity, make workpiece
The processing of multiple tracks critical size is completed during clamped one time, to effectively raise the tolerance and size in casing
It is required that.Labor intensity when worker's processing has also been greatly reduced simultaneously, and has increased working efficiency under identical environment, has subtracted
Process time is lacked.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (9)
1. the abdominal cavity processing method of horizonally split formula centrifugal compressor casing, which comprises the following steps:
The roughing of ring positioning table and partition positioning table is supported in the casing of centrifugal compressor；
Stress-removal processing is carried out to the casing after roughing by being heat-treated；
Finish-milling processing is carried out, in the casing after stress-removal to the support ring positioning table in the casing after stress-removal
Partition positioning table carries out right boring processing；
Support ring and partition, the support ring packet are installed in the casing by the support ring positioning table and partition positioning table
Include upper and lower support ring；
Finish-milling processing is carried out to the support ring and partition being mounted in the casing；
Wherein, carrying out finish-milling processing to the support ring positioning table in the casing includes:
By the inner hole of the upper and lower support ring and its split by after the casing centering, by the outer of the upper and lower support ring
Marginal dimension carries out boring and milling to upper and lower casing inside support ring positioning table and partition positioning table；
Carry out reconditioning cleaning by gantry mill to the support ring positioning table and partition positioning table, and assembled in the casing
Support ring；
By the upper and lower casing and the upper and lower support ring by its respective split carry out it is levelling after, in the upper and lower machine
Partition positioning table in shell installs partition, intraperitoneal between two partitions, by the upper and lower support ring respectively with it is described
After upper and lower casing compresses, and finish-milling is carried out to the split of the upper and lower casing.
2. the abdominal cavity processing method of horizonally split formula centrifugal compressor casing according to claim 1, which is characterized in that right
The roughing of the support ring positioning table and partition positioning table includes: to be carried out by casing of the gantry mill to the centrifugal compressor
After crossing for the first time, carries out rough milling support ring positioning table respectively in the casing and the intraperitoneal carry out of the casing is thick
Boring partition positioning table, each position needs made allowance in this process, prevents machining deformation and eliminates stress deformation.
3. the abdominal cavity processing method of horizonally split formula centrifugal compressor casing according to claim 2, which is characterized in that institute
State first time scribing process be drawn in the casing upper and lower casing horizontal flange processing line and the lower casing into and out of
Tuyere flange plane machining line.
4. the abdominal cavity processing method of horizonally split formula centrifugal compressor casing according to claim 1, which is characterized in that
When the processing of the upper and lower support ring, by the outer edge of the upper and lower support ring respectively and in the corresponding upper and lower casing
The size of the support ring positioning table inner hole that matches, and formed after the upper and lower support ring splicing at made allowance.
5. the abdominal cavity processing method of horizonally split formula centrifugal compressor casing according to claim 1, which is characterized in that institute
Upper and lower casing is stated by beating surface centering, it is levelling by split, beat tabular value≤0.04mm.
6. the abdominal cavity processing method of horizonally split formula centrifugal compressor casing according to claim 3, which is characterized in that right
Partition positioning table in the casing carries out right boring processing
The lower casing is subjected to plane centering；
The upper casing is assembled on the lower casing, step includes:
It is inserted into positioning pin on the upper casing, and second is carried out to the position of positioning pin on the upper and lower casing and is crossed,
Positioning pin is inserted into it by second scribing line after making the upper and lower casing mould assembling, and is fully inserted into institute in the positioning pin
After stating in casing, just allow to carry out right boring to the casing；
Right boring inner hole and slot and right boring pressure testing face and chamfering at support end seal area on the housing；
On the basis of machined inner hole, table centering, and lower casing described in right boring are beaten by the centering plane of the lower casing
Bearing block requires the bearing block conjunction plane, seam allowance and inner hole up to size conjunction plane, seam allowance and inner hole；
Threaded hole is processed on the circumference of the upper and lower casing, by the support end bearing area end face of the lower casing
Oil return hole is worked into desired size requirement；
After the positioning plane at lower casing both ends described in finish-milling, the thread mill drilling in the positioning plane；
After lower casing air outlet Flange Plane and seam allowance described in finish-milling, joint hole, ream flat seat are processed；
Behind the support end end face of upper and lower casing and seam allowance described in boring and milling, threaded hole and chamfering are processed on circumference；
Dismantle the upper casing；
It carries out beating table centering in the bearings at both ends seal area and split of the lower casing, franchise is less than 0.02mm.
7. the abdominal cavity processing method of horizonally split formula centrifugal compressor casing according to claim 6, which is characterized in that institute
State the step of lower casing carries out centering include: the lower casing by its split, support end bearing seal area and centering plane into
Row centering assembles the support end bearing gland of the lower casing, and it is flat to carry out centering in the split flange side of the lower casing
Face, each portion in the support end bearing area of the lower casing carry out right boring inner hole and tear open after so that the inner hole is reached estimated size
Unload support end bearing gland.
8. the abdominal cavity processing method of horizonally split formula centrifugal compressor casing according to claim 1, which is characterized in that logical
Crossing the support ring positioning table and partition positioning table and installing support ring and the installation steps of partition in the casing includes: by institute
State the upper and lower entrance that partition is fixed on the casing by the partition positioning table, the upper and lower casing processing can be with
The pin hole and threaded hole that the support ring is mutually fixed make fixed pin after the support ring is put into the support ring positioning table
Enter in pin hole, and ensure to fasten, after be screwed into screw, and examine screw whether to withstand fixing pin, and securely, the dead spiral shell of blunderbuss
Nail.
9. the abdominal cavity processing method of horizonally split formula centrifugal compressor casing according to claim 1, which is characterized in that right
The support ring and partition being mounted in the casing carry out finish-milling processing, and step includes:
The upper casing is subjected to centering by its horizontal flange, and by the lower casing using inlet and outlet flange as basal plane,
In, the upper and lower casing presses inner hole center centering deviation permission≤0.02mm；
The seam allowance on end face and thrust end inner face in the support end seal area of upper and lower casing described in finish-milling makes it up to expection
Size requirement；
The abdominal cavity of upper and lower casing and support ring inner hole described in finish-milling.
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| CN108971540A (en) * | 2018-08-20 | 2018-12-11 | 沈阳透平机械股份有限公司 | The processing method of cutter and the special stator blade mounting hole nest of central casing |
| CN110026741B (en) * | 2019-04-25 | 2021-06-22 | 沈阳透平机械股份有限公司 | Rough machining method for centrifugal compressor shell |
| CN110102970B (en) * | 2019-04-25 | 2020-12-29 | 沈阳透平机械股份有限公司 | Method for processing centrifugal compressor partition plate |
| CN111112963B (en) * | 2020-03-05 | 2021-12-24 | 招商局邮轮制造有限公司 | Machining method for self-elevating multifunctional service platform floating type gear box |
| CN114233689B (en) * | 2021-12-20 | 2023-06-30 | 沈阳透平机械股份有限公司 | Alignment method for horizontal split large compressor shell and partition plate |
| CN114799755B (en) * | 2022-04-29 | 2023-08-04 | 沈阳透平机械股份有限公司 | Method for machining abdominal cavity of horizontal split compressor shell by boring machine |
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| CN104924042A (en) * | 2015-06-23 | 2015-09-23 | 天津第一机床总厂 | Large gear machine tool drum wheel assembled piece machining method |
| CN105729072B (en) * | 2016-04-29 | 2017-10-17 | 沈阳透平机械股份有限公司 | The processing method of overweight ultra-large type compressor case |
| CN206144852U (en) * | 2016-10-28 | 2017-05-03 | 沈阳透平机械股份有限公司 | Water under high pressure flat cutting divides centrifugal compressor casing |
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