CN108916118A - A kind of improved method of nitrogen oxide gas compressor mid-separate surface seal - Google Patents
A kind of improved method of nitrogen oxide gas compressor mid-separate surface seal Download PDFInfo
- Publication number
- CN108916118A CN108916118A CN201810682869.7A CN201810682869A CN108916118A CN 108916118 A CN108916118 A CN 108916118A CN 201810682869 A CN201810682869 A CN 201810682869A CN 108916118 A CN108916118 A CN 108916118A
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- CN
- China
- Prior art keywords
- split
- lower cylinder
- cylinder cap
- nitrogen oxide
- gas compressor
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- 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.)
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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
- F04D29/60—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
-
- 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
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
-
- 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
- F04D29/08—Sealings
- F04D29/083—Sealings especially adapted for elastic fluid pumps
-
- 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
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
Abstract
The invention discloses a kind of improved methods of nitrogen oxide gas compressor mid-separate surface seal, include the following steps：Step 1：Decouple nitrogen oxide gas compressor upper cylinder cover and lower cylinder cap；Step 2：The split of upper cylinder cover and lower cylinder cap is cleared up respectively, and sanding and polishing is carried out to split；Step 3：The adhesive seal gasket on the inside of lower cylinder cap split, and the gasket is made to form a closed-loop；Step 4：Stop-leak compound is smeared at bolt in lower cylinder cap split；Step 5：Restore upper cylinder cover to connect with lower cylinder cap；The present invention is able to solve the problem of four-in-one unit nitrogen oxide gas compressor split leakage, while using effect is good, easy to implement simple.
Description
Technical field
The invention belongs to mechanical equipment Maintenance and Repair field, concretely relate to external import centrifugal compressor
The technological improvement of maintenance mode reaches energy normal use with this, does not influence Environmental Safety requirement, it is ensured that centrifugal compressor is stable
Cover with excellent safe operation.
Background technique
Energy conservation technological transformation key core equipment four-in-one compressor set in Sichuan Lutianhua Co., Ltd.'s nitric acid workshop is selected
German Man-turbo Products, the said firm provide at least 350 nitric acid plant four-in-one compressor sets so far for the whole world,
Popularity and good reputation with higher.
Nitric acid workshop four-in-one unit is transferred to running-in period in the whole installment works of completion on July 5th, 2009, unit,
Only i.e. discovery nitrogen oxide gas compressor split inlet plenum and exhaust chamber centre engaging portion leaks oxygen to unit trial run and run after 2 days
Change nitrogen, the during which repeated multiple times improvement for carrying out sealant and on probation, but effect is not satisfactory always, as compressor is transported
The variation of row time and operation operating condition, the number that discontinuity leakage pickle occurs for split is continuously increased, to guarantee four-in-one
The safe and environment-friendly, continuous operation of unit energy, it is extremely urgent to solve the leakage of four-in-one unit nitrogen oxide gas compressor split, it is necessary to thorough
Bottom solves.
Summary of the invention
Therefore, to overcome above-mentioned deficiency, the present invention provides in a kind of solution four-in-one unit nitrogen oxide gas compressor point herein
The method of face leakage problem；
The improved method that this method is achieved in that a kind of nitrogen oxide gas compressor mid-separate surface seal, includes the following steps：
Step 1：Decouple nitrogen oxide gas compressor upper cylinder cover and lower cylinder cap；
Step 2：The split of upper cylinder cover and lower cylinder cap is cleared up respectively, and sanding and polishing is carried out to split；
Step 3：Band-like gasket seal is pasted on the inside of lower cylinder cap split, and the gasket is made to form a closed-loop；
Step 4：Stop-leak compound is smeared at bolt in lower cylinder cap split, and is made stop-leak compound thickness uniformly and surrounded an envelope
Closed loop；
Step 5：Restore upper cylinder cover to connect with lower cylinder cap, torque fastens each connection bolt as required.
Preferably, the step 1 includes the following steps：
1）32 M72 bolts and 10 M48 bolts are dismantled respectively with dedicated torque spanner；
2）Upper cylinder cover and lower cylinder cap are decomposed with dedicated jackscrew, hangs and removes upper cylinder cover.
Preferably, the step 2 is cleared up using 1# emery cloth, and uses 260# abrasive paper for metallograph sanding and polishing.
Preferably, band-like gasket seal 30mm wide 1mm is thick in the step 3, and uses GORE expanded PTFE
It is made.
Preferably, stop-leak compound 4 uses Guo electricity Futong MFZ-3 type steam turbine stop-leak compound in the step 4.
Preferably, tools for bolts ' pretension force request is as follows in the step 5：M72 bolt torque is 35 mm, M48 bolt torque
For 15 mm.
The W. L. Gore & Associates, Inc. company GORE expanded PTFE industry sealed product is by 100% GORE-TEX varicosity four
Fluorine is made, and distinguished GORE expanded PTFE sealed product is that it has the polytetrafluoroethylbulked bulked one kind that becomes by force
Tough and porous new material, its high fiber, this new material not only maintain the unique brilliance of polytetrafluoroethylene (PTFE) itself
The splendid chemical stability of performance-, extremely low coefficient of friction, wide operation temperature, will not aging, and it is quite tough and tensile,
Reduce creep and cold flow.
Varicosity tetrafluoro is a kind of sealing material for the very Unique being fabricated using unique processing technology.It is swollen
Body tetrafluoro is a kind of continuous band-shaped pure polytetrafluoroethylproducts products of white, has good flexibility, compression resilience, creep resistance
Property, resistant of high or low temperature and excellent corrosion resistance, not aging, self-lubrication.Sealing performance is brilliant, installs and uses extremely square
It just, is the very good sealing material of the industries such as chemical industry, medicine, petrochemical industry, food and drink, electronics, electric power, metallurgy, ship.
The GORE expanded PTFE technical parameter and purposes are as follows
A) temperature -268~+316 DEG C are used.
B) 20 MPa of pressure <, all chemical substances of Applicable media in addition to element fluorine, molten alkali metal are used.
C) 0.6~0.8 g/cm of density3, purposes：Various enamel linings, glass lining, plastic lining, rubber lining,
The sealing of the flange faces such as graphite lining and stainless steel, the tower of titanium steel, heat exchanger, reaction kettle.
D) flange face sealing of various pipelines and pipe fitting.
E) surface processing accuracy is poor, and out-of-flatness region is larger, in irregular shape, the not easy-to-use foot or unsuitable of bolt clipping forcee
The flange face sealing of excessive heavy caliber equipment.
F) strong corrosive medium and the sealing for being unable to contaminanted fluid.
The GORE expanded PTFE superiority is as follows
A) sealing performance is brilliant.Compressibility with height, it is easy to fill up the cavity on sealing surface and groove, block interface
Leakage, and the characteristic for thering is rebound to expand when being under tension, therefore interior media pressure is higher, sealing force is bigger, this is
Its most magical characteristic.
B) convenient to use.The varicosity polytetrafluoroethylsealing sealing tape of length needed for one section of clip, as long as two ends intersection is mutually changed,
It may make up the sealing ring of an arbitrary dimension, arbitrary shape.The adhesive tape being attached in band one side can be such that band fixes
On equipment sealing surface, facilitate installation, then only needing little bolt clipping forcee, (minimum pretightning force is 50Kgf/cm2 )
Sealing well can be formed.
C) durable.Polytetrafluoroethylene (PTFE) has optimal corrosion resistance, not aging, by special processing admittedly up to close
Band is sealed, and has been assigned good creep resistant and can the performance that uses of long-term safety within the scope of very wide temperature.
D) clean.Varicosity tetrafluoro be white polytetrafluoroethylpipe product, because it will not be corroded, will not aging, therefore
Contacted fluid will not be polluted because falling off.
E) knot Ji is worthwhile.It mutually changes as long as band both ends intersect, that is, may make up the sealing ring of an a certain specification, it is absolutely not unrestrained
Take；Band can be fully filled irregular sealing surface, can lower the machining accuracy of sealing surface, and make some because sealing surface becomes rusty
The accessory and equipment lose, wash away, worn is come back to life；In addition because of its long service life, maintenance frequency, more aobvious its is economical
The Guo electricity Futong MFZ-3 type steam turbine stop-leak compound application range is as follows：
1, applied to the sealing of the cylinder caps faying face such as steam turbine, gas turbine and lubrication 2, be applied to compressor, steam engine, thoroughly
The sealing and lubrication at the sealing of flat machine cylinder end face and lubrication 3, the at high temperature under high pressure positions such as contact acid, alkali, steam
4, high temperature hot stove pipe flange face, the refractory seals 5 of oil gas field deep-well drill tool, especially suitable for overcritical and super
The permanent seal of the steam turbine faying face of overcritical capacity thermal power generation unit
Therefore, understood according to the performance to the above sealing material, the band-like gasket seal of GORE expanded PTFE and state's electricity are rich
Logical MFZ-3 type steam turbine stop-leak compound meets four-in-one unit nitrogen oxide gas compressor mid-separate surface seal requirement, energy of the present invention
It enough solves the problems, such as to solve the leakage of four-in-one unit nitrogen oxide gas compressor split, and using effect is good, cost is moderate, is suitble to
It promotes the use of.
Detailed description of the invention
Fig. 1 is the improved schematic diagram of nitrogen oxide gas compressor lower cylinder body mid-separate surface seal structure type；
Fig. 2 is the partial enlargement diagram of M in Fig. 1；
In figure：1, M72 bolt；2, M48 bolt；3, gasket seal；4, stop-leak compound；5, lower cylinder body.
Specific embodiment
In the following, specific embodiments of the present invention are discussed in detail in conjunction with attached drawing, the present invention is carried out into one in combination with diagram
Walk installation instructions.
1, attached drawing is the improved schematic diagram of nitrogen oxide gas compressor lower cylinder body mid-separate surface seal structure type, by edge as shown in the figure
GORE expanded PTFE item is pasted in heavy black region, and makes sure to keep in mind to notice that 15~20mm of overlapping should be kept by taking notch；Grid lines
Guo electricity Futong MFZ-3 type steam turbine stop-leak compound 4 is all uniformly smeared in region, until entire lower cylinder body plane all standing.
2, lifting resets upper cylinder cover, returns the whole splits of dress and connects bolt.
3, split connects bolt fastening step
A) nut of all split bolts is tightened by hand to upper cylinder body end face and is contacted.
B) with fork spanner fit power from split middle bolt fastening along both sides by the fastening of the nuts of all split bolts in place, with
1 people's Tightening moment is advisable, and keeps first pretightning force uniform.
C) torque spanner is used（Two）Split nut is symmetrically fastened in place from split middle bolt fastening sequence along both sides, it is cold
The requirement of state pre-fastening moment：M72 bolt 900Nm, M48 bolt 480Nm makes split bolt generate cold conditions pretightning force, promotes to seal
Uniformly distributed stress.
D) fastening bolt, the tight bolt requirement of heat are evenly heated by split bolt fastening sequence with two groups of electric heating rods：M72
Nut after split bolt electric heating elongation, is screwed onto predetermined angular (or arc by 35 mm of bolt torque, 15 mm of M48 bolt torque
It is long).
E) the heat tight split bolt deadline, it is solid should to be strict controlled in Guo electricity Futong MFZ-3 type steam turbine stop-leak compound
Change time range（The Guo electricity Futong MFZ-3 type steam turbine stop-leak compound solidification unsticking time is 15 ~ 30 minutes）.
Claims (6)
1. a kind of improved method of nitrogen oxide gas compressor mid-separate surface seal, which is characterized in that include the following steps：
Step 1：Decouple nitrogen oxide gas compressor upper cylinder cover and lower cylinder cap（5）；
Step 2：Upper cylinder cover and lower cylinder cap are cleared up respectively（5）Split, and to split carry out sanding and polishing；
Step 3：Band-like gasket seal is pasted on the inside of lower cylinder cap split（3）, and the gasket is made to form a closed-loop；
Step 4：Stop-leak compound is smeared at bolt in lower cylinder cap split（4）, and make stop-leak compound（4）Thickness is uniform and surrounds
One closed-loop；
Step 5：Restore upper cylinder cover to connect with lower cylinder cap, torque fastens each connection bolt as required.
2. the method according to claim 1, wherein the step 1 includes the following steps：
32 M72 bolts are dismantled respectively with dedicated torque spanner（1）And 10 M48 bolts（2）；
Upper cylinder cover and lower cylinder cap are decomposed with dedicated jackscrew, hangs and removes upper cylinder cover.
3. the method according to claim 1, wherein the step 2 is cleared up using 1# emery cloth, and using 260#
Abrasive paper for metallograph sanding and polishing.
4. the method according to claim 1, wherein band-like gasket seal 30mm wide 1mm is thick in the step 3,
And it is made of GORE expanded PTFE.
5. the method according to claim 1, wherein stop-leak compound in the step 4（4）Using Guo electricity Futong
MFZ-3 type steam turbine stop-leak compound.
6. the method according to claim 1, wherein tools for bolts ' pretension force request is as follows in the step 5：M72 spiral shell
Bolt（1）Torque is 35 mm, M48 bolt（2）Torque is 15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810682869.7A CN108916118A (en) | 2018-06-28 | 2018-06-28 | A kind of improved method of nitrogen oxide gas compressor mid-separate surface seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810682869.7A CN108916118A (en) | 2018-06-28 | 2018-06-28 | A kind of improved method of nitrogen oxide gas compressor mid-separate surface seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108916118A true CN108916118A (en) | 2018-11-30 |
Family
ID=64422959
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810682869.7A Pending CN108916118A (en) | 2018-06-28 | 2018-06-28 | A kind of improved method of nitrogen oxide gas compressor mid-separate surface seal |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201763569U (en) * | 2010-06-13 | 2011-03-16 | 河南省煤气(集团)有限责任公司义马气化厂 | Splitting surface milling flute gas-leakage prevention device of oxygen compressor |
| CN102322299A (en) * | 2011-08-25 | 2012-01-18 | 上海电气电站设备有限公司 | Sealing structure and sealing method of casing split |
| CN103343705A (en) * | 2013-07-19 | 2013-10-09 | 东方电气集团东方汽轮机有限公司 | Method for sealing middle-split surface of steam turbine and sealing structure |
| CN206608547U (en) * | 2017-01-21 | 2017-11-03 | 青岛福荣华鑫环保能源科技有限公司 | Contact is to a point oil sealing |
-
2018
- 2018-06-28 CN CN201810682869.7A patent/CN108916118A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201763569U (en) * | 2010-06-13 | 2011-03-16 | 河南省煤气(集团)有限责任公司义马气化厂 | Splitting surface milling flute gas-leakage prevention device of oxygen compressor |
| CN102322299A (en) * | 2011-08-25 | 2012-01-18 | 上海电气电站设备有限公司 | Sealing structure and sealing method of casing split |
| CN103343705A (en) * | 2013-07-19 | 2013-10-09 | 东方电气集团东方汽轮机有限公司 | Method for sealing middle-split surface of steam turbine and sealing structure |
| CN206608547U (en) * | 2017-01-21 | 2017-11-03 | 青岛福荣华鑫环保能源科技有限公司 | Contact is to a point oil sealing |
Non-Patent Citations (2)
| Title |
|---|
| 杨花，贺艳玲，郭小红: "国产"四合一"机组氧化氮压缩机特点分析", 《中国新技术新产品》 * |
| 黄雪梅: "《化工科技成果汇编》", 31 December 1987 * |
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Application publication date: 20181130 |