CN111998009A - Gear coupling of main oil pump of steam turbine set and modification method thereof - Google Patents
Gear coupling of main oil pump of steam turbine set and modification method thereof Download PDFInfo
- Publication number
- CN111998009A CN111998009A CN202010968221.3A CN202010968221A CN111998009A CN 111998009 A CN111998009 A CN 111998009A CN 202010968221 A CN202010968221 A CN 202010968221A CN 111998009 A CN111998009 A CN 111998009A
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- Prior art keywords
- oil
- sleeve
- scraper ring
- tooth
- coupling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/02—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like
- F16D1/033—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like by clamping together two faces perpendicular to the axis of rotation, e.g. with bolted flanges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N1/00—Constructional modifications of parts of machines or apparatus for the purpose of lubrication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N21/00—Conduits; Junctions; Fittings for lubrication apertures
- F16N21/04—Nozzles for connection of lubricating equipment to nipples
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Pumps (AREA)
Abstract
The invention provides a gear coupling of a main oil pump of a turboset and a transformation method thereof. The invention has simple structure, the lubricating oil is directly sprayed on the meshing teeth, the lubricating oil path is shortened, the lubricating effect is improved, the service life of the tooth-shaped coupling is prolonged, and the tooth-shaped coupling can operate for a long time. The method comprises the following steps: the original oil scraper ring is removed, the flat plate is used for manufacturing the oil scraper ring again, the oil scraper ring is connected with the inner gear sleeve at the position of the original oil scraper ring, a gap is formed between the newly manufactured oil scraper ring and the outer gear sleeve, the original oil channel and the sewage discharge hole are blocked, and the disc surface of the second shaft sleeve is provided with the sewage discharge hole.
Description
Technical Field
The invention relates to a tooth-shaped coupling.
Background
The gear coupling structure that the steam turbine unit main oil pump of thermal power plant adopted is shown in figure 1, this gear coupling includes external tooth axle sleeve 1a, with the internal tooth cover 2a of external tooth axle sleeve 1a meshing, second axle sleeve 3a of being connected through bolt 5a and internal tooth cover 2a, the oil passageway 101a that is equipped with on the external tooth axle sleeve 1a with running through, still be equipped with oil scraper ring 4a on the external tooth axle sleeve 1a, oil scraper ring 4a outer lane and internal tooth cover 2a contact, be equipped with dirty oil passageway 6a between oil scraper ring 4a and the internal tooth cover 2a, be equipped with on the internal tooth cover 2a with dirty oil passageway 201a that communicates 6 a. When the lubricating oil pump is used, an oil spraying pipe 10a of the lubricating oil pump is arranged at one end of the oil channel 101a, lubricating oil flows into a gap between the external gear sleeve 1a and the second shaft sleeve 3a from the oil channel 101a, then flows onto meshing teeth of the external gear sleeve 1a and the internal gear sleeve 2a in a folded mode, and then is discharged through the dirty oil channel 6a and the sewage channel 201 a. However, in the actual use process of the tooth-shaped coupler, the lubricating effect is poor due to the fact that the lubricating oil way is too long, the defects of meshing teeth often occur, the actual service life of the coupler is far short of the design life of 30 years, the problems of jamming and locking of the coupler, burning of a thrust bearing bush and swinging of a unit speed regulating system are further caused, and the accident risk is increased. In addition, when the external gear sleeve 1a rotates until the oil passage 101a is misaligned with the oil jet pipe 10a, the lubricating oil is splashed, which causes waste and pollution to equipment and sites.
Chinese patent publication No. CN103016556A discloses a lubricating structure for a vertical crowned tooth coupling, which includes an inner gear sleeve, an upper gear shaft and a lower gear shaft engaged with the inner gear sleeve, an overflow hole is provided on a circular boss in the middle of the inner gear sleeve, the overflow hole is communicated with the engaged gear gap of the upper gear shaft and the lower gear shaft, a ring sleeve is further provided on the lower portion of the inner gear sleeve, an outer ring is further provided on the lower gear shaft, and the ring sleeve and the outer ring are sealed and matched and enclose into an oil collecting cavity communicated with the gear gap of the lower gear shaft. According to the vertical crowned tooth shaft coupling lubricating structure, lubricating oil is collected at the upper end of the inner gear sleeve to lubricate the meshing teeth of the upper gear shaft, the lubricating oil flows out through the overflow holes to lubricate the meshing teeth of the lower gear shaft, the lubricating oil is accumulated in an oil collecting cavity defined by the gear sleeve and the outer ring, and the meshing teeth of the upper gear shaft and the lower gear shaft are soaked in the lubricating oil along with the rising of the oil surface, so that each tooth is fully lubricated. The vertical crown gear coupling requires that a connected shaft is a gear shaft, the problem of splashing of a lubricating oil inlet at the end part cannot be solved, and in addition, the lubricating structure cannot timely discharge polluted and deteriorated lubricating oil, the lubricating oil needs to be periodically disassembled and replaced, and the vertical crown gear coupling is not suitable for long-term operation.
Disclosure of Invention
In order to solve the technical problems, the invention provides a gear coupling of a main oil pump of a steam turbine set and a transformation method of the gear coupling of the main oil pump of the steam turbine set.
The invention is realized by the following technical scheme.
The invention provides a gear coupling of a main oil pump of a steam turbine unit, which comprises an outer gear shaft sleeve, an inner gear sleeve and a second shaft sleeve, wherein the outer gear shaft sleeve is meshed with the inner gear sleeve, the inner gear sleeve is connected with the second shaft sleeve through a bolt, an oil retainer ring is arranged on the inner gear sleeve, a gap is formed between the oil retainer ring and the outer gear shaft sleeve, a sewage discharge channel is formed in the second shaft sleeve, and the sewage discharge channel is communicated with a cavity between the outer gear shaft sleeve and the second shaft sleeve.
The oil injection pipe is arranged on a gap between the oil retainer ring and the external tooth shaft sleeve, and the lubricating oil is directly injected to the meshing teeth between the external tooth shaft sleeve and the internal tooth sleeve, so that the lubricating oil path is obviously shortened, the lubricating effect is improved, and the service life of the tooth-shaped coupling is prolonged. The invention can also adopt pressure oil supply for lubrication, the lubricating oil sprays impurities on the meshing teeth out and is discharged in time through the sewage discharge channel, the cleanness of the lubricating oil is kept, the lubricating oil is prevented from being replaced by a dismounting device, and the coupler can run for a long time.
The communication position of the sewage channel and the cavity is positioned on the outer annular surface of the cavity. When the second shaft sleeve rotates to the position below the sewage discharge channel, dirty oil in the oil cavity can be discharged completely in time. Further, the diameter of the sewage discharge channel is 3-4 mm. Further, the sewage discharge channel is 2-4 evenly distributed along the circumference
And the end face of the inner gear sleeve is provided with a limiting step, and the limiting step is contacted with the oil retaining ring. The anti-stopper oil moves toward the meshing teeth. Furthermore, an end cover is arranged on the end face of the oil slinger, and the end cover is detachably connected to the inner gear sleeve. The end cover and the inner gear sleeve are preferably in threaded connection or screw connection, and the oil retainer ring can be prevented from falling off by the end cover. Furthermore, the oil scraper ring is provided with an external thread which is connected with the internal gear sleeve. Compared with interference fit or welding, the oil scraper ring is convenient to detach and replace.
The thickness of the oil scraper ring is 3-4 mm.
The invention also provides a method for transforming the gear coupling of the main oil pump of the steam turbine set, the gear coupling of the main oil pump of the steam turbine set comprises an external gear shaft sleeve, an internal gear sleeve engaged with the external gear shaft sleeve, and a second shaft sleeve connected with the internal gear sleeve through a bolt, wherein an oil channel is arranged on the external gear shaft sleeve in a penetrating way, an oil retainer is also arranged on the external gear shaft sleeve, the outer ring of the oil retainer is contacted with the internal gear sleeve, a dirty oil channel is arranged between the oil retainer and the internal gear sleeve, and a sewage discharge hole communicated with the dirty oil channel is arranged on the internal gear sleeve, the method comprises the following steps: the original oil scraper ring is removed, the flat plate is used for manufacturing the oil scraper ring again, the oil scraper ring is connected with the inner gear sleeve at the position of the original oil scraper ring, a gap is formed between the newly manufactured oil scraper ring and the outer gear shaft sleeve, the original oil channel and the sewage discharge hole are blocked, and the disc surface of the second shaft sleeve is provided with the sewage discharge hole.
The single-piece cost of the tooth-shaped coupling is about 15 ten thousand yuan, the average cost of the tooth-shaped coupling in service after depreciation is about 10 ten thousand yuan, and if the tooth-shaped coupling is completely replaced, great economic loss can be caused. By adopting the method for transforming the tooth-shaped coupler of the main oil pump of the steam turbine unit, the processing cost of a single coupler is within 1 ten thousand yuan, the service life of the coupler is prolonged, 9 ten thousand yuan can be saved by transforming each coupler, and if thermal power plants adopting the series of oil injection pump couplers of the steam turbine in China are transformed by adopting the method provided by the invention, the service life of the coupler can be prolonged, the accident risk is reduced, and huge economic benefits can be generated.
Furthermore, the original oil channel and the original sewage draining hole are plugged by a conical plug head from the inner side into the oil channel and the sewage draining hole, and then the edge of the conical plug head is sealed and welded. The sealing welding is carried out after the blockage, so that the strength of the external tooth shaft sleeve and the internal tooth sleeve is guaranteed, and the sealing effect of the blockage is enhanced.
The invention has the beneficial effects that:
in conclusion, the invention has simple structure and easy assembly and modification, improves the lubricating effect of the tooth-shaped coupler of the main oil pump of the steam turbine unit, prolongs the service life of the coupler, can also keep the fluidity of lubricating oil, timely removes dirty oil and impurities carried by the dirty oil, avoids disassembling the device for replacing the lubricating oil, and can operate for a long time. When the damage degree of the meshing teeth of the coupler is small and the residual service life is long, by adopting the method provided by the invention, the cost can be averagely saved by 9 ten thousand yuan and the economic benefit is large when 1 series of tooth-shaped couplers are transformed.
Drawings
FIG. 1 is a schematic structural view of a conventional gear coupling for a main oil pump of a steam turbine set;
fig. 2 is a schematic structural diagram of the present invention.
In the figure: 1-external tooth shaft sleeve; 2-inner gear sleeve; 201-step surface; 3-a second shaft sleeve; 301-a trapway; 4-oil slinger; 5-bolt; 6-a gap; 7-end cap; 10-an oil spray pipe; 1 a-external gear shaft sleeve; 101 a-an oil channel; 2 a-an inner gear sleeve; 201 a-a blowdown port; 3 a-a second bushing; 4 a-oil deflector ring; 5 a-bolt; 6 a-dirty oil channel; 10 a-oil spray pipe.
Detailed Description
The technical solutions of the present invention are further described below, but the scope of the claims is not limited thereto.
Fig. 2 is a schematic structural diagram of the present invention:
the invention provides a gear coupling of a main oil pump of a steam turbine unit, which comprises an external gear shaft sleeve 1, an internal gear sleeve 2 and a second shaft sleeve 3, wherein the external gear shaft sleeve 1 is meshed with the internal gear sleeve 2, the internal gear sleeve 2 is connected with the second shaft sleeve 3 through a bolt 5, an oil retainer 4 is arranged on the internal gear sleeve 2, a gap 6 is arranged between the oil retainer 4 and the external gear shaft sleeve 1, a sewage discharge channel 301 is arranged on the second shaft sleeve 3, and the sewage discharge channel 301 is communicated with a cavity between the external gear shaft sleeve 1 and the second shaft sleeve 3.
The invention has simple structure, when in use, the oil injection pipe 10 is arranged on the gap 6 between the oil retainer 4 and the external tooth shaft sleeve 1, and the lubricating oil is directly injected to the meshing teeth between the external tooth shaft sleeve 1 and the internal tooth sleeve 2, thereby obviously shortening the lubricating oil path, improving the lubricating effect and prolonging the service life of the tooth-shaped coupling. The invention can also adopt pressure oil supply for lubrication, the lubricating oil sprays out impurities on the meshing teeth and is discharged in time through the sewage discharge channel 301, the cleanness of the lubricating oil is kept, the lubricating oil is prevented from being replaced by a dismounting device, and the coupler can run for a long time.
The communication position of the sewage channel 301 and the cavity is positioned on the outer annular surface of the cavity. When the second shaft sleeve 3 rotates to the position below the sewage channel 301, dirty oil in the oil cavity can be thoroughly discharged in time. Further, the diameter of the sewage draining channel 301 is 3-4 mm. Further, the sewage draining channels 301 are 2-4 uniformly distributed along the circumference
The end face of the inner gear sleeve 2 is provided with a limiting step which is in contact with the oil retainer 4. The slinger 4 is prevented from moving toward the meshing teeth. Furthermore, an end cover 7 is further arranged on the end face of the oil slinger 4, and the end cover 7 is detachably connected to the inner gear sleeve 2. The end cover 7 and the inner gear sleeve 2 are preferably in threaded connection or screwed connection, and the oil retainer ring 4 can be prevented from falling off by the end cover 7. Further, the oil slinger 4 is provided with external threads which are connected with the internal gear sleeve 2. Compared with interference fit or welding, the oil scraper ring 4 is convenient to detach and replace.
The thickness of the oil scraper ring 4 is 3-4 mm.
The invention also provides a method for transforming the tooth-shaped coupler of the main oil pump of the turboset, which comprises the following steps:
as shown in fig. 1, the structure schematic diagram of the gear coupling for the main oil pump of the steam turbine set includes an external gear sleeve 1a, an internal gear sleeve 2a engaged with the external gear sleeve 1a, a second shaft sleeve 3a connected with the internal gear sleeve 2a through a bolt 5a, an oil channel 101a penetratingly arranged on the external gear sleeve 1a, an oil slinger 4a further arranged on the external gear sleeve 1a, an outer ring of the oil slinger 4a contacting with the internal gear sleeve 2a, a dirty oil channel 6a arranged between the oil slinger 4a and the internal gear sleeve 2a, and a sewage hole 201a arranged on the internal gear sleeve 2a and communicated with the dirty oil channel 6a, the method includes: the original oil retainer ring 4a is removed, the flat plate is used for manufacturing the oil retainer ring 4 again, the oil retainer ring 4 is connected with the inner gear sleeve 2a at the position of the original oil retainer ring 4a, a gap 6 is formed between the newly manufactured oil retainer ring 4 and the outer gear shaft sleeve 1a, the original oil channel 101a and the sewage hole 201a are blocked, and the sewage channel 301 is arranged on the disc surface of the second shaft sleeve 3 a.
The single-piece cost of the tooth-shaped coupling is about 15 ten thousand yuan, the average cost of the tooth-shaped coupling in service after depreciation is about 10 ten thousand yuan, and if the tooth-shaped coupling is completely replaced, great economic loss can be caused. By adopting the method for transforming the tooth-shaped coupler of the main oil pump of the steam turbine unit, the processing cost of a single coupler is within 1 ten thousand yuan, the service life of the coupler is prolonged, 9 ten thousand yuan can be saved by transforming each coupler, and if thermal power plants adopting the series of oil injection pump couplers of the steam turbine in China are transformed by adopting the method provided by the invention, the service life of the coupler can be prolonged, the accident risk is reduced, and huge economic benefits can be generated.
Furthermore, the original oil channel 101a and the sewage draining hole 201a are plugged by a conical plug from the inner side into the oil channel 101a and the sewage draining hole 201a, and then are sealed and welded along the edge of the conical plug. The sealing welding is carried out after the blockage, so that the strength of the external tooth shaft sleeve 1a and the internal tooth sleeve 2a is guaranteed, and the sealing effect of the blockage is enhanced.
Claims (10)
1. The utility model provides a steam turbine unit main oil pump tooth profile coupling, includes external tooth axle sleeve (1), interior tooth cover (2), second axle sleeve (3), external tooth axle sleeve (1) and interior tooth cover (2) meshing are connected its characterized in that through bolt (5) between interior tooth cover (2) and second axle sleeve (3): the oil scraper ring (4) is arranged on the inner gear sleeve (2), a gap (6) is formed between the oil scraper ring (4) and the outer gear shaft sleeve (1), a sewage discharge channel (301) is formed in the second shaft sleeve (3), and the sewage discharge channel (301) is communicated with a cavity between the outer gear shaft sleeve (1) and the second shaft sleeve (3).
2. The turboset main oil pump tooth coupling of claim 1, wherein: the communication position of the sewage channel (301) and the cavity is positioned on the outer annular surface of the cavity.
3. The turboset main oil pump tooth coupling of claim 2, wherein: the diameter of the sewage discharge channel (301) is 3-4 mm.
4. The turboset main oil pump tooth coupling of claim 2, wherein: the sewage discharge channels (301) are 2-4 uniformly distributed along the circumference.
5. The turboset main oil pump tooth coupling of claim 1, wherein: the end face of the inner gear sleeve (2) is provided with a limiting step (201), and the limiting step (201) is in contact with the oil retainer (4).
6. The turboset main oil pump tooth coupling of claim 5, wherein: an end cover (7) is further arranged on the end face of the oil slinger (201), and the end cover (7) is detachably connected to the inner gear sleeve (2).
7. The turboset main oil pump tooth coupling of claim 5, wherein: the oil slinger (4) is provided with an external thread which is connected with the internal gear sleeve (2).
8. The turboset main oil pump tooth coupling of claim 1, wherein: the thickness of the oil scraper ring (4) is 3-4 mm.
9. The utility model provides a steam turbine group main oil pump tooth form shaft coupling's transformation method, this steam turbine group main oil pump tooth form shaft coupling includes external gear axle sleeve (1a), with internal gear cover (2a) of external gear axle sleeve (1a) meshing, second axle sleeve (3a) of being connected through bolt (5a) and internal gear cover (2a), oil passageway (101a) that run through ground on external gear axle sleeve (1a) and be equipped with oil scraper ring (4a), oil scraper ring (4a) outer lane and internal gear cover (2a) contact, be equipped with dirty oil passageway (6a) between oil scraper ring (4a) and internal gear cover (2a), be equipped with on internal gear cover (2a) sewage disposal passageway (201a) that communicate with dirty oil passageway (6a), its characterized in that: the original oil scraper ring (4a) is removed, the flat plate is used for manufacturing the oil scraper ring (4) again, the oil scraper ring (4) is connected with the inner gear sleeve (2a) at the position of the original oil scraper ring (4a), a gap (6) is formed between the newly manufactured oil scraper ring (4) and the outer gear shaft sleeve (1a), the original oil channel (101a) and the sewage discharge channel (201a) are blocked, and the disc surface of the second shaft sleeve (3a) is provided with the sewage discharge channel (301).
10. The method of claim 9 for retrofitting a tooth-shaped coupling for a main oil pump of a turboset, characterized in that: the original oil channel (101a) and the sewage draining channel (201a) are plugged by adopting a conical plug head to be plugged into the oil channel (101a) and the sewage draining channel (201a) from the inner side, and then the edges of the conical plug head are sealed and welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010968221.3A CN111998009A (en) | 2020-09-15 | 2020-09-15 | Gear coupling of main oil pump of steam turbine set and modification method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010968221.3A CN111998009A (en) | 2020-09-15 | 2020-09-15 | Gear coupling of main oil pump of steam turbine set and modification method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111998009A true CN111998009A (en) | 2020-11-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010968221.3A Pending CN111998009A (en) | 2020-09-15 | 2020-09-15 | Gear coupling of main oil pump of steam turbine set and modification method thereof |
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| CN (1) | CN111998009A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113649418A (en) * | 2021-07-14 | 2021-11-16 | 首钢京唐钢铁联合有限责任公司 | Tooth coupling and hot rolling finishing mill group |
-
2020
- 2020-09-15 CN CN202010968221.3A patent/CN111998009A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113649418A (en) * | 2021-07-14 | 2021-11-16 | 首钢京唐钢铁联合有限责任公司 | Tooth coupling and hot rolling finishing mill group |
| CN113649418B (en) * | 2021-07-14 | 2023-10-24 | 首钢京唐钢铁联合有限责任公司 | Gear coupling and hot rolling finishing mill group |
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