CN114992121A - Sealing device and sealing method for Roots blower - Google Patents
Sealing device and sealing method for Roots blower Download PDFInfo
- Publication number
- CN114992121A CN114992121A CN202210697352.1A CN202210697352A CN114992121A CN 114992121 A CN114992121 A CN 114992121A CN 202210697352 A CN202210697352 A CN 202210697352A CN 114992121 A CN114992121 A CN 114992121A
- Authority
- CN
- China
- Prior art keywords
- expansion ring
- shaft
- roots blower
- shaft sleeve
- oil filling
- 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
- 238000007789 sealing Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 7
- 239000004519 grease Substances 0.000 claims abstract description 13
- 230000001050 lubricating effect Effects 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/126—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention mainly relates to the field of Roots blowers, in particular to a sealing device and a sealing method of a Roots blower. The sealing device comprises a machine shell, wherein bearing covers are respectively arranged on two sides of the machine shell, shaft sleeves are arranged in the bearing covers, and the shaft sleeves are respectively sleeved on a driving shaft and a driven shaft and are tightly attached to the machine shell; the outer surface of the shaft sleeve is provided with a plurality of circles of annular grooves, expansion rings are arranged in the annular grooves, the width of each expansion ring is smaller than that of each annular groove, and the outer diameter of each expansion ring is larger than the depth of each annular groove; an oil filling hole is formed in the bearing cover and communicated with the position of the shaft sleeve. The wall plate is provided with the pressure filling oil cup to fill lubricating grease, so that the sealing effect is achieved, the expansion ring and the shaft sleeve are lubricated, the abrasion of the expansion ring is reduced, the friction power is reduced, the service life of a relative rotating part is prolonged, and the pressure filling oil cup is particularly obvious in the application of a Roots blower with high rotating speed; the fan can be under the circumstances of not shutting down through the pressure filling oil cup filling lubricating grease, and it is convenient to maintain.
Description
Technical Field
The invention mainly relates to the field of Roots blowers, in particular to a sealing device and a sealing method of a Roots blower.
Background
The Roots blower is widely applied to the industrial fields of environmental protection, electric power, petroleum, chemical industry, grain transportation and the like. The special gas is conveyed by adopting a mechanical seal generally, and the mechanical seal is expensive, complex in structure and high in maintenance cost. The sealing scheme has low cost and better solves the problem of leakage of special gas.
Disclosure of Invention
In order to solve the problems, the invention adopts the following technical scheme.
On one hand, the invention provides a sealing device of a Roots blower, which comprises a machine shell, wherein bearing covers are respectively arranged on two sides of the machine shell, shaft sleeves are respectively arranged in the two bearing covers, and the two shaft sleeves are respectively sleeved on a driving shaft and a driven shaft and are tightly attached to the machine shell;
the outer surface of the shaft sleeve is provided with a plurality of circles of annular grooves, expansion rings are arranged in the annular grooves, the width of each expansion ring is smaller than that of the annular groove, the outer diameter of each expansion ring is larger than the depth of the annular groove, and more than half of the expansion ring is deeply embedded into the annular groove; an oil filling hole is formed in the bearing cover and communicated with the position of the shaft sleeve.
Furthermore, the expansion ring is a metal elastic ring, the outer diameter of the expansion ring is larger than the inner diameter of the corresponding position of the bearing cover, and the expansion ring and the bearing cover are in interference fit.
Furthermore, a pressure oil filling cup is arranged at the outer end of the oil filling hole.
Furthermore, lubricating grease is filled in the oil filling hole.
In another aspect, the present invention provides a roots blower sealing method, including:
s1, forming 2-5 annular grooves on the outer surface of the shaft sleeve, and respectively sleeving the driving shaft and the driven shaft after arranging an expansion ring in each annular groove;
s2, drilling an oil filling hole on the bearing cap to enable the oil filling hole to be communicated with the cavity where the expansion ring and the shaft sleeve are located, and installing the bearing cap;
s3, enough grease is injected into the cavity position through the oil injection hole, and a pressure injection cup is arranged at the oil injection hole for sealing.
The invention has the following beneficial effects:
the pressure filling oil cup is arranged on the wallboard to fill lubricating grease, so that the sealing effect is achieved, the expansion ring and the shaft sleeve are lubricated, the abrasion of the expansion ring is reduced, the friction power is reduced, the service life of a relative rotating part is prolonged, and the pressure filling oil cup is particularly obvious in application of a Roots blower at a high rotating speed.
The oil filling hole is provided with a pressure filling oil cup to prevent lubricating grease from overflowing.
The fan can be under the circumstances of not shutting down through the pressure filling oil cup filling lubricating grease, and it is convenient to maintain.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a partial schematic view of a portion a of fig. 1.
Description of reference numerals: 1. the oil pump comprises a shell, 2, a pressure filling oil cup, 3, a bearing cover, 4, an expansion ring, 5, a shaft sleeve, 6, an oil filling hole, 7, a driving shaft, 8 and a driven shaft.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1
A sealing device of a Roots blower is shown in figures 1-2 and comprises a machine shell 1, wherein bearing covers 3 are respectively arranged on two sides of the machine shell 1, shaft sleeves 5 are arranged in the bearing covers 3, and the shaft sleeves 5 are respectively sleeved on a driving shaft 7 and a driven shaft 8 and are tightly attached to the machine shell 1;
the outer surface of the shaft sleeve 5 is provided with a plurality of rings of annular grooves, the annular grooves are internally provided with expansion rings 4, the width of each annular groove is smaller than the width of the annular groove, the outer diameter of each annular groove is larger than the depth of the annular groove, and more than half of the expansion rings 4 are deeply embedded into the annular grooves, so that the expansion rings 4 are positioned in the annular grooves and can provide proper friction force for the bearing cover 3; an oil filling hole 6 is formed in the bearing cover 3, and the oil filling hole 6 is communicated with the position of the shaft sleeve 5.
The expansion ring 4 is a metal elastic ring, the outer diameter of the expansion ring is larger than the inner diameter of the corresponding position of the bearing cover 3, and the expansion ring and the bearing cover are in interference fit. And the outer end of the oil filling hole 6 is provided with a pressure oil filling cup 2. Lubricating grease is filled in the oil filling hole 6.
Example 2
A roots blower sealing method comprising:
s1, 3 annular grooves are formed in the outer surface of the shaft sleeve 5, and after an expansion ring 4 is arranged in each annular groove, the driving shaft 7 and the driven shaft 8 are sleeved with the expansion rings respectively;
s2, drilling an oil filling hole 6 on the bearing cover 3, enabling the oil filling hole 6 to be communicated with a cavity where the expansion ring 4 and the shaft sleeve 5 are located, and installing the bearing cover 3;
s3, injecting enough lubricating grease into the cavity position through the oil injection hole 6, installing the pressure injection cup 2 on the oil injection hole 6 for sealing, and then supplementing the lubricating grease in the cavity through the pressure injection cup 2; the lubricating grease can lubricate the expansion ring 4 and the shaft sleeve 3 while playing a sealing role, thereby reducing the abrasion of the expansion ring 4 and reducing the friction power.
The present invention can be easily implemented by those skilled in the art from the above detailed description. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the basis of the disclosed embodiments, a person skilled in the art can combine different technical features at will, thereby implementing different technical solutions.
Claims (5)
1. The utility model provides a roots blower sealing device which characterized in that: the device comprises a machine shell (1), wherein bearing covers (3) are respectively arranged on two sides of the machine shell (1), shaft sleeves (5) are respectively arranged in the two bearing covers (3), and the two shaft sleeves (5) are respectively sleeved on a driving shaft (7) and a driven shaft (8) and tightly attached to the machine shell (1);
the outer surface of the shaft sleeve (5) is provided with a plurality of rings of annular grooves, expansion rings (4) are arranged in the annular grooves, the width of each expansion ring (4) is smaller than that of each annular groove, the outer diameter of each expansion ring is larger than the depth of each annular groove, and more than half of the expansion rings (4) are deeply embedded into the annular grooves; an oil filling hole (6) is formed in the bearing cover (3), and the oil filling hole (6) is communicated with the position of the outer wall of the shaft sleeve (5).
2. The roots blower sealing device according to claim 1, wherein: the expansion ring (4) is a metal elastic ring, the outer diameter of the expansion ring is larger than the inner diameter of the corresponding position of the bearing cover (3), and the expansion ring and the bearing cover are in interference fit.
3. The roots blower sealing device according to claim 1, wherein: and the outer end of the oil filling hole (6) is provided with a pressure oil filling cup (2).
4. The roots blower sealing device according to claim 1, wherein: lubricating grease is filled in the oil filling hole (6).
5. A roots blower sealing method, comprising:
s1, 2-5 annular grooves are formed in the outer surface of a shaft sleeve (5), and after an expansion ring (4) is arranged in each annular groove, the shaft sleeve (5) is respectively sleeved on a driving shaft (7) and a driven shaft (8);
s2, drilling an oil filling hole (6) in the bearing cover (3), enabling the oil filling hole (6) to be communicated with cavities where the expansion ring (4) and the shaft sleeve (5) are located, and installing the bearing cover (3);
s3, enough grease is injected into the cavity position through the oil injection hole (6), and the oil injection hole (6) is provided with the pressure injection cup (2) for sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210697352.1A CN114992121A (en) | 2022-06-20 | 2022-06-20 | Sealing device and sealing method for Roots blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210697352.1A CN114992121A (en) | 2022-06-20 | 2022-06-20 | Sealing device and sealing method for Roots blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114992121A true CN114992121A (en) | 2022-09-02 |
Family
ID=83036028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210697352.1A Pending CN114992121A (en) | 2022-06-20 | 2022-06-20 | Sealing device and sealing method for Roots blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114992121A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2830713Y (en) * | 2005-07-19 | 2006-10-25 | 长沙鼓风机厂有限责任公司 | Large Roots blower |
| CN201236804Y (en) * | 2008-08-11 | 2009-05-13 | 上海吴淞煤气制气有限公司 | Shaft sealing device for Roots coal gas discharging machine |
| CN201827079U (en) * | 2010-10-28 | 2011-05-11 | 浙江江山化工股份有限公司 | Seal structure of rotary shaft of roots blower |
| CN104329252A (en) * | 2014-11-29 | 2015-02-04 | 山东明天机械有限公司 | High-pressure air-cooling roots blower |
| CN206111652U (en) * | 2016-10-07 | 2017-04-19 | 肇庆市扬光油墨有限公司 | Fan packing seal structure |
| CN209976784U (en) * | 2019-06-09 | 2020-01-21 | 山东百思奇机械有限公司 | Air sealing device of fan |
-
2022
- 2022-06-20 CN CN202210697352.1A patent/CN114992121A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2830713Y (en) * | 2005-07-19 | 2006-10-25 | 长沙鼓风机厂有限责任公司 | Large Roots blower |
| CN201236804Y (en) * | 2008-08-11 | 2009-05-13 | 上海吴淞煤气制气有限公司 | Shaft sealing device for Roots coal gas discharging machine |
| CN201827079U (en) * | 2010-10-28 | 2011-05-11 | 浙江江山化工股份有限公司 | Seal structure of rotary shaft of roots blower |
| CN104329252A (en) * | 2014-11-29 | 2015-02-04 | 山东明天机械有限公司 | High-pressure air-cooling roots blower |
| CN206111652U (en) * | 2016-10-07 | 2017-04-19 | 肇庆市扬光油墨有限公司 | Fan packing seal structure |
| CN209976784U (en) * | 2019-06-09 | 2020-01-21 | 山东百思奇机械有限公司 | Air sealing device of fan |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112065860B (en) | Thin oil lubricating structure of rolling bearing | |
| CN105317928A (en) | Lubricating and sealing structure of step chain | |
| CN108861343B (en) | Sprocket device of scraper conveyor | |
| CN214887700U (en) | Multiple combined sealing device of hydrogen circulating pump | |
| CN114992121A (en) | Sealing device and sealing method for Roots blower | |
| CN204900524U (en) | Biserial cylindrical roller bearing | |
| CN103438196A (en) | Non-contact seal assembly for gear box | |
| CN201934674U (en) | Shaft seal structure of framework oil seals with lubricating mode | |
| CN203488683U (en) | Non-contact type sealing assembly for gear case | |
| CN212766527U (en) | Conveyor chain link driving wheel set | |
| CN109639023B (en) | Motor capable of preventing oil leakage and temperature rise and method for preventing oil leakage bearing of inner cover and outer cover of motor from temperature rise | |
| CN207539074U (en) | Transmission lubrication type water-ring vacuum pump | |
| CN101432555B (en) | Method of retaining a dynamic seal in a bore that has a draft | |
| CN211423186U (en) | High-speed grease lubrication deep groove ball bearing | |
| JP2013011286A (en) | Cage for rolling bearing | |
| CN208564841U (en) | A kind of vane motor | |
| CN206159022U (en) | Novel air cooling roots vacuum pump | |
| CN220435409U (en) | Motor bearing sealing structure | |
| CN206845524U (en) | A kind of deep well pump special angular contact ball bearing | |
| CN107218219B (en) | Bearing lubricating system for top of vertical dry pump | |
| CN201116535Y (en) | Bearing dynamic sealing structure for single-stage single-sucking centrifugal pump | |
| CN2760210Y (en) | A totally enclosed screw drill drive shaft | |
| CN212337930U (en) | Dry oil bearing cartridge | |
| CN202108877U (en) | Pressure relief type sealing deep groove ball bearing | |
| CN2594555Y (en) | Leakage proof sealing cover |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |