WO1991000430A1 - Method and device for cleaning fan impellers - Google Patents
Method and device for cleaning fan impellers Download PDFInfo
- Publication number
- WO1991000430A1 WO1991000430A1 PCT/SE1990/000456 SE9000456W WO9100430A1 WO 1991000430 A1 WO1991000430 A1 WO 1991000430A1 SE 9000456 W SE9000456 W SE 9000456W WO 9100430 A1 WO9100430 A1 WO 9100430A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- compressed air
- cannon
- shots
- fan
- impeller blades
- Prior art date
Links
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
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
Definitions
- the present invention relates to a method and device for cleaning fan impellers.
- the purpose of the present invention is to solve this problem by removing or preventing deposits and build-ups of dust or other contaminants on the impeller blades during rotation of the impeller. This purpose is obtained by a method according to claim 1 and a device according to claim 6.
- the cleaning effect becomes more efficient than by continously blowing air towards the impeller, and at the same time the consumption of compressed air is reduced.
- Another advantage is that the cleaning can be performed during rotation of the impeller without affecting the reliability of the fan rotor, i.e. there are no risks for damages to impeller or fan casing.
- the present invention can be used for removing both soft and hard deposits.
- the shooting of compressed air pulses can be performed in those directions which give the most efficient cleaning and the shots of compressed air can be directed towards those parts of the blade surfaces where the deposits normally are most pronounced, i.e. towards e.g. leading edges of the blades.
- air cannon Any device which can produce compressed air pulses can be used. Such a device will be denoted in the text as an "air cannon".
- the cannon for producing shots of compressed air can be operated manually or controlled by an automatic processor for operating the cannon periodically.
- the periodicity can be adjusted depending on the kind of deposits which has to be removed, i.e. the periodicity is chosen depending on e.g. thickness and hardness of the deposit.
- two or more cannons for producing shots of compressed air are mounted on the fan casing for simultaneous or sequential operation. With this embodiment a more efficient cleaning can be obtained in that different cannons can be working on different areas of the impeller blades.
- FIG. 1 The function of an embodiment of the compressed air cannon is illustrated in Fig. 1.
- the cannon operates in three phases. Firstly the air outlet 12 is closed and the container 4 is filled with compressed air through the conduit 6 to a predetermined pressure which can be varied and adapted to the intended use.
- the cannon is now in a standby position ready for use with the container 4 filled with compressed air to the predetermined level, and the air intake 6 and the air discharge 12 are closed. During this phase there is no further consumption of compressed air.
- the cannon is shooting, i.e. a pulse of compressed air is delivered from the outlet 12 of the cannon.
- Fig. 2 shows an embodiment of the device according to the invention with two compressed air cannons mounted on the fan casing or fan croll 18.
- the directions of the outlets 20, 22 of the compressed air cannons 14, 16 are orientated to clean those areas of the impeller blades where the build-ups and deposits of dust and other contaminants are most severe.
- Different orientations of the outlets 20, 22 can of course be used to obtain a cleaning which is as efficient as possible by directing the compressed air pulses towards different parts of the surfaces of the impeller blades 24 and by bringing the shots to hit the surfaces of the blades in different directions. In this connection the fan rotation must be taken into consideration.
- the cannons 14, 16 can be operated manually or controlled by an automatic processor, which controls the cannons 14, 16 to operate periodically with a predetermined frequency which is chosen depending on the actual use.
- an automatic processor which controls the cannons 14, 16 to operate periodically with a predetermined frequency which is chosen depending on the actual use.
- outlets of the cannons at the impeller discharge can be orientated in a plurality of different directions, e.g. in order to obtain a cleaning of the area of the blades where a maximum of dust is accumulating in the particular application.
- the air cannon 26 is located at the impeller inlet.
- the outlet 28 of the cannon can be in the axial direction of the fan or in any inclined direction in order to deliver the air pulse towards the blades 24.
- Fig. 2 comprises two compressed air cannons, however, this number can of course be varied depending on the needs.
- the device according to the invention has been tested in practice on a kiln fan of centrifugal type in a cement plant and a very good effect has been noted.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
In a method of cleaning fan impellers shots in the form of pulses of compressed air are directed towards the impeller blades (24). A device for cleaning fan impellers comprises at least one compressed air cannon (14, 16), which is disposed to direct shots in the form of pulses of compressed air towards the impeller blades (24).
Description
Method and device for cleaning fan impellers
The present invention relates to a method and device for cleaning fan impellers.
For fans used under heavy environment conditions, like in dusty spaces, such as in kilns of cement plants, deposits of dust on the impellers cause severe problems. Thus deposits and build-ups of dust or other contaminants often give rise to vibrations in the impeller and bearing fatigues.
The purpose of the present invention is to solve this problem by removing or preventing deposits and build-ups of dust or other contaminants on the impeller blades during rotation of the impeller. This purpose is obtained by a method according to claim 1 and a device according to claim 6.
By directing shots in the form of pulses of compressed air towards the impeller blades the cleaning effect becomes more efficient than by continously blowing air towards the impeller, and at the same time the consumption of compressed air is reduced. Another advantage is that the cleaning can be performed during rotation of the impeller without affecting the reliability of the fan rotor, i.e. there are no risks for damages to impeller or fan casing. The present invention can be used for removing both soft and hard deposits.
According to an advantageous embodiment of the invention the shooting of compressed air pulses can be performed in those directions which give the most efficient cleaning and the shots of compressed air can be directed towards those parts of the blade surfaces where the deposits normally are most pronounced, i.e. towards e.g. leading edges of the blades.
Any device which can produce compressed air pulses can be used. Such a device will be denoted in the text as an "air cannon".
According to another advantageous embodiment of the invention the cannon for producing shots of compressed air can be operated manually or controlled by an automatic processor for operating the cannon periodically. The periodicity can be adjusted depending on the kind of deposits which has to be removed, i.e. the periodicity is chosen depending on e.g. thickness and hardness of the deposit. According to one more advantageous embodiment of the device according to the invention two or more cannons for producing shots of
compressed air are mounted on the fan casing for simultaneous or sequential operation. With this embodiment a more efficient cleaning can be obtained in that different cannons can be working on different areas of the impeller blades. The invention is explained more in detail in the following with reference to the enclosed drawings on which Fig. 1 shows a general view of one example of an air cannon for producing pulses or shots of compressed air and Figures 2 and 3 show embodiments, chosen as examples, of the device adapted to a centrifugal fan according to the invention.
The function of an embodiment of the compressed air cannon is illustrated in Fig. 1.
Generally the cannon operates in three phases. Firstly the air outlet 12 is closed and the container 4 is filled with compressed air through the conduit 6 to a predetermined pressure which can be varied and adapted to the intended use.
Secondly the cannon is now in a standby position ready for use with the container 4 filled with compressed air to the predetermined level, and the air intake 6 and the air discharge 12 are closed. During this phase there is no further consumption of compressed air. Thirdly the cannon is shooting, i.e. a pulse of compressed air is delivered from the outlet 12 of the cannon.
The sudden high pressure pulse leaving the outlet 12 of the cannon will remove any dust deposits or other contaminants located on ts trajectory.
Fig. 2 shows an embodiment of the device according to the invention with two compressed air cannons mounted on the fan casing or fan croll 18. The directions of the outlets 20, 22 of the compressed air cannons 14, 16 are orientated to clean those areas of the impeller blades where the build-ups and deposits of dust and other contaminants are most severe. Different orientations of the outlets 20, 22 can of course be used to obtain a cleaning which is as efficient as possible by directing the compressed air pulses towards different parts of the surfaces of the impeller blades 24 and by bringing the shots to hit the surfaces of the blades in different directions. In this connection the fan rotation must be taken into consideration.
The cannons 14, 16 can be operated manually or controlled by an automatic processor, which controls the cannons 14, 16 to operate periodically with a predetermined frequency which is chosen depending on the actual use. By using compressed air cannons delivering pulses or shots of compressed air instead of continuous blowing of air the cleaning effect becomes more efficient and at the same time the consumption of compressed air is reduced.
The outlets of the cannons at the impeller discharge can be orientated in a plurality of different directions, e.g. in order to obtain a cleaning of the area of the blades where a maximum of dust is accumulating in the particular application.
In an other embodiment of the invention shown in Figure 3, the air cannon 26 is located at the impeller inlet. The outlet 28 of the cannon can be in the axial direction of the fan or in any inclined direction in order to deliver the air pulse towards the blades 24.
The embodiment shown in Fig. 2 comprises two compressed air cannons, however, this number can of course be varied depending on the needs. The device according to the invention has been tested in practice on a kiln fan of centrifugal type in a cement plant and a very good effect has been noted.
Claims
1. Method of cleaning fan impellers, characterized in that shots in the form of pulses of compressed air are directed towards the impeller blades.
2. Method according to claim 1, characterized in that the shooting is performed from the outlet of the impeller and is directed towards the impeller blades in any suitable direction.
3. Method according to claim 1, characterized in that the shooting is performed through the inlet of the fan.
4. Method according to any one of the claims 1 - 3, characterized in that the shots a.re directed towards the surfaces of the impeller blades, especially towards the leading edges of the blades.
5. Cleaning device for fan impellers, characterized in that at least one compressed air cannon is disposed to direct shots in the form of pulses of compressed air towards the impeller blades.
6. Device according to claim 5, characterized in that the cannon is mounted on the fan casing for shooting through a port in the casing.
7. Device according to claim 5 or 6, characterized in that the cannon is constructed for manual operation.
8. Device according to claim 5 or 6, characterized in that an automatic processor is provided to operate the cannon periodically.
9. Device according to any one of the claims 5 - 8, characterized in that two or more cannons are mounted on the fan casing which cannons are constructed for simultaneous or sequential operation.
10. Device according to claim 9, characterized in that the cannons are disposed to direct shots towards different parts of the impeller blades.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8902335-2 | 1989-06-28 | ||
| SE8902335A SE8902335L (en) | 1989-06-28 | 1989-06-28 | PROCEDURE AND DEVICE FOR CLEANING WHEELS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1991000430A1 true WO1991000430A1 (en) | 1991-01-10 |
Family
ID=20376418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SE1990/000456 WO1991000430A1 (en) | 1989-06-28 | 1990-06-26 | Method and device for cleaning fan impellers |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU5951490A (en) |
| SE (1) | SE8902335L (en) |
| WO (1) | WO1991000430A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0572140A1 (en) * | 1992-05-12 | 1993-12-01 | Matsui Manufacturing Co., Ltd. | Apparatus for removing deposits adhering to surfaces by pulsed air |
| FR2893095A1 (en) * | 2005-11-10 | 2007-05-11 | Aldes Aeraulique Sa | MECHANICAL VENTILATION GROUP COMPRISING MEANS FOR CLEANING THE TURBINE BLADES BY COMPRESSED AIR INSUFFLATION |
| CN107614882A (en) * | 2015-05-20 | 2018-01-19 | 菲舍尔和佩克尔应用有限公司 | Fan or pump arrangement and operating method |
| RU2728979C1 (en) * | 2019-12-20 | 2020-08-03 | Открытое акционерное общество "Научно-производственное объединение по исследованию и проектированию энергетического оборудования им. И.И. Ползунова" (ОАО "НПО ЦКТИ") | Device for air-impact cleaning of surfaces of draft and dust capture equipment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE468134B (en) * | 1990-12-07 | 1992-11-09 | Flaekt Ab | CLEANING DEVICE FOR A FLASH WHEEL, INCLUDING AATMINSTONE AND A PRESSURE AIR CANNON TO AIM SHOT IN THE FORM OF PRESSURE AIR PULSES TO THE FLASH WHEEL |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH455128A (en) * | 1967-09-29 | 1968-04-30 | Von Roll Ag | Process and device for cleaning the impeller of fans for conveying dusty gases |
| GB1442028A (en) * | 1973-10-10 | 1976-07-07 | Polysius Ag | Fan provided with a device for cleaning the fan blades |
| DE3306243A1 (en) * | 1983-02-23 | 1984-08-23 | W. Schlafhorst & Co, 4050 Mönchengladbach | Device for cleaning air laden with textile dust |
-
1989
- 1989-06-28 SE SE8902335A patent/SE8902335L/en not_active Application Discontinuation
-
1990
- 1990-06-26 AU AU59514/90A patent/AU5951490A/en not_active Abandoned
- 1990-06-26 WO PCT/SE1990/000456 patent/WO1991000430A1/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH455128A (en) * | 1967-09-29 | 1968-04-30 | Von Roll Ag | Process and device for cleaning the impeller of fans for conveying dusty gases |
| GB1442028A (en) * | 1973-10-10 | 1976-07-07 | Polysius Ag | Fan provided with a device for cleaning the fan blades |
| DE3306243A1 (en) * | 1983-02-23 | 1984-08-23 | W. Schlafhorst & Co, 4050 Mönchengladbach | Device for cleaning air laden with textile dust |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0572140A1 (en) * | 1992-05-12 | 1993-12-01 | Matsui Manufacturing Co., Ltd. | Apparatus for removing deposits adhering to surfaces by pulsed air |
| FR2893095A1 (en) * | 2005-11-10 | 2007-05-11 | Aldes Aeraulique Sa | MECHANICAL VENTILATION GROUP COMPRISING MEANS FOR CLEANING THE TURBINE BLADES BY COMPRESSED AIR INSUFFLATION |
| WO2007057531A1 (en) * | 2005-11-10 | 2007-05-24 | Aldes Aeraulique | Mechanical ventilation assembly comprising means for cleaning turbine blades by blowing compressed air therethrough |
| CN107614882A (en) * | 2015-05-20 | 2018-01-19 | 菲舍尔和佩克尔应用有限公司 | Fan or pump arrangement and operating method |
| CN107614882B (en) * | 2015-05-20 | 2021-01-05 | 菲舍尔和佩克尔应用有限公司 | Fan or pump arrangement and method of operation |
| RU2728979C1 (en) * | 2019-12-20 | 2020-08-03 | Открытое акционерное общество "Научно-производственное объединение по исследованию и проектированию энергетического оборудования им. И.И. Ползунова" (ОАО "НПО ЦКТИ") | Device for air-impact cleaning of surfaces of draft and dust capture equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| AU5951490A (en) | 1991-01-17 |
| SE8902335L (en) | 1990-12-29 |
| SE8902335D0 (en) | 1989-06-28 |
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