AU2015349532B2 - Transmission apparatus for contra-rotating impeller ventilation - Google Patents
Transmission apparatus for contra-rotating impeller ventilation Download PDFInfo
- Publication number
- AU2015349532B2 AU2015349532B2 AU2015349532A AU2015349532A AU2015349532B2 AU 2015349532 B2 AU2015349532 B2 AU 2015349532B2 AU 2015349532 A AU2015349532 A AU 2015349532A AU 2015349532 A AU2015349532 A AU 2015349532A AU 2015349532 B2 AU2015349532 B2 AU 2015349532B2
- Authority
- AU
- Australia
- Prior art keywords
- bevel gear
- cross shaft
- transmission
- spiral bevel
- counter
- 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.)
- Ceased
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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- 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
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
- F16H2057/0235—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly specially adapted to allow easy accessibility and repair
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Gear Transmission (AREA)
Abstract
A transmission apparatus for contra-rotating impeller ventilation. According to the apparatus, flanges (13, 21) output to a first-stage impeller (14) and a second-stage impeller (18) to achieve contra-rotation of the impellers; tapered roller bearings (20) are arranged at both ends of a cross shaft (9) and can run at a high speed, so that the requirement on high rotating speed of the impellers can be met. The apparatus is a keel type transmission case, the cross shaft is used as the main body, and the case only bears a supporting force on the longitudinal shaft end of the cross shaft; therefore, the two sets of blades are closest to each other under a bevel gear transmission condition, so that the structure is more compact and the efficiency of a contra-rotating impeller ventilation device is improved.
Description
A TRANSMISSION OF VENLITATION APPARATUS WITH
COUNTER-ROTATING IMPELLERS
Technical Field
The invention relates to a transmission of ventilation apparatus, in particular to a technical solution applicable for a ventilation apparatus with counter-rotating impellers.
Background
An appropriate ventilation system can provide each intended site with a plenty of fresh air, suitable temperature and humidity, and good air conditions using ventilation power in the most economical way, ensuring safety of the workers and improving the environment. The property of the ventilation apparatus has a very important influence on the effect of ventilation.
The majority of existing ventilation apparatus with counter-rotating impellers uses two stage impellers driven by two motors that have equal capacity and rotate at equal speed in opposite directions respectively. The main problems are as follows: (1) since the motor and the impeller are placed in the air duct together, an annular channel is formed between the impeller/motor and the main air duct, which has a great influence on the uniformity and straightness of airflow, and consequentially on the performance of the ventilation apparatus with counter-rotating impellers; (2) since the motor and the impeller are directly jointed to each other and fixed within the air duct, the heat dissipation condition of the electric motor is relatively poor in the air duct compared with that in the atmosphere, and the motor is not easy to repair.
An now available prior art is disclosed in publication No. 203463562U entitled as “a Reversing Box with Spiral Bevel Gear”, wherein the reversing box includes a first output shaft, a second output shaft, an input shaft, and spiral bevel gears. The first output shaft and the second output shaft are each perpendicularly arranged with respect to the input shaft. In operation, when the input shaft is rotated, it will drive the first and second output shafts to perform reverse rotation at the same time. Due to its large volume and complex structure, such reversing box is not suitable for the ventilation apparatus of counter-rotating type requiring a compact structure. Therefore, it is particularly important to develop a suitable
2015349532 26 Feb 2019 transmission for counter-rotating impellers.
Summary of the Invention
In an embodiment, there is provided a transmission of ventilation apparatus with counter-rotating impellers, comprising: a cross shaft having a first axial end, a second axial end and a longitudinal end; a first spiral bevel gear provided at the longitudinal end of the cross shaft; a second spiral bevel gear provided at a first axial end of the cross shaft; a third spiral bevel gear provided at a second axial end of the cross shaft, the first spiral bevel gear being engageable with each of the second spiral bevel gear and the third spiral bevel gear such that upon engagement, torque from the second bevel gear is transmitted to the first bevel gear and torque is transmitted from the first spiral bevel gear to the third spiral bevel gear to achieve reverse rotation of the transmission; a first flange arranged adjacent the second spiral bevel gear and connected to the cross shaft via a flat key; a second flange arranged adjacent the third spiral bevel gear and connected to the cross shaft via a flat key; a first stage impeller and a second stage impeller, each mounted on the cross shaft and operable such that the first flange transmits torque to the first stage impeller and the second flange transmits torque to the second stage impeller to achieve counter rotation of the impellers, wherein, the transmission of ventilation apparatus with counter-rotating impellers adopts a keel-type transmission box using the entire cross shaft as the main body, and the cross shaft and the bushing acting as a transmission shaft form a double-point simply-supported supporting structure.
The purpose of the invention is to provide a transmission of ventilation apparatus with counter-rotating impellers which aims to solve the problems of the existing ventilation apparatus with counter-rotating impellers, i.e. poor performance, poor heat dissipation and inconvenient maintenance. When the bevel gears are used for transmission, the distance between the two sets of blades can be minimized, so as to improve the efficiency of the ventilation apparatus with counter-rotating impellers.
In order to achieve the said purpose, the technical solution of the invention lies in a transmission for counter-rotating impellers comprising a cross shaft, a bushing, a flange, a bevel gear shaft and so on, characterized in that, the axial end and longitudinal end of the cross shaft are provided with a spiral bevel gear. When the bevel gears are used for transmission, the distance between the two sets of wind blades can be minimized.
2015349532 26 Feb 2019
By adopting the said technical solution, the cross shaft rotates and drives the spiral bevel gear to rotate at the same time, the reverse rotation of the transmission is performed, and the efficiency of ventilation apparatus with counter-rotating impellers is improved.
The flanges transmit torque to each of the first stage impeller and second stage impeller to realize the counter rotation of the impellers.
Both ends of the cross shaft are provided with a tapered roller bearing. By adopting the said technical solution and using the tapered roller bearing which can bear high speed rotation, the requirement on high rotating speed of the impellers can be met.
The invention involves a keel-type transmission box which uses a cross shaft as the main body. The body of the transmission box only bears the supporting force from the longitudinal ends of the cross shaft, so the invention has the advantages of simple and compact structure and high transmission efficiency.
The invention relates to a transmission for counter-rotating impellers which solves the problems of the existing ventilation apparatus with counter-rotating impellers including poor performance, poor heat dissipation and inconvenient maintenance. When using the bevel gear for transmission, the distance of the two sets of impellers can be the shortest, so that the structure is more compact, and the efficiency of the ventilation apparatus with counter-rotating impellers is improved. The flanges transmit torque to each of the first stage impeller and second stage impeller to realize the counter rotation of the impellers. Both ends of the cross shaft are provided with a tapered roller bearing which can bear high speed rotation, and thus the requirement on the high rotating speed of the impellers can be met. The invention involves a keel-type transmission box which uses a cross shaft as the main body. The body of transmission box only bears the supporting force from the longitudinal ends of the cross shaft. Therefore, the invention has the advantages of simple and compact structure and high transmission efficiency.
Brief Description of Drawings
Figure 1 is an overall schematic diagram of the invention.
Figure 2 is a schematic diagram of the structure of the invention.
Figure 3 is a sectional view of the structure of the invention taken along the A-A line in Figure 2.
2015349532 26 Feb 2019
In the drawings: 1-motor; 2-cross shaft type of universal coupler; 3-first stage impeller; 4-transmission for counter-rotating impellers; 5-second stage impeller; 6-air duct; 7-cross shaft type of universal coupler; 8-deep groove ball bearing; 9-cross shaft; 10-oil seal; 11-plum coupler; 12-bolt; 13-first flange; 14-first stage impeller; 15-end cover; 16-ventilation bolt; 17-flat key; 18-second stage impeller; 19-first spiral bevel gear; 20-tapered roller bearing; 21-second flange; 22-third spiral bevel gear; 23-bevel gear shaft; 24-oil draining bolt; 25-second spiral bevel gear; 26-flat key; 27-bushing; 28-round nut; 29-tapered roller bearing; 30-air duct.
Detailed Description
The specific embodiments of the invention will be further discussed hereinafter in connection with the accompanying drawings, to the extent that the skilled person in the art is enabled to implement it.
As shown in Figures 1, 2 and 3, a transmission of a ventilation apparatus with counter-rotating impellers comprises a cross shaft 9, a bushing 27, a first flange 13 and a bevel gear shaft. They are configured as follows: the transmission of the ventilation apparatus with counter-rotating impellers uses the cross shaft 9 as its main body, and employ a transmission box of the keel type which bears the longitudinal ends of the cross shaft; the cross shaft 9 is designed to be provided with a tapered roller bearing 20 at both ends, the axial ends of the cross shaft 9 are provided with a second spiral bevel gear 25 and a third spiral bevel gear 22 respectively, and a longitudinal end thereof is provided with a first spiral bevel gear 19; the first spiral bevel gear 19 is designed to engage with each of the second spiral bevel gear 25 and the third spiral bevel gear 22; the first flange 13 transmits torque to the first stage impeller 14, and a flange 21 transmits torque to the second stage impeller 18, so as to achieve the counter rotation of the impellers, and to minimize the distance between the two sets of blades when the bevel gears are used for transmission. This configuration has a compact structure occupying little space, and is specially designed for the narrow space in coal mines, and has a high practicability. It has the advantages of small size, compact structure, and high efficiency of the ventilation, as compared with the existing ventilation apparatus used in underground coal mines.
Further embodiments are as follows:
2015349532 26 Feb 2019
As shown in Figure 1, a motor 1 used as a power source transmits power to the first stage impeller 3 through a cross shaft type of universal coupler 2. Then the transmission for the counter-rotating impellers 4 drives the second stage impeller 5 to achieve the counter rotation of the impellers.
As shown in Figures 2 and 3, the invention relates to a transmission for counter-rotating impellers comprising a cross shaft 9, a bushing 27, a flange 13, a bevel gear shaft 23 and so on. They are configured as follows: the axial ends of the cross shaft 9 are provided with a second spiral bevel gear 25 and a third spiral bevel gear 22, and a longitudinal end thereof is provided with a first spiral bevel gear 19; the first spiral bevel gear 19 engages with each of the second spiral bevel gear 25 and third the spiral bevel gear
22. When the bevel gears are employed for transmission, the smaller the distance between the two sets of blades is designed, the more compact the structure is.
By adopting the technical solution as described above, the cross shaft rotates and drives the spiral bevel gear to rotate at the same time, the reverse rotation of the transmission is performed, and the efficiency of the ventilation apparatus with the counter-rotating impellers is improved.
The flange 13 transmits torque to the first stage impeller 14, and the flange 21 transmits torque to the second stage impeller 18, to achieve the counter rotation of the impellers.
Both ends of the cross shaft 9 are provided with a tapered roller bearing 20. By adopting the technical solution as mentioned above and using the tapered roller bearing which can bear high speed rotation, the requirement on the high rotating speed of the impellers can be fulfilled.
The invention relates to a keel-type transmission box using a cross shaft as its main body. The body of the transmission box only withstands the supporting force from the longitudinal shaft of the cross shaft. Therefore, the invention has the advantages of simple and compact structure and high transmission efficiency.
2015349532 26 Feb 2019
Claims (3)
1. A transmission of ventilation apparatus with counter-rotating impellers, comprising:
a cross shaft having a first axial end, a second axial end and a longitudinal end;
a first spiral bevel gear provided at the longitudinal end of the cross shaft;
a second spiral bevel gear provided at a first axial end of the cross shaft;
a third spiral bevel gear provided at a second axial end of the cross shaft, the first spiral bevel gear being engageable with each of the second spiral bevel gear and the third spiral bevel gear such that upon engagement, torque from the second bevel gear is transmitted to the first bevel gear and torque is transmitted from the first spiral bevel gear to the third spiral bevel gear to achieve reverse rotation of the transmission;
a first flange arranged adjacent the second spiral bevel gear and connected to the cross shaft via a flat key;
a second flange arranged adjacent the third spiral bevel gear and connected to the cross shaft via a flat key;
a first stage impeller and a second stage impeller, each mounted on the cross shaft and operable such that the first flange transmits torque to the first stage impeller and the second flange transmits torque to the second stage impeller to achieve counter rotation of the impellers, wherein, the transmission of ventilation apparatus with counter-rotating impellers adopts a keel-type transmission box using the entire cross shaft as the main body, and the cross shaft and the bushing acting as a transmission shaft form a double-point simply-supported supporting structure.
2015349532 26 Feb 2019
2. The transmission of ventilation apparatus with counter-rotating impellers according to claim 1, wherein the bushing in linkage operation with the cross shaft is not a conventional bushing, but instead, transmits torque by means of the first flange or second flange when the bevel gears are used for transmission, to play the role of a transmission shaft.
3. The transmission of ventilation apparatus with counter-rotating impellers according to claim 1, characterized in that, the shorter shaft of the cross shaft can balance axial forces, the body of the transmission box only bears supporting force from the longitudinal ends of the cross shaft, the arrangement and fixation of the two impellers are simplified, load distribution is proper, and the load condition of a transmission component is improved, so that the service life of bearings and other components are prolonged.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410671942.2 | 2014-11-22 | ||
| CN201410671942.2A CN104482117B (en) | 2014-11-22 | 2014-11-22 | A kind of contra-rotating impeller ventilation transmission device |
| PCT/CN2015/000799 WO2016078199A1 (en) | 2014-11-22 | 2015-11-19 | Transmission apparatus for contra-rotating impeller ventilation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2015349532A1 AU2015349532A1 (en) | 2017-03-09 |
| AU2015349532B2 true AU2015349532B2 (en) | 2019-03-21 |
Family
ID=52756695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2015349532A Ceased AU2015349532B2 (en) | 2014-11-22 | 2015-11-19 | Transmission apparatus for contra-rotating impeller ventilation |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN104482117B (en) |
| AU (1) | AU2015349532B2 (en) |
| WO (1) | WO2016078199A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482117B (en) * | 2014-11-22 | 2017-10-24 | 太原理工大学 | A kind of contra-rotating impeller ventilation transmission device |
| CN104989657B (en) * | 2015-06-12 | 2017-05-17 | 太原理工大学 | Contra-rotating impeller ventilation equipment driven by long shaft |
| CN112343843A (en) * | 2020-10-26 | 2021-02-09 | 湖北工程学院 | Disrotatory axial-flow type main ventilator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007303286A (en) * | 2006-05-09 | 2007-11-22 | Denso Corp | Contra-rotating blower for vehicle |
| CN101403389A (en) * | 2008-11-14 | 2009-04-08 | 西安交通大学 | Disrotatory axial fan |
| US20120294719A1 (en) * | 2011-05-18 | 2012-11-22 | Rolls-Royce Plc | Vertical lift fan |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6372052B1 (en) * | 1994-08-15 | 2002-04-16 | Edward A. Jones | Portable combustion-driven H.V.A.C. duct cleaning system |
| JP3572154B2 (en) * | 1996-10-11 | 2004-09-29 | 三菱重工業株式会社 | Multi-shaft, multi-stage combined type compressor |
| CN2793377Y (en) * | 2005-04-21 | 2006-07-05 | 孙克勤 | Double-stage and disrotatory axial-flow fan |
| JP4829008B2 (en) * | 2006-05-19 | 2011-11-30 | 川崎重工業株式会社 | Cross wind blower and blow method |
| JP5285516B2 (en) * | 2009-06-30 | 2013-09-11 | 株式会社三井三池製作所 | Jet fan |
| CN203321843U (en) * | 2013-06-27 | 2013-12-04 | 山东科技大学 | Novel mine efficient axial flow fan |
| CN203394802U (en) * | 2013-08-19 | 2014-01-15 | 平安电气股份有限公司 | External type one-to-two counter-rotating axial-flow fan at lateral side of motor |
| CN203847411U (en) * | 2014-01-02 | 2014-09-24 | 山东科技大学 | Shaft-shared double-propeller axial flow fan |
| CN104482117B (en) * | 2014-11-22 | 2017-10-24 | 太原理工大学 | A kind of contra-rotating impeller ventilation transmission device |
-
2014
- 2014-11-22 CN CN201410671942.2A patent/CN104482117B/en not_active Expired - Fee Related
-
2015
- 2015-11-19 AU AU2015349532A patent/AU2015349532B2/en not_active Ceased
- 2015-11-19 WO PCT/CN2015/000799 patent/WO2016078199A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007303286A (en) * | 2006-05-09 | 2007-11-22 | Denso Corp | Contra-rotating blower for vehicle |
| CN101403389A (en) * | 2008-11-14 | 2009-04-08 | 西安交通大学 | Disrotatory axial fan |
| US20120294719A1 (en) * | 2011-05-18 | 2012-11-22 | Rolls-Royce Plc | Vertical lift fan |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104482117A (en) | 2015-04-01 |
| CN104482117B (en) | 2017-10-24 |
| AU2015349532A1 (en) | 2017-03-09 |
| WO2016078199A1 (en) | 2016-05-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DA3 | Amendments made section 104 |
Free format text: THE NATURE OF THE AMENDMENT IS: AMEND THE NAME OF THE INVENTOR TO READ KOU, ZIMING; DA, SHANRONG; WEI, JIN; GAO, GUIJUN; LI, TING; LI, SHENG; WU, JUAN; ZHANG, JING AND KOU, YANFEI |
|
| FGA | Letters patent sealed or granted (standard patent) | ||
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |