CN214146019U - Efficient ventilator for electric wheel dump truck - Google Patents
Efficient ventilator for electric wheel dump truck Download PDFInfo
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- CN214146019U CN214146019U CN202022346374.2U CN202022346374U CN214146019U CN 214146019 U CN214146019 U CN 214146019U CN 202022346374 U CN202022346374 U CN 202022346374U CN 214146019 U CN214146019 U CN 214146019U
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Abstract
The utility model provides a high-efficient ventilation blower is used to electronic round of dump truck, this fan are single-stage centrifugal fan, have a perpendicular air inlet and two air outlets in front and back down. Because of the limitation of the axial size, the air inlet is narrow and long, and the length and the width are large. The lower part of the air inlet volute is provided with a forward air outlet for providing cooling air for the generator. The upper part of the exhaust volute is provided with a backward air outlet for providing cooling air for the traction motor. The fan rotor is in a cantilever structure and adopts a radial outlet type impeller. The impeller is fitted on a bushing which is keyed to the motor shaft. The utility model discloses can be applied to a ventilation blower that electronic round of tipper used, also can be applied to the compressor ventilation blower field that has special requirements simultaneously, its application mainly includes aspects such as military affairs, energy, electric power, traffic, environmental protection.
Description
Technical Field
The utility model relates to a ventilation blower that electronic round of tipper used especially relates to a large-traffic compact ventilation blower for tipper.
Background
Since the advent of the electric wheel dump truck in 1963, the electric wheel dump truck becomes a key device for mining and transporting large-scale strip mines, and takes on the tasks of mining and transporting 40% of coal and 80% of iron ores in the world. With the development of economy, the demand of the super-tonnage electric wheel dumper increases day by day. At present, the production capacity of a 154-ton or less mining dump truck series is formed in China, but the 220-ton or more mining dump trucks only have the production capacity in a few countries such as America, Russia, Japan and the like, and the 220-ton or more mining dump trucks required by China for mines completely depend on imports.
The electric wheel dumper integrates integration technologies such as motor, electricity and liquid with high-tech technologies, and only a few countries such as the United states, the white Russia, the Japan and the like in the world have production capacity. The development of the electric wheel dumper can not only break the situation that the 220-ton electric wheel dumper in China completely depends on import, but also provide further guarantee for important technical equipment and energy production safety of mines in China.
The power system of the electric wheel dumper is an electric transmission system, a diesel engine with a generator generates electric energy, the electric energy is converted by a frequency converter and then output to a left traction motor and a right traction motor which are arranged in hubs of rear driving wheels, and the motors directly drive the rear wheels to drive the electric wheel to run. All power sources on board come from diesel engines. The power transmission type is as follows: the output shaft of the diesel engine is connected with the input shaft of the generator, the output shaft of the generator is provided with a ventilator, and then the output of the ventilator drives the hydraulic pump through the universal shaft.
A ventilator is a complete device of an electric drive system for providing cooling air to a generator, two motors and a frequency converter. The ventilator wind path is of a one-inlet three-outlet type, namely a main air inlet, an inlet at the top of the vehicle platform, three air outlets, an air outlet for cooling the generator, an air outlet for cooling the frequency converter (positioned on the vehicle platform) and an air outlet for cooling two traction motors of the rear wheel. The fan is centrifugal and mainly comprises an impeller, a volute and the like.
The electric wheel dump truck is widely applied to construction sites such as mines, hydraulic engineering and the like, at present, the electric transmission system of the electric wheel dump truck mostly adopts GE equipment, and domestic electric wheel dump trucks also adopt GE complete equipment.
In recent decades, with the development of infrastructure construction of various industries of national economy in China, particularly the rapid development of infrastructure industries such as mines, water conservancy, railways and the like, the electric wheel type dump truck has great market demand, and a key power device, namely an electric transmission system, of the vehicle is monopolized by several large foreign companies, so that the equipment bears great cost pressure and the problem of equipment maintenance guarantee in China.
Aiming at the characteristics and the use requirements of the product, a method of combining theoretical analysis, numerical simulation and experimental research is adopted, and finally, the ventilator meeting the requirements of pressure and flow of the three air outlets is invented through experimental debugging.
Disclosure of Invention
The utility model discloses a for solving internal electric wheel for dump truck ventilation blower, to the characteristics of this product and design operation requirement adopt a novel structural style, it possesses large-traffic, compact structure, convenient to use, easy operation, adaptability wide, easily extensive popularization and application's characteristics.
The purpose of the utility model is realized like this: the air inlet volute is provided with an inlet at the upper end, the air inlet volute is provided with a forward air outlet at the lower part, the air outlet volute is provided with a backward air outlet at the upper part, and the air outlet volute is provided with an upward air outlet at the upper end.
The utility model discloses still include such structural feature:
1. the fan rotor of the impeller tailstock is of a cantilever structure, a radial outlet type impeller is adopted, the impeller is assembled on a bushing, and the bushing is installed on a motor shaft through a key.
2. The air inlet volute and the air exhaust volute are of thin-wall structures and made of ZL101 materials.
Compared with the prior art, the beneficial effects of the utility model are that: 1. the high-efficiency ventilator for the traditional electric wheel dumper is a matched device of an electric transmission system and is used for providing cooling air for a generator, two motors and a frequency converter. The ventilator wind path is of a one-inlet three-outlet type, namely a main air inlet, an inlet at the top of the vehicle platform, three air outlets, an air outlet for cooling the generator, an air outlet for cooling the frequency converter (positioned on the vehicle platform) and an air outlet for cooling two traction motors of the rear wheel. The fan is centrifugal and mainly comprises an impeller, a volute and the like. Aiming at the characteristics and design and use requirements of the product, a method combining theoretical analysis, numerical simulation and experimental research is adopted, and finally, the ventilator meeting the requirements of pressure and flow of three air outlets is invented through experimental debugging. The novel structure is adopted according to the characteristics and design and use requirements of the product, and the novel structure has the characteristics of large flow, compact structure, convenience in use, simplicity in operation, wide adaptability and easiness in large-scale popularization and application.
2. The design parameters of the ventilator for the electric wheel dump truck are as follows:
conveying a medium: air;
rated inlet temperature: 27 ℃, temperature variation range: -40 ℃ to +40 ℃;
rated rotation speed: 2000r/min, rotating speed variation range: 1350-2100 r/min, and allowing overspeed to 2300 r/min;
air volume: the air volume is not less than 25000m3/h under the rated working condition, wherein the cooling air volume led to the traction motor is not less than 13680m3H, cooling air volume to the generator is not less than 10800m3/h；
Full pressure of a fan: 2000 Pa;
the overall dimension of the fan is as follows: phi 1200mm is multiplied by 450 mm;
3. the ventilator rotor is in a cantilever structure and adopts a radial outlet type impeller. The impeller is fitted on a bushing which is keyed to the motor shaft. The diameter of the inlet of the impeller is 220mm, the diameter of the outlet of the impeller is 800mm, and the number of the blades is 19.
4. The wheel disc and the blades are made of ZL104 materials; the outlet of the ventilator adopts a logarithmic spiral radial outlet type exhaust volute, the structures of the air inlet volute and the exhaust volute are both complex thin-wall structures, the casting performance is poor, and the housing is made of ZL101 materials.
5. The utility model discloses can be applied to a ventilation blower that electronic round of tipper used, also can be applied to the compressor ventilation blower field that has special requirements simultaneously, its application mainly includes aspects such as military affairs, energy, electric power, traffic, environmental protection.
Drawings
FIG. 1 is a block diagram of a drive train installation;
fig. 2 is a schematic structural diagram of the present invention;
fig. 3 is a schematic size diagram of the present invention;
fig. 4 is a schematic size view of a blade according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
With reference to fig. 2-3, the main structure of the fan of the present invention is as follows:
the fan is a single-stage centrifugal fan and consists of three parts, namely an air inlet volute 1, an impeller 2 and an exhaust volute 3. Has a vertically downward air inlet 4, two air outlets 5 and 6 in tandem and an upper air outlet 7. Because of the limitation of the axial size, the air inlet is narrow and long, and the length and the width are large. A forward air outlet 5 is arranged at the lower part of the air inlet volute and used for providing cooling air for the generator. A backward air outlet 6 is arranged at the upper part of the exhaust volute and used for providing cooling air for the traction motor. An upward air outlet 7 is arranged at the upper end of the exhaust volute and used for providing cooling air for the frequency converter. The fan rotor is in a cantilever structure and adopts a radial outlet type impeller. The impeller is fitted on a bushing which is keyed to the motor shaft. The utility model is provided with three outlets, and the design matching of the flow is realized at different air volumes and different positions according to the air volume design of the three outlets, so that the flow is matched according to the design requirement, and then the whole fan is subjected to special structural design according to the exhaust volute; according to different flow requirements, area conversion is carried out, different flows are obtained according to air volume and air pressure, and the flows meet the design requirements.
With reference to fig. 4, the main structural parameters of the impeller are as follows: impeller inlet hub radius R1H is 140mm, and the radius R of the impeller inlet1T is 255mm and the radius R of the outlet of the impeller2400mm, 19 blades and impeller blade outlet width B270mm, the clearance Tip is 4mm, and the axial length of the impeller is 180 mm.
The impeller of the fan is designed into a radial outlet type centrifugal impeller, the flow in the impeller is uniform, large vortex and backflow do not occur, and the pressure at the outlet of the impeller meets the requirement.
The outlet of the centrifugal compressor (ventilator) adopts a logarithmic spiral radial outlet type exhaust volute, airflow uniformly decelerates and expands along the circumferential direction and finally flows out along the radial direction, the flow is uniform and smooth, and the loss is small. The fan adopts two axial outlets in tandem due to the structural consideration, and airflow basically has no diffusion in the circumferential direction.
Because this fan rotational speed is lower, and the circumferential speed is less, and fan rotor is cantilever structure, and rotor mass should be as little as possible, consequently rim plate and blade select for use ZL104 material. The maximum allowable stress delta b of the material is 145Mpa, the impeller has higher strength safety margin, and the impeller structural scheme can meet the strength use requirement. The structural scheme of the impeller also has higher vibration safety margin because the working rotating speed of the impeller is 2000r/min (33.3 Hz).
Because the air inlet volute and the air exhaust volute of the fan are both complex thin-wall structures, the casting performance is poor, and the quality of the air inlet volute and the air exhaust volute is required to be as small as possible, the shell is made of ZL101 materials.
Claims (3)
1. The utility model provides an electronic round of high-efficient ventilation blower for dump truck which characterized in that: the air inlet volute is provided with an inlet at the upper end, the air inlet volute is provided with a forward air outlet at the lower part, the air outlet volute is provided with a backward air outlet at the upper part, and the air outlet volute is provided with an upward air outlet at the upper end.
2. The efficient ventilator of claim 1, wherein: the fan rotor of the impeller tailstock is of a cantilever structure, a radial outlet type impeller is adopted, the impeller is assembled on a bushing, and the bushing is installed on a motor shaft through a key.
3. The highly efficient ventilator for the electric wheel dump truck according to claim 1 or 2, wherein: the air inlet volute and the air exhaust volute are of thin-wall structures and made of ZL101 materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022346374.2U CN214146019U (en) | 2020-10-21 | 2020-10-21 | Efficient ventilator for electric wheel dump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022346374.2U CN214146019U (en) | 2020-10-21 | 2020-10-21 | Efficient ventilator for electric wheel dump truck |
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| CN214146019U true CN214146019U (en) | 2021-09-07 |
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| CN202022346374.2U Active CN214146019U (en) | 2020-10-21 | 2020-10-21 | Efficient ventilator for electric wheel dump truck |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810668A (en) * | 2022-03-17 | 2022-07-29 | 哈尔滨工业大学 | Turbine and breathing machine |
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2020
- 2020-10-21 CN CN202022346374.2U patent/CN214146019U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810668A (en) * | 2022-03-17 | 2022-07-29 | 哈尔滨工业大学 | Turbine and breathing machine |
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