CN108799179B - Test device and test method for induced draft motor adjusting mechanism - Google Patents
Test device and test method for induced draft motor adjusting mechanism Download PDFInfo
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- CN108799179B CN108799179B CN201810818035.4A CN201810818035A CN108799179B CN 108799179 B CN108799179 B CN 108799179B CN 201810818035 A CN201810818035 A CN 201810818035A CN 108799179 B CN108799179 B CN 108799179B
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- 238000012360 testing method Methods 0.000 title claims abstract description 54
- 230000007246 mechanism Effects 0.000 title claims abstract description 49
- 238000010998 test method Methods 0.000 title claims abstract description 12
- 238000009826 distribution Methods 0.000 claims abstract description 22
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 230000009471 action Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to a dynamic fluid machine, in particular to a test device and a test method of an induced draft motor-driven regulating mechanism, wherein the induced draft motor-driven regulating mechanism is arranged on a test bed; the piston shaft of the dynamic adjustment hydraulic cylinder is connected with the journal of the radial bearing through a main shaft flange and a rotating tray, and the bearing seat of the radial bearing is fixed in the counter bore of the panel of the test bed; the gap between the distributing cylinder and the lower end of the piston shaft is sealed; the flow distribution cylinder is also provided with three oil ports, and the two oil path holes are respectively communicated with an upper cavity and a lower cavity in a cylinder barrel of the dynamic adjustment hydraulic cylinder to supply oil and discharge oil for the dynamic adjustment hydraulic cylinder. The test device and the test method of the induced draft maneuvering adjusting mechanism can realize that the induced draft maneuvering adjusting mechanism can complete axial movement while rotating at a high speed, can better simulate actual working conditions, can complete test requirements, and can achieve the test purpose.
Description
Technical Field
The invention relates to a dynamic fluid machine, in particular to a test device and a test method of a wind turbine dynamic adjustment mechanism.
Background
The induced draft fan is one of the most important auxiliary equipment of the boiler of the thermal power plant, and is driven fluid machinery. The device mainly relies on mechanical energy to increase the pressure of the gas and discharge the gas so as to achieve the purpose of ventilation and induced draft. In recent years, an axial flow type induced draft fan mainly adopting a hydraulic cylinder mode is widely adopted in large thermal power generating units. The fan adjusting characteristic curve is changed by changing the blade angle through a hydraulic system. The processing and manufacturing precision requirement is higher, the structure is relatively complex, but the device has the characteristics of sensitive adjustment, low power consumption, high operation efficiency and the like. The running wear and vibration of the fan are reduced to a certain extent. Therefore, the regulation mode mainly comprising hydraulic regulation is the development direction of the control of the induced draft fan in the future, but in the actual operation of the thermal power plant, the induced draft fan is in a long-term continuous working state, the operation environment is bad, the failure rate is high, and the failure of the moving blade regulating device is one of the common failures of the axial flow induced draft fan.
The axial flow induced draft fan is used for shifting the performance curve (a series of working points) of the fan by adjusting the installation angle of the moving blades. Changing the installation angle of the movable blade is carried out by a movable blade adjusting mechanism, the performance curve is related to different installation angles of the movable blade and the performance curve of the air duct, and if the flow and the pressure head are required to be increased, the installation angle of the movable blade is only required to be increased; otherwise, only the installation angle of the movable blade is required to be reduced. Before the movable adjustment mechanism leaves the factory, a test needs to be performed, the actual working condition is simulated, and after the actual requirement is met, the movable adjustment mechanism can leave the factory to enter a field installation link.
Disclosure of Invention
In order to solve the technical problems, the invention provides a test device and a test method of a wind turbine movable adjusting mechanism, and in industrial production, the device can realize that the wind turbine movable adjusting mechanism can complete axial movement while rotating at a high speed, can better simulate actual working conditions, can complete test requirements, and can achieve the test purpose. The test device and the test method of the induced draft motor-driven adjusting mechanism have the characteristics of quick response, high reliability, simplicity in assembly, economy, practicability and the like.
The test device of the induced draft maneuver adjusting mechanism comprises a test bed, wherein the test bed is provided with the induced draft maneuver adjusting mechanism, a motor fixing frame is arranged above the induced draft maneuver adjusting mechanism, and a motor is arranged on the motor fixing frame and is connected with the induced draft maneuver adjusting mechanism;
The induced draft motor-driven adjusting mechanism comprises a moving adjusting hydraulic cylinder and a flow distribution cylinder, wherein the moving adjusting hydraulic cylinder comprises a cylinder barrel, a piston and a piston shaft are arranged in the cylinder barrel, the piston is fixedly connected with the upper end of the piston shaft, the cylinder barrel of the moving adjusting hydraulic cylinder moves up and down on the piston, and the axial position of the piston is fixed; the cylinder cavity is divided into an upper cavity and a lower cavity by the piston;
The test bed comprises a panel, a table post and a base plate; the base plate is flatly paved on the ground; the lower end of the table post is connected with the base plate, and the upper end is connected with the panel; a counter bore is formed in the center of the panel, a radial bearing is arranged in the counter bore, and a flow distribution cylinder of the induced draft motor-driven adjusting mechanism penetrates through the radial bearing;
The output shaft of the motor is connected with the large rotary drum through a key block and drives the large rotary drum to rotate along the self axis, and the large rotary drum is fixedly connected with the cylinder barrel of the dynamic adjustment hydraulic cylinder through the flange plate axis; a main shaft flange is arranged on the coaxial line of the piston shaft of the dynamic adjusting hydraulic cylinder, the main shaft flange is fixedly connected with the coaxial line of the rotating tray, the rotating tray is in interference fit with the journal of the radial bearing, and the bearing seat of the radial bearing is fixed in the counter bore of the panel of the test bed; the piston and the piston shaft in the dynamic adjustment hydraulic cylinder rotate together with the cylinder barrel;
The gap between the flow distribution cylinder and the lower end of the piston shaft of the movable hydraulic cylinder is sealed, and the flow distribution cylinder does not rotate along with the piston shaft; the cylinder is also provided with three oil ports, namely an oil port A, an oil port B and an oil discharge port P, wherein the oil port A and the oil port B are respectively connected with two oil path holes in the piston shaft, the two oil path holes are respectively communicated with an upper cavity and a lower cavity in a cylinder barrel of the dynamic adjustment hydraulic cylinder, and are respectively an upper rodless cavity and a lower rod cavity for supplying oil and discharging oil for the dynamic adjustment hydraulic cylinder.
Further, the motor fixing frame comprises a cylindrical hollow barrel, an anti-rotation guide rod and a bracket; the cylindrical hollow cylinder is sleeved outside the motor, and two sides of the cylindrical hollow cylinder are provided with closed guide grooves; the cylindrical hollow cylinder is suspended and fixed through four brackets, one end of each bracket is fixed with the cylindrical hollow cylinder, and the other end of each bracket is fixed on a panel of the test bed; one end of the anti-rotation guide rod is fixed with the motor shell, and the other end of the anti-rotation guide rod penetrates through the guide groove to fix the motor shell.
The test method of the test device of the induced draft motor-driven regulating mechanism comprises the steps that the induced draft motor-driven regulating mechanism is arranged on the test device, and a motor drives a cylinder barrel of a dynamic regulating hydraulic cylinder of the induced draft motor-driven regulating mechanism to rotate through a cylindrical hollow cylinder; the piston and the piston shaft of the dynamic adjustment hydraulic cylinder rotate together with the cylinder barrel; step-by-step speed regulation is carried out until the rotating speed required by the actual working condition is reached; after the rotation is stable, the servo valve is controlled to supply high-pressure oil to the oil port A of the flow distribution cylinder, and the high-pressure oil enters a rodless cavity of the dynamic adjustment hydraulic cylinder through an oil way hole in the piston shaft; the piston is integrated with the piston shaft, the piston shaft is fixed on a panel of the test bed, the piston cannot move up and down, and the cylinder barrel of the dynamic adjustment hydraulic cylinder extends upwards under the action of high-pressure oil; the motor moves upwards in the cylindrical hollow cylinder along with the cylinder barrel of the movable hydraulic cylinder under the action of the anti-rotation guide rod;
When the cylinder barrel of the movable hydraulic cylinder extends to the highest position, high-pressure oil is supplied to the oil port B of the flow distribution cylinder by controlling the servo valve, and the high-pressure oil enters a rod cavity of the movable hydraulic cylinder through an oil way hole on the piston shaft; under the action of high-pressure oil, the cylinder barrel of the dynamic adjusting hydraulic cylinder moves downwards; checking whether oil leakage exists or not, whether mechanical faults exist or not and recording various performance indexes of the induced draft motor adjusting mechanism in the test process, and finishing test results.
The invention has the beneficial effects that:
1. The test device and the test method of the induced draft motor-driven adjusting mechanism can simulate the working condition that the induced draft motor-driven adjusting mechanism rotates at a high speed in actual application and simultaneously can axially move, and provide quality guarantee for products before delivery; the test device has the advantages of simple structure, improved reliability and low cost, and is beneficial to market popularization;
2. The design of the motor fixing frame changes the common fixing mode of the motor; the cylindrical hollow cylinder is supported by the bracket, the motor is placed in the cylindrical hollow cylinder, and the anti-rotation guide rod is connected between the motor shell and the frame, so that the radial position of the motor is relatively fixed, but the motor can move up and down; thereby realizing the working condition requirement that the induced draft motor-driven adjusting mechanism can axially move while rotating at high speed;
3. The radial bearing is arranged on the test stand, so that the journal of the bearing is connected with the rotating tray through interference fit, and the main shaft flange on the piston shaft of the dynamic adjusting hydraulic cylinder is connected with the rotating tray through bolts; the bearing seat of the radial bearing is fixed in a counter bore of the test bed panel; through the structure, the whole movable adjusting mechanism can be supported, the piston and the piston shaft in the movable adjusting hydraulic cylinder can rotate along with the cylinder barrel, and the aim of separating the rotating part (the cylinder barrel, the plug and the piston shaft of the movable adjusting hydraulic cylinder) from the non-rotating part (the flow distribution cylinder) can be achieved.
Drawings
FIG. 1 is a schematic view of a test apparatus according to the present invention
Detailed Description
Specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the test device of the induced draft motor adjustment mechanism is characterized in that: the device comprises a test bed 11, wherein an induced air motor-driven regulating mechanism is arranged on the test bed 11, a motor fixing frame is arranged above the induced air motor-driven regulating mechanism, and a motor 3 is arranged on the motor fixing frame and is connected with the induced air motor-driven regulating mechanism;
The induced draft motor-driven adjusting mechanism comprises a moving adjusting hydraulic cylinder and a flow distribution cylinder body 10, wherein the moving adjusting hydraulic cylinder comprises a cylinder barrel, a piston 7 and a piston shaft 12 are arranged in the cylinder barrel, the upper ends of the piston 7 and the piston shaft 12 are fixedly connected, the cylinder barrel of the moving adjusting hydraulic cylinder moves up and down on the piston 7, and the axial position of the piston 7 is fixed; the cylinder cavity is divided into an upper cavity and a lower cavity by a piston 7;
the test bed 11 comprises a panel, a table column and a base plate; the base plate is flatly paved on the ground; the lower end of the table post is connected with the base plate, and the upper end is connected with the panel; a counter bore is formed in the center of the panel, a radial bearing 9 is arranged in the counter bore, and a flow distribution cylinder 10 of the induced draft motor-driven adjusting mechanism penetrates through the radial bearing 9;
An output shaft of the motor 3 is connected with the large rotary drum 5 through a key block and drives the large rotary drum 5 to rotate along the axis of the motor, and the large rotary drum 5 is fixedly connected with a cylinder barrel of the dynamic adjustment hydraulic cylinder through the axis of a flange 6; a main shaft flange 13 is arranged on the piston shaft 12 of the dynamic adjusting hydraulic cylinder on the same axis, the main shaft flange 13 is fixedly connected with the rotating tray 8 on the same axis, the rotating tray 8 is in interference fit with a journal 91 of a radial bearing 9, and a bearing seat 92 of the radial bearing 9 is fixed in a counter bore of a panel of the test bench 11; the piston 7 and the piston shaft 12 in the dynamic adjusting hydraulic cylinder rotate together with the cylinder barrel;
When the motor 3 rotates, the output shaft of the motor 3 drives the large rotary drum 5 to rotate together, and the large rotary drum 5 is connected with the cylinder barrel of the dynamic adjusting hydraulic cylinder through bolts, so that the cylinder barrel is driven to rotate together; the piston shaft 12 of the dynamic adjusting hydraulic cylinder is in interference fit with the journal 91 of the radial bearing 9 through the main shaft flange 13 and the rotating tray 8, so that the piston 7 and the piston shaft 12 in the dynamic adjusting hydraulic cylinder can rotate together with the cylinder barrel. The test device and the test method can meet the working condition that the cylinder barrel, the piston and the piston shaft of the dynamic adjustment hydraulic cylinder of the induced draft dynamic adjustment mechanism rotate together.
The gap between the flow distribution cylinder 10 and the lower end of the piston shaft 12 of the dynamic adjustment hydraulic cylinder is sealed, and the flow distribution cylinder 10 does not rotate along with the piston shaft 12; the flow distribution cylinder 10 is also provided with three oil ports, namely an oil port A, an oil port B and an oil discharge port P, wherein the oil port A and the oil port B are respectively connected with two oil path holes in the piston shaft 12, the two oil path holes are respectively communicated with an upper cavity and a lower cavity in a cylinder barrel of the dynamic adjustment hydraulic cylinder, and are respectively an upper rodless cavity and a lower rod cavity for supplying oil and discharging oil for the dynamic adjustment hydraulic cylinder;
The motor fixing frame comprises a cylindrical hollow barrel 1, an anti-rotation guide rod 2 and a bracket 4; the cylindrical hollow cylinder 1 is sleeved outside the motor 3, and two sides of the cylindrical hollow cylinder are provided with closed guide grooves; the cylindrical hollow cylinder 1 is suspended and fixed through four brackets 4, one end of each bracket 4 is fixed with the cylindrical hollow cylinder 1, and the other end is fixed on a panel of the test bed 11; one end of the anti-rotation guide rod 2 is fixed with the motor 3 shell, and the other end passes through the guide groove to fix the motor shell, so that the motor shell is prevented from rotating together when the rotating shaft of the motor 3 rotates, and meanwhile, the motor 3 can move up and down together when the movable hydraulic cylinder stretches up and down.
According to the test method of the test device of the induced draft motor-driven regulating mechanism, the induced draft motor-driven regulating mechanism is arranged on the test device, and the motor 3 drives the cylinder barrel of the induced draft motor-driven regulating mechanism to rotate through the cylindrical hollow barrel 1; the piston 7 and the piston shaft 12 of the dynamic adjusting hydraulic cylinder rotate together with the cylinder barrel; step-by-step speed regulation is carried out until the rotating speed required by the actual working condition is reached; after the rotation is stable, the servo valve is controlled to supply high-pressure oil to the oil port A of the flow distribution cylinder 10, and the high-pressure oil enters a rodless cavity of the dynamic adjustment hydraulic cylinder through an oil way hole in the piston shaft 12; the piston 7 is integrated with the piston shaft 12, the piston shaft 12 is fixed on a panel of the test bench 11, the piston 7 cannot move up and down, and the cylinder barrel of the dynamic adjustment hydraulic cylinder extends upwards under the action of high-pressure oil; the motor 3 moves upwards in the cylindrical hollow cylinder 1 along with the cylinder barrel of the movable hydraulic cylinder under the action of the anti-rotation guide rod 2;
When the cylinder barrel of the dynamic adjusting hydraulic cylinder extends to the highest position, high-pressure oil is supplied to the oil port B of the flow distribution cylinder 10 by controlling the servo valve, and the high-pressure oil enters a rod cavity of the dynamic adjusting hydraulic cylinder through an oil path hole on the piston shaft 12; under the action of high-pressure oil, the cylinder barrel of the dynamic adjusting hydraulic cylinder moves downwards; checking whether oil leakage exists or not, whether mechanical faults exist or not and recording various performance indexes of the induced draft motor adjusting mechanism in the test process, and finishing test results.
Claims (1)
1. The test method of the test device of the induced draft motor-driven adjusting mechanism is characterized in that the test device of the induced draft motor-driven adjusting mechanism is adopted;
The induced draft motor-driven adjusting mechanism comprises a motor-driven adjusting hydraulic cylinder and a flow distribution cylinder (10), wherein the motor-driven adjusting hydraulic cylinder comprises a cylinder barrel, a piston (7) and a piston shaft (12) are arranged in the cylinder barrel, the upper ends of the piston (7) and the piston shaft (12) are fixedly connected, the cylinder barrel of the motor-driven adjusting hydraulic cylinder moves up and down on the piston (7), and the axial position of the piston (7) is fixed; the cylinder cavity is divided into an upper cavity and a lower cavity by a piston (7);
The test device of the induced draft motor-driven regulating mechanism comprises a test bed (11), wherein the induced draft motor-driven regulating mechanism is arranged on the test bed (11), a motor fixing frame is arranged above the induced draft motor-driven regulating mechanism, and a motor (3) is arranged on the motor fixing frame and connected with the induced draft motor-driven regulating mechanism;
The test bed (11) comprises a panel, a column and a base plate; the base plate is flatly paved on the ground; the lower end of the table post is connected with the base plate, and the upper end is connected with the panel; a counter bore is formed in the center of the panel, a radial bearing (9) is arranged in the counter bore, and a flow distribution cylinder (10) of the induced draft motor-driven adjusting mechanism penetrates through the radial bearing (9);
An output shaft of the motor (3) is connected with the large rotary drum (5) through a key block and drives the large rotary drum (5) to rotate along the self axis, and the large rotary drum (5) is fixedly connected with a cylinder barrel of the dynamic adjustment hydraulic cylinder through the coaxial axis of the flange plate (6); a main shaft flange (13) is arranged on a piston shaft (12) of the dynamic adjusting hydraulic cylinder, the main shaft flange (13) is fixedly connected with the coaxial line of the rotary tray (8), the rotary tray (8) is in interference fit with a shaft neck (91) of the radial bearing (9), and a bearing seat (92) of the radial bearing (9) is fixed in a counter bore of a panel of the test bed (11); a piston (7) and a piston shaft (12) in the dynamic adjustment hydraulic cylinder rotate together with the cylinder barrel;
The gap between the flow distribution cylinder (10) and the lower end of the piston shaft (12) of the dynamic adjustment hydraulic cylinder is sealed, and the flow distribution cylinder (10) does not rotate along with the piston shaft (12); the flow distribution cylinder (10) is also provided with three oil ports, namely an oil port A, an oil port B and an oil discharge port P, wherein the oil port A and the oil port B are respectively connected with two oil circuit holes in the piston shaft (12), the two oil circuit holes are respectively communicated with an upper cavity and a lower cavity in a cylinder barrel of the dynamic adjustment hydraulic cylinder, and are respectively an upper rodless cavity and a lower rod cavity for supplying oil and discharging oil for the dynamic adjustment hydraulic cylinder;
The motor fixing frame comprises a cylindrical hollow barrel (1), an anti-rotation guide rod (2) and a bracket (4); the cylindrical hollow cylinder (1) is sleeved outside the motor (3), and both sides of the cylindrical hollow cylinder are provided with closed guide grooves; the cylindrical hollow cylinder (1) is suspended and fixed through four brackets (4), one end of each bracket (4) is fixed with the cylindrical hollow cylinder (1), and the other end of each bracket is fixed on a panel of the test bed (11); one end of the anti-rotation guide rod (2) is fixed with the motor (3) shell, and the other end passes through the guide groove to fix the motor shell;
The method comprises the following steps:
The induced draft motor-driven regulating mechanism is arranged on a test device, and a motor (3) drives a cylinder barrel of a hydraulic cylinder of the induced draft motor-driven regulating mechanism to rotate through a cylindrical hollow cylinder (1); the piston (7) and the piston shaft (12) of the dynamic adjusting hydraulic cylinder rotate together with the cylinder barrel; step-by-step speed regulation is carried out until the rotating speed required by the actual working condition is reached; after the rotation is stable, the servo valve is controlled to supply high-pressure oil to the oil port A of the flow distribution cylinder (10), and the high-pressure oil enters a rodless cavity of the dynamic adjustment hydraulic cylinder through an oil way hole in the piston shaft (12); the piston (7) is integrated with the piston shaft (12), the piston shaft (12) is fixed on a panel of the test bench (11), the piston (7) cannot move up and down, and the cylinder barrel of the dynamic adjusting hydraulic cylinder extends upwards under the action of high-pressure oil; the motor (3) moves upwards along with the cylinder barrel of the dynamic adjusting hydraulic cylinder;
when the cylinder barrel of the dynamic adjustment hydraulic cylinder extends to the highest position, high-pressure oil is supplied to an oil port B of the flow distribution cylinder (10) through a control servo valve, and the high-pressure oil enters a rod cavity of the dynamic adjustment hydraulic cylinder through an oil path hole on a piston shaft (12); under the action of high-pressure oil, the cylinder barrel of the dynamic adjusting hydraulic cylinder moves downwards; checking whether oil leakage exists or not, whether mechanical faults exist or not and recording various performance indexes of the induced draft motor adjusting mechanism in the test process, and finishing test results.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810818035.4A CN108799179B (en) | 2018-07-24 | 2018-07-24 | Test device and test method for induced draft motor adjusting mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810818035.4A CN108799179B (en) | 2018-07-24 | 2018-07-24 | Test device and test method for induced draft motor adjusting mechanism |
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| Publication Number | Publication Date |
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| CN108799179A CN108799179A (en) | 2018-11-13 |
| CN108799179B true CN108799179B (en) | 2024-05-03 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6481388B1 (en) * | 1999-04-22 | 2002-11-19 | Komatsu Ltd. | Cooling fan drive control device |
| CN204386932U (en) * | 2015-01-07 | 2015-06-10 | 黄正堃 | Axial-flow blower adjusting rotor blade device |
| CN107762972A (en) * | 2017-12-05 | 2018-03-06 | 武汉思亘远电控设备有限公司 | A kind of self-saturation type axle induced-draft fan movable vane piece adjustment mechanism and its method of work |
| CN207513879U (en) * | 2017-10-09 | 2018-06-19 | 诺文科风机(北京)有限公司 | A kind of ventilating system for adjusting fan improvement mining counter rotating wind turbine is moved with external motor type |
| CN207598578U (en) * | 2017-12-05 | 2018-07-10 | 武汉思亘远电控设备有限公司 | A kind of self-saturation type axle induced-draft fan movable vane piece adjustment mechanism |
-
2018
- 2018-07-24 CN CN201810818035.4A patent/CN108799179B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6481388B1 (en) * | 1999-04-22 | 2002-11-19 | Komatsu Ltd. | Cooling fan drive control device |
| CN204386932U (en) * | 2015-01-07 | 2015-06-10 | 黄正堃 | Axial-flow blower adjusting rotor blade device |
| CN207513879U (en) * | 2017-10-09 | 2018-06-19 | 诺文科风机(北京)有限公司 | A kind of ventilating system for adjusting fan improvement mining counter rotating wind turbine is moved with external motor type |
| CN107762972A (en) * | 2017-12-05 | 2018-03-06 | 武汉思亘远电控设备有限公司 | A kind of self-saturation type axle induced-draft fan movable vane piece adjustment mechanism and its method of work |
| CN207598578U (en) * | 2017-12-05 | 2018-07-10 | 武汉思亘远电控设备有限公司 | A kind of self-saturation type axle induced-draft fan movable vane piece adjustment mechanism |
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| CN108799179A (en) | 2018-11-13 |
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