CN114337169B - Long shaft extension three-phase asynchronous motor of aviation brake system - Google Patents
Long shaft extension three-phase asynchronous motor of aviation brake system Download PDFInfo
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- CN114337169B CN114337169B CN202111522818.6A CN202111522818A CN114337169B CN 114337169 B CN114337169 B CN 114337169B CN 202111522818 A CN202111522818 A CN 202111522818A CN 114337169 B CN114337169 B CN 114337169B
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- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 238000009434 installation Methods 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims description 13
- 230000002441 reversible effect Effects 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 7
- 238000012806 monitoring device Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The application belongs to the field of motor design, and in particular relates to an aviation brake system long shaft extension three-phase asynchronous motor. Including stator (1), rotor (2), shell and end cover subassembly (4), end cover subassembly (4) are close to brake disc (23) that are located shaft one end, and the pivot of rotor (2) is deviating from the one end of end cover subassembly (4) is outside to extend to the three-phase asynchronous motor and is formed the extension, form installation space between the shaft inner wall of extension and aviation aircraft wheel, install the monitoring facilities of control aviation aircraft wheel in the installation space, the extension end stretches out from the other end of shaft to install fan (14) at this extension end. The motor adopts a long shaft extending structure design, fully utilizes the wheel axle space, reduces the whole volume and weight of the system, and obviously optimizes and improves the service life, cost and working reliability of the brake disc.
Description
Technical Field
The application belongs to the field of motor design, and in particular relates to an aviation brake system long shaft extension three-phase asynchronous motor.
Background
Currently, in an aviation brake system, a brake disc of the aviation brake system does not adopt effective blowing cooling measures. The aviation brake system needs to meet the requirements of long service life, simple structure and the like. In the past aviation brake system, the three-phase asynchronous motor for radiating heat by adopting a special brake disc and a cooling fan driven by the special brake disc or the cooling fan driven by a permanent magnet motor are used for radiating heat of the brake disc, so that the following problems exist:
1. the service life is short, because the brake disc heat dissipation device is not designed in the brake system of part of the aviation aircraft, the aircraft is required to brake in order to keep the speed stable in the take-off or landing process, the brake disc and the friction device generate more heat in the brake process, if the heat is not timely dissipated, the temperature is too high, the unrecoverable damage to the brake disc material can be caused at high temperature, the service life of the brake disc can be greatly reduced, the cost of the brake disc of the aircraft is higher, the use and maintenance cost of the aircraft is increased, if the effective brake disc heat dissipation device is designed in the brake system, the heat generated in the brake process is timely dissipated, the brake disc is protected from being damaged by high temperature, and the service life of the brake disc is prolonged.
2. When the cooling fan is driven by the permanent magnet motor to radiate heat of the brake disc, the motor structure is further simplified in order to obtain smaller motor volume, the permanent magnet motor cancels the traditional structure of an electric brush, a commutator and the like, adopts an electronic commutation principle to realize brushless and simplifies the structure, but the motor also needs to be provided with a corresponding motor driver, and a sensor (a Hall integrated circuit or a rotary transformer) for collecting the position of a rotor is also arranged in the motor body, so that the structure is more complex.
3. The starting control is complicated, and the permanent magnet motor is generally classified into a position sensor system and a position sensor-less system. In the starting stage of the motor, a driver needs to generate a pulse square wave power supply which is conducted according to a certain sequence, and meanwhile receives a position sensor signal and a forward and reverse rotation signal and is used for controlling the on-off of each power tube of an inverter bridge to generate continuous torque so as to finish starting. Permanent magnet motor systems without position sensors typically employ a three-segment starting scheme based on load characteristics. The three-stage starting method is to start the motor by accelerating the brushless DC motor from rest according to the running state of the synchronous motor controlled by the controller until the rotating speed is large enough and then switching to the non-position state. This process includes three phases of rotor positioning, acceleration and operating state switching.
4. The reliability is poor, the permanent magnet motor system with the position sensor is arranged, and the motor body usually comprises a Hall integrated circuit, position sensor magnetic steel, a permanent magnet rotor, an armature stator and the like; the driver comprises a power module, a control module and the like. The system contains more modules and components, any module and component fails, and the function of the whole motor system is invalid. The permanent magnet motor system without the position sensor has the advantages that the motor body structure is simpler, and only the permanent magnet rotor and the armature stator are arranged; the driver comprises a power module, a power driving power module, a control template and a complex software system for resolving the position of the rotor, wherein the system comprises more modules and links, any module component or software fails, and the functions of the whole motor system are invalid.
5. The cost is high, the permanent magnet motor of the aviation brake system, the motor body comprises permanent magnet materials with higher cost, a Hall integrated circuit and other sensors; the driver comprises a power conversion module, a power driving module, a control module and related software systems, and the application cost of the driver is high.
Disclosure of Invention
In order to solve the technical problem, the application provides the long-shaft extension three-phase asynchronous motor of the aviation brake system, which meets the requirements of long service life, simple structure and relatively low cost of the aviation brake system and is further popularized and applied.
This application aviation brake system major axis stretches three-phase asynchronous motor fixes in the shaft of aviation aircraft wheel inside, three-phase asynchronous motor includes stator, rotor, shell and end cover subassembly, and end cover subassembly is close to the brake disc that is located shaft one end, and the pivot of rotor is deviating from the outside extension of three-phase asynchronous motor of one end of end cover subassembly forms the extension section, form installation space between extension section and the shaft inner wall of aviation aircraft wheel, install the monitoring facilities of control aviation aircraft wheel in the installation space, the extension section end stretches out from the other end of shaft to at this extension shaft end install the fan, the extension section be close to the one end of fan with be provided with characteristic nut between the shaft inner wall, the characteristic nut outside is fixed on the supporting sleeve of shaft, and the inboard of characteristic nut is in through preventing swing bearing the shaft diameter department of extension section, be provided with on the shell of three-phase asynchronous motor along axial direction's bar groove, monitoring facilities's sensor lead-out wire passes through behind the bar groove, certainly three-phase asynchronous motor's end cover subassembly draws forth to the monitoring facilities on the machine.
Preferably, the monitoring device comprises a speed sensor and a tire pressure actuator.
Preferably, the fan is provided with a blade and a shaft hole, and the rotating hole is fixedly connected with the tail end of the extension section through a spline.
Preferably, a reverse screw nut is arranged at the outer side of the shaft hole of the fan, the fan is fastened through the reverse screw nut, the reverse screw nut is in threaded connection with the tail end of the extension section, and the screwing direction of the reverse screw nut is opposite to the rotation direction of the fan.
Preferably, the shell of the three-phase asynchronous motor is arranged on the supporting sleeve of the inner wall of the wheel shaft of the aircraft wheel in a matching mode of the notch and the bulge.
Preferably, a thermistor for acquiring a winding temperature signal is buried in a stator winding of the three-phase asynchronous motor, and the thermistor is connected with on-board monitoring equipment.
Preferably, a pressing member is provided on the end cover assembly, and the pressing member can press the sensor outgoing line.
Preferably, the fan has a fan housing outside the axle.
The motor adopts a long shaft extending structure design, fully utilizes the wheel axle space, reduces the whole volume and weight of the system, and obviously optimizes and improves the service life, cost and working reliability of the brake disc.
Drawings
Fig. 1 is a schematic structural view of a long shaft extension three-phase asynchronous motor of an aviation brake system of the application.
The device comprises a 1-stator, a 2-rotor, a 3-radial countersunk head screw, a 4-end cover assembly, a 5-elastic washer, a 6-flat pad, a 7-head safety hole screw, an 8-electric connector, a 9-cylindrical head screw, a 10-bearing, a 11-bearing retainer ring, a 12-bearing cover, a 13-countersunk head screw, a 14-fan, a 15-spline, a 16-characteristic nut, a 17-wheel shaft, a 18-supporting sleeve, a 19-speed sensor, a 20-tire pressure actuator, a 21-back wire nut, a 22-anti-swing bearing and a 23-brake disc.
Detailed Description
For the purposes, technical solutions and advantages of the present application, the following describes the technical solutions in the embodiments of the present application in more detail with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without undue burden are within the scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The application provides an aviation brake system major axis stretches three-phase asynchronous motor, as shown in fig. 1, three-phase asynchronous motor fixes in the shaft of aviation aircraft wheel inside, three-phase asynchronous motor includes stator 1, rotor 2, shell and end cover subassembly 4, and end cover subassembly 4 is close to the brake disc 23 that is located shaft one end, and rotor 2's pivot is deviating from the one end of end cover subassembly 4 extends to the three-phase asynchronous motor outside and forms the extension, form the installation space between the shaft inner wall of extension and aviation aircraft wheel, install the monitoring equipment of control aviation aircraft wheel in the installation space, the extension end stretches out from the other end of shaft to at this extension end of shaft install fan 14, the extension be close to fan 14 one end with be provided with characteristic nut 16 between the shaft inner wall, the characteristic nut 16 outside is fixed on the supporting sleeve 18 of shaft, and the inboard of characteristic nut 16 is in through preventing swing bearing 22 connection the diameter department of extension, be provided with the groove along axial direction on three-phase asynchronous motor's the shell, the sensor of equipment passes through behind the lead-out wire the groove of control equipment to the bar-shaped motor after the lead-out to the bar-shaped equipment of control aircraft wheel from the asynchronous motor 4.
The specific structure of the three-phase asynchronous motor is shown in fig. 1, the three-phase asynchronous motor comprises a motor main body on the right side and shaft extension on the left side, the motor main body comprises a stator 1 and a rotor 2, the rotor 2 is provided with a rotating shaft, the rotating shaft extends leftwards to form a longer shaft extension structure, the right end of the motor is sealed through an end cover assembly 4, the end cover assembly 4 is fixed on a motor shell through a head screw 7 with a safety hole, an elastic washer 5 and a flat pad 6 are arranged between the head screw 7 with the end cover assembly 4, the outside of the end cover assembly 4 is connected to an airborne power supply device through an electric connector and used for driving the three-phase asynchronous motor to rotate, the end cover assembly 4 is connected with the rotating shaft of the motor through a bearing 10, one side of the bearing is provided with a bearing retainer ring 11, the other identical bearing 10 is further arranged at the front end of the motor, the bearing 10 at the front end is sealed through a bearing cover 12, and the bearing cover 12 is fixed on the shell at the front end through a countersunk screw 13.
The motor has a longer shaft extension (about 225 mm) than the motor body by about 80mm (about 145 mm), and in order to reasonably utilize the internal space of the wheel shaft, the shaft extension part of the motor is provided with two parts of the tire pressure actuator 20 and the speed sensor 19, and other monitoring devices can be arranged in alternative embodiments. In a specific embodiment, even if the motor of the present application is not loaded, the tire pressure actuator 20 and the speed sensor 19 need to be installed in order to monitor the wheel shape, and the two monitoring devices are usually installed at the positions shown in fig. 1, so the present application installs the motor main body at the positions where the rear ends of the two monitoring devices are close to the brake disc 23, and extends to the front end of the wheel axle through a long shaft extension structure, and blows air to the brake disc and the motor through a fan to dissipate heat.
In order to prevent the motor from deflecting when rotating at high speed, the shaft extension of the embodiment is longer, and the swinging phenomenon can be generated along with the rotation of the motor, a swinging-preventing bearing is arranged at the shaft neck close to the fan, the inner circle of the bearing is in small clearance fit with the shaft neck, and the outer circle of the bearing is in interference fit with a characteristic nut fixed at the end part of the wheel shaft.
When the motor works, the thermistor for detecting the temperature of the winding can output the temperature signal of the stator winding to the upper computer of the system in real time as a resistance signal, and the thermistor is used for monitoring the temperature rise signal of the winding of the motor and timely cutting off the power supply under the condition of overhigh temperature rise so as to ensure the safety of the brake motor.
In some alternative embodiments, the fan 14 has blades and shaft holes, and the rotating holes are fixedly connected to the ends of the extension sections through splines 15.
In some alternative embodiments, a back-screw nut 21 is disposed outside the shaft hole of the fan 14, the fan 14 is fastened by the back-screw nut 21, the back-screw nut 21 is screwed to the end of the extension section, and the screwing direction of the back-screw nut 21 is opposite to the rotation direction of the fan 14.
In the above embodiment, the end of the extension shaft, that is, the shaft head portion, is connected to the load cooling fan by a flat key, and the end face of the shaft head is fixed by the counter-screw nut. In this embodiment, the fan is axially fixed by the counter-screw nut, and the fastening effect is more obvious as the motor rotates, so that system faults caused by loosening of the fan can be avoided.
In some alternative embodiments, the casing of the three-phase asynchronous motor is mounted on the supporting sleeve 18 of the inner wall of the wheel shaft of the aircraft wheel by means of the cooperation of the notch and the protrusion. In this embodiment, the motor body is fixed on the inner wall of the wheel axle 17, or the motor body can be fixed on the inner wall of the supporting sleeve 18, and the supporting sleeve 18 is of an annular structure sleeved on the inner wall of the wheel axle 17.
In some alternative embodiments, a thermistor for acquiring a winding temperature signal is embedded in a stator winding of the three-phase asynchronous motor, and the thermistor is connected with on-board monitoring equipment. The thermistor for collecting the temperature signal of the winding is buried in the stator winding of the motor, the temperature signal of the stator winding can be output to the upper computer of the system in real time through a resistance signal, and the thermistor is used for monitoring the temperature rise signal of the winding of the motor and timely cutting off the power supply under the condition of overhigh temperature rise, so that the safety of the motor is ensured
In some alternative embodiments, the end cap assembly 4 is provided with a pressing member capable of pressing the sensor lead-out wire. It can be appreciated that, because the sensor lead-out wire is led out to the outside in the bar-shaped groove on the motor housing, in order to avoid the direct contact of the lead-out wire with the wheel axle 17 or the supporting sleeve 18, avoid the fracture risk of the lead-out wire, the lead-out wire is straightened first, and then the lead-out wire is tightly pressed on the end cover assembly 4 through the pressing piece, thereby preventing the lead-out wire from shaking in the bar-shaped groove.
In some alternative embodiments, the fan 14 has a housing external to the axle for protecting the fan.
The application test of the three-phase asynchronous motor provided by the embodiment in the braking system of a certain machine shows that the service life, the cost and the working reliability of the braking disc of the braking system are obviously optimized and improved.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (4)
1. The three-phase asynchronous motor is characterized in that the three-phase asynchronous motor is fixed inside a wheel shaft of an aircraft wheel, the three-phase asynchronous motor comprises a stator (1), a rotor (2), a shell and an end cover assembly (4), the end cover assembly (4) is close to a brake disc (23) positioned at one end of the wheel shaft, a rotating shaft of the rotor (2) extends to the outside of the three-phase asynchronous motor at one end away from the end cover assembly (4) to form an extension section, an installation space is formed between the extension section and the inner wall of the wheel shaft of the aircraft wheel, monitoring equipment for monitoring the aircraft wheel is installed in the installation space, the tail end of the extension section extends out of the other end of the wheel shaft, a fan (14) is installed at the tail end of the extension section, a characteristic nut (16) is arranged between one end close to the fan (14) and the inner wall of the wheel shaft, the outer side of the characteristic nut (16) is fixed on a supporting sleeve (18) of the wheel shaft, the inner side of the characteristic nut (16) is connected to the shaft diameter of the extension section through an anti-swing bearing (22), a monitoring equipment in the axial direction is arranged on the shell of the aircraft wheel, the monitoring equipment extends out of the strip-shaped motor from the monitoring equipment to the strip-shaped motor, and the strip-shaped sensor is led out of the strip-shaped motor from the monitoring equipment to the strip-shaped motor assembly;
wherein the monitoring device comprises a speed sensor (19) and a tire pressure actuator (20); the fan (14) is provided with blades and a shaft hole, the rotating hole is fixedly connected with the tail end of the extension section through a spline (15), a reverse screw nut (21) is arranged on the outer side of the shaft hole of the fan (14), the fan (14) is fastened through the reverse screw nut (21), the reverse screw nut (21) is in threaded connection with the tail end of the extension section, the screwing direction of the reverse screw nut (21) is opposite to the rotation direction of the fan (14), a thermistor for collecting winding temperature signals is buried in a stator winding of the three-phase asynchronous motor, and the thermistor is connected with on-machine monitoring equipment.
2. The long shaft extension three-phase asynchronous motor of an aviation brake system according to claim 1, wherein the outer shell of the three-phase asynchronous motor is mounted on a supporting sleeve (18) of the inner wall of an axle of an aircraft wheel in a matching mode of a notch and a bulge.
3. An airbrake system long-shaft extension three-phase asynchronous motor according to claim 1, characterized in that the end cap assembly (4) is provided with a pressing element, which is capable of pressing the sensor lead-out wire.
4. The long shaft extension three phase asynchronous motor of an aircraft brake system according to claim 1 wherein said fan (14) has a housing external to the axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111522818.6A CN114337169B (en) | 2021-12-13 | 2021-12-13 | Long shaft extension three-phase asynchronous motor of aviation brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111522818.6A CN114337169B (en) | 2021-12-13 | 2021-12-13 | Long shaft extension three-phase asynchronous motor of aviation brake system |
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| Publication Number | Publication Date |
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| CN114337169A CN114337169A (en) | 2022-04-12 |
| CN114337169B true CN114337169B (en) | 2024-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111522818.6A Active CN114337169B (en) | 2021-12-13 | 2021-12-13 | Long shaft extension three-phase asynchronous motor of aviation brake system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2671215Y (en) * | 2003-06-24 | 2005-01-12 | 上海电器科学研究所 | Explosion proof water cooling frequency variable speed adjustable three-phase asynchronous motor |
| CN205092742U (en) * | 2015-11-13 | 2016-03-16 | 乐山三缘电机有限公司 | Three -phase asynchronous motor that can monitor |
| CN206302314U (en) * | 2016-12-16 | 2017-07-04 | 卧龙电气集团股份有限公司 | A kind of phase asynchronous variable-frequency motor of main pump |
| CN107888010A (en) * | 2017-11-17 | 2018-04-06 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of motor sealing structure and motor |
| WO2018191990A1 (en) * | 2017-04-18 | 2018-10-25 | 南通森玛特电机有限公司 | High-efficiency explosion-proof three-phase asynchronous motor |
| CN111786514A (en) * | 2020-07-23 | 2020-10-16 | 佳木斯电机股份有限公司 | Built-in slip ring brush yoke system structure of satisfying IP55 |
| CN112564444A (en) * | 2020-12-18 | 2021-03-26 | 沈阳兴华航空电器有限责任公司 | Three-phase asynchronous motor structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210354566A1 (en) * | 2021-06-21 | 2021-11-18 | Jacob Ben-Ari | Scalable Tractive-Power System For Electric Railway-Vehicles Integrated into All-Wheel Electric Steering and Electric Braking Systems, Deriving 90% To 99% Traction and Dynamic Efficiency |
-
2021
- 2021-12-13 CN CN202111522818.6A patent/CN114337169B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2671215Y (en) * | 2003-06-24 | 2005-01-12 | 上海电器科学研究所 | Explosion proof water cooling frequency variable speed adjustable three-phase asynchronous motor |
| CN205092742U (en) * | 2015-11-13 | 2016-03-16 | 乐山三缘电机有限公司 | Three -phase asynchronous motor that can monitor |
| CN206302314U (en) * | 2016-12-16 | 2017-07-04 | 卧龙电气集团股份有限公司 | A kind of phase asynchronous variable-frequency motor of main pump |
| WO2018191990A1 (en) * | 2017-04-18 | 2018-10-25 | 南通森玛特电机有限公司 | High-efficiency explosion-proof three-phase asynchronous motor |
| CN107888010A (en) * | 2017-11-17 | 2018-04-06 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of motor sealing structure and motor |
| CN111786514A (en) * | 2020-07-23 | 2020-10-16 | 佳木斯电机股份有限公司 | Built-in slip ring brush yoke system structure of satisfying IP55 |
| CN112564444A (en) * | 2020-12-18 | 2021-03-26 | 沈阳兴华航空电器有限责任公司 | Three-phase asynchronous motor structure |
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| CN114337169A (en) | 2022-04-12 |
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