CN103511085A - Engine speed monitoring system - Google Patents
Engine speed monitoring system Download PDFInfo
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- CN103511085A CN103511085A CN201310484535.6A CN201310484535A CN103511085A CN 103511085 A CN103511085 A CN 103511085A CN 201310484535 A CN201310484535 A CN 201310484535A CN 103511085 A CN103511085 A CN 103511085A
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Abstract
The invention discloses an engine speed monitoring system which comprises an accessory drive casing (1); a transmission gear (2) is arranged in the accessory drive casing (1) through a supporting bearing (3); a magnetoelectric tachometric transducer (4) with the main center line parallel to the axis of the transmission gear (2) is mounted on the accessory drive casing (1); an induction boss (5) is arranged on the surface of the magnetoelectric tachometric transducer (4); the center line of the induction boss (5) is vertical to the main center line of the magnetoelectric tachometric transducer (4); the induction boss (5) directly faces gear teeth of the transmission gear (2). The magnetoelectric tachometric transducer is compact in structure and small in size; an additional phonic wheel is not required to convert speed signals, and not only can the engine speed be monitored, but also the running performance and the reliability of an engine can be ensured.
Description
Technical field
The present invention relates to aero engine technology field, especially, relate to a kind of engine speed supervisory system.
Background technique
Aeroengine requires to work lastingly and reliably under high temperature, high pressure and under high rotating speed, therefore various kinds of sensors need to be installed on motor monitors working state in real time, magnetoelectric tachometric transducer is exactly to be wherein used for the important device of monitor engine speed, and the tach signal that it records is the important evidence that aeroengine control system is carried out state control.
At present, annex in aeroengine rotates the monitor speed of the driving gear in casing, sensor can not direct feeling driving gear tach signal, an end face phonic wheel must be set specially on driving gear, by end face phonic wheel, synchronizeing with driving gear to rotate provides tach signal, need to increase like this this transfer part of end face phonic wheel, thereby causes cost of production to rise, engine weight increases, hydraulic performance decline.
Therefore, studying a kind of engine speed supervisory system has been technical problem urgently to be resolved hurrily.
Summary of the invention
The object of the invention is to provide a kind of engine speed supervisory system, to solve sensor, need to carry out the technical problem that tach signal conversion causes cost rising, weight increase and hydraulic performance decline by end face phonic wheel is set.
For achieving the above object, according to an aspect of the present invention, a kind of engine speed supervisory system is provided, comprise accessory drive casing, in accessory drive casing, be provided with driving gear, driving gear is arranged on accessory drive casing by block bearing, the magnetoelectric tachometric transducer of main center line and driving gearshaft line parallel is installed on accessory drive casing, on magnetoelectric tachometric transducer, be provided with induction boss, induction boss is arranged on the surface of magnetoelectric tachometric transducer, the induction center line of boss and the main center line of magnetoelectric tachometric transducer are vertical, induction boss is over against the gear teeth of driving gear.
Further, accessory drive casing is set to flat.
Further, between induction boss and the gear teeth of driving gear, have air gap; Rotary state at driving gear, the tooth top of the gear teeth and tooth paddy are alternately through induction boss, size of gaps generating period between induction boss and the gear teeth changes, thereby produce periodic voltage in the inductor coil of magnetoelectric tachometric transducer, by the processing to periodic voltage, count, record the rotating speed of driving gear.
Further, driving gear and magnetoelectric tachometric transducer are arranged on the casing wall of accessory drive casing, and the main center line of the wheel shaft of driving gear and magnetoelectric tachometric transducer is all arranged along the direction of the casing wall perpendicular to accessory drive casing.
Further, the wheel shaft two ends of driving gear are arranged on respectively on the upper casing and lower casing of accessory drive casing by block bearing.
Further, magnetoelectric tachometric transducer is arranged on the upper casing or the installation of sensors hole on lower casing of accessory drive casing.
Further, accessory drive casing is flat plate-like.
Further, the plan view shape of accessory drive casing is that the polygonal of rounding arc angle and the region of installing for annex are large, and the side-glance shape of accessory drive casing is that the region irregularly shaped and that install for annex that combines of a plurality of polygonals is little.
Further, the centerline of induction boss is between the gear teeth both ends of the surface of driving gear, and induction boss center line is all not less than 1.65mm apart from the distance of the gear teeth both ends of the surface of driving gear.
Further, the minimal air gap between induction boss and driving gear is 0.4mm-0.6mm.
The present invention has following beneficial effect:
Magnetoelectric tachometric transducer compact structure, volume are small and exquisite; The main center line of magnetoelectric tachometric transducer and driving gearshaft line parallel, be convenient to magnetoelectric tachometric transducer and driving gear in the mounting arrangements of accessory drive casing inside, when playing engine speed monitoring object, to engine accessory power rating transmission casing, do not bring too much weight load and space burden again; The gear teeth that boss and driving gear are convenient to respond in the side that induction boss is arranged on magnetoelectric tachometric transducer over against position, can directly from the gear teeth of driving gear, experience tach signal, be convenient to magnetoelectric tachometric transducer by the tooth top of the gear teeth and the cyclically-varying of tooth paddy of induction boss induction driving gear, to record the rotating speed of driving gear, further obtain the rotating speed of motor main rotor, without phonic wheel is set in addition, carry out tach signal conversion, in monitor engine speed, guaranteed again runnability and the reliability of motor.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of preferred embodiment of the present invention engine speed supervisory system;
Fig. 2 is the plan structure schematic diagram of preferred embodiment of the present invention accessory drive casing;
Fig. 3 is that the A-A of Fig. 2 is to sound view.
Marginal data:
1, accessory drive casing; 2, driving gear; 3, block bearing; 4, magnetoelectric tachometric transducer; 5, induction boss; 6, air gap; 7, upper casing; 8, lower casing; 9, installation of sensors hole.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Fig. 1 is the structural representation of preferred embodiment of the present invention engine speed supervisory system, as shown in Figure 1, the engine speed supervisory system of the present embodiment, comprise accessory drive casing 1, in accessory drive casing 1, be provided with driving gear 2, driving gear 2 is arranged in accessory drive casing 1 by block bearing 3, the main center line magnetoelectric tachometric transducer 4 parallel with driving gear 2 axis is installed on accessory drive casing 1, on magnetoelectric tachometric transducer 4, be provided with induction boss 5, induction boss 5 is arranged on the surface of magnetoelectric tachometric transducer 4, the induction center line of boss 5 and the main center line of magnetoelectric tachometric transducer 4 are vertical, induction boss 5 is over against the gear teeth of driving gear 2.Magnetoelectric tachometric transducer 4 compact structures, volume are small and exquisite; The main center line of magnetoelectric tachometric transducer 4 is parallel with driving gear 2 axis, be convenient to magnetoelectric tachometric transducer 4 and the mounting arrangements of driving gear 2 in accessory drive casing 1 inside, when playing engine speed monitoring object, to engine accessory power rating transmission casing 1, do not bring too much weight load and space burden again; The gear teeth that boss 5 and driving gear 2 are convenient to respond in the side that induction boss 5 is arranged on magnetoelectric tachometric transducer 4 over against position, can directly from the gear teeth of driving gear 2, experience tach signal, be convenient to magnetoelectric tachometric transducer 4 by the tooth top of the gear teeth and the cyclically-varying of tooth paddy of induction boss 5 induction driving gears 2, to record the rotating speed of driving gear 2, further obtain the rotating speed of motor main rotor, without phonic wheel is set in addition, carry out tach signal conversion, in monitor engine speed, guaranteed again runnability and the reliability of motor.Magnetoelectric tachometric transducer 4 has very strong anti-interference, can adapt to various state environment; Output signal is strong, and measuring range is wide, and various rotatable parts and surperficial apertured rotor can be measured; Maintenance cost is low, by magnetoelectric induction, realizes measurement, and running is without power supply; Running does not need machinery action yet, without lubricated; Compact structure, volume are small and exquisite, easy to install, can use with various instruments overlap joints.Magnetoelectric tachometric transducer 4 is arranged on the accessory drive casing 1 of aeroengine to measure the rotating speed of driving gear 2, because each driving gear 2 rotating speed and motor main rotor rotating speed have specific ratio, can indirectly measure thus the rotating speed of motor main rotor.Magnetoelectric tachometric transducer 4 comprises the component such as iron core, magnet steel, inductor coil and induction boss 5, and take magnetoelectric induction and realize tachometric survey as basic principle.During measurement, the induction boss 5 of magnetoelectric tachometric transducer 4 faces the gear teeth of driving gear 2, when gear rotates, the big or small generating period of air gap 6 between induction boss 5 and the gear teeth changes, thereby produce periodic voltage in the inductor coil of magnetoelectric tachometric transducer 4, by the processing to this voltage, count, just can measure the rotating speed of driving gear 2.
Fig. 2 is the plan structure schematic diagram of preferred embodiment of the present invention accessory drive casing; Fig. 3 be the A-A of Fig. 2 to sectional view, as shown in Figure 2,3, in the present embodiment, accessory drive casing 1 is set to be beneficial to the flat of various annexes being installed and reducing complete machine overall sizes.The accessory drive casing 1 of aeroengine is designed to flat (as shown in Figures 2 and 3) and is beneficial to install the various annexes of needs and reduces complete machine overall sizes.A feature of the casing of this flat is the out-of-shape of positive (overlooking face) comparison rule and great ， side, region (side-looking face) surrounding that can supply annex installation and can supplies the region of annex installation little.When the installation accessories of the side of flat casing, very likely can increase the overall sizes of motor, increase wind-exposuring area, the resistance of air while increasing aircraft flight, strengthens fuel consumption.
As shown in Figure 1, 2, 3, in the present embodiment, between induction boss 5 and the gear teeth of driving gear 2, have air gap 6; Rotary state at driving gear 2, the tooth top of the gear teeth and tooth paddy are alternately through induction boss 5, the big or small generating period of air gap 6 between induction boss 5 and the gear teeth changes, thereby produce periodic voltage in the inductor coil of magnetoelectric tachometric transducer 4, by the processing to periodic voltage, count, record the rotating speed of driving gear 2.
As shown in Figure 1, 2, 3, in the present embodiment, driving gear 2 and magnetoelectric tachometric transducer 4 are arranged on the casing wall of accessory drive casing 1, and the main center line of the wheel shaft of driving gear 2 and magnetoelectric tachometric transducer 4 is all arranged along the direction of the casing wall perpendicular to accessory drive casing 1.A feature of the casing of flat is that plan structure comparison rule and the region that can install for annex are large, and the out-of-shape of side-looking and the region that can install for annex are little.And when the installation accessories of the side of flat casing, very likely can increase the overall sizes of motor, and increasing wind-exposuring area, the resistance of air while increasing aircraft flight, strengthens fuel consumption; Therefore annex need to be arranged along overlooking direction.
As shown in Figure 1, 2, 3, in the present embodiment, the wheel shaft two ends of driving gear 2 are arranged on respectively on the upper casing 7 and lower casing 8 of accessory drive casing 1 by block bearing 3.When the installation accessories of the side of flat casing, very likely can increase the overall sizes of motor, increase wind-exposuring area, the resistance of air while increasing aircraft flight, strengthens fuel consumption; Therefore annex need to be arranged along overlooking direction, be also arranged on the surface of upper casing 7 and/or lower casing 8.
As shown in Figure 1, 2, 3, in the present embodiment, magnetoelectric tachometric transducer 4 is arranged on the upper casing 7 or the installation of sensors hole 9 on lower casing 8 of accessory drive casing 1.When the installation accessories of the side of flat casing, very likely can increase the overall sizes of motor, increase wind-exposuring area, the resistance of air while increasing aircraft flight, strengthens fuel consumption; Therefore annex need to be arranged along overlooking direction, be also connected on upper casing 7 or lower casing 8.
As shown in Figure 1, 2, 3, in the present embodiment, the flat plate-like that accessory drive casing 1 is for the benefit of worked and flown and needs and reduce wind-exposuring area.Aeroengine needs according to its working principle and aircraft flight, and the plate-like that design growth is flat, to reduce as far as possible wind-exposuring area.
As shown in Figure 1, 2, 3, in the present embodiment, the plan view shape of accessory drive casing 1 is that the polygonal of rounding arc angle and the region of installing for annex are large, and the side-glance shape of accessory drive casing 1 is that the region irregularly shaped and that install for annex that is put together each other of a plurality of polygonals is little.Being beneficial to install needs various annexes and reduces complete machine overall sizes.
As shown in Figure 1, 2, 3, in the present embodiment, the centerline of induction boss 5 is between the gear teeth both ends of the surface of driving gear 2, and induction boss 5 center lines are all not less than 1.65mm apart from the distance of the gear teeth both ends of the surface of driving gear 2.Within the scope of this, can obviously improve induction boss 5 for induction and the induction validity of the tach signal of the gear teeth of driving gear 2.
As shown in Figure 1, 2, 3, in the present embodiment, the minimal air gap 6 between induction boss 5 and driving gear 2 is 0.4mm-0.6mm.Within the scope of this, can obviously improve induction boss 5 for induction and the induction validity of the tach signal of the gear teeth of driving gear 2.
During enforcement, engine speed supervisory system of the present invention, the magnetoelectric tachometric transducer 4 that comprises accessory drive casing 1, driving gear 2, block bearing 3, induction boss 5 sides, is suitable for the rotating speed of the main center line of magnetoelectric tachometric transducer 4 and driving gear 2 center lines when parallel and directly measures.
When engine operation, the magnetoelectric tachometric transducer 4 of induction boss 5 sides maintains static, driving gear 2 rotates, the gear teeth and near teeth groove cycle induction boss 5 that are distributed on gear large-diameter portion position turn over, thereby form periodically variable air gap 6, in the inductor coil of magnetoelectric tachometric transducer 4, produce periodic voltage, by the processing to this voltage, count, measure the rotating speed of gear.
The magnetoelectric tachometric transducer 4 of induction boss 5 sides of the present invention is more suitable for using on the accessory drive casing 1 of flat than traditional sensors, can avoid increasing end face phonic wheel, cut down finished cost, alleviate engine weight, improve engine performance and reliability.
The magnetoelectric tachometric transducer 4 of induction boss 5 sides of the present invention is for the Transform Type design of aviation turboshaft engine, in order to replace the sensor that originally needs end face phonic wheel to be used in conjunction with, the motor overall test of more than 80 hour after improving at present, trial run is good.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. an engine speed supervisory system, comprises accessory drive casing (1),
In described accessory drive casing (1), be provided with driving gear (2),
Described driving gear (2) is arranged in described accessory drive casing (1) by block bearing (3),
It is characterized in that,
The main center line magnetoelectric tachometric transducer (4) parallel with described driving gear (2) axis is installed on described accessory drive casing (1),
On described magnetoelectric tachometric transducer (4), be provided with induction boss (5),
Described induction boss (5) is arranged on the surface of described magnetoelectric tachometric transducer (4),
The center line of described induction boss (5) is vertical with the main center line of described magnetoelectric tachometric transducer (4),
Described induction boss (5) is over against the gear teeth of described driving gear (2).
2. engine speed supervisory system according to claim 1, is characterized in that, described accessory drive casing (1) is set to flat.
3. engine speed supervisory system according to claim 2, is characterized in that,
Between the gear teeth of described induction boss (5) and described driving gear (2), have air gap (6);
Rotary state in described driving gear (2), the tooth top of the described gear teeth and tooth paddy is process described induction boss (5) alternately,
The big or small generating period of described air gap (6) between described induction boss (5) and the described gear teeth changes,
Thereby in the inductor coil of described magnetoelectric tachometric transducer (4), produce periodic voltage,
By the processing to periodic voltage, count, record the rotating speed of described driving gear (2).
4. engine speed supervisory system according to claim 3, it is characterized in that, described driving gear (2) and described magnetoelectric tachometric transducer (4) are arranged on the casing wall of described accessory drive casing (1), and the main center line of the wheel shaft of described driving gear (2) and described magnetoelectric tachometric transducer (4) is all arranged along the direction of the casing wall perpendicular to described accessory drive casing (1).
5. engine speed supervisory system according to claim 4, it is characterized in that, the wheel shaft two ends of described driving gear (2) are arranged on respectively on the upper casing (7) and lower casing (8) of described accessory drive casing (1) by described block bearing (3).
6. engine speed supervisory system according to claim 4, it is characterized in that, described magnetoelectric tachometric transducer (4) is arranged on the upper casing (7) or the installation of sensors hole (9) on lower casing (8) of described accessory drive casing (1).
7. according to the engine speed supervisory system described in any one in claim 1 to 8, it is characterized in that, described accessory drive casing (1) is flat plate-like.
8. according to the engine speed supervisory system described in any one in claim 1 to 8, it is characterized in that,
The plan view shape of described accessory drive casing (1) is that the polygonal of rounding arc angle and the region of confession annex installation are large,
The side-glance shape of described accessory drive casing (1) is that combine irregularly shaped of a plurality of polygonals and the region of installing for annex are little.
9. according to the engine speed supervisory system described in any one in claim 1 to 8, it is characterized in that,
The centerline of described induction boss (5) between the gear teeth both ends of the surface of described driving gear (2),
And described induction boss (5) center line is all not less than 1.65mm apart from the distance of the gear teeth both ends of the surface of described driving gear (2).
10. according to the engine speed supervisory system described in any one in claim 1 to 8, it is characterized in that, the minimal air gap (6) between described induction boss (5) and described driving gear (2) is 0.4mm-0.6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310484535.6A CN103511085B (en) | 2013-10-16 | 2013-10-16 | A kind of engine speed supervisory system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310484535.6A CN103511085B (en) | 2013-10-16 | 2013-10-16 | A kind of engine speed supervisory system |
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| CN103511085A true CN103511085A (en) | 2014-01-15 |
| CN103511085B CN103511085B (en) | 2016-02-03 |
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| CN201310484535.6A Active CN103511085B (en) | 2013-10-16 | 2013-10-16 | A kind of engine speed supervisory system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793007A (en) * | 2015-04-15 | 2015-07-22 | 北京航科发动机控制系统科技有限公司 | Device for measuring rotation speed of aviation engine rotor |
| CN114526322A (en) * | 2022-02-25 | 2022-05-24 | 中国航发沈阳发动机研究所 | Birotor aeroengine accessory transmission system |
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| EP1879032A1 (en) * | 2006-07-14 | 2008-01-16 | Toyo Denso Co., Ltd. | Combined speed and temperature sensor for an engine |
| US20080202853A1 (en) * | 2007-02-22 | 2008-08-28 | Aisin Ai Co., Ltd. | Transmission Including Magnetic Sensor Device |
| CN202710587U (en) * | 2012-06-27 | 2013-01-30 | 中国航空动力机械研究所 | Speed measuring inducing device and high-speed magnetoelectric revolution speed sensor |
| CN202851888U (en) * | 2012-09-03 | 2013-04-03 | 中国航空动力机械研究所 | Drive gear box |
-
2013
- 2013-10-16 CN CN201310484535.6A patent/CN103511085B/en active Active
Patent Citations (4)
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| EP1879032A1 (en) * | 2006-07-14 | 2008-01-16 | Toyo Denso Co., Ltd. | Combined speed and temperature sensor for an engine |
| US20080202853A1 (en) * | 2007-02-22 | 2008-08-28 | Aisin Ai Co., Ltd. | Transmission Including Magnetic Sensor Device |
| CN202710587U (en) * | 2012-06-27 | 2013-01-30 | 中国航空动力机械研究所 | Speed measuring inducing device and high-speed magnetoelectric revolution speed sensor |
| CN202851888U (en) * | 2012-09-03 | 2013-04-03 | 中国航空动力机械研究所 | Drive gear box |
Non-Patent Citations (1)
| Title |
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| 黄志坚: "《挖掘机液压系统维修速查》", 31 January 2012, article "挖掘机液压故障诊断与排除方法" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793007A (en) * | 2015-04-15 | 2015-07-22 | 北京航科发动机控制系统科技有限公司 | Device for measuring rotation speed of aviation engine rotor |
| CN114526322A (en) * | 2022-02-25 | 2022-05-24 | 中国航发沈阳发动机研究所 | Birotor aeroengine accessory transmission system |
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| CN103511085B (en) | 2016-02-03 |
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Address after: Dong Jiaduan 412002 in Hunan province Zhuzhou city Lusong District Patentee after: AECC HUNAN AVIATION POWERPLANT Research Institute Country or region after: China Address before: Dong Jiaduan 412002 in Hunan province Zhuzhou city Lusong District Patentee before: CHINA AVIATION POWER MACHINERY INSTITUTE Country or region before: China |