CN211205638U

CN211205638U - Ultra-precise laser automatic de-weighting dynamic balancing machine of micro turbojet engine rotor

Info

Publication number: CN211205638U
Application number: CN201922404241.3U
Authority: CN
Inventors: 运侠伦; 赵飞; 庞哲凯; 梅雪松
Original assignee: Wuxi Chaotong Intelligent Manufacturing Technology Research Institute Co ltd
Current assignee: Wuxi Chaotong Intelligent Manufacturing Technology Research Institute Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-08-07
Anticipated expiration: 2029-12-27

Abstract

The utility model relates to an automatic heavy dynamic balancing machine that removes of ultra-precise laser of miniature turbojet engine rotor, mainly by equipping the base, rotor supporting mechanism, vibration transmission mechanism, unbalanced detection mechanism, refer to phase detection mechanism, air feed mechanism, the automatic heavy mechanism that removes of laser and powder recovery mechanism constitute, rotor supporting mechanism fixes on vibration transmission mechanism, both integral erection are on being fixed in the slide rail of equipping the base, the automatic heavy mechanism that removes of laser contains the arm, the heavy light source of laser, the laser positioning light source, the laser positioning receiving terminal, highly-compressed air drive mechanism contains the air compressor machine, the gas holder, gas nozzle, the solenoid valve, the air-vent valve, powder recovery mechanism contains the dust absorption head, the aspiration pump, the connecting tube, the powder collecting vessel, wherein the dust absorption head, the aspiration pump, the connecting tube. The utility model provides an ultra-precision balancing machine is applicable to the high-precision dynamic balance of miniature turbojet engine rotor, adopts high-pressure air drive, simulation rotor complete machine running state.

Description

Ultra-precise laser automatic de-weighting dynamic balancing machine of micro turbojet engine rotor

Technical Field

The invention relates to automatic dynamic balancing equipment, in particular to an ultra-precise laser automatic de-weighting dynamic balancing machine for a rotor of a micro turbojet engine.

Background

The micro turbojet engine has the characteristics of high energy storage density, high power-to-weight ratio and the like, and meets the development requirements of future micro aircrafts. The rotor of the micro turbojet engine is a core component of the micro turbojet engine, and the running state of the whole flight equipment can be directly influenced by the condition whether the engine runs or not.

During the actual production, assembly and operation of the rotor, due to factors such as uneven material, error in machining or assembly, design reasons, abrasion in the operation process and the like, a certain amount of unbalance is generated on the rotor, which causes the rotor to generate a centrifugal inertia force which changes periodically, and due to the extremely high operating rotating speed of the micro turbojet engine, the centrifugal inertia force generated at such a high rotating speed is not small or even very small. In conclusion, the rotor is inevitably in an unbalanced state in the operation process, so that vibration, noise and abrasion are caused, the service life of the engine is influenced, and even disastrous accidents are caused.

The micro turbojet engine is a typical flexible rotor with extremely high rotating speed between the first-order rotating speed and the second-order rotating speed. Due to the particularity and complexity of flexible rotors, no universal commercial balancing machine has been available to solve the dynamic balancing problem, and due to their small size, conventional de-weighting methods may damage their structure and make it difficult to achieve a small removal of material at the calibration surface. Therefore, for the micro turbojet engine rotor, it is necessary to design an appropriate ultra-precise automatic de-weight balancing device.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides the ultraprecise laser automatic de-weighting dynamic balancer of the micro turbojet engine rotor, which can overcome the defects that the existing balancing equipment is low in balancing efficiency, low in balancing precision and difficult to balance the micro flexible rotor, and effectively improves the balancing efficiency and precision of the micro turbojet engine rotor.

The technical scheme for realizing the purpose of the invention is as follows: an ultra-precise laser automatic de-weighting dynamic balancing machine of a micro turbojet engine rotor comprises an equipment base, a rotor supporting mechanism, a vibration transmission mechanism, a reference phase detection mechanism, a high-pressure air driving mechanism and an automatic laser de-weighting mechanism; the vibration transmission mechanism is arranged on a sliding rail fixed on the equipment base in a sliding manner; the rotor supporting mechanism is fixedly arranged on the vibration transmission mechanism through a supporting swing frame; the high-pressure air driving mechanism drives the rotor to rotate; the reference phase detection mechanism consists of an optical fiber sensor and an optical fiber sensor clamp, the optical fiber sensor is fixed on the optical fiber sensor clamp, and the optical fiber sensor clamp is magnetic and is adsorbed on the equipment base and is arranged on the sensor bracket on the sliding rail in a sliding manner; the laser automatic de-weight mechanism comprises a mechanical arm, a laser de-weight light source, a laser positioning receiving end and an axial motion platform; the laser de-weighting light source is fixed on a mechanical arm, and the mechanical arm is arranged on the axial motion platform in a sliding manner; the laser positioning light source is fixed on a motion table of the mechanical arm, and the laser positioning receiving end is positioned on a slide rail where the rotor supporting mechanism and the vibration transmission mechanism are located.

In the technical scheme, the rotor supporting mechanism adopts two supporting rollers to support the rotor, and the supporting rollers are fixed on the roller frame; the bottom of a roller arranged on the roller sliding plate with the adjustable height above the rotor is abutted against the upper end of the rotor; the roller sliding plate is matched with the long hole through a bolt to adjust the vertical height.

The vibration transmission mechanism in the technical scheme is composed of a spring plate, a vibration bridge and a vibration base and is used for transmitting vibration caused by a rotor; the vibration base is arranged on the slide rail, and the position of the vibration base on the slide rail can be adjusted to adapt to the balance requirements of rotors with different lengths.

The technical scheme is also provided with an unbalance detection mechanism; the unbalance detection mechanism comprises an acceleration sensor, a data acquisition card, a measurement circuit and a computer; the left end and the right end of the acceleration sensor are respectively provided with one acceleration sensor, the acceleration sensor at the left end and the acceleration sensor at the right end are arranged on corresponding spring plates through magnetic seats, and the data acquisition card, the measuring circuit and the computer are integrated in the electric control cabinet.

The high-pressure air driving mechanism comprises an air compressor, an air storage tank and an air nozzle; the gas nozzles are directed towards the blades of the rotor.

The technical scheme is also provided with a powder recovery mechanism; the powder recovery mechanism comprises a dust collection head, an air suction pump, a connecting pipeline and a powder collection barrel, wherein the dust collection head, the air suction pump and the connecting pipeline are all fixed on the mechanical arm and move along with the mechanical arm, the dust collection head and the laser de-weighting light source face to the same area, and in the laser de-weighting process, processing powder is sucked to the powder collection barrel.

Among the above-mentioned technical scheme, install angle sensor in the arm.

The gas nozzle in the technical scheme is provided with a first pneumatic blowing head and a second pneumatic blowing head; the first pneumatic blowing head and the second pneumatic blowing head are symmetrically arranged on two sides of the rotor in the circumferential direction through the corresponding first blowing head bracket and the corresponding second blowing head bracket.

In the technical scheme, the electric control cabinet comprises a data acquisition card, a measuring circuit, a control mechanism, a computer and a human-computer interface, so as to acquire and process data of the optical fiber sensor, the acceleration sensor and the angle sensor, calculate the unbalance amount and the phase and output a control signal.

After the technical scheme is adopted, the invention has the following positive effects:

(1) the invention adopts a laser de-weighting mode, avoids damaging the effective structure, can realize accurate balance correction on a tiny correction surface, and improves the balance precision and the balance efficiency;

(2) the invention adopts high-pressure gas to drive the rotor to rotate, well simulates the actual running state of the rotor, and can realize the driving at high rotating speed so as to carry out the dynamic balance of the rotor at the rotating speed;

(3) the invention adopts various sensors and automatic equipment in the driving of the rotor, the identification and extraction of the unbalance amount and the correction of the rotor, can realize the automatic identification and correction of the unbalance amount of the rotor, changes the conventional manual correction mode in the past, realizes the automation of dynamic balance, and improves the balance efficiency and reliability.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which

FIG. 1 is a general structure diagram of an ultra-precise laser automatic de-weighting dynamic balancing apparatus of the present invention;

FIG. 2 is a front view of the ultra-precision laser automatic de-weighting dynamic balancing apparatus of the present invention;

fig. 3 is a right side view of the ultra-precision laser automatic de-weighting dynamic balancing apparatus of the present invention.

Detailed Description

(example 1)

Referring to fig. 1 to 3, the present invention is mainly composed of a base, a rotor supporting mechanism, a vibration transmission mechanism, an unbalance detection mechanism, a reference phase detection mechanism, an air supply mechanism, an automatic laser weight removal mechanism, and a powder recovery mechanism.

The rotor supporting mechanism is fixed on the vibration transmission mechanism through screws, the vibration base 4 of the vibration transmission mechanism is arranged on the sliding rail 2 fixed on the equipment base 1 and can axially move on the sliding rail 2, and the distance between the two supporting mechanisms is adjusted to adapt to the balance requirements of rotors with different axial sizes. The height of the roller frame 23 is adjusted through the bolts and the elongated holes, so that the height of the supporting roller 24 of the rotor supporting mechanism is adjusted to adapt to the balance requirements of rotors with different shaft diameters, and finally, the roller at the top end is adjusted to limit the rotors. The operator mounts the micro turbojet engine rotor 13 to be balanced on the rotor support mechanism.

The high-pressure air driving mechanism comprises an air compressor 21, an air storage tank 10, a gas nozzle 12, an electromagnetic valve and a pressure regulating valve. In the initial stage of balance, the control mechanism sends out a control signal, the air compressor 21 starts to work to generate high-pressure air, two symmetrical air nozzles are used for spraying air to the turbine blades so as to drive the rotor 13 to move, corresponding parameters are set on a human-computer interface of the control cabinet, and the control mechanism adjusts the pressure of the sprayed air by adjusting the pressure regulating valve so as to adjust the speed of the rotor 13. The electromagnetic valve can control the on-off of the whole gas circuit. The gas nozzle is provided with a first pneumatic blowing head 9 and a second pneumatic blowing head 12; the first pneumatic blowhead 9 and the second pneumatic blowhead 12 are symmetrically arranged at both sides of the rotor 13 in the circumferential direction through the corresponding first blowhead bracket 8 and second blowhead bracket 11.

The unbalance detection mechanism and the reference phase detection mechanism comprise an acceleration sensor 22 at the left end, an acceleration sensor 22 at the right end, a data acquisition card, a measurement circuit, a computer mechanism, an optical fiber sensor 17 and a clamp thereof, and are mainly used for detecting the original vibration and phase information of the rotor 13 to be corrected. The acceleration sensor 22 acquires acceleration information of a corresponding position, the optical fiber sensor 17 detects a rotating speed signal of the rotor 13 to obtain a pulse signal, generated data is converted into an electric signal and transmitted to the data acquisition card, unbalance and phase information of the unbalance are calculated through the measuring circuit, a result is displayed on a human-computer interaction interface, a corresponding balance strategy is generated, and the control mechanism generates a corresponding control signal to control the laser automatic de-weighting mechanism to perform automatic correction. The optical fiber sensor 17 is fixed on an optical fiber sensor clamp 18, and the optical fiber sensor clamp 18 has magnetism and is adsorbed on the sensor bracket 3 which is arranged on the slide rail 2 in a sliding way on the equipment base 1.

The control mechanism controls the electromagnetic valve to be switched off, namely controls the high-pressure air driving mechanism to stop working.

The laser automatic de-weight mechanism comprises a mechanical arm 14, a laser de-weight light source 27, a laser positioning light source 15, a laser positioning receiving end 20 and an axial motion table 26, wherein the laser positioning receiving end 20 is fixed on the rotor supporting mechanism so as to axially position the whole laser automatic de-weight mechanism. The mechanical arm 14 can move on the axial motion platform 26 through the worm gear and worm, according to the control instruction of the control mechanism, the position of the required balance plane is reached, and then the position of the mechanical arm 14 is adjusted to enable the laser de-weighting light source 27 to reach the designated position. The laser deduplication light source 27 then operates on command to produce high-energy laser light that automatically deduplicates the rotor 13 to remove the appropriate mass at the designated location by controlling the laser wavelength and power and the application time.

The powder recovery mechanism comprises a dust collection head 28, an air suction pump and a connecting pipeline 16, wherein the dust collection head 28 is parallel to the laser de-weighting light source 27 and faces the same area, the air suction pump is started after the laser de-weighting light source 27 works for a short time, the dust collection head 28 sucks the processed powder and reaches the powder collection barrel through the connecting pipeline 16, and the influence of the powder on the processing quality and the balance site environment is avoided.

And restarting the high-pressure air driving mechanism to drive the rotor 13, measuring the residual unbalance amount and the phase of the rotor 13 after balance through the unbalance detection mechanism and the reference phase detection mechanism, repeating the balance steps to further balance the rotor 13 if the required precision is not achieved, outputting a success signal to the human-computer interaction interface if the balance is not achieved, and displaying the residual unbalance amount and the phase.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultra-precise laser automatic de-weighting dynamic balancing machine of a micro turbojet engine rotor is characterized by comprising an equipment base, a rotor supporting mechanism, a vibration transmission mechanism, a reference phase detection mechanism, a high-pressure air driving mechanism and an automatic laser de-weighting mechanism; the vibration transmission mechanism is arranged on a sliding rail (2) fixed on the equipment base (1) in a sliding manner; the rotor supporting mechanism is fixedly arranged on the vibration transmission mechanism through a supporting swing frame (7); the high-pressure air driving mechanism drives the rotor (13) to rotate; the reference phase detection mechanism consists of an optical fiber sensor (17) and an optical fiber sensor clamp (18), the optical fiber sensor (17) is fixed on the optical fiber sensor clamp (18), and the optical fiber sensor clamp (18) has magnetism and is adsorbed on the equipment base (1) and is arranged on the sensor support (3) on the sliding rail (2) in a sliding manner; the automatic laser de-weighting mechanism comprises a mechanical arm (14), a laser de-weighting light source (27), a laser positioning light source (15), a laser positioning receiving end (20) and an axial moving platform (26); wherein the laser de-weighting light source (27) is fixed on the mechanical arm (14), and the mechanical arm (14) is arranged on the axial motion platform (26) in a sliding manner; the laser positioning light source (15) is fixed on a moving table of the mechanical arm (14), and the laser positioning receiving end (20) is positioned on the sliding rail (2) where the rotor supporting mechanism and the vibration transmission mechanism are located.

2. The ultra-precise laser automatic de-weighting balancing machine for the rotor of the micro turbojet engine according to claim 1, wherein the rotor supporting mechanism supports the rotor (13) by using two supporting rollers (24), and the supporting rollers (24) are fixed on a roller frame (23); the bottom of a roller arranged on the roller sliding plate (25) with adjustable height above the rotor (13) is propped against the upper end of the rotor (13); the roller sliding plate (25) is matched with the long hole through a bolt to adjust the vertical height.

3. The ultra-precise laser automatic de-weighting balancing machine for the rotor of the micro turbojet engine according to claim 1, wherein the vibration transmission mechanism consists of a spring plate (5), a vibration bridge (6) and a vibration base (4) and is used for transmitting vibration caused by the rotor (13); the vibration base (4) is arranged on the sliding rail (2), and the position of the vibration base on the sliding rail (2) can be adjusted to adapt to the balance requirements of rotors (13) with different lengths.

4. The ultra-precise laser automatic de-weighting dynamic balancing machine of the micro turbojet engine rotor according to claim 3, characterized by further comprising an unbalance detection mechanism; the unbalance detection mechanism comprises an acceleration sensor (22), a data acquisition card, a measurement circuit and a computer; the left end and the right end of the acceleration sensor (22) are respectively provided with one acceleration sensor, the acceleration sensor (22) at the left end and the acceleration sensor (22) at the right end are arranged on the corresponding spring plate (5) through magnetic seats, and the data acquisition card, the measuring circuit and the computer are integrated in the electric control cabinet (19).

5. The ultra-precise laser automatic de-weighting balancing machine for the rotor of the micro turbojet engine according to claim 1, wherein the high-pressure air driving mechanism comprises an air compressor (21), an air storage tank (10) and a gas nozzle; the gas nozzles are directed towards the blades of the rotor (13).

6. The ultra-precise laser automatic de-weighting dynamic balancing machine of the micro turbojet engine rotor according to claim 1, characterized by further comprising a powder recovery mechanism; the powder recovery mechanism comprises a dust collection head (28), an air pump, a connecting pipeline (16) and a powder collection barrel, wherein the dust collection head (28), the air pump and the connecting pipeline (16) are all fixed on the mechanical arm (14) and move along with the mechanical arm (14), the dust collection head (28) and the laser de-weighting light source (27) face to the same area, and powder is sucked and processed to the powder collection barrel in the laser de-weighting process.

7. The ultra-precise laser automatic de-weighting dynamic balancing machine for the rotor of the micro turbojet engine according to claim 4, characterized in that an angle sensor is installed in the mechanical arm (14).

8. The ultra-precise laser automatic de-weighting dynamic balancing machine for micro-turbojet engine rotors according to claim 5, characterized in that the gas nozzle has a first pneumatic blowhead (9) and a second pneumatic blowhead (12); the first pneumatic blowing head (9) and the second pneumatic blowing head (12) are symmetrically arranged on two sides of the rotor (13) in the circumferential direction through the corresponding first blowing head bracket (8) and the second blowing head bracket (11).

9. The ultra-precise laser automatic de-weighting dynamic balancing machine of the micro turbojet engine rotor according to claim 7, wherein the electronic control cabinet (19) comprises a data acquisition card, a measurement circuit, a control mechanism, a computer and a human-computer interface, so as to acquire and process data of the optical fiber sensor (17), the acceleration sensor (22) and the angle sensor, calculate unbalance and phase and output a control signal.