CN110514387B

CN110514387B - Main shaft driving mechanism for wind tunnel opening test section rotating system

Info

Publication number: CN110514387B
Application number: CN201910720990.9A
Authority: CN
Inventors: 牟伟强; 卜忱; 沈彦杰
Original assignee: AVIC Aerodynamics Research Institute
Current assignee: AVIC Aerodynamics Research Institute
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2021-06-29
Anticipated expiration: 2039-08-06
Also published as: CN110514387A

Abstract

The invention discloses a main shaft driving mechanism for a wind tunnel opening test section rotating system, which comprises a supporting shaft sleeve, a rotating main shaft, a motor mounting seat, a coupling and a speed reducer, wherein an output shaft of the motor is coaxially connected with the rotating main shaft through the coupling and the speed reducer in sequence, the main shaft driving mechanism also comprises an electromagnetic brake, a sliding ring and an insulating sleeve, the electromagnetic brake is sleeved at the rear end of the rotating main shaft, an inner ring of the sliding ring is fixedly connected with the outer wall of the rear end of the rotating main shaft, an outer ring of the sliding ring is fixedly connected with the motor mounting seat, the insulating sleeve is coaxially fixed in the rotating main shaft, and a strong current cable. The invention can reduce the power loss in the transmission link, improve the starting time, realize the automatic fixation of the model at any angle position, simultaneously reduce the pneumatic interference influence of the equipment on the test model, and can transmit strong current and weak current signals to the front end of the system, thereby greatly improving the automation degree and the test efficiency of the model.

Description

Main shaft driving mechanism for wind tunnel opening test section rotating system

Technical Field

The invention belongs to the field of wind tunnel tests of aircrafts, and relates to a main shaft driving mechanism for a wind tunnel opening test section rotating system.

Background

The size of the four-meter wind tunnel opening test section is as follows: width × height × length: 4500 × 3500 × 6000(mm), and cross-sectional area of 15.75m²And the maximum test wind speed is 70 m/s. The rotation test system is a dynamic support system commonly used in a four-meter wind tunnel opening test section, and mainly realizes an airplane layout airplane model rotation test with the model size of 2m magnitude, and the maximum rotation speed is 200 rpm. The test model is rapidly rotated around the rotating main shaft by a main shaft driving mechanism of the system, and the traditional main shaft driving mechanism mainly has the following three defects: firstly, the power output is carried out in a bevel gear mode, the transmission links are multiple, the power loss is large, the starting time is long, and the field installation is difficult; secondly, before a static fixed sideslip angle test is carried out, a bolt for rotating the main shaft needs to be screwed up manually, the main shaft is fixed by using a jackscrew, and the test efficiency is low; thirdly, the power electric signal cannot be transmitted to the foremost end of the system in the high-speed rotation process, so that the problem of low power electric signal transmission is solvedThe system cannot realize the automatic angle changing function.

Disclosure of Invention

Based on the defects, the invention aims to provide the main shaft driving mechanism for the wind tunnel opening test section rotating system, which can reduce the power loss in a transmission link, improve the starting time, realize the automatic fixation of the model at any angle position, reduce the pneumatic interference influence of equipment on the test model, transmit strong electric and weak electric signals to the front end of the system and greatly improve the automation degree and the test efficiency of the model.

The invention adopts the following technical scheme: the utility model provides a wind-tunnel opening test section main shaft actuating mechanism for rotary system, including the support axle sleeve, the rotary main shaft, including a motor, an end cap, a controller, and a cover plate, the motor mount pad, shaft coupling and reduction gear, the rotary main shaft is installed in the support axle sleeve, the tail end fixed connection of motor mount pad and support axle sleeve, the motor is installed on the motor mount pad, the motor output shaft loops through the shaft coupling, reduction gear and rotary main shaft coaxial coupling, and this actuating mechanism still includes electromagnetic braking ware, sliding ring and insulating sleeve, the rear end cover of rotary main shaft has electromagnetic braking ware, the inner circle of sliding ring and rotary main shaft's rear end outer wall fixed connection, the outer lane of sliding ring with fix at motor mount pad fixed connection, the inside coaxial insulating sleeve that is fixed with of.

The technical characteristics of the invention are as follows:

1. the front end of the rotating main shaft is provided with a double-row angular contact tapered roller bearing, the middle of the rotating main shaft is provided with a self-aligning roller bearing, and the tail of the rotating main shaft is provided with a double-row cylindrical roller bearing.

2. The motor externally mounted have the heat exchanger unit that looses, the heat exchanger unit and motor mount pad fixed connection that looses.

The invention has the following advantages and beneficial effects: the rotary main shaft can be fixed at any angle position, so that the operation step of fixing the main shaft by manually screwing the bolt in the prior art is omitted; the slip ring arranged on the rotating main shaft can transmit strong current and weak current signals to the front end of the mechanism, so that the automatic angle changing function is realized; the slip ring arranged on the rotating main shaft can transmit strong current and weak current signals to the front end of the mechanism, and a motor reducer arranged at the tail end of the mechanism directly drives the main shaft to rotate, so that the transmission link is reduced, and the power loss is reduced; meanwhile, all components of the spindle driving mechanism special for the rotating system are integrally installed inside the supporting shaft sleeve, so that the spindle driving mechanism can be installed quickly, the influence of the equipment on the pneumatic interference of the test model can be reduced, and the automation degree and the test efficiency of the model are greatly improved.

Drawings

FIG. 1 is a two-dimensional view of a spindle drive mechanism of the present invention;

Detailed Description

The invention is further illustrated by way of example in the accompanying drawings of the specification:

example 1

A main shaft driving mechanism for a wind tunnel opening test section rotating system comprises a supporting shaft sleeve 3, a rotating main shaft 2, a motor 26, a motor mounting seat 17, a coupler 22 and a speed reducer 23, wherein a double-row angular contact tapered roller bearing 1 is mounted on an outer ring of the front end of the rotating main shaft 2, an inner retainer ring 31 and an outer retainer ring 32 of the tapered roller bearing are axially positioned at the front end of the bearing, and a locking nut 30 of the tapered roller bearing and a shaft shoulder of the supporting shaft sleeve 3 are axially positioned at the rear end of the bearing. A self-aligning roller bearing 7 is installed in the middle of the rotating main shaft 2, the inner ring of the self-aligning roller bearing 7 is axially positioned by adopting a self-aligning roller bearing retainer ring 6 and a self-aligning roller bearing locking nut 9, the outer ring of the self-aligning roller bearing 7 is installed in a self-aligning roller bearing installation seat 8, and axial release can be adjusted. The double-row cylindrical roller bearing 12 is installed on the outer ring of the tail portion of the rotating main shaft 2, the double-row cylindrical roller bearing 12 is installed inside the cylindrical roller bearing installation seat 11, the inner retainer ring 29 of the cylindrical roller bearing, the outer retainer ring 28 of the cylindrical roller bearing and the cylindrical roller bearing locking nut 13 are adopted for axial positioning, the cylindrical roller bearing installation seat 11 is fixedly connected with the supporting shaft sleeve 3 through the bolt 14, and the gap is adjusted through the adjusting gasket 15. One end of the electromagnetic brake mounting base 16 is connected with the cylindrical roller bearing mounting base 11, and the other end is connected with the electromagnetic brake 18. An inner ring of a slip ring 19 is fixed on a rotating main shaft 2 through a screw, an outer ring of the slip ring 19 is fixed on a motor mounting seat 17 through a stop pin 20, the motor mounting seat 17 is fixedly connected with a cylindrical roller bearing mounting seat 11, a speed reducer 23 and a motor 26 are mounted at the tail end of the motor mounting seat 17, the output end of the motor 26 is connected with the speed reducer 23, the speed reducer 23 is connected with the rotating main shaft 2 through a coupler 22 and a coupler adapter 21, a heat dissipation cover unit comprises an upper heat dissipation cover 24, a lower heat dissipation cover 25 and a tail heat dissipation cover 27, and the heat dissipation cover unit is mounted on the outer side of the motor 26 to ensure the. The slip ring 19 is respectively connected with the electric signals of the strong current cable and the weak current cable, the insulating sleeve 5 is coaxially and fixedly arranged inside the rotary main shaft 2 through the front snap ring 4 and the rear snap ring 10, and the strong current cable and the weak current cable of the slip ring 19 are effectively guaranteed to be isolated and conveyed to the front end of the mechanism.

The front end of the embodiment is provided with the double-row angular contact tapered roller bearing which can bear radial impact load, and the axial direction is fixed with the tapered roller bearing lock nut through the tapered roller bearing outer retainer ring and the tapered roller bearing inner retainer ring; the center end of the mechanism is provided with a self-aligning roller bearing which mainly plays a role of long shaft self-aligning, and the center end of the mechanism is fixed on a tapered roller bearing locking nut through a tapered roller bearing inner retainer ring in the axial direction; the tail end of the mechanism is provided with a double-row cylindrical roller bearing which mainly bears radial load and can adjust axial clearance caused by system temperature rise; the electromagnetic brake can fix the mechanism at any angle position according to the test requirement; the insulation sleeve is fixed inside the rotary main shaft through a front clamping ring and a rear clamping ring, and a strong current cable and a weak current cable which are led in through the slip ring are isolated and conveyed to the front end of the mechanism; the motor, the reducer and the coupling are arranged at the tail end of the mechanism and can directly drive the rotating main shaft to rotate at a high speed; all components of the mechanism are integrally installed inside the supporting shaft sleeve, and efficient and rapid installation of the system can be realized.

Claims

1. The utility model provides a wind-tunnel opening test main shaft actuating mechanism for section rotating system, includes supporting shaft sleeve, rotating main shaft, motor mount pad, shaft coupling, reduction gear, and rotating main shaft installs in supporting shaft sleeve, and motor mount pad and supporting shaft sleeve's tail end fixed connection, motor install on the motor mount pad, and the motor output shaft loops through shaft coupling, reduction gear and rotating main shaft coaxial coupling, its characterized in that: the double-row angular contact tapered roller bearing is arranged on the outer ring of the front end of the rotating main shaft, the front end of the bearing is axially positioned by adopting an inner retainer ring of the tapered roller bearing and an outer retainer ring of the tapered roller bearing, and the rear end of the bearing is axially positioned by adopting a locking nut of the tapered roller bearing and a shaft shoulder of a supporting shaft sleeve; a self-aligning roller bearing is arranged in the middle of the rotating main shaft, the inner ring of the self-aligning roller bearing is axially positioned by adopting a self-aligning roller bearing retainer ring and a self-aligning roller bearing locking nut, the outer ring of the self-aligning roller bearing is arranged in a self-aligning roller bearing mounting seat, and the axial direction can be adjusted; double-row cylindrical roller bearing is installed to rotatory main shaft's afterbody outer lane, double-row cylindrical roller bearing installs inside the cylindrical roller bearing mount pad, axial positioning adopts the interior retaining ring of cylindrical roller bearing, outer retaining ring of cylindrical roller bearing and cylindrical roller bearing lock nut, the cylindrical roller bearing mount pad passes through bolt and supporting shaft sleeve fixed connection, the clearance is adjusted through the adjusting shim, the rear end cover of rotatory main shaft has electromagnetic braking ware, the inner circle of sliding ring and the rear end outer wall fixed connection of rotatory main shaft, the outer lane and the motor mount pad fixed connection of sliding ring, the inside coaxial insulating sleeve that is fixed with of rotatory main shaft, strong current cable and weak current cable are equipped with in the insulating sleeve.

2. The main shaft driving mechanism for the wind tunnel opening test section rotating system according to claim 1, characterized in that: the motor externally mounted have the heat exchanger unit that looses, the heat exchanger unit and motor mount pad fixed connection that looses.