CN115817804A - Novel dual-redundancy electric actuating cylinder - Google Patents

Abstract

The invention discloses a novel dual-redundancy electric actuating cylinder, which is characterized in that two groups of driving devices, a worm gear, a piston rod, an outer cylinder and a displacement sensor are matched, a landing gear retractable actuating cylinder and a flap actuator cylinder are convenient to adopt a full-electric dual-redundancy design, the safety of a system can be improved, the light weight of the whole machine is realized, the cost is low, the control precision is high, the later maintenance is convenient, the electric actuating cylinder adopts the dual-redundancy design, under the normal condition, double motors work simultaneously, if one path of power supply, a control driver or the motor fails, the other path of power supply, the control driver and the motor can still work normally to complete the actuation, the safe and reliable operation of the system is ensured, the displacement sensor and the two groups of driving devices are matched, the electric actuating cylinder adopts electric control and electric execution, the control precision is high, the response speed is high, the BIT self-checking means is convenient, the system failure can be quickly detected and positioned, special equipment is not needed for the later maintenance, and the cost is low.

Description

A New Type Double Redundancy Electric Actuator

technical field

The invention belongs to the technical field of mechanical equipment actuation, and in particular relates to a novel double-redundancy electric actuation cylinder.

Background technique

Aircraft landing gear and flaperon, as an important component unit for aircraft take-off, landing, turning, pitching and other attitude adjustments, determine whether the aircraft can take off, land and fly safely. As an important part of the aircraft's flight attitude adjustment, the aileron actuator is one of the core components of the aircraft movement. Therefore, the failure of the landing gear retractable actuator and the flaperon actuator directly affects the safety of the aircraft; Traditional hydraulic landing gear retractable actuators and flaperon actuators need to be equipped with a hydraulic system, which is costly and heavy. If a redundant design is used, the cost and weight of the entire aircraft will be increased, and the subsequent maintenance costs will be high .

To this end, we propose a new type of double-redundant electric actuator to solve the problems in the existing technology. The landing gear retractable actuator and the flaperon actuator adopt an all-electric double-redundant design, which can improve the system Safety, realize the light weight of the whole machine, low cost, and high control precision, which is convenient for later maintenance.

Contents of the invention

The purpose of the present invention is to provide a new type of double-redundant electric actuator to solve the problem of high cost and heavy weight in the prior art proposed in the above-mentioned background technology. If redundant design is used, the cost and weight of the whole aircraft will be increased, and The problem of high maintenance costs in the later period.

To achieve the above object, the present invention adopts the following technical solutions:

A new type of double-redundancy electric actuator, including a reduction box body, one side of the reduction box body is fixedly connected with end cover ear pieces by multiple sets of hexagonal bolts, and the end cover ear pieces are provided with a second Ball bearing, the other side of the reduction box body is fixedly connected with an outer cylinder through multiple sets of hexagonal bolts, an inner gasket is arranged between the outer cylinder and the reduction box body, and a Two sets of worm gears, two sets of worms, two sets of first bearings, second bearings and epicyclic gears, the two sets of first bearings are arranged at opposite ends of the two sets of worm wheels, and the second bearings are set at the opposite end of the two sets of worm wheels , the other side of the reduction box body is provided with two groups of driving devices, the driving devices of the two groups are DC motors, and the output shafts of the two groups of driving devices are provided with bevel gears, and the bevel gears of the two groups of Shaped gears mesh with two groups of worms, the two groups of worms mesh with two groups of worm wheels, the epicyclic gears mesh with two groups of worm wheels, the epicyclic gears are connected with ball screws, and the ball screws are arranged in the outer cylinder A screw nut is threadedly connected to one end of the ball screw, and the outer wall of the screw nut is covered with a piston rod, and the side wall of the piston rod is covered with a bushing, and the bushing is arranged at one end of the outer cylinder.

Preferably, one end of one set of worm wheels is provided with a base, and one end of the other set of worm wheels is provided with a third bearing, the ball screw is plugged into the inner wall of the third bearing, and the ball screw is connected to the third bearing. Bearing transmission connection, a bearing sleeve is arranged in the box body of the reduction box, and the third bearing is installed in the inner cavity of the bearing sleeve.

Preferably, one end of the outer cylinder is provided with an end cover body, and the end cover body is fixedly connected to one end of the outer cylinder through multiple sets of hexagonal bolts, and one side of the end cover body is provided with a round hole for plugging in the piston rod , and the inner wall of the circular hole is provided with a shaft sleeve.

Preferably, the bushing is set on the side wall of the piston rod, and the inner wall of the bushing is slidably connected to the outer wall of the piston rod, one end of the bushing is in conflict with one end of the bushing, and one side of the end cover body is integrated A protruding block is formed, and a through hole for insertion of the displacement sensor is opened on one side of the protruding block.

Preferably, one end of the displacement sensor is installed on the outer cylinder and the fixed end of the reduction box body, and the displacement sensor is arranged between two groups of driving devices, one end of the piston rod is provided with a joint, and the side wall of the joint is provided with a stopper. Turn the nut.

Preferably, the other end of the displacement sensor is fixedly connected with an anti-rotation washer, one end of the joint is inserted through the anti-rotation washer to one end of the piston rod, and one side of the anti-rotation washer is connected to the anti-rotation nut. One side conflicts, and the inner wall of the joint is equipped with a first ball bearing.

Preferably, both sides of the reduction box body are fixedly connected with maintenance windows through multiple sets of hexagonal bolts, and the maintenance windows of the two groups are all set on arc-shaped plates, and the two groups of maintenance windows are respectively in the shape of two groups of bevel gears. corresponding settings.

Preferably, the two groups of driving devices are connected in series through two groups of worms, and both groups of driving devices are electrically connected to the displacement sensor.

Preferably, the axis of the ball screw and the axis of the piston rod are arranged on the same straight line, and the ball screw is slidably connected to the piston rod through a screw nut.

Preferably, the piston rod is in sliding connection with the outer cylinder, one end of the piston rod is fixedly connected with the screw nut, and the ball screw is in transmission connection with the third bearing.

Compared with the prior art, a new double-redundant electric actuator proposed by the present invention has the following advantages:

1. The present invention is mainly through the cooperation between two sets of driving devices, worm gears, piston rods, outer cylinders and displacement sensors, so that the actuating cylinder for retracting and retracting the landing gear and the flaperon actuating cylinder adopt an all-electric double-redundancy design, It can improve the safety of the system, realize the lightweight and low cost of the whole machine, and the control accuracy is high, which is convenient for later maintenance. The electric actuator adopts a double redundancy design. If the driver or motor fails, the other power supply, control driver and motor can still work normally and complete the action to ensure the safe and reliable operation of the system;

2. Through the cooperation between the displacement sensor and two groups of driving devices, the electric actuator adopts telex control, electric execution, high control precision, fast response speed, easy to use BIT self-inspection means, and system failure can be quickly detected and contacted. Positioning, and later maintenance does not require special equipment, easy maintenance and low cost;

3. In the present invention, through the cooperation between the piston rod, the outer cylinder, the ball screw and the screw nut, the traditional hydraulic cylinder needs to be equipped with a hydraulic source and a hydraulic system. The system is complex, costly and heavy, while the electric actuator The barrel structure is simple and reliable, and the power supply of the aircraft system is used, which can reduce the weight and cost of the whole machine.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present invention;

Fig. 2 is the sectional structure schematic diagram of the present invention;

Fig. 3 is the schematic diagram of the cross-sectional structure of the gearbox of the present invention;

FIG. 4 is a schematic diagram of the enlarged structure at A in FIG. 2 .

In the figure: 1. Reduction box body; 2. Maintenance window; 3. Driving device; 4. Outer cylinder; 5. End cover body; 6. Shaft sleeve; 7. Piston rod; 8. Displacement sensor; Gasket; 10, anti-rotation nut; 11, joint; 12, first ball bearing; 13, end cover lug; 14, second ball bearing; 15, first bearing; 16, epicyclic gear; 17, worm ;18, second bearing; 19, worm gear; 20, bearing sleeve; 21, inner gasket; 22, third bearing; 23, ball screw; 24, screw nut; 25, bushing; 26, bevel gear .

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The specific embodiments described here are only used to explain the present invention, not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The present invention provides a new type of double-redundancy electric actuator as shown in Figures 1-4, including a reduction box body 1, one side of the reduction box body 1 is fixedly connected with an end cover by multiple sets of hexagonal bolts An ear piece 13, a second ball bearing 14 is arranged inside the end cover ear piece 13, and the other side of the reduction box body 1 is fixedly connected with an outer cylinder 4 through a plurality of sets of hexagonal bolts, and the outer cylinder 4 is connected with the Inner gaskets 21 are arranged between the gearbox casings 1, and two sets of worm gears 19, two sets of worms 17, two sets of first bearings 15, second bearings 18 and epicyclic gears 16 are installed inside the reduction gearbox casings 1, The two groups of first bearings 15 are arranged at opposite ends of the two groups of worm wheels 19, the second bearings 18 are arranged at the opposite end of the two groups of worm wheels 19, and the other side of the reduction box body 1 is provided with two groups of driving Device 3, the driving devices 3 of the two groups are DC motors, and the output shafts of the two groups of driving devices 3 are provided with bevel gears 26, and the bevel gears 26 of the two groups are meshed with the two groups of worms respectively, and the two groups The worm 17 meshes with two sets of worm wheels 19 respectively, and the epicyclic gear 16 meshes with two sets of worm wheels 19. The epicyclic gear 16 is connected with a ball screw 23, and the ball screw 23 is arranged in the outer cylinder 4. One end of the ball screw 23 is threadedly connected with a screw nut 24, and the outer wall of the screw nut 24 is provided with a piston rod 7, and the side wall of the piston rod 7 is provided with a bushing 25, and the bushing 25 is arranged on the outer cylinder. 4 inside one end.

During use, two groups of driving devices 3 are all DC motors, and the two groups of DC motors realize the reduction of rotating speed and the amplification of torque through transmission mechanisms such as two groups of worm gears 19, two groups of worms 17, and epicyclic gear 16, and then drive the ball screw 23 Rotate, thereby drive the lead screw nut 24 of circumferential braking to realize linear reciprocating motion, the lead screw nut 24 of linear motion is connected with piston rod 7, finally drives piston rod 7 to reciprocate, realizes the effect on aircraft landing gear and flaperon At the same time, the DC motor is controlled and driven by the controller through the signal fed back by the linear displacement sensor 8. The electric actuator adopts a double redundancy design, and the piston rod is jointly driven by two motors through the epicyclic train and the ball screw 23. 7 reciprocating motion, and the worm gear 17 adopts a self-locking design to ensure that the rotation of the two motors is independent of each other. The two motors can be controlled and driven by two independent power supplies and control drivers on the aircraft. Under normal circumstances, the two motors work at the same time , jointly drive the reciprocating motion of the piston rod 7, if one power supply, control driver or motor fails, the other power supply, control driver and motor can still work normally and complete the action, ensuring safe and reliable operation of the system, which can improve system security , to achieve light weight and low cost of the whole machine, and high control precision, which is convenient for later maintenance.

One end of one group of the worm wheels 19 is provided with a base, and one end of the other group of worm wheels 19 is provided with a third bearing 22, the ball screw 23 is plugged into the inner side wall of the third bearing 22, and the ball screw 23 It is connected in transmission with the third bearing 22 , a bearing sleeve 20 is arranged inside the reduction box body 1 , and the third bearing 22 is installed in the inner cavity of the bearing sleeve 20 .

One end of the outer cylinder 4 is provided with an end cap body 5, and the end cap body 5 is fixedly connected with one end of the outer cylinder 4 through multiple sets of hexagonal bolts, and one side of the end cap body 5 is provided with a round hole for plugging the piston rod 7, And the inner wall of the circular hole is provided with a shaft sleeve 6, which facilitates the connection of the piston rod 7, reduces the frictional force of the piston rod 7 stretching, and increases the service life.

The shaft sleeve 6 is sleeved on the side wall of the piston rod 7, and the inner wall of the shaft sleeve 6 is slidingly connected with the outer wall of the piston rod 7. One end of the shaft sleeve 6 is in conflict with one end of the bushing 25, and one side of the end cover body 5 is integrally formed. There is a bump, and one side of the bump is provided with a through hole for the insertion of the displacement sensor 8, through the displacement sensor 8, it is convenient to control the DC motor, and the two sets of DC motors are controlled and driven by the controller through the signal fed back by the displacement sensor 8 .

One end of the displacement sensor 8 is installed on the outer cylinder 4 and the fixed end of the reduction box body 1, and the displacement sensor 8 is arranged between the two groups of driving devices 3, and one end of the piston rod 7 is provided with a joint 11, and the side wall of the joint 11 is provided with The anti-rotation nut 10 is convenient to control the braking distance of the aircraft, so as to complete the landing.

The other end of the displacement sensor 8 is fixedly connected with the anti-rotation washer 9, and one end of the joint 11 penetrates the anti-rotation washer 9 and is inserted into one end of the piston rod 7, and one side of the anti-rotation washer 9 is connected to one side of the anti-rotation nut 10 In contrast, the inner wall of the joint 11 is provided with a first ball bearing 12 to increase the strength of the bottom end of the landing gear, thereby increasing its service life.

Both sides of the reduction box body 1 are fixedly connected with maintenance windows 2 through multiple sets of hexagonal bolts, and the two groups of maintenance windows 2 are set on arc-shaped plates, and the two groups of maintenance windows 2 are respectively arranged correspondingly to the two groups of bevel gears 26 , opening the maintenance window 2 is convenient for regular maintenance and overhaul to the inside of the reduction box body 1 .

The two groups of driving devices 3 are connected in series through two groups of worms 17, and the two groups of driving devices 3 are electrically connected to the displacement sensor 8, so as to increase the integrity of the actuator, thereby reducing the friction between the components inside the reduction box 1 , Increase the service life of each component and improve the accuracy.

The axis of the ball screw 23 and the axis of the piston rod 7 are arranged on the same straight line, and the ball screw 23 is slidably connected with the piston rod 7 through the screw nut 24, which increases the connection accuracy between the parts, Thereby improving the response speed.

The piston rod 7 is in sliding connection with the outer cylinder 4, one end of the piston rod 7 is fixedly connected with the screw nut 24, and the ball screw 23 is in transmission connection with the third bearing 22, the structure is simple and reliable.

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still It is possible to modify the technical solutions recorded in the foregoing embodiments, or to perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present invention shall be included in the within the protection scope of the present invention.

Claims (10)

1. The utility model provides a novel dual-redundancy electric actuator cylinder, includes reducing gear box (1), its characterized in that: one side of the reduction gearbox body (1) is fixedly connected with an end cover lug (13) through a plurality of groups of hexagon bolts, a second ball bearing (14) is arranged in the end cover lug (13), the other side of the reduction gearbox body (1) is fixedly connected with an outer barrel (4) through a plurality of groups of hexagon bolts, an inner gasket (21) is arranged between the outer barrel (4) and the reduction gearbox body (1), two groups of worm gears (19), two groups of worms (17), two groups of first bearings (15), a second bearing (18) and a turnover gear (16) are arranged in the reduction gearbox body (1), the two groups of first bearings (15) are arranged at the opposite ends of the two groups of worm gears (19), the second bearing (18) is arranged at one end of the two groups of worm gears (19) which are in contact, two groups of driving devices (3) are arranged at the other side of the reduction gearbox body (1), the two groups of driving devices (3) are both direct current motors, two groups of bevel gears (26) are arranged on output shafts of the two groups of driving devices (3), the bevel gears (26) are respectively engaged with the two groups of worm gears (17), the two groups of worm gears (16) are respectively engaged with the two groups of worm gears (23), and the ball screws (23) are connected with the outer barrel (23), one end threaded connection of ball (23) has screw nut (24), and the outer wall cover of screw nut (24) is equipped with piston rod (7), the lateral wall cover of piston rod (7) is equipped with bush (25), and bush (25) set up the one end in urceolus (4).

2. The novel dual redundancy electric ram of claim 1, wherein: one end of the worm wheel (19) is provided with a base, one end of the other worm wheel (19) is provided with a third bearing (22), the ball screw (23) is inserted into the inner side wall of the third bearing (22), the ball screw (23) is in transmission connection with the third bearing (22), a bearing sleeve (20) is arranged in the reduction gearbox box body (1), and the third bearing (22) is arranged in the inner cavity of the bearing sleeve (20).

3. The novel dual redundancy electric ram of claim 1, wherein: the one end of urceolus (4) is provided with end cover body (5), and end cover body (5) pass through the one end fixed connection of multiunit hex bolts and urceolus (4), the round hole that supplies piston rod (7) to peg graft is seted up to one side of end cover body (5), and the inner wall of round hole is provided with axle sleeve (6).

4. A novel dual redundancy electric ram as claimed in claim 3, wherein: the lateral wall at piston rod (7) is established to axle sleeve (6) cover, and the outer wall sliding connection of axle sleeve (6) inner wall and piston rod (7), the one end of axle sleeve (6) is inconsistent with the one end of bush (25), one side integrated into one piece of end cover body (5) has the lug, and the through-hole that supplies displacement sensor (8) to peg graft is seted up to one side of lug.

5. The novel dual redundancy electric ram of claim 4, wherein: one end of the displacement sensor (8) is arranged at one fixed end of the outer cylinder (4) and the reduction gearbox body (1), the displacement sensor (8) is arranged between the two sets of driving devices (3), one end of the piston rod (7) is provided with a joint (11), and the side wall of the joint (11) is provided with a rotation stopping nut (10).

6. The novel dual redundancy electric ram of claim 5, wherein: the other end of the displacement sensor (8) is fixedly connected with a rotation stopping gasket (9), one end of a joint (11) penetrates through the rotation stopping gasket (9) and is connected to one end of the piston rod (7) in an inserting mode, one side of the rotation stopping gasket (9) is abutted to one side of a rotation stopping nut (10), and a first ball bearing (12) is installed on the inner wall of the joint (11).

7. The novel dual redundancy electric ram of claim 1, wherein: reduction box (1) is two sets of maintenance windows (2) through multiunit hexagon bolt fixedly connected with one side adjacent with the end cover auricle, and is two sets of maintenance window (2) are the arc setting, and two sets of maintenance windows (2) are corresponding the setting with two sets of conical gear (26) respectively.

8. The novel dual redundancy electric ram of claim 1, wherein: the two sets of driving devices (3) are connected in series through two sets of worms (17), and the two sets of driving devices (3) are electrically connected with the displacement sensor (8).

9. The novel dual redundancy electric ram of claim 1, wherein: the axle center of the ball screw (23) and the axle center of the piston rod (7) are arranged on the same straight line, and the ball screw (23) is connected with the piston rod (7) in a sliding mode through a screw nut (24).

10. The novel dual redundancy electric ram of claim 9, wherein: the piston rod (7) is in sliding connection with the outer barrel (4), one end of the piston rod (7) is fixedly connected with the screw nut (24), and the ball screw (23) is in transmission connection with the third bearing (22).

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