CN208377049U

CN208377049U - A kind of wheel-ski integral type braking device

Info

Publication number: CN208377049U
Application number: CN201820782260.2U
Authority: CN
Inventors: 魏小辉; 李天童; 梁涛涛; 聂宏; 尹乔之; 张钊
Original assignee: Nanjing University of Aeronautics and Astronautics
Current assignee: Nanjing University of Aeronautics and Astronautics
Priority date: 2018-05-24
Filing date: 2018-05-24
Publication date: 2019-01-15
Anticipated expiration: 2028-05-24

Abstract

The utility model discloses a wheel-skid-integrated braking device, which comprises a wheel, a wheel axle, a brake controller, a rotational speed sensor, a motor support, a sliding skid and at least one actuating module. The actuation module includes a brushless DC motor, N guides, M springs, a reducer, a ball screw, a nut, a nut sleeve and a pressure sensor. The pressure sensor is installed between the nut sleeve and the sled, and can obtain the braking pressure applied to the sled by the actuation module in real time. When braking is required, the motor drives the reducer to rotate, the reducer drives the ball screw, the nut on the lead screw moves linearly under the limit of the guide rail, and positive pressure is applied to the skid, the skid contacts and rubs against the ground, and the aircraft rolls away. Kinetic energy is dissipated in the form of heat, thereby slowing the aircraft. The utility model is small in size and light in weight, and can be applied to a thin-wing hypersonic aircraft that has strict requirements on the size of the braking device of the landing gear.

Description

A kind of wheel-ski integral type braking device

Technical field

The utility model relates to be suitable for the technical field of hypersonic aircraft running landing brake, more particularly to it is a kind of Wheel-ski integral type braking device.

Background technique

Hypersonic aircraft is the aircraft that can be carried out hypersonic flight, and there is quick response, superpower dash forward to prevent, flexibly The features such as motor-driven is a kind of new concept weapon for having both strategic deterrence and application in actual combat ability.This aircraft is mainly used for holding Row force projection, specific region investigation and monitoring, implement ground strike and defence, provide information support, attack weapon and strategy The tasks such as platform are delivered, there is high military value.

This kind of aircraft has some master-plans outstanding and the design contradiction of landing system to be difficult to coordinate.On the one hand, high The aerodynamic configuration of supersonic aircraft is mainly waverider-derived and blended wing-body configuration, and this kind of aerodynamic configuration is typically characterised by Fuselage wing is thin, and inner space is small, is unfavorable for the folding and unfolding arrangement of undercarriage；And fuel needed for hypersonic aircraft and power Device accounts for body major part space, also affects the arrangement of undercarriage.In early period, the exploration of some hypersonic aircrafts is ground In studying carefully, it has to sacrifice aeroperformance master-plan index to meet the collection space of take-off and landing device, largely reduced aircraft Overall performance and operational exertion efficiency.On the other hand, high velocity of approach is used when hypersonic aircraft lands, this will lead to Higher landing load, while the limitation of tire critical speed increases airplane wheel size, brake system and its auxiliary system Increase weight and space requirement to absorb more horizontal kinetic energy.

Traditional take-off and landing device is braked using water brake, but in order to absorb the sliding energy of running of aircraft, the volume of brake disc is past It is past relatively large, and inconvenience is stowed in aircraft body.In order to reduce take-off and landing device for folding and unfolding space and construction weight The X-15A of design limitation, the U.S. is landed using ski type, carries out retarding braking by the friction on sled and ground.It is this kind of to rise and fall Structure space shared by device is small, the landing horizontal velocity of superhigh temperature resistant environment and superelevation, and has lighter construction weight.But Ski type landing gear is not particularly suited for the aircraft for needing to take off.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of wheel for defect involved in the prior art Sledge integral type braking device effectively reduces the size and weight and the brake system for realizing aircraft of aircraft landing system It is dynamic.

The utility model uses following technical scheme to solve above-mentioned technical problem:

A kind of wheel-ski integral type braking device includes wheel, wheel shaft, brake controller, speed probe, motor branch Frame, sled and at least one actuation module；

The wheel is connected by bearing with the wheel shaft；

The speed probe is used to measure the revolving speed of the wheel, and passes it to the brake controller；

The electric machine support and the wheel shaft are fixedly linked；

The actuation module includes brshless DC motor, N number of guide rail, M root spring, retarder, ball-screw, nut, spiral shell Mother sleeve and pressure sensor, described N, M are the integer more than or equal to 4；

The brshless DC motor is fixed on the electric machine support, and the input terminal of output shaft and the retarder is solid Even；

The upper end of the output end of the retarder and the ball-screw is fixedly linked；

N number of guide rail is arranged in parallel with the ball-screw, and the upper end is connected with the electric machine support；

The nut and the ball-screw are threadedly coupled, and are corresponded to N number of guide rail on nut and be equipped with N number of through-hole, described N number of Guide rail passes through the nut by N number of through-hole, and nut is slided along N number of guide rail；

Described equal one end of M root spring and the electric machine support are connected, and the other end is connected with the nut, for preventing spiral shell Female sliding downwards under the effect of gravity；

The ut socket upper end and the nut are connected, and lower end passes through the upper end of the pressure sensor and the sled Face is connected；

The lower end of N number of guide rail is equipped with limiting device, can under the drive of nut for limiting the ut socket The maximum distance moved to the ground；

The brake controller respectively with the speed probe, the brshless DC motor of each actuation module and each The pressure sensor of a actuation module is electrically connected, for when receiving brake command according to speed probe and each actuation The sensed data of the pressure sensor of module controls the brshless DC motor work of each actuation module.

As a kind of further prioritization scheme of wheel-ski integral type braking device of the utility model, the retarder and Ball is stated lead screw and is connected using hook mode, and is fixed in junction by clip.

As a kind of further prioritization scheme of wheel-ski integral type braking device of the utility model, the revolution speed sensing Device uses hollow axle sensor, the hollow shaft of hollow axle sensor is connected by shaft coupling with wheel, wheel drive it is next Rotation is played, the shell of hollow axle sensor is connected by mounting rack and wheel shaft, and discord wheel rotates together.

As a kind of further prioritization scheme of wheel-ski integral type braking device of the utility model, the sled it is upper Surface is equipped with thermal insulation layer, to prevent from transferring heat to the ut socket of each actuation module.

The invention also discloses a kind of control methods based on the wheel-ski integral type braking device, comprising following Process:

After aircraft lands, brake controller receive braking commands, control brshless DC motor drives retarder rotation, Retarder drives ball-screw rotation, and the nut on ball-screw moves in a straight line under the limitation of guide rail freedom degree, so that nut Sleeve applies normal pressure to sled, and sled compresses ground, and with ground face contact friction, the kinetic energy that aircraft is advanced is with the shape of thermal energy Formula dissipates, to make aircraft down；

Speed probe, pressure sensor constantly give the pressure feedback between the revolving speed of wheel, ut socket and sled Brake controller, adjustment provides corresponding motor signal to brake controller in real time accordingly, to guarantee aircraft uniformly retarded motion.

The utility model compared with the prior art by using the above technical solution, has following technical effect that

Brake weight required for 1. the utility model is generated by the friction on sled and ground, it is no longer necessary to bulky work Dynamic cylinder and brake disc component, reduce undercarriage wheel add weight as appended by brake gear.

2. the utility model can reduce the additional wheel volume as brought by conventional brake device, make wheel size It is only limited by course speed, the function of aircraft takeoff is remained while reducing volume.

3. the utility model provides controlled brake pressure, the design of wheel-ski integral type makes this brake gear in snowfield, muddy ground Etc. landing under various complex road conditions and brake, the requirement of aircraft against land route condition is substantially reduced.

Detailed description of the invention

Fig. 1 is this aircraft brake brake device structure schematic diagram；

Fig. 2 is electromechanical assemblies scheme of installation；

Fig. 3 is speed probe scheme of installation.

In figure, 1- electric machine support, 2- wheel shaft, 3- brake controller, 4- brshless DC motor, 5- guide rail, 6- retarder, 7- Spring, 8- clip, 9- ball-screw, 10- nut, 11- ut socket, 12- limiting device, 13- pressure sensor, 14- are heat-insulated Layer, 15- sled, 16- wheel, 17- motor shaft, the axis of 18- retarder, 19- shaft coupling, 20- speed probe, 21- mounting rack.

Specific embodiment

The technical solution of the utility model is described in further detail with reference to the accompanying drawing:

The utility model can be embodied in many different forms, and should not be assumed that be limited to the embodiments described herein. On the contrary, it is thorough and complete to these embodiments are provided so that the disclosure, and this reality will be given full expression to those skilled in the art With novel range.In the accompanying drawings, for the sake of clarity it is exaggerated component.

As shown in Figure 1, including wheel, wheel shaft, brake the utility model discloses a kind of wheel-ski integral type braking device Vehicle controller, speed probe, electric machine support, sled and at least one actuation module.

Wheel is connected by bearing with wheel shaft；Speed probe is used to measure the revolving speed of wheel, and passes it to brake Controller；Electric machine support and wheel shaft are fixedly linked.

As shown in Fig. 2, actuation module includes brshless DC motor, N number of guide rail, M root spring, retarder, ball-screw, spiral shell Female, ut socket and pressure sensor, N, M are the integer more than or equal to 4.

Brshless DC motor is fixed on electric machine support, and the input terminal of output shaft and retarder is connected；Retarder it is defeated The upper end of outlet and ball-screw is fixedly linked.

N number of guide rail is arranged in parallel with ball-screw, and the upper end is connected with electric machine support；Nut and ball-screw screw thread Connection, and correspond to N number of guide rail on nut equipped with N number of through-hole, N number of guide rail across nut, enable nut edge by N number of through-hole The sliding of N number of guide rail.

The equal one end of M root spring and electric machine support are connected, and the other end is connected with nut, for preventing nut in self gravity Under the action of slide downwards.

Ut socket upper end and nut are connected, and lower end is connected by the upper surface of pressure sensor and sled.

The lower end of N number of guide rail is equipped with limiting device, can move to the ground under the drive of nut for limiting ut socket Dynamic maximum distance.As can be seen from Figure 2 coming, ut socket can be set to the appearance of upper coarse and lower fine two cylinders composition, Limiting device only needs to be arranged to the ring of radius of the radius less than thick cylinder, the radius greater than thin cylinder.

Brake controller respectively with speed probe, each actuation module brshless DC motor and each make dynamic model The pressure sensor of block is electrically connected, for when receiving brake command according to the pressure of speed probe and each actuation module The sensed data of force snesor controls the brshless DC motor work of each actuation module.

Retarder is stated lead screw with ball and is connected using hook mode, and is fixed in junction by clip.

As shown in figure 3, speed probe uses hollow axle sensor, the hollow shaft of hollow axle sensor by shaft coupling with Wheel is connected, rotates together under the drive of wheel, and the shell of hollow axle sensor is connected by mounting rack and wheel shaft, machine of getting along well Wheel rotates together.

The upper surface of sled is equipped with thermal insulation layer, to prevent from transferring heat to the ut socket of each actuation module.

Those skilled in the art can understand that unless otherwise defined, all terms used herein (including skill Art term and scientific term) there is meaning identical with the general understanding of those of ordinary skill in the utility model fields Justice.It should also be understood that those terms such as defined in the general dictionary should be understood that with upper with the prior art The consistent meaning of meaning hereinafter, and unless defined as here, will not with idealization or meaning too formal come It explains.

Above-described specific embodiment, to the purpose of this utility model, technical scheme and beneficial effects carried out into One step is described in detail, it should be understood that being not used to limit the foregoing is merely specific embodiment of the present utility model The utility model processed, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done, It should be included within the scope of protection of this utility model.

Claims

1. A wheel-skid-integrated braking device, characterized in that it comprises a wheel, an axle, a brake controller, a rotational speed sensor, a motor support, a skid, and at least one actuating module;

the wheel is connected with the axle through a bearing;

The rotational speed sensor is used to measure the rotational speed of the wheel and transmit it to the brake controller;

the motor bracket is fixedly connected with the wheel axle;

The actuating module includes a brushless DC motor, N guide rails, M springs, a reducer, a ball screw, a nut, a nut sleeve and a pressure sensor, where N and M are both integers greater than or equal to 4;

The brushless DC motor is fixed on the motor support, and its output shaft is fixedly connected with the input end of the reducer;

The output end of the reducer is fixedly connected to the upper end of the ball screw;

The N guide rails are all arranged in parallel with the ball screws, and the upper ends thereof are all fixedly connected with the motor support;

The nut and the ball screw are threadedly connected, and N through holes are provided on the nut corresponding to the N guide rails, and the N guide rails pass through the nut through the N through holes, so that the nut can pass along the N guide rails. slide rails;

One end of the M springs is fixedly connected with the motor bracket, and the other end is fixedly connected with the nut, so as to prevent the nut from sliding down under the action of its own gravity;

The upper end of the nut sleeve is fixedly connected with the nut, and the lower end is fixedly connected with the upper end surface of the sliding skid through the pressure sensor;

The lower ends of the N guide rails are provided with a limiting device, which is used to limit the maximum distance that the nut sleeve can move to the ground under the driving of the nut;

The brake controller is respectively electrically connected with the rotational speed sensor, the brushless DC motor of each actuation module, and the pressure sensor of each actuation module, and is used for receiving the braking command according to the rotational speed sensor and each actuation module. The sensing data of the pressure sensor controls the brushless DC motor of each actuation module to work.

2 . The wheel-skid-integrated braking device according to claim 1 , wherein the speed reducer and the ball screw are connected by a hook, and are fixed at the connection by a clamp. 3 .

3. The wheel-skid-integrated braking device according to claim 1, wherein the rotational speed sensor adopts a hollow shaft sensor, and the hollow shaft of the hollow shaft sensor is connected to the wheel through a coupling, and the hollow shaft of the hollow shaft sensor is connected to the wheel through a coupling. Driven to rotate together, the shell of the hollow shaft sensor is fixedly connected with the wheel shaft through the mounting frame, and does not rotate with the wheel.

4. The wheel-skid-integrated braking device according to claim 1, wherein the upper surface of the skid is provided with a heat insulation layer to prevent the skid from transferring heat to the nut sleeves of each actuating module cylinder.