阅读说明：本技术 一种用于航空惯性试验台的轮胎内压测量装置及方法 (Tire internal pressure measuring device and method for aviation inertia test bed ) 是由 崔雄 王靖 刘颖茜 李宋 王文宇 白钧生 于 2020-05-26 设计创作，主要内容包括：本发明属于试验设备领域,公开了一种用于航空惯性试验台的轮胎内压测量装置及方法。进行轮胎性能分析的同时在轮胎压力超过极限耐压值时,对轮胎进行泄压保护,防止发生爆破。要由气路旋转接头(气滑环)、管路、测压接头、压力传感器等组成。其中气路旋转接头(气滑环)为定子与转子相对转动结构,定子与转子分别有一个气路接口。将旋转接头转子部分与机轮轮毂固定,同时通过管路将轮胎充气嘴与旋转接头转子气路接口连接。将旋转接头定子部分与机轮轴连接固定,同时将测压接头一端与旋转接头定子气路接口连接。最后,将压力传感器固定在测压接头另一端。该方法不仅保证试验精度和安全性,同时有效提高测量实时性、稳定性以及测量精度。(The invention belongs to the field of test equipment, and discloses a tire internal pressure measuring device and method for an aviation inertia test bed. When the tire pressure exceeds the limit pressure resistance value while analyzing the tire performance, the tire is protected by pressure relief, and explosion is prevented. The device consists of a gas path rotary joint (gas slip ring), a pipeline, a pressure measuring joint, a pressure sensor and the like. The air path rotary joint (air slip ring) is a structure in which the stator and the rotor rotate relatively, and the stator and the rotor are respectively provided with an air path interface. The rotor part of the rotary joint is fixed with the wheel hub of the airplane, and the tire inflating nozzle is connected with the air path interface of the rotor of the rotary joint through a pipeline. And connecting and fixing the stator part of the rotary joint with the wheel shaft, and simultaneously connecting one end of the pressure measuring joint with the air path interface of the stator of the rotary joint. And finally, fixing the pressure sensor at the other end of the pressure measuring joint. The method not only ensures the test precision and safety, but also effectively improves the measurement real-time property, the stability and the measurement precision.)

1. The utility model provides a tire internal pressure measuring device for aviation inertia test platform which characterized in that: the device comprises: the gas circuit comprises a gas circuit rotary joint, a pipeline, a pressure measuring joint and a pressure sensor;

the gas circuit rotary joint is provided with two gas circuit interfaces which are communicated with each other;

one end of the pipeline is connected with the tire inflating nozzle, and the other end of the pipeline is connected with an air path interface of the air path rotary joint;

one end of the pressure measuring joint is connected with the other gas path interface of the gas path rotary joint, and the other end of the pressure measuring joint is connected with the pressure sensor;

the pressure sensor is used for monitoring the air pressure in the tire in real time.

2. The tire internal pressure measurement device for an aviation inertia test stand according to claim 1, wherein: the gas circuit rotary joint comprises a stator and a rotor, and the stator and the rotor can rotate relatively.

3. The tire internal pressure measurement device for an aviation inertia test stand according to claim 2, wherein: and a rotor part of the gas circuit rotary joint is provided with a gas circuit interface, and the other end of the pipeline is connected with the gas circuit interface arranged on the rotor.

4. A tire internal pressure measurement device for an aviation inertia test stand according to claim 3, wherein: and a rotor part of the gas circuit rotary joint is fixedly connected with the wheel hub of the airplane.

5. The tire internal pressure measurement device for an aviation inertia test stand according to claim 2, wherein: and the stator part of the gas circuit rotary joint is provided with a gas circuit interface, and one end of the pressure measuring joint is connected with the gas circuit interface arranged on the stator.

6. The tire internal pressure measurement device for the aviation inertia test stand according to claim 5, wherein: and the stator part of the gas circuit rotary joint is fixedly connected with the engine wheel shaft.

7. A tire internal pressure measuring method for an aviation inertia test stand, which is used for the tire internal pressure measuring device for the aviation inertia test stand according to any one of claims 1 to 6, and is characterized in that: the pressure sensor is communicated with the other gas circuit interface of the gas circuit rotary joint, and the real-time measurement of the internal pressure of the tire is completed by measuring the air pressure in the measurement loop.

8. The method for measuring the internal pressure of a tire for an aviation inertia test stand according to claim 7, wherein: the gas circuit rotary joint comprises a stator and a rotor, wherein the stator and the rotor are respectively provided with a gas circuit interface, the two gas circuit interfaces are communicated with each other, the stator is fixedly arranged on a wheel shaft, and the rotor is fixedly connected with the wheel hub to rotate along with the wheel.

Technical Field

The invention belongs to the field of test equipment, and particularly relates to a tire internal pressure measuring device and method for an aviation inertia test bed.

Background

The aviation inertia test bed can test the performances of equipment such as aviation tires and airplane wheel brake devices under actual use conditions, and provides scientific basis for the research, identification and delivery of products.

A typical aviation inertia test bed usually adopts a horizontal structure, and a performance verification test of a wheel is carried out in a mode that the wheel is loaded on the surface of a rotary drum simulating a road surface. In the test process, in order to detect the internal pressure of the tire on line in real time so as to analyze the performance of the tire, and meanwhile, when the pressure of the tire exceeds a limit pressure-resistant value, the pressure of the tire is relieved and protected so as to prevent explosion, and a set of tire internal pressure real-time on-line detection device needs to be designed.

Through research and research in related fields, a pressure sensor is usually installed inside a tire, and a set of wireless transmission device is adopted to realize online detection of the internal pressure of the tire. The method has the following defects: 1. because the pressure measuring sensor is integrally installed in the tire, the pressure measuring sensor synchronously rotates along with the tire. The large centrifugal force generated in the high-speed rotation process can influence the dynamic balance, strength and the like of the tire, thereby not only influencing the test precision, but also generating potential safety hazard; 2. the wireless transmission mode has the defects of signal delay, low stability and the like, and influences the real-time performance and the precision of the tire internal pressure detection.

Disclosure of Invention

The purpose of the invention is as follows:

aiming at the defects of the method, the tire internal pressure detection device and the method for the aviation inertia test bed are designed, so that the performance of the tire is analyzed, and meanwhile, when the pressure of the tire exceeds a limit pressure resistance value, the tire is protected in a pressure relief mode, and the explosion is prevented. The method not only ensures the test precision and safety, but also effectively improves the measurement real-time property, the stability and the measurement precision.

A tire internal pressure detection device and method for an aviation inertia test bed are designed, so that tire performance analysis is carried out, and meanwhile when the tire pressure exceeds a limit pressure resistance value, pressure relief protection is carried out on the tire, and explosion is prevented. The method not only ensures the test precision and safety, but also effectively improves the measurement real-time property, the stability and the measurement precision.

The technical scheme of the invention is as follows:

a tire internal pressure measurement device for an aviation inertia test stand, comprising: the gas circuit comprises a gas circuit rotary joint, a pipeline, a pressure measuring joint and a pressure sensor;

the gas circuit rotary joint is provided with two gas circuit interfaces which are communicated with each other;

one end of the pipeline is connected with the tire inflating nozzle, and the other end of the pipeline is connected with an air path interface of the air path rotary joint;

one end of the pressure measuring joint is connected with the other gas path interface of the gas path rotary joint, and the other end of the pressure measuring joint is connected with the pressure sensor;

the pressure sensor is used for monitoring the tire pressure in real time.

Furthermore, the gas circuit rotary joint comprises a stator and a rotor, and the stator and the rotor can rotate relatively.

Furthermore, a rotor part of the gas circuit rotary joint is provided with a gas circuit interface, and the other end of the pipeline is connected with the gas circuit interface arranged on the rotor.

Furthermore, a rotor part of the gas circuit rotary joint is fixedly connected with the wheel hub of the airplane.

Furthermore, a gas circuit interface is arranged on a stator part of the gas circuit rotary joint, and one end of the pressure measuring joint is connected with the gas circuit interface arranged on the stator.

Furthermore, the stator part of the air path rotary joint is fixedly connected with the engine axle.

The technical scheme of the invention is as follows:

a tire internal pressure measuring method for an aviation inertia test bed is used for the tire internal pressure measuring device for the aviation inertia test bed, an air path rotary joint is mounted on a locomotive shaft, two air path interfaces are formed in the air path rotary joint, the two air path interfaces are communicated internally, an airplane wheel inflating nozzle is communicated with one air path interface of the air path rotary joint to form a measuring loop, a pressure sensor is communicated with the other air path interface of the air path rotary joint, and real-time measurement of tire internal pressure is completed by measuring air pressure in the measuring loop.

Furthermore, the gas circuit rotary joint comprises a stator and a rotor, the stator and the rotor are respectively provided with a gas circuit interface, the two gas circuit interfaces are communicated with each other, the stator is fixedly arranged on the wheel shaft, and the rotor and the wheel hub are fixedly connected and rotate along with the wheel.

THE ADVANTAGES OF THE PRESENT INVENTION

a) According to the invention, the measurement point of the gas pressure in the tire is led out to the external fixed end for measurement, so that the tire rotation and the test precision are not influenced, and the safety is high;

b) the inventive rotary joint (air slip ring) can realize dynamic online detection of tire air pressure and has high real-time performance.

Drawings

FIG. 1 is a schematic view of a tire internal pressure measuring device;

the device comprises a gas path rotary joint 1, a stator 1a, a rotor 1b, a pipeline 2, a pressure measuring joint 3, a pressure sensor 4, a tire inflating nozzle 5, a locomotive axle 6, an aircraft tire 7 and an inertia test bed 8.

Detailed Description

A tire internal pressure measuring device for an aviation inertia test bed is installed at a wheel side hub position of the aviation inertia test bed, and comprises the following components in percentage by weight as shown in figure 1: the gas circuit rotary joint (also known as a gas slip ring), a pipeline, a pressure measuring joint and a pressure sensor.

The air path rotary joint is a structure in which a stator and a rotor rotate relatively, and the stator and the rotor are respectively provided with an air path interface. The pressure measuring joint is a two-way element, two ends of the pressure measuring joint are respectively provided with an air path interface, and the specific installation mode is as follows.

Firstly, fixing a rotor part of the air path rotary joint with a wheel hub of the airplane, and simultaneously connecting a tire inflating nozzle with an air path interface of the rotary joint rotor through a pipeline. And secondly, connecting and fixing the stator part of the rotary joint with the wheel shaft, and simultaneously connecting one end of the pressure measuring joint with the air path interface of the stator of the rotary joint. And finally, fixing the pressure sensor at the other end of the pressure measuring joint.

The working principle of the invention is as follows:

the tire inflation nozzle is communicated with the rotor part of the rotary joint through a pipeline, and then the gas pressure is measured at the stator part of the rotary joint through a pressure sensor. In the test process, the rotor part rotates along with the random wheel, and the stator part is fixed. Because the rotor of the rotary joint is communicated with the stator, the whole measuring loop is communicated with the inside of the tire, and the gas pressure is the same as the gas pressure in the tire. Therefore, the measurement of the internal gas pressure of the tire is indirectly realized by the measurement of the gas pressure at the stator part of the rotary joint.