CN-122014770-A - Brake disc of aviation brake wheel

Abstract

The invention discloses a brake disc of an aviation brake wheel, and particularly relates to the field of aviation brake wheel braking. The powder alloy plate comprises an annular flat plate, a plurality of fan-shaped through holes are formed in the circumferential direction, bosses are respectively formed on two radially opposite side walls of the through holes, two powder alloy fan-shaped plates are arranged in each through hole, each powder alloy fan-shaped plate comprises a fan-shaped first fixing plate, one surface of each first fixing plate is covered with a powder alloy layer, the other surface of each first fixing plate is connected with a second fixing plate, the size length of each second fixing plate is smaller than that of each first fixing plate, steps are formed on two opposite sides of each second fixing plate, the two second fixing plates are connected through a connecting piece, grooves matched with the bosses are formed between the two first fixing plates, and the bosses are located in the grooves. Through above-mentioned brake disc, the circumference is born by little skeleton and big skeleton jointly when stopping, and the connecting piece of connecting two powder alloy fan-shaped pieces does not receive the shearing force, can not appear the fastener fracture problem.

Inventors

• LOU JINTAO
• ZHANG WANSHUN
• ZHANG YI
• LIU GANG
• REN JINGSHENG
• XIE WEN

Assignees

• 西安航空制动科技有限公司

Dates

Publication Date

20260512

Application Date

20260313

Claims (6)

1. 1. A brake rotor for an aircraft brake wheel, comprising: The annular flat plate is provided with a plurality of fan-shaped through holes along the circumferential direction, and two radially opposite side walls of the through holes are respectively provided with a boss; Two powder alloy fan-shaped pieces are arranged in each through hole; The powder alloy fan-shaped sheet comprises a fan-shaped first fixing plate, one surface of the first fixing plate is covered with a powder alloy layer, the other surface of the first fixing plate is connected with a second fixing plate, the size length of the second fixing plate is smaller than that of the first fixing plate, and steps are formed on two opposite sides of the second fixing plate; The two second fixing plates are connected through the connecting piece, a groove matched with the boss is formed between the two first fixing plates, and the boss is located in the groove.
2. 2. The brake rotor of an aircraft brake rotor of claim 1, wherein the thickness of the flat plate is greater than twice the total thickness of the first and second retaining plates and less than twice the thickness of the powder alloy segments.
3. 3. The disc of claim 1, wherein the step height is greater than 0.5 times the thickness of the boss and the difference is 0.02-0.05mm.
4. 4. The brake rotor of an aircraft brake wheel according to claim 1, wherein the connector comprises a rivet bar extending through the two powder alloy segments and a sleeve sleeved on the outside of the rivet bar.
5. 5. The brake disc of the aircraft brake wheel according to claim 4, wherein the riveting rod comprises a frustum, the small diameter end of the frustum is sequentially connected with a connecting rod and a ring table, a blind hole is formed in the ring table, and the outer diameter of the ring table is smaller than that of the connecting rod; the total length of the connecting rod and the annular table is equal to the length of the sleeve; The sleeve comprises a conical first sleeve, and the small diameter end of the first sleeve is connected with a second sleeve; the first sleeve and the second sleeve are correspondingly sleeved on the outer sides of the annular table and the connecting rod, and the annular table is attached to the inner side of the first sleeve through riveting.
6. 6. The brake rotor of an aircraft brake rotor of claim 5, wherein the powder alloy segments are provided with a plurality of rivet holes; in each through hole, the frustum is positioned in a countersunk head hole of the rivet hole of one of the powder alloy fan-shaped sheets, and the first sleeve is positioned in a countersunk head hole of the rivet hole of the other powder alloy fan-shaped sheet.

Description

Brake disc of aviation brake wheel Technical Field The invention relates to the field of aviation brake wheel braking, in particular to a brake disc of an aviation brake wheel. Background Because of the requirement of aircraft lift-off, the weight and volume requirements of all accessories are very strict. The goal of modern aircraft brake wheel technology is to design greater braking capacity under limited space and weight constraints. Aviation brake wheels generally consist of a wheel assembly and a brake device. In the use process of the brake wheel, a movable brake disc on the brake device is matched with a guide rail of the wheel assembly and synchronously rotates relative to the landing gear shaft, and a static brake disc on the brake device is static relative to the landing gear shaft. When a pilot uses the brake, the dynamic brake disc and the static brake disc are mutually pressed under the action of the piston to generate braking moment, so that the aircraft brake is realized. The powder alloy brake disc is a structure with wider application range, and the commonly used powder alloy brake disc is divided into an integral sintering type structure and a small riveting type structure, wherein the small riveting type structure has more application scenes due to convenient use and maintenance, stable moment and relatively longer abrasion life. The small riveting type powder alloy brake disc mainly comprises a framework, powder alloy fan-shaped sheets and rivets, wherein the powder alloy fan-shaped sheets are riveted on two sides of the framework, and braking torque is generated together with other brake discs. With the improvement of the requirements of the braking capability of the flywheel, the small riveting type powder alloy brake disc cannot be designed with more friction pairs in a limited space due to the larger thickness, so that the requirement of higher braking moment is difficult to meet; in the riveting process of the powder alloy brake disc, the rivet has the upsetting phenomenon of different degrees, so that the contact degree of the powder alloy fan-shaped piece and the framework is different, the consistency of the powder alloy fan-shaped piece after riveting is poor, the powder alloy fan-shaped piece and the framework are tightly connected, the powder alloy fan-shaped piece and the framework are loosely connected, in the braking process, the rivet stress of the powder alloy brake disc is different, in extreme cases, the rivet stress can be broken, the braking efficiency is reduced, and meanwhile, the surplus substances are generated, so that the safety of an airplane is influenced. Disclosure of Invention The application mainly aims to provide a brake disc of an aviation brake wheel, which aims to solve the problem that the rivet of the existing brake disc is stressed to be broken. The application provides a brake disc of an aviation brake wheel, which comprises an annular flat plate, wherein a plurality of fan-shaped through holes are formed in the circumferential direction, bosses are respectively formed on two radially opposite side walls of each through hole, two powder alloy fan-shaped sheets are arranged in each through hole, each powder alloy fan-shaped sheet comprises a fan-shaped first fixing plate, one surface of each first fixing plate is covered with a powder alloy layer, the other surface of each first fixing plate is connected with a second fixing plate, the size of each second fixing plate is smaller than that of each first fixing plate, steps are formed on two opposite sides of each second fixing plate, the two second fixing plates are connected through a connecting piece, grooves matched with the bosses are formed between the two first fixing plates, and the bosses are located in the grooves. Optionally, the thickness of the flat plate is greater than twice the total thickness of the first and second fixed plates and less than twice the thickness of the powder alloy scallops. Optionally, the height of the step is greater than 0.5 times the thickness of the boss and the difference is 0.02-0.05mm. Optionally, the connecting piece includes rivet pole and sleeve, and the rivet pole runs through two powder alloy fan-shaped pieces, and the sleeve cup joints in the rivet pole outside. Optionally, the riveting rod comprises a frustum, the small diameter end of the frustum is sequentially connected with a connecting rod and a ring table, a blind hole is formed in the ring table, the outer diameter of the ring table is smaller than that of the connecting rod, the total length of the connecting rod and the ring table is equal to that of the sleeve, the sleeve comprises a conical first sleeve, the small diameter end of the first sleeve is connected with a second sleeve, the first sleeve and the second sleeve are correspondingly sleeved on the outer sides of the ring table and the connecting rod, and the ring table is attached to the inner side of the first sleeve through riveting.