A new single-web aircraft brake master cylinder wheel

Abstract

The present application relates to the field of aviation brake wheel, in particular to a novel single-web aircraft brake master wheel, comprising: a brake assembly and a wheel assembly arranged on the landing gear shaft, the wheel assembly and the brake assembly are installed on the landing gear shaft to form the single-web aircraft brake master wheel, wherein the outer ring of the heat sink assembly and the inner wall of the outer cylinder of the hub assembly form a first heat dissipation channel, the inner ring of the brake shell assembly and the outer wall of the inner cylinder of the hub assembly form a second heat dissipation channel, the second heat dissipation channel is communicated with the through hole arranged on the end surface of the brake shell assembly, the airflow output by the cooling fan assembly in the air collecting cavity passes through the heat dissipation holes arranged on the hub web, the first heat dissipation channel and the second heat dissipation channel to take the heat of the heat sink assembly to the outside of the brake assembly. The present application can dissipate the radiation heat of the heat sink assembly to the atmosphere outside the aviation wheel, greatly improving the cooling efficiency of the cooling fan on the heat sink assembly.

Description

Technical Field

[0001] This invention relates to the field of aircraft brake wheels, and specifically to a novel single-webbed aircraft brake main wheel. Background Technology

[0002] In the field of aviation braking, aircraft energy is increasing while the weight requirements for wheels and their associated tires are decreasing, resulting in a linear increase in the energy load per unit mass of the main brake wheel. To quickly reduce the temperature of the main brake wheel and shorten the aircraft's return-to-flight time, more and more aircraft are being equipped with fan cooling systems. In addition, to improve the maintainability of aircraft in the field, tire temperature and pressure monitoring devices have been designed to monitor the temperature and pressure of the wheels and tires.

[0003] The key to rapid cooling of the brake main wheel lies in the matching design of the brake cooling fan and motor. Current technologies often improve the lift-to-drag ratio by changing the number and airfoil of the fan blades, or by increasing the motor power to increase the fan speed, thus improving the cooling efficiency of the cooling fan. In recent years, the optimization of the airfoil of the cooling fan blades has become increasingly sophisticated, and it can no longer bring about further efficiency improvements. At the same time, increasing the motor power leads to an increase in motor weight and heat generation. Due to the limitations of the landing gear shaft, there are extremely strict requirements on the size, weight, and heat generation of the motor installed inside the landing gear shaft. Therefore, from the perspective of the cooling system itself, there is little potential left to improve the cooling efficiency of the cooling fan.

[0004] In existing tire temperature and pressure monitoring devices, the tire temperature and pressure sensors are connected via threaded holes on the wheel hub that connect to the tire's inner cavity. They transmit tire temperature and pressure signals to a temperature and pressure detector via radio frequency signals, thus detecting tire temperature and pressure. Throughout the aircraft's takeoff and landing process, the tire temperature and pressure sensors, along with the main brake wheel, must withstand impact loads, brake vibrations, and brake heat. Brake heat, in particular, can cause malfunctions in the electronic components of the communication control module contained within the tire temperature and pressure sensor. Therefore, improving the heat dissipation of the tire temperature and pressure monitoring device is a pressing issue that needs to be addressed.

[0005] Therefore, a novel single-webbed aircraft brake main wheel is needed to solve the above problems. Summary of the Invention

[0006] This invention provides a novel single-webbed aircraft brake main wheel to solve the problem in the prior art where the electronic components of the communication control module contained in the tire temperature and pressure sensor malfunction due to the influence of brake heat.

[0007] The present invention discloses a novel single-web aircraft brake main wheel with the following technical solution, comprising: a brake assembly and a wheel assembly mounted on a landing gear shaft. The wheel assembly includes: a hub assembly, which includes an inner cylinder and an outer cylinder arranged concentrically. The inner cylinder is fitted onto the landing gear shaft, and an annular cavity is formed between the inner cylinder and the outer cylinder. One end face of the inner cylinder and the outer cylinder is connected by a hub web. An air shroud assembly is provided on the side of the hub web facing away from the annular cavity, and an air shroud assembly and the hub web form an air duct. A valve core seat and a temperature monitoring device are provided on the outer surface of the hub web within the air duct. A cooling fan assembly is provided on the landing gear shaft end face within the air duct.

[0008] The brake assembly includes: a brake housing assembly, one of which extends into an annular cavity, and a cylinder block assembly and a heat storage assembly disposed on the outer ring of the brake housing assembly;

[0009] The outer ring of the heat storage component forms a first heat dissipation channel between the outer ring of the heat storage component and the inner wall of the outer cylinder of the wheel hub component, and the inner ring of the brake housing component forms a second heat dissipation channel between the inner ring of the brake housing component and the outer wall of the inner cylinder of the wheel hub component. The second heat dissipation channel is connected to the through hole provided on the end face of the brake housing component. The airflow output by the cooling fan component in the air collection cavity carries the heat of the heat storage component to the outside of the brake component through the heat dissipation holes provided on the wheel hub web, the first heat dissipation channel and the second heat dissipation channel.

[0010] Preferably, the outer cylinder of the wheel hub assembly is flared, and a heat insulation screen assembly is provided on the inner wall of the outer cylinder.

[0011] Preferably, the heat insulation screen assembly includes a heat insulation screen, a circular rubber pad is provided on the surface of the heat insulation screen facing the inner wall of the outer cylinder, and the end of the heat insulation screen is connected to the inner wall of the outer cylinder through a connecting lug.

[0012] Preferably, the heat storage assembly includes multiple moving plate assemblies, and each moving plate assembly has multiple arc-shaped heat dissipation grooves on its outer circumference.

[0013] Preferably, the through hole provided on the end face of the brake housing assembly is an arc-shaped strip through hole, which is connected to the air collection cavity through the second heat dissipation channel and the heat dissipation hole.

[0014] Preferably, the cylinder block assembly is provided with an annular heat insulation plate, and the inner and outer surfaces of the annular heat insulation plate are provided with a zirconia thermal barrier coating; the annular heat insulation plate has multiple circular holes, which are fitted onto the bushing of the cylinder block assembly, and the annular heat insulation plate and the bushing are fixed by bushing nuts.

[0015] Preferably, the heat dissipation holes provided on the wheel hub web are transition holes with one end larger than the other, and the smaller end of the heat dissipation hole faces the air collection chamber.

[0016] Preferably, the brake assembly further includes a heat shield assembly mounted on the brake housing assembly between the cylinder block assembly and the heat storage assembly.

[0017] Preferably, the heat insulation plate assembly includes: a heat insulation plate, an inner heat insulation pad provided on the side of the heat insulation plate facing the output end of the cylinder block assembly, and an outer heat insulation pad provided on the side of the heat insulation plate facing the heat storage assembly.

[0018] Preferably, the outer and inner heat insulation pads are made of titanium alloy, and a zirconium oxide thermal barrier coating is provided on both sides of the heat insulation plate.

[0019] The beneficial effects of this invention are:

[0020] 1. By using the brake assembly and wheel assembly on the landing gear axle, a first heat dissipation channel is formed between the outer ring of the heat storage component of the brake assembly and the inner wall of the outer cylinder of the wheel hub assembly. A second heat dissipation channel is formed between the inner ring of the brake housing assembly of the brake assembly and the outer wall of the inner cylinder of the wheel hub assembly. An air collection cavity is formed between the air collector assembly and the wheel hub web. The first and second heat dissipation channels are connected through heat dissipation holes on the wheel hub web and the air collection cavity, respectively. The cooling fan assembly of the air collection cavity blows cooling air along the heat dissipation holes and the first heat dissipation channel to the heat storage component, thereby dissipating the radiant heat of the heat storage component to the atmosphere outside the aircraft wheel, which greatly improves the cooling efficiency of the cooling fan for the heat storage component.

[0021] 2. The application of titanium alloy heat insulation disc components and heat insulation plates, as well as zirconia thermal barrier coating in this invention, achieves double-layer heat insulation. The design of the heat insulation pad of the heat insulation screen component further isolates the heat of the heat storage component, ensuring that the temperature of the wheel hub, cylinder seat and landing gear shaft can meet the standard requirements under various working conditions.

[0022] 3. Secondly, the present invention sets the opening of the heat dissipation hole to be large at one end and small at the other end, with the small end of the heat dissipation hole facing the air collection cavity. That is, the heat dissipation hole can prevent the cooling air of the cooling fan from rebounding and generating a vortex phenomenon, ensuring that the cooling air is blown towards the heat storage component; the teardrop-shaped heat dissipation hole increases the area of ​​the heat dissipation hole and further improves the effective flow rate of the cooling air.

[0023] 4. The structural design of the valve core seat and valve core on the wheel hub assembly allows for the installation and removal of the temperature and pressure monitoring device at any time without the need to jack up the aircraft or release tire pressure, greatly improving the operability of field maintenance. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a novel single-webbed aircraft brake main wheel according to the present invention;

[0026] Figure 2 for Figure 1 A cross-sectional view of the structure of the brake assembly;

[0027] Figure 3 for Figure 1 Half-sectional view of the structure of the central turbine assembly;

[0028] Figure 4 for Figure 3 Schematic diagram of the center hub assembly;

[0029] Figure 5 This is a schematic diagram of the heat dissipation channels for cooling air in a cross-sectional view of the wheel assembly and brake assembly;

[0030] Figure 6 for Figure 3 Schematic diagram of the structure of the heat insulation shield assembly;

[0031] Figure 7 for Figure 2 Schematic diagram of the structure of the central heat storage component;

[0032] Figure 8 for Figure 2 Schematic diagram of the middle brake housing assembly;

[0033] Figure 9 for Figure 2 Schematic diagram of the cylinder block assembly;

[0034] Figure 10 This is a schematic diagram of the insulation board structure;

[0035] Figure 11 This is a schematic diagram of the heat insulation plate assembly;

[0036] Figure 12 A schematic diagram showing the mounting holes for the temperature and pressure monitoring device;

[0037] Figure 13 This is a schematic diagram of the valve core seat.

[0038] In the diagram: 1. Landing gear axle; 2. Braking system; 3. Wheel assembly; 4. Cooling fan assembly; 5. Temperature and pressure monitoring device; 2-1. Cylinder seat assembly; 2-2. Brake housing assembly; 2-3. Heat shield assembly; 2-4. Heat storage assembly; 3-1. Wheel hub; 3-2. Wheel rim; 3-3. Snap ring; 3-4. Air duct assembly; 3-5. Heat shield assembly; 4-1. Heat dissipation hole; 5-1. First heat dissipation channel; 5-2. Second heat dissipation channel; 6-1. Circular rubber pad; 6-2. Connecting lug; 7-1. Arc-shaped heat dissipation groove; 8-1. Through hole; 10-1. Circular hole; 11-1. Heat shield; 11-2. Inner heat insulation pad; 11-3. Outer heat insulation pad. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] An embodiment of a novel single-webbed aircraft brake main wheel of the present invention, such as... Figure 1 As shown, it includes: a brake assembly 2 and a wheel assembly 3 mounted on the landing gear shaft 1. The wheel assembly 3 and the brake assembly 2 are installed together on the landing gear shaft 1 to form a configuration as shown. Figure 1 The novel single-webbed aircraft brake main wheel is shown.

[0041] Among them, such as Figure 3As shown, the wheel assembly 3 in this embodiment includes a hub assembly 3-1, a rim 3-2, a retaining ring assembly 3-3, a wind collector assembly 3-4, and a heat shield assembly 3-5. The inner ring of the rim 3-2 is fitted onto the outer wall of the hub assembly 3-1, and together with the fixed rim of the hub assembly 3-1, it limits the tire's position. The retaining ring assembly 3-3 is installed in a retaining ring groove on the hub assembly 3-1, limiting the rim 3-2's position. The hub assembly 3-1 includes a concentric inner cylinder and an outer cylinder. The inner cylinder is fitted onto the landing gear shaft 1, forming an annular cavity between the inner and outer cylinders. One end face of the inner and outer cylinders is connected via a hub web. The side of the hub web facing away from the annular cavity is... An air collector shroud assembly 3-4 is provided, forming an air collection cavity between the air collector shroud assembly 3-4 and the wheel hub web. In this embodiment, the wheel hub assembly 3-1 is a single-web structure, and the material of the wheel hub assembly 3-1 is 2014 aluminum alloy. The air collector shroud assembly 3-4 is installed on the wheel hub web, and the air collector shroud of the air collector shroud assembly 3-4 is a frustum-shaped thin cylindrical structure with a maximum outer diameter of φ391mm and a thickness of 13mm. A valve core seat and a temperature monitoring device 5 are provided on the outer surface of the wheel hub web inside the air collection cavity. In this embodiment, two threaded holes are provided on the inclined platforms on both sides of the wheel hub web. The threaded hole on the inner side of the wheel hub web is used to install the valve core seat, and the threaded hole on the outer side is used to install the temperature and pressure monitoring device 5. Figure 13 As shown, the valve core seat has a 5V1 threaded interface in its inner hole for installing standard aviation valve cores. The inner hole also has a standard internal hexagonal interface for installing and removing the valve core seat. After the temperature and pressure monitoring device 5 is installed on the hub assembly 3-1, the small round platform on the end face of the device 5 presses against the valve core rod head, keeping the valve core in a normally open state. After the temperature and pressure monitoring device 5 is removed, the valve core rod springs back, keeping the valve core in a normally closed state. The structural design of the valve core seat and valve core on the hub assembly 3-1 allows for the installation and removal of the temperature and pressure monitoring device at any time without the need for aircraft jacking or tire pressure release operations, greatly improving field maintenance operability. A cooling fan assembly 4 is installed on the end face of the landing gear shaft 1 within the air intake chamber. A heat insulation shield assembly 3-5 is provided on the inner wall of the outer cylinder of the hub assembly 3-1. In this embodiment, the bottom diameter of the outer cylinder is φ459mm, and the opening diameter is φ483mm, forming an overall trumpet shape. The heat insulation shield assembly 3-5 is installed parallel to the inner wall of the outer cylinder of the hub, forming a trumpet-shaped structure with a large opening. Figure 6 As shown, the heat insulation panel assembly 3-5 includes a heat insulation panel. A circular rubber pad 6-1 with a radius R of 6 mm is provided on the surface of the heat insulation panel facing the inner wall of the outer cylinder. The end of the heat insulation panel is connected to the inner wall of the outer cylinder through a connecting lug 6-2. The circular rubber pad 6-1 contacts the inner wall of the outer cylinder of the hub, thereby reducing the heat conduction of the heat insulation panel assembly 3-5 to the inner wall of the outer cylinder of the hub.

[0042] Among them, such as Figure 2As shown, the cylinder block assembly 2-1, brake housing 2-2, heat shield assembly 2-3, and heat storage assembly 2-4, as... Figure 1 As shown, one of the brake housing assembly 2-2 extends into the annular cavity, and the cylinder seat assembly 2-3 and the heat storage assembly 2-4 are disposed on the outer ring of the brake housing assembly 2-2; wherein, as Figure 5 As shown, a first heat dissipation channel 5-1 is formed between the outer ring of the heat storage assembly 2-4 and the inner wall of the outer cylinder of the hub assembly 3-1. A second heat dissipation channel 5-2 is formed between the inner ring of the brake housing assembly 2-2 and the outer wall of the inner cylinder of the hub assembly 3-1. The second heat dissipation channel 5-2 is connected to the through hole 8-1 provided on the end face of the brake housing assembly 2-2. The airflow output by the cooling fan assembly 4 in the air collection cavity carries the heat of the heat storage assembly 2-4 to the outside of the brake assembly 2 through the heat dissipation hole 4-1, the first heat dissipation channel 5-1 and the second heat dissipation channel 5-2 provided on the hub web. That is, this device can dissipate most of the heat radiated by the heat storage assembly 2-4 to the atmosphere outside the aircraft wheel, which greatly improves the cooling efficiency of the cooling fan assembly 4 for the heat storage assembly 2-4.

[0043] Specifically, such as Figure 1 and Figure 7 As shown, the heat storage assembly 2-4 includes multiple moving plate assemblies. Each moving plate assembly has multiple arc-shaped heat dissipation slots 7-1 on its outer circle. In this embodiment, the heat storage assembly 2-4 includes four moving plate assemblies. Each moving plate assembly has nine arc-shaped heat dissipation slots 7-1 with a radius R of 150mm on its outer circle.

[0044] Specifically, such as Figure 8 As shown, the brake housing assembly 2-2 is horn-shaped, and the small end of the brake housing assembly 2-2 is provided with 6 through holes 8-1. The through holes 8-1 are arc-shaped strip through holes. The arc-shaped strip through holes are connected to the air collection cavity through the second heat dissipation channel 5-2 and the heat dissipation hole 4-1. In this embodiment, the radius R of the arc part of the arc-shaped strip through hole is 6mm, the width of the strip part is 24mm, and the hole depth is 64mm. The 6 arc-shaped strip through holes are used to dissipate the hot air of the second heat dissipation channel 5-2 to the outside of the brake device.

[0045] Specifically, such as Figure 9 As shown, a circular heat insulation plate is provided on the cylinder block assembly 2-3, such as... Figure 10As shown, a zirconia thermal barrier coating is provided on both the inner and outer surfaces of the annular heat insulation plate; multiple circular holes 10-1 are opened on the annular heat insulation plate, and the circular holes 10-1 are fitted onto the bushing of the cylinder seat assembly 2-3. The annular heat insulation plate and the bushing are fixed by the bushing nut. In this embodiment, the maximum outer diameter of the cylinder seat assembly 2-3 is φ420mm, the inner diameter of the cylinder seat assembly 2-3 is φ230mm, and the annular heat insulation plate with a thickness of 2mm is fitted onto the outer ring of the bushing on the cylinder seat assembly. Five arc-shaped grooves with a radius R of 250mm are provided on the outer arc surface of the annular heat insulation plate. The material of the annular heat insulation plate is TC4. The flat surfaces on both sides of the annular heat insulation plate are coated with a zirconia thermal barrier coating; five circular holes 10-1 with a diameter of φ53mm are opened on the annular heat insulation plate, and the circular holes 10-1 are respectively fitted onto the bushings of the cylinder seat assembly 2-3, and the annular heat insulation plate and the bushings are fixed together by the bushing nuts.

[0046] Specifically, such as Figure 1 As shown, the heat dissipation hole 4-1 on the wheel hub web is a transition hole with one end larger than the other. The smaller end of the heat dissipation hole 4-1 faces the air collection cavity. In this embodiment, the heat dissipation hole 4-1 is a teardrop-shaped through hole composed of four arc segments. The size of the heat dissipation hole 4-1 facing the inner side of the web is larger than that facing the outer side, forming a cooling air flow channel. This can prevent the cooling air of the cooling fan assembly 4 from rebounding and generating a vortex phenomenon, and ensure that the cooling air output by the cooling fan assembly 4 is blown towards the heat storage assembly 2-4.

[0047] Specifically, such as Figure 1 As shown, brake assembly 2 also includes: a heat shield assembly, which is mounted on brake housing assembly 2-2 between cylinder block assembly 2-3 and heat storage assembly 2-4. The inner ring of the heat shield assembly is fitted onto a protruding key on the outer ring of brake housing assembly 2-2 via a keyway. Figure 11 As shown, the heat insulation plate assembly includes: a heat insulation plate 11-1, an inner heat insulation pad 11-2 disposed on the side of the heat insulation plate 11-1 facing the output end of the cylinder block assembly 2-3, and an outer heat insulation pad 11-3 disposed on the side of the heat insulation plate 11-1 facing the heat storage assembly 2-4; the outer heat insulation pad 11-3 and the inner heat insulation pad 11-2 are made of titanium alloy, and a zirconium oxide thermal barrier coating is disposed on both sides of the heat insulation plate 11-1. In this embodiment, the heat insulation plate 11-1, the inner heat insulation pad 11-2 and the outer heat insulation pad 11-3 are all made of TC4; the maximum outer diameter of the heat insulation plate 11-1 is φ393mm, the inner diameter of the heat insulation plate 11-1 is φ232mm, and the thickness of the heat insulation plate 11-1 is 6mm in the form of a circular structure.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel single-webbed aircraft brake main wheel, comprising a brake assembly and a wheel assembly mounted on the landing gear axle, characterized in that, The landing gear assembly includes: a hub assembly, which includes a concentric inner cylinder and an outer cylinder. The inner cylinder is fitted and fixed on the landing gear shaft, and an annular cavity is formed between the inner cylinder and the outer cylinder. One end face of the inner cylinder and the outer cylinder is connected by a hub web. An air shroud assembly is provided on the side of the hub web facing away from the annular cavity, and an air shroud assembly is formed between the air shroud assembly and the hub web. A valve core seat and a temperature monitoring device are provided on the outer surface of the hub web inside the air shroud. A cooling fan assembly is provided on the end face of the landing gear shaft inside the air shroud. The brake assembly includes: a brake housing assembly, one end of which extends into an annular cavity, and a cylinder seat assembly and a heat storage assembly are disposed on the outer ring of the brake housing assembly; Among them, a first heat dissipation channel is formed between the outer ring of the heat storage component and the inner wall of the outer cylinder of the wheel hub component, and a second heat dissipation channel is formed between the inner ring of the brake housing component and the outer wall of the inner cylinder of the wheel hub component. The second heat dissipation channel is connected to the through hole provided on the end face of the brake housing component. The airflow output by the cooling fan component in the air collection cavity carries the heat of the heat storage component to the outside of the brake component through the heat dissipation hole provided on the wheel hub web, the first heat dissipation channel and the second heat dissipation channel. The heat storage assembly includes multiple moving disc assemblies, each with multiple arc-shaped heat dissipation grooves on its outer circumference; the end face of the brake housing assembly has an arc-shaped strip-shaped through hole, which is connected to the air collection chamber through a second heat dissipation channel and a heat dissipation hole; the heat dissipation hole on the wheel hub web has a transition hole with one end larger than the other, and the smaller end of the heat dissipation hole faces the air collection chamber.

2. The novel single-webbed aircraft brake main wheel according to claim 1, characterized in that, The outer cylinder of the wheel hub assembly is flared, and a heat shield assembly is installed on the inner wall of the outer cylinder.

3. A novel single-webbed aircraft brake main wheel according to claim 2, characterized in that, The heat insulation shield assembly includes a heat insulation shield, on the surface of the heat insulation shield facing the inner wall of the outer cylinder, a circular rubber pad is provided, and the end of the heat insulation shield is connected to the inner wall of the outer cylinder through a connecting lug.

4. A novel single-webbed aircraft brake main wheel according to claim 1, characterized in that, The cylinder block assembly is equipped with an annular heat shield, and the inner and outer surfaces of the annular heat shield are coated with zirconia thermal barrier coating. The annular heat shield has multiple holes, which are fitted onto the bushing of the cylinder block assembly. The annular heat shield and the bushing are fixed by bushing nuts.

5. A novel single-webbed aircraft brake main wheel according to claim 1, characterized in that, The brake assembly also includes a heat shield assembly, which is mounted on the brake housing assembly between the cylinder block assembly and the heat storage assembly.

6. A novel single-webbed aircraft brake main wheel according to claim 5, characterized in that, The heat insulation plate assembly includes: a heat insulation plate, an inner heat insulation pad provided on the side of the heat insulation plate facing the output end of the cylinder block assembly, and an outer heat insulation pad provided on the side of the heat insulation plate facing the heat storage assembly.

7. A novel single-webbed aircraft brake main wheel according to claim 6, characterized in that, The outer and inner heat insulation pads are made of titanium alloy.

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