Wheel for rail transit with brake disc

Abstract

The application discloses a rail transit wheel with a brake disc, which comprises a wheel hub, spokes and a wheel rim which are concentrically distributed outward from the center of the wheel hub, wherein two sides of the spoke are symmetrically connected with a friction ring through a heat dissipation rib, the friction ring extends radially with the center as the center and is uniformly distributed in the circumferential direction, and a heat dissipation air duct is formed between the spoke and the friction ring, wherein the spoke is composed of a first straight plate part, an S-shaped part and a second straight plate part, the spoke is connected with the wheel hub and the wheel rim through the first straight plate part and the second straight plate part respectively, and the S-shaped part is opposite to the friction ring so as to change the direction of the heat dissipation air duct. The rail transit wheel with the brake disc provided by the application can effectively improve the ventilation and heat dissipation efficiency of the wheel through the S-shaped part arranged on the spoke.

Description

Technical Field

[0001] This utility model relates to the field of rail transit wheel equipment technology, and in particular to rail transit wheels with brake discs. Background Technology

[0002] In the prior art, the spokes of rail transit wheels with brake discs must be straight-plate spokes, and the wheel and brake disc are assembled together by bolts, nuts, locating pins, O-rings, etc.

[0003] Among them, the bosses on the brake disc used for bolt fixing will increase wind resistance, reduce ventilation efficiency, and thus affect heat dissipation. Secondly, while this modular structure facilitates the disassembly and replacement of brake discs, it increases the machining precision of the vehicle sides and brake discs, and poses potential risks such as loose nuts and broken bolts. Utility Model Content

[0004] To address at least one of the aforementioned technical problems, embodiments of this application provide a rail transit wheel with a brake disc, which can effectively improve the wheel's ventilation and heat dissipation efficiency.

[0005] This application provides a rail transit wheel with a brake disc, including a hub and spokes and a rim concentrically distributed outward from the center of the hub. Friction rings are symmetrically connected to both sides of the spokes via heat dissipation ribs. The friction rings extend radially from the center and are evenly distributed circumferentially, forming a heat dissipation duct between the spokes and the friction rings. Each spoke consists of a first straight plate portion, an S-shaped portion, and a second straight plate portion. The spokes connect the hub and the rim via the first and second straight plate portions, respectively. The S-shaped portion faces the friction rings to change the direction of the heat dissipation duct.

[0006] In one possible implementation, the S-shaped portion has at least one pressure balancing hole to connect the heat dissipation ducts on both sides.

[0007] In one possible implementation, the pressure balancing hole is one and located at the center of the heat dissipation duct.

[0008] In one possible implementation, there are 2-4 pressure balancing holes, and the 2-4 pressure balancing holes are evenly distributed along the radial direction.

[0009] In one possible implementation, the spokes, the heat dissipation fins, and the friction ring are integrally formed.

[0010] In one possible implementation, the hub has a hollow structure, with an oil groove on the inner ring and an oil filling hole on the outer ring that communicates with the oil groove.

[0011] Beneficial effects: Compared with the prior art, the rail transit wheel with brake disc provided in this application improves the conventional straight plate structure of the wheel spokes to a straight plate combined with an S-shaped structure. By using the S-shaped part and the friction rings on both sides to change the direction of the heat dissipation air duct, the contact area with the air in the heat dissipation air duct can be increased, thereby improving the ventilation and heat dissipation efficiency, so that the heat generated by the braking of the rail transit vehicle can be quickly dissipated through the wheel spokes. The spokes, cooling fins, and friction ring are integrally formed, which increases the rigidity of the spokes, cooling fins, and friction ring. This makes the spokes thinner than those of conventional wheels, thereby directly increasing the cross-sectional area of ​​the cooling duct, increasing ventilation volume, and improving heat dissipation. It also solves the problems of high machining precision requirements for vehicle sides and brake discs, as well as the easy loosening of nuts and the easy breakage of bolts in existing technologies.

[0012] These and other objects, features and advantages of this utility model will be fully realized through the following detailed description. Attached Figure Description

[0013] Figure 1 A schematic diagram of the structure of the rail transit wheel with brake disc of this application is shown.

[0014] Figure 2 This application shows Figure 1 Schematic diagram of the cross-sectional structure along the AA direction. Detailed Implementation

[0015] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0016] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0017] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0018] refer to Figure 1 and Figure 2 This application provides a rail transit wheel with a brake disc, including a hub 10 and spokes 20 and a rim 30 concentrically distributed outward from the center of the hub 10. Friction rings 40 are symmetrically connected to both sides of the spokes 20 via heat dissipation ribs 41. The friction rings 40 extend radially from the center and are evenly distributed circumferentially, forming a heat dissipation duct 201 between the spokes 20 and the friction rings 40. The spokes 20 consist of a first straight plate portion 21, an S-shaped portion 22, and a second straight plate portion 23. The spokes 20 connect the hub 10 and the rim 30 via the first straight plate portion 21 and the second straight plate portion 23, respectively. The S-shaped portion 22 faces the friction rings 40 to change the direction of the heat dissipation duct 201.

[0019] Conventional straight or flat heat dissipation channels tend to form fully developed laminar flow during heat dissipation. In this flow state, the fluid flows parallel like layers of thin sheets with almost no mixing between layers, resulting in slow heat conduction through the fluid itself and low convective heat transfer efficiency. This application creatively improves the wheel spokes from a conventional straight plate type to a straight plate + S-shaped structure, creating slight bends within the heat dissipation duct 201 and altering its direction. Due to centrifugal force, the faster-flowing fluid at the center of the main flow channel is thrown outwards, while the slower-flowing fluid near the wall is forced inwards. This motion creates one or more pairs of rotating vortices on the cross-section perpendicular to the main flow direction, achieving a "stirring" heat dissipation effect and "interfering" with the flow. This disrupts the thermal boundary layer, significantly improving heat dissipation efficiency and allowing the heat generated by the rail vehicle during braking to be quickly dissipated through the wheel spokes 20.

[0020] To minimize the pressure difference between the heat dissipation ducts on both sides of the spokes, in one embodiment, the S-shaped portion 22 is provided with at least one pressure balance hole 202 to connect the heat dissipation ducts 201 on both sides. This allows a "shortcut" of static pressure balance to be established between the heat dissipation ducts 201 on both sides. Some of the high-pressure air from the high-pressure side duct will flow directly to the low-pressure side duct through the pressure balance hole, making the airflow distribution of the two heat dissipation ducts 201 more balanced and optimizing the airflow distribution. This solves the "air grabbing" problem caused by uneven flow resistance in parallel ducts, thus ensuring the heat dissipation effect.

[0021] In one embodiment, there is one pressure balancing hole 202, which is located at the center of the heat dissipation duct 201.

[0022] In another embodiment, there are 2-4 pressure balancing holes 201, and the 2-4 pressure balancing holes 201 are evenly distributed along the radial direction.

[0023] In one embodiment, the spokes 20, the cooling ribs 41, and the friction ring 40 are integrally formed, such as by casting. This integral box-like structure can increase the rigidity of the spokes 20, the cooling ribs 41, and the friction ring 40, making the spokes 20 thinner than the spokes of conventional wheels. This can directly increase the ventilation cross-sectional area of ​​the cooling duct 201, increase the ventilation volume, and improve the heat dissipation effect. At the same time, it can also solve the problems of high machining precision requirements for the vehicle side and brake disc, as well as the easy loosening of nuts and the easy breakage of bolts in the prior art.

[0024] In one embodiment, the wheel hub 10 has a hollow structure, and the wheel hub 10 has an oil groove 101 on the inner ring and an oil injection hole 102 on the outer ring that communicates with the oil groove 101. Hydraulic oil can be injected into the oil groove 101 through the oil injection hole 102, making it convenient to remove the wheel during disassembly, assembly, and maintenance.

[0025] It should be noted that the terms "first" and "second" used in this application are for descriptive purposes only and do not indicate any order. They should not be construed as indicating or implying relative importance, and can be interpreted as names.

[0026] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A wheel for rail transport with a brake disc, characterized in that, The device includes a hub and spokes and a rim arranged concentrically outward from the center of the hub. Friction rings are symmetrically connected to both sides of the spokes via heat dissipation ribs. The friction rings extend radially from the center and are evenly distributed circumferentially, forming a heat dissipation channel between the spokes and the friction rings. The spokes consist of a first straight plate portion, an S-shaped portion, and a second straight plate portion. The spokes connect the hub and the rim via the first straight plate portion and the second straight plate portion, respectively. The S-shaped portion faces the friction rings to change the direction of the heat dissipation channel.

2. The railcar wheel with brake disc as defined in claim 1, characterized in that The S-shaped portion has at least one air pressure balance hole to connect the heat dissipation air ducts on both sides.

3. The rail transit wheel with brake disc as described in claim 2, characterized in that, There is one air pressure balance hole, which is located at the center of the heat dissipation duct.

4. The rail transit wheel with brake disc as described in claim 2, characterized in that, The pressure balancing holes are 2-4 in number, and the 2-4 pressure balancing holes are evenly distributed along the radial direction.

5. The rail transit wheel with brake disc as described in claim 1, characterized in that, The spokes, the heat dissipation ribs, and the friction ring are integrally formed.

6. The rail transit wheel with brake disc as described in claim 1, characterized in that, The hub has a hollow structure, with an oil groove on the inner ring and an oil filling hole on the outer ring that connects to the oil groove.

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