A high-efficiency braking device with a heat transfer enhancement structure

Abstract

The present invention provides a high-efficiency braking device with a heat transfer enhancement structure, which includes a friction plate assembly and a special-shaped brake disc; the friction plate assembly is in surface contact with the special-shaped brake disc, and the special-shaped brake disc rotates together with the rotating shaft of the rotating equipment. When braking is required, the friction plate assembly presses the special-shaped brake disc to slow down or stop the rotation of the special-shaped brake disc, thereby realizing the deceleration and braking function of the equipment; the present invention provides a heat transfer enhancement structure on the special-shaped brake disc, which avoids the problem of deformation of the special-shaped brake disc due to uneven heating or even cracking of the brake disc surface. Compared with a solid brake disc, the shell structure of the present invention will save a part of the manufacturing material and reduce the cost of the brake disc; such a structure, applied to the existing high-speed rotating equipment braking system, will better play the braking advantage of the brake disc, significantly enhance the braking efficiency and stability, and greatly extend its service life; the device described in the present invention has a scientific structure and good processability and has broad promotion and application value.

Description

Technical Field

[0001] The present invention provides a high-performance braking device with a heat transfer enhancement structure. Specifically, it is a braking device with a certain number of grooves and gas guide holes on the brake disc body, belonging to the field of rotating shaft braking technology; it is suitable for braking the rotating shafts of various airborne equipment, engineering machinery, trains, automobiles and other mechanical equipment. Background Art

[0002] Braking devices are mechanical parts that have the function of slowing down, stopping or keeping moving parts (or moving machinery) stopped. They are commonly known as brakes or brakes. Braking devices are widely used in airborne equipment, engineering machinery, trains, automobiles and other equipment. With the continuous advancement of science and technology, actual production applications have put forward higher requirements for braking devices. Braking devices are required to operate well under extreme working conditions such as high temperature, high speed and frequent braking. This puts higher requirements on the performance of braking devices.

[0003] At present, many experts and scholars at home and abroad are studying the braking device mainly from a positive and intuitive perspective: such as light weight, large braking force, good braking stability, low friction and wear, long service life, and reliable operation, and have achieved very good results; at the same time, a large number of theoretical basis and design methods have been accumulated for the design of the braking device; but there are few studies on the heat dissipation of the brake disc and friction plate of the braking device; the friction heat generated between the brake disc and the friction plate of the traditional braking device due to operation cannot be well dissipated, causing the end face to deform due to uneven heating. In severe cases, the brake disc and friction plate will crack, which greatly reduces the braking performance of the braking device; it may even cause the braking device to fail prematurely; excessively high end face temperature has become a bottleneck restricting the development of the braking device towards long life and high reliability, so how to reduce the end face temperature of the braking device has become an urgent problem to be solved. Summary of the Invention

[0004] (1) Purpose

[0005] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a high-efficiency braking device with a heat transfer enhancement structure. It is a new type of braking device with strong end face thermal conductivity, good temperature uniformity, strong anti-disturbance absorption performance and good braking performance; this braking device can effectively solve the end face deformation caused by excessively high end face temperature and uneven heating during operation of the existing braking device, thereby improving the braking performance of the braking device.

[0006] (2) Technical solution

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: a high-performance braking device with a heat transfer enhancement structure, such as Figure 1As shown, it includes a friction plate assembly and a special-shaped brake disc; the relationship between them is as follows: the friction plate assembly is in surface contact with the special-shaped brake disc, and the special-shaped brake disc rotates together with the rotating shaft of the rotating equipment. When braking is required, the friction plate assembly presses the special-shaped brake disc to slow down or stop the rotation of the special-shaped brake disc, thereby achieving the deceleration and braking functions of the equipment;

[0008] The friction plate assembly, such as Figure 3 As shown, it is composed of a friction plate bracket 1, a bearing steel ball 2, and a friction plate 3. The relationship between them is as follows: the friction plate 3 is combined with the bearing steel ball 2 and the spherical pit 11 inside the friction plate bracket 1 to form a friction plate assembly through the spherical groove 32 on the back of the friction plate 3.

[0009] The structure and shape of the friction plate bracket 1 are as follows Figure 3 and Figure 4 As shown, the friction plate bracket 1 is a circular ring structure with an inner ring radius of R1. There are four spherical pits 11 inside and four limit blocks 12 around it. There is a certain gap between these four limit blocks 12 and the friction plate 3, and the distance L2 is 2mm to 3mm.

[0010] The structural shape of the bearing steel ball 2 is as follows Figure 3 and Figure 4 As shown, it is a spherical steel ball, and the diameter of the bearing steel ball 2 is

[0011] The structure and shape of the friction plate 3 are as follows Figure 3 and Figure 4 As shown; the overall structure is a circular ring structure, the inner ring radius of the friction plate 3 is R2, which is equal to the inner ring radius R1 of the friction plate bracket 1, that is, R1 = R2; the front of the friction plate 3 is processed with an isosceles trapezoidal boss 31, the angle between the two waist sides of the isosceles trapezoidal boss 31 is θ1, the number of isosceles trapezoidal bosses 31 is 3 to 6, and they are evenly distributed from the inner ring to the outer ring; the specific number depends on the size of the entire braking device; the back of the friction plate 3 is processed with four spherical grooves 32, which are used to install the load-bearing steel balls 2 during assembly; the axial distance between the friction plate 3 and the friction plate bracket 1 in the assembled friction plate assembly is L1, L1 = 3mm to 5mm;

[0012] The special-shaped brake disc 4, such as Figure 5 As shown, it is composed of radial air flow holes 41, axial air flow holes 42, isosceles trapezoidal grooves 43, bolt holes 44 for mounting the brake disc, and circumferential air flow holes 45. They are all machined at different positions on the disc body of the special-shaped brake disc 4 and are an integral structure with the special-shaped brake disc 4.

[0013] The radial air flow holes 41, such as Figure 6As shown, there are circular air flow holes opened along the radial direction of the special-shaped brake disc 4, and the diameter of the radial air flow hole 41 is The radial air flow holes 41 are evenly arranged in a number of 10 to 16 along the circumferential direction, and the specific number depends on the structure and size of the brake device;

[0014] The axial air flow hole 42, such as Figure 6 As shown, a circular through hole is opened along the axial direction of the special-shaped brake disc 4, that is, on the disc surface; the diameter of the axial air flow hole 42 is The axial air flow holes 42 are distributed in 3 to 6 numbers along the radial direction of the special-shaped brake disc 4 and 10 to 16 numbers along the circumferential direction. The specific number depends on the structure and size of the brake device.

[0015] The axial air flow hole 42 and the radial air flow hole 41 are interconnected. Figure 6 As shown, the axes of the two through holes are perpendicular to each other, which is conducive to the circulation of air flow;

[0016] The isosceles trapezoidal groove 43, such as Figure 6 As shown, the isosceles trapezoidal grooves 43 are machined on the disc surface of the special-shaped brake disc 4 and are distributed radially in 3 to 6 patterns. The included angle between the two waist sides of the isosceles trapezoidal grooves 43 is θ2, and the included angle with the isosceles trapezoidal boss 31 of the friction plate 3 is θ1, where θ1-θ2=2°-3°. During operation, the isosceles trapezoidal grooves 43 contact the isosceles trapezoidal boss 31, greatly increasing the friction surface and improving the braking performance. This contact method also increases the heat dissipation area, which helps to reduce the temperature of the brake device.

[0017] The bolt holes 44 for mounting the brake disc are as follows: Figure 6 As shown, the through hole machined in the middle of the special-shaped brake disc 4 is a bolt through hole for mounting the special-shaped brake disc 4 on the rotating shaft of the desired brake device; the present invention has four bolt holes 44 for mounting the brake disc, the number of which depends on the structure and size of the brake device;

[0018] The annular air flow hole 45, such as Figure 6 As shown, a circular air flow hole is opened inside the disc body along the circumferential direction of the special-shaped brake disc 4, and the diameter of the through hole is It is the same as the diameter of the radial air flow hole 41 are equal in size, that is This helps the steam flow to take away more heat from the disk.

[0019] (3) Advantages and effects

[0020] The beneficial effects of the present invention are as follows: (1) a heat transfer enhancement structure is provided on the special-shaped brake disc 4, thereby avoiding the problem that the special-shaped brake disc 4 is deformed or even cracked due to uneven heating. At the same time, the heat dissipation area of ​​the brake disc is greatly improved after the heat transfer enhancement structure is provided; (2) when the gas enters the brake disc structure and contacts the inner wall of the cavity for conduction heat dissipation, the air flow also generates a vortex flow in the brake disc body to achieve better convection heat dissipation, so that the brake disc body can obtain good heat exchange and cooling effects; (3) based on the principle of tribology, the braking device performs surface contact friction between the disc body of the special-shaped brake disc 4 and the friction plate 3 through the trapezoidal concave grooves and bosses, which greatly increases the friction during braking. The rubbing surface and the heat dissipation surface improve the braking efficiency, and the overall spatial structure can be made smaller, saving materials and device space; (4) According to the principle of material mechanics, the rigidity of the shell structure is significantly better than that of the solid structure, and the spoiler structure can serve as a reinforcing rib and also increase the heat dissipation area and increase the rigidity of the special-shaped brake disc 4 to reduce the stress deformation; (5) Compared with the solid brake disc, the shell structure will save a part of the manufacturing material and reduce the cost of the brake disc; such a structure, applied to the existing high-speed rotating equipment braking system, will better play the braking advantage of the brake disc, significantly enhance the braking efficiency and stability, and greatly extend its service life; the device described in the present invention has a scientific structure and good processability, and has broad promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of a high-performance braking device with a heat transfer enhancement structure according to the present invention.

[0022] Figure 2 This is a schematic diagram of the exploded structure of a high-performance braking device with a heat transfer enhancement structure according to the present invention.

[0023] Figure 3 Schematic diagram of the decomposed structure of the friction plate assembly.

[0024] Figure 4 Schematic diagram of the assembly structure of the friction plate assembly.

[0025] Figure 5 It is a cross-sectional view of the special-shaped brake disc AA.

[0026] Figure 6 This is an enlarged view of the local structure of the special-shaped brake disc.

[0027] Figure 7 The arrows in the figure are schematic diagrams of the flow direction of the heat dissipation airflow when the special-shaped brake disc is working.

[0028] The numbers in the figure are explained as follows:

[0029] 1 is the friction plate bracket, 2 is the bearing steel ball, 3 is the friction plate, 4 is the special-shaped brake disc, 12 is the limit block,

[0030] 31 is an isosceles stepped boss, 32 is a spherical groove, 41 is a radial air flow hole, 42 is an axial air flow hole,

[0031] 43 is an isosceles trapezoidal groove, 44 is a bolt hole, and 45 is an annular air flow hole;

[0032] L1 is the assembly gap between the friction plate 3 and the friction plate bracket 1, and L2 is the gap between the limit block 12 and the friction plate 3.

[0033] R1 is the inner ring radius of the friction plate bracket 1, R2 is the inner ring radius of the friction plate,

[0034] θ1 is the included angle between the two waist sides of the isosceles trapezoidal boss 31, θ2 is the included angle between the two waist sides of the isosceles trapezoidal groove,

[0035] is the diameter of the bearing steel ball 2, is the diameter of the radial air flow hole 41, is the diameter of the annular air flow hole,

[0036] is the axial air flow hole diameter, DETAILED DESCRIPTION

[0037] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments;

[0038] The structure of the embodiment of the present invention is as follows Figures 1 to 7 As shown;

[0039] The present invention provides a high-performance braking device with a heat transfer enhancement structure, such as Figure 1 As shown, it includes a friction plate assembly and a special-shaped brake disc; the relationship between them is as follows: the friction plate assembly is in surface contact with the special-shaped brake disc, and the special-shaped brake disc rotates together with the rotating shaft of the rotating equipment. When braking is required, the friction plate assembly presses the special-shaped brake disc to slow down or stop the rotation of the special-shaped brake disc, thereby achieving the deceleration and braking functions of the equipment;

[0040] The friction plate assembly, such as Figure 3 As shown, it is composed of a friction plate bracket 1, a bearing steel ball 2, and a friction plate 3; the relationship between them is as follows: the friction plate 3 is combined with the bearing steel ball 2 and the spherical pit 11 inside the friction plate bracket 1 to form a friction plate assembly; the axial distance between the friction plate 3 and the friction plate bracket 1 after assembly is L1, L1 = 3mm ~ 5mm; Figure 3 and Figure 4As shown, the friction plate bracket 1 is a circular ring structure with an inner ring radius of R1. There are four spherical pits 11 inside and four limit blocks 12 around it. There is a certain gap between the four limit blocks 12 and the friction plate 3, and the distance is L2, L2 = 2mm ~ 3mm. The shape of the bearing steel ball 2 is as follows Figure 3 and Figure 4 As shown, it is a spherical steel ball, and the diameter of the bearing steel ball 2 is The structure and shape of the friction plate 3 are as follows Figure 3 and Figure 4 As shown; the overall structure is a circular ring structure, the inner ring radius of the friction plate 3 is R2, the front of the friction plate 3 is processed with an isosceles trapezoidal boss 31, the angle between the two waist sides of the isosceles trapezoidal boss 31 is θ1, the number of isosceles trapezoidal bosses 31 is 3 to 6, and they are evenly distributed from the inner ring to the outer ring; the specific number depends on the size of the entire braking device; the back of the friction plate 3 is processed with four spherical grooves 32, which are used to install the load-bearing steel balls 2 during assembly;

[0041] The special-shaped brake disc 4, such as Figure 5 As shown, it is composed of radial air flow holes 41, axial air flow holes 42, isosceles trapezoidal grooves 43, bolt holes 44 for mounting the brake disc, and annular air flow holes 45. They are all processed at different positions on the disc body of the special-shaped brake disc 4 and are an integral structure with the special-shaped brake disc 4; the radial air flow holes 41, as shown Figure 6 As shown, there are circular air flow holes opened along the radial direction of the special-shaped brake disc 4, and the diameter of the radial air flow hole 41 is The air flow holes 41 are evenly arranged in 10 to 16 numbers along the circumferential direction, and the specific number depends on the structure and size of the brake device; the axial air flow holes 42, such as Figure 6 As shown, a circular through hole is opened along the axial direction of the special-shaped brake disc 4, that is, on the disc surface; the diameter of the axial air flow hole is The axial air flow holes 42 are distributed in 3 to 6 directions along the radial direction of the special-shaped brake disc 4, and are distributed in 10 to 16 directions along the circumferential direction. The specific number depends on the structure and size of the brake device. The axial air flow holes 42 and the radial air flow holes 41 are mutually connected. Figure 5 As shown, the two axes are in orthogonal communication, which helps the flow of air; the isosceles trapezoidal groove 43, as shown Figure 6 As shown, it is processed on the disc surface of the special-shaped brake disc 4 and is radially distributed in 3 to 6 pieces; the angle between the two sides of the isosceles trapezoidal groove 43 is θ2, and the angle between the two sides and the isosceles trapezoidal boss 31 of the friction plate 3 is θ1, θ1-θ2 = 2°~3°. When working, the isosceles trapezoidal groove 43 contacts the isosceles trapezoidal boss 31, which greatly increases the friction surface and improves the braking efficiency. At the same time, this contact method also increases the heat dissipation area, which helps to reduce the temperature of the brake device; the bolt hole 44 for mounting the brake disc, as shown Figure 6As shown, the through hole is processed in the middle of the special-shaped brake disc 4, which is the bolt hole for mounting the special-shaped brake disc 4 on the rotating shaft of the braking device to be braked; the present invention has four bolt holes 44 for mounting the brake disc, the number of which depends on the size of the structure of the braking device; the annular air flow hole 45, as shown Figure 6 As shown, there is a circular air flow hole opened inside the disc body along the circumferential direction of the special-shaped brake disc 4, and the diameter of the through hole is It is the same as the diameter of the radial air flow hole 41 are equal in size, that is This helps the steam flow to take away more heat from the disk;

[0042] The brake device structure can be modeled according to a certain size and machining allowance, then cast into a blank, and then machined to obtain a brake device with a heat transfer enhancement structure and a special-shaped brake disc surface. When assembling the brake device, the air inlet and air outlet should be exposed so that the heat dissipation airflow can circulate and achieve the desired effect. For brake devices of different sizes, the number of air flow holes and trapezoidal structures and the axial thickness of the brake device can be determined according to actual conditions.

[0043] The contents described in the embodiments of this specification are merely an enumeration of the implementation forms of the inventive concept. The scope of protection of the present invention should not be regarded as limited to the specific forms described in the embodiments. The scope of protection of the present invention also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A high-performance braking device with a heat transfer enhancement structure, characterized in that: It includes a friction plate assembly and a special-shaped brake disc; the friction plate assembly contacts one side of the special-shaped brake disc, and the special-shaped brake disc rotates together with the rotating shaft of the rotating equipment. When braking is required, the friction plate assembly presses the special-shaped brake disc to slow down and stop the special-shaped brake disc, thereby achieving the deceleration and braking functions of the equipment; The friction plate assembly is composed of a friction plate bracket (1), a bearing steel ball (2) and a friction plate (3); the friction plate (3) is combined with the bearing steel ball (2) and the spherical recess (11) in the friction plate bracket (1) to form a friction plate assembly through the spherical groove (32) on the back of the friction plate (3); The friction plate bracket (1) is in the shape of a circular ring, with an inner ring radius of R1, four spherical pits (11) inside, and four limit blocks (12) around the four limit blocks (12); there is a gap between the four limit blocks (12) and the friction plate (3), the distance of which is L2, and the value of L2 is 2mm to 3mm; The structural shape of the bearing steel ball (2) is a spherical steel ball, and the diameter of the bearing steel ball (2) is The overall structural shape of the friction plate (3) is a circular ring structure. The inner ring radius of the friction plate (3) is R2, which is equal to the inner ring radius R1 of the friction plate bracket (1), that is, R1 = R2. An isosceles trapezoidal boss (31) is processed on the front of the friction plate (3). The angle between the two waist sides of the isosceles trapezoidal boss (31) is θ1. The number of the isosceles trapezoidal bosses (31) is 3 to 6 and is evenly distributed from the inner ring to the outer ring. The back of the friction plate (3) is machined with four spherical grooves (32), which are used to install the bearing steel balls (2) during assembly; the axial distance between the friction plate (3) and the friction plate bracket (1) in the assembled friction plate assembly is L1, and the value of L1 is 3mm to 5mm; The special-shaped brake disc (4) is composed of radial air flow holes (41), axial air flow holes (42), isosceles trapezoidal grooves (43), bolt holes (44) for mounting the brake disc, and circumferential air flow holes (45); all of them are processed at different positions on the disc body of the special-shaped brake disc (4) and are an integrated structure with the special-shaped brake disc (4); The radial air flow hole (41) is a circular air flow hole opened along the radial direction of the special-shaped brake disc (4). The diameter of the radial air flow hole (41) is The radial air flow holes (41) are evenly arranged in a circumferential direction in a number of 10 to 16; The axial air flow hole (42) is a circular through hole provided along the axial direction of the special-shaped brake disc (4), i.e., on the disc surface; the diameter of the axial air flow hole (42) is The axial air flow holes (42) are distributed in 3 to 6 numbers along the radial direction of the special-shaped brake disc (4), and 10 to 16 numbers along the circumferential direction; The axial air flow hole (42) and the radial air flow hole (41) are mutually connected, and the axes of the two holes are mutually orthogonal, which is conducive to the circulation of air flow; The isosceles trapezoidal groove (43) is machined on the disc surface of the special-shaped brake disc (4) and is distributed in 3 to 6 numbers along the radial direction; the angle between the two waist sides of the isosceles trapezoidal groove (43) is θ2, and the angle between the two waist sides and the isosceles trapezoidal boss (31) of the friction plate (3) is θ1, and the value of θ1-θ2 is 2° to 3°. During operation, the isosceles trapezoidal groove (43) contacts the isosceles trapezoidal boss (31); The bolt hole (44) for mounting the brake disc is a through hole processed in the middle of the special-shaped brake disc (4), and the special-shaped brake disc (4) is mounted on the bolt through hole of the rotating shaft of the required brake device; here, four bolt holes (44) for mounting the brake disc are selected. The annular air flow hole (45) is a circular air flow hole opened in the inner part of the disc body along the circumferential direction of the special-shaped brake disc (4), and the diameter of the through hole is The diameter of the radial air flow hole (41) are equal in size, that is

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