Bench experiment device for testing internal heat transfer characteristic of brake disc

Abstract

The utility model discloses a bench experiment device for testing the internal heat transfer characteristic of a brake disc, which belongs to the technical field of brake disc experiments and comprises a test bench, the top of the test bench is fixedly connected with a support frame, the middle of the support frame is fixedly connected with two bearing seats, and the middle bearings of the two bearing seats are connected with an experiment shaft. The test bench comprises a support frame, a test shaft is arranged on the support frame, brake disc bodies are arranged at the two ends of the test shaft, a brake mechanism is arranged at the top of the support frame, and a temperature measuring mechanism is arranged at the top of the test bench, the brake mechanism and the temperature measuring mechanism are arranged, and real brake conditions including brake pressure, brake speed, brake time and the like are simulated. The heat transfer behavior of the brake disc body under the actual working condition can be reflected more accurately, meanwhile, a temperature measuring sensor in the temperature measuring mechanism can monitor the temperature change of the surface of the brake disc body in real time, the experiment precision and reliability are improved, and temperature data of different positions in the brake disc body can be obtained.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of brake disc experiment, especially to a bench test device for measuring the heat transfer characteristics of brake disc. BACKGROUND

[0002] In the field of vehicle engineering and brake system research, the performance of brake disc, as a key safety component of vehicles such as cars, trains and airplanes, directly affects the braking effect and driving safety of vehicles. During braking, a large amount of heat energy is generated between the brake disc and the friction plate. If this heat energy cannot be dissipated in time and effectively, the temperature of the brake disc will rise, which will affect the material performance, braking efficiency and service life of the brake disc. Therefore, in-depth study of the heat transfer characteristics of the brake disc is of great significance for optimizing the design of the brake disc and improving the performance of the brake system.

[0003] The existing inertia bench test machine cannot meet the requirements of testing the performance and quality of the brake due to small simulated inertia, low automation level, inaccurate data measurement, and inability to truly simulate driving environment. Therefore, there is an urgent need for a disc brake simulation braking test bench that can truly simulate driving conditions and environment in the laboratory.

[0004] The existing patent (publication number: CN217638015U) discloses a vehicle disc brake test bench device, which comprises a three-phase alternating current gear reduction motor, a shaft coupling, a main shaft, a connecting disc, and a first support and a second support. The two ends of the shaft coupling are connected to the driving end of the three-phase alternating current gear reduction motor and the main shaft, respectively. The main shaft and the connecting disc are detachably connected together. The three-phase alternating current gear reduction motor, the shaft coupling and the main shaft are connected to the first support. The first support and the second support are connected by at least one connecting element. The second support is used to place the brake assembly.

[0005] To solve the above problems, the existing patent provides a solution, but it cannot achieve quick installation and separation between the brake caliper and the brake disc body, which reduces the disassembly efficiency of the brake disc body and affects the test efficiency of the brake disc body.

[0006] Therefore, a bench test device for measuring the heat transfer characteristics of brake disc is proposed. UTILITY MODEL CONTENTS

[0007] The utility model aims to provide a bench test device for measuring the heat transfer characteristics of brake disc, which can solve the problem of the existing vehicle disc brake test bench device that cannot achieve quick installation and separation between the brake caliper and the brake disc body, which reduces the disassembly efficiency of the brake disc body and affects the test efficiency of the brake disc body.

[0008] In order to achieve the above object, the utility model provides the following technical scheme: A bench experiment device for measuring the heat transfer characteristics of the inside of a brake disc, comprising a test bed, a support frame is fixedly connected to the top of the test bed, two bearing seats are fixedly connected to the middle of the support frame, an experimental shaft is connected to the middle of the two bearing seats, brake disc bodies are arranged at the two ends of the experimental shaft, a brake mechanism is arranged on the top of the support frame, a temperature measuring mechanism is arranged on the top of the test bed, a connecting mechanism is arranged between the experimental shaft and the brake disc bodies, and a driving mechanism is arranged on the top of the test bed.

[0009] The brake mechanism comprises a first electric push rod fixedly connected to the top of the support frame, an output end of the first electric push rod is fixedly connected with a lifting frame, brake calipers are arranged at the two ends of the lifting frame, the brake calipers are in contact with the brake disc bodies, a brake cylinder is arranged on the top of the support frame, and a transmission hose is arranged between the brake cylinder and the brake calipers.

[0010] Preferably, the temperature measuring mechanism comprises a support seat fixedly connected to the top of the test bed, the top of the support seat is provided with an opening, a plurality of temperature measuring sensors are arranged on the inner wall of the support seat at equal intervals, and the temperature measuring sensors are located on one side of the brake disc bodies.

[0011] Preferably, the connecting mechanism comprises a connecting disc fixedly connected to the two ends of the experimental shaft, a plurality of through holes are formed in the side wall of the connecting disc, a plurality of mounting holes are formed in the side wall of the brake disc body, the positions of the through holes and the mounting holes coincide, and mounting bolts are arranged in the middle of the through holes and the mounting holes.

[0012] Preferably, the driving mechanism comprises a driving motor bolted to the top of the test bed, an output end of the driving motor is fixedly connected with a driving wheel, a driven wheel is fixedly connected to the middle of the experimental shaft, and a transmission belt is arranged between the driving wheel and the driven wheel.

[0013] Preferably, four guide rods are fixedly connected to the top of the support frame, and the guide rods are movably connected with the lifting frame.

[0014] Preferably, a limiting disc is arranged on the top of the guide rod, limiting screws are arranged on the side wall of the limiting disc, and the side wall of the limiting screw is in contact with the guide rod.

[0015] Preferably, a strip-shaped groove is formed in the side wall of the guide rod, one end of the limiting screw is located in the interior of the strip-shaped groove, and the side wall of the limiting screw is in contact with the strip-shaped groove.

[0016] Preferably, a gasket is arranged in the middle of the mounting bolt, and the gasket is located on one side of the brake disc body.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1. The application sets up a brake mechanism and a temperature measuring mechanism, which can more accurately reflect the heat transfer behavior of the brake disc body under actual working conditions by simulating real braking conditions, including brake pressure, brake speed and brake time, etc., at the same time, the temperature measuring sensor in the temperature measuring mechanism can monitor the temperature change of the surface of the brake disc body in real time, improve the accuracy and reliability of the experiment, can obtain the temperature data of different positions inside the brake disc body, and then analyze the heat transfer characteristics of the brake disc body, which provides strong support for optimizing the design of the brake disc body, helps to improve the braking efficiency, prolong the service life and reduce the energy consumption, specifically, the first electric push rod drives the lifting frame to descend, so that the brake caliper contacts the brake disc body, at the same time, the brake cylinder provides brake pressure to the brake caliper through the transmission hose, simulates the real braking process, and the temperature measuring sensor in the temperature measuring mechanism monitors the temperature change of the surface of the brake disc body in real time during the braking process, and transmits the data to the data acquisition system, since the temperature measuring sensors are arranged at equal intervals on the inner wall of the supporting seat, the temperature data of different positions of the brake disc body can be obtained, and then the heat transfer characteristics inside the brake disc are analyzed.

[0019] 2. The application is provided with a connecting mechanism and a driving mechanism, which realizes the quick installation and connection between the brake disc body and the experimental shaft through the connecting mechanism, realizes the stable braking experiment of the brake disc body, realizes the power transmission of the experimental shaft through the driving mechanism, makes the power shaft rotate at different speeds, and then simulates the heat transfer characteristics of the brake disc body at different speeds, specifically, the experimental shaft is connected with the brake disc body through the connecting disc, the side wall of the connecting disc is provided with a plurality of through holes, the side wall of the brake disc body is provided with a plurality of mounting holes, the through holes are connected with the mounting holes, and the connecting disc and the brake disc body are fixedly connected through mounting bolts, so as to ensure the stability and firmness of the connection during the experiment, the driving motor drives the driving wheel to rotate, so as to drive the experimental shaft to rotate, and make the brake disc body rotate in the test process. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiment of the present application or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0021] Figure 1 It is the overall structure view of the present application;

[0022] Figure 2 It is the right view structure view of the present application;

[0023] Figure 3 It is the structure schematic view of the driving mechanism in the present application.

[0024] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is a schematic diagram of the connecting mechanism in this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Test bench; 2. Support frame; 3. Bearing seat; 4. Test shaft; 5. Brake disc body; 6. Braking mechanism; 7. Temperature measuring mechanism; 8. Connecting mechanism; 9. Drive mechanism; 61. First electric push rod; 62. Lifting frame; 63. Brake caliper; 64. Brake cylinder; 65. Transmission hose; 71. Support base; 72. Temperature sensor; 81. Connecting plate; 82. Through hole; 83. Mounting hole; 84. Mounting bolt; 91. Drive motor; 92. Driving wheel; 93. Driven wheel; 94. Transmission belt; 10. Guide rod; 11. Limiting plate; 12. Limiting screw; 13. Strip groove; 14. Gasket. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1 to 5 This utility model provides a technical solution:

[0030] A bench test apparatus for measuring the internal heat transfer characteristics of a brake disc includes a test bench 1, a support frame 2 fixedly connected to the top of the test bench 1, two bearing seats 3 fixedly connected to the middle of the support frame 2, an experimental shaft 4 connected to the middle bearing of the two bearing seats 3, brake disc bodies 5 provided at both ends of the experimental shaft 4, a braking mechanism 6 provided at the top of the support frame 2, a temperature measuring mechanism 7 provided at the top of the test bench 1, a connecting mechanism 8 provided between the experimental shaft 4 and the brake disc, and a driving mechanism 9 provided at the top of the test bench 1.

[0031] The braking mechanism 6 includes a first electric push rod 61 fixedly connected to the top of the support frame 2. The output end of the first electric push rod 61 is fixedly connected to a lifting frame 62. Both ends of the lifting frame 62 are provided with brake calipers 63. The brake calipers 63 are in contact with the brake disc body 5. The top of the support frame 2 is provided with a brake cylinder 64. A transmission hose 65 is provided between the brake cylinder 64 and the brake caliper 63.

[0032] Specifically, such as Figure 3 As shown, the temperature measuring mechanism 7 includes a support base 71 fixedly connected to the top of the test bench 1. The top of the support base 71 is open. Multiple temperature sensors 72 are evenly spaced on the inner wall of the support base 71. The temperature sensors 72 are located on one side of the brake disc body 5.

[0033] Specifically, such as Figure 4 As shown, four guide rods 10 are fixedly connected to the top of the support frame 2, and the guide rods 10 are movably connected to the lifting frame 62.

[0034] Specifically, such as Figure 4 As shown, a limiting disk 11 is provided at the top of the guide rod 10, and a limiting screw 12 is provided on the side wall of the limiting disk 11. The side wall of the limiting screw 12 is in contact with the guide rod 10.

[0035] Specifically, such as Figure 4 As shown, a strip groove 13 is provided on the side wall of the guide rod 10, and one end of the limiting screw 12 is located inside the strip groove 13, with the side wall of the limiting screw 12 in contact with the strip groove 13.

[0036] First, the brake disc 5 is securely mounted on both ends of the experimental shaft 4 via the connecting mechanism 8. Next, the temperature sensors 72 in the temperature measuring mechanism 7 are adjusted to ensure accurate measurement of the temperature change of the brake disc 5 during braking. At this point, the braking mechanism 6 is in its initial position, and the brake calipers 63 on the lifting frame 62 maintain a certain distance from the brake disc 5. The drive mechanism 9 is activated, and the drive motor 91 begins operation, driving the experimental shaft 4 and the brake discs 5 at both ends to rotate via the transmission device. Once the predetermined rotational speed is reached, the braking mechanism 6 begins operation. The first electric push rod 61 pushes the lifting frame 62 downward, causing the brake calipers 63 to gradually approach and contact the brake disc 5. Simultaneously, the brake cylinder 64 provides pressure to the brake calipers 63 through the transmission hose 65, simulating a real braking process. During braking, the temperature sensors 72 in the temperature measuring mechanism 7 monitor the temperature in real time. The temperature change on the surface of the brake disc 5 is measured and the data is transmitted to the data acquisition system. Since the temperature sensors 72 are equally spaced on the inner wall of the support 71, temperature data at different positions of the brake disc 5 can be obtained, providing a basis for subsequent heat transfer characteristic analysis. In order to ensure the stability of the lifting frame 62 during the up and down movement, four guide rods 10 are provided on the support frame 2. The lifting frame 62 is movably connected to the guide rods 10 to ensure that it will not deviate from the predetermined trajectory during the movement. In addition, the top of the guide rods 10 is also provided with a limit plate 11 and a limit screw 12. By adjusting the position of the limit screw 12 in the strip groove 13, the maximum descent height of the lifting frame 62 can be limited, thereby avoiding the brake caliper 63 from applying excessive pressure to the brake disc 5. The setting of the strip groove 13 increases the friction between the limit screw 12 and the guide rod 10.

[0037] Specifically, such as Figure 5 As shown, the connecting mechanism 8 includes a connecting plate 81 fixedly connected to both ends of the experimental shaft 4. Multiple through holes 82 are provided on the side wall of the connecting plate 81, and multiple mounting holes 83 are provided on the side wall of the brake disc body 5. The positions of the through holes 82 and the mounting holes 83 coincide, and mounting bolts 84 are provided in the middle of the through holes 82 and the mounting holes 83.

[0038] Specifically, such as Figure 3 As shown, the drive mechanism 9 includes a drive motor 91 bolted to the top of the test bench 1. The output end of the drive motor 91 is fixedly connected to a drive wheel 92, and the middle part of the test shaft 4 is fixedly connected to a driven wheel 93. A transmission belt 94 is provided between the drive wheel 92 and the driven wheel 93.

[0039] Specifically, such as Figure 5 As shown, a washer 14 is provided in the middle of the mounting bolt 84, and the washer 14 is located on one side of the brake disc body 5.

[0040] In use, the connecting mechanism 8 mainly consists of connecting discs 81, through holes 82, mounting holes 83, and mounting bolts 84. Connecting discs 81 are fixed at both ends of the experimental shaft 4. Multiple through holes 82 are pre-set on the side walls of these connecting discs 81. Mounting holes 83 corresponding to the positions of the through holes 82 on the side walls of the brake disc body 5 are also provided. When the brake disc body 5 needs to be connected to the experimental shaft 4, simply align the mounting holes 83 of the brake disc body 5 with the through holes 82 of the connecting discs 81. Then, pass the mounting bolts 84 through the through holes 82 and mounting holes 83, and tighten them with nuts to achieve a stable connection between the brake disc body 5 and the experimental shaft 4. In addition, a washer is provided in the middle of the mounting bolts 84. The gasket 14 is located on one side of the brake disc 5 and is used to increase the stability and sealing of the connection to prevent loosening or leakage during the experiment. The drive mechanism 9 consists of a drive motor 91, a drive wheel 92, a driven wheel 93, and a transmission belt 94. The drive motor 91 is bolted to the top of the test bench 1 and its output end is fixedly connected to the drive wheel 92. The driven wheel 93 is fixed in the middle of the test shaft 4. When the drive motor 91 is started, the drive wheel 92 rotates accordingly and transmits power to the driven wheel 93 through the transmission belt 94. The driven wheel 93 rotates synchronously with the test shaft 4, thereby driving the brake discs 5 at both ends of the test shaft 4 to rotate at a certain speed to simulate the rotation state during the actual braking process.

[0041] By adopting the above technical solution, the problem that the existing vehicle disc brake test bench device cannot achieve quick installation and separation between the brake caliper 63 and the brake disc 5 is solved, which leads to a reduction in the efficiency of disassembling and assembling the brake disc 5, and thus affects the testing efficiency of the brake disc 5.

[0042] Working Principle: In use, the two ends of the test shaft are first connected to the brake disc body 5 via connecting discs 81. The side wall of the connecting disc 81 has multiple through holes 82, and the side wall of the brake disc body 5 has multiple mounting holes 83. The through holes 82 and mounting holes 83 are aligned, and the connecting disc 81 and brake disc body 5 are fixed by mounting bolts 84 to ensure stability and connection during the experiment. The drive motor 91 drives the drive wheel 92 to rotate, thereby rotating the test shaft 4 and causing the brake disc body 5 to rotate during the experiment. The first electric push rod 61 pushes the lifting frame 62 to descend, causing the brake caliper 63 to gradually approach and contact the brake disc body 5. At the same time, the brake cylinder 64 provides pressure to the brake caliper 63 through the transmission hose 65 to simulate the real braking process. During the braking process, the temperature sensor 72 in the temperature measuring mechanism 7 monitors the temperature change on the surface of the brake disc body 5 in real time and transmits the data to the data acquisition system. Since the temperature sensors 72 are equally spaced on the inner wall of the support base 71, temperature data at different positions of the brake disc body 5 can be obtained, providing a basis for subsequent heat transfer characteristic analysis.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A bench test apparatus for measuring the internal heat transfer characteristics of a brake disc, comprising a test bench (1), characterized in that: The top of the test bench (1) is fixedly connected to a support frame (2), and the middle of the support frame (2) is fixedly connected to two bearing seats (3). The middle bearing of the two bearing seats (3) is connected to an experimental shaft (4). Both ends of the experimental shaft (4) are provided with brake disc bodies (5). The top of the support frame (2) is provided with a braking mechanism (6). The top of the test bench (1) is provided with a temperature measuring mechanism (7). A connecting mechanism (8) is provided between the experimental shaft (4) and the brake disc. The top of the test bench (1) is provided with a driving mechanism (9). The braking mechanism (6) includes a first electric push rod (61) fixedly connected to the top of the support frame (2). The output end of the first electric push rod (61) is fixedly connected to a lifting frame (62). Both ends of the lifting frame (62) are provided with brake calipers (63). The brake calipers (63) are in contact with the brake disc body (5). The top of the support frame (2) is provided with a brake cylinder (64). A transmission hose (65) is provided between the brake cylinder (64) and the brake caliper (63).

2. The test bench apparatus for measuring the internal heat transfer characteristics of a brake disc according to claim 1, characterized in that: The temperature measuring mechanism (7) includes a support base (71) fixedly connected to the top of the test bench (1). The top of the support base (71) is open. Multiple temperature sensors (72) are evenly spaced on the inner wall of the support base (71). The temperature sensors (72) are located on one side of the brake disc body (5).

3. The test bench apparatus for measuring the internal heat transfer characteristics of a brake disc according to claim 1, characterized in that: The connecting mechanism (8) includes a connecting plate (81) fixedly connected to both ends of the experimental shaft (4). The side wall of the connecting plate (81) is provided with a plurality of through holes (82), and the side wall of the brake disc body (5) is provided with a plurality of mounting holes (83). The positions of the through holes (82) and the mounting holes (83) coincide, and mounting bolts (84) are provided in the middle of the through holes (82) and the mounting holes (83).

4. The test bench apparatus for measuring the internal heat transfer characteristics of a brake disc according to claim 1, characterized in that: The drive mechanism (9) includes a drive motor (91) bolted to the top of the test bench (1), a drive wheel (92) is fixedly connected to the output end of the drive motor (91), a driven wheel (93) is fixedly connected to the middle of the test shaft (4), and a transmission belt (94) is provided between the drive wheel (92) and the driven wheel (93).

5. The test bench apparatus for measuring the internal heat transfer characteristics of a brake disc according to claim 1, characterized in that: The top of the support frame (2) is fixedly connected with four guide rods (10), and the guide rods (10) are movably connected to the lifting frame (62).

6. The test bench apparatus for measuring the internal heat transfer characteristics of a brake disc according to claim 5, characterized in that: A limiting plate (11) is provided on the top of the guide rod (10), and a limiting screw (12) is provided on the side wall of the limiting plate (11). The side wall of the limiting screw (12) is in contact with the guide rod (10).

7. The test bench apparatus for measuring the internal heat transfer characteristics of a brake disc according to claim 6, characterized in that: A strip groove (13) is provided on the side wall of the guide rod (10), and one end of the limiting screw (12) is located inside the strip groove (13), with the side wall of the limiting screw (12) in contact with the strip groove (13).

8. The test bench apparatus for measuring the internal heat transfer characteristics of a brake disc according to claim 3, characterized in that: A washer (14) is provided in the middle of the mounting bolt (84), and the washer (14) is located on one side of the brake disc body (5).

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