Pneumatic brake testing method and testing equipment thereof

Abstract

The invention relates to a pneumatic brake test method and test equipment thereof, and the method comprises the following steps: 1, opening a to-be-tested pneumatic brake, and connecting a lifting device with a load-bearing frame and a brake fin fixedly connected with the load-bearing frame; 2, the lifting device drives the load bearing frame to be away from the to-be-tested pneumatic brake, and the to-be-tested pneumatic brake is closed; 3, the lifting device is disconnected from the load-bearing frame, the load-bearing frame freely falls, and the brake fin collides with the to-be-tested pneumatic brake; fourthly, the lifting device runs, the load bearing frame is connected again, and the second step and the third step are repeated; 5, opening the to-be-tested pneumatic brake, disconnecting the lifting device from the load-bearing frame, stopping the movement of the load-bearing frame and the brake fin, and ending the test; by simulating the actual load working condition of the roller coaster which is as real as possible, the pneumatic brake system is repeatedly and fully tested, relevant parameters of the pneumatic brake are recorded, and the reliability and durability of the pneumatic brake are evaluated.

Description

Technical Field

[0001] The invention relates to the technical field of brake testing, and in particular to a pneumatic brake testing method and testing equipment thereof. Background Art

[0002] The pneumatic brake system of a roller coaster consists of two parts: the pneumatic brake, which is fixed on the roller coaster track; and the brake fin, which is fixed on the bottom of the moving vehicle. During the operation of the roller coaster, the vehicle drives the brake fin to move. When the brake fin is inserted into the pneumatic brake, the brake holds the brake fin under the action of air pressure to achieve friction deceleration.

[0003] During this braking process, the pneumatic brakes and brake fins will be subjected to great impact loads, and there is a risk of attenuation or even failure after long-term operation. In order to verify the reliability and durability of the roller coaster pneumatic brake system, the pneumatic brake system needs to be placed on a test bench for repeated and sufficient testing, and the test process must be as close as possible to the actual load conditions of the roller coaster.

[0004] Therefore, it is necessary to develop a pneumatic brake testing method and a testing device thereof to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a pneumatic brake testing method and a testing device thereof which are convenient for evaluating the reliability and durability performance of the brake.

[0006] To achieve the above object, the present invention provides the following technical solution: a pneumatic brake testing method, comprising the following steps: Step 1: The pneumatic brake to be tested is turned on, and the lifting device is connected to the load-bearing frame and the brake fins fixedly connected to the load-bearing frame; Step 2: The lifting device drives the load-bearing frame away from the pneumatic brake to be tested, and the pneumatic brake to be tested is closed and enters the test state; Step 3: The lifting device is disconnected from the load-bearing frame, the load-bearing frame falls freely, and the brake fin collides with the pneumatic brake to be tested; Step 4: The lifting device is running, the load-bearing frame is reconnected, the pneumatic brake to be tested is opened, and steps 2 and 3 are repeated; Step 5: The pneumatic brake to be tested is opened, the lifting device is disconnected from the load-bearing frame, the load-bearing frame and the brake fins stop moving, and the test is ended.

[0007] Furthermore, step two includes the lifting device driving the electromagnet to move, and the electromagnet adsorbs the load-bearing frame.

[0008] Furthermore, step 2 includes the control unit collecting the closing time of the pneumatic brake to be tested entering the test state.

[0009] Furthermore, step three includes demagnetizing the electromagnet, and the control unit collects the demagnetization time of the electromagnet and the contact time between the brake fin and the pneumatic brake to be tested, and calculates the speed of the load-bearing frame.

[0010] Further, step four includes the control unit recording the opening time of the pneumatic brake to be tested.

[0011] A pneumatic brake test device, comprising: frame; A lifting device, mounted on the top of the frame, comprising a lifting motor and a transmission belt connected to the lifting motor; A catch-and-release assembly, mounted on the transmission belt, comprises a lifting platform and an electromagnet fixedly connected to the lifting platform; The load-bearing device comprises a load-bearing frame and a brake fin mounted on the outside of the load-bearing frame, wherein the electromagnet is attracted to or disconnected from the load-bearing frame; The brake assembly is provided with a pneumatic brake to be tested, wherein the pneumatic brake to be tested forms a gap to be tested with a variable spacing, and the gap to be tested is opposite to the brake fin.

[0012] Furthermore, one side of the brake fin is fixedly connected to the load-bearing frame, and the other side extends vertically outward, and the bottom of the brake fin extends vertically toward the brake assembly.

[0013] Furthermore, a hydraulic buffer is provided at the bottom of the frame, and the top of the hydraulic buffer extends vertically upward and is located below the load-bearing device.

[0014] Furthermore, a load-bearing cavity is formed inside the load-bearing frame, and a counterweight can be placed in the load-bearing cavity.

[0015] Furthermore, the maximum weight of the load-bearing frame and the counterweight located in the bearing cavity is t, the maximum falling acceleration height is m, and the maximum kinetic energy is: .

[0016] Compared with the prior art, the beneficial effects of the present invention are: it is easy to evaluate the reliability and durability of the brakes, by simulating the actual load conditions of a roller coaster as close as possible to the real one, repeatedly and fully testing the pneumatic brake system, and recording the relevant parameter indicators of the pneumatic brakes, evaluating the reliability and durability of the pneumatic brakes, and improving the safety of the roller coaster. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the pneumatic brake test equipment; Figure 2 for Figure 1 A schematic diagram of the structure of the lifting device of the pneumatic brake test equipment shown; Figure 3 for Figure 1 The schematic diagram of the structure of the pneumatic brake test equipment including the catch and release assembly, load-bearing device, brake assembly and hydraulic buffer; Figure 4 for Figure 1 A schematic diagram of the partial structure of the pneumatic brake test equipment shown. DETAILED DESCRIPTION

[0019] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the pneumatic brake test method and test equipment proposed by the present invention, its specific implementation method, structure, features and effects are described in detail below in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0020] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0021] The specific scheme of the pneumatic brake testing method and testing equipment provided by the present invention is described in detail below with reference to the accompanying drawings.

[0022] Please see Figures 1 to 4 A pneumatic brake testing device includes a frame 1, a lifting device 2 installed on the top of the frame 1, a grab and release assembly 3 pulled by the lifting device 2, a load-bearing device 4 grabbed by the grab and release assembly 3, a brake assembly 5 located on one side of the load-bearing device 4 and a hydraulic buffer 6 located at the bottom of the frame 1.

[0023] Please see Figure 1The frame 1 includes a support rod 11, an upper fixing plate 12 installed on the top of the support rod 11, and a lower fixing plate 13 installed on the bottom of the support rod 11. The upper fixing plate 12 and the lower fixing plate 13 are in a horizontal state, and the two ends of the support rod 11 are fixedly connected to the upper fixing plate 12 and the lower fixing plate 13 respectively.

[0024] Please see Figure 2 The lifting device 2 includes a lifting motor 21, a first passive shaft 22 located at the top of the frame 1, and a second passive shaft 23 located at the bottom of the frame 1. The first passive shaft 22 and the second passive shaft 23 are on the same vertical line. The first passive shaft 22 and the second passive shaft 23 are both sleeved with a transmission gear 24, and a transmission belt 25 is sleeved on the transmission gear 24. The transmission belt 25 can be a belt, a chain, etc. The first passive shaft 22 and the second passive shaft 23 are linked by the transmission belt 25. The lifting motor 21 is connected with a driving gear 26, and the first passive shaft 22 is sleeved with a passive gear 27. The driving gear 26 and the passive gear 27 are driven by belts, chains, etc.

[0025] Please see Figure 1 and Figure 3 The catch and release assembly 3 includes a lifting platform 31 and an electromagnet 32 ​​installed on the lifting platform 31. The lifting platform 31 is in a horizontal state, and its two sides extend outward and are fixedly connected to the transmission belt 25. A guide rail 33 is provided on the outside of the lifting platform 31. The top of the guide rail 33 is fixedly connected to the upper fixed plate 12, and the bottom thereof extends vertically downward and is fixedly connected to the lower fixed plate 13. A guide member 34 is provided on the outside of the lifting platform 31. One end of the guide member 34 is fixedly connected to the lifting platform 31, and the other end extends to one side of the guide rail 33. A pair of pulleys 35 are installed on the guide member 34. The pair of pulleys 35 are respectively located on both sides of the guide rail 33 and clamp the guide rail 33 to slide along the guide rail 33.

[0026] The electromagnet 32 ​​is installed under the lifting platform 31 and is used to adsorb the load-bearing device 4. The number of the electromagnets 32 changes according to demand. In this embodiment, the electromagnets 32 are permanent magnets and are four in number. A single electromagnet 32 ​​can provide an adsorption force greater than 1 t. After the electromagnet 32 ​​is magnetized, it has permanent adsorption capability. Even if an unexpected power outage occurs, the electromagnet 32 ​​will not be demagnetized and release the load-bearing device 4.

[0027] Each electromagnet 32 ​​is equipped with a dedicated controller (not shown). When the controller is performing charging and demagnetization, if the electromagnet 32 ​​is accidentally short-circuited or open-circuited, a fault alarm will be issued without damaging the electromagnet 32 ​​or the controller. After the electromagnet 32 ​​is adsorbed, the controller will have a signal of successful magnetization. Whether it is actually adsorbed requires additional detection (through a travel switch test). In this embodiment, multiple electromagnet 32 ​​controllers are clustered and controlled by PLC.

[0028] Please see Figure 1 and Figure 3 The load-bearing device 4 includes a load-bearing frame 41 and a brake fin 42 fixedly connected to the load-bearing frame 41. The load-bearing frame 41 is a metal frame. The electromagnet 32 ​​can adsorb the load-bearing frame 41. Guide members 34 are provided on the outer sides of the upper and lower ends of the load-bearing frame 41. The guide members 34 clamp the guide rails 33. The load-bearing frame 41 moves along the guide rails 33. A load-bearing cavity 43 is formed inside the load-bearing frame 41. Counterweights such as sandbags can be placed in the load-bearing cavity 43 according to needs. A single sandbag weighs about 25 kg. The sandbags and the load frame are reliably and flexibly installed through straps.

[0029] Specifically, the weight of the load-bearing frame 41 and the counterweight located in the bearing cavity 43 is up to 2 tons at most, and the maximum falling acceleration height is 5 meters. According to v^2=2gh, the initial velocity at the time of impact is about 10m / s, and the maximum kinetic energy is:

[0030] The brake fin 42 is installed on the load-bearing frame 41. One side of the brake fin 42 is fixedly connected to the load-bearing frame 41, and the other side extends vertically outward. The bottom of the brake fin 42 extends vertically toward the brake assembly 5. The length and position of the brake fin 42 can be changed according to needs.

[0031] Please see Figure 3 and Figure 4 The brake assembly 5 includes a fixing frame 51 and a pneumatic brake 52 to be tested mounted on the fixing frame 51. The fixing frame 51 is mounted at the bottom of the frame 1 and is used to support the pneumatic brake 52 to be tested. The pneumatic brake 52 to be tested has a gap 53 to be tested, and the gap 53 to be tested corresponds to the brake fin 42. Specifically, the pneumatic brake 52 to be tested is controlled by a solenoid valve (not shown) and presents two states. When the pneumatic brake 52 to be tested is opened, the brake fin 42 can pass through the gap 53 to be tested normally. When the pneumatic brake 52 to be tested is closed, the brake fin 42 needs to invade the gap 53 to be tested and rub against the pneumatic brake 52 to be tested.

[0032] The hydraulic buffer 6 is installed on the lower fixing plate 13 , with its bottom fixedly connected to the lower fixing plate 13 and its top extending vertically upward. In this embodiment, the number of the hydraulic buffers 6 is four.

[0033] Furthermore, a pneumatic brake test device also includes a control unit 7, which is used to integrate the control of the lifting motor 21, the control of the electromagnet 32 ​​(2 or 4 controllers), and the control of the air circuit solenoid valve of the pneumatic brake 52 to be tested, and collect relevant information of each component through sensors (not shown).

[0034] A method for testing a pneumatic brake test device, the steps comprising: Step 1: The load-bearing frame 41 is supported by the hydraulic buffer 6, the pneumatic brake 52 to be tested is opened to avoid interference with the brake fin 42, and the lifting device 2 drives the electromagnet 32 ​​to move and contact the load-bearing frame 41; Step 2: The electromagnet 32 ​​is magnetized to attract the load-bearing frame 41. The controller of the electromagnet 32 ​​sends a signal of successful magnetization, the lifting motor 21 runs, the lifting platform 31 drives the load-bearing frame 41 to move upward, and stops after reaching a predetermined height. The brake fin 42 completely withdraws from the pneumatic brake 52 to be tested, and the pneumatic brake 52 to be tested is closed. The control unit 7 receives the closing time of the pneumatic brake 52 to be tested; Step 3: The electromagnet 32 ​​is demagnetized, the load-bearing frame 41 falls freely, and the brake fin 42 collides with the pneumatic brake 52 to be tested. The control unit 7 collects the demagnetization time of the electromagnet 32 ​​and the contact time of the brake fin 42 and the pneumatic brake 52 to be tested, and calculates the speed of the load-bearing frame 41; Step 4: The lifting motor 21 is running, the lifting platform 31 is lowered, the electromagnet 32 ​​moves, contacts and adsorbs the load-bearing frame 41, and then repeats step 2, and the control unit 7 records the opening time of the pneumatic brake 52 to be tested; Step 5: The lifting motor 21 descends, the lifting platform 31 and the load-bearing frame 41 slowly fall onto the hydraulic buffer 6, the electromagnet 32 ​​is demagnetized, and the test ends.

[0035] When the cam-type cutting and inserting integrated machine of the present invention is used, the first feeding device 6 conveys the material belt to a predetermined position, the second feeding device 7 conveys the plastic part to a predetermined position, the first clamping cam 21 rotates, and the clamping shaft 222 moves along the motion trajectory of the first clamping cam 21. At this time, the follower body 221 rotates around the fixed shaft 224, so that the pusher 223 moves in the opposite direction, pushing the stopper 232, and the sliding body 231 moves toward the material belt direction through the slider 234. The first clamping claw 233 drives the moving knife 236 to move synchronously, and the second clamping claw 233 drives the moving knife 236 to move synchronously. The second clamping jaw 34 at the end of the holding module 3 moves toward the material belt, the first clamping jaw 233 and the second clamping jaw 34 clamp a single material on the material belt, and then continue to move toward the second clamping module 3, the movable knife 236 and the fixed knife 5 cut the connection between the material belt and the material, the insertion cam 41 rotates, and the second front and rear sliding member 43 drives the first clamping jaw 233 and the second clamping jaw 34 located on the moving platform 431 to move toward the plastic part. After moving into place, the first front and rear sliding member 42 drives the push pin rod 423 to squeeze the material, so that the material enters the plastic part.

[0036] The present invention provides a pneumatic brake testing method and testing equipment, which are characterized by being easy to evaluate the reliability and durability performance of the brake. By simulating the actual load conditions of a roller coaster as close as possible to the real one, the pneumatic brake system is repeatedly and fully tested, and the relevant parameter indicators of the pneumatic brake are recorded to evaluate the reliability and durability performance of the pneumatic brake, thereby improving the safety of the roller coaster.

[0037] 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 principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic brake testing method, characterized in that: The following steps are involved: Step 1: The pneumatic brake (52) to be tested is turned on, and the lifting device (2) is connected to the load-bearing frame (41) and the brake fin (42) fixedly connected to the load-bearing frame (41); Step 2: The lifting device (2) drives the load-bearing frame (41) away from the pneumatic brake (52) to be tested, and the pneumatic brake (52) to be tested is closed and enters a test state; Step 3: the lifting device (2) is disconnected from the load-bearing frame (41), the load-bearing frame (41) falls freely, and the brake fin (42) collides with the pneumatic brake (52) to be tested; Step 4: The lifting device (2) is operated, the load-bearing frame (41) is reconnected, the pneumatic brake (52) to be tested is opened, and steps 2 and 3 are repeated; Step 5: The pneumatic brake (52) to be tested is opened, the lifting device (2) is disconnected from the load-bearing frame (41), the load-bearing frame (41) and the brake fin (42) stop moving, and the test ends.

2. The pneumatic brake testing method according to claim 1, characterized in that: Step 2 includes the lifting device (2) driving the electromagnet (32) to move, and the electromagnet (32) adsorbing the load-bearing frame (41).

3. The pneumatic brake testing method according to claim 1, characterized in that: Step 2 includes the control unit (7) collecting the closing time of the pneumatic brake (52) to be tested entering the test state.

4. The pneumatic brake testing method according to claim 1, characterized in that: Step three includes demagnetizing the electromagnet (32), the control unit (7) collecting the demagnetization time of the electromagnet (32) and the contact time between the brake fin (42) and the pneumatic brake (52) to be tested, and calculating the speed of the load-bearing frame (41).

5. The pneumatic brake testing method according to claim 1, characterized in that: Step 4 includes the control unit (7) recording the opening time of the pneumatic brake (52) to be tested.

6. A pneumatic brake test device, characterized in that: It includes: Frame (1); A lifting device (2) is installed on the top of the frame (1), comprising a lifting motor (21) and a transmission belt (25) connected to the lifting motor (21); A catch-and-release assembly (3) mounted on the transmission belt (25), comprising a lifting platform (31) and an electromagnet (32) fixedly connected to the lifting platform (31); The load-bearing device (4) comprises a load-bearing frame (41) and a brake fin (42) mounted on the outside of the load-bearing frame (41), wherein the electromagnet (32) absorbs or disconnects from the load-bearing frame (41); The brake assembly (5) is provided with a pneumatic brake to be tested (52), wherein the pneumatic brake to be tested (52) forms a gap to be tested (53) with a variable spacing, and the gap to be tested (53) is opposite to the brake fin (42).

7. The pneumatic brake test equipment according to claim 6, characterized in that: One side of the brake fin (42) is fixedly connected to the load-bearing frame (41), and the other side extends vertically outwards; the bottom of the brake fin (42) extends vertically in the direction of the brake assembly (5).

8. The pneumatic brake test equipment according to claim 6, characterized in that: A hydraulic buffer (6) is provided at the bottom of the frame (1), and the top of the hydraulic buffer (6) extends vertically upwards and is located below the load-bearing device (4).

9. The pneumatic brake test equipment according to claim 6, characterized in that: A bearing cavity (43) is formed inside the load-bearing frame (41), and a counterweight object can be placed in the bearing cavity (43).

10. The pneumatic brake test device according to claim 9, characterized in that: The pneumatic brake test equipment according to claim 9 is characterized in that the weight of the load-bearing frame (41) and the counterweight located in the bearing cavity (43) is up to 2 tons at most, the maximum falling acceleration height is 5 meters, and the maximum kinetic energy is: .

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