Rotating platform for mechanical dynamic behavior and performance test

Abstract

The utility model discloses a rotating platform for mechanical dynamic behavior and performance testing in the field of performance testing platforms. The rotating platform comprises a rotating disc, a driving device and a braking device, the rotating disc is driven by the driving device to rotate, and the braking device is used for controlling braking of the driving device. The driving device comprises a motor and a main shaft, one end of the main shaft is connected with the output end of the motor, the other end of the main shaft is connected with the rotating disc, and the braking device is installed on the main shaft; the system further comprises an overspeed device and a data acquisition system. The test platform is compact in structure, stability and safety of the test platform are improved under dual protection of the overspeed device and the brake device, the data acquisition system acquires operation data of each component during operation of the test platform, each component of the test platform is optimized, and operation stability of the platform under complex working conditions is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to test platform field especially relates to a kind of rotation platform of mechanical dynamic behavior and performance test. BACKGROUND

[0002] The rotation platform of mechanical dynamic behavior and performance test is used to help researchers to systematically analyze the response characteristics of rotary machinery under complex working conditions, so as to optimize the design and control strategy of rotary machinery and enhance the safety and reliability of production equipment. Rotary machinery is prone to problems such as insufficient structural strength, delayed response and imperfect safety protection in high-power and complex working conditions. The existing platform has safety risks during testing experiments, and the operation of components on the test platform cannot be monitored, the protection device is not perfect, which increases the risk of rotary machinery operation and limits the testing accuracy. SUMMARY

[0003] The utility model aims at providing a kind of rotation platform of mechanical dynamic behavior and performance test, and the overspeed device and brake device that are equipped ensure the safety of test platform, and the data acquisition system that is equipped collects test platform operation data, and optimizes test platform.

[0004] To solve the above technical problems, the following technical solutions are adopted:

[0005] The utility model provides a kind of rotation platform of mechanical dynamic behavior and performance test, including rotary disc, drive arrangement and brake device;The rotary disc is driven to rotate by the drive arrangement, and the brake device is used to control the brake of the drive arrangement;

[0006] The drive arrangement includes motor and main shaft, one end of the main shaft is connected with motor output end, and the other end is connected with the rotary disc, and the brake device is installed on the main shaft;

[0007] It further includes overspeed device, is installed in the outer edge of rotary disc, and is used to brake when the rotating speed of the rotary disc exceeds preset rotating speed;

[0008] It further includes data acquisition system, and is used to collect the state data of test platform.

[0009] Optionally, the drive arrangement further includes transmission shaft, and the main shaft is connected with the rotary disc by transmission shaft.

[0010] Optionally, the brake device is installed on the transmission shaft.

[0011] Optionally, the data acquisition system comprises a camera for recording dynamic behavior of the test platform in operation, a mass measuring device for measuring mass of the rotating disc, a diameter measuring device for being arranged in the test platform, a rotating speed measuring device for measuring rotating speed of the main shaft, and a gap measuring device for measuring gap between a trip device and a pressure regulating valve in the overspeed device.

[0012] Optionally, the camera is mounted on a holder to support the camera to the same height as the rotating disc, the gap measuring device comprises a CCD laser micrometer mounted on a first support, the mass measuring device comprises a single-point mass sensor mounted on a second support and located at the bottom of the rotating disc, the rotating speed measuring device comprises a rotating speed measuring sensor and a mounting gear disc mounted on the main shaft and located between the rotating disc and the brake device, and the diameter measuring device comprises an inner-outer diameter universal measuring instrument mounted on a mounting frame at the side of a desired measuring position.

[0013] Optionally, the motor output end is connected with the input end of a speed reducer through a shaft coupling, and the output end of the speed reducer is connected with one end of the main shaft.

[0014] Optionally, the support device for supporting the overspeed device is mounted on a transmission shaft connected between the main shaft and the rotating disc through a bearing, and the support device comprises a mounting disc and four telescopic arms arranged in a ring shape on the mounting disc, one end of each telescopic arm is mounted on the mounting disc, the other end of each telescopic arm is provided with a support disc, and the support disc contacts and supports the bottom of the overspeed device.

[0015] Optionally, the main shaft has a length of 960 mm, a diameter of 300 mm, and is made of 45 steel, and can bear a maximum torque of 241 Nm.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] The utility model discloses a compact structure improves the stability and safety of test platform under the double protection of overspeed device and brake device, improves the response speed and reliability of system, can protect equipment under the sudden condition fast, avoids the problem of resonance and torque mismatch, through data acquisition system, gathers the operation data of each part when test platform is running, through to data analysis, optimizes each part of test platform, realizes the optimal design of test platform, strengthens the operation stability of platform under complex working condition, provides reliable guarantee for the dynamic behavior test of rotary machine. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the partial structure schematic drawing of test platform provided by the utility model,

[0019] Figure 2 It is the overall structure schematic drawing of test platform provided by the utility model,

[0020] Figure 3 It is the drive arrangement and brake device structure schematic drawing of test platform provided by the utility model.

[0021] BRIEF DESCRIPTION OF DRAWINGS:

[0022] 1, motor;2, speed reducer;3, main shaft;4, brake device;5, support device;6, rotary disc;7, overspeed device;8, gear disc;9, holder;10, first support;11, single point mass sensor;12, rotation speed measuring sensor;13, second support;14, third support;15, bearing;16, shaft coupling;17, transmission shaft;18, mounting disc;19, telescopic arm;20, support disc. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, not as any limitation on the utility model and its application or use.

[0024] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more. In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] Embodiment one

[0026] The embodiment provides a rotating platform for mechanical dynamic behavior and performance test, which comprises a rotating disc 6, a driving device and a braking device 4, the rotating disc 6 is connected with the driving device, the rotating disc 6 is driven to rotate through the driving device, a measured mechanical is installed on the rotating disc 6, and the braking device 4 is installed on the driving device and used for controlling braking when the driving device works.

[0027] The braking device 4 adopts comprehensive braking of electrical braking and mechanical braking, the mechanical braking can select a YWZ9 series electric hydraulic brake, for example, a YWZ9-315 / E80 type, taking an electric hydraulic pusher as a power source, under the control of an electrical system, hydraulic oil pushes a brake block to be in contact with a brake wheel to realize braking. The electrical braking of the motor 1 can be matched with the electrical braking to realize preliminary speed reduction through the electrical braking when the equipment brakes, the speed is reduced, then the mechanical braking is realized through the electric hydraulic brake, precise parking and reliable braking are realized, the electrical braking of the motor 1 is realized through a frequency converter and a controller, the frequency converter is connected with the controller, the output and parameter setting of the frequency converter are realized, the frequency converter is connected with the motor 1, the motor 1 moves through the control of the frequency converter, the frequency converter is ACS580-01-145A-4 type, and the controller is AC500 type.

[0028] The driving device comprises a motor 1 and a main shaft 3, one end of the main shaft 3 is connected with the output end of the motor 1, the other end is connected with the rotating disc 6, and the brake device 4 is installed on the main shaft 3.

[0029] The motor 1 is a QABP280SMA 2 of ABB Company, the power is 75kW, the rotating speed is 2980r / min, and the rated torque is 241Nm.

[0030] The overspeed device 7 is installed on the outer edge of the rotating disc 6, and is used for braking when the rotating speed of the rotating disc 6 exceeds the preset rotating speed, and the type is JXB / JGB.

[0031] The data acquisition system comprises a plurality of sensors, is used for acquiring the state data of the test platform, acquires the parameters of the components in the test platform through the positions of the sensors installed on the test platform, ensures the normal operation of the components and analyzes the parameter changes of the components during operation, optimizes each component of the test platform, and ensures the stable operation of the test platform.

[0032] Embodiment two

[0033] The embodiment is based on embodiment 1, and provides a rotating platform for testing mechanical dynamic behavior and performance, and the difference lies in that:

[0034] The driving device for driving the rotating disc 6 to rotate further comprises a transmission shaft 17, a coupling 16 and a speed reducer 2, the input end of the speed reducer 2 is connected with the output end of the motor 1 through the coupling 16, the output end of the speed reducer 2 is connected with the main shaft 3, the other end of the main shaft 3 is connected with the transmission shaft 17, the other end of the transmission shaft 17 is connected with the rotating disc 6, and the brake device 4 and the supporting device 5 are further arranged on the transmission shaft 17. The gear disc 8 is further arranged between the brake device 4 and the supporting device 5.

[0035] The brake device 4 takes an electric hydraulic pusher as a power source, under the control of an electrical system, the hydraulic oil pushes the brake block to contact the brake wheel to realize braking.

[0036] The support device 5 is mounted on the transmission shaft 17 through the bearing 15 for supporting the overspeed device 7, and the support device 5 comprises a mounting disc 18, telescopic arms 19 and a support disc 20, the mounting disc 18 is mounted on the transmission shaft 17 through the bearing 15, the telescopic arms 19 are mounted on one end of the mounting disc 18, and the support disc 20 is arranged on the other end of the telescopic arms 19, there are four telescopic arms 19 arranged in an equidistant ring on the mounting disc 18, the telescopic arms 19 are gear type telescopic arms 19, which are connected and mounted on the eccentric position of the gear through connecting rods, the other end of the connecting rods is connected with a large arm and a small arm, when the gear rotates, the angle between the large arm and the small arm changes, so that the telescopic effect is realized, the support diameter of the bottom of the overspeed device 7 can be widened, and the overspeed device 7 can be flexibly rotated to adapt to the slight deformation of the platform and keep firm connection. The support structure can be reliable and stable under the conditions of load and high-speed rotation, can uniformly distribute the load, guarantee the stability of the overall structure, adapt to the expansion demand of the platform, provide solid support for the normal operation of the overspeed device 7. The support arm is mounted on the mounting disc 18 through the slide rail and the locking device, the position of the support arm is adjusted through the slide rail and the locking device, the support diameter of the overspeed device 7 is widened again, when the volume and weight of the test piece on the rotating disc 6 are large, the support diameter of the overspeed device 7 supported by the support device 5 can be widened, so that the overspeed device 7 stably brakes the rotating disc 6. The support device 5 is made of high-strength aluminum alloy or carbon fiber composite material, has the characteristics of light weight, high rigidity and anti-vibration, avoids excessive load on the transmission shaft 17, and affects the operation of the equipment.

[0037] The data acquisition system includes a camera, a mass measuring device, a diameter measuring device, a rotating speed measuring device and a maintenance measuring device. The camera is installed on the holder 9, supports the camera to the same height as the rotating disc 6, and is located at the side of the rotating disc 6. The camera is a black and white high-speed camera, which is used to record the dynamic behavior of the test platform during rotation. The mass measuring device adopts a single-point mass sensor 11, which is supported by the second support 13 and located on the lower surface of the rotating disc 6. The single-point mass sensor 11 measures the mass of the rotating disc 6. The accurate measurement of the mass of the rotating disc 6 helps to master the actual mass of the rotating disc 6 during rotation, ensures the balance of the test platform during the experiment, and thus ensures that the test platform can stably and accurately simulate the operating state of the rotating machinery under different working conditions. The diameter measuring device adopts an inner and outer diameter universal measuring instrument, which is installed at the side of the measured part and is mainly used to measure the inner and outer diameters of the rotating parts on the rotating platform, including the transmission shaft 17, the stepped shaft on the main shaft 3, the gear, the groove and other rotating parts and the inner and outer diameter sizes of the related structures. Each inner and outer diameter universal measuring instrument measures one part. By setting several inner and outer diameter universal measuring instruments, the inner and outer diameter sizes of the rotating parts of the test platform during rotation are measured, the stability of the internal parts of the test platform during work is ensured, and the measured data is analyzed to optimize the parts of the test platform. The rotating speed measuring device adopts a rotating speed measuring sensor 12, which is supported by the third support 14 and located at the side of the gear disc 8. The rotating speed measuring sensor 12 is used in combination with the gear disc 8. The rotating speed measuring sensor 12 measures the rotating speed of the gear disc 8. Since the gear disc 8 is installed on the transmission shaft 17, the transmission shaft 17 is connected with the main shaft 3, and the rotating speed of the gear disc 8 is the rotating speed of the main shaft 3. The gap measuring device adopts a CCD laser micrometer. The laser micrometer is supported by the first support 10 and located at the side of the overspeed device 7. The laser micrometer is used to collect the gap between the release device and the pressure regulating valve of the overspeed device 7. Since the gap between the release device and the pressure regulating valve of the overspeed device 7 is a key parameter for checking whether the overspeed device 7 can work normally, by accurately measuring the gap, the state of the overspeed device 7 can be monitored in real time in the static and rotating state, so that the overspeed device 7 can effectively play a role during the operation of the equipment, abnormal conditions that may exist are found in time, the safe and stable operation of the rotating platform for mechanical dynamic behavior and performance test is ensured, and equipment damage or safety accidents caused by failure of the overspeed device 7 are avoided.

[0038] The motor 1 is a QABP 280SMA 2 of ABB Company, with a power of 75kW, a rotating speed of 2980r / min, and a rated torque of 241Nm. It is necessary to select a reducer 2 between the motor 1 and the main shaft 3. The selection of the reducer 2 is based on the rotating speed of the main shaft 3, the torque demand, and the output parameters of the motor 1. According to the demand, a corresponding specification is selected to ensure that the rated torque of the reducer 2 meets the demand. A Paramax® 9000 standard industrial gear box is selected, with a reduction ratio of 11.2. The model B-46-9030 of the reducer 2 is selected.

[0039] The test platform provided by the embodiment is installed on a vibration device to perform a test experiment, and the motor 1 and the speed reducer 2 are not fixed on the same platform, because the test vibration table requires high-precision fixing, so the speed reducer 2 is installed in the vibration table, and the motor 1 is arranged outside the vibration table, so an elastic coupling 16 needs to be used to connect the motor 1 and the speed reducer 2. The WSL3 type coupling 16 of Shanghai Yijia Transmission Company is selected. In order to ensure the stability and bending resistance of the main shaft 3 under high-speed rotation, the main shaft 3 with a length of 960 mm is selected, so as to balance the structural requirements of the equipment and avoid bending deformation, and at the same time, the high-torque transmission and dynamic braking force bearing of the 75kW high-power motor 1 are met, the rapid response in the overspeed device 7 is ensured, and long-term stable operation is ensured. The motor 1 control adopts an innovative design of two-inverter bus common point, that is, the two DC bus common points are connected together through a wire to form a common line open-winding topology structure.

[0040] The test platform provided by the embodiment works under the double protection of the brake device 4 and the overspeed device 7, realizes efficient and safe shutdown function, enhances the running stability of the platform under complex working conditions, and provides reliable guarantee for dynamic behavior test of the rotating machinery.

[0041] The above only describes preferred embodiments of the present application, and it should be pointed out that, for ordinary skilled persons in the technical field, some improvements and deformations can be made without departing from the technical principles of the present application, and these improvements and deformations should also be regarded as the protection scope of the present application.

Claims

1. A rotating platform for testing mechanical dynamic behavior and performance, characterized in that, It includes a rotating disk, a driving device, and a braking device; the rotating disk is driven to rotate by the driving device, and the braking device is used to control the braking of the driving device; The drive device includes a motor and a spindle. One end of the spindle is connected to the output end of the motor, and the other end is connected to the rotating disk. The braking device is mounted on the spindle. It also includes an overspeed device, installed on the outer edge of the rotating disk, for braking when the rotating disk speed exceeds a preset speed; It also includes a data acquisition system for collecting status data of the test platform components.

2. The rotating platform for testing mechanical dynamic behavior and performance according to claim 1, characterized in that, The drive device also includes a drive shaft, and the main shaft is connected to the rotating disk via the drive shaft.

3. The rotating platform for testing mechanical dynamic behavior and performance according to claim 2, characterized in that, The braking device is mounted on the drive shaft.

4. The rotating platform for testing mechanical dynamic behavior and performance according to claim 1, characterized in that, The data acquisition system includes a camera, a mass measuring device, a diameter measuring device, a speed measuring device, and a gap measuring device. The camera is used to record the dynamic behavior of the test platform during operation. The mass measuring device is used to measure the mass of the rotating disk. The diameter measuring device is used in the test platform. The speed measuring device is used to measure the speed of the spindle. The gap measuring device is used to measure the gap between the trip unit and the pressure regulating valve in the overspeed device. The pressure regulating valve and the trip unit are used together to control the operation of the overspeed device.

5. The rotating platform for testing mechanical dynamic behavior and performance according to claim 4, characterized in that, The camera is mounted on a gimbal, which supports the camera at the same height as the rotating disk. The gap measuring device includes a CCD laser micrometer, which is mounted on a first bracket. The mass measuring device includes a single-point mass sensor, which is mounted on a second bracket and located at the bottom of the rotating disk. The rotation speed measuring device includes a rotation speed measuring sensor and a mounting gear disk, which is mounted on the main shaft between the rotating disk and the braking device. The rotation speed measuring sensor is mounted on a third bracket and located on the side of the mounting gear disk. The diameter measuring device uses a universal internal and external diameter measuring instrument, which is mounted on the side of the part to be measured via a mounting bracket.

6. The rotating platform for testing mechanical dynamic behavior and performance according to claim 1, characterized in that, The motor output is connected to the reducer input via a coupling, and the reducer output is connected to one end of the main shaft.

7. The rotating platform for testing mechanical dynamic behavior and performance according to claim 1, characterized in that, It also includes a support device for supporting the overspeed device. The support device is mounted on the transmission shaft connected to the main shaft and the rotating disk by bearings. The support device includes a mounting plate and a telescopic arm. One end of the telescopic arm is mounted on the mounting plate, and the other end is mounted on a support plate. The support plate contacts and supports the bottom of the overspeed device. There are four telescopic arms arranged in a ring on the mounting plate.

8. The rotating platform for testing mechanical dynamic behavior and performance according to claim 1, characterized in that, The spindle is 960 mm long, 300 mm in diameter, made of 45 steel, and has a maximum torque capacity of 241 N·m.

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