Dynamic performance testing device for elevating machine

Abstract

The utility model belongs to the technical field of electrical debugging, and discloses an elevating machine power performance testing device, a switching gear box, a process motor and a dynamometer are fixed on the table top of a rack, and a water tank and a booster water pump are fixed on one side, close to the dynamometer, below the rack; the water tank is connected with the dynamometer through a rubber hose; the booster water pump is used for providing water delivery power for the water tank; the process motor is connected with the input end of the switching gear box through the coupler, and the input end of the switching gear box is connected with an input gear of the elevating machine. The gear interface of the dynamometer is engaged with the output gear of the elevating machine. According to the technical scheme of the utility model, the PLC is used as a main controller, operation parameters are set and control instructions are sent out through the operation panel, the use environment of the elevating machine is simulated, the elevating machine is driven to rotate in the forward direction, rotate in the reverse direction, change speed and regulate speed, and accurately set and shut down, the operation is simple and convenient, the function is complete, and the automation level of the artillery part testing device is improved.

Description

Technical Field

[0001] This utility model belongs to the field of electrical debugging technology, specifically relating to a high and low speed motor power performance testing device. Background Technology

[0002] During artillery tracking and aiming, the elevation angle must constantly change according to the target's movement. The elevation mechanism uses a servo motor as its power source. After being reduced in speed by a reducer, the servo motor drives the elevation gear transmission, imparting a specific elevation angle to the artillery according to firing requirements. During the gun adjustment process, the elevation mechanism needs to overcome the resistance generated by its own load, withstand large torques, and operate in a harsh environment. The gun adjustment effect of the elevation mechanism is related to the quality of its internal transmission efficiency, vibration, and other dynamic performance parameters, directly affecting the accuracy and reliability of firing.

[0003] During the production and assembly of the high-low lobe machine, the assembly personnel made multiple disassembly and adjustments to bring the machine up to design specifications. The entire debugging process was time-consuming and labor-intensive, which greatly affected the production schedule.

[0004] To improve the assembly efficiency and quality consistency of high and low latitude engines, it is essential to design a dynamic performance testing device for high and low latitude engines. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The technical problem to be solved by this utility model is to provide a device capable of testing high and low motor performance.

[0007] (II) Technical Solution

[0008] To solve the above-mentioned technical problems, this utility model provides a high and low dynamic performance testing device, including a test bench, a transfer gearbox, a process motor, a dynamometer, a water tank, a booster pump, a control cabinet, a speed sensor, a vibration sensor, and a noise sensor;

[0009] The test bench is equipped with a transfer gearbox, a process motor, and a dynamometer. A water tank and a booster pump are fixed on the side of the test bench near the dynamometer. The water tank is connected to the dynamometer via a rubber hose, and the booster pump is used to provide water to the water tank.

[0010] The process motor is connected to the input end of the adapter gearbox via a coupling, and the input end of the adapter gearbox is connected to the input gear of the high-low dynamometer; the gear interface of the dynamometer meshes with the output gear of the high-low dynamometer.

[0011] The control cabinet contains a PLC, a frequency converter, an operation panel, a power interface, and a signal interface. The power interface is connected to the electrical components of the control cabinet; the signal interface is connected to the control components of the control cabinet; one end of the frequency converter is connected to an external power source through the power interface, and the other end is connected to the process motor through a motor cable.

[0012] Each of the high- and low-speed motors has a fixed speed sensor at its input and output terminals to test its speed and torque.

[0013] Vibration sensors and noise sensors are installed on the periphery of the high and low machine housings to measure vibration and noise parameters during the transmission process, respectively.

[0014] The speed sensor, vibration sensor, and noise sensor are all connected to the PLC, and the PLC is connected to the operation panel and the frequency converter.

[0015] The adapter gearbox is a single-stage transmission. The output gear of the adapter gearbox has the same number of teeth as the high and low gears, and they work together to achieve a 1:1 transmission ratio.

[0016] The maximum speed of the coupling is 4000 rpm.

[0017] The coupling has a telescopic range of 32mm.

[0018] The rated power of the process motor is 2.2kW.

[0019] The rated torque of the process motor is 4.2 N·m.

[0020] The rated speed of the process motor is 3500 rpm.

[0021] (III) Beneficial Effects

[0022] Compared with the prior art, the present invention has the following advantages: using a PLC as the main controller, the operating parameters are set and control commands are issued through the operation panel, simulating the use environment of the elevation and ellipse machine, driving the elevation and ellipse machine to rotate forward, reverse, change speed, and accurately set and stop, making the operation simple and the functions complete, thus improving the automation level of the artillery component testing device. Attached Figure Description

[0023] Figure 1 This is a control block diagram of the present invention;

[0024] Figure 2 This is a front view of the experimental apparatus of the present invention;

[0025] Figure 3 This is a top view of the test apparatus of the present invention.

[0026] The following numbers are labeled in the diagram: 1-Bench; 2-Transfer gearbox; 3-Process motor; 4-Dynamometer; 5-Water tank; 6-Booster pump; 7-Control cabinet; 8-PLC; 9-Operator panel; 10-Speed ​​sensor; 11-Vibration sensor; 12-Noise sensor. Detailed Implementation

[0027] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0028] The high and low speed motor performance testing device of this embodiment includes a stand 1, a transfer gearbox 2, a process motor 3, a dynamometer 4, a water tank 5, a booster water pump 6, a control cabinet 7, a PLC 8, an operation panel 9, a speed sensor 10, a vibration sensor 11, and a noise sensor 12.

[0029] The tabletop of the test stand 1 is used to fix the transfer gearbox 2, the process motor 3, and the dynamometer 4. The side of the test stand 1 near the dynamometer is used to fix the water tank 5 and the booster pump 6.

[0030] The process motor 3 is connected to the speed sensor 10 via a coupling, and the speed sensor 10 is meshed with the transfer gearbox 2 with the same loading torque via a coupling. The dynamometer 4 is meshed with the output gear of the high and low speed machine.

[0031] The coupling has a maximum speed of 4000 rpm, a torque of 22.4 N·m, and a telescopic range of 32 mm.

[0032] The adapter gearbox 2 is a single-stage transmission. The output gear of the adapter gearbox 2 has the same number of teeth as the high and low gears, and they work together to achieve a 1:1 transmission ratio.

[0033] Process motor 3 provides the power required for the test, with a rated power of 2.2kW, a rated torque of 4.2N·m, and a rated speed of 3500rpm. It can achieve constant torque stepless speed regulation from 0rpm to 3500rpm and constant power stepless speed regulation from 3500rpm to 5800rpm.

[0034] The dynamometer 4 is a device that uses the principle of power loss for loading. After loading, the torque detection device monitors the changes in parameters in real time, achieving on-demand loading, testing, and judgment of the performance of the tested component. It is used to simulate the output performance of various power devices, providing load for high and low speed machine tests. It is suitable for torque and power testing of low-speed, high-power machinery. The dynamometer 4 is water-cooled, with low noise and low vibration. The water tank 5 is connected to the dynamometer via a rubber hose, and the booster water pump 6 provides the power for water supply.

[0035] The control cabinet 7 contains a PLC 8, a frequency converter, an operation panel 9, a power interface, and a signal interface. The power interface is connected to the electrical components of the control cabinet 7 and has electrical overcurrent, short circuit, open circuit, and leakage grounding protection functions. The signal interface is connected to the control components of the control cabinet 7. Various sensors collect signals, which are then filtered, amplified, and modulated before being processed by the PLC 8 for signal processing and fault diagnosis, and finally sent to the touch screen for display and storage.

[0036] One end of the frequency converter is connected to an external power source via a power interface, and the other end is connected to a process motor via a motor cable.

[0037] The speed sensor 10 is fixed at the input and output terminals of the high and low speed machines to test the speed and torque.

[0038] Vibration sensor 11 and noise sensor 12 are installed on the periphery of the high and low housings to measure vibration and noise parameters during the transmission process, respectively.

[0039] The specific working process of this system is as follows:

[0040] S1: Motor frequency conversion control

[0041] 1.1 The process motor 3 adjusts the motor speed by controlling the frequency converter to complete the power performance test of constant load transmission at different speeds.

[0042] When the number of pole pairs p is constant, the actual speed of the motor is:

[0043] n = 60f(1-s)p

[0044] Where f is the operating frequency, s is the slip, and p is the number of pole pairs.

[0045] Above the base frequency, the motor operates on constant power regulation; the higher the frequency, the faster the speed. Below the base frequency, the motor operates on constant torque regulation; the speed decreases as the frequency decreases.

[0046] 1.2 The process motor 3 provides the loading torque, which, through a left-hand / right-hand thread and a compressed spring, drives the friction plate to apply pressure to the friction wheel, thereby achieving the purpose of loading the high and low machine frame shafts. By using the motor to apply the loading torque and compress the spring, the transmission mechanism can be precisely controlled.

[0047] 1.3 The speed sensor monitors the actual motor speed, controls it through the PLC, and feeds back the compensation amount to the motor, thereby achieving accurate and reliable loading torque.

[0048] Compensation amount = Preset motor speed - Actual motor speed

[0049] S2: Dynamometer Simulation Load Control

[0050] The dynamometer 4, serving as a simulation loading device, includes an induction disc, magnetic powder, a stator, a rotor, an armature, and an excitation winding. A certain amount of magnetic powder is added to the working gap between the stator and rotor. When the coil is energized, magnetic flux is generated in the magnetic circuit, and the magnetic powder forms a magnetic powder chain under the influence of electromagnetic attraction. When the rotor rotates, the stator acts on the rotor through the magnetic powder chain, generating a braking torque. By changing the current in the coil, the magnitude of the electromagnetic attraction can be adjusted, thereby controlling the braking torque.

[0051] The output characteristics of dynamometer 4 are determined by the rotational speed and excitation current. When the current is constant, the dynamometer output is a stable torque curve dependent on the rotational speed. When the torque is constant, the output torque increases with increasing excitation current, then decreases steadily. PLC 8 controls dynamometer 4 to adjust the load torque, ensuring the stability of torque control and completing power performance tests for different load transmissions.

[0052] S3: High and low transmission efficiency

[0053] The speed sensor, via an elastic shaft and two sets of magnetoelectric signal generators, converts the measured torque and speed into two sets of alternating current signals with a phase difference. These two sets of alternating current signals have the same frequency and are proportional to the shaft speed, while the change in their phase difference is proportional to the measured torque. After measuring the input and output speed and torque, the transmission efficiency of the high and low speed transmissions is calculated.

[0054]

[0055] Where T1 and T2 are the input torque and output torque, respectively; η1 and η2 are the transmission efficiencies of the gearbox and coupling, respectively; p1 and p2 are the input and output power, respectively; and η is the high-low transmission efficiency.

[0056] Taking a certain type of high-low motor as an example, when the high-low motor is running normally, the rated power of the motor is 1.6kW and the rated speed is 3200rpm.

[0057] T1 = 5.4 N·111

[0058] T2 = 7.8 N·111

[0059] η1 = 89%

[0060] η2 = 95%

[0061] η = 81.88%

[0062] By adjusting the frequency converter, the input speed of the high and low speed machines is gradually increased in stages until the speed is finally stabilized at 2500 rpm. The no-load speed test is then carried out on the high and low speed machines to complete the no-load running-in test.

[0063] By adjusting the frequency converter, the speed of process motor 3 increases, so that the input speed of the high and low speed machines gradually increases in stages, and finally the speed stabilizes at 2500 rpm. At the same time, the dynamometer 4 adjusts the excitation current to gradually increase the load torque in stages, and finally stabilizes at 800 N·m. The input speed of the high and low speed machines is tested, and the running-in test under load is completed.

[0064] During the test, the high and low speeds were reduced to decrease noise and vibration, ensure smooth movement, and guarantee the test sample's noise level requirements, with the surface steady-state noise level being <125 dB.

[0065] This embodiment compares with existing technologies and, in combination with the characteristics of high and low locomotive components, designs a high and low locomotive power performance testing device by studying the assembly and adjustment process of the high and low locomotive. This device can conduct a run-in test on the high and low locomotive, simulate real gun adjustment conditions and various extreme situations, and pre-adjust the high and low locomotive, thereby improving the accuracy of high and low gear transmission, the smoothness of transmission, and the uniformity of load distribution.

[0066] Before the full gun assembly, tests were conducted on the various technical performance indicators of the elevation mechanism to verify the quality of the machining of the elevation mechanism's parts and the assembly of its components. Problems were identified in advance and solutions were developed. Test data was summarized and applied to other situations to further verify the reliability and stability of the elevation mechanism. This improved the assembly quality and overall assembly and adjustment efficiency of the elevation mechanism, reduced the workload during the full gun assembly, saved debugging time and human resources, and ensured the production schedule of the elevation mechanism.

[0067] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A high and low kinetic performance testing device, characterized in that, Includes a test bench, a transfer gearbox, a process motor, a dynamometer, a water tank, a booster pump, a control cabinet, a speed sensor, a vibration sensor, and a noise sensor; The test bench is equipped with a transfer gearbox, a process motor, and a dynamometer. A water tank and a booster pump are fixed on the side of the test bench near the dynamometer. The water tank is connected to the dynamometer via a rubber hose, and the booster pump is used to provide water to the water tank. The process motor is connected to the input end of the adapter gearbox via a coupling, and the input end of the adapter gearbox is connected to the input gear of the high-low dynamometer; the gear interface of the dynamometer meshes with the output gear of the high-low dynamometer. The control cabinet contains a PLC, a frequency converter, an operation panel, a power interface, and a signal interface. The power interface is connected to the electrical components of the control cabinet; the signal interface is connected to the control components of the control cabinet; one end of the frequency converter is connected to an external power source through the power interface, and the other end is connected to the process motor through a motor cable. Each of the high- and low-speed motors has a fixed speed sensor at its input and output terminals to test its speed and torque. Vibration sensors and noise sensors are installed on the periphery of the high and low machine housings to measure vibration and noise parameters during the transmission process, respectively. The speed sensor, vibration sensor, and noise sensor are all connected to the PLC, and the PLC is connected to the operation panel and the frequency converter.

2. The high and low kinetic performance testing device as described in claim 1, characterized in that, The adapter gearbox is a single-stage transmission. The output gear of the adapter gearbox has the same number of teeth as the high and low gears, and they work together to achieve a 1:1 transmission ratio.

3. The high and low kinetic performance testing device as described in claim 1, characterized in that, The maximum speed of the coupling is 4000 rpm.

4. The high and low dynamism performance testing device as described in claim 1, characterized in that, The coupling has a telescoping range of 32mm.

5. The high and low dynamism performance testing device as described in claim 1, characterized in that, The rated power of the process motor is 2.2kW.

6. The high and low kinetic performance testing device as described in claim 1, characterized in that, The rated torque of the process motor is 4.2 N·m.

7. The high and low dynamism performance testing device as described in claim 1, characterized in that, The rated speed of the process motor is 3500 rpm.

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