Test device for isolating generator vibration and use method thereof

Abstract

The invention relates to the technical field of motor test equipment, in particular to a test device for isolating generator vibration and a use method thereof. In order to solve the problems of insufficient external vibration isolation, structural adaptability, working condition adjustment flexibility, data acquisition precision and the like in the prior art, the invention provides the following technical scheme that the device comprises a base, a supporting platform is mounted above the base, a generator set is mounted at the top of the supporting platform, and a motor is mounted in the lower part of the supporting platform; a transmission shaft for connecting the motor and the generator set is arranged between the motor and the generator set; the supporting platform comprises a lower support in threaded connection with the base, and the lower support is fixedly connected with a plurality of sets of organic glass plates which are oppositely arranged through threads. External vibration interference can be effectively isolated, data accuracy is improved, the device is simple in structure and convenient to mount, adapts to different types of generators, can flexibly adjust working conditions, realizes integration of data acquisition and analysis, is wide in application scene, and improves test efficiency and reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of motor testing equipment, and in particular to a testing device for isolating generator vibration and a method for using the same. Background Art

[0002] In the field of power equipment R&D and operation and maintenance, the vibration characteristics of generators are core indicators for assessing their operational reliability, service life, and potential failure risks. Generator vibrations generated under varying speeds and loads can not only cause mechanical failures such as bearing wear and drive shaft fatigue fractures, but can also trigger resonance in surrounding equipment through structural transmission, thereby affecting the stability of the entire power system. Therefore, accurately collecting and analyzing generator vibration data under various operating conditions is crucial for optimizing product design, improving production quality, and formulating operation and maintenance strategies.

[0003] However, the existing generator vibration testing technology still has many problems that need to be solved:

[0004] On the one hand, traditional test equipment struggles to effectively isolate external vibration interference. Ground resonance within the test environment and mechanical vibrations from other equipment can easily be transmitted to the test system through the supporting structure, causing the data collected by the vibration sensor to be mixed with a large amount of irrelevant noise, obscuring the generator's true vibration characteristics. For example, vibrations from machine tools in the workshop and impact vibrations from passing ground vehicles can increase test errors by over 30%, seriously affecting the judgment of the generator's vibration characteristics.

[0005] On the other hand, existing devices lack structural adaptability and operational flexibility. Most test platforms use a fixed frame design that can only accommodate specific generator models. Equipment of different power and size requires readjustment of the mechanical structure, making the installation process cumbersome and time-consuming.

[0006] In summary, existing technologies lack external vibration isolation, structural adaptability, operating condition adjustment flexibility, and data acquisition accuracy, limiting the reliability and application value of generator vibration test results. Therefore, the present invention proposes a vibration testing device that effectively shields against external interference, adapts to multiple equipment models, supports continuous testing under multiple operating conditions, and is easy to operate. Summary of the Invention

[0007] The purpose of the present invention is to address the problems in the prior art in terms of external vibration isolation, structural adaptability, working condition adjustment flexibility and data acquisition accuracy, and to propose a test device for isolating generator vibration and a method for using the same.

[0008] The technical solution of the present invention is a test device for isolating generator vibration, comprising a base, a support platform mounted above the base, a generator set mounted on top of the support platform, a motor mounted inside the lower portion of the support platform, and a transmission shaft connected between the motor and the generator set;

[0009] The support platform includes a lower support threadedly connected to the base, and multiple groups of relatively arranged organic glass plates are fixedly connected to the lower support by threads. A connecting aluminum rod is provided between two groups of organic glass plates at the same height. The support platform also includes at least three groups of bearing kits, which radially fix the drive shaft. The support platform also includes a generator mounting platform arranged on the top of the organic glass plate.

[0010] Optionally, the bearing kit is fixedly connected to a connecting aluminum rod, and both ends of the connecting aluminum rod are respectively fixedly connected to two oppositely arranged organic glass plates for tightening and fixing.

[0011] Optionally, the base includes a fixed support plate, a fixed support screw and a fixed support screw, and the motor is fixedly mounted on the base.

[0012] Optionally, the driving shaft of the motor is detachably connected to one end of the transmission shaft via a coupling;

[0013] The control end of the motor is connected to a controller for controlling the rotation speed of the motor.

[0014] Optionally, the transmission shaft includes two half-transmission shafts and a transmission shaft sleeve, the spline ends of the two half-transmission shafts are respectively connected to the two ends of the transmission shaft sleeve through spline fitting, and the other ends of the two half-transmission shafts are respectively connected to the motor and the generator set through couplings.

[0015] Optionally, vibration sensors are installed on the transmission shaft, bearing kit, organic glass plate and generator set.

[0016] Optionally, the connection end of the vibration sensor is further connected to a PC end, and a power supply for supplying power to the vibration sensor is connected between the PC end and the vibration sensor.

[0017] The present invention also provides a method for using a test device for isolating generator vibration, comprising the following steps:

[0018] Step 1: Equipment installation: Fix the generator set on the generator mounting platform, connect the motor and generator set through the transmission shaft, and radially fix the transmission shaft with the bearing kit;

[0019] Step 2: Sensor placement: Fix the vibration sensor in the area to be measured and connect the vibration sensor to the power supply;

[0020] Step 3: Test start and parameter adjustment: Control the motor speed through the controller, and combine the motor to control the generator set to put the test device into working state;

[0021] Step 4: Vibration data collection: During the test, the vibration sensor combines the horizontal and vertical vibration signals and transmits them to the PC through the converter. The controller adjusts the motor speed to obtain vibration data at different speeds. The data collection can be repeated by changing the sensor position.

[0022] Step 5. Data analysis and report generation: Use a PC to analyze the stored vibration data, evaluate the vibration characteristics of the generator, support platform, and insulated drive shaft under different operating conditions, and generate a test report.

[0023] Optionally, the vibration sensor is connected by magnetic attraction and bolt connection;

[0024] The power supply is connected to the PC signal through a USB to RS-485 converter to complete the data transmission link.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] The present invention provides an isolated generator vibration test device, in which the base is used to support the entire device, thereby ensuring the stability of the device under test during vibration. The operation of the motor drives the support platform to vibrate, and the vibration conditions of different areas can be monitored in real time through sensors, so that the vibration conditions that the device under test may encounter under actual working conditions can be more accurately understood.

[0027] Furthermore, the generator vibration test device can effectively isolate external interference and provide accurate vibration data. The device has a simple structure and is easy to install. It is suitable for different types of generators and has good stability and adjustability.

[0028] The vibration data collected by this device can accurately reflect the operating status of the generator and is suitable for vibration performance testing and quality control of the generator;

[0029] In summary, the testing device and method of the present invention can effectively isolate external vibration interference and improve data accuracy. The device has a simple structure and is easy to install. It is adaptable to different types of generators, can flexibly adjust the working conditions, realizes integrated data acquisition and analysis, has a wide range of applicable scenarios, and improves test efficiency and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of a test setup for isolating generator vibration is given;

[0031] Figure 2 Schematic diagram of the supporting platform structure;

[0032] Figure 3 This is a schematic diagram of the installation of the base and motor;

[0033] Figure 4 This is a schematic diagram of the structure of the semi-transmission shaft of the vibration test device;

[0034] Figure 5 It is a structural diagram of the transmission shaft sleeve;

[0035] Reference numerals:

[0036] 1. Base; 1-1. Fixed support plate; 1-2. Fixed support screw; 2. Motor; 3. Drive shaft; 3-1. Half drive shaft; 3-2. Drive shaft sleeve; 4. Support platform; 4-1. Lower support; 4-2. Organic glass plate; 4-3. Connecting aluminum rod; 4-4. Bearing kit; 4-5. Generator mounting platform; 5. Generator set; 6. Vibration sensor; 7. Power supply; 8. PC terminal; 9. Controller. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0039] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0042] Example

[0043] like Figures 1 to 5 As shown, the present invention proposes a test device for isolating generator vibration, including a base 1, the base 1 including a fixed support screw 1-2 and a fixed support plate 1-1, a support platform 4 is installed above the base 1, a generator set 5 is installed on the top of the support platform 4, and a motor 2 is installed inside the lower part of the support platform 4. The motor 2 generates mechanical energy and drives the support platform 4 to vibrate while generating mechanical energy. The vibration is random vibration; the motor 2 is fixedly installed on the base 1, and a transmission shaft 3 for connecting the motor 2 and the generator set 5 is provided between the motor 2 and the generator set 5. The drive shaft of the motor 2 is detachably connected to one end of the transmission shaft 3 through a coupling; the control end of the motor 2 is connected to a controller 9 for controlling its speed.

[0044] The transmission shaft 3 includes two half transmission shafts 3-1 and a transmission shaft sleeve 3-2. The spline ends of the two half transmission shafts 3-1 are respectively connected to the two ends of the transmission shaft sleeve 3-2 through spline matching, and the other ends of the two half transmission shafts 3-1 are respectively connected to the motor 2 and the generator set 5 through couplings.

[0045] The support platform 4 includes a lower support 4-1 threadedly connected to the base 1, and multiple sets of relatively arranged organic glass plates 4-2 are fixedly connected to the lower support 4-1 by threads. A vibration sensor 6 is installed on the transmission shaft 3, the bearing kit 4-4, the organic glass plates 4-2 and the generator set 5. The connection end of the vibration sensor 6 is also connected to the PC end 8. A power supply 7 for powering the vibration sensor 6 is connected between the PC end 8 and the vibration sensor 6;

[0046] A connecting aluminum rod 4-3 is arranged between two groups of organic glass plates 4-2 at the same height. The support platform 4 also includes at least three groups of bearing kits 4-4. The bearing kits 4-4 are fixedly connected to the connecting aluminum rod 4-3. The two ends of the connecting aluminum rod 4-3 are respectively fixedly connected to two oppositely arranged organic glass plates 4-2 for tightening and fixing; the bearing kits 4-4 radially fix the drive shaft 3. The support platform 4 also includes a generator mounting platform 4-5 arranged on the top of the organic glass plate 4-2.

[0047] In this embodiment, a method for using the generator vibration test device is also provided, comprising the following steps:

[0048] Step 1: Equipment installation: Fix the generator set 5 on the generator mounting platform 4-5, connect the motor 2 and the generator set 5 through the transmission shaft 3, and radially fix the transmission shaft 3 with the bearing kit 4-4;

[0049] Step 2: Sensor arrangement: fix the vibration sensor 6 in the area to be measured and connect the vibration sensor 6 to the power supply 7;

[0050] Step 3: Test start and parameter adjustment: Control the speed of the motor 2 through the controller 9, and combine the motor 2 to control the generator set 5 to operate and put the test device into working state;

[0051] Step 4: Vibration data collection: During the test, the vibration sensor 6 combines the horizontal and vertical vibration signals and transmits them to the PC terminal 8 through the converter. The controller 9 adjusts the speed of the motor 2 to obtain vibration data at different speeds. The data collection can be repeated by changing the sensor position.

[0052] Step 5: Data analysis and report generation: Use PC terminal 8 to analyze the stored vibration data, evaluate the vibration characteristics of the generator, support platform and insulated drive shaft under different working conditions, and generate a test report.

[0053] The vibration sensor 6 is connected by means of magnetic attraction and bolt connection;

[0054] The power supply 7 is connected to the PC terminal 8 through a USB to RS-485 converter to complete the data transmission link.

[0055] Specifically, the base 1 serves as the basic supporting structure of the entire device. By cooperating with the fixed support plate 1-1 and the fixed support screw 1-2, it provides a stable installation reference for components such as the motor 2 and the support platform 4, effectively weakening the transmission of external environmental vibrations and reducing the impact of external interference on test accuracy from the source.

[0056] Motor 2 is fixedly mounted on base 1. The mechanical energy generated by its operation is transmitted to generator set 5 via an insulated drive shaft 3. Two half-drive shafts 3-1 are splined to a drive shaft sleeve 3-2, forming a removable transmission structure. This ensures efficient energy transfer and facilitates equipment installation and maintenance. The drive shaft of motor 2 is detachably connected to the drive shaft 3 via a coupling, further enhancing the adaptability of the transmission system. Simultaneously, controller 9 simulates the operating state of generator set 5 under different operating conditions by adjusting motor 2's input parameters, such as current and voltage, and varying its speed.

[0057] Support platform 4 serves as the core of the load-bearing and vibration transmission for generator set 5. Its structural design directly impacts test stability: lower support 4-1 is secured to base 1 via threads, ensuring the overall rigidity of the support platform. Multiple sets of opposing plexiglass panels 4-2 are tightened and secured via connecting aluminum rods 4-3, forming a lightweight and high-strength frame structure. This not only provides stable support for generator set 5 but also evenly transmits the random vibrations generated by motor 2 to generator set 5, simulating the vibration environment experienced during actual operation. Furthermore, three sets of bearing assemblies 4-4 are secured to connecting aluminum rods 4-3, providing radial positioning for drive shaft 3. This reduces radial runout during transmission, ensures the stability of kinetic energy transfer, and avoids additional vibration interference introduced by drive shaft sway.

[0058] The vibration test system achieves precise monitoring through multi-point acquisition and data links; vibration sensors 6 are installed on key locations such as the drive shaft 3, bearing kit 4-4, organic glass plate 4-2 and generator set 5 housing, and can synchronously acquire horizontal and vertical vibration signals; the power supply 7 continuously supplies power to the sensor to ensure the continuity of signal acquisition; the vibration data collected by the sensor is transmitted to the PC via a converter, such as USB to RS-485, 8, which stores, processes and analyzes the data through pre-installed analysis software, and finally generates a test report reflecting the vibration characteristics of the generator at different speeds and positions.

[0059] The generator mounting platform 4-5 is the direct bearing component of the generator set 5 and is fixedly connected to the generator set 5 by bolts to ensure that the generator is not loose or offset during the vibration test, thereby ensuring the authenticity and consistency of the vibration signal.

[0060] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art may make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A test device for isolating generator vibration, characterized in that: The invention comprises a base (1), a support platform (4) is installed above the base (1), a generator set (5) is installed on the top of the support platform (4), a motor (2) is installed inside the bottom of the support platform (4), and a transmission shaft (3) is provided between the motor (2) and the generator set (5) for connecting the two; The support platform (4) includes a lower support (4-1) threadedly connected to the base (1); a plurality of groups of relatively arranged organic glass plates (4-2) are fixedly connected to the lower support (4-1) by means of threads; a connecting aluminum rod (4-3) is provided between two groups of organic glass plates (4-2) at the same height; the support platform (4) also includes at least three groups of bearing kits (4-4); the bearing kits (4-4) radially fix the transmission shaft (3); and the support platform (4) also includes a generator mounting platform (4-5) provided on top of the organic glass plates (4-2).

2. A test device for isolating generator vibration according to claim 1, characterized in that: The bearing kit (4-4) is fixedly connected to the connecting aluminum rod (4-3), and both ends of the connecting aluminum rod (4-3) are respectively fixedly connected to two oppositely arranged organic glass plates (4-2) for tightening and fixing.

3. A test device for isolating generator vibration according to claim 1, characterized in that: The base (1) comprises a fixed support plate, a fixed support screw (1-2) and a fixed support screw (1-2), and the motor (2) is fixedly mounted on the base (1).

4. A test device for isolating generator vibration according to claim 1, characterized in that: The driving shaft of the motor (2) is detachably connected to one end of the transmission shaft (3) via a coupling; The control end of the motor (2) is connected to a controller (9) for controlling its rotation speed.

5. The test device for isolating generator vibration according to claim 1, characterized in that: The transmission shaft (3) comprises two half transmission shafts (3-1) and a transmission shaft sleeve (3-2); the spline ends of the two half transmission shafts (3-1) are respectively connected to the two ends of the transmission shaft sleeve (3-2) through spline matching; and the other ends of the two half transmission shafts (3-1) are respectively connected to the motor (2) and the generator set (5) through couplings.

6. A test device for isolating generator vibration according to claim 1, characterized in that: A vibration sensor (6) is installed on the transmission shaft (3), the bearing kit (4-4), the organic glass plate (4-2) and the generator set (5).

7. A test device for isolating generator vibration according to claim 6, characterized in that: The connection end of the vibration sensor (6) is also connected to a PC end (8), and a power supply (7) for supplying power to the vibration sensor (6) is connected between the PC end (8) and the vibration sensor (6).

8. A method for using the test device for isolating generator vibration according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Fix the generator set (5) on the generator mounting platform (4-5), connect the motor (2) and the generator set (5) through the transmission shaft (3), and radially fix the transmission shaft (3) with the bearing kit (4-4); Step 2: Fix the vibration sensor (6) to the area to be measured, and connect the vibration sensor (6) to the power supply (7); Step 3: Control the rotation speed of the motor (2) through the controller (9), and control the generator set (5) in conjunction with the motor (2) to operate so that the test device enters a working state; Step 4: During the test, the vibration sensor (6) combines the horizontal and vertical vibration signals and transmits them to the PC (8) through the converter. The controller (9) adjusts the speed of the motor (2) to obtain vibration data at different speeds. The data can be collected repeatedly by changing the sensor position. Step 5: Use the PC (8) to analyze the stored vibration data, evaluate the vibration characteristics of the generator, support platform and insulated transmission shaft under different working conditions, and generate a test report.

9. The method for using the test device for isolating generator vibration according to claim 8, characterized in that: The vibration sensor (6) is connected by means of magnetic attraction and bolt connection; The power supply (7) is connected to the PC terminal (8) via a USB to RS-485 converter to complete the establishment of a data transmission link.

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