Generator shaft vibration force testing device

Abstract

The utility model discloses a generator shaft vibration force testing device, which comprises a bearing bottom plate and a to-be-tested assembly arranged on the top surface of the bearing bottom plate, two testing supports arranged side by side are arranged at the top of the bearing bottom plate, and a testing shaft in transmission connection with the to-be-tested assembly is inserted between the two testing supports. The test shaft is sleeved with a counterweight assembly used for gradually increasing counterweight to optimize test conditions, the counterweight assembly comprises a bearing disc detachably arranged on the outer surface of the test shaft in a sleeving mode, a plurality of circular grooves with the inclination not smaller than 10 degrees are formed in the bearing disc, the inner wall of each circular groove is connected with a rubber ring, and the inner diameter of the rear end of each rubber ring is smaller than the inner diameter of the middle of each rubber ring. And a counter weight is inserted into the rubber ring. According to the utility model, by adjusting the number and the weight of the counterweights, different grades of loads and inertia forces borne by the generator during working are simulated, so that different vibration test requirements are met, the vibration condition of the generator during operation is reflected more truly, and the test reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration force testing, in particular to a generator shaft vibration force testing device. Background Art

[0002] Vibration testing can be used to evaluate the vibration characteristics of a generator during operation, including vibration amplitude, frequency, and harmonic analysis. This helps optimize the generator's design, operating parameters, or maintenance strategies to improve performance and extend equipment life. During the generator shaft vibration force test, in order to measure the vibration level of the generator during actual operation, pressure is generally applied to the test shaft using a pressure device. However, in actual operation, the generator shaft is usually subjected to gravity and inertial forces, which cause the shaft to vibrate. Applying pressure to the shaft can only simulate the pressure on the shaft, but cannot simulate the effects of gravity and inertial forces, thus affecting the accuracy of the test results. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a generator shaft vibration force testing device to solve the problem raised in the above background technology that some generator shaft vibration force pressure tests may cause shaft deformation and damage, thereby affecting the accuracy of the test results.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a generator shaft vibration force testing device, comprising a load-bearing base plate and a component to be tested mounted on the top surface of the load-bearing base plate, wherein two test supports arranged side by side are mounted on the top of the load-bearing base plate, a test shaft connected to the component to be tested is inserted between the two test supports, and a counterweight assembly for gradually increasing counterweights to optimize test conditions is sleeved on the test shaft;

[0005] The counterweight assembly includes a bearing disc that is detachably mounted on the outer surface of the test shaft. The bearing disc is provided with a plurality of circular grooves with an inclination of not less than 10°. The inner wall of the circular groove is connected to a rubber ring whose rear end inner diameter is smaller than the middle inner diameter. A counterweight is inserted into the rubber ring.

[0006] The test support includes a limiting rod passing through the interior of the bearing disc.

[0007] Preferably, the carrying disc is attached to the downloading disc at the bottom of the test shaft, and notches and embedded grooves are provided on both sides of the top of the downloading disc, and the two embedded grooves are respectively located on the opposite sides of the two notches.

[0008] Preferably, an upper loading plate is provided on the top of the upper loading plate, and hole slot blocks adapted to the embedded groove are installed on both sides of the bottom of the upper loading plate, and a locking rod is threadedly connected to the inner wall of one side of the slot and inserted into the hole slot block along the embedded groove.

[0009] Preferably, the component to be tested includes a storage structure arranged above the bearing base plate, a test motor is placed on the storage structure, two connecting sleeves are provided on the bottom of the test motor, and a bidirectional screw rod passing through the connecting sleeves is installed on the storage structure.

[0010] Preferably, a rotating shaft is installed at the output end of the test motor, a coupling connected to the test shaft is installed at one end of the rotating shaft, and an electric telescopic rod for adjusting the height of the storage structure according to the specifications of the test motor is installed on the supporting base.

[0011] Preferably, a fixing seat connected to the limiting rod is installed on the bearing base plate, and a bearing seat is detachably installed on the top of the fixing seat.

[0012] Preferably, a limiting ring sleeved on the outer surface of the test shaft is detachably installed inside the bearing seat, and a sensor for testing the test shaft is plugged into the bearing seat.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. According to the test needs, the utility model can insert counterweights of set weights into several circular grooves in sequence. By adjusting the number and weight of the counterweights, the different levels of load and inertia force that the generator is subjected to during actual operation can be simulated to meet different vibration test requirements. At the same time, it can more realistically reflect the vibration conditions of the generator during operation, thereby increasing the reliability and practicality of the test.

[0015] 2. The load-bearing disc used to increase the test counterweight in the present invention is divided into two detachable parts, the upper and lower parts, which can be easily converted into a shaft vibration force test form without counterweight.

[0016] 3. In the present invention, the height of the storage structure and the distance between the two connecting sleeves can be adjusted according to the specifications of the test motor, thereby effectively improving the adaptability of shaft vibration force testing for generators of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic structural diagram of the test support of the utility model;

[0019] Figure 3 This is a schematic diagram of the disassembled structure of the counterweight assembly of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the load-bearing disc and the test shaft of the utility model;

[0021] Figure 5This is a schematic diagram of the disassembled structure of the component to be tested in the utility model.

[0022] In the picture:

[0023] 1. Load-bearing base plate;

[0024] 2. Component under test; 201. Storage structure; 202. Test motor; 2021. Rotating shaft; 2022. Coupling; 203. Connecting sleeve; 204. Bidirectional screw; 205. Electric telescopic rod;

[0025] 3. Test support; 301. Limit rod; 302. Fixed seat; 303. Bearing seat; 304. Limit ring; 305. Sensor;

[0026] 4. Test axis;

[0027] 5. Counterweight assembly; 501. Loading disc; 5011. Download disc; 5012. Notch; 5013. Loading disc; 5014. Hole slot block; 5015. Locking rod; 502. Circular groove; 503. Rubber ring; 504. Counterweight. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Figure 1-Figure 5 The present invention is an embodiment of the present invention. The specific problem addressed by this embodiment is that when a generator performs a shaft vibration force test, a pressure device is used to apply pressure to the shaft to simulate the actual working load of the generator. Generally, only the pressure on the shaft can be simulated, but the effects of gravity and inertia force cannot be simulated. In addition, the pressure may cause deformation and damage to the shaft, thereby affecting the accuracy of the test results. This embodiment specifically proposes a generator shaft vibration force test device, wherein a component under test 2 is mounted on the top surface of a load-bearing base plate 1, and two test supports 3 are installed on the top of the load-bearing base plate 1. A test shaft 4, which is transmission-connected to the component under test 2, is inserted between the two test supports 3. A counterweight assembly 5 is mounted on the test shaft 4 to gradually increase the counterweight to optimize the test conditions. By docking the component under test 2 with the test shaft 4, and then operating the component under test 2 to control the test shaft 4 to rotate, the vibration generated by the test shaft 4 during rotation is transmitted to the detection structure on the test support 3, thereby checking and testing the vibration frequency. During the process, the counterweight assembly 5 facilitates the generator to simulate vibration tests under different counterweights, thereby improving the accuracy of the overall test.

[0030] like Figure 1 、 Figure 3 and Figure 4 As shown, the counterweight assembly 5 of this embodiment includes a bearing disc 501 that is removably mounted on the outer surface of the test shaft 4. The bearing disc 501 is provided with a plurality of circular grooves 502 with an inclination of not less than 10°. The inner wall of the circular grooves 502 is connected to a rubber ring 503 whose rear end inner diameter is smaller than the middle inner diameter. Counterweights 504 are inserted into the rubber ring 503. In actual application, by mounting the bearing disc 501 on the test shaft 4, a basis for the subsequent gradual addition of counterweights is provided. Subsequently, counterweights 504 of set weights are sequentially inserted into the plurality of circular grooves 502 as required by the test. By adjusting the number and weight of the counterweights 504, different levels of load and inertia forces experienced by the generator during actual operation can be simulated to meet different vibration test requirements. This more realistically reflects the vibration conditions of the generator during operation, thereby increasing the reliability and practicality of the test and ensuring effective evaluation and analysis of the generator's vibration characteristics. The rubber ring 503 disposed within the circular groove 502 is used to increase the secureness of the counterweight 504 when inserted, preventing it from falling due to vibration. The rubber ring 503 has a relatively small inner diameter at the downwardly inclined end near the circular groove 502, which, combined with the inclined arrangement of the circular groove 502, further effectively prevents the inserted counterweight 504 from falling. The test support 3 includes a limiting rod 301 extending through the interior of the bearing disc 501 to restrain the bearing disc 501 and prevent it from rotating with the test shaft 4.

[0031] It is worth mentioning that, in this embodiment, Figure 1 and Figure 3 As shown, the carrying disc 501 is attached to the downloading disc 5011 at the bottom of the test shaft 4, and notches 5012 and embedded grooves are provided on both sides of the top of the downloading disc 5011, and the two embedded grooves are respectively located on the opposite sides of the two notches 5012. An upper loading disc 5013 is provided on the top of the downloading disc 5011, and hole slot blocks 5014 adapted to the embedded grooves are installed on both sides of the bottom of the upper loading disc 5013. A locking rod 5015 is threadedly connected to the inner wall of one side of the notch 5012 and inserted into the hole slot block 5014 along the embedded groove. By fitting the downloading disk 5011 to the lower surface of the test shaft 4 and moving it toward one side, the limiting rod 301 is inserted into it, and then the upper loading disk 5013 is combined with the downloading disk 5011, so that the hole slot block 5014 is inserted into the interior of the embedded groove, and then the locking rod 5015 is rotated toward one side so that one end of it is inserted into the hole slot block 5014 in the embedded groove, thereby achieving a firm combination of the upper loading disk 5013 and the downloading disk 5011, and easy disassembly.

[0032] There are many types of specifications of generators to be tested. In order to improve the adaptability of shaft vibration force testing for generators of different specifications, such as Figure 1 and Figure 5 As shown, the component under test 2 includes a storage structure 201 disposed above the supporting base plate 1. A test motor 202 is placed on the storage structure 201. Two coupling sleeves 203 are provided at the bottom of the test motor 202. A bidirectional screw 204 is installed on the storage structure 201 and passes through the coupling sleeves 203. A rotating shaft 2021 is installed at the output end of the test motor 202. A coupling 2022 connected to the test shaft 4 is installed at one end of the rotating shaft 2021. An electric telescopic rod 205 is installed on the supporting base plate 1 for adjusting the height of the storage structure 201 according to the specifications of the test motor 202. The bidirectional screw 204 is rotated according to the specifications of the test motor 202, and the distance between the two coupling sleeves 203 is controlled to adapt to the bottom base shape of the test motor 202. The test motor 202 is then inserted along one side of the two coupling sleeves 203. In addition, the electric telescopic rod 205 is operated according to the distance between the bottom of the test motor 202 and the central axis of the rotating shaft 2021. The electric telescopic rod 205 is extended upward or retracted downward to control the storage structure 201 to adjust the height position of the test motor 202 accordingly, so as to make it more convenient to connect the rotating shaft 2021 and the test shaft 4 through the coupling 2022. After the connection is completed, the bottom base of the test motor 202 and the connecting sleeve 203 are fixed with screws, so that the test motor 202 can be stably placed on the storage structure 201.

[0033] like Figure 1 and Figure 2 As shown, a fixing base 302 connected to a limiting rod 301 is mounted on the support base 1. A bearing seat 303 is detachably mounted on top of the fixing base 302. A limiting ring 304, which is removably mounted inside the bearing seat 303 and sleeved on the outer surface of the test shaft 4, is detachably mounted on the bearing seat 303. A sensor 305 for detecting the test shaft 4 is plugged into the bearing seat 303. The limiting ring 304 is replaceable, allowing it to be easily swapped according to the diameter of the test shaft 4. The sensor 305 is used to detect the vibration force generated by the test shaft 4 during its rotation in real time.

[0034] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A generator shaft vibration force testing device, comprising a bearing base plate (1) and a component to be tested (2) mounted on the top surface of the bearing base plate (1), characterized in that: Two test supports (3) arranged side by side are installed on the top of the bearing base plate (1); a test shaft (4) drivingly connected to the component to be tested (2) is inserted between the two test supports (3); and a counterweight component (5) for gradually increasing the counterweight to optimize the test conditions is sleeved on the test shaft (4); The counterweight assembly (5) comprises a bearing disc (501) detachably sleeved on the outer surface of the test shaft (4), a plurality of circular grooves (502) with an inclination of not less than 10° are formed on the bearing disc (501), a rubber ring (503) with a rear end inner diameter smaller than a middle inner diameter is connected to the inner wall of the circular groove (502), and a counterweight (504) is inserted into the rubber ring (503); The test support (3) comprises a limiting rod (301) passing through the interior of the bearing disc (501).

2. The generator shaft vibration force testing device according to claim 1, characterized in that: The bearing disc (501) is fitted onto a downloading disc (5011) at the bottom of the test shaft (4), and notches (5012) and embedded grooves are provided on both sides of the top of the downloading disc (5011), and the two embedded grooves are located on opposite sides of the two notches (5012).

3. The generator shaft vibration force testing device according to claim 2, characterized in that: An upper loading plate (5013) is arranged on the top of the downloading plate (5011), and hole slot blocks (5014) adapted to the embedded groove are installed on both sides of the bottom of the upper loading plate (5013), and a locking rod (5015) is threadedly connected to the inner wall of one side of the notch (5012) and inserted into the hole slot block (5014) along the embedded groove.

4. The generator shaft vibration force testing device according to claim 1, characterized in that: The component to be tested (2) comprises a storage structure (201) arranged above the bearing base plate (1), a test motor (202) is placed on the storage structure (201), two connection sleeves (203) are sleeved on the bottom of the test motor (202), and a bidirectional screw rod (204) passing through the connection sleeves (203) is installed on the storage structure (201).

5. The generator shaft vibration force testing device according to claim 4, characterized in that: A rotating shaft (2021) is installed at the output end of the test motor (202), a coupling (2022) connected to the test shaft (4) is installed at one end of the rotating shaft (2021), and an electric telescopic rod (205) for adjusting the height of the storage structure (201) according to the specifications of the test motor (202) is installed on the bearing base plate (1).

6. The generator shaft vibration force testing device according to claim 1, characterized in that: A fixing seat (302) connected to the limiting rod (301) is installed on the bearing base plate (1), and a bearing seat (303) is detachably installed on the top of the fixing seat (302).

7. The generator shaft vibration force testing device according to claim 6, characterized in that: A limiting ring (304) sleeved on the outer surface of the test shaft (4) is detachably mounted inside the bearing seat (303), and a sensor (305) for detecting the test shaft (4) is plugged into the bearing seat (303).

Images