A balancing and vibration testing device applied to diesel generator set

Abstract

The application relates to the technical field of balance and vibration detection, in particular to a balance and vibration testing device applied to a diesel generating set, which comprises a bottom mounting platform for mounting the diesel generating set and a bottom-mounted adjusting guide rail located at the periphery of the bottom mounting platform, a main adjusting frame with a door-shaped structure is movably assembled on the bottom-mounted adjusting guide rail, embedded electric control lifting guide rails are fixedly assembled on the two side walls of the main adjusting frame, and height-controllable adjusting assemblies are movably assembled on the two sides of the main adjusting frame through the embedded electric control lifting guide rails. Through the cooperative matching of the bottom-mounted adjusting guide rail, the embedded electric control lifting guide rail and the height-controllable adjusting assembly, multi-dimensional flexible adjustment of a pressure and vibration sensing unit in the axial direction, the height, the circumferential direction and the angle is realized, the limitation of traditional detection positions is broken through, and vibration data of different positions of the diesel generating set can be comprehensively captured.

Description

Technical Field

[0001] This invention relates to the field of balance and vibration testing technology, and in particular to a balance and vibration testing device for diesel generator sets. Background Technology

[0002] Diesel generator sets are core power equipment in industrial and agricultural production, emergency power supply, and other scenarios. Their operational balance and vibration status directly determine the equipment's reliability, service life, and operational safety. During operation, rotating parts of the unit must meet dynamic balance requirements, and the overall vibration speed must typically be controlled within 7.1 mm / s. The coaxiality of the coupling should not exceed 0.05 mm to avoid failures such as bearing wear, connector breakage, and winding insulation damage caused by imbalance and excessive vibration.

[0003] Currently, the industry mainly uses traditional testing methods to carry out balance and vibration testing: balance testing is mostly carried out offline by using dynamic balancing machines to test individual components such as crankshafts and rotors, while vibration testing uses equipment such as vibration sensors and dial indicators, which are manually placed at limited measuring points such as the unit support position and the middle of the machine body, and the vibration data under different working conditions are manually recorded, and then manually analyzed to determine whether it meets the standards.

[0004] Existing testing methods have significant drawbacks: First, they are inefficient. Offline balancing tests require disassembling components, and vibration tests require manual placement of sensors and data collection, which are cumbersome, time-consuming, and labor-intensive, making them unsuitable for mass production and rapid on-site testing. Second, the testing locations are limited. Traditional measurement point placement only covers a limited area of ​​the machine body, making it difficult to comprehensively capture the axial and radial vibration distribution of the unit and easily overlooking critical vibration hazards. Third, the testing accuracy is greatly affected by human operation. Manual placement of sensors, data recording, and analysis are prone to errors, and static testing cannot reflect the true vibration state of the unit during hot operation, resulting in insufficient reliability of the test results.

[0005] As diesel generator sets become more efficient and smaller, existing testing methods can no longer meet the actual production and maintenance needs. There is an urgent need for a balanced vibration testing technology that can overcome the limitations of testing location, improve testing efficiency, and ensure testing accuracy. This technology can solve the problems of time-consuming, labor-intensive, and incomplete testing in existing technologies, and ensure the stable and reliable operation of diesel generator sets. Summary of the Invention

[0006] The technical problem that this invention aims to solve is that current testing methods for diesel generator sets are time-consuming, labor-intensive, and incomplete.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a balance and vibration testing device for diesel generator sets, including a bottom mounting platform for mounting the diesel generator set and a bottom adjustment guide rail located around the bottom mounting platform. A main adjustment frame with a portal structure is movably mounted on the bottom adjustment guide rail. Embedded electronically controlled lifting guide rails are fixedly mounted on both sides of the main adjustment frame. Height-controllable adjustment components are movably mounted on both sides of the main adjustment frame through the embedded electronically controlled lifting guide rails. An electronically controlled tilting support is hinged to the height-controllable adjustment component. A pressure and vibration sensing unit is installed at the extended end of the electronically controlled tilting support through an elastic connector.

[0008] The lower ends of both sides of the main adjustment frame are fixedly installed with translation bases that cooperate with the bottom adjustment guide rail. The translation bases slide and translate along the bottom adjustment guide rail through the bottom drive adjustment wheel, which can drive the main adjustment frame to move along the axis of the diesel generator set, so as to realize the detection of different axial positions.

[0009] The embedded electrically controlled lifting guide rail includes an embedded lifting guide rail fixed inside the two side walls of the main adjustment frame and an electrically controlled lifting screw installed inside the embedded lifting guide rail. By rotating the electrically controlled lifting screw, the height controllable adjustment component can be driven to move up and down along the embedded lifting guide rail to adjust the detection height of the pressure and vibration sensing unit.

[0010] The height-controllable adjustment assembly includes an internally threaded lifting seat threaded onto an electrically controlled lifting screw, a lateral assembly shaft fixed to the outside of the internally threaded lifting seat, a lateral rotating seat mounted on the lateral assembly shaft, a rotation control assembly mounted on the lateral rotating seat, a tilting assembly frame hinged to the lateral rotating seat, and a lateral control strut for controlling the tilting assembly frame. The internally threaded lifting seat has an outwardly protruding internal toothed adjustment frame located around the lateral assembly shaft. The rotation control assembly engages with the internal toothed adjustment frame, causing the lateral rotating seat to rotate and adjust along the lateral assembly shaft, thereby adjusting the circumferential angle of the pressure and vibration sensing unit. The lateral control strut can adjust the tilting angle of the tilting assembly frame, further adjusting the detection angle to ensure the sensor is in contact with the unit's detection surface.

[0011] The rotation adjustment assembly includes a drive shaft that runs through the lateral rotating seat, a drive gear axially fixed to one end of the drive shaft, a drive worm gear axially fixed to the other end of the drive shaft, and a drive worm meshing with the drive worm gear. The drive gear meshes with the internal gear adjustment frame, and drives the drive worm gear to rotate through the drive worm, which in turn drives the drive shaft and drive gear to rotate, thereby causing the lateral rotating seat to rotate around the lateral assembly shaft, resulting in precise and stable adjustment.

[0012] The electrically controlled tilting strut is fixedly installed inside the tilting assembly frame. Its length can be extended and adjusted to move the elastic connector and pressure and vibration sensing unit closer to or away from the diesel generator set detection surface.

[0013] The flexible connector includes an external mounting bracket fixedly fitted to the extended end of the electrically controlled tilting strut, a lateral mounting spring mounted on the external mounting bracket, and an external detection cover mounted on the outer end of the lateral mounting spring. The lateral mounting spring can buffer the impact force during detection, avoiding damage caused by hard contact between the sensor and the unit surface, while ensuring that the external detection cover fits tightly with the unit surface, thus improving detection accuracy.

[0014] The pressure and vibration sensing unit includes a pressure sensor fixed on the outer arc-shaped contact surface of the external detection cover and a vibration sensor fixed on the inner arc-shaped surface of the external detection cover. The pressure sensor can detect the contact pressure between the sensor and the unit surface to ensure that the contact degree meets the standard, and the vibration sensor can accurately collect vibration data during the operation of the unit.

[0015] Two symmetrically arranged adjustable optical positioning probes are installed at the lower end of the top crossbeam of the main adjustment frame. These probes can accurately locate the position of the diesel generator set and assist in adjusting the detection position of the pressure and vibration sensing units to ensure accurate detection and avoid detection deviations.

[0016] The beneficial effects of this invention are: (1) This invention achieves multi-dimensional flexible adjustment of pressure and vibration sensing units in axial, height, circumferential and angle through the coordinated cooperation of bottom-mounted adjustment guide rail, embedded electronically controlled lifting guide rail and height controllable adjustment component, breaking through the limitations of traditional detection position, and can comprehensively capture vibration data of different positions of diesel generator set; (2) The use of electronic control drive to replace manual operation eliminates the need to disassemble unit components, realizes automated data acquisition, greatly improves testing efficiency, and reduces manual labor intensity; (3) By setting up flexible connectors and optical positioning probes, the detection accuracy and stability are improved, which solves the pain points of insufficient accuracy, time and labor, and incomplete detection in traditional testing methods. It is suitable for mass production and on-site rapid testing needs, and ensures the stable and reliable operation of diesel generator sets. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the overall assembly structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the highly controllable adjustment component in this invention.

[0021] Figure 4 This is a schematic diagram of the internal structure of the elastic connector in this invention.

[0022] In the diagram: 1. Bottom mounting platform; 2. Bottom adjusting guide rail; 3. Main adjusting frame; 4. Embedded electrically controlled lifting guide rail; 41. Embedded lifting guide rail; 42. Electrically controlled lifting screw; 5. Height-controllable adjustment assembly; 51. Internal thread lifting seat; 511. Internal gear adjusting frame; 52. Side assembly shaft; 53. Side rotating seat; 54. Rotation control assembly; 541. Transmission shaft; 542. Drive gear; 543. Drive worm gear; 544. Drive worm; 55. Tilting assembly frame; 56. Side control support rod; 6. Electrically controlled tilting support rod; 7. Elastic connector; 71. External mounting bracket; 72. Side assembly spring; 73. External detection cover; 8. Pressure and vibration sensing unit; 81. Pressure sensor; 82. Vibration sensor; 9. Translation base; 10. Bottom side drive adjusting wheel; 11. Position-adjustable optical positioning probe. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Figure 1 , Figure 2 , Figure 3 and Figure 4 The device shown is used for balancing and vibration testing of diesel generator sets. It includes a bottom mounting platform 1 for mounting the diesel generator set and a bottom adjustment rail 2 located around the bottom mounting platform 1. A main adjustment frame 3 with a portal structure is movably mounted on the bottom adjustment rail 2. Embedded electronically controlled lifting rails 4 are fixedly mounted on the two side walls of the main adjustment frame 3. Height-controllable adjustment components 5 are movably mounted on both sides of the main adjustment frame 3 through the embedded electronically controlled lifting rails 4. An electronically controlled tilting strut 6 is hinged to the height-controllable adjustment component 5. A pressure and vibration sensing unit 8 is installed at the extended end of the electronically controlled tilting strut 6 through an elastic connector 7.

[0026] The lower ends of both sides of the main adjustment frame 3 are fixedly installed with translation bases 9 that cooperate with the bottom adjustment guide rail 2. The translation bases 9 slide and move along the bottom adjustment guide rail 2 through the bottom drive adjustment wheel 10. When the drive mechanism of the bottom drive adjustment wheel 10 is activated, the translation bases 9 can be driven to slide smoothly along the bottom adjustment guide rail 2, thereby driving the main adjustment frame 3 and the detection components above it to move along the axial direction of the diesel generator set, so as to realize the detection coverage of different axial positions of the unit.

[0027] The embedded electric lifting guide rail 4 includes an embedded lifting guide rail 41 fixed inside the two side walls of the main adjustment frame 3 and an electric lifting screw 42 installed inside the embedded lifting guide rail 41. The electric lifting screw 42 is driven to rotate by a servo motor. Since the internal thread lifting seat 51 is threadedly engaged with the electric lifting screw 42 and the internal thread lifting seat 51 is slidably engaged with the embedded lifting guide rail 41, when the electric lifting screw 42 rotates, it can drive the internal thread lifting seat 51 to move up and down along the embedded lifting guide rail 41, thereby driving the height controllable adjustment component 5 to rise and fall as a whole, adjusting the detection height of the pressure and vibration sensing unit 8, and adapting to the detection needs of diesel generator sets of different heights.

[0028] The height-controllable adjustment assembly 5 includes an internally threaded lifting seat 51 threaded onto an electrically controlled lifting screw 42, a lateral mounting shaft 52 fixed to the outside of the internally threaded lifting seat 51, a lateral rotating seat 53 mounted on the lateral mounting shaft 52, a rotation control assembly 54 mounted on the lateral rotating seat 53, a tilting assembly frame 55 hinged to the lateral rotating seat 53, and a lateral control support rod 56 for controlling the tilting assembly frame 55. The internally threaded lifting seat 51 has an outwardly protruding internal toothed adjustment frame 511 located around the lateral mounting shaft 52. The rotation control assembly 54 engages with the internal toothed adjustment frame 511, causing the lateral rotating seat 53 to rotate and adjust along the lateral mounting shaft 52. The rotation control assembly 54 includes a drive shaft 541 passing through the lateral rotating seat 53, a drive gear 542 axially fixed to one end of the drive shaft 541, a drive worm gear 543 axially fixed to the other end of the drive shaft 541, and a drive worm 544 meshing with the drive worm gear 543. The drive gear 542 meshes with the internal gear adjusting frame 511. The drive worm 544 is driven to rotate by a micro motor, which in turn drives the drive worm gear 543 to rotate, thereby driving the drive shaft 541 and the drive gear 542. 2. Rotation drives the gear 542 to mesh with the internal gear adjustment frame 511, which in turn drives the lateral rotating seat 53 to rotate around the lateral assembly shaft 52, thereby achieving circumferential angle adjustment of the pressure and vibration sensing unit 8. The lateral control support rod 56 adopts an electrically controlled telescopic rod, and its telescopic end is hinged to the flip assembly frame 55. The flip angle of the flip assembly frame 55 can be adjusted by telescopic action, further adjusting the detection angle of the pressure and vibration sensing unit 8, ensuring that the external detection cover 73 is precisely fitted with the detection surface of the diesel generator set.

[0029] The electrically controlled tilting strut 6 is fixedly installed inside the tilting assembly frame 55. The electrically controlled tilting strut 6 adopts a multi-stage electrically controlled telescopic rod, which can flexibly extend and retract according to the detection distance requirements, driving the elastic connector 7 and the pressure and vibration sensing unit 8 to move closer to or away from the detection surface of the diesel generator set without manual adjustment, thus improving the convenience of operation.

[0030] The flexible connector 7 includes an external mounting bracket 71 fixedly fitted to the extended end of the electrically controlled tilting support rod 6, a lateral mounting spring 72 mounted on the external mounting bracket 71, and an external detection cover 73 mounted on the outer end of the lateral mounting spring 72. The lateral mounting spring 72 has a certain elastic extension and contraction. When the external detection cover 73 contacts the surface of the generator set, the lateral mounting spring 72 can buffer the contact impact force to avoid damage caused by hard contact between the pressure sensor 81 and the vibration sensor 82 and the surface of the generator set. At the same time, it can make the external detection cover 73 fit tightly against the surface of the generator set to ensure the accuracy of the detection data. The external detection cover 73 adopts an arc-shaped structure to adapt to the curved detection surface of the diesel generator set and improve the fit.

[0031] The pressure and vibration sensing unit 8 includes a pressure sensor 81 fixed on the outer arc-shaped contact surface of the outer detection cover 73 and a vibration sensor 82 fixed on the inner arc-shaped surface of the outer detection cover 73. The pressure sensor 81 detects the contact pressure between the outer detection cover 73 and the unit surface in real time and feeds the pressure data back to the control system. When the pressure does not reach the preset value, the control system controls the electrically controlled tilting support 6 to continue to extend and retract until the pressure reaches the standard, ensuring the detection fit. The vibration sensor 82 collects vibration data during unit operation in real time, including parameters such as vibration velocity and amplitude. The collected data is transmitted to the control system for analysis and processing to determine whether the unit balance and vibration status meet the standards.

[0032] Two symmetrically arranged position-adjustable optical positioning probes 11 are installed at the lower end of the top crossbeam of the main adjustment frame 3. The position-adjustable optical positioning probes 11 can be adjusted in position and angle by adjusting the bracket. After starting, they can accurately locate the outline and key detection positions of the diesel generator set and feed the positioning data back to the control system. The control system automatically adjusts the translation position of the main adjustment frame 3 and the height and angle of the height-controllable adjustment component 5 according to the positioning data to ensure that the pressure and vibration sensing unit 8 is accurately aligned with the detection point, avoid detection position deviation, and improve detection accuracy.

[0033] The working principle and process of this device are as follows: First, the diesel generator set is fixedly installed on the bottom mounting platform 1. The adjustable optical positioning probe 11 is started to position the diesel generator set, and the positioning data is transmitted to the control system. The adjustable optical positioning probe 11 at the top of the main adjustment frame 3 uses laser beam and contour scanning for positioning. The standard external dimensions of the diesel generator set and the coordinates of the preset detection points are pre-entered into the control system. During positioning, the optical positioning probe 11 emits a positioning beam to the surface of the unit, collects the contour of the unit and the position information of the detection points, compares and calibrates the real-time coordinates with the preset coordinates, and automatically corrects the translation position of the main adjustment frame 3 to ensure that the detection units on both sides are accurately aligned with the set detection points. After the positioning is completed, the translation base 9 is locked to keep the detection position fixed.

[0034] After positioning, the electrically controlled lifting screw 42 inside the embedded electrically controlled lifting guide rail 4 rotates, driving the internal thread lifting seat 51 to rise and fall along the embedded lifting guide rail 41, adjusting the height controllable adjustment component 5 to the set detection height to adapt to different detection surfaces of the unit; then the rotation adjustment component 54 is activated, driving the worm gear 544 to drive the drive worm wheel 543 to rotate, which is transmitted through the transmission shaft 541 and the drive gear 542. The drive gear 542 meshes with the internal gear adjustment frame 511, driving the lateral rotating seat 53 to rotate circumferentially around the lateral assembly shaft 52, adjusting the orientation of the electrically controlled flip support rod 6; at the same time, the lateral control support rod 56 extends and retracts, driving the flip assembly frame 55 to flip, finely adjusting the pitch angle of the electrically controlled flip support rod 6, so that the elastic connector 7 and the pressure and vibration sensing unit 8 are directly facing the detection position on the side wall of the unit.

[0035] After the angle and height are adjusted to the correct position, the electrically controlled tilting support rods 6 on both sides extend synchronously, pushing the elastic connector 7 to move towards the side wall of the diesel generator set until the external detection cover 73 contacts the surface of the unit. The lateral spring 72 is compressed under force, providing flexible extrusion force to avoid damage to the unit from hard contact. The pressure sensor 81 collects the extrusion pressure value in real time and transmits it to the control system. The control system compares the real-time pressure with the set balance detection pressure threshold to keep the extrusion pressure on both sides balanced and stable within the detection range.

[0036] Under flexible compression contact, on the one hand, the pressure difference collected by the pressure sensors 81 on both sides is used to judge the balance of the unit. The smaller the pressure deviation on both sides, the better the balance of the unit installation and operation. If the pressure deviation exceeds the standard, it is determined that the unit has balance defects such as eccentricity or tilt. On the other hand, the vibration sensor 82 is close to the surface of the unit and collects the vibration signal of the unit in real time during operation, capturing parameters such as vibration amplitude, frequency, and speed. Combined with the balance detection data, the vibration and balance status of the unit are comprehensively judged.

[0037] After completing the single-point test, the electrically controlled flipping support rod 6 retracts, the external test cover 73 detaches from the unit surface, the main adjustment frame 3 moves to the next test point via the bottom adjustment guide rail 2, the optical positioning probe 11 is repositioned and calibrated, and the height adjustment, angle adjustment, synchronous extrusion, pressure and vibration test process is repeated to realize multi-position and all-round automated testing of the unit without manual intervention.

[0038] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A balance and vibration testing device for diesel generator sets, comprising a bottom mounting platform (1) for mounting the diesel generator set and a bottom-mounted adjusting guide rail (2) located around the bottom mounting platform (1), characterized in that: The bottom-mounted adjustment guide rail (2) is movably mounted with a portal-shaped main adjustment frame (3). Embedded electrically controlled lifting guide rails (4) are fixedly mounted on both sides of the main adjustment frame (3). Height-controllable adjustment components (5) are movably mounted on both sides of the main adjustment frame (3) through the embedded electrically controlled lifting guide rails (4). Electrically controlled flipping support rods (6) are hinged on the height-controllable adjustment components (5). Pressure and vibration sensing units (8) are installed at the extended end of the electrically controlled flipping support rods (6) through elastic connectors (7).

2. The balancing and vibration testing device for diesel generator sets according to claim 1, characterized in that: The main adjustment frame (3) has a translation base (9) fixedly installed on both sides of the lower end, which cooperates with the bottom adjustment guide rail (2). The translation base (9) slides and moves along the bottom adjustment guide rail (2) by driving the adjustment wheel (10) on the bottom side.

3. The balancing and vibration testing device for diesel generator sets according to claim 1, characterized in that: The embedded electric lifting guide rail (4) includes an embedded lifting guide rail (41) fixed inside the two side walls of the main adjustment frame (3) and an electric lifting screw (42) installed inside the embedded lifting guide rail (41).

4. The balancing and vibration testing device for diesel generator sets according to claim 3, characterized in that: The height controllable adjustment assembly (5) includes an internal thread lifting seat (51) threaded onto an electrically controlled lifting screw (42), a lateral assembly shaft (52) fixed to the outside of the internal thread lifting seat (51), a lateral rotating seat (53) fitted onto the lateral assembly shaft (52), a rotation control assembly (54) mounted on the lateral rotating seat (53), a flip assembly frame (55) hinged to the lateral rotating seat (53), and a lateral control support rod (56) for controlling the flip assembly frame (55).

5. The balancing and vibration testing device for diesel generator sets according to claim 4, characterized in that: The internal thread lifting seat (51) has an outwardly protruding internal tooth adjustment frame (511) located around the side assembly shaft (52). The rotation control component (54) engages with the internal tooth adjustment frame (511) to drive the side rotation seat (53) to rotate and adjust along the side assembly shaft (52).

6. The balancing and vibration testing device for diesel generator sets according to claim 5, characterized in that: The rotation control assembly (54) includes a transmission shaft (541) passing through the lateral rotating seat (53), a drive gear (542) axially fixed at one end of the transmission shaft (541), a drive worm gear (543) axially fixed at the other end of the transmission shaft (541), and a drive worm (544) meshing with the drive worm gear (543). The drive gear (542) meshes with the internal gear adjusting frame (511).

7. The balancing and vibration testing device for diesel generator sets according to claim 4, characterized in that: The electrically controlled flip support rod (6) is fixedly installed inside the flip assembly frame (55).

8. The balancing and vibration testing device for diesel generator sets according to claim 1, characterized in that: The elastic connector (7) includes an external mounting bracket (71) fixedly fitted on the extended end of the electrically controlled flipping support (6), a lateral mounting spring (72) mounted on the external mounting bracket (71), and an external detection cover (73) mounted on the outer end of the lateral mounting spring (72).

9. The balancing and vibration testing device for diesel generator sets according to claim 8, characterized in that: The pressure and vibration sensing unit (8) includes a pressure sensor (81) fixed on the outer arc-shaped contact surface of the outer detection cover (73) and a vibration sensor (82) fixed on the inner arc-shaped surface of the outer detection cover (73).

10. The balancing and vibration testing device for diesel generator sets according to claim 1, characterized in that: Two symmetrically arranged position-adjustable optical positioning probes (11) are installed at the lower end of the top crossbeam of the main adjustment frame (3).

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