Test tool for synchronous generator of mining dump truck

Abstract

The utility model discloses a test tool for a synchronous generator of a mining dump truck, which belongs to the technical field of synchronous generators and comprises a dummy shaft, one end of the dummy shaft is connected with a mother machine through a belt, and the other end of the dummy shaft is connected with a rotor in the synchronous generator. An end cover is arranged at one end of the synchronous generator, the dummy shaft penetrates through the end cover to be connected with a connecting disc, the connecting disc is connected with a rotor connecting structure, the rotor connecting structure is connected with an output shaft, and a rotor is arranged on the output shaft. According to the utility model, the tool dummy shaft, the connecting disc, the rotor connecting structure and the self-made generator end cover are arranged and combined into a whole to be connected to the synchronous generator, so that the generator can freely rotate in a static state, and the tool dummy shaft and the generator rotor are independently connected to carry out a rotor dynamic balance test; the stability of the dynamic balance performance of the rotor is ensured, the electrical integrity test of the whole machine is carried out, the accuracy and convenience of motor fault detection are improved, and time and labor wasting of on-board actual measurement is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of synchronous generators, and in particular relates to a testing tool for a synchronous generator of a mining dump truck. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] Mining dump trucks are essential transportation tools in large open-pit mines and are widely used across various industries. The generator, the "heart" of a mining dump truck, directly impacts the overall performance of the vehicle. Existing synchronous generators in mining dump trucks are coupled to large diesel engines. The diesel engine drives the generator to generate AC power, which is then rectified into DC power to power two DC motors. As the core of the entire mining dump truck, performance testing of the synchronous generator is crucial.

[0004] In the existing technology, the performance of the synchronous generator is mainly judged by installing it on a mining dump truck and observing its power generation. Rework often occurs, which greatly increases the labor intensity of on-site personnel and also greatly reduces the equipment dispatch rate.

[0005] If the generator rotor has poor dynamic balancing performance, it will produce obvious vibration and displacement during rotation, which will greatly reduce the safety and service life of the generator. Therefore, it is necessary to perform a rotor dynamic balancing test on the synchronous generator of the mining dump truck. When ensuring that the rotor has good dynamic balancing performance, the generator is further subjected to a whole-machine electrical integrity test.

[0006] Since the synchronous generator structure of this type of mining dump truck is relatively special, with a single-sided output shaft and single-sided bearing structure, and the synchronous generator of the mining dump truck is relatively large, it is impossible to perform a rotor dynamic balance test on it through the single-sided output shaft using the existing dynamic balancing machine during the maintenance process. In other words, there is a lack of tooling and methods for performing a dynamic balance test on the rotor of the synchronous generator. If the synchronous generator cannot ensure good dynamic balance, it is also impossible to perform an electrical integrity test of the entire machine to judge its performance. Utility Model Content

[0007] The purpose of the utility model is to provide a test fixture for a synchronous generator of a mining dump truck. By arranging a fixture dummy shaft, a connecting plate, a rotor connecting structure, a self-made generator end cover and combining the above structures into a whole, the utility model is connected to the synchronous generator, so that the generator can rotate freely in a static state, and the fixture dummy shaft is separately connected to the generator rotor to perform a rotor dynamic balance test, while ensuring the stability of the rotor dynamic balance performance, the electrical integrity test of the whole machine is performed, the accuracy and convenience of motor fault detection are improved, and the time-consuming and labor-intensive actual measurement on the vehicle is avoided.

[0008] In order to achieve the above purpose, the present invention is implemented through the following technical solutions:

[0009] In a first aspect, an embodiment of the present invention provides a test fixture for a synchronous generator of a mining dump truck, comprising a dummy shaft, one end of which is connected to a mother machine via a belt, and the other end of which is connected to a rotor inside the synchronous generator;

[0010] An end cover is provided at one end of the synchronous generator, the dummy shaft passes through the end cover and is connected to a connecting disk, the connecting disk is connected to a rotor connecting structure, the rotor connecting structure is connected to an output shaft, and a rotor is provided on the output shaft.

[0011] As a further technical solution, one end of the output shaft away from the rotor connection structure extends through the synchronous generator housing, and a bearing is provided at the connection between the output shaft and the synchronous generator housing.

[0012] As a further technical solution, the end cover is connected to an end of the synchronous generator housing that extends out of the synchronous generator housing away from the output shaft.

[0013] As a further technical solution, a sealing structure is provided at the connection between the end cover and the synchronous generator housing.

[0014] As a further technical solution, observation holes are provided on the side walls of the end cover and the top plate connected to the dummy shaft.

[0015] As a further technical solution, the axes of the dummy shaft, the connecting disc, and the output shaft are the same straight line.

[0016] As a further technical solution, a connecting bearing is provided at the connection between the dummy shaft and the end cover.

[0017] As a further technical solution, the dummy shaft is fixedly connected to the connecting disk, and the connecting disk is detachably connected to the rotor connecting structure.

[0018] As a further technical solution, the connecting plate and the rotor connecting structure are connected by bolts.

[0019] As a further technical solution, the rotor connection structure includes a disc structure and a protrusion structure, the disc structure is connected to the output shaft, and the protrusion structure is connected to the connection disc.

[0020] The beneficial effects of the above embodiments of the present invention are as follows:

[0021] The utility model provides a tooling dummy shaft, a connecting plate, a rotor connecting structure, a self-made generator end cover, and combines the above structures into a whole, which is connected to a synchronous generator, so that the generator can rotate freely in a static state, and the tooling dummy shaft is separately connected to the generator rotor to perform a rotor dynamic balancing test, so that the electrical integrity test of the whole machine can be performed while ensuring the stability of the rotor dynamic balancing performance, thereby improving the accuracy and convenience of motor fault detection and avoiding the time and effort of on-vehicle actual testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0023] Figure 1 This is a schematic diagram of a dynamic balance test of a synchronous generator for a mining dump truck provided by Example 1 of the present utility model;

[0024] Figure 2 This is a schematic diagram of an end cover structure provided by Example 1 of the present utility model;

[0025] Figure 3 This is a structural diagram of a dummy shaft and a connecting disc provided in Example 1 of the present utility model;

[0026] Figure 4 This is a schematic diagram of the internal structure of a synchronous generator provided in Example 1 of the present utility model.

[0027] The diagram is for illustrative purposes only;

[0028] Among them, 1. Mother machine; 2. Belt; 3. Connecting bearing; 4. Observation hole; 5. Connecting plate; 6. Rotor connecting structure; 7. Rotor; 8. Output shaft; 9. Dummy shaft; 10. End cover; 11. End cover shaft hole; 12. Synchronous generator housing; 13. Sealing structure. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0030] Example 1

[0031] In a typical embodiment of the present invention, Figure 1As shown, a test fixture for synchronous generators used in mining dump trucks is provided, comprising a dummy shaft 9, one end of which is connected to the main machine 1 via a belt 2, and the other end of which is connected to the rotor 7 inside the synchronous generator. In this embodiment, a connecting sleeve is provided on the exterior of the dummy shaft 9, with two connecting grooves along its circumference. The two connecting grooves connect two parallel belts 2, the other ends of which are connected to the main machine 1. This structure ensures transmission stability.

[0032] One end of the synchronous generator is equipped with an end cap 10. A dummy shaft 9 passes through this end cap and connects to a connection plate 5. The connection plate 5 is connected to a rotor connection structure 6, which is connected to an output shaft 8, on which a rotor 7 is mounted. This arrangement, in which the dummy shaft 9 is independently connected to the generator rotor 7, further facilitates dynamic balancing testing of the rotor 7. While ensuring the stability of the rotor 7's dynamic balancing performance, it also allows for testing the electrical integrity of the entire machine, thereby improving the accuracy and convenience of motor fault detection.

[0033] The end of the output shaft 8 away from the rotor connection structure 6 extends through the synchronous generator housing 12, and a bearing is provided at the connection between the output shaft 8 and the synchronous generator housing 12. The end cover 10 is connected to the synchronous generator housing 12 and extends out of the synchronous generator housing 12 away from the output shaft 8. A sealing structure 13 is provided at the connection between the end cover 10 and the synchronous generator housing 12.

[0034] In this embodiment, the end cap 10 is a custom-made structure that can be removably attached to the synchronous generator, protecting the dummy shaft 9 and the generator interior during testing. During generator testing, the end cap 10, dummy shaft 9, connecting plate 5, and connecting structure are installed at the end of the generator that extends out of the synchronous generator housing 12, away from the output shaft 8. After the test is complete, the end cap 10 is removed and the original generator structure is installed for on-board operation. This allows the entire generator test to be completed not only through on-board testing, but also facilitates testing.

[0035] The end cap 10 is cylindrical in structure, with no base plate on the side connected to the synchronous generator. Instead, an annular connection structure is provided where the end cap 10 connects to the synchronous generator. This connection structure features a circular protrusion facing the generator. This protrusion abuts against the sealing structure 13 and further against the synchronous generator housing 12, further ensuring the generator's sealing. The sealing structure utilizes an annular rubber strip for sealing.

[0036] An observation hole 4 is provided on the side wall of the end cover 10 and the top plate connected to the dummy shaft 9 for observing the rotation of the dummy shaft 9 during the test.

[0037] The axes of the dummy shaft 9, the connecting disc 5 and the output shaft 8 are collinear, so that the rotation of the dummy shaft 9 is better transmitted to the rotor 7 through the connecting disc 5 and the output shaft 8, and the dynamic balance performance of the rotor 7 is ensured.

[0038] The connecting bearing 3 is arranged at the connection between the dummy shaft 9 and the end cover 10.

[0039] The dummy shaft 9 is fixedly connected with the connecting disc 5, and the connecting disc 5 is detachably connected with the rotor connecting structure 6.

[0040] The rotor connecting structure 6 comprises a disc structure and a protruding structure, the disc structure is connected with the output shaft 8, and the protruding structure is connected with the connecting disc 5.

[0041] In the embodiment, the dynamic balance experiment of the rotor can be performed by assembling the tooling dummy shaft, the connecting disc, the rotor connecting structure, the self-made generator end cover and the synchronous generator.

[0042] The above only describes the preferred embodiments of the present application and is not used to limit the present application. The present application can be variously changed and modified for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A mining dump truck synchronous generator test fixture, characterized in that: It includes a dummy shaft, one end of which is connected to the mother machine through a belt, and the other end of which is connected to the rotor inside the synchronous generator; An end cover is provided at one end of the synchronous generator, the dummy shaft passes through the end cover and is connected to a connecting disk, the connecting disk is connected to a rotor connecting structure, the rotor connecting structure is connected to an output shaft, and a rotor is provided on the output shaft.

2. A mining dump truck synchronous generator test fixture as claimed in claim 1, characterized in that: One end of the output shaft away from the rotor connection structure extends through the synchronous generator housing, and a bearing is provided at the connection between the output shaft and the synchronous generator housing.

3. A mining dump truck synchronous generator test fixture as claimed in claim 1, characterized in that: The end cover is connected to the synchronous generator housing and extends out of the synchronous generator housing away from the output shaft.

4. A mining dump truck synchronous generator test fixture as claimed in claim 1, characterized in that: A sealing structure is provided at the connection between the end cover and the synchronous generator housing.

5. A mining dump truck synchronous generator test fixture as claimed in claim 4, characterized in that: Observation holes are provided on the side wall of the end cover and the top plate connected to the dummy shaft.

6. A mining dump truck synchronous generator test fixture as claimed in claim 1, characterized in that: The axes of the dummy shaft, the connecting plate and the output shaft are the same straight line.

7. The synchronous generator test fixture for a mining dump truck according to claim 1, characterized in that: A connecting bearing is provided at the connection between the dummy shaft and the end cover.

8. The synchronous generator test fixture for a mining dump truck according to claim 1, characterized in that: The dummy shaft is fixedly connected to the connecting disk, and the connecting disk is detachably connected to the rotor connecting structure.

9. A mining dump truck synchronous generator test fixture as claimed in claim 8, characterized in that: The connecting plate and the rotor connecting structure are connected by bolts.

10. The mining dump truck synchronous generator test fixture according to claim 1, characterized in that: The rotor connection structure includes a disc structure and a protrusion structure, wherein the disc structure is connected to the output shaft, and the protrusion structure is connected to the connection disc.

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