Efficient centering detection device suitable for high-power diesel engine shaft system

Abstract

The utility model provides an efficient centering detection device suitable for a high-power diesel engine shaft system, and belongs to the technical field of diesel engine installation. Comprising a diesel engine shaft system output end connecting support, a connecting shaft, a meter frame connecting support and a generator shaft input end face measuring meter support. A diesel engine shaft system output end connecting support is coaxially and fixedly connected with an output flange of a diesel engine, the center of the diesel engine shaft system output end connecting support is connected with a connecting shaft in a locking mode, and the connecting shaft is coaxially connected with a meter frame connecting support in a locking mode. The four generator shaft input end face measuring meter supports are circumferentially and evenly distributed, locked and fixed to the meter frame connecting support, and each motor shaft input end face measuring meter support is provided with a radial measuring dial indicator and an angular measuring dial indicator. According to the device, centering result numbers can be conveniently read in real time only by turning and rotating a shaft system of the diesel engine once, so that the centering process has real-time feedback, the occurrence of a centering adjustment error process is reduced, the centering workload is reduced, the centering efficiency is improved, and the reliability of the diesel engine is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of diesel engine installation, and specifically relates to a high-efficiency centering detection device suitable for the shaft system of a high-power diesel engine. Background Technology

[0002] At present, when a high-power diesel engine with a capacity of more than 1000kW is connected to a generator, the generator and the diesel engine must first be aligned, and only after the alignment is completed can they be connected by bolts. When aligning, the position of the diesel engine is generally fixed first, and then two dial indicators are added to the output end of the diesel engine, one for measuring the angular deviation of the shaft system, and the other for measuring the radial deviation of the shaft system; the diesel engine is turned once, and then the values ​​of the dial indicators are measured and recorded at the four positions of the shaft system, namely, the upper, lower, left, and right, to calculate the deviation, and the position of the generator is adjusted according to the deviation, thereby changing the state of its shaft system and reducing the alignment deviation with the diesel engine shaft system; each time the generator shaft system state is adjusted once, the diesel engine needs to be turned once, and the deviation data of the above two dial indicators at the four positions of the shaft system, namely, the upper, lower, left, and right, are recorded, and compared with the required value through calculation. If the requirements are not met, the generator shaft system position is adjusted again, and the diesel engine is turned, the data is recorded, the deviation value is calculated and compared with the required value, and so on and so forth until the alignment requirements are met.

[0003] The above process is a 3-DOF adjustment process, and the adjustment of different positions and directions has different effects on the adjustment results. It is necessary to measure the centering deviation results manually, formulate an adjustment plan based on the results, verify the correctness of the plan, and gradually reduce the deviation to complete the centering process. From the above process, it can be seen that the centering adjustment requires a high level of manual experience. If the adjustment experience is relatively lacking or the person is tired after working for a long time, it is easy to make the adjustment plan wrong. In addition, due to the large weight of the generator, each adjustment time is long. After the adjustment, it is necessary to re-turn the centering check to find the problem of the adjustment plan. Therefore, it is often because the centering cannot timely find out whether the trend of the adjustment result meets the expectation, whether the adjustment is in place or overshoot has occurred, etc., which makes the centering process longer and the centering efficiency is low, affecting the production and maintenance progress. At the same time, for large diesel engines that have been parked for a long time, the lubricating oil on each friction pair is very little or has no lubrication function due to the long storage time. If the engine is turned repeatedly during the alignment process to check the alignment data, it will be detrimental to the working reliability of each friction pair of the diesel engine, and it is easy to wear the working surfaces of the crankshaft bearing, camshaft and rocker bearing, tappet ball head and other precision contact surfaces.

[0004] In summary, for the alignment of the shafting of high-power diesel engines, generally two dial indicators are installed and the diesel engine is turned by hand to measure the axial deviation and radial deviation values of the shafting, and then the deviation of the shafting is measured. Then, the deviation result is judged manually and an adjustment plan is formulated to adjust the shafting. After that, the axial deviation and radial deviation values of the alignment are detected again. This cycle is repeated to complete the alignment of the shafting. Since this method cannot display the alignment result in real time, the alignment work efficiency is low, the alignment process has relatively high requirements for the experience of workers, and for units that have been out of use for a long time, dry friction is likely to occur due to the lack of lubricating oil in each friction pair, which will damage the friction mating surface.

[0005] Therefore, in view of the above problems, it is necessary to design an efficient alignment detection device suitable for the shafting of high-power diesel engines. Utility Model Content

[0006] The technical problem solved by the utility model: Provide an efficient alignment detection device suitable for the shafting of high-power diesel engines. The purpose of the utility model is to design an efficient alignment detection device suitable for the shafting of high-power diesel engines in order to meet the requirements of efficient alignment, reduce the workload in the alignment process, and reduce the dependence on manual experience in the alignment process. It can monitor and display the alignment result in real time, which is convenient for the alignment personnel to view the alignment result in real time, judge the alignment data in real time, avoid rework problems such as incorrect adjustment, insufficient adjustment, and over-adjustment, and improve the alignment efficiency.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is:

[0008] An efficient alignment detection device suitable for the shafting of high-power diesel engines includes a connecting bracket at the output end of the diesel engine shafting, a connecting shaft, a connecting bracket for the dial indicator frame, and a measuring dial indicator bracket on the input end face of the generator shaft.

[0009] The connecting bracket at the output end of the diesel engine shafting is coaxially and fixedly connected to the output flange of the diesel engine. The center of the connecting bracket at the output end of the diesel engine shafting is locked and connected to the connecting shaft. A connecting bracket for the dial indicator frame is coaxially locked and connected to the connecting shaft. There are four measuring dial indicator brackets on the input end face of the generator shaft, which are circumferentially and evenly distributed and locked and fixed on the connecting bracket for the dial indicator frame. Each measuring dial indicator bracket on the input end face of the generator shaft is provided with a radial measuring dial indicator and an angular measuring dial indicator.

[0010] Among them, the edge of the connecting bracket at the output end of the diesel engine shafting is provided with bolt holes for corresponding connection with the connection holes on the output flange of the diesel engine. The center of the connecting bracket at the output end of the diesel engine shafting is provided with a connection hole for adapting to the connection with the connecting shaft. A locking screw Ⅰ for locking the connecting shaft is provided in the middle of the connecting bracket at the output end of the diesel engine shafting.

[0011] Further, a plurality of locking screws I are evenly distributed around the circumference of the middle part of the connecting bracket at the output end of the diesel engine shafting. The axis of the locking screw I is perpendicular to the axis of the connecting bracket at the output end of the diesel engine shafting. The connecting bracket at the output end of the diesel engine shafting is provided with a threaded hole for screwing with the locking screw I, and the threaded hole is vertically communicated with the connecting hole.

[0012] Further, the fitting precision of the connecting shaft and the connecting hole is H8 / h7.

[0013] Among them, the table frame connecting bracket includes a connecting sleeve. An installation hole for fitting with the connecting shaft is provided at the center of the connecting sleeve. The connecting sleeve is provided with a locking screw II for locking the connecting shaft. Four connecting arms are evenly distributed around the circumference of the outer circle of the connecting sleeve. The connecting arms are perpendicular to the axis of the connecting sleeve. The four connecting arms are fixedly connected to the four generator shaft input end measuring table brackets in a one-to-one correspondence.

[0014] Further, a plurality of locking screws II are evenly distributed around the circumference of the connecting sleeve. The axis of the locking screw II is perpendicular to the axis of the connecting sleeve. The connecting sleeve is provided with a threaded hole for screwing with the locking screw II, and the threaded hole is vertically communicated with the installation hole.

[0015] Further, the fitting precision of the connecting shaft and the installation hole is H8 / h7.

[0016] Further, each generator shaft input end measuring table bracket is an F-shaped bracket. The upper horizontal bar of the F shape of the generator shaft input end measuring table bracket is fixedly connected to the corresponding connecting arm through a locking screw III. A kidney-shaped hole for the locking screw III to pass through is provided on the connecting arm. A radial measuring dial indicator is fixed to the lower part of the vertical bar of the F shape of the generator shaft input end measuring table bracket through a dial indicator locking nut. An angular measuring dial indicator is fixed to the inner horizontal bar of the F shape of the generator shaft input end measuring table bracket through a dial indicator locking nut.

[0017] Advantages of the present utility model compared with the prior art:

[0018] 1. This solution forms an alignment detection device that can display the alignment deviation result in real time through the connecting bracket at the output end of the diesel engine shafting, the connecting shaft, the table frame connecting bracket, and the generator shaft input end measuring table bracket. During the alignment connection process between the diesel engine and the generator, after the dial indicator is set up, only need to turn the diesel engine shafting once by turning the crank, then the alignment result number can be conveniently read in real time, so that there is real-time feedback during the alignment process, reducing the occurrence of misalignment adjustment errors; during the alignment adjustment process, there is no need to frequently turn the crank to check the alignment result, reducing the alignment workload, improving the alignment efficiency, and at the same time reducing the accident risk of dry friction without oil for each friction pair of the diesel engine, improving the reliability of the diesel engine;

[0019] 2. The solution of the present invention is simple in composition and convenient to assemble. By calibrating the reference values of 8 dial indicators in one rotation during the first use, the requirements for installation and the manufacturing precision of the device are reduced, and the alignment parameters can be accurately measured, which is convenient for operation and improves the alignment efficiency.

[0020] 3. The solution of the present invention is a set of real-time alignment data inspection device developed without changing the output flange of the diesel engine and the input flange surface of the generator. It can accurately display real-time data, improve the alignment efficiency, reduce the requirements for manpower in alignment, and effectively reduce the wear and scratch risks of each friction pair surface of the diesel engine during barring. This device is not only applicable to the measurement of alignment data between the diesel engine and the generator, but also applicable to the measurement of alignment data between the diesel engine and equipment such as pump sets, propulsion shafts, and gearboxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural view of the present invention in the use state;

[0022] Figure 2 is a front view of the structure of the connection bracket at the output end of the diesel engine shafting in the present invention;

[0023] Figure 3 For the present invention Figure 2 is a sectional view of the structure in the A-A direction;

[0024] Figure 4 For the present invention Figure 2 is a sectional view of the structure in the B-B direction;

[0025] Figure 5 is a front view of the structure of the connecting shaft in the present invention;

[0026] Figure 6 is a front view of the structure of the table frame connection bracket in the present invention;

[0027] Figure 7 For the present invention Figure 6 is a sectional view of the structure in the C-C direction;

[0028] Figure 8 For the present invention Figure 6 is a sectional view of the structure in the D-D direction;

[0029] Figure 9 is a front view of the structure of the measuring table bracket at the input end face of the generator shaft in the present invention;

[0030] Figure 10 For the present invention Figure 9 is a sectional view of the structure in the E-E direction. DETAILED DESCRIPTION OF THE INVENTION

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the phrase "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0033] Please refer to Figure 1-10 , and the embodiments of the present utility model will be described in detail.

[0034] Embodiment: An efficient alignment detection device applicable to the shafting of a high-power diesel engine. Refer to Figure 1 and 5 As shown, it includes a connecting bracket 1 at the output end of the diesel engine shafting, a connecting shaft 2, a connecting bracket for the meter frame 3, and a measuring meter bracket 4 on the input end face of the generator shaft;

[0035] The connecting bracket 1 at the output end of the diesel engine shafting is coaxially and fixedly connected to the output flange of the diesel engine. The center of the connecting bracket 1 at the output end of the diesel engine shafting is locked and connected to the connecting shaft 2. A connecting bracket 3 for the meter frame is coaxially locked and connected to the connecting shaft 2. There are four measuring meter brackets 4 on the input end face of the generator shaft and they are circumferentially and evenly distributed and locked and fixed on the connecting bracket 3 for the meter frame. Each measuring meter bracket 4 on the input end face of the generator shaft is provided with a radial measuring dial indicator 4-1 and an angular measuring dial indicator 4-3.

[0036] In a specific embodiment: Refer to Figures 2-4 As shown, the edge of the connecting bracket 1 at the output end of the diesel engine shafting is provided with bolt holes 1-1 for corresponding connection with the connection holes on the output flange of the diesel engine. The center of the connecting bracket 1 at the output end of the diesel engine shafting is provided with a connection hole 1-2 for adapting to connect with the connecting shaft 2. The middle part of the connecting bracket 1 at the output end of the diesel engine shafting is provided with a locking screw Ⅰ 1-3 for locking the connecting shaft 2.

[0037] Preferably, 4 locking screws I (1-3) are evenly distributed around the circumference of the middle part of the connecting bracket 1 at the output end of the diesel engine shafting. The axes of the locking screws I (1-3) are perpendicular to the axis of the connecting bracket 1 at the output end of the diesel engine shafting. The connecting bracket 1 at the output end of the diesel engine shafting is provided with screw holes for screwing with the locking screws I (1-3), and the screw holes are vertically communicated with the connecting holes (1-2).

[0038] Preferably, the fitting accuracy of the connecting shaft 2 and the connecting hole (1-2) is H8 / h7.

[0039] In a specific embodiment: Refer to Figures 6-8 As shown, the meter frame connecting bracket 3 includes a connecting sleeve (3-1). The center of the connecting sleeve (3-1) is provided with a mounting hole (3-3) for fitting with the connecting shaft 2. The connecting sleeve (3-1) is provided with locking screws II (3-2) for locking the connecting shaft 2. Four connecting arms (3-4) are evenly distributed around the outer circumference of the connecting sleeve (3-1). The connecting arms (3-4) are perpendicular to the axis of the connecting sleeve (3-1). The ends of the connecting arms (3-4) are fixedly welded to the outer circumferential surface of the connecting sleeve (3-1). The four connecting arms (3-4) are fixedly connected to the four generator shaft input end measuring meter brackets 4 in a one-to-one correspondence.

[0040] Preferably, 4 locking screws II (3-2) are evenly distributed around the circumference of the connecting sleeve (3-1). The axes of the locking screws II (3-2) are perpendicular to the axis of the connecting sleeve (3-1). The connecting sleeve (3-1) is provided with screw holes for screwing with the locking screws II (3-2), and the screw holes are vertically communicated with the mounting hole (3-3).

[0041] Preferably, the fitting accuracy of the connecting shaft 2 and the mounting hole (3-3) is H8 / h7.

[0042] In a specific embodiment: Refer to Figures 9-10 As shown, each generator shaft input end measuring meter bracket 4 is an F-shaped bracket. The upper horizontal bar of the F shape of the generator shaft input end measuring meter bracket 4 is fixedly connected to the corresponding connecting arm (3-4) through a locking screw III (4-2). The connecting arm (3-4) is provided with waist-shaped holes for the locking screw III (4-2) to pass through, which is convenient for the installation and adjustment of the generator shaft input end measuring meter bracket 4. The lower part of the vertical bar of the F shape of the generator shaft input end measuring meter bracket 4 is fixed with a radial measuring dial indicator (4-1) through a dial indicator locking nut (4-4). The inner horizontal bar of the F shape of the generator shaft input end measuring meter bracket 4 is fixed with an angular measuring dial indicator (4-3) through a dial indicator locking nut (4-4).

[0043] When this device is in use:

[0044] The connecting bracket 1 at the output end of the diesel engine shafting is connected to the output flange box of the diesel engine through the bolt hole 1-1. The connecting hole 1-2 of the connecting bracket 1 at the output end of the diesel engine shafting is connected to the connecting shaft 2 and locked and fixed by the locking screw I 1-3. The meter frame connecting bracket 3 is connected to the connecting shaft 2 and locked and fixed by the locking screw II 3-2. The connecting arm 3-4 of the meter frame connecting bracket 3 is fitted and connected to the measuring meter bracket 4 on the input end face of the generator shaft and locked and fixed by the locking screw III 4-2. The radial measuring dial indicator 4-1 and the angular measuring dial indicator 4-3 are respectively fixed on the measuring meter bracket 4 on the input end face of the generator shaft by the dial indicator locking nuts 4-4.

[0045] During the alignment process, first, the connecting bracket 1 at the output end of the diesel engine shafting is fixedly installed on the output flange end face of the diesel engine, with the connecting hole 1-2 facing the generator side for connection and installation. Then, the connecting shaft 2 is inserted. The meter frame connecting bracket 3 is installed on the connecting shaft 2. Four sets of measuring meter brackets 4 on the input end face of the generator shaft are respectively installed on the meter frame connecting bracket 3, and the positions of the measuring meter brackets 4 on the input end face of the generator shaft, the meter frame connecting bracket 3, and the connecting shaft 2 are adjusted so that the readings of the dial indicators are all at the position of their middle range (for example, for a meter with a range of 10 mm, ensure that the readings of each meter are about 5 mm during the installation process). Then, the locking screw I 1-3, the locking screw II 3-2, and the dial indicator locking nut 4-4 are respectively fixed. At this time, the installation of the alignment detection device is completed.

[0046] Since the generator and the diesel engine are generally installed on a common base, and the common base has been drilled during design, after the generator is aligned with the holes and seated, the deviation of the centering parameters in the three spatial directions between the generator and the diesel engine is generally within 5 mm. Therefore, after this centering measurement device is set up, it is only necessary to turn the diesel engine one full turn. Taking the measurement values of a set of angular and radial dial indicators arbitrarily installed on the measuring table bracket at the input end face of the generator shaft as the reference values, record their measurement values at other different positions respectively. After turning one full turn, compare the display values of the indicators at the other three corresponding positions with the reference values, and calculate the difference between the two. During the subsequent adjustment process, by reading the real-time data of the eight dial indicators and subtracting the corresponding difference from the display value, the real dial indicator readings at different positions can be obtained. For example, taking the reading of the indicator corresponding to directly above the shafting as the reference value for calculation, when turning the diesel engine, the readings of the radial dial indicators of this set at the upper, right, lower, and left positions are R1, R2, R3, and R4 respectively, and the readings of the angular dial indicators are W1, W2, W3, and W4 respectively. When the indicator corresponding to directly above the shafting returns to its original position after turning one full turn, the readings of the radial dial indicators at the upper, right, lower, and left four positions are L1, L2, L3, and L4 respectively, and the readings of the angular dial indicators are T1, T2, T3, and T4 respectively. If the real-time readings of the radial dial indicators during the generator centering process are P1, P2, P3, and P4 respectively, and the real-time readings of the angular dial indicators are Q1, Q2, Q3, and Q4 respectively, then their real-time true values are P1-(R1-L1), P2-(R2-L2), P3-(R3-L3), P4-(R4-L4), and Q1-(T1-W1), Q2-(T2-W2), Q3-(T3-W3), Q4-(T4-W4). The calculation process is shown in Table 1. Since the adjustment amount during the centering process is very small, the adjustment error of this method is very small, not exceeding 0.1 mm, meeting the centering accuracy requirements of the generator set (the centering requirements for the MAN16V32 / 40 generator set: radial deviation ≤ 0.5 mm, angular deviation ≤ 0.5 mm).

[0047] The dial indicators in this embodiment are Bluetooth-displayed dial indicators. Equipped with a display (a commodity that can be directly purchased), it can directly display the readings of eight indicators, and the data can be viewed in real time during the adjustment process.

[0048]

[0049] Table 1. Calculation Table of Centering Real-Time Data

[0050] In summary, on the basis of not changing the output flange of the diesel engine and the input flange surface of the generator, the present device forms an alignment detection device that can display the alignment deviation result in real time through the connection bracket at the output end of the diesel engine shafting, the connecting shaft, the connecting bracket of the meter frame, and the measuring meter bracket for the input end face of the generator shaft. During the alignment connection process between the diesel engine and the generator, after the dial indicator is installed, only need to turn the diesel engine shafting once by hand, then the alignment result number can be conveniently read in real time, enabling real-time feedback during the alignment process and reducing the occurrence of incorrect alignment adjustment processes; during the alignment adjustment process, there is no need to frequently turn the shaft by hand to check the alignment result, reducing the alignment workload, improving the alignment efficiency, and at the same time reducing the accident risk of dry friction without oil for each friction pair of the diesel engine, and improving the reliability of the diesel engine.

[0051] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0052] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An efficient centering detection device suitable for high-power diesel engine shafting, characterized by: It comprises a diesel engine shaft system output end connecting bracket (1), a connecting shaft (2), a meter frame connecting bracket (3), and a generator shaft input end face measuring meter bracket (4); The diesel engine shaft output end connection bracket (1) is coaxially fixedly connected to the output flange of the diesel engine, the center of the diesel engine shaft output end connection bracket (1) is locked and connected to the connecting shaft (2), the connecting shaft (2) is coaxially locked and connected to a meter frame connection bracket (3), four generator shaft input end face measurement meter brackets (4) are provided and locked and fixed to the meter frame connection bracket (3) evenly distributed around the circumference, and each generator shaft input end face measurement meter bracket (4) is provided with a radial measurement dial gauge (4-1) and an angular measurement dial gauge (4-3).

2. The high-efficiency centering detection device for a high-power diesel engine shaft system according to claim 1 is characterized in that: The diesel engine shaft output end connection bracket (1) is provided with a bolt hole (1-1) on its edge, the bolt hole (1-1) being used to be connected to a connection hole on an output flange of the diesel engine, the diesel engine shaft output end connection bracket (1) is provided with a connection hole (1-2) in its center for being adapted to be connected to a connection shaft (2), and the diesel engine shaft output end connection bracket (1) is provided with a locking screw I (1-3) in the middle for locking the connection shaft (2).

3. The high-efficiency centering detection device for a high-power diesel engine shaft system according to claim 2 is characterized in that: A plurality of locking screws I (1-3) are evenly distributed on the circumference of the middle part of the diesel engine shaft system output end connecting bracket (1), the axis of the locking screw I (1-3) is perpendicular to the axis of the diesel engine shaft system output end connecting bracket (1), and the diesel engine shaft system output end connecting bracket (1) is provided with a screw hole for screwing with the locking screw I (1-3), and the screw hole is vertically connected to the connecting hole (1-2).

4. The high-efficiency centering detection device for a high-power diesel engine shaft system according to claim 2 is characterized in that: The matching accuracy between the connecting shaft (2) and the connecting hole (1-2) is H8 / h7.

5. The high-efficiency centering detection device for a high-power diesel engine shaft system according to claim 1 is characterized in that: The meter frame connecting bracket (3) comprises a connecting sleeve (3-1), a mounting hole (3-3) for cooperating with a connecting shaft (2) is provided at the center of the connecting sleeve (3-1), a locking screw II (3-2) for locking the connecting shaft (2) is provided on the connecting sleeve (3-1), four connecting arms (3-4) are evenly distributed on the circumference of the outer circle of the connecting sleeve (3-1), the connecting arms (3-4) are perpendicular to the axis of the connecting sleeve (3-1), and the four connecting arms (3-4) are fixedly connected to four generator shaft input end face measuring meter brackets (4) in a one-to-one correspondence.

6. The high-efficiency centering detection device for a high-power diesel engine shaft system according to claim 5 is characterized in that: A plurality of locking screws II (3-2) are evenly distributed on the circumference of the connecting sleeve (3-1), the axis of the locking screw II (3-2) is perpendicular to the axis of the connecting sleeve (3-1), and the connecting sleeve (3-1) is provided with a screw hole for screwing with the locking screw II (3-2), and the screw hole is vertically connected to the mounting hole (3-3).

7. The high-efficiency centering detection device for a high-power diesel engine shaft system according to claim 5 is characterized in that: The matching accuracy between the connecting shaft (2) and the mounting hole (3-3) is H8 / h7.

8. The high-efficiency centering detection device for a high-power diesel engine shaft system according to claim 5 is characterized in that: Each generator shaft input end face measuring gauge bracket (4) is an F-type bracket, the F-type upper crossbar of the generator shaft input end face measuring gauge bracket (4) is fixedly connected to the corresponding connecting arm (3-4) via a locking screw III (4-2), the connecting arm (3-4) is provided with a waist-shaped hole for the locking screw III (4-2) to pass through, a radial measuring dial gauge (4-1) is fixed to the lower part of the F-type vertical bar of the generator shaft input end face measuring gauge bracket (4) via a dial gauge locking nut (4-4), and an angular measuring dial gauge (4-3) is fixed to the F-type inner crossbar of the generator shaft input end face measuring gauge bracket (4) via a dial gauge locking nut (4-4).

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