Device for measuring concentricity of ultra-large mixed flow rotor and main shaft

Abstract

The utility model provides a concentricity measuring device for an ultra-large mixed flow rotor and a main shaft, and belongs to the field of coupling of main shafts and rotating wheels of water turbines. The objective of the utility model is to solve the problem of inaccurate measurement result caused by human factors in the concentricity measurement process of the main shaft and the rotating wheel. The device comprises an upper rotating disc, a radial adjusting device, a water turbine main shaft, a stand column, a measuring arm, a measuring rod, a rotating wheel, a lower rotating disc and a horizontal walking mechanism. The water turbine main shaft is fixed with the runner; the upper turntable is connected with the lower turntable through a stand column; the lower plane of the right end part of the measuring arm is connected with a measuring rod; the upper turntable upper plane and the lower turntable lower plane are provided with radial adjusting devices, and the lower turntable upper plane is provided with a horizontal walking mechanism. The device can realize accurate measurement of coupling data of the main shaft and the rotating wheel of the water turbine, avoids inaccurate measurement results caused by human factors, greatly reduces the labor intensity of workers, and improves the working efficiency of coupling of the main shaft and the rotating wheel.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of water turbine main shaft and runner coupling, especially to a super large mixed flow runner and main shaft concentricity measuring device. BACKGROUND

[0002] The necessary procedure of super large mixed flow runner installation on the construction site is to couple the water turbine main shaft and runner, so as to adjust the concentricity of the whole rotating part. If the concentricity does not meet the standard requirement, the unit will produce large swing during operation, and in serious cases, the runner will collide with the fixed part, causing serious accidents. Therefore, the concentricity of the water turbine main shaft and runner is directly related to the hydraulic performance of the whole hydro-generator unit and the installation quality. At present, the method of measuring the concentricity of the water turbine main shaft and runner on the construction site or in the factory is mostly to install a support on the upper end of the water turbine main shaft for steel wire measurement. This method is simple in structure and convenient to operate, but there are many human factors, and the measurement personnel need to have high measurement skills, which greatly restricts the quality and efficiency of the coupling.

[0003] In view of the above shortcomings and problems, it is urgent to design a super large mixed flow runner and main shaft concentricity measuring device to solve the problem of inaccurate measurement results caused by human factors in the process of measuring the concentricity of the main shaft and runner, so as to improve the quality and working efficiency of the coupling. SUMMARY

[0004] In the following, a brief summary of the utility model is given to provide a basic understanding of some aspects of the utility model. It should be understood that this summary is not an exhaustive summary of the utility model. It is not intended to determine the key or important parts of the utility model, nor is it intended to limit the scope of the utility model. Its purpose is only to give some concepts in a simplified form as a prelude to the more detailed description discussed later.

[0005] In view of this, in order to solve the problem of inaccurate measurement results caused by human factors in the process of measuring the concentricity of the main shaft and runner, the utility model provides a super large mixed flow runner and main shaft concentricity measuring device.

[0006] The utility model technical scheme is a super large mixed flow runner and main shaft concentricity measuring device, which comprises an upper turntable, a radial adjusting device, a water turbine main shaft, a stand, a measuring arm, a measuring rod, a runner, a coupling bolt, a lower turntable and a horizontal walking mechanism.

[0007] The water turbine main shaft is fixed with the runner through the coupling bolt, the upper turntable and the lower turntable are coaxial with the water turbine main shaft, and the upper turntable and the lower turntable are fixedly connected through a plurality of stands.

[0008] The right side stand is locked with the left end of the measuring arm by bolts, and the lower plane of the right end of the measuring arm is fixedly connected with a measuring rod;

[0009] The upper plane of the upper disc and the lower plane of the lower disc are both provided with four groups of radial adjusting devices distributed at 90 degrees, and the upper plane of the lower disc is fixedly provided with four groups of horizontal walking mechanisms distributed at 90 degrees by bolts;

[0010] The radial adjusting device comprises a connecting piece and a bearing fixing piece, the connecting piece is fixed outside the upper plane of the upper disc and the lower plane of the lower disc and opens outward, the bearing fixing piece is installed inside the upper plane of the upper disc and the lower plane of the lower disc, the inner side surface of the bearing is in contact with the positioning surface of the water guide bearing of the main shaft of the water turbine, and the connecting piece and the bearing fixing piece are connected by bolts;

[0011] The horizontal walking mechanism comprises a connecting piece and a bearing fixing piece, the connecting piece is fixed to the inner side vertical surface of the upper plane of the lower disc and is provided with an opening upward and flush with the upper plane of the lower disc, and the bearing fixing piece is installed to the inner side vertical surface of the lower disc and the inner side surface of the bearing is in contact with the flange plane of the main shaft of the water turbine and the runner;

[0012] The end of the measuring rod is adsorbed with a dial gauge, and the dial gauge needle is perpendicular to the lower ring surface of the runner.

[0013] Further, the lower disc is a split structure.

[0014] Further, the stand is provided with four groups of 90-degree distribution.

[0015] Further, the right end of the counterweight arm is locked with the left stand by bolts.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The device can realize accurate measurement of the shafting data of the main shaft of the water turbine and the runner, and avoid inaccurate measurement results caused by human factors.

[0018] 2. The device has simple structure and convenient operation, and the measurement of the shafting data of the main shaft and the runner can be completed by only rotating the measuring rod.

[0019] 3. The device can realize continuous measurement of the lower ring surface of the runner when the main shaft of the water turbine and the runner are coupled, and more intuitively reflect the deviation of the shafting.

[0020] 4. The device is simple to install and debug, can greatly reduce the labor intensity of workers, and improve the working efficiency of the shafting of the main shaft and the runner. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their description serve to explain the present application. They do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 It is a structural schematic view of a large-scale Francis runner concentricity measuring device;

[0023] Figure 2 It is Figure 1 the sectional view of D-D;

[0024] Figure 3 It is Figure 1 the sectional view of E-E;

[0025] Figure 4 It is Figure 1 the partial enlarged view of the radial adjusting device at F.

[0026] In the drawings: 1 - upper turntable, 2 - radial adjusting device, 3 - water turbine main shaft, 4 - stand column, 5 - measuring arm, 6 - measuring rod, 7 - runner, 8 - coupling bolt, 9 - lower turntable, 10 - horizontal walking mechanism, 11 - counterweight arm, 12 - connecting piece, 13 - bearing fixing piece. DETAILED DESCRIPTION

[0027] In order to make the technical solutions and advantages of the embodiments of the present application clearer and more apparent, the exemplary embodiments of the present application are further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0028] Embodiment 1, refer to Figures 1-4 The present embodiment is a large-scale Francis runner concentricity measuring device, which comprises an upper turntable 1, a radial adjusting device 2, a water turbine main shaft 3, a stand column 4, a measuring arm 5, a measuring rod 6, a runner 7, a coupling bolt 8, a lower turntable 9 and a horizontal walking mechanism 10.

[0029] The water turbine main shaft 3 is fixed with the runner 7 through the coupling bolt 8, the upper turntable 1 and the lower turntable 9 are coaxial with the water turbine main shaft 3, and the upper turntable 1 and the lower turntable 9 are fixedly connected through a plurality of stand columns 4;

[0030] The right stand column 4 is locked with the left end of the measuring arm 5 through a bolt, and the right end of the measuring arm 5 is fixedly connected with the measuring rod 6 through a lower plane;

[0031] The upper disc 1 upper surface and the lower disc 9 lower surface are provided with four groups of radial adjusting devices 2 distributed at 90 degrees, and the lower disc 9 upper surface is fixed with four groups of horizontal walking mechanisms 10 distributed at 90 degrees through bolts;

[0032] The radial adjusting device 2 comprises a connecting piece 12 and a bearing fixing piece 13, the connecting piece 12 is fixed outside the upper disc 1 upper surface and the lower disc 9 lower surface, and the opening faces outward; the bearing fixing piece 13 is installed inside the upper disc 1 upper surface and the lower disc 9 lower surface, the inner side surface of the bearing is in contact with the water guide bearing positioning surface of the water turbine main shaft 3; the connecting piece 12 and the bearing fixing piece 13 are connected through bolts;

[0033] The horizontal walking mechanism 10 comprises a connecting piece 12 and a bearing fixing piece 13, the connecting piece 12 is fixed inside the lower disc upper surface vertical surface, and the opening faces upward and is flush with the lower disc 9 upper surface, the bearing fixing piece 13 is installed inside the lower disc 9 vertical surface, and the inner side surface of the bearing is in contact with the flange plane of the water turbine main shaft 3 and the runner 7;

[0034] The end of the measuring rod 6 is adsorbed with a dial gauge, the dial gauge needle is perpendicular and in contact with the lower ring surface of the runner 7.

[0035] Further, the lower disc 9 is a split structure.

[0036] Further, the stand 4 is provided with four groups of 90-degree distribution.

[0037] Further, the counterweight arm 11 right end is locked with the left stand 4 through bolts.

[0038] Further, the concentricity of the super-large mixed flow runner and the main shaft is measured through the device, and the specific method is as follows:

[0039] S1. the water turbine main shaft 3 and the runner 7 are preliminarily tightened through the shaft coupling bolts 8 and placed on the shaft coupling station;

[0040] S2. start installing the lower disc 9, tighten the horizontal walking mechanism 10 on the lower disc 9 upper surface inside through bolts, so that the horizontal walking mechanism 10 is in contact with the flange plane of the water turbine main shaft 3 and the runner 7; install the radial adjusting device 2 at the corresponding lower surface position of the lower disc 9, and there are four groups in total;

[0041] S3. adjust the radial adjusting device 2 to be in contact with the flange vertical surface of the water turbine main shaft 3 and the runner 7, and take the water turbine main shaft 3 axis positioning C reference;

[0042] S4. install four groups of stands 4, which are distributed at 90 degrees, and the lower surface of the stand 4 is connected with the upper surface of the lower disc 9 through bolts, and the upper surface of the stand 4 is connected with the lower surface of the upper disc 1 through bolts;

[0043] S5. Start installing the upper turntable 1, install four groups of radial adjustment devices 2 on the upper turntable 1, and make the radial adjustment devices 2 contact with the positioning surface of the water guide bearing of the water turbine main shaft 3 through adjusting bolts, so as to serve as the A reference for positioning the axis of the water turbine main shaft 3;

[0044] S6. Install the measuring arm 5, the measuring rod 6 and the counterweight arm 11, and fasten the left end of the measuring arm 5 with the column 4 through bolts, fasten the right end of the measuring arm 5 with the lower plane of the measuring rod 6 through bolts, and fasten the right end of the counterweight arm 11 with the column 4 through bolts;

[0045] S7. Suck the dial indicator on the end of the measuring rod 6, make the dial indicator needle vertical and contact with the lower ring surface of the runner 7;

[0046] S8. Rotate the measuring rod 6 manually, observe the reading of the dial indicator and record;

[0047] S9. According to the recorded reading of the dial indicator, adjust the pre-tightening force of the coupling bolt 8 until the concentricity meets the installation requirements.

[0048] In the whole measuring and adjusting process of the coupling of the water turbine main shaft and the runner, the upper turntable and the lower turntable use the positioning section of the water guide bearing of the water turbine main shaft and the flange plane vertical surface fastened with the runner as the concentric reference of the coupling, so as to ensure the coupling accuracy of the water turbine main shaft and the runner, and the unique positioning structure enables the whole device to rotate in the circumferential direction manually, the device is simple to operate, the measuring error caused by repeated manual measurement through the steel wire is avoided, and the labor intensity of workers is greatly reduced.

[0049] Although the utility model has been described in accordance with a limited number of embodiments, those skilled in the art, with the benefit of the above description, will appreciate that other embodiments can be conceived within the scope of the utility model thus described. Furthermore, it should be noted that the language used in the specification is mainly selected for readability and instructional purposes and is not selected for purposes of interpretation or definition of the subject matter of the utility model. Therefore, many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. The disclosure of the utility model is illustrative rather than restrictive, and the scope of the utility model is defined by the appended claims.

Claims

1. A device for measuring the concentricity of a very large Francis runner with the main shaft, characterized in that, It comprises an upper turntable (1), radial adjusting devices (2), a water turbine main shaft (3), columns (4), a measuring arm (5), a measuring rod (6), a runner (7), coupling bolts (8), a lower turntable (9) and horizontal walking mechanisms (10). The water turbine main shaft (3) is fixed with the runner (7) through the coupling bolts (8), the upper turntable (1) and the lower turntable (9) are coaxial with the water turbine main shaft (3), and the upper turntable (1) and the lower turntable (9) are fixedly connected through the columns (4). The right column (4) is locked with the left end of the measuring arm (5) through bolts, and the right end of the measuring arm (5) is fixedly connected with the measuring rod (6). The upper surface of the upper turntable (1) and the lower surface of the lower turntable (9) are provided with four groups of radial adjusting devices (2) distributed at 90 degrees, and the upper surface of the lower turntable (9) is fixed with four groups of horizontal walking mechanisms (10) distributed at 90 degrees through bolts. The radial adjusting device (2) comprises a connecting piece (12) and a bearing fixing piece (13), the connecting piece (12) is fixed outside the upper surface of the upper turntable (1) and the lower surface of the lower turntable (9) with the opening facing outward, and the bearing fixing piece (13) is installed inside the upper surface of the upper turntable (1) and the lower surface of the lower turntable (9), the inner side surface of the bearing is in contact with the water guide bearing positioning surface of the water turbine main shaft (3); the connecting piece (12) and the bearing fixing piece (13) are connected through bolts. The horizontal walking mechanism (10) comprises a connecting piece (12) and a bearing fixing piece (13), the connecting piece (12) is fixed to the inner side vertical surface of the upper surface of the lower turntable, the opening is upward and flush with the upper surface of the lower turntable (9), and the bearing fixing piece (13) is installed on the inner side vertical surface of the lower turntable (9), and the inner side surface of the bearing is in contact with the flange plane of the water turbine main shaft (3) and the runner (7). The end of the measuring rod (6) is adsorbed with a dial gauge, and the dial gauge needle is perpendicular to the lower ring surface of the runner (7).

2. A device for measuring the concentricity of a large hydrodynamic runner with a main shaft according to claim 1, characterized in that, The lower turntable (9) is a split structure.

3. A device for measuring the concentricity of a large hydrodynamic runner with respect to a main shaft according to claim 1, characterized in that, The column (4) is provided with four groups of 90-degree uniform distribution.

4. A device for measuring the concentricity of a large hydrodynamic runner with respect to a main shaft according to claim 3, characterized in that, The right end of the counterweight arm (11) is locked with the left column (4) through bolts.

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