Roundness measuring device for water turbine rotor

Abstract

The utility model discloses a water turbine rotor roundness measuring device which comprises a V-shaped measuring frame, the V-shaped measuring frame comprises a first measuring rod, a second measuring rod, a connecting shaft, a movable measuring transverse ruler and a rotating measuring ruler, one end of the first measuring rod is rotatably connected with one end of the second measuring rod through the connecting shaft, and the other end of the second measuring rod is rotatably connected with the rotating measuring ruler. The movable measuring transverse ruler is arranged above the first measuring rod and the second measuring rod, the first measuring rod is provided with a first movable screw, one end of the first movable screw penetrates through the movable measuring transverse ruler and then is connected with the upper end face of the first measuring rod, and the second measuring rod is provided with a second movable screw. One end of the second movable screw penetrates through the movable measuring transverse ruler and then is connected with the upper end face of the second measuring rod, one end of the rotary measuring ruler is rotationally connected with the upper end face of the movable measuring transverse ruler, and pressure point sensing plates are arranged on the first measuring rod and the second measuring rod and fixedly connected with the first measuring rod and the second measuring rod respectively. The large-scale water turbine rotor roundness measuring device has the advantage that roundness of a large-scale water turbine rotor can be measured in multiple places.

Description

Technical Field

[0001] The utility model relates to the technical field related to water turbine component testing equipment, in particular to a water turbine rotor roundness measuring device. Background Art

[0002] The turbine rotor consists of a rotating shaft, bracket, yoke, magnetic poles, and current collector, and is used to generate a magnetic field, convert energy, and transmit torque. The roundness of the turbine rotor must meet requirements to effectively drive the turbine. However, the rotors of large turbines are generally large and heavy, making roundness measurement very difficult. Furthermore, even secondary measurements cannot be performed in a timely manner, limiting the scope of roundness measurement.

[0003] The Chinese patent publication number is CN204359252U, and the authorized publication date is May 27, 2015. A hydro-turbine generator rotor roundness measuring device is disclosed, comprising a counterweight (1) and a measuring arm assembly (3) with a dial indicator (2). The roundness measuring device also comprises a rotating shaft (4), on which a cylindrical bearing body (5) is provided. The counterweight (1) and the measuring arm assembly (3) are symmetrically arranged on the outer wall of the bearing body (5), and the lower end of the rotating shaft (4) is connected to the upper end face of the rotor main shaft (6) through a positioning device. The utility model has the advantages of simple structure and convenient use. It can be easily installed, making the rotation smoother and more accurate measurement. The disadvantage of the utility model is that it has a limitation on the location of roundness measurement of large hydro-turbine rotors. Utility Model Content

[0004] The utility model aims to overcome the disadvantage of the prior art that the roundness measurement locations of a large turbine rotor are limited, and provides a turbine rotor roundness measuring device that can measure the roundness of a large turbine rotor at multiple locations.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for measuring the roundness of a turbine rotor comprises a V-shaped measuring frame, wherein the V-shaped measuring frame comprises a measuring rod 1, a measuring rod 2, a connecting shaft, a movable measuring scale and a rotating measuring scale, wherein one end of the measuring rod 1 is rotatably connected to one end of the measuring rod 2 via the connecting shaft, and the movable measuring scale is placed above the measuring rods 1 and 2. The measuring rod 1 is provided with a movable screw 1, and one end of the movable screw 1 passes through the movable measuring scale and is connected to the upper end face of the measuring rod 1. The measuring rod 2 is provided with a movable screw 2, and one end of the movable screw 2 passes through the movable measuring scale and is connected to the upper end face of the measuring rod 2. One end of the rotating measuring scale is rotatably connected to the upper end face of the movable measuring scale. Pressure point sensor plates are provided on the opposite sides of the measuring rods 1 and 2, and the pressure point sensor plates are fixedly connected to the measuring rods 1 and 2 respectively.

[0007] When in use, open the measuring rod 1 and measuring rod 2 of the V-shaped measuring frame with the connecting shaft as the center, then let the outer side of the rotor rest against the pressure point sensor plate of measuring rod 1 and measuring rod 2, and then rotate the movable measuring ruler with movable screw 1 as the axis, so that the rotating movable measuring ruler is tangent to the outer circle of the rotor and then connected to movable screw 2, so that a size can be obtained. Then, in order to ensure the consistency of the roundness of the rotor, select several points where the measuring rod 1 and measuring rod 2 are tangent to the rotor and calculate again. The multiple contact point positions of the pressure point sensor plate can also be uploaded to the computer for more accurate calculation. The rotating measuring ruler is an accompanying component and can be used for other measurements. Such a simple measuring device can measure the roundness of the rotor in more places, and the position of the rotor will not be restricted, thereby achieving the purpose of measuring the roundness of large turbine rotors in multiple places.

[0008] Preferably, the connecting shaft is provided with a fixing nut, which is positioned below the first and second measuring rods and is threadedly connected to the lower end of the connecting shaft. The fixing nut can lock the first and second measuring rods, thereby facilitating the fixing of the first and second measuring rods at a constant angle.

[0009] Preferably, the first and second measuring rods are each provided with a sliding groove and a movable hexagonal nut. The sliding grooves are respectively located on the upper end surfaces of the first and second measuring rods and are connected to one end of the distal connecting shaft of the first and second measuring rods. The movable hexagonal nut is placed in the sliding groove. Both sides of the sliding groove are provided with cross bars, which are fixedly connected to the two side surfaces of the sliding groove. The cross bars are placed above the movable hexagonal nut. The movable hexagonal nut is engaged with the sliding groove via the cross bars. The first and second movable screws respectively pass through the movable measuring scale and the movable hexagonal nut and contact the bottom surface of the sliding groove. The movable hexagonal nut can move within the sliding groove to facilitate adjustment of the position of the movable measuring scale, and the cross bars can block the movable hexagonal nut.

[0010] Preferably, the first movable screw is provided with a retaining ring, which surrounds the outer surface of the first movable screw and is fixedly connected to the outer surface of the fixed screw. The upper end surface of the retaining ring contacts the lower end surface of the movable measuring scale. The movable measuring scale is provided with a through hole, through which the first and second movable screws respectively pass through the through hole and the movable hexagonal nut to contact the inner bottom surface of the sliding groove. The retaining ring can raise the height of the fixed movable measuring scale, and the through hole allows the position of the second movable screw to be adjusted.

[0011] Preferably, a rotating shaft is provided at one end of the rotating measuring scale, which passes through the end of the rotating measuring scale and contacts the upper end surface of the movable measuring scale. The rotating shaft facilitates calculation of the distance between the connecting shaft and the position where the outer ring of the rotating measuring scale's movable measuring rotor is tangent to the movable measuring scale.

[0012] Preferably, the upper end surfaces of the first and second measuring rods are both provided with scale marks, which correspond to the pressure point sensor plates. The scale marks facilitate intuitively viewing the size of the tangent position between the pressure point sensor plates and the outer circle of the rotor, facilitating calculations.

[0013] The beneficial effects of the utility model are: the roundness measurement of large turbine rotors can be carried out in multiple places; the fixing nut can lock the measuring rod one and the measuring rod two, so that the measuring rod one and the measuring rod two are conveniently fixed at an angle; the movable hexagonal nut can move in the sliding groove, so that the position of the movable measuring horizontal ruler can be conveniently adjusted, and the cross bar can block the movable hexagonal nut; the retaining ring can raise the height of the fixed movable measuring horizontal ruler, and the through hole allows the movable screw two to adjust the position; the rotating shaft can allow the rotating measuring ruler to move the distance between the position where the outer ring of the measuring rotor is tangent to the movable measuring horizontal ruler and the connecting shaft, which is convenient for calculation; the scale mark makes it convenient and intuitive to see the size of the position where the pressure point sensor plate is tangent to the outer circle of the rotor, which is convenient for calculation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 It is the main view of the utility model;

[0016] Figure 3 yes Figure 2 AA cross-section diagram;

[0017] Figure 4 yes Figure 2 Cross-sectional view of BB;

[0018] Figure 5 yes Figure 2 Cross-sectional view of CC.

[0019] In the figure: 1. Measuring rod 1, 2. Measuring rod 2, 3. Connecting shaft, 4. Fixing nut, 5. Movable measuring scale, 6. Rotating measuring scale, 7. Movable screw 1, 8. Movable screw 2, 9. Sliding slot, 10. Cross bar, 11. Movable hexagonal nut, 12. Retaining ring, 13. Through hole, 14. Rotating shaft, 15. Scale mark, 16. Pressure point sensor plate. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] like Figures 1 to 3 In an embodiment, a device for measuring the roundness of a turbine rotor is provided, which includes a V-shaped measuring frame, which includes a measuring rod 1, a measuring rod 2, a connecting shaft 3, a movable measuring scale 5 and a rotating measuring scale 6. One end of the measuring rod 1 is rotatably connected to one end of the measuring rod 2 through the connecting shaft 3. The movable measuring scale 5 is placed above the measuring rod 1 and the measuring rod 2. A movable screw 7 is provided on the measuring rod 1, and one end of the movable screw 7 passes through the movable measuring scale 5 and is connected to the upper end face of the measuring rod 1. A movable screw 28 is provided on the measuring rod 22, and one end of the movable screw 28 passes through the movable measuring scale 5 and is connected to the upper end face of the measuring rod 2. One end of the rotating measuring scale 6 is rotatably connected to the upper end face of the movable measuring scale 5. Pressure point sensor plates 16 are provided on the opposite sides of the measuring rod 1 and the measuring rod 2, and the pressure point sensor plates 16 are fixedly connected to the measuring rod 1 and the measuring rod 2, respectively.

[0022] like Figure 3 As shown, a fixing nut 4 is provided on the connecting shaft 3 , and the fixing nut 4 is placed below the measuring rod 1 and the measuring rod 2 2 , and the fixing nut 4 is threadedly connected to the lower end of the connecting shaft 3 .

[0023] like Figures 1 to 5 As shown, the measuring rod 1 and the measuring rod 2 are both provided with a sliding groove 9 and a movable hexagonal nut 11. The sliding grooves 9 are respectively placed on the upper end surfaces of the measuring rod 1 and the measuring rod 2 and are connected to one end of the remote connecting shaft 3 of the measuring rod 1 and the measuring rod 2. The movable hexagonal nut 11 is placed in the sliding groove 9. Both sides of the sliding groove 9 are provided with cross bars 10. The cross bars 10 are respectively fixedly connected to the two side surfaces of the sliding groove 9. The cross bars 10 are placed above the movable hexagonal nut 11. The movable hexagonal nut 11 is clamped with the sliding groove 9 through the cross bars 10. The movable screw 1 7 and the movable screw 2 8 respectively pass through the movable measuring horizontal ruler 5 and the movable hexagonal nut 11 and contact the inner bottom surface of the sliding groove 9.

[0024] like Figure 4As shown, a retaining ring 12 is provided on the movable screw 7. The retaining ring 12 surrounds the outer surface of the movable screw 7 and is fixedly connected to the outer side surface of the fixed screw. The upper end surface of the retaining ring 12 contacts the lower end surface of the movable measuring horizontal ruler 5. A through hole 13 is provided on the movable measuring horizontal ruler 5. The movable screw 1 7 and the movable screw 2 8 respectively pass through the through hole 13 and the movable hexagonal nut 11 and contact the inner bottom surface of the sliding groove 9.

[0025] like Figure 1 、 Figure 2 、 Figure 3 and Figure 5 As shown, a rotating shaft 14 is provided on one end of the rotating measuring ruler 6 , and the rotating shaft 14 passes through one end of the rotating measuring ruler 6 and contacts the upper end surface of the movable measuring horizontal ruler 5 .

[0026] like Figure 1 and Figure 2 As shown, the upper end surfaces of the measuring rod 1 1 and the upper end surfaces of the measuring rod 2 2 are both provided with scale marks 15 , and the scale marks 15 correspond to the pressure point sensor plates 16 .

[0027] When in use, open the measuring rod 1 and measuring rod 2 of the V-shaped measuring frame with the connecting shaft 3 as the center, then let the outer side of the rotor press against the pressure point sensor plate 16 of the measuring rod 1 and measuring rod 2, and then use the fixing nut 4 to fix the angle between the measuring rod 1 and measuring rod 2, and then insert the movable hexagonal nut 11 on the movable screw 17 between the sliding groove 9 and the crossbar 10, and rotate the movable measuring horizontal ruler 5 with the movable screw 17 as the axis, so that the rotating movable measuring horizontal ruler 5 is tangent to the outer circle of the rotor, and then use the movable screw 2 8 to pass through the through hole 13 and connect and fix it with the movable hexagonal nut 11 in the measuring rod 2, and the retaining ring 12 on the movable screw 17 can make the movable measuring horizontal ruler 5 have a stable At a certain height, the rotating shaft 14 can make the rotating measuring ruler 6 movable and measure the distance between the position where the outer ring of the rotor is tangent to the movable measuring horizontal ruler 5 and the connecting shaft 3, so as to calculate a roundness dimension. Then, in order to ensure the consistency of the roundness of the rotor, the positions where the measuring rod 1 and the measuring rod 2 are tangent to the rotor are selected for several more points and calculated again. The contact point positions of the pressure point sensor plate 16 multiple times can also be uploaded to the computer, and the calculation is more accurate. The rotating measuring ruler, as an accompanying component, can also be used for other measurements. Such a simple measuring device can measure the roundness of the rotor in more places, and the position where the rotor is placed will not be restricted, thereby achieving the purpose of measuring the roundness of large turbine rotors in multiple places.

Claims

1. A device for measuring the roundness of a turbine rotor, characterized in that: The V-shaped measuring frame comprises a measuring rod 1 (1), a measuring rod 2 (2), a connecting shaft (3), a movable measuring ruler (5) and a rotating measuring ruler (6), one end of the measuring rod 1 (1) is rotatably connected to one end of the measuring rod 2 (2) through the connecting shaft (3), the movable measuring ruler (5) is placed above the measuring rod 1 (1) and the measuring rod 2 (2), and a movable screw 1 (7) is provided on the measuring rod 1 (1), one end of the movable screw 1 (7) passes through the movable measuring ruler (5) and is connected to the measuring rod 2 (2). The measuring rod 1 (1) is connected to the upper end face of the measuring rod 2 (2), and a movable screw 2 (8) is provided on the measuring rod 2 (2). One end of the movable screw 2 (8) passes through the movable measuring horizontal ruler (5) and is connected to the upper end face of the measuring rod 2 (2). One end of the rotating measuring ruler (6) is rotatably connected to the upper end face of the movable measuring horizontal ruler (5). Pressure point sensor plates (16) are provided on the opposite sides of the measuring rod 1 (1) and the measuring rod 2 (2), and the pressure point sensor plates (16) are fixedly connected to the measuring rod 1 (1) and the measuring rod 2 (2) respectively.

2. A turbine rotor roundness measuring device according to claim 1, characterized in that: The connecting shaft (3) is provided with a fixing nut (4), the fixing nut (4) is placed below the measuring rod 1 (1) and the measuring rod 2 (2), and the fixing nut (4) is threadedly connected to the lower end of the connecting shaft (3).

3. The device for measuring the roundness of a turbine rotor according to claim 1, wherein: The measuring rod 1 (1) and the measuring rod 2 (2) are both provided with a sliding groove (9) and a movable hexagonal nut (11), the sliding groove (9) is respectively placed on the upper end surface of the measuring rod 1 (1) and the measuring rod 2 (2) and is connected to one end of the distal connecting shaft (3) of the measuring rod 1 (1) and the measuring rod 2 (2), the movable hexagonal nut (11) is placed in the sliding groove (9), both sides of the sliding groove (9) are provided with a cross piece (10), the cross piece (10) is respectively fixedly connected to the two side surfaces of the sliding groove (9), the cross piece (10) is placed above the movable hexagonal nut (11), the movable hexagonal nut (11) is clamped with the sliding groove (9) through the cross piece (10), and the movable screw 1 (7) and the movable screw 2 (8) respectively pass through the movable measuring horizontal ruler (5) and the movable hexagonal nut (11) and then contact the inner bottom surface of the sliding groove (9).

4. A device for measuring the roundness of a turbine rotor according to claim 3, characterized in that: The movable screw 1 (7) is provided with a retaining ring (12), which surrounds the outer side of the movable screw 1 (7) and is fixedly connected to the outer side of the fixed screw. The upper end face of the retaining ring (12) contacts the lower end face of the movable measuring ruler (5), and the movable measuring ruler (5) is provided with a through hole (13). The movable screw 1 (7) and the movable screw 2 (8) respectively pass through the through hole (13) and the movable hexagonal nut (11) and contact the inner bottom surface of the sliding groove (9).

5. The device for measuring the roundness of a turbine rotor according to claim 1, wherein: A rotating shaft (14) is provided on one end of the rotating measuring ruler (6), and the rotating shaft (14) passes through one end of the rotating measuring ruler (6) and contacts the upper end surface of the movable measuring horizontal ruler (5).

6. The device for measuring the roundness of a turbine rotor according to claim 1, wherein: The upper end surfaces of the measuring rod 1 (1) and the measuring rod 2 (2) are both provided with scale marks (15), and the scale marks (15) correspond to the pressure point sensing plates (16).

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