Device for measuring air gap between stator and rotor of water-turbine generator set

Abstract

The utility model provides a stator and rotor air gap measuring device for a water-turbine generator set, which comprises a first measuring block and a second measuring block, and a relatively sliding inclined plane is arranged between the first measuring block and the second measuring block. The sides, deviating from the relative sliding slopes, of the first measuring block and the second measuring block are provided with abutting surfaces used for abutting against a measured component in parallel, the first measuring block and the second measuring block are provided with a first measuring rod and a second measuring rod along the ends parallel to the abutting surfaces, and the first measuring rod and the second measuring rod are arranged in parallel. The first measuring rod is provided with a fixing rod, the fixing rod is provided with a dial indicator, and the second measuring rod is provided with a blocking piece for abutting against the detection end of the dial indicator. According to the utility model, the structure is simple, the practicability is strong, the measurement time can be reduced in the measurement process, the measurement accuracy is increased, and the measurement error is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to water turbine generator overhauling engineering technical field especially relates to a water turbine generator set stator rotor air gap measuring device. BACKGROUND

[0002] Stator rotor air gap measurement value is the important basis of water turbine generator set axis center adjustment, if the gap is uneven, can produce electromagnetic unbalance force, increase unit vibration and swing, aggravate bearing wear, serious even influence unit safe and stable operation.

[0003] The present power plant adopts the measuring tool for the wedge plug gauge of self -made, does not have the special stator rotor air gap measuring tool, and the wedge plug gauge of self -made has the non -uniformity of scale, is not accurate, is rough in manufacture, leads to the error when measuring. Therefore it is necessary to develop a kind of water turbine generator set stator rotor air gap measuring device. UTILITY MODEL CONTENTS

[0004] The utility model aims at at least one of the technical problems in the related art is solved to some extent.

[0005] To reach the above-mentioned purpose, the utility model provides a kind of water turbine generator set stator rotor air gap measuring device, including first measuring block and second measuring block, relative sliding inclined plane is arranged between the first measuring block with the second measuring block, the first measuring block with the second measuring block are parallelly arranged with the abutting face for abutting the measured component on the side of deviating relative sliding inclined plane, the first measuring block with the second measuring block are provided with first measuring rod and second measuring rod along the abutting face one end parallel, the first measuring rod with the second measuring rod is parallelly arranged, fixed rod is provided on the first measuring rod, dial gauge is provided on the fixed rod, the blocking piece that the dial gauge detection end abuts is provided on the second measuring rod.

[0006] The utility model sets up the first measuring block and the second measuring block that can slide along relative sliding inclined plane, and the first relative moving distance between the first measuring block and the second measuring block along the length direction of second measuring rod is detected by dial gauge, and the tangent value of the inclined angle of relative sliding inclined plane can be obtained, the second relative moving distance of the first measuring block and the second measuring block along the direction perpendicular to second measuring rod can be obtained by calculating the tangent value of the inclined angle and moving distance, and the measured interval is equal to the second relative moving distance+the width sum of the first measuring block and the second measuring block.

[0007] Optionally, the first measuring block with the second measuring block shape setting is same, and the first measuring block with the second measuring block is all set as right trapezoidal body, and the long bottom side face of the first measuring block with the short bottom side face of the second measuring block is arranged in the same direction.

[0008] In some embodiments, the long bottom side of the first measuring block is twice the length of the short bottom side.

[0009] In some embodiments, the dial gauge measuring end is arranged parallel to the first measuring rod or the second measuring rod, and the blocking piece is arranged perpendicular to the dial gauge measuring end.

[0010] In some embodiments, the dial gauge measuring end is arranged towards an end away from the second measuring block, and the blocking piece is arranged at an end of the dial gauge away from the second measuring block.

[0011] In some embodiments, a through slot is arranged on the second measuring rod below the blocking piece, the through slot is arranged for the fixed rod to pass through, and the fixed rod is fixedly connected to the dial gauge at one end of the second measuring rod.

[0012] In some embodiments, the blocking piece is arranged as a rod body, and the blocking piece is arranged perpendicular to the second measuring rod.

[0013] In some embodiments, a sliding rail and a sliding block are arranged in cooperation between the relative sliding inclined surface of the first measuring block and the relative sliding inclined surface of the second measuring block, and the sliding rail and the sliding block are slidingly connected.

[0014] In some embodiments, the abutting surface is arranged to adapt to the profile of the measured object.

[0015] The additional aspects and advantages of the present application will be partially given in the following description, some will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0017] Figure 1 is a front view schematic diagram of the overall structure of the water-turbine-generator-set stator-rotor air-gap measuring device according to the present application;

[0018] Figure 2 is an embodiment detection process schematic diagram of the water-turbine-generator-set stator-rotor air-gap measuring device according to the present application;

[0019] Figure 3 is a sliding rail and sliding block structure schematic diagram of the water-turbine-generator-set stator-rotor air-gap measuring device according to the present application;

[0020] Figure 4 is a second measuring rod structure schematic diagram of the water-turbine-generator-set stator-rotor air-gap measuring device according to the present application.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. First measuring block; 11. Slide rail; 12. Slider; 2. Second measuring block; 3. First measuring rod; 4. Second measuring rod; 41. Through groove; 5. Fixed rod; 6. Dial indicator; 7. Blocking component; 8. Relative moving inclined plane; 9. Abutment surface. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0024] This utility model provides a device for measuring the air gap between the stator and rotor of a hydro-generator set, as described below. Figures 1 to 3 To elaborate in detail.

[0025] A device for measuring the air gap between the stator and rotor of a hydro-generator set includes a first measuring block 1 and a second measuring block 2. A relative sliding inclined surface is provided between the first measuring block 1 and the second measuring block 2. Both the first measuring block 1 and the second measuring block 2 have abutment surfaces 9 arranged parallel to each other on the side away from the relative sliding inclined surface for abutting the measured component. A first measuring rod 3 and a second measuring rod 4 are provided along one end of the first measuring block 1 and the second measuring block 2 parallel to the abutment surface 9. The first measuring rod 3 and the second measuring rod 4 are arranged parallel to each other. A fixing rod 5 is provided on the first measuring rod 3. A dial indicator 6 is provided on the fixing rod 5. A blocking member 7 is provided on the second measuring rod 4 for the detection end of the dial indicator 6 to abut.

[0026] This invention features a first measuring block 1 and a second measuring block 2 that can slide relative to each other along a relative sliding inclined plane. A dial indicator 6 is used to detect the first relative movement distance between the first measuring block 1 and the second measuring block 2 along the length direction of the second measuring rod 4. The tangent value of the inclined plane angle can be obtained. By calculating the tangent value of the inclined plane angle and the movement distance, the second relative movement distance of the first measuring block 1 and the second measuring block 2 along the direction perpendicular to the second measuring rod 4 can be obtained. The measured distance is equal to the second relative movement distance plus the sum of the widths of the first measuring block 1 and the second measuring block 2.

[0027] In some embodiments, the first measuring block 1 and the second measuring block 2 have the same shape, and both the first measuring block 1 and the second measuring block 2 are set as right-angled trapezoids, and the long base surface of the first measuring block 1 and the short base surface of the second measuring block 2 are arranged in the same direction.

[0028] Let the length of the short base of each measuring block be *a*, the length of the long base be *b*, the length of the contact surface 9 be *c*, the distance between the stator and rotor being measured be *d*, the relative sliding slope angle be *α*, the first relative movement distance between the first measuring block 1 and the second measuring block 2 along the length of the second measuring rod 4 be *h*, the second relative movement distance between the first measuring block 1 and the second measuring block 2 along the direction perpendicular to the second measuring rod 4 be *x*, and the distance between the stator and rotor being measured be *d*. Then the following relationship holds:

[0029] ;

[0030] ;

[0031] ;

[0032] Then it can be deduced that .

[0033] In some embodiments, the length of the long base face of the first measuring block 1 is twice the length of the short base face. Setting the lengths of the long and short base faces as multiples facilitates the calculation process.

[0034] In some embodiments, to ensure the measurement accuracy of the dial indicator 6 during the testing process, it is necessary to ensure that the first measuring rod 3 is perpendicular to the end face of the first measuring block 1, the second measuring rod 4 is perpendicular to the end face of the second measuring block 2, and the first measuring rod 3 and the second measuring rod 4 are arranged in parallel. Furthermore, the measuring end of the dial indicator 6 is arranged parallel to either the first measuring rod 3 or the second measuring rod 4, and the blocking member 7 is arranged perpendicular to the measuring end of the dial indicator 6. This ensures that a certain distance is generated between the first measuring block 1 and the second measuring block 2. Figure 2 When the height difference is shown in the direction indicated, dial indicator 6 can accurately measure the height difference.

[0035] In some embodiments, to facilitate the movement of the dial indicator 6 following the second measuring block 2, the measuring end of the dial indicator 6 is positioned towards the end opposite to the second measuring block 2, and the blocking member 7 is positioned at the end of the dial indicator 6 away from the second measuring block 2. When the second measuring block 2 moves, the dial indicator 6 moves with the second moving block, and the blocking member 7 does not obstruct the movement direction of the dial indicator 6, further ensuring the feasibility of the measurement.

[0036] In some embodiments, a through groove 41 is provided on the rod body of the second measuring rod 4 located below the blocking member 7. The through groove 41 allows the fixing rod 5 to pass through, and the fixing rod 5 is fixedly connected to the dial indicator 6 at one end passing through the second measuring rod 4. The through groove 41 allows the first measuring rod 3 and the second measuring rod 4 to be on the same plane, thereby further ensuring that the blocking member 7, the dial indicator 6, the first measuring rod 3, and the second measuring rod 4 are all on the same plane. The through groove 41 also limits the degree of freedom of the fixing rod 5, further ensuring the detection accuracy of the dial indicator 6 during movement.

[0037] In some embodiments, the stop 7 is configured as a rod, and the stop 7 is arranged perpendicularly to the second measuring rod 4. The rod configuration can reduce manufacturing costs, and the width of the side surface of the rod that contacts the dial indicator 6 is at least sufficient to meet the width of the measuring tip of the dial indicator 6.

[0038] In some embodiments, a slide rail 11 and a slider 12 are provided between the relative sliding inclined surfaces of the first measuring block 1 and the second measuring block 2, and the slide rail 11 and the slider 12 are slidably connected. The arrangement of the slide rail 11 and the slider 12 can restrict the degrees of freedom of the first measuring block 1 and the second measuring block 2, ensuring that when the first measuring block 1 and the second measuring block 2 are placed between the stator and the rotor, the first measuring block 1 and the second measuring block 2 can only move relative to each other along the direction of the slide rail 11 and the slide groove.

[0039] In some embodiments, in order to ensure the accuracy of the measured distance, the contact surface 9 is adapted to the contour of the measured object between the measured object and the rotor with different contours.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A device for measuring the air gap between the stator and rotor of a hydro-generator set, characterized in that, The device includes a first measuring block and a second measuring block. A relative sliding slope is provided between the first measuring block and the second measuring block. Both the first measuring block and the second measuring block have abutment surfaces arranged parallel to each other on the side away from the relative sliding slope for abutting the measured component. A first measuring rod and a second measuring rod are provided on the first measuring block and the second measuring block along one end parallel to the abutment surface. The first measuring rod and the second measuring rod are arranged parallel to each other. A fixing rod is provided on the first measuring rod, and a dial indicator is provided on the fixing rod. A blocking member is provided on the second measuring rod for the measuring end of the dial indicator to abut.

2. The device for measuring the air gap between the stator and rotor of a hydro-generator set as described in claim 1, characterized in that, The first measuring block and the second measuring block have the same shape, and both the first measuring block and the second measuring block are set as right-angled trapezoids, with the long base surface of the first measuring block and the short base surface of the second measuring block arranged in the same direction.

3. The device for measuring the air gap between the stator and rotor of a hydro-generator set as described in claim 2, characterized in that, The length of the long bottom edge of the first measuring block is twice the length of the short bottom edge.

4. The device for measuring the air gap between the stator and rotor of a hydro-generator set as described in claim 1, characterized in that, The dial indicator measuring end is arranged parallel to the first measuring rod or the second measuring rod, and the blocking member is arranged perpendicular to the dial indicator measuring end.

5. The device for measuring the air gap between the stator and rotor of a hydro-generator set as described in claim 4, characterized in that, The dial indicator measuring end is positioned facing away from the second measuring block, and the blocking member is positioned at the end of the dial indicator away from the second measuring block.

6. The device for measuring the air gap between the stator and rotor of a hydro-generator set as described in claim 5, characterized in that, The second measuring rod has a through groove on its body below the blocking member, through which the fixing rod passes. The fixing rod passes through one end of the second measuring rod and is fixedly connected to the dial indicator.

7. The device for measuring the air gap between the stator and rotor of a hydro-generator set as described in claim 1, characterized in that, The blocking element is configured as a rod, and the blocking element is perpendicular to the second measuring rod.

8. The device for measuring the air gap between the stator and rotor of a hydro-generator set as described in claim 1, characterized in that, A slide rail and a slider are provided between the relative sliding inclined surfaces of the first measuring block and the relative sliding inclined surfaces of the second measuring block, and the slide rail and the slider are slidably connected.

9. The device for measuring the air gap between the stator and rotor of a hydro-generator set as described in claim 1, characterized in that, The contact surface is configured to conform to the contour of the object being measured.

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