Tool for measuring chord distance between stator positioning ribs of generator set

Abstract

Compared with the prior art, the tool for measuring the chord distance between the positioning ribs of the generator set stator disclosed by the utility model has the following beneficial effects that the chord distance between the positioning ribs can be rapidly measured, the measurement efficiency can be improved, the measurement precision can be ensured, and the tool comprises a rod body, and a first positioning piece and a second positioning piece which are respectively arranged at two ends of the rod body; the first positioning piece comprises a positioning plate extending in the length direction of the rod body and a positioning notch formed in the end of the positioning plate. And the second positioning piece comprises a positioning surface perpendicular to the positioning plate, and the rod body is provided with a dial indicator head on one side of the positioning surface.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of hydropower station engineering, especially to a tool for measuring the chord distance between the stator positioning ribs of a generator set. BACKGROUND

[0002] The stator positioning rib is one of the main components of the generator stator, and its main function is to fix the position of the generator core and coil to ensure the roundness of the generator for normal operation. The installation quality of the positioning rib is directly related to the quality of the stator lamination stacking, and the quality of the stator lamination stacking directly affects the installation quality of the stator bar. The vibration of the stator during the operation of the generator and the heating degree of the stator core are closely related to the installation quality of the positioning rib, and are also the most basic and critical factors for the assembly of the stator and the operation quality of the generator set. Therefore, the installation precision of the positioning rib is required to be high.

[0003] The traditional positioning rib measurement and adjustment method measures the chord distance between the adjacent two positioning ribs at the upper, middle and lower parts by using an inside diameter micrometer, then records the data, calculates the average value and adjusts the deviation.

[0004] However, due to the similar conical shape of the tail and head of the inside diameter micrometer, the tail is placed on one side of the positioning rib, and the measurement reading is taken by rotating the measuring rod knob of the head of the inside diameter micrometer. During the measurement process, two people need to cooperate or work together, one person holds the micrometer rod while the tail of the inside diameter micrometer is fixed on the positioning rib to prevent the tail from shaking back and forth, and the other person adjusts the position of the micrometer head, adjusts the knob, measures the minimum value and fixes the reading record. During the measurement process, the measurement needs to be swung, although the measurement accuracy can be guaranteed, but the measurement efficiency is low, and the work load of the measurement is large. The use of the inside diameter micrometer takes a long time, so there is an urgent need for a device specially used for measuring the chord distance between the positioning ribs. SUMMARY

[0005] The utility model aims at solving the above-mentioned problem and provides a tool for measuring the chord distance between the stator positioning ribs of a generator set.

[0006] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a tool for measuring the chord distance between the stator positioning ribs of a generator set, comprising: a rod body, a first positioning member and a second positioning member arranged at both ends of the rod body; the first positioning member comprises a positioning plate extending along the length direction of the rod body and a positioning notch arranged at the end of the positioning plate; the second positioning member comprises a positioning surface arranged perpendicularly to the positioning plate, and the rod body is provided with a dial indicator head on one side of the positioning surface.

[0007] Further, the positioning gap comprises a second positioning surface in the same plane as the positioning surface, and the dial gauge head is arranged on the side of the positioning surface close to the positioning gap.

[0008] Further, a connecting plate is arranged perpendicularly on the end of the positioning plate, and the connecting plate is detachably fixedly connected with the rod body.

[0009] Further, the second positioning member is a plate arranged on the end of the rod body, and the positioning surface is the surface of the plate.

[0010] Further, an installation plane is arranged on the end of the rod body, and an elastic clamp is arranged on the installation plane, and the dial gauge head is clamped with the elastic clamp.

[0011] Further, the rod body comprises a first rod and a second rod which is guided into the first rod in a plug-in manner, a locking member for locking the first rod is arranged on the side wall of the first rod, the first positioning member is arranged on the end of the second rod, and the second positioning member is arranged on the end of the first rod.

[0012] Further, a strip-shaped groove is arranged on the outer circumferential surface of the second rod in the length direction, a pressing plate is guided and slidably fitted in the strip-shaped groove, and the locking member comprises a locking screw which is screwed on the side wall of the first rod.

[0013] Further, a guide hole is arranged on the pressing plate, and the end of the locking screw is provided with a positioning column which is plugged with the positioning hole.

[0014] The utility model discloses a kind of tools for measuring the chord distance between the positioning rib of generator set stator compared with prior art has the following beneficial effects: the chord distance between positioning rib can be quickly measured, improve measurement efficiency, and can guarantee measurement accuracy, including rod body, first positioning member and second positioning member separately arranged in the both ends of rod body;The first positioning member includes the positioning plate arranged along the length direction of rod body and the positioning gap arranged on the end of positioning plate;The second positioning member includes the positioning surface vertically arranged with the positioning plate, located in the side of the positioning surface, and rod body is provided with dial gauge head. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall structure diagram of the utility model of a kind of tool for measuring the chord distance between the positioning rib of generator set stator Figure 1 .

[0016] Figure 2 It is the overall structure diagram of the utility model of a kind of tool for measuring the chord distance between the positioning rib of generator set stator Figure 2 .

[0017] Figure 3This is a schematic diagram of the overall structure of a tool for measuring the chord distance between the stator positioning ribs of a generator set. Figure 3 .

[0018] Figure 4 The utility model is a schematic diagram of the structure of an adjusting rod in a tool for measuring the chord distance between the positioning ribs of the stator of a generator set.

[0019] Figure 5 for Figure 2 The utility model is a schematic diagram of the partially enlarged structure of point A in a tool for measuring the chord distance between the stator locating ribs of a generator set.

[0020] Figure 6 for Figure 3 The utility model is a schematic diagram of a partially enlarged structure of point B in a tool for measuring the chord distance between the stator locating ribs of a generator set.

[0021] Figure 7 This is a partially enlarged structural schematic diagram of a locking screw and a pressure plate in a tool for measuring the chord distance between positioning ribs of a generator set stator according to the present invention.

[0022] Figure 8 This is a schematic diagram of the cross-sectional structure of two adjacent positioning ribs of a generator set.

[0023] In the figure: 1, rod body; 10, first rod; 101, mounting plane; 11, second rod; 110, strip groove; 12, locking member; 121, positioning column; 122, locking screw; 123, handwheel; 13, pressure plate; 131, positioning hole;

[0024] 2. First positioning member; 20. Connecting plate; 21. Positioning plate; 22. Positioning notch; 23. Second positioning surface;

[0025] 3. Second positioning member;

[0026] 4. Clamping piece; 41. Elastic clip; 42. Clamping bolt;

[0027] 5. Dial indicator head; 6. Positioning rib; 61. Inclined surface; 62. Side surface; 63. Edge. DETAILED DESCRIPTION

[0028] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner, and thus only show components related to the present invention.

[0029] Please refer to Figure 1-3To achieve the above-mentioned purpose, the technical solution of the present invention is: a tool for measuring the chord distance between the positioning ribs of the stator of a generator set, comprising: a rod body 1, a first positioning member 2 and a second positioning member 3 respectively arranged at both ends of the rod body 1; the first positioning member 2 includes a positioning plate 21 extending along the length direction of the rod body and a positioning notch 22 arranged at the end of the positioning plate 21; the second positioning member 3 includes a positioning surface perpendicular to the positioning plate 21, located on one side of the positioning surface, and the rod body 1 is provided with a dial indicator head 5.

[0030] Specifically, refer to Figure 8 , is a structural diagram of two adjacent positioning ribs 6 of a generator stator in the prior art, Figure 8 The middle arc is the arrangement direction of the positioning ribs 6. The positioning ribs include side surfaces 62 and inclined surfaces 61. The present application sets a first positioning member and a second positioning member. During detection, the dial indicator head 5 is installed on the first rod 10, and ensures that the distance between the detection end of the dial indicator head and the positioning notch is slightly larger than the distance between the two positioning ribs 6, so that the dial indicator head has a certain compression of 1-2 mm during detection. This process can be adjusted by using two adjacent positioning ribs with a standard distance as a standard. After adjustment, use a measuring tool to measure two adjacent positioning ribs with standard sizes. The positioning notch 22 of the first positioning member can be positioned at the intersection of the inclined surface 61 and the side surface 62 of one positioning rib 6, which can prevent the first positioning member from swinging in the horizontal direction. The positioning surface of the second positioning member contacts and is positioned with the side surface 62 of the other positioning rib 6. At this time, the detection contact of the dial indicator head 5 contacts the inclined surface of the other positioning rib 6. At this time, it is only necessary to swing the second positioning member up and down to observe the compression of the dial indicator head 5. When the compression of the dial indicator head is the largest, the dial indicator head is adjusted to zero. Then use the zeroed measuring tool to measure the chord distance of the locating ribs. During measurement, the locating notch 22 of the first locating piece can be positioned in coordination with the intersection of the inclined surface 61 and the side surface 62 of a locating rib 6, which can prevent the first locating piece from swinging in the horizontal direction. The locating surface of the second locating piece is in contact with the side surface 62 of another locating rib 6 for positioning. At this time, the detection contact of the dial indicator head 5 is in contact with the inclined surface of another locating rib 6. At this time, you only need to swing the second locating piece up and down, observe the compression amount of the dial indicator head 5, and read the reading when the compression amount of the dial indicator head is the largest. In this way, the chord distance between the locating ribs can be measured quickly, the measurement efficiency can be improved, the measurement accuracy can be guaranteed, and it can be completed by one person.

[0031] Furthermore, the positioning notch 22 includes a second positioning surface 23 that is coplanar with the positioning surface, and the dial indicator head 5 is disposed on a side of the positioning surface close to the positioning notch 22 .

[0032] Furthermore, as a specific embodiment, a connecting plate 20 is vertically provided at the end of the positioning plate 21 , and the connecting plate 20 is detachably fixedly connected to the rod body 1 .

[0033] Further, as a preferred embodiment, referring to Figure 2 , Figure 5 , the second positioning member 3 is a plate body arranged at the end of the rod body 1, and the positioning surface is the plate surface of the plate body. Specifically, the second positioning member 3 is fixedly connected to the end of the rod body 1 by welding, and the second positioning member has a plate-shaped structure. In a specific implementation process, the length of the second positioning member and the length of the second positioning surface are both greater than the width of the side surface 62 along the length direction of the rod body. By this arrangement, the second positioning surface 23 can be in contact with the edge 63 of one positioning rib during measurement, and the positioning surface of the second positioning member can be in contact with the edge of another positioning rib 6. Since the two edges 63 of the two positioning ribs 6 are in the same plane, the second positioning member will not swing in a direction perpendicular to the positioning surface when it swings up and down, thereby ensuring the accuracy of the measurement.

[0034] Further, as a specific embodiment, referring to Figure 3 , Figure 6 , the end of the rod body 1 is provided with a mounting plane 101, and the mounting plane is provided with an elastic clamp 41, and the dial gauge head 5 is clamped and connected with the elastic clamp 41. Specifically, the mounting plane 101 is provided with a first threaded hole (not shown in the figure), and a compression bolt 42 is threadedly connected in the first threaded hole. The elastic clamp 41 is provided with a through hole (not shown in the figure) for the compression bolt to pass through and a clamping hole for the dial gauge head measuring rod to pass through. When the compression bolt compresses the elastic clamp, the dial gauge head can be clamped. When the compression bolt is loosened from the first threaded hole, the elastic clamp rebounds under the action of elasticity, releasing the dial gauge head, thereby achieving the fixing effect.

[0035] Further, the rod body 1 includes a first rod 10 and a second rod 11 which is guided and inserted into the first rod 10, and the first rod 10 is provided with a locking member 12 for locking the first rod 10. The first positioning member 2 is arranged at the end of the second rod 11, and the second positioning member 3 is arranged at the end of the first rod 10.

[0036] Further, as a preferred embodiment, the rod body includes a first rod and a second rod which are guided and inserted into each other, and is provided with a locking member 12. By this arrangement, the length of the rod body can be adjusted, and after adjustment, the locking member 12 is locked, thereby being able to cope with different chord distance measurements of various generators and improving the adaptability.

[0037] Further, as a specific embodiment, a strip-shaped slot 110 is arranged on the outer circumferential surface of the second rod 11 in the length direction, a pressing plate 13 is guided and slidably fitted in the strip-shaped slot 110, and the locking member 12 comprises a locking screw 122 which is threadedly connected to the side wall of the first rod 10. As a specific embodiment, the two ends of the strip-shaped slot 110 are not penetrated through the end of the second rod, and through this arrangement, the second rod can be limited by the pressing plate, so as to avoid that the second rod is separated from the first rod after being excessively pulled out. The pressing plate 13 can be guided and slidably arranged in the strip-shaped slot 110, the thickness of the pressing plate is less than the depth of the strip-shaped slot 110, and through this arrangement, the pressing plate 13 can be locked by the locking screw 122, the bottom of the strip-shaped slot 110 is contacted and locked by the pressing plate, so as to axially position the first rod and the second rod, and through this arrangement, the second rod can also be circumferentially positioned by the pressing plate and the strip-shaped slot.

[0038] Further, as a preferred embodiment, referring to Figure 7 , the pressing plate 13 is provided with a positioning hole 131, and the end of the locking screw 122 is provided with a positioning column 121 which is insertedly fitted with the positioning hole 131. Specifically, through this arrangement, the pressing plate 13 can be positioned by inserting the positioning column 121 into the positioning hole 131, so as to achieve better positioning effect of the second rod after the pressing plate 13 is pressed against the second rod, and the pressing plate 13 can be limited by the positioning cooperation of the positioning hole and the positioning column 121, so as to avoid that the limiting plate is fallen off.

[0039] Obviously, the above embodiments are only examples for clearly illustrating, but not limitation to the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The changes or variations which are extended from the above are still within the protection scope of the present application.

Claims

1. A tool for measuring the chord distance between the stator ribs of a generator set, characterized in that: include: A rod body (1), a first positioning member (2) and a second positioning member (3) are respectively provided at both ends of the rod body (1); the first positioning member (2) includes a positioning plate (21) extending along the length direction of the rod body and a positioning notch (22) provided at the end of the positioning plate (21); the second positioning member (3) includes a positioning surface provided perpendicular to the positioning plate (21) and located on one side of the positioning surface; the rod body (1) is provided with a dial indicator head (5).

2. A tool for measuring the chord distance between the stator locating ribs of a generator set according to claim 1, characterized in that: The positioning notch (22) includes a second positioning surface (23) that is coplanar with the positioning surface, and the dial indicator head (5) is arranged on a side of the positioning surface close to the positioning notch (22).

3. A tool for measuring the chord distance between the stator locating ribs of a generator set according to claim 1, characterized in that: A connecting plate (20) is vertically provided at the end of the positioning plate (21), and the connecting plate (20) is detachably fixedly connected to the rod body (1).

4. The tool for measuring the chord distance between the stator locating ribs of a generator set according to claim 1, characterized in that: The second positioning member (3) is a plate body arranged at the end of the rod body (1), and the positioning surface is the plate surface of the plate body.

5. A tool for measuring the chord distance between the stator locating ribs of a generator set according to claim 4, characterized in that: The end of the rod body (1) is provided with a mounting plane (101), an elastic clip (41) is provided on the mounting plane, and the dial indicator head (5) is clamped and connected to the elastic clip (41).

6. The tool for measuring the chord distance between the stator locating ribs of a generator set according to claim 1, characterized in that: The rod body (1) comprises a first rod (10) for plugging and fitting, and a second rod (11) for guiding and inserting into the first rod (10); a locking member (12) for locking and fitting the first rod (10) is provided on a side wall of the first rod (10); the first positioning member (2) is provided at an end of the second rod (11); and the second positioning member (3) is provided at an end of the first rod (10).

7. A tool for measuring the chord distance between the stator locating ribs of a generator set according to claim 6, characterized in that: Along the length direction, a strip groove (110) is provided on the outer peripheral surface of the second rod (11), and a pressure plate (13) is slidingly matched with the guide in the strip groove (110). The locking member (12) includes a locking screw (122) threadedly connected to the side wall of the first rod (10).

8. The tool for measuring the chord distance between the stator locating ribs of a generator set according to claim 7, characterized in that: A positioning hole (131) is provided on the pressing plate (13), and a positioning column (121) that is plugged into and fits with the positioning hole (131) is provided at the end of the locking screw (122).

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