A detecting tool for the welding position of the tooth pressing strip of a tubular hydrogenerator

Abstract

The present invention belongs to the technical field of tubular hydro-generators, and particularly relates to a tool for detecting the welding position of tooth bars of a tubular hydro-generator. The tool for detecting the welding position of tooth bars of a tubular hydro-generator includes a positioning and detecting sample rod, which comprises an upper half part of the positioning and detecting sample rod, a lower half part of the positioning and detecting sample rod, a baffle for detecting the radial position of the tooth bar, which is fixedly connected to the positioning and detecting sample rod, and a handle of the positioning and detecting sample rod for holding. The present invention provides a tool for detecting the position of tooth bars, which has a simple structure, is easy to operate and has strong practicability. Before laminating the stator core, it is necessary to detect the position of the tooth bar to ensure the smooth installation of the subsequent generator stator coil.

Description

Technical Field

[0001] The present invention belongs to the technical field of tubular hydro-generators, and particularly relates to a detection tool for the welding position of tooth bars of a tubular hydro-generator. Background Art

[0002] In the stator components of a hydro-generator, the stator core is the main magnetic path of the stator and also the installation and fixing component of the stator coils. The stator core is stacked by each stator sector punching sheet. Each stator sector punching sheet is punched with many slots of the same shape. After stacking the stator core, the stator coils are installed in the slots. The upper and lower ends of each slot of the overall core are supported and clamped by tooth bars. During the structural design of the stator core, it is required that the center line of each tooth bar after installation deviates from the center of the stator core slot teeth by no more than 1 mm. If the installation position of the tooth bar deviates greatly from the stator core slot teeth, it will interfere with the installation of the stator coils into the slots, or cause scraping damage to the outer insulation layer of the stator coils. Therefore, the accuracy of the installation position of the tooth bar is crucial. In order to meet the design requirements for the installation accuracy of the tooth bar position, it is necessary to detect the tooth bar position before stacking the stator core. If the deviation is too large, it can be adjusted in advance to avoid affecting the subsequent installation of the stator coils.

[0003] Therefore, a detection tool for the welding position of tooth bars of a tubular hydro-generator that can solve the above problems is needed. Summary of the Invention

[0004] In view of the above problems, the present invention provides a detection tool for the welding position of tooth bars of a tubular hydro-generator. This detection tool has the advantages of simple structure, convenient operation, strong practicability, and the need to detect the tooth bar position before stacking the stator core to ensure the smooth installation of the subsequent generator stator coils.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a detection tool for the welding position of tooth bars of a tubular hydro-generator, including a positioning and detection sample rod. The positioning and detection sample rod includes an upper half of the positioning and detection sample rod, a lower half of the positioning and detection sample rod, a positioning and detection sample rod handle for holding, and a baffle for detecting the radial position of the tooth bar. The baffle is fixedly connected to the positioning and detection sample rod, and the upper half of the positioning and detection sample rod is fixedly connected to the lower half of the positioning and detection sample rod.

[0006] Further, the lower half of the positioning and detection sample rod is fixed to one end of the positioning and detection sample rod handle by welding, and the lower bottom surfaces of the lower half of the positioning and detection sample rod and the positioning and detection sample rod handle are flush.

[0007] Further, the baffle is fixed at the weld where the lower half of the positioning and detection sample rod and the positioning and detection sample rod handle are welded to each other by welding.

[0008] Further, the upper half of the positioning and detecting rod is fixed inside the lower half of the positioning and detecting rod by welding, and both ends of the upper half and the lower half of the positioning and detecting rod are aligned.

[0009] The advantages of the present invention are as follows: The present invention provides a tool for detecting the welding position of the tooth pressing strip of a tubular turbine generator. The positioning and detecting rod includes an upper half of the positioning and detecting rod, a lower half of the positioning and detecting rod, a baffle for detecting the radial position of the tooth pressing strip, which is fixedly connected to the positioning and detecting rod, and a positioning and detecting rod handle for holding. The tool for detecting the position of the tooth pressing strip of the present invention has the advantages of simple structure, convenient operation and strong practicability. The present invention can detect the position of the tooth pressing strip and has the advantage of ensuring the smooth installation of the subsequent generator stator coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0011] Figure 1 is a schematic structural diagram of the present invention;

[0012] Figure 2 is a schematic diagram of the usage method of the present invention;

[0013] Among them:

[0014] 1. Positioning and detecting rod; 2. Upper half of the positioning and detecting rod; 3. Lower half of the positioning and detecting rod;

[0015] 4. Baffle; 5. Positioning and detecting rod handle; 6. Stator core;

[0016] 7. Tooth pressing strip; 8. Stator frame; 9. Lower ring plate of the stator frame;

[0017] 10. Outer circle side; 11. Inner circle side; 12. Bottom of the stator core slot. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0019] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] Embodiment 1:

[0021] Figure 1 It is a schematic structural diagram of the present invention. Figure 2 It is a schematic diagram of the usage method of the present invention. The positioning and detecting sample rod 1 includes an upper half part 2 of the positioning and detecting sample rod, a lower half part 3 of the positioning and detecting sample rod, a baffle 4 for detecting the radial position of the tooth pressing strip 7. The baffle 4 is fixedly connected to the positioning and detecting sample rod 1, and a positioning and detecting sample rod handle 5 for holding. The upper half part 2 of the positioning and detecting sample rod is welded in the groove of the lower half part 3 of the positioning and detecting sample rod. The upper half part 2 of the positioning and detecting sample rod and the lower half part 3 of the positioning and detecting sample rod are flush at the front and rear ends. The baffle 4 is welded at the other end of the lower half part 3 of the positioning and detecting sample rod, and is welded together with the positioning and detecting sample rod 1 on both the left and right sides. The baffles 4 on both sides should be kept horizontal, and the surface of the baffle 4 is smooth without protrusions, particles and other foreign matters.

[0022] Working mode: Inside the inner circle side 11 of a general hydrogenerator, there is a lower ring plate 9 of the stator frame. A tooth pressing strip 7 is installed on the lower ring plate 9 of the stator frame. The stator core 6 is pre-stacked on the tooth pressing strip 7. After the tooth pressing strip 7 is installed and spot-welded, first, stator sector sheets with a height of 30 mm are pre-stacked at the upper end of the tooth pressing strip 7. Then, according to the requirements of the design drawing, the inner diameter size and the roundness wave of this section of the stator core 6 are adjusted to be qualified, and the entire ring of the stator core 6 is pressed with a pressing plate to prevent the size of the bottom of the stator core slot 12 from changing during subsequent inspection. Taking each slot of this section of the stator core 6 as the positioning reference, a positioning detection sample rod 1 is installed to verify the installation position accuracy of the bottom of each stator core slot 12 corresponding to two adjacent tooth pressing strips 7. In the first step, the upper half 2 of the positioning detection sample rod is inserted into the bottom of the stator core slot 12 and radially pressed against the bottom of the stator core slot 12 for positioning. Subsequently, the lower half 3 of the positioning detection sample rod is inserted into the middle position between two adjacent tooth pressing strips 7 to inspect the distance and concentricity between the tooth pressing strips 7. In the second step, while the positioning detection sample rod 1 is inserted into the bottom of the stator core slot 12, the radial position of the tooth pressing strip 7 is detected with the baffle 4 on the positioning detection sample rod 1 to ensure that the radial distance difference between the entire ring of tooth pressing strips 7 and each slot tooth of the stator core 6 is consistent.

[0023] The present invention provides a tooth pressing strip position detection tooling with simple structure, convenient operation and strong practicability, which has the advantage of detecting the position of the tooth pressing strip before laminating the stator core to ensure the smooth installation of the subsequent generator stator coil.

[0024] Finally, it should be noted that: The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A detection tool for the welding position of the tooth pressing strip of a tubular hydrogenerator, comprising a positioning and detection sample rod (1). It is characterized in that: The positioning and detection sample rod (1) includes an upper half part (2) of the positioning and detection sample rod, a lower half part (3) of the positioning and detection sample rod, a positioning and detection sample rod handle (5) for holding, and a baffle plate (4) for detecting the radial position of the tooth pressing strip (7). The baffle plate (4) is fixedly connected to the positioning and detection sample rod (1), and the upper half part (2) of the positioning and detection sample rod is fixedly connected to the lower half part (3) of the positioning and detection sample rod; The lower half part (3) of the positioning and detection sample rod is fixed at one end of the positioning and detection sample rod handle (5) by welding, and the lower bottom surfaces of the lower half part (3) of the positioning and detection sample rod and the positioning and detection sample rod handle (5) are flush; The baffle plate (4) is fixed at the weld where the lower half part (3) of the positioning and detection sample rod and the positioning and detection sample rod handle (5) are welded to each other by welding; The upper half part (2) of the positioning and detection sample rod is fixed inside the lower half part (3) of the positioning and detection sample rod by welding, and the two ends of the upper half part (2) of the positioning and detection sample rod and the lower half part (3) of the positioning and detection sample rod are aligned.

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