Inner support ring structure of high-capacity surface-cooled generator

Abstract

The utility model relates to an inner support ring structure of a high-capacity surface-cooled generator, which comprises an inner support ring, a phase bar and a common bar, the inner support ring is provided with a ventilation slot, the ventilation slot is arranged along the radial direction of the inner support ring, the ventilation slot is a long waist-shaped hole, and the center of the long waist-shaped hole directly faces the corner of the phase bar. The center of the bent angle of the phase bar and the adjacent common bar is the center of the semicircles at the two ends of the long kidney-shaped hole; ventilation grooves with the same shape and size are formed in the central positions, right opposite to the positions between every two phase belts of the generator, of the inner supporting ring; and the inner support ring is provided with the ventilation slots, so that the cooling effect of the end winding is further enhanced, and the device can be used in a high-capacity high-voltage cold generator.

Description

Technical Field

[0001] The utility model relates to the technical field of generator stator electrical engineering, in particular to an inner support ring structure of a large-capacity surface-cooled generator. Background Art

[0002] The stator winding end assembly of large-capacity surface-cooled generators utilizes a suspended binding structure, consisting of stator coils, parallel rings, inner and outer support rings, brackets, connecting copper bars, interlayer pressure rods, blocks, spacers, and limit blocks. Expansion felt is placed between the stator coils and the end structural components. After GVPI impregnation, all binding tape and expansion felt are impregnated and cured, forming a single unit with the stator winding and end support structure. This provides sufficient circumferential and radial strength and rigidity, while also allowing for free axial expansion and contraction to meet peak-shaving requirements.

[0003] The inner support ring is an annular structural component used to support and secure the stator end windings. It is typically installed near the core side of the generator stator end windings to provide support and stability. The inner support rings of large-capacity surface-cooled generators are made of fiberglass reinforced plastic (FRP). This material is made of E-type continuous glass fiber impregnated with a matching epoxy resin and wound in parallel. Axial reinforcement is provided with glass mat, resulting in high strength and wear resistance. The rational structural design ensures that the inner support ring maintains stability and safety despite the weight of the end windings and the vibration and impact forces generated during operation.

[0004] Due to the high voltage of large-capacity surface-cooled generators, the local loss at the stator winding ends is large, resulting in excessively high local temperatures at the stator winding ends. Utility Model Content

[0005] Aiming at the technical problem of excessively high local temperature at the stator winding end, an internal support ring structure for a large-capacity surface-cooled generator is proposed.

[0006] The technical solution of the utility model is: an inner support ring structure of a large-capacity surface-cooled generator, comprising an inner support ring, a phase wire rod, and an ordinary wire rod. A ventilation groove is provided on the inner support ring, and the ventilation groove is radially opened along the inner support ring. The ventilation groove is a long waist-shaped hole, and the center of the long waist-shaped hole is directly opposite to the bend of the phase wire rod. The center of the bend of the phase wire rod and the ordinary wire rod adjacent to it is the center of the semicircle at both ends of the long waist-shaped hole; ventilation grooves of the same shape and size are provided on the inner support ring directly opposite to the center position between the two phase belts of the generator.

[0007] Preferably, the ventilation grooves are evenly distributed in the circumferential direction of the inner support ring.

[0008] Preferably, an end bracket is provided on the outer side of the inner support ring, and the ventilation slot is arranged at a position away from the end bracket.

[0009] The utility model discloses a large capacity table cooling generator inner support ring structure, which is characterized by the following technical scheme: a plurality of ventilation grooves are arranged on an inner support ring, and the ventilation grooves are radially arranged on the inner support ring. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is an inner support ring structure schematic diagram of the utility model generator;

[0011] Figure 2 It is an inner support ring overhead schematic diagram of the utility model generator;

[0012] Figure 3 It is an inner support ring position relation schematic diagram of the utility model generator;

[0013] Figure 4 It is Figure 3 A-A section view of the utility model.

[0014] In the drawings, the component names corresponding to each reference sign are as follows:

[0015] 1, inner support ring;11, ventilation groove;2, phase conductor;3, ordinary conductor;4, end support. DETAILED DESCRIPTION

[0016] The utility model will be described in detail below in combination with the drawings and specific embodiments. The embodiments are implemented on the premise of the technical scheme of the utility model, and give detailed implementation modes and specific operation processes, but the protection scope of the utility model is not limited to the following embodiments.

[0017] Reference Figure 2 、 4 The utility model provides a large capacity table cooling generator inner support ring structure, including inner support ring 1, phase conductor 2, ordinary conductor 3, be equipped with a plurality of ventilation grooves 11 on inner support ring 1, ventilation groove 11 is along the inner support ring radial and is set up, and ventilation groove 11 is long waist shape hole, and the long waist shape hole position center is opposite the corner of phase conductor 2, and the corner center of phase conductor 2 and its adjacent ordinary conductor 3 is the center of the semicircle of long waist shape hole two ends, to avoid long waist shape hole ventilation groove 11 two ends being adjacent line rod corner shielding;

[0018] The outer side of inner support ring 1 is equipped with end support 4, and the position of ventilation groove 11 avoids end support 4;

[0019] Specifically, reference Figure 3As shown, the ventilation grooves 11 are evenly distributed in the circumferential direction of the inner support ring 1; there are 18 ventilation grooves 11 in total in this embodiment, of which 6 are arranged in the middle of the phase belt;

[0020] Reference Figure 4 As shown in the A-A cross-sectional view, the cross section of the inner support ring 1, the ventilation groove 11 is 40 mm wide, and the two ends of the long-oval hole are semicircular arcs with a diameter of 40 mm; the center of the ventilation groove 11 is 55 mm away from the end face of the inner support ring 1;

[0021] The structure of the inner support ring 1 can increase the ventilation area by 10.25%, increase the local air volume by about 10%, increase the surface heat exchange coefficient of the wire rod in the inner support ring 1 area by about 6.3%, and reduce the hot spot temperature of the end coil by about 6K. After the inner support ring 1 is provided with the ventilation groove 11, modal calculation is performed, which meets the design requirements.

[0022] The beneficial effects of the utility model are: a novel large-capacity table cooling generator inner support ring structure is provided, ventilation grooves 11 are designed in the inner support ring, the cooling effect of the end winding is further enhanced, and the novel large-capacity table cooling generator inner support ring structure can be used in a large-capacity high-voltage table cooling generator.

[0023] It should be noted that the above terms "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. The terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. The meaning of "multiple" is two or more. "Mounting", "connection" and "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected.

[0024] The above is only a preferred embodiment of the utility model, and is not any form or substantial limitation on the utility model. It should be noted that for ordinary skilled persons in the art, without departing from the utility model, a number of improvements and supplements can be made, which should also be considered as the protection range of the utility model. Any equivalent changes, modifications and evolution made by those skilled in the art without departing from the spirit and scope of the utility model, and the equivalent embodiments of the utility model; at the same time, any equivalent changes, modifications and evolution of the above-mentioned embodiments according to the essential technology of the utility model, all belong to the range of the technical scheme of the utility model.

Claims

1. A large capacity tabled generator inner support ring structure, characterized by, It includes inner support ring (1), phase line rod (2), common line rod (3), and is provided with ventilation slot (11) on the inner support ring (1), the ventilation slot (11) is radially opened along the inner support ring, the ventilation slot (11) is long waist shape hole, the long waist shape hole position center is opposite the corner of phase line rod (2), and the corner center of phase line rod (2) and its adjacent common line rod (3) is the center of half circle of long waist shape hole two ends;Ventilation slot (11) of same shape and size is arranged on the inner support ring (1) and is opposite the center position between the two-phase belt of generator.

2. The support ring structure of the large capacity table-cooled generator according to claim 1, wherein The ventilation slot (11) is uniformly distributed in the circumferential direction of the inner support ring (1).

3. The inner support ring structure of the large capacity table-cooled generator according to claim 1, wherein The outer side of the inner support ring (1) is provided with an end support (4), and the position of the ventilation slot (11) is avoided from the end support (4).

Images