Stator core pressing ring and generator

Abstract

The utility model relates to the technical field of turbonator design and manufacture, and specifically discloses a stator core pressing ring and a generator. The stator core pressing ring comprises a pressing ring body and a groove arranged on the inner side of the pressing ring body. The utility model further discloses a generator based on the stator core pressing ring. According to the utility model, the grooves are arranged on the inner circle of the pressing ring body, so that the pressing function of the iron core pressing ring is not influenced, the ventilation and heat dissipation area can be increased, and the temperature rise of the pressing ring is effectively improved; therefore, under the condition that the size of the steam turbine generator is not changed, the capacity of the steam turbine generator is effectively maximized.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine generator design and manufacturing, and more specifically, to a stator iron core pressing ring and a generator. Background Art

[0002] After the large steam turbine generator stator core A is pressed, it is fastened into a whole through the end structure;

[0003] like Figure 6 As shown in the figure, the leakage magnetic field D at the stator end of the generator is mainly concentrated on the stator end structural parts such as the inner circle of the stator core pressure ring B and the pressure finger C and the outermost core teeth, resulting in increased additional losses and higher temperatures in these parts.

[0004] The heating of the stator end structural parts may affect the output and operation mode of the generator, and in serious cases may endanger the safe operation of the generator. It is extremely important to solve the heating problem of the stator end structural parts;

[0005] The inner circle of the existing stator core ring is a smooth surface, which is easy and quick to process. The contact area between the inner circle of the core ring and the cooling gas is limited. For extra-large steam turbine generators, the stator end leakage magnetic field is strong, the inner circle loss of the core ring is particularly large, and the heat generation is more serious; due to the above problems of the core ring, it is impossible to maximize the motor capacity in a limited space without affecting the overall stiffness.

[0006] For large steam turbine generators in the prior art, how to maximize the motor capacity within a limited space without affecting the overall stiffness and structural size is a problem to be solved. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a stator core pressing ring and a generator; by arranging a groove on the inner side of the pressing ring body, the clamping function of the core pressing ring is not affected, and at the same time the ventilation and heat dissipation area can be increased, and the temperature rise of the pressing ring is effectively improved; thereby achieving the maximum capacity of the steam turbine generator without changing the size of the steam turbine generator.

[0008] The solution adopted by the utility model to solve the technical problem is:

[0009] on the one hand:

[0010] The utility model discloses a stator iron core pressing ring and a generator, comprising a pressing ring body and a slot arranged on the inner side of the pressing ring body.

[0011] In some possible implementations,

[0012] There are multiple grooves which are arranged at equal intervals along the circumference of the pressure ring body.

[0013] In some possible implementations,

[0014] The groove is in an arc-shaped structure.

[0015] In some possible implementations,

[0016] The groove is a semicircular arc structure or a U-shaped structure.

[0017] In some possible implementations,

[0018] The pressing ring body is in a circular ring structure.

[0019] In some possible implementations,

[0020] The groove penetrates the pressing ring body along the axial direction of the pressing ring body.

[0021] on the other hand:

[0022] The utility model also discloses a generator, comprising the stator core pressing ring as described above.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The utility model arranges a plurality of arc grooves with the same structure at equal intervals along the circumference of the inner side of the pressing ring body, and the contact surface between the inner circle and the outside is greatly increased by arranging the arc grooves, thereby accelerating the heat exchange of the pressing ring body, and then effectively realizing the change of the temperature rise of the stator core pressing ring;

[0025] The utility model can improve the temperature rise of the stator core pressing ring without changing the size of the pressing ring body and meeting the overall rigidity, thereby maximizing the motor capacity without changing the size of the entire unit;

[0026] The utility model has the advantages of simple structure and strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0028] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0029] Figure 3 It is a top view of the utility model;

[0030] Figure 4 It is a cross-sectional view of the utility model;

[0031] Figure 5 It is a structural schematic diagram in the prior art;

[0032] Figure 6 It is a schematic diagram of the magnetic circuit at the end of the generator in the prior art;

[0033] Wherein: 1. Pressing ring body; 11. Groove. DETAILED DESCRIPTION

[0034] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. The "first", "second" and similar words mentioned in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "one" and other similar words do not indicate a quantity limit, but indicate the existence of at least one. In the implementation of this application, "and / or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can indicate: A exists alone, A and B exist at the same time, and B exists alone. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more. For example, multiple positioning columns refer to two or more positioning columns. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0035] The utility model is described in detail below.

[0036] on the one hand:

[0037] like Figure 1-Figure 5 As shown:

[0038] The utility model discloses a stator iron core pressing ring, which comprises a pressing ring body 1 and a slot 11 arranged on the inner side of the pressing ring body 1.

[0039] In some possible implementations,

[0040] There are multiple grooves 11 and they are arranged at equal intervals along the circumference of the pressing ring body 1, so that the pressing ring body 1 can exchange heat evenly. The multiple grooves 11 have the same structure.

[0041] The utility model arranges a plurality of grooves 11 at equal intervals along the circumference of the inner side of the pressing ring body 1, wherein the inner side described here is the inner circle. Since the grooves 11 are arranged at intervals and on the inner circle of the pressing ring body 1, the pressing ring realizes the clamping function by using its side surface, so that the arrangement of the grooves 11 will not affect the clamping function. At the same time, due to the arrangement of the grooves 11, the surface area of ​​the inner side surface of the pressing ring body 1 will be increased, thereby increasing the ventilation and heat dissipation area, that is, increasing the contact area between the inner circle and the outside world, thereby effectively improving the temperature rise of the inner circle of the stator core pressing ring. Thus, the motor capacity can be effectively maximized without changing the overall stiffness and overall size.

[0042] In some possible implementations, in order to facilitate processing;

[0043] The groove 11 is in an arc-shaped structure.

[0044] In some possible implementations,

[0045] The groove 11 is a semicircular arc structure or a U-shaped structure.

[0046] In some possible implementations,

[0047] The pressing ring body 1 is in a circular ring structure.

[0048] In some possible implementations,

[0049] The groove 11 penetrates the pressing ring body 1 along the axial direction of the pressing ring body 1 .

[0050] The groove 11 penetrates the pressing ring body 1 along the local axial direction of the pressing ring, so that the contact area between the inner circle and the outside is maximized; during use, heat exchange can be accelerated, thereby effectively improving the temperature rise of the inner circle of the stator core pressing ring.

[0051] Embodiment 1:

[0052] like Figure 1-Figure 5 As shown:

[0053] The pressing ring body 1 is annular in structure, the groove 11 is semicircular in structure and penetrates two side surfaces of the pressing ring body 1 (two side surfaces close to or away from the stator core) along the axial direction of the pressing ring body 1, and there are multiple grooves which are arranged at equal intervals along the circumference of the pressing ring body 1.

[0054] on the other hand:

[0055] The utility model also discloses a generator, comprising the stator core pressing ring as described above.

[0056] The present invention is not limited to the above-mentioned specific implementation modes, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A stator core pressing ring, characterized in that: The invention is suitable for a steam turbine generator, comprising a pressing ring body and a groove arranged inside the pressing ring body and used for heat exchange; a stepped hole is arranged inside the pressing ring body; and the groove is arranged on the inner side surface of the small end of the stepped hole.

2. A stator core pressing ring according to claim 1, characterized in that: There are multiple grooves which are arranged at equal intervals along the circumference of the pressure ring body.

3. The stator core pressing ring according to claim 1, characterized in that: The groove is in an arc-shaped structure.

4. A stator core pressing ring according to claim 3, characterized in that: The groove is a semicircular arc structure or a U-shaped structure.

5. A stator core pressing ring according to any one of claims 1 to 4, characterized in that: The pressing ring body is in a circular ring structure.

6. The stator core pressing ring according to claim 1, characterized in that: The groove penetrates the pressing ring body along the axial direction of the pressing ring body.

7. A generator, characterized in that: It comprises the stator core pressing ring as described in any one of claims 1 to 6.

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