CN210957941U - Novel vibration isolation structure for stator core of steam turbine generator - Google Patents

Abstract

The utility model discloses a novel turbo generator stator vibration isolation structure unshakable in one's determination, the vibration isolation structure includes: the supporting part is connected with the stator core of the steam turbine generator; the outer machine base comprises a plurality of machine base ring plates which are arranged in parallel around the stator core and a base plate which is arranged along the axial direction of the stator core and is respectively connected with the machine base ring plates; the vibration isolation unit comprises a horizontal support body and a vertical support body, the horizontal support body and the vertical support body form a T-shaped structure, three end parts of the vibration isolation unit are respectively connected with the base plate and the two base ring plates, and the other end of the vertical support body is connected with the support part. Compared with the prior art, the utility model discloses the vibration isolation effect of vibration isolation structure has each spare part simple structure under satisfying relevant standard prerequisite, and easy manufacturing, inside and outside stator installation cycle is short, characteristics with low costs.

Description

Novel vibration isolation structure for stator core of steam turbine generator

Technical Field

The utility model belongs to the technical field of turbo generator, stator core vibration isolation, especially, relate to a novel turbo generator stator core vibration isolation structure.

Background

The existing inner and outer stator generator iron core vibration isolation structure is divided into two types: vertical spring plate structure and axial vibration isolation beam structure.

The vertical spring plate structure is axially arranged on two sides of the stator, and is connected with the inner stator and the base in a bolted or welded mode, and is currently adopted on 600MW, 1000MW and full-hydrogen-cooled generators.

The axial vibration isolation beam structure is provided with a vibration isolation beam on each of two sides of the machine base, and the inner stator is welded on the vibration isolation beam through the supporting arm. The vibration isolation structure is simple to assemble and is generally adopted on a small-capacity generator.

When stator equipment in generator, the design degree of difficulty of vertical spring plate structure is big, the stability problem appears easily, and the clearance needs to join in marriage in fact simultaneously, and assembly work volume is big, and the cycle length still needs to add auxiliary stay when the transportation. When the vibration isolation beam structure is excited by iron core frequency doubling, the stress is horizontal and radial, so that the vibration isolation beam is required to have weaker rigidity in the horizontal direction to achieve the purpose of vibration isolation, the vibration isolation effect mainly depends on the length between the supporting arm and the fixed point of the vibration isolation beam and the thickness of the vibration isolation beam in the horizontal direction, but considering that the gravity and the two-phase short-circuit stress in the vertical direction need to bear shearing and bending stress in the vertical direction, the vibration isolation beam is required to have enough height in the vertical direction to increase the rigidity of the vibration isolation beam in the direction, so that the vibration isolation beam is thin in the horizontal direction, and the structural characteristic of being thick in the vertical direction causes the problems that the local stress is too large at the welding position of the supporting arm and the vibration isolation beam, the weight of the vibration isolation beam is increased and the.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to overcome the problems of the prior art, the novel stator core vibration isolation structure of the turbonator is provided, and the stator core vibration isolation structure has strong vibration isolation performance in the horizontal direction and the vertical direction.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a novel turbo generator stator core vibration isolation structure which characterized in that, the vibration isolation structure includes: the supporting part is connected with the stator core of the steam turbine generator; an outer housing; and the vibration isolation unit comprises a horizontal support body and a vertical support body, the horizontal support body and the vertical support body form a T-shaped structure, three end parts of the vibration isolation unit are respectively connected with the outer machine base, and the other end of the vertical support body is connected with the support part.

Through the utility model discloses the T type structural design of vibration isolation unit in the device, it is that this T type vibration isolation unit equivalence is parallelly connected for three direction spring promptly for the vibration that comes by the supporting part transmission can be followed 3 direction transmissions through this structure. And through a plurality of vibration isolation units, the release of the vibration force can be completed quickly, and the vibration damage of the stator core is reduced. Meanwhile, the vibration isolation effect of the vibration isolation unit has the advantages of simple structure of each part and easy manufacture on the premise of meeting relevant standards.

According to a preferred embodiment, the outer frame comprises a plurality of frame ring plates arranged in parallel around the stator core and a base plate arranged axially along the stator core and connected to each frame ring plate respectively

According to a preferred embodiment, the support portion includes a support ring disposed circumferentially around and in contact with the stator core, and a support arm disposed outside the support ring and in contact with the vibration isolation unit.

According to a preferred embodiment, an adjusting cushion block is further arranged between the supporting arm and the vibration isolation unit. Through set up the regulation cushion between support arm and vibration isolation unit, can further guarantee the compactness of connecting between two functional unit to improve the vibration isolation effect of vibration isolation unit.

According to a preferred embodiment, the supporting arm is a plate-shaped structure, and the plate body plane of the supporting arm is parallel to the extending direction of the vertical supporting body.

Through the structure setting of this support arm, make the conduction process of power for going on along the face. Therefore, the supporting strength of the supporting arm is guaranteed, and the supporting arm is made of the least material.

According to a preferred embodiment, the horizontal and vertical supports are plate-like structures.

According to a preferred embodiment, the corresponding planes of the plates of the horizontal and vertical supports are parallel to each other.

The main scheme and the further selection schemes of the utility model can be freely combined to form a plurality of schemes, which are the schemes that can be adopted and claimed by the utility model; and the utility model discloses also can the independent assortment between (each non-conflict selection) selection and between other choices. The technical solutions to be protected by the present invention, which are various combinations that can be known to those skilled in the art based on the prior art and the common general knowledge after understanding the present invention, are not exhaustive herein.

The utility model has the advantages that: compared with the prior art, the vibration isolation effect using the novel vibration isolation structure has the advantages of simple structure of each part, easy manufacture, short installation period of the inner stator and the outer stator and low cost on the premise of meeting relevant standards. The vibration isolation structure has the advantage of higher reliability in transportation and operation.

Drawings

Fig. 1 is a schematic view of the vibration isolation structure of the present invention;

fig. 2 is a schematic structural view of the vibration isolation unit of the present invention;

the vibration isolation device comprises a support ring 101, a support arm 102, a support arm 103, an adjusting cushion block 104, a base ring plate 105, a base plate 105, a vibration isolation unit 200, a horizontal support 201 and a vertical support 202.

Detailed Description

The following non-limiting examples serve to illustrate the invention.

Example 1:

referring to fig. 1, a novel vibration isolation structure for a stator core of a steam turbine generator is shown. The vibration isolation structure includes: a support part, an outer housing, and a vibration isolation unit 200.

Preferably, the support portion is connected to a stator core of the steam turbine generator. The stator core is used for completing direct connection and fixation and mechanical support of the stator core.

Further, the support portion comprises a support ring 101 and a support arm 102. The support ring 101 is arranged circumferentially around the stator core and is connected to the stator core. The support arm 102 is disposed outside the support ring 101 and is connected to the vibration isolation unit 200.

Preferably, an adjusting cushion block 103 is further disposed between the supporting arm 102 and the vibration isolation unit 200. By arranging the adjusting cushion block 103 between the supporting arm 102 and the vibration isolation unit 200, the tightness of connection between the two functional components can be further ensured, so that the vibration isolation effect of the vibration isolation unit 200 is improved.

Preferably, the outer frame comprises a plurality of frame ring plates 104 arranged in parallel around the stator core and a base plate 105 arranged along the axial direction of the stator core and respectively connected with the frame ring plates 104. The outer machine base is fixed on the external supporting platform, so that the stator core is supported and fixed.

Further, a vibration isolation unit 200 is disposed between each two housing ring plates 104. Used for completing the vibration isolation between the supporting part and the outer machine base.

Preferably, the vibration isolating unit 200 includes a horizontal support 201 and a vertical support 202. The horizontal support 201 and the vertical support 202 constitute a T-shaped structure. The horizontal support 201 and the vertical support 202 may be connected by welding.

Three ends of the vibration isolation unit 200 are respectively connected with the base bottom plate 105 and the two base ring plates in the outer base. And the other end of the vertical support 202 is connected with the support.

Through the utility model discloses the T type structural design of vibration isolation unit 200 in the device, it is that this T type vibration isolation unit 200 equivalence is parallelly connected for three direction spring promptly for the vibration that comes by the supporting part transmission can be followed 3 direction transmissions through this structure. And through a plurality of vibration isolation units 200, the release of the vibration force can be completed rapidly, and the vibration damage of the stator core is reduced. Meanwhile, the vibration isolation effect of the vibration isolation unit 200 has the advantages of simple structure of each part and easy manufacture on the premise of meeting relevant standards.

Further, the support arm 102 in the support portion is a plate-like structure. And the plate body plane of the supporting arm 102 is parallel to the extending direction of the vertical supporting body 202. By the structural arrangement of the support arm 102, the force transmission process is performed along the plate surface. Thereby minimizing the material used for the support arm 102 while ensuring the support strength of the support arm 102.

Preferably, the horizontal support 201 and the vertical support 202 are plate-shaped structures. And the corresponding planes of the plate bodies of the horizontal supporting body and the vertical supporting body are parallel to each other.

Through the structural design of the horizontal support body 201 and the vertical support body 202, the structural strength and the vibration isolation performance of the vibration isolation unit can be ensured under the condition that the weight of the vibration isolation unit is as low as possible.

Compared with the prior art, the vibration isolation effect using the novel vibration isolation structure has the advantages of simple structure of each part, easy manufacture, short installation period of the inner stator and the outer stator and low cost on the premise of meeting relevant standards. The vibration isolation structure has the advantage of higher reliability in transportation and operation.

The aforesaid the utility model discloses basic embodiment and each further alternative can the independent assortment in order to form a plurality of embodiments, is the utility model discloses can adopt and claim the embodiment of protection. In the scheme of the utility model, each selection example can be combined with any other basic examples and selection examples at will.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (7)

1. The utility model provides a novel turbo generator stator core vibration isolation structure which characterized in that, the vibration isolation structure includes:

the supporting part is connected with the stator core of the steam turbine generator;

an outer housing; and

the vibration isolation unit comprises a horizontal support body and a vertical support body, the horizontal support body and the vertical support body form a T-shaped structure, three end parts of the vibration isolation unit are respectively connected with the outer machine base, and the other end of the vertical support body is connected with the support part.

2. The structure of claim 1, wherein the outer frame comprises a plurality of frame ring plates disposed in parallel around the stator core and a plurality of ground plates disposed axially along the stator core and connected to the frame ring plates.

3. The structure of claim 1, wherein the support portion comprises a support ring and a support arm, the support ring is circumferentially disposed around the stator core and connected to the stator core, and the support arm is disposed outside the support ring and connected to the vibration isolation unit.

4. The vibration isolation structure for a stator core of a steam turbine generator as claimed in claim 3, wherein an adjusting cushion block is further provided between the supporting arm and the vibration isolation unit.

5. The structure of claim 4, wherein the supporting arm is a plate-like structure, and a plate plane of the supporting arm is parallel to an extending direction of the vertical supporting body.

6. The structure of claim 1, wherein the horizontal and vertical supports are plate-shaped.

7. The structure of claim 6, wherein the corresponding planes of the plates of the horizontal and vertical supports are parallel to each other.

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