CN218226267U

CN218226267U - Auxiliary tool for machining collecting ring insulating cylinder of steam turbine generator

Info

Publication number: CN218226267U
Application number: CN202222253165.2U
Authority: CN
Inventors: 徐正乾; 付显栋; 李军; 郎建强; 王坤
Original assignee: Dongfang Electric Machinery Co Ltd DEC
Current assignee: Dongfang Electric Machinery Co Ltd DEC
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2023-01-06
Anticipated expiration: 2032-08-26

Abstract

The utility model discloses an auxiliary fixtures that turbogenerator's collecting ring insulating cylinder processing was used belongs to turbogenerator assembly technical field, including cylindrical axle body, one of them side of axle body is the fitting surface, and the middle part of fitting surface is equipped with the boss, the fitting surface is equipped with the cooperation inclined plane with the periphery connecting portion of axle body, all be equipped with hoist and mount screw I on two sides of axle body, be equipped with hoist and mount screw II in the periphery of axle body, it is numerous and diverse to have solved among the prior art processing collecting ring insulating cylinder process, and the precision is not high, the problem of processing difficulty.

Description

Auxiliary tool for machining collecting ring insulating cylinder of steam turbine generator

Technical Field

The utility model belongs to the technical field of turbo generator assembly, concretely relates to auxiliary fixtures of turbo generator's processing of collecting ring insulating cylinder usefulness.

Background

The turbonator collecting ring insulating cylinder is a cylindrical insulating material positioned between the rotor collecting ring and the rotating shaft. When the motor rotor is assembled, the collecting ring insulating cylinder is sleeved on the rotating shaft, then the collecting ring is sleeved on the insulating cylinder, and the insulating cylinder plays a role in preventing the collecting ring from being grounded (namely the collecting ring is conducted with the rotating shaft). Because the rotor is a rotating part, certain tightening requirements are required between the insulating cylinder and the rotating shaft, between the collecting ring and the insulating cylinder, and the insulating cylinder belongs to an interference fit structure, the size, roundness and concentricity of the inner circle and the outer circle of the insulating cylinder must be strictly controlled during processing of the insulating cylinder, and the assembling requirements of the turbonator can be met.

When a collecting ring insulating cylinder of an existing steam turbine generator is processed, the method generally adopted is as follows: manufacturing a tooling plug, sleeving the end part of one side of a blank of the insulating cylinder, clamping the plug by a lathe, then processing the inner circle and the outer circle of the insulating cylinder of the collecting ring, cold-pressing a sleeve shaft of the insulating cylinder of the collecting ring after the insulating cylinder of the collecting ring is processed, and processing the outer circle of the collecting ring according to the size of the sleeve shaft of the insulating cylinder of the collecting ring. This method has the following problems:

1. when the collecting ring insulating cylinder is machined, only one end (provided with a plug) of the collecting ring insulating cylinder is clamped, the suspended section of the collecting ring insulating cylinder is longer, and the collecting ring insulating cylinder is a thin-walled part, so that a certain deformation amount exists in the clamping and fixing mode, and the roundness and coaxiality of the inner circle and the outer circle of the collecting ring insulating cylinder cannot be accurately controlled and guaranteed during machining;

2. because the collector ring insulating cylinder is a thin-walled piece which is easy to deform, the feed amount is small when the collector ring insulating cylinder is processed, and the processing speed is low;

3. after the processing is finished, when the excircle of the insulating cylinder needs to be measured, the excircle is also inaccurately measured due to certain deformation of the thin-wall part;

4. because the machining size of the collector ring insulating cylinder is difficult to control and measure, the size of the outer circle of the rear sleeve shaft of the collector ring insulating cylinder is not uniform, and each collector ring needs to be subjected to finish machining according to the actual measurement size of the corresponding insulating cylinder.

Therefore, the collector ring insulating cylinder processed by adopting the prior art has the disadvantages of complex process, low precision and high production cost.

SUMMERY OF THE UTILITY MODEL

The utility model discloses it is numerous and diverse to aim at solving among the prior art processing collecting ring insulating cylinder process, and the precision is not high, and the problem of processing difficulty provides a turbo generator's collecting ring insulating cylinder processing auxiliary fixtures usefulness, can effectively solve aforementioned problem.

In order to achieve the above purpose, the technical solution of the present invention is as follows:

the utility model provides an auxiliary fixtures that turbonator's collecting ring insulating cylinder processing was used, includes cylindrical axle body, one of them side of axle body is the fitting surface, and the middle part of fitting surface is equipped with the boss, the fitting surface is equipped with the cooperation inclined plane with the periphery connecting portion of axle body, all be equipped with hoist and mount screw I on two sides of axle body, be equipped with hoist and mount screw II in the periphery of axle body.

Further, the depth of the boss is not less than 5mm.

Furthermore, the shaft body is a solid cylinder, and center holes are formed in the center parts of two side surfaces of the shaft body.

Furthermore, a set of hoisting screw holes I are respectively arranged on two side faces of the shaft body, each set of hoisting screw holes I comprises four hoisting screw holes I, and the four hoisting screw holes I are uniformly distributed on the side face of the shaft body.

Further, keep away from set up a set of hoist and mount screw II on the periphery of fitting surface one side, a set of hoist and mount screw II includes eight hoist and mount screw II, and eight hoist and mount screw II equipartitions are on the periphery of axle body.

Further, the shaft body is a cylindrical body with a hollow inner part or a cylindrical body with a hollow middle part.

Further, the matching surface is a contact surface with the roughness of 1.6.

The utility model has the advantages that:

1. the utility model discloses in, the auxiliary fixtures who adopts this structure can support the collecting ring insulating cylinder in being used for the processing operation of collecting ring insulating cylinder, the processing operation of being convenient for. The roundness and concentricity of the inner circle and the outer circle of the collector ring insulating cylinder machined by the auxiliary tool are not influenced by the deformation of the thin-wall part any more, and the dimensional precision of a product can be well controlled; meanwhile, the size measurement of the inner circle and the outer circle is not influenced by the deformation of the thin-wall part any more, the measurement is more convenient, and the measurement result is more accurate; the dimensional tolerance of the rear excircle of the sleeve shaft can be controlled within 0.05mm, so that the inner circle matching processing procedure of the product collecting ring is eliminated, and the project period and the cost are reduced; and the processing and measuring method is simple and convenient, and has low requirements on the skills of operators and inspectors.

2. The utility model discloses in, the degree of depth of boss is not less than 5mm, avoids when auxiliary fixtures is vertical to be placed, damages the fitting surface

3. The utility model discloses in, the centre bore is used for this auxiliary fixtures's quick alignment.

4. The utility model discloses in, respectively be equipped with a set of hoist and mount screw I on two sides of axle body, every group hoist and mount screw I includes four hoist and mount screw I, and four hoist and mount screw I equipartitions are convenient for lift by crane work on the side of axle body, can be used to the frock screw rod when adorning the collecting ring insulating cylinder.

5. In the utility model, a group of hoisting screw holes II are arranged on the periphery of one side far away from the matching surface, the group of hoisting screw holes II comprises eight hoisting screw holes II, and the eight hoisting screw holes II are uniformly distributed on the periphery of the shaft body, so that the hoisting work in the transverse direction is facilitated on one hand; on the other hand, when the collecting ring insulating cylinder and the auxiliary tool slide relative to each other during processing, the insulating cylinder can be pressed in the hole by a pressing plate.

6. In the utility model, the shaft body is a hollow cylindrical body, so that the use of materials is reduced. If the problem of convenient processing is considered, the hollow cylindrical structure in the middle can be designed.

7. The utility model discloses in, the fitting surface is the contact surface that roughness is 1.6, reaches better contact effect, avoids taking place relative slip between the contact surface, influences the machining precision.

Drawings

Fig. 1 is a longitudinal section schematic diagram of the auxiliary tool of the present invention.

Fig. 2 is an enlarged view of a portion a of fig. 1.

Fig. 3 is a right side view of fig. 1.

Fig. 4 is a longitudinal sectional view of an auxiliary tool according to another embodiment.

Fig. 5 is a right side view of fig. 4.

FIG. 6 is a view of the face of a boss of a shaft body of yet another embodiment.

Fig. 7 is a longitudinal sectional view schematically showing an auxiliary tool according to still another embodiment.

Fig. 8 is a schematic view of the slip ring insulating cylinder on the dismounting auxiliary tool.

Fig. 9 is a structural schematic diagram of the slip ring insulation cylinder assembled on the rotating shaft.

Wherein, 1, the shaft body; 2. a mating surface; 3. a boss; 4. an outer periphery; 5. a mating bevel; 6. hoisting the screw hole I; 7. hoisting a screw hole II; 8. a central bore; 9. assembling and disassembling the insulating cylinder tool; 10. a jack; 11. a collector ring insulating cylinder; 12. auxiliary tools; 13. a collector ring; 14. a rotating shaft.

Detailed Description

The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.

Example 1

The embodiment is the simplest implementation mode, and the auxiliary tool for machining the collector ring insulating cylinder of the steam turbine generator comprises a cylindrical shaft body 1 and reference drawings 1-3, wherein one side surface of the shaft body 1 is a fitting surface 2, the fitting surface 2 is matched with the periphery 4 of the shaft body 1 to serve as a clamping benchmark of the shaft body 1, the workpiece is aligned when the collector ring insulating cylinder is machined, a boss 3 is arranged in the middle of the fitting surface 2, the boss 3 can be used for protecting the datum surface from being damaged or abraded when the auxiliary tool is vertically placed, the machining precision of the fitting surface 2 and the periphery 4 is guaranteed when the fitting surface 2 and the periphery 4 are in contact with the collector ring insulating cylinder, a matching inclined surface 5 is arranged at a connecting part of the fitting surface 2 and the periphery 4 of the shaft body 1, the assembly and the alignment are convenient, hoisting screw holes I6 are arranged on two side surfaces of the shaft body 1, a hoisting screw hole II7 is arranged on the periphery 4 of the shaft body 1, and the hoisting screw holes I6 and the hoisting screw hole II7 are convenient for hoisting of the auxiliary tool.

Example 2

The embodiment is further optimized in embodiment 1, and the difference is that the depth of the boss 3 is not less than 5mm, so that the clamping requirements of the shaft body 1 and the collector ring insulating cylinder can be met, and the auxiliary tool can be conveniently placed vertically to protect the reference surface from being damaged or abraded.

Example 3

Compared with the embodiment 1-2, the difference of this embodiment is that the shaft body 1 is a solid cylinder, the central portions of two side surfaces of the shaft body 1 are provided with central holes 8, referring to fig. 4-5, the central holes 8 are for facilitating clamping and alignment during processing, and although alignment can be performed according to the periphery 4 and the matching surface 2, alignment using the central holes 8 is more convenient.

Example 4

Compared with the embodiment 1-3, the difference of this embodiment lies in that two side surfaces of the shaft body 1 are respectively provided with a group of hoisting screw holes I6, each group of hoisting screw holes I6 includes four hoisting screw holes I6, and the four hoisting screw holes I6 are uniformly distributed on the side surface of the shaft body 1. Referring to fig. 4-5, the auxiliary tool is used for hoisting work when the auxiliary tool is vertically placed, and in addition, the auxiliary tool can be used for screwing the tool when the collector ring insulating cylinder is installed.

Example 5

Compared with the embodiment 1-4, the present embodiment has the difference that a group of hoisting screw holes II7 is provided on the periphery 4 of the side far away from the fitting surface 2, the group of hoisting screw holes II7 includes eight hoisting screw holes II7, and referring to the auxiliary tool 12 of fig. 8, the eight hoisting screw holes II7 are uniformly distributed on the periphery 4 of the shaft body 1. The purpose of design hoist and mount screw II7 has two: firstly, the transverse hoisting device can be used for hoisting operation; secondly, when in processing, if the collecting ring insulating cylinder 11 and the auxiliary tool 12 slide relatively, the insulating cylinder can be pressed tightly in the hole by a pressing plate

Example 6

Compared with the embodiments 1 to 5, the present embodiment is different in that the shaft body 1 is a cylindrical body with a hollow inside, and on the premise that the shaft body 1 meets the requirement of processing strength, the shaft body 1 can be designed into a cylindrical body with a hollow inside structure, refer to fig. 7 or a cylindrical body with a hollow middle part, refer to fig. 6.

Example 7

This example is different from examples 1 to 6 in that the mating surface 2 is a contact surface having a roughness of 1.6.

Example 8

This embodiment further describes the technical solution by taking an auxiliary tool used when the company produces a steam turbine generator collector ring insulation cylinder as an example.

In the scheme, the auxiliary tool is adopted to replace an actual rotating shaft, the assembly state of the insulating cylinder is simulated, the uniformity of the final assembly size is ensured, the production period of the product is saved, and the production cost is reduced. The auxiliary tool is structurally as follows:

auxiliary fixtures includes solid columnar axle body 1, refer to fig. 2, 4, 5, one of them side of axle body 1 is fitting surface 2, and the middle part of fitting surface 2 is equipped with boss 3, fitting surface 2 is equipped with cooperation inclined plane 5 with 4 connecting portions in the periphery of axle body 1, respectively be equipped with a set of hoist and mount screw I6 on two sides of axle body 1, every hoist and mount screw I6 of group includes four hoist and mount screw I6, and four hoist and mount screw I6 equipartitions are on the side of axle body 1. Keep away from set up a set of hoist and mount screw II7 on the periphery 4 of fitting surface 2 one side, a set of hoist and mount screw II7 includes eight hoist and mount screw II7, and eight hoist and mount screw II7 equipartitions are on the periphery 4 of axle body 1.

In this embodiment, the depth of the boss 3 is 5mm, the central portions of two side surfaces of the shaft body 1 are provided with central holes 8, and the matching surface 2 is a contact surface with a roughness of 1.6.

In the embodiment, an auxiliary tool is machined and manufactured according to the size of an actual collector ring insulating cylinder, when the size of the outer periphery 4 of a shaft body 1 of the auxiliary tool is designed, the size of the outer periphery is 0.08 to 0.1mm larger than the inner circle of the insulating cylinder, namely, the interference fit between the auxiliary tool and the collector ring insulating cylinder is ensured, the tightness is 0.08 to 0.1mm, and meanwhile, the contact surfaces of a matching surface 2 and the outer periphery 4 are controlled to have the roughness of 1.6, and the form and position tolerance requirements of the matching surface 2 and the outer periphery 4 are controlled.

When in use, the first step is as follows: and sleeving the collector ring insulating cylinder 11 with the inner circle machined on an auxiliary tool, and putting the collector ring insulating cylinder and the auxiliary tool on a lathe together. When the collecting ring insulating cylinder 11 is sleeved, the collecting ring insulating cylinder 11 is sleeved on the auxiliary tool 12 by using the insulating cylinder assembling and disassembling tool 9, and when the collecting ring insulating cylinder 11 is sleeved, the jacks 10 on the two sides are noticed to synchronously apply pressure, and the attached figure 8 is referred to, so that the collecting ring insulating cylinder 11 is prevented from being damaged due to uneven stress;

the second step is that: after the collector ring insulating cylinder (with an auxiliary tool) is turned on a lathe, the periphery 4 and the matching surface 2 of the auxiliary tool 12 are aligned (the matching surface 2 and the periphery 4 are required to jump within 0.03 mm), the periphery 4 to phi D2 of the matching gear of the collector ring insulating cylinder 11 is machined, and the sizes of the rest positions are unchanged. After the machining is finished, actually measuring and recording the excircle dimension phi D2;

the third step: the collecting ring insulating cylinder 11 is separated from the auxiliary tool 12 by using an insulating cylinder assembling and disassembling tool 9 in the same way as the insulating cylinder sleeve method in the first step;

the fourth step: after the collector ring insulating cylinder 11 is finished and qualified in inspection, the collector ring insulating cylinder 11 is sleeved on the product rotating shaft 14 by using the insulating cylinder mounting and dismounting tool 9 similarly, and refer to the figure 9.

The auxiliary tool for use in the scheme has the advantages of ingenious and simple structure and high stability, can effectively overcome the defects that a thin-wall part obtained by a traditional processing mode is easy to deform, the inner circle and the outer circle are not concentric, and the wall thickness is not uniform, and can protect the reference surface from being damaged or abraded due to the design of the boss 3.

Claims

1. The utility model provides an auxiliary fixtures that turbonator's collecting ring insulating cylinder processing was used which characterized in that: including cylindrical axle body (1), one of them side of axle body (1) is fitting surface (2), and the middle part of fitting surface (2) is equipped with boss (3), fitting surface (2) are equipped with cooperation inclined plane (5) with periphery (4) connecting portion of axle body (1), all be equipped with hoist and mount screw I (6) on two sides of axle body (1), be equipped with hoist and mount screw II (7) on periphery (4) of axle body (1).

2. The auxiliary tool for machining the collector ring insulation cylinder of the steam turbine generator as claimed in claim 1, is characterized in that: the depth of the boss (3) is not less than 5mm.

3. The auxiliary tool for machining the collector ring insulation cylinder of the steam turbine generator as claimed in claim 1, is characterized in that: the shaft body (1) is a solid cylinder, and center holes (8) are formed in the center parts of two side faces of the shaft body (1).

4. The auxiliary tool for machining the collector ring insulation cylinder of the steam turbine generator as claimed in claim 1, is characterized in that: a set of hoisting screw holes I (6) are respectively arranged on two side faces of the shaft body (1), each set of hoisting screw holes I (6) comprises four hoisting screw holes I (6), and the four hoisting screw holes I (6) are uniformly distributed on the side face of the shaft body (1).

5. The auxiliary tool for machining the collector ring insulation cylinder of the steam turbine generator as claimed in claim 1, is characterized in that: keep away from set up a set of hoist and mount screw II (7) on periphery (4) of fitting surface (2) one side, a set of hoist and mount screw II (7) include eight hoist and mount screw II (7), and eight hoist and mount screw II (7) equipartitions are on periphery (4) of axle body (1).

6. The auxiliary tool for machining the collector ring insulation cylinder of the steam turbine generator as claimed in claim 1, is characterized in that: the shaft body (1) is a cylindrical body with a hollow inner part or a cylindrical body with a hollow middle part.

7. The auxiliary tool for machining the collector ring insulation cylinder of the steam turbine generator as claimed in claim 1, is characterized in that: the matching surface (2) is a contact surface with the roughness of 1.6.