阅读说明：本技术 一种可调式压装底座及安装方法 (Adjustable press-fitting base and installation method ) 是由 茅邓华 韩华齐 刘雷 吴骏巍 丁辉 苏旻佳 于 2019-09-26 设计创作，主要内容包括：本发明提供了一种可调式压装底座及安装使用方法，属于汽轮发电机技术领域。包括底板、支撑立柱、绝缘垫板、千斤顶结构、挡风板加热管口、导风板和挡风板；通过调整压装底座的底板上支撑立柱的位置，以满足不同电机定子铁心压装的使用需求。压装底座可以增加风道结构，将加热方式从定子铁心的顶部开始加热移到下部开始加热，操作便利，保证了铁心的绝缘安全性。该结构的应用可降低产品开发的工装成本与仓储压力，提升了定子铁心在热压过程中的绝缘安全性，结构合理，使用安全可靠。(The invention provides an adjustable press-fitting base and an installation and use method thereof, and belongs to the technical field of turbonators. The device comprises a bottom plate, a supporting upright post, an insulating base plate, a jack structure, a wind shield heating pipe orifice, a wind deflector and a wind shield; the use requirements of press fitting of stator cores of different motors are met by adjusting the positions of the supporting stand columns on the bottom plate of the press fitting base. The press-fitting base can be additionally provided with an air channel structure, the heating mode is moved from the top of the stator core to the lower part of the stator core, the operation is convenient, and the insulation safety of the core is ensured. The application of the structure can reduce the tooling cost and the storage pressure of product development, improves the insulation safety of the stator core in the hot pressing process, and has reasonable structure and safe and reliable use.)

1. The utility model provides a pressure equipment base with adjustable which characterized in that: comprises a bottom plate (1), a supporting upright post (2), an insulating base plate (3), a jack structure (4), a wind shield heating pipe orifice (5), a wind deflector (6) and a wind shield (15); a plurality of groups of connecting screw holes are formed in the bottom plate (1), and the supporting upright posts (2) are fixedly connected with the bottom plate (1) through the connecting screw holes; an insulating base plate (3) is arranged on the top end face of the supporting upright post (2); a jack structure (4) is arranged between the adjacent supporting upright columns (2); the periphery of the supporting upright post (2) is provided with a wind shield (15), and a wind shield heating pipe orifice (5) is arranged on the wind shield (15); the center of the bottom plate (1) is provided with an air deflector (6), and the air deflector (15) and the air deflector (6) are connected to form an air duct structure.

2. An adjustable press-fitting base as claimed in claim 1, wherein: the air guide surface formed by the air guide plate (6) corresponds to the bottom end surfaces of the air deflector heating pipe opening (5) and the iron core end part (12).

3. An adjustable press-fitting base as claimed in claim 1, wherein: the bottom end face of the supporting upright post (2) is provided with a flange face and a through hole, and the position of the through hole corresponds to the position of the connecting screw hole on the bottom plate (1).

4. An adjustable press-fitting base as claimed in claim 1, wherein: the jack structure (4) is arranged between the supporting upright post (2) and avoids a supporting rib fastening structure (7) and a penetrating screw fastening structure (8) on the bottom end face of the iron core end part (12).

5. An adjustable press-fitting base as claimed in claim 1, wherein: the wind shield (15) is arranged on the periphery of the support upright post (2) to form a continuous inward spiral annular surrounding air duct structure vertical to the bottom plate (1); the wind shield (15) forms the side wall of the air duct structure.

6. An adjustable press-fitting base as claimed in claim 1, wherein: the upper end surface of the supporting upright post (2) is provided with a notch.

7. An adjustable press-fitting base installation and use method is characterized by comprising the following steps:

step 1: according to different generator products, the screw hole position identification on the bottom plate is found.

Step 2: the supporting upright posts (2) are arranged on the bottom plate (1) one by one according to corresponding positions and are fixed by bolts, a circle of supporting upright posts (2) are arranged on the bottom plate (1) in a circumferential mode, and an air deflector (6) is arranged in the center of the bottom plate (1).

And step 3: and placing the insulating base plate (3) on the upper end face of the support upright post (2), and then starting the lamination work of the stator core.

And 4, step 4: after the stator cores are completely stacked, hot pressing is required. The jack structure (4) is sequentially placed on the bottom plate (1) and is respectively positioned between the two supporting upright columns (2), the supporting rib fastening structure (7) and the penetrating screw fastening structure (8) at the end part of the stator core are avoided, and the upper cushion block of the jack structure is used for jacking the lower end face of the stator core.

And 5: the wind shield (15) is arranged on the support upright post (2), and the wind shield (15) and the wind deflector (6) are connected to form an air duct structure; the air guide surface formed by the air guide plate (6) corresponds to the bottom end surfaces of the heating pipe opening (5) of the air deflector and the end part of the iron core.

Step 6: the heating pipe opening (5) of the wind shield is connected with a heating pipe, a cable is connected, and the iron core is pressurized and heated to complete the hot-pressing operation of the stator iron core.

Technical Field

The invention relates to an adjustable press-fitting base and an installation method, and belongs to the technical field of steam turbine generators.

Background

The press-fitting base is used for the external press-fitting manufacturing process of the stator core of the turbonator. The press-fitting base serves as a bearing platform, the stator core is gradually stacked and pressurized on the bearing platform until the final manufacturing of the core is completed, and the structure of the press-fitting base needs to have higher structural strength so as to bear the pressurization pressure of the core. As shown in fig. 1, which is a schematic view of press-fitting of a stator core used at present, an end face of the stator core is directly placed on an upper end face of a press-fitting base 9, and the larger the contact surface between the stator core and the press-fitting base is, the better the contact surface is, so that the stator core is uniformly stressed in a pressing process. The press-fitting base has a certain height, and the purpose of the press-fitting base is 1) that the lower part of the end face of the iron core has enough space for installing a pressing device 14, a hydraulic oil cylinder 16 and other pressing facilities; 2) and enough space is reserved for an operator to enter the lower end of the iron core from the bottom so as to position and tighten the iron core structure. As shown in fig. 2, which is a schematic view of a stator core structure, a bottom end surface of a core end 12 is provided with a support rib fastening structure 7 and a through screw fastening structure 8. As shown in fig. 3, when the iron core end 12 is placed on the press-fitting base 9, the press-fitting base 9 needs to be provided with corresponding notches, i.e., a supporting rib avoiding notch 10 and a penetrating screw avoiding notch 11, so as to avoid the supporting rib fastening structure 7 and the penetrating screw fastening structure 8, and avoid installation interference.

Because the pitch circle and the number of the supporting ribs of different products are different from those of the through screw, different notches need to be formed in the press mounting base according to different products, and universal notch arrangement cannot be realized, so that almost every product needs to be provided with a press mounting base 9 structure, and great burden is brought to the development cost and the development cycle of a new product. In addition, as shown in fig. 4, the stator core needs to be pressurized in a heated state, and the heating pipe orifice 19 of the existing press-fitting base structure is connected to the top of the core, so that the heating pipe 17, the cable 18 and other facilities need to be lapped on the core (the heating pipe 17 and the cable 18 need to take insulation measures), which brings certain potential safety hazard to the insulation protection of the stator core. Therefore, the technical problem of structural defects of the bearing platform for the stator core press-fitting operation of the steam turbine generator at present is urgently needed to be overcome in the technical field.

Disclosure of Invention

The invention aims to solve the technical problems of low utilization rate of a bearing platform, high cost and single function in the existing steam turbine generator stator core press-fitting operation. Because the pitch circle and the number of the supporting ribs of different turbonator stator core products are different from the pitch circle and the number of the penetrating screw rods, different notches need to be formed in the press-fitting base according to different products, and universal notch arrangement cannot be realized, so that almost every product needs to be matched with a press-fitting base structure, and great burden is brought to the development cost and the development period of a new product. Now that the mode of seting up general type breach arrangement is feasible on an overall structure, consider the permutation and combination mode with a plurality of support posts so, piece up a contact surface, contact with stator core tip, can guarantee the effective area of contact of pressure equipment base and core tip, can dodge open the brace rod fastening structure and the penetrating screw rod fastening structure of core tip again completely, can also realize adjustable function, satisfy the installation demand of different products.

In order to solve the above problems, the technical solution adopted by the present invention is to provide an adjustable press-fitting base, which is characterized in that: the device comprises a bottom plate, a supporting upright post, an insulating base plate, a jack structure, a wind shield heating pipe orifice, a wind deflector and a wind shield; a plurality of groups of connecting screw holes are formed in the bottom plate, and the supporting upright posts are fixedly connected with the bottom plate through the connecting screw holes; an insulating base plate is arranged on the top end face of the supporting upright post; a jack structure is arranged between the adjacent supporting upright columns; the periphery of the supporting upright post is provided with a wind shield, and a wind shield heating pipe orifice is arranged on the wind shield; the center of the bottom plate is provided with an air deflector, and the air deflector is connected with the air deflector to form an air duct structure.

Preferably, the air guide surface formed by the air guide plate corresponds to the bottom end surfaces of the heating pipe orifice of the air deflector and the end part of the iron core.

Preferably, the bottom end face of the supporting upright post is provided with a flange face and a through hole, and the position of the through hole corresponds to the position of the connecting screw hole on the bottom plate.

Preferably, the jack structure is arranged between the support upright post and the support upright post, and avoids the support rib fastening structure and the penetrating screw rod fastening structure on the bottom end face of the end part of the iron core.

Preferably, the wind deflector is arranged on the periphery of the support upright post to form a continuous inward spiral annular surrounding air duct structure vertical to the bottom plate; the wind shield forms the side wall of the air duct structure.

Preferably, the upper end surface of the supporting upright post is provided with a notch.

The invention also provides an installation and use method of the adjustable press-fitting base, which is characterized by comprising the following steps:

step 1: according to different generator products, the screw hole position identification on the bottom plate is found.

Step 2: the supporting upright posts are arranged on the bottom plate one by one according to corresponding positions and are fixed by bolts, a circle of supporting upright posts are arranged on the bottom plate in a circumferential mode, and an air deflector is arranged in the center of the bottom plate.

And step 3: and placing an insulating base plate on the upper end surface of the supporting upright post, and then starting the lamination work of the stator core.

And 4, step 4: after the stator cores are completely stacked, hot pressing is required. The jack structure is sequentially placed on the bottom plate and is respectively positioned between the two supporting stand columns, the supporting rib fastening structure and the penetrating screw fastening structure at the end part of the stator core are avoided, and the upper cushion block of the jack structure is tightly pressed against the lower end face of the stator core.

And 5: the wind shield is arranged on the supporting upright post and connected with the wind deflector to form an air duct structure; the wind guide surface formed by the wind guide plate corresponds to the wind shield heating pipe orifice and the bottom end surface of the iron core end part.

Step 6: the heating pipe is connected with the heating pipe of the wind shield, the cable is connected, and the iron core is pressurized and heated to complete the hot-pressing operation of the stator iron core.

Compared with the prior art, the invention has the following beneficial effects:

1. the adjustable supporting upright posts are adopted to form the bearing platform for press mounting of the stator core, so that the size requirements of different generator products are met.

2. The invention forms an air duct structure by adding the wind shield (with the heating pipe connecting port), and moves the installation position of the heating facility from the top to the lower part of the stator core, thereby completely isolating the heating facility from the stator core and greatly improving the insulation safety of the heating facility.

3. The invention has the advantages of universality, safety, economy and high efficiency, reduces the tooling cost and the storage pressure of product development, and improves the insulation safety of the stator core in the hot pressing process.

4. The invention has reasonable structure and safe and reliable use.

Drawings

Fig. 1 is a schematic view of a conventional stator core press-fitting structure.

Fig. 2 is a schematic view of a stator core structure.

Fig. 3 is a schematic view of a conventional stator core press-fitting and bearing platform.

Fig. 4 is a layout diagram of a heating pipeline during hot pressing of a stator core.

Fig. 5 is a schematic structural view of the press-fitting base of the present invention.

Fig. 6 is a schematic view of the avoiding effect of the section of the joint of the press-fitting base and the end of the iron core.

Fig. 7 is a schematic diagram of a universal effect support column of the press-fitting base structure of the present invention, wherein a gap is formed on the upper end surface of the support column.

Fig. 8 is a schematic view of the whole structure of the stator core press-fitting after the press-fitting base is adopted.

Reference numerals: 1. the bottom plate 2, the supporting upright post 3, the insulating base plate 4, the jack structure 5, the wind shield heating pipe orifice 6, the wind shield 7, the supporting rib fastening structure 8, the penetrating screw fastening structure 9, the press-mounting base 10, the supporting rib avoiding gap 11, the penetrating screw avoiding gap 12, the iron core end 13, the bottom plate threaded hole 14, the pressurizing press tool 15, the wind shield 16, the hydraulic oil cylinder 17, the heating pipe 18, the cable 19, the heating pipe orifice 20, the supporting upright post gap

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings, as shown in fig. 1, 2, 3 and 4, which are schematic press-fitting diagrams of stator cores currently used. The end face of the stator core is provided with a protruded supporting rib fastening structure 7 and a piercing screw fastening structure 8, the end face of the stator core is placed on a press-fitting base 9, and corresponding gaps, namely a supporting rib avoiding gap 10 and a piercing screw avoiding gap 11, are required to be formed in the press-fitting base 9 so as to avoid installation interference.

As shown in fig. 5, 6, 7 and 8, the adjustable press-fitting base provided by the invention comprises a base plate 1, a support upright 2, an insulating base plate 3, a jack structure 4, a wind shield heating pipe orifice 5, a wind deflector 6 and a wind shield 15; the bottom plate 1 is provided with a plurality of groups of connecting threaded holes 13, the bottom plate 1 is made of a common carbon steel plate, threaded through holes 13 are formed in the bottom plate 1, four threaded holes are in a group, a plurality of groups of uniformly distributed threaded holes are formed in the circumference of the bottom plate 1, a circle of threaded hole group is formed, the number and the positions of the groups are determined according to different products, a circle of threaded holes 13 are formed for different products, and product identification is carried out. The supporting upright post 2 is fixedly connected with the bottom plate 1 through a connecting threaded hole 13; the supporting upright column 2 is made of a high-strength low-carbon alloy steel plate, and four through holes are formed in the flange face of the bottom end face of the supporting upright column and correspond to the threaded holes 13 in the base plate 1. The side surface of the wind shield is also provided with a threaded hole for installing and connecting the wind shield 15. An insulating base plate 3 is arranged on the top end face of the supporting upright post 2, the insulating base plate 3 is made of an epoxy glass cloth plate and is placed on the upper end face of the supporting upright post 2, and the press-fitting base and the stator core are isolated. And a jack structure 4 is arranged between the adjacent supporting upright columns 2, the jack structure 4 consists of a jack and upper and lower insulating cushion blocks, is arranged between the supporting upright columns 2 and avoids a supporting rib fastening structure 7 and a penetrating screw rod fastening structure 8 which are arranged at the end part 12 of the stator core. The periphery of the supporting upright post 2 is provided with a wind shield 15, and a wind shield heating pipe opening 5 is arranged on the wind shield 15. The wind shield 15 is arranged on the periphery of the support upright post 2 to form a circle of continuous inward spiral annular surrounding air channel structure vertical to the bottom plate 1, the center of the bottom plate 1 is provided with the air deflector 6, and the wind shield 15 and the air deflector 6 are connected to form an air channel structure; the wind guide surface formed by the wind guide plate 6 corresponds to the wind shield heating pipe orifice 5 and the bottom end surface of the iron core end part 12. The wind shield is provided with a cable penetrating port, and the wind shield 15 forms the side wall of the closed air duct structure.

In order to make the press-fitting base universal and be suitable for the installation of different stator cores, the support rib fastening structure 7 and the penetrating screw fastening structure 8 at the end part 12 of the stator core are avoided, and the support upright 2 can adopt a support upright notch 20 form to avoid installation interference.

The specific use and installation method of the invention is as follows:

step 1: according to different generator products, the screw hole position identification on the bottom plate 1 is found.

Step 2: the supporting upright posts 2 are arranged on the bottom plate 1 one by one according to corresponding positions and fixed by bolts, a circle of supporting upright posts 2 is formed on the bottom plate and arranged circumferentially, and an air deflector 6 is arranged in the center of the bottom plate 1.

And step 3: an insulating shim plate 3 is placed on the upper end face of the support column 2, and then the stator core stacking work is started.

And 4, step 4: after the stator cores are completely stacked, hot pressing is required. The jack structure 4 is sequentially placed on the bottom plate 1 and respectively positioned between the two supporting upright posts 2, the supporting rib fastening structure 7 and the penetrating screw fastening structure 8 at the end part of the stator core are avoided, and the upper cushion block of the jack structure is tightly propped against the lower end face of the stator core.

And 5: the wind shield 15 is arranged on the support upright post 2, and the wind shield 15 and the wind deflector 6 are connected to form an air channel structure; the wind guide surface formed by the wind guide plate 6 corresponds to the wind shield heating pipe orifice 5 and the bottom end surface of the iron core end part 12.

Step 6: the heating pipe opening 5 of the wind shield is connected with a heating pipe, a cable is connected, the iron core is pressurized and heated, and the hot-pressing operation of the stator iron core is completed.

While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.