CN221942927U - Super-bolt structure for installation of power generator matched with aviation remodel combustion engine - Google Patents

Abstract

The utility model provides a super-bolt structure for installing a generator matched with an aero-retrofit gas turbine, which comprises a large nut, a long bolt, a tensioning block, an installation base and a generator base, wherein the generator base is arranged above the installation base, the two installation holes are correspondingly formed in the generator base, the long bolt penetrates through the two installation holes, both ends of the long bolt extend to the outer sides of the installation holes, the large nut is in threaded connection with the upper end of the long bolt, the tensioning block is in threaded connection with the lower end of the long bolt, a gap exists between the tensioning block and the installation base, a plurality of small bolts are arranged on the tensioning block, and the upper ends of the small bolts are in tight fit with the installation base. The utility model has simple structure, reliable connection and convenient operation, only needs to use a small spanner matched with a small bolt when in screwing, greatly reduces the operation space requirement, has much smaller screwing force and saves more labor; correspondingly, the design size and weight of the generator can be smaller, the product cost is reduced, and better economic benefits are achieved.

Description

Super bolt structure for installing generators supporting aero-derivative gas turbines

Technical Field

The utility model relates to the field of aero-derivative gas turbine generators, and in particular to a super bolt structure for installing a generator matched with an aero-derivative gas turbine.

Background Art

The aeroderivative gas turbine generator set consists of an aeroderivative gas turbine and a generator. During the product assembly and testing stages, the generator needs to be installed on a mounting base. Eight connection points are set on the generator base. The usual connection method is to use a conventional bolt assembly, including two nuts, a bolt, two flat washers and a spring washer. To ensure the reliability of the connection, it is necessary to use a larger wrench matching the nut to tighten it. However, due to the compact structure of the existing generator, the operating space of the wrench cannot be met, that is, the installation of the generator cannot be completed. At this time, in order to complete the connection, it is necessary to increase the design space of the generator, which not only increases the size and weight of the generator, but also increases the product design cost, production cost and installation cost.

It can be seen that the existing technology cannot meet the installation requirements of the generator supporting the aeroderivative gas turbine. Therefore, it is necessary to provide a super bolt structure for installing the generator supporting the aeroderivative gas turbine to reduce the installation space requirements.

Utility Model Content

In view of the defects in the prior art, the purpose of the utility model is to provide a super bolt structure for installing a generator supporting an aero-derivative gas turbine.

According to the utility model, a super bolt structure for installing an aero-derivative gas turbine supporting generator comprises: a large nut, a long bolt, a tensioning block, a mounting base and a generator base, wherein the generator base is arranged above the mounting base, and mounting holes are correspondingly opened on the two, the long bolt passes through the two mounting holes, and both ends extend to the outside of the mounting holes, the large nut is threadedly connected to the upper end of the long bolt, the tensioning block is threadedly connected to the lower end of the long bolt, and there is a gap between the tensioning block and the mounting base, and a plurality of small bolts are arranged on the tensioning block, and the upper ends of the small bolts are tightly fitted with the mounting base.

Preferably, the length of the long bolt extending to the outside is 1.5 times the thread pitch of the long bolt.

Preferably, an upper gasket is provided between the large nut and the generator base, the upper gasket is sleeved on the long bolt, and fits with the upper surface of the generator base and the lower surface of the large nut.

Preferably, a lower gasket is provided between the tension block and the mounting base, the lower gasket is sleeved on the long bolt and fits with the lower surface of the mounting base, and there is a gap between the lower gasket and the upper surface of the tension block.

Preferably, the gap between the tension block and the lower surface of the lower gasket is 0.5 times the pitch of the long bolt.

Preferably, the gap between the tension block and the lower surface of the lower pad is not less than 2 to 3 mm.

Preferably, the outer diameter of the small bolt is smaller than the outer diameter of the long bolt.

Preferably, a plurality of the small bolts are evenly arranged around the long bolt.

Preferably, four small bolts are provided on the tensioning block.

Preferably, the long bolt passes through the generator base from the bottom of the mounting base upward.

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

The utility model discloses to tighten the small bolts in sequence by a small wrench, so that the upper end surface of the small bolt presses against the lower surface of the lower gasket, so that the gap between the lower gasket and the tension block tends to increase; because the installation position of the lower gasket remains unchanged, the tension block moves downward, thereby driving the long bolt to move downward, and finally realizes the connection between the generator base and the mounting base; the utility model has the advantages of simple structure, reliable connection and convenient operation; when tightening, only a small wrench matching the small bolt is needed, which greatly reduces the operating space requirement, and the tightening force is much smaller, which is more labor-saving; correspondingly, the design size and weight of the generator can be smaller, which reduces the product cost and has better economic benefits.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

FIG1 is a schematic diagram of a super bolt structure for installing a generator supporting an aeroderivative gas turbine according to the present invention;

FIG2 is a schematic diagram showing the principle of a super bolt structure for installing a generator supporting an aero-derivative gas turbine according to the present invention.

Reference numerals:

Large nut 1 Upper washer 2 Long bolt 3

Initial length bolt 31 Lower gasket 4 Tension block 5

Small bolt 6 Mounting base 7 Generator base 8

DETAILED DESCRIPTION

The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the utility model. These all belong to the protection scope of the utility model.

As shown in Figures 1 and 2, a super bolt structure for installing an aero-derivative gas turbine-mounted generator provided by the utility model includes: a large nut 1, a long bolt 3, a tensioning block 5, a mounting base 7 and a generator base 8. The generator base 8 is arranged above the mounting base 7, and mounting holes are correspondingly opened on the two. The long bolt 3 passes through the two mounting holes, and both ends extend to the outside of the mounting holes. The large nut 1 is threadedly connected to the upper end of the long bolt 3, the tensioning block 5 is threadedly connected to the lower end of the long bolt 3, and there is a gap between the tensioning block 5 and the mounting base 7. A plurality of small bolts 6 are arranged on the tensioning block 5, and the upper ends of the small bolts 6 are tightly fitted with the mounting base 7.

The long bolt 3 passes through the generator base 8 upward from the bottom of the mounting base 7, which reduces the installation space requirement compared to passing through from the top of the generator downward. The length of the long bolt 3 extending to the outside is 1.5 times the pitch of the long bolt 3.

An upper gasket 2 is provided between the large nut 1 and the generator base 8 . The upper gasket 2 is sleeved on the long bolt 3 and fits with the upper surface of the generator base 8 and the lower surface of the large nut 1 .

A lower gasket 4 is provided between the tension block 5 and the mounting base 7 . The lower gasket 4 is sleeved on the long bolt 3 and fits with the lower surface of the mounting base 7 , with a gap between the lower gasket 4 and the upper surface of the tension block 5 .

The gap between the tension block 5 and the lower surface of the lower gasket 4 is 0.5 times the pitch of the long bolt 3, and the minimum is 2 to 3 mm.

The outer diameter of the small bolt 6 is smaller than the outer diameter of the long bolt 3. Multiple small bolts 6 are evenly arranged on the circumference of the long bolt 3. Preferably, four small bolts 6 are arranged on the tension block 5. The small bolt 6 is much smaller than the nominal diameter of the large nut 1, and the corresponding tightening wrench required is also much smaller, which saves the required operating space. The tightening torque of the small bolt 6 is much smaller, which is more labor-saving.

During the installation process, a small wrench is used to tighten the small bolts 6 in sequence, which will cause the upper end surface of the small bolts 6 to press against the lower surface of the lower gasket 4, causing the gap to tend to increase. Since the installation position of the lower gasket 4 remains unchanged, the tensioning block 5 moves downward, thereby driving the long bolt 3 to move downward, and finally achieving a fastened connection between the long bolt 3 and the large nut 1, thereby completing the connection between the generator base 8 and the mounting base 7.

If a conventional bolt connection structure is used, large nuts 1 need to be configured at both ends of the long bolt 3. When tightening, a larger wrench matching the large nut 1 is required, which requires a correspondingly large operating space and a large tightening force. However, when adopting the technical solution of the present application, only a small wrench matching the small bolt 6 is needed for tightening, which greatly reduces the operating space requirements, the tightening force is much smaller, and it is more labor-saving; accordingly, the design size and weight of the generator can be smaller, reducing the product cost and having better economic benefits.

The assembly steps of the super bolt structure of this application are as follows:

S1: placing the generator base 8 on the upper surface of the mounting base 7, and aligning the mounting holes of the two;

S2: Insert the initial long bolt 31 from the bottom of the mounting base 7 through the hole to the top of the generator base 8, with the length of about 1.5 times the pitch of the long bolt 3;

S3: Place the upper gasket 2 through the long bolt 3 and place it just above the hole on the generator base 8;

S4: Thread the large nut 1 and the long bolt 3 together and tighten them to fit onto the upper surface of the upper gasket 2;

S5: Pass the lower gasket 4 through the long bolt 3 from below and fit it to the bottom of the hole of the mounting base 7;

S6: The tension block 5 pre-installed with four small bolts 6 is threadedly connected to the long bolt 3 and screwed until a certain gap is maintained with the lower surface of the lower gasket 4;

S7: Use a small wrench to tighten the small bolts 6 in sequence to complete the connection between the generator base 8 and the mounting base 7. During the tightening process, the gap S6 must be maintained.

The present application has a simple structure, reliable connection, and convenient operation. The operating space required to tighten the large nut 1 is converted into the operating space required to tighten the small bolt 6, which greatly reduces the installation space requirement, and the tightening torque is much smaller, which is more labor-saving. Accordingly, the design size and weight of the generator are reduced, and the product design cost, production cost and installation cost are reduced, which has good economic benefits. The present application can be applied to all structural connection positions with limited operating space, and the technology is highly popularizable.

In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims (10)

1. The utility model provides a super bolt structure of supporting generator installation usefulness of aero-retrofit gas turbine which characterized in that includes: big nut (1), stock (3), tensioning piece (5), mounting base (7) and generator base (8), generator base (8) set up the top of mounting base (7), and correspond on the two and seted up the mounting hole, stock (3) pass two the mounting hole, and both ends all extend to the outside of mounting hole, big nut (1) with the upper end threaded connection of stock (3), tensioning piece (5) with the lower extreme threaded connection of stock (3), just tensioning piece (5) with there is the clearance between mounting base (7), be provided with a plurality of little bolts (6) on tensioning piece (5), the upper end of little bolt (6) with mounting base (7) support tight fit.

2. Super-bolt structure for installation of an aero-retrofit gas turbine generator according to claim 1, characterised in that the length of the long bolt (3) extending to the outside is 1.5 times the pitch of the long bolt (3).

3. The super-bolt structure for installing an aero-retrofit gas turbine matched generator according to claim 1, wherein an upper liner (2) is arranged between the large nut (1) and the generator base (8), and the upper liner (2) is sleeved on the long bolt (3) and is attached to the upper surface of the generator base (8) and the lower surface of the large nut (1).

4. The super-bolt structure for installing an aero-retrofit gas turbine matched generator according to claim 1, wherein a lower gasket (4) is arranged between the tensioning block (5) and the installation base (7), the lower gasket (4) is sleeved on the long bolt (3), is attached to the lower surface of the installation base (7), and has a gap with the upper surface of the tensioning block (5).

5. Super-bolt structure for installation of an aero-retrofit gas turbine generator according to claim 4, characterised in that the clearance between the tensioning block (5) and the lower surface of the lower liner (4) is 0.5 times the pitch of the long bolt (3).

6. Super-bolt structure for installation of an aero-retrofit gas turbine generator according to claim 4, characterised in that the clearance between the tensioning block (5) and the lower surface of the lower liner (4) is not less than 2 to 3mm.

7. Super-bolt structure for installation of an aero-retrofit gas turbine-generator according to claim 1, characterized in that the outer diameter of the small bolt (6) is smaller than the outer diameter of the long bolt (3).

8. Super-bolt structure for installation of an aero-retrofit gas turbine-assisted generator according to claim 1, characterized in that a plurality of said small bolts (6) are uniformly arranged on the circumference side of said long bolts (3).

9. The super-bolt structure for mounting an aero-retrofit gas turbine-assisted generator according to claim 1, wherein four small bolts (6) are provided on the tensioning block (5).

10. Super bolt structure for installation of an aero-retrofit gas turbine with a generator according to claim 1, characterised in that the long bolt (3) passes through the generator base (8) from below the installation base (7) upwards.