Pressing tool for mounting gas turbine disc assembly

Abstract

The utility model discloses a hold-down clamp for mounting a gas turbine disc component, a central bolt is embedded in the middle of a gas turbine disc through a lock cup, the hold-down clamp comprises a screw rod, one end of the screw rod is detachably connected with the central bolt, and a pressing piece is nested on the screw rod. A plurality of supporting columns which are distributed in a ring array mode with the axis of the pressing piece as the axis are arranged on the end face of the end, facing the lock cup, of the front side of the pressing piece, each supporting column is provided with a clamping head, the inner side of each clamping head is an arc face, and the pressing piece can slide on the threaded rod so that the clamping heads can penetrate through the outer side of the center bolt to clamp the side wall of the lock cup. Therefore, the side wall of the lock cup deforms, and the lock cup can fasten the center bolt. The structure of an existing lock cup hold-down device is optimized, the strength of the chuck of the lock cup hold-down device is improved, the lock cup hold-down device can well achieve compression deformation of a lock ring, the lock cup is completely attached to a Zhongxing bolt, the lock cup hold-down device can meet the use requirement after being repeatedly used for many times, the service life of the lock cup hold-down device is greatly prolonged, and the use cost is reduced. And the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical installation tools, in particular to a press for installing a gas turbine disc assembly. Background Art

[0002] The common method of locking cup pressing is to use an ordinary locking cup press to press the locking cup, then pass the screw through the central through hole of the locking cup, screw it into the threaded hole of the center bolt, then use a wrench to press the screw, and use another wrench to tighten the nut to drive the press, thereby pressing the locking cup. After the gas turbine disc is installed in place, it is necessary to use the center bolt to lock the gas turbine disc to prevent the gas turbine disc from moving forward and backward during the operation of the engine. In order to further ensure the safety and reliability of the gas turbine disc, a locking cup is added between the gas turbine disc and the center bolt. When the center bolt is installed in place, the three convex teeth at the bottom of the locking cup are inserted into the three grooves of the gas turbine disc. The installation of the gas turbine disc can be completed by simply pressing the locking cup against the center bolt. The ordinary locking cup press has an unreasonable structure of the locking cup chuck, which causes the locking cup to not fit the center bolt, and the chuck of the locking cup press is not strong enough, so it cannot meet the requirements after several uses. Utility Model Content

[0003] The utility model aims to provide a press for installing a gas turbine disc assembly, which has a simple structure, is easy to operate and can conveniently enable a lock cup to lock a center bolt.

[0004] The utility model is realized through the following technical scheme: a press for installing a gas turbine disk assembly, wherein a center bolt is embedded in the middle of the gas turbine disk through a locking cup, comprising a screw rod at one end detachably connected to the center bolt, a press piece is nested on the screw rod, and a front side of the press piece is provided with a plurality of support columns arranged in a ring array with the axis of the press piece on the end surface facing one end of the locking cup, a chuck is installed on each of the support columns, and the inner side of the chuck is an arc surface, and the press piece can slide on the screw rod so that the chuck is close to the outer side of the center bolt to clamp the side wall of the locking cup, thereby deforming the side wall of the locking cup, thereby realizing the fastening of the locking cup to the center bolt.

[0005] The working principle of this technical solution is that the screw plays a role in positioning and guiding the pressure piece, one end of the screw is fixed to the center bolt in the middle of the gas turbine disc to fix the position, the pressure piece slides on the screw, and under the guiding action of the screw, the chuck installed on the support column on the front end face of the pressure piece will pass through the outside of the center bolt to the side wall of the lock cup. Since the inner layer of the chuck is an arc surface, during the continuous sliding of the pressure piece toward the lock cup, the side wall of the lock cup will be deformed and concave inward under the action of the chuck, thereby fastening the lock cup and the center bolt.

[0006] In order to better realize the utility model, further, a second threaded column is provided at one end of the screw rod connected to the central bolt, and the end of the screw rod is threadedly connected to the central bolt through the second threaded column.

[0007] In order to better realize the utility model, further, the middle part of the screw is a first threaded column, a threaded hole matching the first threaded column is provided in the pressing piece, and the pressing piece is threadedly connected to the first threaded column in the middle part of the screw through the threaded hole.

[0008] In order to better realize the utility model, further, the surface of the pressing piece is also provided with a reticulated knurling.

[0009] In order to better realize the utility model, further, the middle part of the screw is a first threaded column, the pressure piece is nested on the first threaded column, and a clamping nut threadedly connected to the first threaded column is also provided on the rear side of the pressure piece. The clamping nut can be rotated on the first threaded column to clamp the pressure piece, so that the chuck on the front side of the pressure piece moves toward the direction of the lock cup until the lock cup is clamped.

[0010] In order to better realize the utility model, further, the other end of the first threaded column in the middle of the screw rod is provided with a flat head compared to the second threaded column.

[0011] In order to better implement the present invention, further, the first threaded column is coaxial with the second threaded column, and the diameter of the first threaded column is not less than the diameter of the second threaded column.

[0012] In order to better realize the utility model, further, arc chamfers are provided between the support column and the end surface of the pressing piece.

[0013] In order to better realize the utility model, further, two support columns are symmetrically arranged on the end surface of the front side of the pressure piece facing one end of the lock cup, and the minimum distance between the upper clamps of the two support columns is 0.1mm~0.3mm larger than the diameter of the maximum cross-section of the center bolt.

[0014] In order to better realize the utility model, further, the curvature of the inner arc surface of the chuck is 1°~5°.

[0015] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0016] (1) The utility model optimizes the structure of the existing lock cup press, so that it can better realize the compression deformation of the lock ring, so that the lock cup and the ZTE bolt are completely fitted, thereby improving the efficiency of the gas turbine disk, ensuring the stability of the gas turbine disk installation, and further improving the safety of the gas turbine disk;

[0017] (2) The utility model optimizes the locking cup pressing structure and increases the strength of the locking cup pressing tool chuck, so that the locking cup pressing tool can meet the use requirements after repeated use, and its service life is greatly extended, which in turn reduces the manufacturing cost of the pressing tool;

[0018] (4) The utility model has a reasonable structure, complete functions, and a relatively simple operation process. It can overcome the technical problem of unreasonable structural setting of the existing lock cup press. It ensures that the lock cup and the center bolt fit tightly, thereby improving the installation quality of the gas turbine disc and is suitable for wide promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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:

[0020] Figure 1 It is a schematic diagram of the explosion structure of a gas turbine disk;

[0021] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0022] Figure 3 It is a cross-sectional view of the utility model in use;

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the medium-pressure component of the utility model;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the screw in the utility model;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the lock cup that is not pressed in the utility model;

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the locking cup after being pressed in the utility model.

[0027] Among them: 1—pressing piece, 11—support column, 12—chuck, 13—threaded hole, 2—screw, 21—first threaded column, 22—second threaded column, 23—flat head, 3—pressing nut, 4—center bolt, 5—locking cup, 6—gas turbine disk. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, it is limited that "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly including one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Embodiment 1:

[0032] The structure of the gas turbine disk assembly is as follows Figure 1 As shown, a central bolt 4 is embedded in the middle of the gas turbine disk 6 through a locking cup 5 .

[0033] The main structure of this embodiment is as follows: Figures 2~4 As shown, it includes a screw rod 2 with one end detachably connected to the center bolt 4, a pressing piece 1 is embedded on the screw rod 2, and a plurality of support columns 11 arranged in a ring array with the axis of the pressing piece 1 are arranged on the end face of the front side of the pressing piece 1 facing the end of the lock cup 5, and each of the support columns 11 is installed with a chuck 12, and the inner side of the chuck 12 is an arc surface. The pressing piece 1 can slide on the screw rod 2 so that the chuck 12 is close to the outer side of the center bolt 4 to clamp the side wall of the lock cup 5, thereby deforming the side wall of the lock cup 5, thereby realizing the fastening of the lock cup 5 to the center bolt 4.

[0034] The specific usage process is: fix one end of the screw rod 2 with the center bolt 4, and then nest the pressing piece 1 on the screw rod 2. The front end face of the pressing piece 1 has a support column 11 on one side facing the center bolt 4, and then push the pressing piece 1 to slide on the screw rod 2, so that the chuck 12 installed on the upper part of the support column 11 is close to the center bolt 4, and clamps the side wall of the lock cup 5 from the outside. Since the inner side of the chuck 12 is an arc surface, as the pressing piece 1 continues to move on the screw rod 2 toward the center bolt 4, the chuck 12 clamps the side wall of the lock cup 5, causing the side wall of the lock cup 5 to sink inward and deform, thereby achieving the fastening of the lock cup 5 and the center bolt 4.

[0035] After the locking cup 5 is locked, the screw rod 2 can be directly separated from the central bolt 4 , and the pressing piece 1 on the screw rod 2 can be removed together.

[0036] Embodiment 2:

[0037] Based on the above embodiment, this embodiment further defines the structure of the screw 2, such as Figure 5 As shown, a second threaded column 22 is provided at one end of the screw 2 connected to the center bolt 4, and the end of the screw 2 is threadedly connected to the center bolt 4 through the second threaded column 22. The second threaded column 22 provided at the end of the screw 2 is mainly for threaded connection with the end of the center bolt 4, so as to achieve the fixation of the end of the screw 2 to the entire gas turbine disc assembly. After the pressing piece 1 completes the locking process of the lock cup 5, the screw 2 can also be easily separated from the entire gas turbine disc assembly. At this time, there is no need to deliberately remove the pressing piece 1 from the screw 2, which further ensures the fixing effect and simplifies the installation process of the entire gas turbine disc assembly. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0038] Embodiment 3:

[0039] Based on the above embodiment, this embodiment further defines the structure of the screw 2, such as Figure 5 As shown, the middle part of the screw 2 is a first threaded column 21, and the pressing piece 1 is provided with a threaded hole 13 matching the first threaded column 21, and the pressing piece 1 is threadedly connected with the first threaded column 21 in the middle part of the screw 2 through the threaded hole 13. The first threaded column 21 is provided in the middle part of the screw 2 mainly to realize the threaded connection process with the pressing piece 1, so that when the pressing piece 1 moves on the screw 2, it is necessary to rotate the pressing piece 1 so that the pressing piece 1 slides on the screw 2, thereby realizing the locking process of the lock cup 5. The screw 2 is threadedly connected with the pressing piece 1 through the first threaded column 21, which can ensure the stability of the sliding process of the pressing piece 1, so that the locking quality of the lock cup 5 can be ensured. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0040] Embodiment 4:

[0041] Based on the above embodiments, this embodiment further defines the structure of the pressing member 1, such as Figure 4 As shown, the surface of the pressing piece 1 is also provided with a knurled pattern. Since the pressing piece 1 is threadedly connected to the first threaded column 21 of the screw rod 2, the pressing piece 1 needs to be rotated during the sliding process. In order to avoid slipping, a knurled pattern is provided on the surface of the pressing piece 1 to facilitate the rotation of the pressing piece 1. The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0042] Embodiment 5:

[0043] Based on the above embodiment, this embodiment further adds a clamping nut 3. Figure 2 , Figure 3 As shown, the middle part of the screw rod 2 is a first threaded column 21, and the pressing piece 1 is nested on the first threaded column 21. A clamping nut 3 threadedly connected to the first threaded column 21 is also provided on the rear side of the pressing piece 1. The clamping nut 3 can be rotated on the first threaded column 21 to clamp the pressing piece 1, so that the chuck 12 on the front side of the pressing piece 1 moves toward the lock cup 5 until the lock cup 5 is clamped. Since the lock cup 5 will provide a reverse thrust to the chuck 12 at the front end of the pressing piece 1 during the locking process of the lock cup 5, the clamping nut 3 is specially provided, and the clamping nut 3 cooperates with the first threaded column 21 to prevent the pressing piece 1 from rebounding and ensure the locking quality of the lock cup 5. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0044] Embodiment 6:

[0045] Based on the above embodiment, this embodiment further defines the structure of the screw 2, such as Figure 5 As shown, a flat head 23 is provided at the other end of the first threaded column 21 in the middle of the screw rod 2 compared to the second threaded column 22. Since the pressure piece 1 or the locking nut 3 needs to rotate on the screw rod 2, and the screw rod 2 and the center screw rod 4 are also threadedly connected, in order to avoid mutual interference between the two, a flat head is particularly provided at the other end of the screw rod 2, so that when the pressure piece 1 or the locking nut 3 rotates on the screw rod 2, the flat head 23 can be clamped by tools such as pliers to prevent the screw rod 2 from rotating and affecting the fixing and guiding effect. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0046] Embodiment 7:

[0047] Based on the above embodiment, this embodiment further defines the structure of the screw 2, such as Figure 5As shown, the first threaded column 21 is coaxial with the second threaded column 22, and the diameter of the first threaded column 21 is not less than the diameter of the second threaded column 22. By defining the relationship between the first threaded column 21 and the second threaded column 22 in this way, the guiding effect of the screw rod 2 on the pressing piece 1 can be well achieved, and the diameter of the first threaded column 21 is slightly larger than the second threaded column 22, which can prevent the first threaded column 21 from contacting the center bolt 4, causing the screw rod 2 to penetrate the entire center bolt 4, thereby playing a role in limiting the fixing of the screw rod 2. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0048] Embodiment 8:

[0049] Based on the above embodiments, this embodiment further defines the structure of the pressing member 1, such as Figure 4 As shown, arc chamfers are provided between the support column 11 and the end surface of the pressing piece 1. This arrangement can prevent the support column 11 from contacting the center bolt 4 and causing damage to the center bolt, and can also increase the strength of the support column 11. The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0050] Embodiment 9:

[0051] Based on the above embodiments, this embodiment further defines the structure of the pressing member 1, such as Figure 4 As shown, two support columns 11 are symmetrically arranged on the end surface of the front side of the pressing piece 1 facing one end of the lock cup 5, and the minimum spacing between the upper clamps 12 of the two support columns 11 is 0.1mm~0.3mm larger than the diameter of the maximum cross section of the center bolt 4. The number of clamps 12 determines the number of concave sides of the lock cup 5 side wall. Considering the cost, the fastening structure of the lock cup 5 and the center bolt 4, it is more appropriate to have concave sides of the lock cup 5 symmetrically, that is, the number of clamps 12 is two, and they are symmetrically arranged. In addition, since the lock cup 5 is placed inside the gas turbine disc 6, the spacing between the clamps 12 cannot be too large, otherwise it cannot be placed in the gas turbine disc 6, but the clamps 12 must pass through the outside of the center bolt 4. After actual measurement, it is most appropriate that the minimum spacing between the clamps 12 is 0.1mm~0.3mm larger than the diameter of the maximum cross section of the center bolt 4, and the setting of this distance can also prevent the pressing piece 1 from moving left and right during the clamping process. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0052] Embodiment 10:

[0053] Based on the above embodiment, this embodiment further defines the structure of the pressing piece 1, and the curvature of the inner arc surface of the chuck 12 is 1°~5°. The curvature of the inner arc surface of the chuck 12 determines the depth of the concave side wall of the lock cup 5. After measuring the lock cup 5 and the center bolt 4, it is preferred that the curvature of the inner arc surface is 1°~5°, so that the lock cup 5 and the center bolt 4 are locked without damaging the center bolt 4. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0054] It can be understood that the device structure of a press for installing a gas turbine disk assembly according to an embodiment of the utility model, such as the working principle and working process of components such as the screw 2 and the clamping nut 3 are all prior arts and are well known to technicians in this field, and will not be described in detail here.

[0055] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A press for installing a gas turbine disk assembly, wherein a central bolt (4) is embedded in the middle of the gas turbine disk (6) through a locking cup (5), characterized in that: The invention comprises a screw rod (2) having one end detachably connected to a central bolt (4), a pressing piece (1) being embedded in the screw rod (2), a front end surface of the pressing piece (1) facing one end of the locking cup (5) being provided with a plurality of support columns (11) arranged in a ring array around the axis of the pressing piece (1), each of the support columns (11) being provided with a chuck (12), the inner side of the chuck (12) being in the form of an arc surface, the pressing piece (1) being able to slide on the screw rod (2) so that the chuck (12) is close to the outer side of the central bolt (4) to clamp the side wall of the locking cup (5), thereby deforming the side wall of the locking cup (5) and achieving the fastening of the locking cup (5) to the central bolt (4).

2. A press for installing a gas turbine disk assembly according to claim 1, characterized in that: A second threaded column (22) is provided at one end of the screw rod (2) connected to the central bolt (4), and the end of the screw rod (2) is threadedly connected to the central bolt (4) via the second threaded column (22).

3. A press for installing a gas turbine disk assembly according to claim 2, characterized in that: The middle portion of the screw rod (2) is a first threaded column (21), a threaded hole (13) matching the first threaded column (21) is provided in the pressing piece (1), and the pressing piece (1) is threadedly connected to the first threaded column (21) in the middle portion of the screw rod (2) via the threaded hole (13).

4. A press for installing a gas turbine disk assembly according to claim 3, characterized in that: The surface of the pressing piece (1) is also provided with reticulated knurling.

5. A press for installing a gas turbine disk assembly according to claim 2, characterized in that: The middle part of the screw rod (2) is a first threaded column (21), the pressing piece (1) is nested on the first threaded column (21), and a clamping nut (3) threadedly connected to the first threaded column (21) is also provided on the rear side of the pressing piece (1), and the clamping nut (3) can be rotated on the first threaded column (21) to clamp the pressing piece (1), so that the clamp (12) on the front side of the pressing piece (1) moves towards the locking cup (5) until the locking cup (5) is clamped.

6. A press for installing a gas turbine disk assembly according to any one of claims 3 to 5, characterized in that: A flat head (23) is provided at the other end of the first threaded column (21) in the middle of the screw rod (2) compared to the second threaded column (22).

7. A press for installing a gas turbine disk assembly according to any one of claims 3 to 5, characterized in that: The first threaded column (21) and the second threaded column (22) are coaxial, and the diameter of the first threaded column (21) is not less than the diameter of the second threaded column (22).

8. A press for installing a gas turbine disk assembly according to any one of claims 1 to 5, characterized in that: Arc chamfers are provided between the support column (11) and the end surface of the pressing piece (1).

9. A press for installing a gas turbine disk assembly according to any one of claims 1 to 5, characterized in that: Two support columns (11) are symmetrically arranged on the end surface of the front side of the pressing piece (1) facing one end of the locking cup (5), and the minimum distance between the upper clamps (12) of the two support columns (11) is 0.1 mm to 0.3 mm larger than the diameter of the maximum cross section of the central bolt (4).

10. A press for installing a gas turbine disk assembly according to any one of claims 1 to 5, characterized in that: The arc angle of the inner arc surface of the chuck (12) is 1° to 5°.

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