Turbine case lifting appliance and lifting method

Abstract

A turbine case lifting appliance is used for lifting a turbine case with turned-over edges at the front end and the rear end respectively and comprises a connecting rod and clamping jaws, a mounting position is arranged on the connecting rod, and the two clamping jaws are mounted on the mounting position; the clamping jaw comprises a clamping plate and a connecting pin, the clamping plate is provided with a clamping groove matched with the turnup of the turbine case, and the clamping plate is arranged on the connecting pin in a penetrating mode and can rotate around the connecting pin. The lifting appliance can realize quick lifting, and the mounting efficiency of the lifting appliance is improved. The invention further provides a turbine case hoisting method.

Description

Technical Field

[0001] The invention belongs to the field of aviation engines, and in particular relates to a turbine casing hoist and a hoisting method. Background Art

[0002] The turbine casing of a civil aviation engine is relatively large, with a diameter of up to 1500mm and a height of up to 700mm. Moreover, there are differences in the front and rear end structures of some turbines. For example, the front end installation edge is set as an inward-turned edge, while the rear end installation is set as an outward-turned edge. When assembling or troubleshooting, the turbine casing needs to be hoisted and turned over to inspect different areas of the turbine casing. The turbine casing is large in size and heavy in weight, and this process is very cumbersome. In particular, when using existing sling-type slings for hoisting, in order to ensure the force balance of the turbine casing, it is necessary to ensure that the sling connection position is on the same diameter of the casing, which requires counting holes during hoisting to ensure the correct installation position of the sling. The hole counting process is time-consuming and error-prone, resulting in low efficiency in the installation and hoisting of the sling. Therefore, providing a turbine casing sling that is easy and efficient to operate has high practical value for improving the assembly efficiency of the turbine casing. Summary of the invention

[0003] The purpose of the present invention is to provide a turbine casing lifting device to improve the installation efficiency of the lifting device. The present invention also provides a turbine casing lifting method.

[0004] According to an embodiment of one aspect of the present invention, there is provided a turbine casing hoist for hoisting a turbine casing having flanges at the front and rear ends respectively, the turbine casing hoist comprising a connecting rod and a claw, wherein the connecting rod is provided with a mounting position, and two of the claws are mounted on the mounting position; the claw comprises a clamping plate and a connecting pin, the clamping plate is provided with a clamping groove matching the flange of the turbine casing, the clamping plate is passed through the connecting pin and can rotate around the connecting pin.

[0005] Through this hoist, the claws can be quickly and accurately fixed on the turbine casing with a span of 180° to ensure the force balance of the turbine casing during the lifting process, avoid the number of holes in the installation process of the sling type hoist, and effectively improve the installation efficiency of the turbine casing hoist.

[0006] Furthermore, in some embodiments, the mounting position on the connecting rod is configured as a through hole, the claw is mounted on the connecting rod via a pin passing through the through hole, and a plurality of through holes are provided along the length direction of the connecting rod to match turbine casings of different diameters.

[0007] Furthermore, in some embodiments, the clamping claw includes a sliding seat, and the sliding seat is movably embedded in the connecting rod. The sliding seat is convenient for adjusting the specific fixing position of the clamping claw.

[0008] Furthermore, in some embodiments, the slide is fixed relative to the connecting rod along the circumferential direction. The fixed circumferential position of the slide relative to the connecting rod can ensure that the clamping plates at both ends are parallel to each other, avoiding the torsional deformation of the casing caused by the clamping plates at both ends of the same connecting rod not being parallel during installation.

[0009] Furthermore, in some embodiments, a locking mechanism is provided on the claw to lock the rotation of the clamping plate. The locking mechanism can lock the clamping plate to prevent the clamping plate from rotating and slipping during the hoisting process.

[0010] Furthermore, in some embodiments, the locking mechanism is configured as a limit pin. The locking pin can clamp and fix the card, and has a simple structure and is easy to operate.

[0011] Furthermore, in some embodiments, lifting ears are provided at both ends of the connecting rod for connecting to a lifting device.

[0012] Furthermore, in some embodiments, two connecting rods are provided for simultaneously hoisting the front and rear ends of the turbine casing respectively.

[0013] According to another embodiment of the present invention, a method for hoisting a turbine casing is provided, the method adopts the turbine casing hoist in any of the above embodiments, the method comprising the following steps: arranging a connecting rod so that the connecting rod passes through the axis of the end of the turbine casing and overlaps the end of the turbine casing; rotating the clamping plate so that the clamping groove is clamped to the flange of the end of the turbine casing to fix the turbine casing hoist on the turbine casing; hoisting the turbine casing. This hoisting method can avoid counting holes, effectively improve the efficiency of hoist installation, and save man-hours for turbine casing hoisting operations.

[0014] Furthermore, in some embodiments, the turbine case hoist is fixed to the front and rear ends of the turbine case respectively, and the connecting rods of the turbine case hoist installed at the front and rear ends of the turbine case are arranged in parallel. The hoist arranged in parallel at the front and rear ends helps to maintain force balance during the hoisting process of the turbine case, thereby preventing the case from being damaged during the hoisting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a turbine casing hanger structure in one embodiment;

[0016] Figure 2 This is a schematic diagram of the partial parts of a turbine casing hanger in one embodiment;

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the end of a turbine casing hanger in one embodiment;

[0018] Figure 4This is a schematic diagram of the front end hoisting of a turbine casing in one embodiment;

[0019] Figure 5 A schematic diagram of the hoisting of the rear end of a turbine casing in one embodiment;

[0020] Figure 6a This is a schematic diagram of a turbine casing before lifting in one embodiment;

[0021] Figure 6b A schematic diagram of a turbine casing lifting process in one embodiment;

[0022] Figure 6c This is a schematic diagram of a turbine casing after flipping in one embodiment.

[0023] The purpose of the above drawings is to explain the present invention in detail so that those skilled in the art can understand the technical concept of the present invention, but it is not intended to limit the present invention. For the sake of simplicity, the above drawings only schematically illustrate the structures related to the technical features of the present invention, and do not strictly follow the actual proportions to draw the complete structure and all details. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0025] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The phrase appearing in various locations in the specification does not necessarily refer to the same embodiment, nor is it limited to mutually exclusive independent or alternative embodiments. Those skilled in the art should be able to understand that the embodiments herein may be combined with other embodiments without causing structural conflicts.

[0026] In the description of this article, unless otherwise clearly specified and limited, the technical terms "installed", "connected", "connected" and the like should be understood in a broad sense, for example, it can be a movable connection, a fixed connection or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0027] In the description of this document, terms indicating orientation or positional relationships, such as "up", "down", "left", "right", "horizontal", "vertical", "height", "length", and "width", are intended to accurately describe the embodiments and simplify the description, but are not intended to limit the parts or structures involved to have a specific orientation, be installed or operate in a specific orientation, and should not be construed as a limitation on the embodiments in this document.

[0028] In the description of this article, the terms "first", "second" and the like are only used to distinguish different objects, and cannot be understood as indicating relative importance or limiting the quantity, specific order or primary and secondary relationship of the described technical features. In the description of this article, the meaning of "plurality" is at least two.

[0029] An embodiment of the present invention provides a turbine casing hanger, the structure of which is as follows: Figures 1 to 3 As shown, the lifting device is used to lift a turbine casing having a flange structure at the front and rear ends. The lifting device includes a connecting rod 1 and a claw 2, wherein the connecting rod 1 includes a rod body 11, and the rod body 11 is provided with a mounting position, and the claw 2 is installed on these mounting positions. In a preferred embodiment, the mounting position is configured as a plurality of through holes 12 arranged near the end of the connecting rod 1 and along the length direction of the connecting rod 1, and the claw is fixed on the rod body 11 through the through hole 12 by a pin 22. The claw 2 includes a clamping plate 21 and a connecting pin 25, and a clamping groove 27 is provided on the clamping plate 21. The clamping groove 27 matches the flange of the turbine casing to be lifted, so that the flange can be clamped in the clamping groove 27. The clamping plate 21 is passed through the connecting pin 25 and can rotate around the connecting pin 25, so that the clamping groove 27 can be adjusted in direction as needed, so that the inner flange or the outer flange can be clamped under different working conditions. Since the claws 2 of the hoist are fixedly arranged on the rigid connecting rod 1, during the installation of the hoist, as long as the connecting rod 1 passes through the axis of the turbine casing to be hoisted, it can be ensured that a pair of claws are clamped at both ends of the end face of the turbine casing with a span of 180°, thereby maintaining the force balance of the turbine casing during the hoisting process without having to ensure the accuracy of the hoisting position through several holes, thereby effectively improving the installation efficiency of the hoist.

[0030] In other embodiments, the mounting position may also be configured as a slot, a boss, or other structures with a limiting function.

[0031] In a preferred embodiment, the claw 2 also includes a slide 23, which is movably nested on the rod 11 of the connecting rod 1. In different embodiments, the slide 23 can be set to be externally nested or internally nested, and the slide 23 can slide along the length direction of the rod 11 so as to adjust the distance between the two claws to adapt to the end face diameters of different turbine casings. In a further preferred embodiment, the slide 23 is fixed circumferentially relative to the connecting rod 1 so that the slide 23 cannot rotate axially around the connecting rod 1 to ensure that the clamping plates 21 of the two claws 2 remain parallel during assembly and lifting to avoid twisting. Specifically, in some embodiments, the cross-sections of the rod 11 and the slide 23 are set to non-circular cross-sections, such as rectangular cross-sections or elliptical cross-sections, to prevent the slide 23 from circumferentially rotating around the rod 11; in other embodiments, a limiting groove or a limiting rib can also be set to limit the slide 23 circumferentially.

[0032] In a preferred embodiment, a locking mechanism is also provided on the claw 2 to lock the rotation of the card plate 21. In a further preferred embodiment, the locking mechanism is configured as a limit pin. For example, in some embodiments, a through hole 26a is provided on the slide 23, and a limit hole 29 is provided on the card plate 21. The latch 22 passes through the through hole 26a, the through hole 12 and the limit hole 29, so that the latch 22 also acts as a limit pin to lock the card plate 21, so that the card plate 21 cannot rotate around the connecting pin 25. In other embodiments, the limit pin can also be configured as an independent structure, or replaced by a boss or groove with a limit function.

[0033] In some embodiments, the end of the connecting rod 1 is provided with a lifting lug 13 for connecting the turbine casing lifting device to the lifting device. In some embodiments, the lifting lug 13 is configured as a dumbbell, and in other embodiments, it can also be configured as a ring or hook.

[0034] In a preferred embodiment, the turbine casing hoist is provided with two connecting rods 1 for hoisting the front and rear ends of the turbine casing respectively and simultaneously, so as to better maintain balance during the hoisting process.

[0035] In a preferred embodiment, using a structure such as Figures 1 to 3 The method of lifting the turbine case with the turbine case lifting device shown is as follows:

[0036] Combination Figure 4 , arrange the connecting rod 1 so that the axis of the connecting rod 1 passing through the end of the turbine casing 3 overlaps the front end of the turbine casing 3, install the clamping plate 21 on the connecting pin 25 and install the retaining ring 24 to prevent the clamping plate 21 from falling off, rotate the clamping plate 21 so that the clamping groove 27 faces the outside (that is, toward the end of the connecting rod 1), and insert the pin 22 into the through hole 26b for positioning. The specific method can be to first determine the position of the axis of the end of the turbine casing 3, or to first clamp the clamping groove 27 of the clamping claw 2 on one side with the inner flange 31 of the front end of the turbine casing 3, and rotate the connecting rod 1 with the clamping claw 2 in place as the axis to find the point where the front end of the turbine casing 3 is farthest from the clamping claw 2 in place, which is the installation position of the clamping claw 2 on the opposite side. After the clamping grooves 27 of the two clamping claws 2 are clamped and fixed with the inner flange 31 of the turbine casing 3, an angular limit pin 28 is installed on the clamping plate 21 so that the angular limit pin 28 passes through the mounting holes on the clamping plate 21 and the inner flange 31 to lock the clamping plate 21 and the inner flange 31.

[0037] Combination Figure 5, install the hanger at the rear end of the turbine casing 3. In the same way, arrange the connecting rod 1 at the rear end of the turbine casing 3, so that the connecting rod passes through the axis of the end of the turbine casing 3 and overlaps the rear end of the turbine casing, install the clamping plate 21 on the connecting pin 25 and install the retaining ring 24 to prevent the clamping plate 21 from falling off, rotate the clamping plate 21 so that the slot 27 faces inward (i.e., toward the middle of the connecting rod 1), and insert the pin 22 into the through hole 26a for positioning. After the slots of the two claws 2 are clamped and fixed with the outer flange 32 of the turbine casing 3, install the angular limit pin 28 on the clamping plate 21, so that the angular limit pin 28 passes through the mounting holes on the clamping plate 21 and the outer flange 32, and locks the clamping plate 21 and the outer flange 32.

[0038] Finally, combine Figures 6a to 6c , respectively connect the lifting device to the connecting rod 1a fixed to the front end of the turbine casing 3 and the connecting rod 1b fixed to the rear end of the turbine casing 3, and lift the turbine casing 3 from Figure 6a The front end is lifted up in the state where the rear end is up, and the transition is to Figure 6b The axis of the turbine casing 3 shown in the figure is in a horizontal state, and finally flips to the position as shown in the figure. Figure 6c In the state shown, the front end of the turbine casing 3 is at the top and the rear end is at the bottom, and the lifting and turning operation of the turbine casing 3 is completed.

[0039] In a preferred embodiment, in the above-mentioned lifting method, the connecting rod 1a fixed at the front end of the turbine casing 3 and the connecting rod 1b fixed at the rear end are parallel to each other to ensure the force balance of the turbine casing 3 during the lifting process and avoid twisting of the turbine casing 3 due to different forces at the front and rear ends when lifting.

[0040] The purpose of the above embodiments is to further explain the present invention in detail in conjunction with the accompanying drawings so that those skilled in the art can understand the technical concept of the present invention. Within the scope of the claims of the present invention, the optimization or equivalent replacement of the part structure or method steps involved, and the combination of implementation methods in different embodiments without conflict of structure and principle, all fall within the protection scope of the present invention.

Claims

1. A turbine casing hoist, used for hoisting a turbine casing having flanges at the front and rear ends, characterized in that: It includes a connecting rod and a claw, wherein: The connecting rod is provided with a mounting position, and the two clamping claws are mounted on the mounting position; The clamping claw comprises a clamping plate and a connecting pin. The clamping plate is provided with a clamping groove matching the flange of the turbine casing. The clamping plate is penetrated through the connecting pin and can rotate around the connecting pin.

2. The turbine casing hanger according to claim 1, characterized in that: The mounting position on the connecting rod is configured as a through hole, and the claw is mounted on the connecting rod via a pin penetrating the through hole. A plurality of through holes are provided along the length direction of the connecting rod to match turbine casings of different diameters.

3. The turbine casing hanger according to claim 1 or 2, characterized in that: The clamping claw comprises a sliding seat which is movably nested in the connecting rod.

4. The turbine case hanger according to claim 3, characterized in that: The sliding seat is fixed relative to the connecting rod along the circumferential direction.

5. The turbine casing hanger according to claim 1 or 2, characterized in that: The clamping claw is also provided with a locking mechanism for locking the rotation of the clamping plate.

6. The turbine case hanger according to claim 5, characterized in that: The locking mechanism is configured as a limit pin.

7. The turbine casing hanger according to claim 1 or 2, characterized in that: Lifting ears are arranged at both ends of the connecting rod for connecting with a lifting device.

8. The turbine casing hanger according to claim 1 or 2, characterized in that: The connecting rods are provided with two for hoisting the front and rear ends of the turbine casing respectively and simultaneously.

9. A method for hoisting a turbine casing, characterized in that: Using the turbine casing hanger as described in any one of claims 1 to 8, the method comprises the following steps: Arranging a connecting rod so that the connecting rod passes through the axis of the end of the turbine casing and overlaps the end of the turbine casing; Rotate the clamping plate to make the clamping slot engage with the flange at the end of the turbine casing to fix the turbine casing hanger on the turbine casing; The turbine casing is lifted.

10. The turbine casing hoisting method according to claim 9, characterized in that: The turbine case hangers are respectively fixed to the front and rear ends of the turbine case, and the connecting rods of the turbine case hangers installed at the front and rear ends of the turbine case are arranged in parallel.

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