阅读说明：本技术 用于燃气轮机的悬挂系统以及所属的燃气轮机 (Suspension system for a gas turbine and associated gas turbine ) 是由 D·穆勒 C·科瓦尔齐克 于 2018-06-14 设计创作，主要内容包括：本发明涉及一种用于燃气轮机(4)的悬挂系统(2),包括两个导轨(14),在每个导轨(14)上具有一个固定部分(10),用于将导轨(14)固定在燃气轮机(4)的人孔(6)上,并且每个导轨(14)具有至少一个移动元件(16),该移动元件(16)可以沿着导轨(14)移动。借助于这样的悬挂系统(2),维护工具和/或轮机组件可以容易地穿过人孔并且移动到其使用位置。(The invention relates to a suspension system (2) for a gas turbine (4), comprising two guide rails (14), with a fastening part (10) on each guide rail (14) for fastening the guide rail (14) to a manhole (6) of the gas turbine (4), and with each guide rail (14) having at least one displacement element (16), which displacement element (16) can be displaced along the guide rail (14). By means of such a suspension system (2), the service tool and/or the turbine assembly can easily be passed through the manhole and moved to its position of use.)

1. A suspension system (2) for a gas turbine (4) comprising two units that can be connected to each other, wherein each unit has a guide rail (14), on which guide rail (14) there is a circular segment-shaped fixing part (10) for fixing the guide rail (14) on a manhole (6) of the gas turbine (4), and each guide rail (14) has at least one moving element (16), which moving element (16) can be moved along the guide rail (14).

2. The suspension system (2) according to claim 1, wherein both units are identically constructed.

3. The suspension system (2) according to claim 1 or 2, comprising two cross bars (18), the two cross bars (18) extending transversely to the two guide rails and connecting the guide rails (14) to each other.

4. The suspension system (2) of claim 3, wherein each cross bar (18) is rotatably placed on one of the rails (14).

5. Suspension system (2) according to any of the preceding claims, wherein stop elements (22) are provided on the ends of the guide rail (14) for supporting the guide rail (14) on a turbine housing.

6. The suspension system (2) according to any one of the preceding claims, wherein each rail (14) is provided with two moving elements (16), the two moving elements (16) being connectable to each other via one safety device.

7. Gas turbine (4) with a manhole (6) formed in its outer casing and with a suspension system (2) according to any one of the preceding claims, wherein the manhole (6) has a flange (8) along the circumference around the manhole (6), and wherein the fixed part (10) is detachably connected with the flange (8) such that the guide rail (14) with the moving element (16) extends in the interior of the gas turbine.

8. Gas turbine (4) according to claim 7, wherein the radius of the circular arch shaped fixing part (10) substantially corresponds to the radius of the flange (8) of the manhole (6).

Technical Field

The present invention relates to a suspension system for a gas turbine. Furthermore, the invention relates to a gas turbine having a manhole formed on its casing and having such a suspension system.

Background

During maintenance operations of the gas turbine, in particular of the stationary gas turbine, various operations take place in the exhaust gas duct. For gas turbines, service personnel can access the hot gas application area in the interior of the gas turbine through specially designed service inlets (known as manholes).

For example, EP 2655808 a1 discloses a method for removing a bearing body from a rotor of a stationary gas turbine. Here, the shaft extension is fixed on the relevant end of the rotor and at the same time supports and/or holds the rotor to free the bearing body from the weight of the rotor. The sliding element is then mounted between the bearing body and the rotor, and the bearing body can then be pushed along the machine axis onto the shaft extension and parked there. Such shaft extensions are large, long or cumbersome, whereby although the shaft extension may pass through the manhole, the shaft extension has to be rotated or moved towards the bearing body.

Disclosure of Invention

Since manholes have only limited openings and service tools (such as shaft extensions) can only be moved in the manholes, in some cases the path of movement may be insufficient or it may be very complicated to transport the service tool to the proper location or position the service tool. This problem can be solved, for example, by mounting eyelets on the roof to extend the suspension and sling point area for the path of movement of the maintenance tool or turbine assembly.

The object of the invention is to propose a new suspension system by means of which maintenance tools and/or turbine assemblies can be easily passed through a manhole and moved to their position of use.

According to the invention, this object is achieved by a suspension system for a gas turbine, comprising two units which can be connected to one another, wherein each unit has a guide rail on which there is a fixing section of circular segment shape for fixing the guide rail on a manhole of the gas turbine, and each guide rail has at least one moving element which can be moved along the guide rail.

Furthermore, according to the invention, this object is achieved by a gas turbine having a manhole formed on its outer casing and having a suspension system in which the manhole has a flange around its circumference and in which the fixed part is detachably connected with the flange such that the guide rail with the moving element extends in the interior of the gas turbine.

The advantages and preferred embodiments mentioned in relation to the suspension system can be similarly applied to gas turbines.

The invention is based on the following idea: the suspension system is constructed such that it can be fixed very easily and securely on the one hand on the manhole of the gas turbine and on the other hand has a large freedom of movement within the gas turbine. This is achieved by: the suspension system is designed in two parts so that the two units of the suspension system can be fixed in their position of use independently of each other. Preferably, both units are identically constructed. Furthermore, the fixing portion of the suspension system is shaped and dimensioned to correspond to the flange of the manhole, so that it can be placed on the flange and detachably connected thereto, in particular screwed. In particular, this is achieved by means of circular segment-shaped fixing portions, wherein the radius of the circular segment of each fixing portion substantially corresponds to the radius of the flange of the manhole. Here, the annular flange is formed in particular by an annular bearing surface around the circumference of the manhole, wherein the cover is mounted on the flange during operation of the gas turbine.

In particular, the fixed part of the suspension system is configured as a circular arc or a circular bow having a circular arc radius and a length defined by a circular chord. Since the radius of the circular arc of the fastening portion substantially corresponds to the radius of the flange, the fastening portion can be placed flush with its outer contour on the mating fastening portion and is firmly mounted in this position.

Both parts or units of the suspension system are mounted on the flange of the manhole directly opposite each other so that there is sufficient space in the middle part between the two fixed parts to allow tools or turbine components to pass through and into the manhole or for maintenance personnel to have access to the interior of the gas turbine. The fastening portion placed on the flange is spaced apart from the guide rail, so that in the mounted state of the suspension system the fastening portion is placed on the flange and the guide rail extends in the interior of the gas turbine.

The tool or turbine assembly is suspended and moved to the desired position by two rails of the suspension system. The guide rails are connected to the respective fixed portions by connecting plates. Each rail extends parallel to the circular chord of the fixed part. In the assembled state, the guide rails are also parallel to each other. The two ends of the guide rail are equidistant from the fixed portion. The guide rail is arranged at a distance in height from the fixing part, so that in the assembled state of the suspension system the fixing part outside the manhole is placed on the flange and at the same time the guide rail extends completely in the turbine interior.

At least one moving element is arranged on each guide rail, which moving element is designed in particular as a pulley that can be moved along the respective guide rail. In particular, the displacement element has eyelets on which a chain block for carrying a maintenance tool or component can be suspended.

The main advantages of such a suspension system are: the suspension system can be reused by a detachable connection to the manhole. The suspension system can also be applied to a variety of turbine types, as the shape and size of the suspension system need only match the size of the manhole.

According to a preferred embodiment, the suspension system comprises two cross bars which extend transversely to the two guide rails and connect the guide rails to one another. An increase in the stiffness of the system, in particular a torsional-resistant system stiffness, is thus ensured in the case of an asymmetrical weight distribution. The transverse bars are arranged in the end regions of the respective guide rails. The cross-bar is advantageously placed on the side of the rail facing the opening of the manhole.

According to another preferred embodiment, each crossbar is rotatably placed on one of the plurality of rails. The first end of the cross bar is fixed to the guide rail and the cross bar is rotatably disposed about the fulcrum. The crossbar is rotatable between at least a first rotational position in which the crossbar extends parallel to the guide rails and a second rotational position in which the crossbar extends transverse to the guide rails and the opposite end of the crossbar reaches the second guide rail. In other words, in the folded state the crossbar is located on the first rail and in the unfolded state the crossbar extends perpendicular to the first rail, in particular the crossbar is pre-mounted on the first rail and can be fixed by the other end on the second rail, such that the crossbar mechanically connects the two rails to each other. The two crossbars may be rotatably mounted on the same rail, or each crossbar may be rotatably mounted on a different rail.

Preferably, a stop element is provided at the end of the guide rail for supporting the guide rail on the turbine housing. In particular, the stop element is height-adjustable. For example, the stop element is designed as an adjustment screw, the height of which can be adjusted by rotating it up and down.

Preferably, each guide rail is provided with two moving elements, which can be connected to each other via a safety device. By means of the securing device, the mobile element is locked in its position, in particular during the entry of the guide rail into the manhole, so that the risk of collision is reduced in the event of an undesired sliding of the mobile element.

Drawings

Embodiments of the present invention are explained in more detail with reference to the accompanying drawings. Here:

figure 1 shows a perspective view of a suspension system mounted on a manhole of a gas turbine, and

fig. 2 shows a perspective view of a detailed structure of the suspension system according to fig. 1.

In the drawings, like reference numerals have the same meaning.

Detailed Description

Fig. 1 shows a part of a gas turbine 4 having a manhole 6 with an annular flange 8, a two-part suspension system 2 being installed in the manhole 6. The suspension system 2 has two fastening parts 10, the fastening parts 10 being configured in the embodiment shown as circular segments. Along the circular arc shaped holes 11 of the fixing part 10 screws (not shown in detail) can be passed through the holes 11, wherein subsequently the screws are passed through corresponding holes 13 on the flange 8 of the manhole 6 in order to create a screw connection between the flange 8 and the fixing part 10.

In the assembled state of the suspension system 2, the distance D between two points of the fixed part 10 that are diametrically opposite and furthest apart from each other₁Between 900mm and 1500 mm. This distance corresponds approximately to the diameter of the manhole 6. Distance D between the circular chords of the fixed part 10₂Between 800mm and 1200mm, D in the embodiment shown₂＝900mm。

A guide rail 14 is arranged on each of the two fixed parts 10 by means of a connecting plate 12. As can be seen from fig. 2, the individual guide rails 14 are arranged symmetrically with respect to the associated stationary part 10, so that both ends of the guide rails 14 are equidistant from the stationary part 10. Each guide rail 14 is provided with at least one moving element 16, here a pulley, which moving element 16 can move along the entire guide rail 14. In the embodiment according to fig. 2, each guide rail 14 is provided with two pulleys 16, which pulleys 16 can be moved independently of each other. In particular, the pulleys 16 can be connected to one another by means of a securing device, which is not shown in greater detail here, so that the pulleys 16 are fixed in their position and cannot be moved undesirably along the guide rail 14.

The suspension system 2 has two units 15, wherein each unit 15 comprises a stationary part 10 and a guide rail 14 with an associated moving element 16. In the embodiment shown, the two units 15 are identical.

Furthermore, the suspension system 2 comprises two cross bars 18, which cross bars 18 connect the two guide rails 14 to one another in the end regions of the guide rails 14. The two units 15 are mechanically coupled to each other by a crossbar 18. Two crossbars 18 are held on one of these rails 14, the first ends of both crossbars being rotatable about a fulcrum 20. The crossbar 18 can be rotated according to arrow S. In the open state shown in fig. 2, the second end of the crossbar 18 is fixed to the second rail 14.

The rails 14 are dimensioned such that the crosspieces 18 lie completely on the respective rail 14 in the folded state, i.e. the length of each rail consists of twice the length of the crosspiece 18 and additionally the length of the area for fixing the connecting plate 12.

Furthermore, stop elements 22 are placed on the ends of the guide rails 14 for supporting the guide rails 14 on the turbine housing. The stop element 22 is designed, for example, as an adjusting screw.

The suspension system 2 may also comprise further elements, such as for example: which is placed between the fixing part 10 and the flange 8 of the manhole 6 in order to distribute the force of the fixing part 10 over a larger area.

For example, the suspension system 2 is mounted in the following manner: in a first step, the first guide rail 14 is introduced through the manhole 6 with the pulleys 16 fixed. The guide rail 14 is first placed vertically. The guide rails 14 are only placed back into the horizontal position in the interior of the gas turbine 4. The fixed part 10 is placed on the flange 8 of the manhole 6, wherein it is noted that: the holes 13 of the flange 8 are aligned with the holes 11 of the fixing portion 10. The screws are then screwed into the holes 11 and 13.

The second rail 14 is also mounted in the same manner.

Finally, the cross bar is opened and secured and the adjustment screw 22 is unscrewed until the adjustment screw 22 abuts against the casing of the gas turbine 4, thereby preventing the rail 14 from twisting under load.

To use the suspension system 2, the chain block is suspended on four pulleys 16. The safeties of the pulleys 16 are then released and the pulleys are moved along the rails 14.