A gas cylinder support assembly and a gas turbine

Abstract

The application provides a gas cylinder support assembly and a gas turbine comprising the same. The gas cylinder support assembly comprises a bracket and a cylinder support cantilever, the bracket is provided with a groove near one side of the cylinder support cantilever, and further comprises a thermal expansion absorbing assembly connected to the cylinder support cantilever, and the thermal expansion absorbing assembly is at least partially arranged in the groove. The gas cylinder support assembly absorbs thermal expansion in the transverse and axial directions by means of the thermal expansion absorbing assembly, thereby avoiding the limitation of using the bracket itself as an expansion absorbing material, so that the bracket can be made of a material with better rigidity, thereby improving the stability of the whole machine, the rotor dynamics and the rigidity margin of the whole machine.

Description

Technical Field

[0001] This application relates to the field of gas turbines, and more particularly to a cylinder support assembly and a gas turbine including the cylinder support assembly. Background Technology

[0002] In gas turbine design, the rear support is typically considered a relative dead point of the entire turbine. Its main function is to absorb thermal expansion and vibration loads, thereby improving the overall stability of the turbine. Siemens employs a long-rod type rear support structure. By selecting a long rod with a certain degree of toughness and pre-bending it at a certain angle during assembly, it bends in the opposite direction due to thermal expansion during turbine operation, thus absorbing the thermal expansion through the material's toughness. At the same time, this support point can withstand the static load of the entire turbine and some vibration loads caused by earthquakes, blade loss, etc., achieving a comprehensive balance between the turbine's mechanical stability and thermal expansion adaptability.

[0003] The existing rear support structure has the following problems:

[0004] ① Over-reliance on the material properties of the rear support rod may lead to its failure if the load is too large;

[0005] ②The rear support structure needs to have a certain degree of toughness, so its diameter and material properties are limited, which imposes more restrictions on rotor dynamics and overall machine stiffness.

[0006] Patent CN204627755U discloses a cylinder support assembly, including a support arm for supporting the cylinder. The support arm is rotatable around a first pivot connector and is connected to the cylinder via the first pivot connector, thus meeting the axial expansion requirements of the cylinder. Furthermore, the lower end of the support arm is rotatably connected to a bearing seat via a rotating mechanism. This allows the support arm not only to rotate around the first pivot connector but also to rotate at small angles in the left-right direction of the cylinder via the rotating mechanism, simultaneously meeting the axial and radial expansion requirements of the cylinder. Additionally, the support seat has a mounting groove, and the lower end of the support arm with a ball head is installed in the mounting groove. A first compensation element, a disc-shaped washer, is provided in the gap formed between the ball head and the inner wall of the mounting groove. The disc-shaped washer is used to compensate for the gap between the ball head and the bearing seat and has a certain degree of elasticity.

[0007] Patent CN114542292A discloses a cylinder block support device for a gas turbine. A linear sliding part moves laterally and axially along the support assembly to absorb the axial and lateral thermal expansion of the cylinder block. Specifically, a second wedge-shaped linear sliding part accommodates a first integral linear sliding part. The length of the first protrusion of the first integral linear sliding part in the axial direction Y is A, and the length of the sliding body in the axial direction Y is C. The length of the first groove of the first support assembly in the axial direction Y is B, and the length of the second wedge-shaped linear sliding part in the axial direction Y is D. In the axial direction Y, the one-sided gap between the first protrusion and the first groove is (BA) / 2. To absorb the axial expansion of the cylinder block, the value of the one-sided gap (BA) / 2 must be greater than the axial expansion of the cylinder block. The axial expansion of the cylinder block is obtained through multiple experiments. Similarly, the one-sided gap (DC) / 2 between the sliding body and the second wedge-shaped linear sliding part should also be greater than the axial expansion of the cylinder block, so that the stress caused by the expansion of the cylinder block can be fully released.

[0008] Although the above-mentioned devices can absorb the thermal expansion of the cylinder or cylinder body to a certain extent, they still have certain limitations: for example, the support arm or sliding parts are prone to wear under long-term heat and vibration, and the compensation accuracy gradually decreases; at the same time, their structure mainly focuses on expansion compensation in the axial or transverse single direction, and is insufficient for stress release under multidimensional expansion and complex working conditions. Summary of the Invention

[0009] The purpose of this application is to solve the aforementioned technical problems.

[0010] To achieve the above objectives, the first aspect of this application provides a cylinder support assembly, including a bracket and a cylinder support cantilever, wherein the bracket has a groove on the side near the cylinder support cantilever.

[0011] It also includes a thermal expansion absorption component, which is connected to the cylinder support cantilever, and the thermal expansion absorption component is at least partially disposed in the groove.

[0012] Furthermore, the thermal expansion absorption component includes an elastic support component that fills the side space between the groove and the cylinder support cantilever, and the elastic support component can extend and retract in a direction perpendicular to the cylinder axis.

[0013] Furthermore, the groove extends along the axial direction of the cylinder.

[0014] Furthermore, the thermal expansion absorption assembly also includes a pad that is connected to the cylinder support cantilever and can move along the groove.

[0015] Furthermore, it also includes adjusting shims, which are located between the pad block and the cylinder support cantilever.

[0016] Furthermore, the adjusting shims and pads are connected to the cylinder support cantilever via bolts.

[0017] Furthermore, the resilient support assembly includes a resilient sealing plate and / or a spring.

[0018] Furthermore, the elastic support assembly includes multiple springs arranged axially along the cylinder.

[0019] Furthermore, the pad has a mounting groove on the side near the groove, and the bolt is installed in the mounting groove.

[0020] Another aspect of this application proposes a gas turbine employing the aforementioned cylinder support assembly.

[0021] By applying the above-described technical solution of the present invention, at least the following technical effects are achieved:

[0022] ① The laterally installed elastic support components absorb the lateral thermal expansion and lateral vibration generated by the gas turbine during operation;

[0023] ② The pad blocks slide along the cylinder axis in the groove to absorb the thermal expansion of the gas turbine in the axial direction.

[0024] ③ Set adjustment shims. Adjust the height of the rear support of the whole machine by assembling adjustment shims of different thicknesses according to the actual situation.

[0025] ④ The cylinder support assembly uses a thermal expansion absorption component to absorb thermal expansion, avoiding the limitation of using the bracket itself as an expansion absorption material. This allows the bracket to be made of a material with better stiffness, improving the overall stability of the machine and increasing the rotor dynamics and overall machine stiffness margin.

[0026] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0027] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0028] Figure 1 A schematic diagram of the bracket and cylinder support cantilever structure in the cylinder support assembly is shown in one embodiment;

[0029] Figure 2 A cross-sectional view of the cylinder support assembly in one embodiment is shown;

[0030] Figure 3 A partial view of the elastic support component in the cylinder support assembly of one embodiment is shown;

[0031] Figure 4 A partial view of the elastic support component in the cylinder support assembly of another embodiment is shown;

[0032] Figure 5 An assembly diagram of the cylinder support assembly in one embodiment is shown.

[0033] Reference numerals: 100, bracket; 200, cylinder support cantilever; 120, groove; 300, elastic support assembly; 400, pad; 500, adjusting shim; 600, bolt; 420, mounting slot; 10, cylinder. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] The present invention will be further described in detail below with reference to specific embodiments, which should not be construed as limiting the scope of protection claimed by the present invention.

[0036] According to one aspect of the present invention, a cylinder support assembly is provided, as shown in the attached figure. Figure 1 As shown, the cylinder support assembly includes a bracket 100 and a cylinder support cantilever 200. The cylinder support cantilever 200 is symmetrically arranged on both sides of the cylinder 10 in the circumferential direction, and the bracket 100 provides support for the cylinder.

[0037] To absorb the lateral thermal expansion and lateral vibration generated during the operation of the gas turbine, this application introduces a thermal expansion absorption component, as shown in the attached figure. Figure 2 As shown.

[0038] Furthermore, the bracket 100 has a groove 120 on the side near the cylinder support cantilever 200, and the thermal expansion absorption component is connected to the cylinder support cantilever 200. The thermal expansion absorption component is at least partially disposed in the groove 120.

[0039] The thermal expansion absorption assembly includes an elastic support assembly 300, which fills the side space between the groove 120 and the cylinder support cantilever 200. The elastic support assembly 300 can extend and retract in the direction perpendicular to the axial direction of the cylinder to absorb lateral thermal expansion.

[0040] The elastic support assembly 300 includes an elastic sealing sheet and / or a spring. (See attached...) Figure 3 and 4 As shown, when the elastic support assembly 300 uses springs, there are multiple springs, and these multiple springs are arranged along the cylinder axis.

[0041] The thermal expansion absorption assembly also includes a pad 400 connected to the cylinder support cantilever 200, with the pad 400 at least partially located inside the groove 120. Furthermore, in this application, the groove 120 extends axially along the cylinder, and the pad 400 is movable along the groove 120 to absorb the axial thermal expansion of the gas turbine.

[0042] Preferably, the thermal expansion absorption assembly proposed in this application further includes an adjusting shim 500, which is located between the pad 400 and the cylinder support cantilever 200. Adjusting shims of different thicknesses can be installed to adjust the height of the rear support of the entire machine according to the actual situation.

[0043] As attached Figure 5 As shown, in this application, the adjusting shim 500 and the pad 400 are connected to the cylinder support cantilever 200 by bolts 600, which is convenient for disassembly and assembly, and facilitates the replacement of the adjusting shim and the pad. In addition, the pad 400 has a mounting groove 420 on the side near the groove 120, and the bolt 600 is installed in the mounting groove 420.

[0044] Another aspect of this application proposes a gas turbine that employs the aforementioned cylinder support assembly.

[0045] By applying the above-described technical solution of the present invention, at least the following technical effects are achieved:

[0046] ① The laterally installed elastic support components absorb the lateral thermal expansion and lateral vibration generated by the gas turbine during operation;

[0047] ② The pad blocks slide along the cylinder axis in the groove to absorb the thermal expansion of the gas turbine in the axial direction.

[0048] ③ Set adjustment shims. Adjust the height of the rear support of the whole machine by assembling adjustment shims of different thicknesses according to the actual situation.

[0049] ④ The cylinder support assembly uses a thermal expansion absorption component to absorb thermal expansion, avoiding the limitation of using the bracket itself as an expansion absorption material. This allows the bracket to be made of a material with better stiffness, improving the overall stability of the machine and increasing the rotor dynamics and overall machine stiffness margin.

[0050] The above are merely several specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0052] It should be noted that, in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A cylinder support assembly, characterized in that, It includes a bracket (100) and a cylinder support cantilever (200), wherein the bracket (100) has a groove (120) on the side near the cylinder support cantilever (200). It also includes a thermal expansion absorption component connected to the cylinder support cantilever (200), and the thermal expansion absorption component is at least partially disposed within the groove (120).

2. The cylinder support assembly according to claim 1, characterized in that, The thermal expansion absorption assembly includes an elastic support assembly (300) that fills the side space between the groove (120) and the cylinder support cantilever (200). The elastic support assembly (300) can extend and retract in a direction perpendicular to the axial direction of the cylinder.

3. The cylinder support assembly according to claim 1 or 2, characterized in that, The groove (120) extends along the axial direction of the cylinder.

4. The cylinder support assembly according to claim 3, characterized in that, The thermal expansion absorption assembly also includes a pad (400) connected to the cylinder support cantilever (200), and the pad (400) is movable along the groove (120).

5. The cylinder support assembly according to claim 4, characterized in that, It also includes an adjusting shim (500) located between the pad (400) and the cylinder support cantilever (200).

6. The cylinder support assembly according to claim 5, characterized in that, The adjusting shim (500) and the pad (400) are connected to the cylinder support cantilever (200) by bolts (600).

7. The cylinder support assembly according to claim 2, characterized in that, The elastic support assembly (300) includes an elastic sealing sheet and / or a spring.

8. The cylinder support assembly according to claim 7, characterized in that, The elastic support assembly (300) includes a plurality of springs arranged axially along the cylinder.

9. The cylinder support assembly according to claim 6, characterized in that, The pad (400) has a mounting groove (420) on the side near the groove (120), and the bolt (600) is installed in the mounting groove (420).

10. A gas turbine, characterized in that, The cylinder support assembly described in any one of claims 1-9 is used.

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