A method, device and support for mounting a damper for a steam generator

Abstract

The application discloses a damping mounting method, device and support for a steam augmentor. The method is characterized in that one or more than one first support is arranged on a negative pressure cavity section of the steam augmentor close to a power steam inlet and a steam suction inlet, and three or more than three second supports are arranged on a Venturi throat section close to a steam exhaust port; the first support is fixedly connected with an outer shell of the steam augmentor for support, and the first support is fixedly connected with the ground or the top surface of a support column; the second support is slidingly connected with the outer shell of the steam augmentor for support, and the second support can be elastically stretched and contracted up and down in a direction perpendicular to the ground after being fixedly connected with the ground or the top surface of the support column. The method can effectively improve problems such as unstable operation, poor dynamic regulation performance and loud noise of the steam augmentor.

Description

Technical Field

[0001] This invention relates to the field of steam injection, and more specifically, to a vibration damping installation method and apparatus for a steam turbine, as well as a support for the apparatus. Background Technology

[0002] like Figure 1 As shown, the structure of the booster mainly consists of three parts: nozzle 1, negative pressure chamber 2, and Venturi throat 3. High-pressure steam enters the booster's nozzle 1 from the power steam inlet A, forming a high-speed jet. According to the principle of dynamics, the static pressure around it will decrease sharply as the flow velocity increases, forming a negative pressure zone (negative pressure chamber 2). The steam with relatively low pressure in the steam inlet B, located in the negative pressure zone, is drawn in, mixed and accelerated, and then expanded, decelerated, and pressurized after passing through the Venturi throat 3, and discharged from the exhaust port C at a pressure higher than that of the steam inlet B. The working principle of this large booster is to mix two fluids with different pressures, causing energy exchange and forming a mixed fluid with a moderate pressure. That is, high-pressure steam is used to increase the pressure of the exhaust steam, thereby increasing its saturation temperature. It has the advantages of reliable equipment, simple system, high working efficiency, and low subsequent maintenance workload.

[0003] Although the structure of a turbocharger is simple, the mixing process of its internal fluids is very complex, involving the interaction of shock waves, boundary layers, and shear layers. The mixing mechanism is not yet fully understood, resulting in significant vibrations and noise during operation. In particular, the third section of the Venturi throat, due to its long relative distance, is prone to large-scale vibrations after the two fluids at different pressures mix over a long distance, and the vibrations are irregular. In engineering practice, turbochargers suffer from many problems due to installation issues, such as unstable operation, poor dynamic adjustment performance, high noise, and inconsistencies between design and actual performance, thus preventing their widespread use. Summary of the Invention

[0004] The purpose of this invention is to provide a vibration-damping installation method and device for a gas turbine, as well as a support for the component device. This can effectively improve problems such as unstable operation, poor dynamic adjustment performance, and high noise levels in gas turbines.

[0005] The vibration damping installation method for the steam booster in this invention involves setting one or more first supports in the negative pressure chamber section of the steam booster near the power steam inlet and steam intake, and setting three or more second supports in the Venturi throat section near the exhaust port. The first supports are fixedly connected to the outer casing of the steam booster and are also fixedly connected to the ground or the top surface of the support column. The second supports are slidably connected to the outer casing of the steam booster and, after being fixedly connected to the ground or the top surface of the support column, can perform elastic up-and-down expansion and contraction in a direction perpendicular to the ground.

[0006] Preferably, the second supports are spaced apart and distributed at equal intervals in the Venturi throat section of the gas turbine.

[0007] Preferably, a guide sleeve is further covered on the outer shell of the venturi throat section of the gas turbine, and the second support is slidably connected to the guide sleeve for support.

[0008] The vibration damping installation device for the gas turbine in this invention includes a first support fixedly connected to the outer shell of the negative pressure chamber section of the gas turbine, and three second supports slidably connected to the outer shell of the venturi throat section of the gas turbine. Each support is independent and connected to the outer shell of the gas turbine. It is also directly fixedly installed on the ground or the top surface of the support column. The second supports are slidably connected to the outer shell of the gas turbine and can perform elastic vertical extension and retraction in the direction perpendicular to the ground.

[0009] Preferably, the second support includes an elastic bracket and a sliding bracket that are connected to each other by a large flat surface;

[0010] The sliding bracket includes a collar that is fitted around the outside of the gas turbine housing, a second base plate that is in the shape of a large-area flat plate, and a support frame for fixing the collar and the second base plate. The collar is slidably connected to the outer housing of the gas turbine.

[0011] The elastic support includes a spring support base plate, two or more springs, and a support top plate; both the spring support base plate and the support top plate are large-area flat plates, and multiple limiting posts are fixedly provided around the periphery of the spring support base plate. The support top plate is located inside the limiting posts and can slide up and down along the limiting posts. The springs are arranged between the spring support base plate and the support top plate.

[0012] The spring support base plate is fixedly connected to the ground or the top surface of the column, and the support top plate and the second base plate are attached to each other.

[0013] Preferably, the support frame includes a longitudinal rib plate welded to the substrate, and multiple transverse rib plates arranged perpendicularly and parallel to the longitudinal rib plate; the bottom of the support frame is fixedly connected to the second substrate, and the top is fixedly connected to the collar.

[0014] Preferably, the inner wall surface of the collar is integrally formed with a first toothed stripe, and a guide sleeve is covered on the outer shell of the gas turbine. The outer wall surface of the guide sleeve is integrally formed with a second toothed stripe. The first toothed stripe and the second toothed stripe mesh with each other, and both the first toothed stripe and the second toothed stripe extend along the axial direction of the collar.

[0015] Preferably, the first support includes an arc-shaped bracket supporting the outer shell of the gas turbine, and a first base plate in the shape of a large-area flat plate for fixing the arc-shaped bracket and the first base plate as a support frame; the arc-shaped bracket is fixedly connected to the outer shell of the gas turbine; and the first base plate is fixedly connected to the ground or the top surface of a column.

[0016] The support for vibration damping installation of a steam turbine in this invention includes an elastic bracket and a sliding bracket that are connected to each other by a large flat surface.

[0017] The sliding bracket includes a collar that is fitted around the outside of the gas turbine housing, a second base plate that is in the shape of a large-area flat plate, and a support frame for fixing the collar and the second base plate. The collar is slidably connected to the outer housing of the gas turbine.

[0018] The elastic support includes a spring support base plate, two or more springs, and a support top plate; both the spring support base plate and the support top plate are large-area flat plates, and multiple limiting posts are fixedly provided around the periphery of the spring support base plate. The support top plate is located inside the limiting posts and can slide up and down along the limiting posts. The springs are arranged between the spring support base plate and the support top plate.

[0019] The supporting top plate and the second substrate are attached to each other.

[0020] The vibration damping installation method and device in this invention can effectively improve problems such as unstable operation, poor dynamic adjustment performance, and high noise in turbochargers. Attached Figure Description

[0021] Figure 1 This is a schematic diagram illustrating the working principle of the steam generator in this invention.

[0022] Figure 2 This is a three-dimensional structural diagram of the installation of the steam generator in this invention.

[0023] Figure 3 This is a side view of the installation of the steam turbine in this invention.

[0024] Figure 4 This is a top view schematic of the installation of the steam turbine in this invention.

[0025] Figure 5 This is a three-dimensional structural schematic diagram of the vibration damping installation device for a gas turbine in this invention.

[0026] Figure 6 This is a three-dimensional structural diagram of the elastic support base in the second support of the present invention.

[0027] Figure 7 This is a three-dimensional structural diagram of the first support in this invention.

[0028] Figure 8 This is a three-dimensional structural diagram of the elastic support ring in the second support of the present invention.

[0029] Figure 9 This is a partially enlarged schematic diagram of the surface structure connecting the turbine housing and the second support in this invention. Detailed Implementation

[0030] The specific embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] As can be seen from the working principle of the steam booster, the working steam flow velocity at exhaust port C reaches supersonic speed (the velocity of the power steam after passing through the nozzle reaches 800-1000 m / s). This supersonic jet fluid will generate very large noise. At the same time, during the steam jet process, the steam flow pulsates due to the periodic changes in steam pressure and velocity. The pulsating steam flow passes through bends, reducers, nozzle throats, etc., generating a certain excitation force that varies with time. Under the action of this excitation force, the pipeline and auxiliary equipment will vibrate.

[0032] The noise generated is usually addressed by wrapping the turbine equipment and pipelines with sound-insulating materials or installing soundproof covers. However, there is currently no good solution for the vibration generated. But the method and apparatus described in this invention can effectively solve the vibration problem of the turbine pipelines and auxiliary equipment. Specifically:

[0033] like Figure 2 , Figure 3 and Figure 4As shown, the vibration damping installation device for the turbocharger in this invention includes a first support 4 installed in the negative pressure chamber 2 section of the turbocharger, and three second supports 5 installed in the venturi throat 3 section of the turbocharger. The first support 4 is fixedly connected to the outer casing of the turbocharger 7 and also fixedly connected to the top surface of the column 6. That is, the column 6, the first support 4, and the turbocharger 7 are fixed in place. The column 6 can be installed or not depending on the available space in the plant area; the first support 4 can be directly fixed to the ground. The three second supports 5 are all slidably connected to the outer casing of the turbocharger 7, and each second support 5 is fixedly connected to the top surface of an independent column 6. Alternatively, the second supports 5 can be directly fixed to the ground. The number of first supports 4 and second supports 5 can be increased adaptively depending on the size of the turbocharger 7. To achieve better vibration damping, the second supports 5 are spaced apart and evenly distributed in the venturi throat 3 section of the turbocharger 7. Because the second support 5 itself has the ability to elastically extend and retract vertically in a direction perpendicular to the ground, and combined with the sliding connection between the second support 5 and the turbine casing, the vibration of the turbine 7 in the front-back and vertical directions can be effectively resolved. Furthermore, the structure of the second support 5 ringing around the turbine casing of the turbine 7 can effectively prevent the turbine from shifting position due to vibration, ensuring the safe operation of the turbine 7, and simultaneously reducing the turbine 7's steam pressure requirements.

[0034] like Figure 5 and Figure 7 As shown, the first support 4 in this invention includes a first base plate 40, a support frame 45, and an arc-shaped bracket 43. The arc-shaped bracket 43 supports the outer casing of the turbine generator 7. The first base plate 40 is a large-area flat plate. The support frame 45, used to fix and connect the arc-shaped bracket 43 and the first base plate 40, includes a longitudinal rib 41 and multiple parallel transverse ribs 42. Preferably, the arc-shaped bracket 43 is fixedly connected to the outer casing of the turbine generator 7 (it can be welded); the first base plate 40 is fixedly connected to the ground or the top surface of the column 6, which can be fixed by bolts or by expansion bolts or other connecting parts. The first base plate 40, the support frame 45, and the arc-shaped bracket 43 are fixedly connected as a whole by welding. Preferably, a limiting rib 44 is fixedly provided on the outer surface of the arc-shaped bracket 43 to strengthen the connection and fixation between the support frame 45 and the arc-shaped bracket 43.

[0035] The inner diameter of the arc-shaped bracket 43 is the same as the outer diameter of the outer shell of the negative pressure chamber 2 of the turbine 7. The outer shell of the negative pressure chamber 2 of the turbine 7 is directly inserted into the arc-shaped bracket 43 without any relative movement.

[0036] like Figure 5 , Figure 6 and Figure 8As shown, the second support 5 in this invention includes an elastic bracket 50 and a sliding bracket 51 that are connected and bonded together by large planar surfaces. The sliding bracket 51 includes a collar 52 that fits over the outer shell of the venturi throat section 3 of the turbocharger housing 7, a support frame 45 fixedly connected to the collar 52, and a second base plate 53 that is a large-area flat plate. The support frame 45 has the same structure as the support frame in the first support 4 and will not be described separately.

[0037] The collar 52 can be directly fitted onto the outer casing of the turbine 7, with a clearance fit, allowing the turbine 7 to slide within the collar 52. Figure 9 As shown, a first toothed stripe 55 can also be integrally formed on the inner wall of the collar 52, while a guide sleeve 56 is wrapped around the outer shell of the turbine 7. A second toothed stripe 57 is integrally formed on the outer wall of the guide sleeve 56. The first toothed stripe 55 and the second toothed stripe 57 mesh with each other, and both the first toothed stripe 55 and the second toothed stripe 57 extend along the axial direction of the collar 52. This can effectively solve the problem of axial (front and rear) vibration of the turbine 7 and prevent the turbine 7 from twisting.

[0038] The elastic support 50 includes a spring-supported base plate 54, two or more springs 59, and a support top plate 58.

[0039] The spring support base plate 54 is a large rectangular flat plate that can be placed directly on the top surface of the column 6 or fixedly connected to the top of the column 6. Multiple limiting posts 60 are provided around the perimeter of the spring support base plate 54; in this embodiment, four are preferably fixed at both ends of each long side of the spring support base plate 54. A spring 59 is positioned between the spring support base plate 54 and the support top plate 58, with both ends of the spring 59 abutting against both the spring support base plate 54 and the support top plate 58. The support top plate 58 can move slightly up and down with the spring 59. After abutting against the spring 59, the support top plate 58 is positioned between the four limiting posts 60, which restrict its movement to vertical motion without causing deviation.

[0040] Four springs 59 are preferably distributed at equal intervals to ensure that the top plate 58 will not tilt. In addition, to facilitate the installation of springs 59, a spring mounting plate 61 is further provided at the connection between springs 59 and spring support base plate 54.

[0041] The area of ​​the second substrate 53 is less than or equal to the area of ​​the supporting top plate 58. It can be placed directly on the top surface of the supporting top plate 58 or fixedly connected as a whole.

[0042] The technical principles in the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of technical principles have been described. As long as there is no contradiction in these combinations of technical principles, they should be considered to be within the protection scope of this invention.

Claims

1. A vibration damping mounting device for a steam turbine, characterized in that, It includes a first support that is fixedly connected to the outer shell of the negative pressure chamber section of the turbine, and three second supports that are slidably connected to the outer shell of the venturi throat section of the turbine. Each support is independent and connected to the outer shell of the turbine. It is also directly fixed to the ground or the top surface of a support column. The second supports are slidably connected to the outer shell of the turbine and can elastically extend and retract vertically in a direction perpendicular to the ground. The second support includes an elastic bracket and a sliding bracket that are connected to each other by a large flat surface. The sliding bracket includes a collar that is fitted onto the outer shell of the Venturi throat section of the gas turbine housing, a support frame that is fixedly connected to the collar, and a second base plate that is in the shape of a large flat plate. The inner wall of the collar is integrally formed with a first toothed stripe, and the outer shell of the gas turbine is covered with a guide sleeve plate. The outer wall of the guide sleeve plate is integrally formed with a second toothed stripe. The first toothed stripe and the second toothed stripe mesh with each other, and both the first toothed stripe and the second toothed stripe extend along the axial direction of the collar.

2. The vibration damping mounting device for a steam turbine according to claim 1, characterized in that, The elastic support includes a spring-supported base plate, two or more springs, and a supporting top plate. Both the spring-supported base plate and the supporting top plate are large-area flat plates. Multiple limiting posts are fixedly provided around the periphery of the spring-supported base plate. The supporting top plate is located inside the limiting posts and can slide up and down along the limiting posts. The springs are arranged between the spring-supported base plate and the supporting top plate. The spring-supported base plate is fixedly connected to the ground or the top surface of the column, and the supporting top plate and the second base plate are closely connected to each other.

3. The vibration damping mounting device for a steam turbine according to claim 2, characterized in that, The support frame includes a longitudinal rib plate welded to the substrate, and multiple transverse rib plates arranged perpendicularly and parallel to the longitudinal rib plate; the bottom of the support frame is fixedly connected to the second substrate, and the top is fixedly connected to the collar.

4. The vibration damping mounting device for a steam turbine according to any one of claims 1-3, characterized in that, The first support includes an arc-shaped bracket supporting the outer shell of the gas turbine, and a first base plate in the shape of a large-area flat plate for fixing the arc-shaped bracket and the first base plate as a support frame; the arc-shaped bracket is fixedly connected to the outer shell of the gas turbine; and the first base plate is fixedly connected to the ground or the top surface of a column.

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