Gas turbine pressure diffuser system and adjustment method thereof

Abstract

The present invention discloses a gas turbine diffuser system and adjustment method thereof. The diffuser system comprises: a rotor; a diffuser disposed on the rotor; and a cylinder disposed radially outward of the diffuser. The diffuser system also includes a gap adjustment device, which extends at least partially through the cylinder from a side of the cylinder away from the rotor and is operatively connected to the diffuser to adjust the radial gap between the diffuser and the rotor. By introducing the gap adjustment device from the outside of the cylinder, the present invention allows adjustment of the gap between the exhaust diffuser and the rotor without removing the cylinder, resulting in more convenient operation, reduced flow losses, and improved operating efficiency and safety of the gas turbine.

Description

Technical Field

[0001] The present invention relates to a gas turbine, and in particular to a pressure diffuser system of a gas turbine and an adjustment method thereof. Background Art

[0002] The exhaust diffuser of a gas turbine compressor is located between the compressor and the combustion chamber and is mainly composed of an outer flow channel assembly, a support plate, and an inner flow channel assembly. The size of the gap between the exhaust diffuser and the rotor directly affects the aerodynamic efficiency of the gas turbine, the cooling effect of the turbine blades, and the operating safety. Effectively and reasonably controlling the gap between the exhaust diffuser and the rotor is of great significance.

[0003] In the prior art, the exhaust diffuser's entire ring structure is mounted on the rotor, positioned by the compressor's retaining ring. Adjusting the clearance between the exhaust diffuser and the rotor can only be done after removing the outer cylinder, by adjusting the exhaust diffuser and retaining ring to maintain concentricity. Not only is the clearance between the exhaust diffuser and the rotor impossible to measure and adjust after the cylinders are assembled, but adjusting the retaining ring's rotary-static clearance after the cylinders are assembled also affects the clearance between the compressor's exhaust diffuser and the rotor. Adjusting the clearance between the exhaust diffuser and the rotor without removing the outer cylinder has become a technical problem that needs to be solved.

[0004] Patent CN113518850A provides a gas turbine engine intermediate frame section with adjustable radial clearance. The radial clearance between the diffuser and the rotor is adjusted using a radial clearance adjustment assembly. The assembly is circumferentially mounted on the outer casing and utilizes pin thickness variations or an eccentric design to achieve left-right and vertical movement of the diffuser. This technology has two issues: first, the radial clearance between the diffuser and the rotor can only be adjusted after the outer casing is removed; second, the use of a combination pin structure makes installation difficult.

[0005] In view of the above technical problems, the present invention is specially introduced. Summary of the Invention

[0006] The main purpose of the present invention is to provide a gas turbine diffuser system and an adjustment method thereof, which can realize the centering adjustment of the compressor exhaust diffuser without opening the cylinder.

[0007] To achieve the above-mentioned objectives, according to one aspect of the present invention, a gas turbine diffuser system is provided, comprising: a rotor; a diffuser disposed on the rotor; and a cylinder body disposed radially outwardly of the diffuser, further comprising a gap adjustment device, the gap adjustment device being configured to at least partially penetrate the cylinder body from a side of the cylinder body away from the rotor, operatively connected to the diffuser, and thereby adjusting a radial gap between the diffuser and the rotor.

[0008] Furthermore, by adjusting the depth of the gap adjustment device inserted into the diffuser, the diffuser is driven to move, so that the axis of the diffuser moves toward the axis of the rotor, thereby adjusting the radial gap between the diffuser and the rotor.

[0009] Furthermore, the diffuser system includes two or more gap adjustment devices, which are evenly distributed along the circumference of the diffuser. The gap adjustment devices move radially along the diffuser, driving the diffuser to move along the radial tangential direction, thereby changing the radial gap between the diffuser and the rotor.

[0010] Furthermore, a plurality of grooves are provided in the circumferential direction of the diffuser of the diffusion system, and the grooves are distributed correspondingly to the gap adjustment devices.

[0011] Furthermore, the gap adjustment device includes an insertion rod, which passes through the cylinder body and is inserted into the diffuser groove.

[0012] Furthermore, a first plane is provided on the side of the insert rod close to the diffuser, and the first plane is inclined at a certain angle to the axis of the insert rod. When the depth of the groove in which the insert rod is inserted into the diffuser is increased, the first plane contacts the side of the groove, forcing the diffuser to move in a direction perpendicular to the movement direction of the insert rod, so as to change the radial clearance between the diffuser and the rotor.

[0013] Furthermore, the groove includes a first side surface, and the first side surface forms surface contact with the first plane.

[0014] Furthermore, the width of the groove becomes smaller along its depth direction.

[0015] Furthermore, the diffuser system includes a first group of gap adjustment units and a second group of gap adjustment units. The first group of gap adjustment units includes two gap adjustment devices symmetrically arranged in the height direction. The gap adjustment devices in the first group of gap adjustment units can move up and down in the height direction, driving the diffuser to move left and right in the horizontal direction. The second group of gap adjustment units includes two gap adjustment devices symmetrically arranged in the horizontal direction. The gap adjustment devices in the second group of gap adjustment units can move left and right in the horizontal direction, driving the diffuser to move up and down in the height direction.

[0016] Furthermore, when adjusting the radial gap between the diffuser and the rotor, the insertion rods in the two gap adjustment devices in the first group of gap adjustment units are arranged symmetrically. When the depth of the groove in which the insertion rods are inserted into the diffuser is increased, the insertion rods drive the diffuser to move horizontally.

[0017] Furthermore, the first plane is located on the left side of the insertion rod. When the depth of the groove in which the insertion rod is inserted into the diffuser is increased, the insertion rod drives the diffuser to move horizontally to the left.

[0018] Furthermore, the first plane is located on the right side of the insertion rod. When the depth of the groove in which the insertion rod is inserted into the diffuser is increased, the insertion rod drives the diffuser to move horizontally to the right.

[0019] Furthermore, the insertion rods in the two gap adjustment devices in the second group of gap adjustment units are arranged symmetrically. When the depth of the groove in which the insertion rod is inserted into the diffuser is increased, the insertion rod drives the diffuser to move upward in the height direction. When the depth of the groove in which the insertion rod is inserted into the diffuser is reduced, the insertion rod drives the diffuser to move downward in the height direction.

[0020] Furthermore, the gap adjustment device includes a connecting portion, one end of which is connected to the insertion rod, and the other end of which is connected to the cylinder body.

[0021] Furthermore, the gap adjustment device includes a depth adjustment piece, which is inserted into the connecting portion and abuts against the cylinder body. The depth adjustment piece adjusts the gap between the connecting portion and the cylinder body, thereby adjusting the depth of the insertion rod inserted into the groove.

[0022] Furthermore, the depth adjustment member includes an adjustment screw, which is rotated to change the length of the screw screwed between the connecting portion and the cylinder body.

[0023] Furthermore, the diffuser system gap adjustment device includes a fastener, which fixedly connects the cylinder body and the connecting portion.

[0024] Furthermore, the diffuser system further includes a clearance measurement system, which is used to measure the radial clearance between the diffuser and the rotor.

[0025] Furthermore, the diffuser system clearance measurement system includes a plurality of combined measurement holes, and the plurality of combined measurement holes are distributed along the circumference of the cylinder body.

[0026] Furthermore, the combined measuring hole includes a first measuring hole distributed around the cylinder body, a second measuring hole distributed around the diffuser, and a third measuring hole distributed around the gas turbine rotor. The first measuring hole, the second measuring hole and the third measuring hole are distributed radially along the rotor.

[0027] Furthermore, the clearance measurement system further includes a measuring tool, which measures the clearance between the diffuser and the rotor through the combined measuring hole.

[0028] Furthermore, the diffuser system further includes a holding ring, the diffuser is connected to the holding ring, and the holding ring limits the diffuser from moving along its axial direction.

[0029] Furthermore, the gap adjustment device also includes a cover plate, one end of the cover plate is connected to the fastener, and the other end is connected to the connecting part.

[0030] The gas turbine pressure diffuser system proposed in the present invention achieves the following technical effects:

[0031] 1. By introducing the gap adjustment device from the outside of the cylinder body, the gap between the exhaust diffuser and the rotor can be adjusted without removing the cylinder body, making the operation more convenient;

[0032] 2. The exhaust diffuser position is adjusted by the inclined surface structure of the insert rod and the depth adjustment piece. The structure is simple and the adjustment is convenient. The gap between the exhaust diffuser and the rotor can be effectively and reasonably controlled.

[0033] 3. The diffuser system checks the gap between the exhaust diffuser and the rotor through the gap measurement system, and makes real-time gap alignment adjustments based on the measurement results, simplifying the installation and adjustment process of the gas turbine.

[0034] 4. The diffuser system can reduce flow losses, improve the working efficiency of the gas turbine, and enhance the safety and stability of operation by controlling the gap between the exhaust diffuser and the rotor.

[0035] To achieve the above objectives, according to another aspect of the present invention, a method for adjusting a pressure diffuser system is provided. The method comprises the following steps:

[0036] Step 1: Use a measuring tool to measure the gap between the diffuser and the rotor;

[0037] Step 2: Adjust the depth adjustment members of the two gap adjustment devices in the second set of gap adjustment units to move the diffuser up and down in the height direction;

[0038] Step 3: Adjust the depth adjustment members of the two gap adjustment devices in the first set of gap adjustment units to move the diffuser left and right in the horizontal direction;

[0039] Step 4: Fix each gap adjustment device in the first group of gap adjustment units and the second group of gap adjustment units to the cylinder body through fasteners.

[0040] Furthermore, in step 2 of the adjustment method, the two gap adjustment devices in the second group of gap adjustment units are moved toward each other through the depth adjustment member, and the diffuser moves upward in the height direction, and vice versa.

[0041] Furthermore, step 3 includes step S31, inserting the insertion rods of the two gap adjustment devices in the first group of gap adjustment units into the groove so that the first plane is located on the left side of the insertion rod, the insertion rods of the two gap adjustment devices are symmetrically arranged, and the depth adjustment piece is adjusted to increase the depth of the groove in which the insertion rod is inserted into the diffuser, and the insertion rod drives the diffuser to move horizontally to the left.

[0042] Furthermore, step 3 also includes step S32, inserting the insertion rods of the two gap adjustment devices in the first group of gap adjustment units into the groove so that the first plane is located on the right side of the insertion rod, the insertion rods of the two gap adjustment devices are symmetrically arranged, and adjusting the depth adjustment piece to increase the depth of the groove in which the insertion rod is inserted into the diffuser, driving the diffuser to move horizontally to the right.

[0043] Furthermore, step 3 further includes step S33, after adjusting the diffuser to the preset position, adjusting the direction of the insertion rod 41 of any gap adjustment device in the first group of gap adjustment units so that the insertion rods of the two gap adjustment devices are arranged in opposite directions. The adjustment method of the gas turbine diffuser system proposed by the present invention achieves the following technical effects:

[0044] 1. This adjustment method adjusts the gap between the exhaust diffuser and the rotor without removing the cylinder body by adjusting the gap adjustment device outside the cylinder body, making the operation more convenient;

[0045] 2. This adjustment method achieves exhaust diffuser position adjustment through the inclined surface structure of the insert rod and the depth adjustment piece. It has a simple structure and is easy to adjust. It can effectively and reasonably control the gap between the exhaust diffuser and the rotor.

[0046] 3. This adjustment method uses a clearance measurement system to check the clearance between the exhaust diffuser and the rotor, and performs real-time clearance alignment adjustments based on the measurement results, simplifying the installation and adjustment process of the gas turbine.

[0047] 4. This adjustment method can reduce flow losses, improve the working efficiency of the gas turbine, and enhance the safety and stability of operation by adjusting the gap between the exhaust diffuser and the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0049] Figure 1 A schematic diagram of a gas turbine expansion system according to an embodiment of the present invention is shown;

[0050] Figure 2 A cross-sectional view of a gas turbine diffuser system according to an embodiment of the present invention is shown;

[0051] Figure 3 It shows a cross-sectional view of the installation structure of the gap adjustment device according to an embodiment of the present invention;

[0052] Figure 4 A cross-sectional view showing the installation of a first set of gap adjustment unit structures according to an embodiment of the present invention is shown;

[0053] Figure 5A cross-sectional view of the installation of a second set of gap adjustment unit structures according to an embodiment of the present invention is shown.

[0054] The above drawings include the following reference numerals:

[0055] 1. Diffuser system; 10. Rotor; 20. Diffuser; 21. Groove; 30. Cylinder body; 40. Gap adjustment device; 41. Insert rod; 43. First group of gap adjustment units; 44. Second group of gap adjustment units; 45. Connecting part; 46. Depth adjustment member; 47. Fastener; 48. Gap measurement system; 49. Cover plate; 50. Holding ring; 211. First side surface; 411. First plane; 481. Combined measuring hole; 483. First measuring hole; 484. Second measuring hole; 485. Third measuring hole. DETAILED DESCRIPTION

[0056] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0057] The present invention is described in further detail below with reference to specific embodiments. These embodiments are not to be construed as limiting the scope of protection claimed by the present invention. The term "including" when used indicates the existence of a feature, but does not exclude the existence or addition of one or more other features; the terms "lateral", "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be construed as limiting the present invention; in addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance.

[0058] In this description, it should be noted that, unless otherwise specified or limited, the terms "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention. Furthermore, in the description of the present invention, unless otherwise specified, "plurality" means two or more. Example

[0059] According to one aspect of the present invention, a gas turbine expansion system is provided. Figure 1As shown, it includes a rotor 10 , a diffuser 20 arranged on the rotor 10 , a cylinder 30 arranged radially outside the diffuser, and a gap adjustment device 40 .

[0060] The gap adjustment device 40 is configured to at least partially penetrate the cylinder body 30 from the side away from the rotor 10 and is operatively connected to the diffuser 20, thereby adjusting the radial clearance between the diffuser 20 and the rotor 10. Based on this, by adjusting the gap adjustment device 40 on the outside of the cylinder body, the gap between the exhaust diffuser 20 and the rotor 10 can be effectively controlled without removing the cylinder body. This adjustment structure is more convenient to operate, improving operational stability and work efficiency.

[0061] Specifically, the gap adjustment device 40 can be extended into the diffuser 20 to drive the diffuser 20 to move, so that the axis of the diffuser 20 moves toward the axis of the rotor 10, thereby realizing the centering adjustment of the diffuser 20 and the rotor 10, thereby adjusting the radial gap between the diffuser 20 and the rotor 10, ensuring that the corresponding gaps of each part are consistent, thereby reducing flow losses and improving operational safety.

[0062] From the perspective of the system's adjustment method, the gap adjustment device 40 can move in the radial direction of the diffuser 20. The radial movement of the gap adjustment device 40 along the diffuser 20 drives the diffuser 20 to move along its radial tangential direction, so that the diffuser 20 moves within its plane space and approaches the rotor 10, thereby changing the radial gap between the diffuser 20 and the rotor 10.

[0063] From the distribution of the gap adjustment devices, the diffuser system includes more than two gap adjustment devices 40, and the gap adjustment devices 40 are evenly distributed along the circumference of the diffuser 20, making the gap adjustment more convenient and accurate.

[0064] As a preferred solution of this application, Figure 2 As shown, the diffuser system includes four gap adjustment devices 40, two in the horizontal direction and two in the height direction. The four gap adjustment devices 4 are evenly distributed along the circumference of the diffuser 20, so that the gap adjustment devices can adjust the position of the diffuser in both the horizontal and height directions to achieve centering adjustment of the diffuser and the rotor.

[0065] In the present application, a plurality of grooves 21 are provided around the diffuser 20 circumference. The grooves 21 are distributed correspondingly to the gap adjustment devices 40 . The gap adjustment devices 40 are inserted into the grooves 21 respectively. The position of the diffuser is adjusted by adjusting the depth of the diffuser 20 inserted into the grooves 21 .

[0066] Specifically, if Figure 3As shown, the gap adjustment device 40 includes an insertion rod 41, which is inserted into the groove 21 of the diffuser 20 through the cylinder 30 to adjust the radial gap between the diffuser 20 and the rotor 10. The groove 21 includes a first side surface 211, and the width of the groove 21 decreases along its depth direction.

[0067] Specifically, a first plane 411 is provided on the side of the insert rod 41 close to the diffuser 20, and the first plane 411 is inclined at a certain angle to the axis of the insert rod 41. When the depth of the groove 21 in which the insert rod 41 is inserted into the diffuser 20 is increased, the first plane 411 forms surface contact with the first side surface 211. The first plane 411 is an inclined plane, and as the depth of the groove 21 in which the insert rod 41 is inserted into the diffuser 20 increases, the diffuser 20 is forced to move in a direction perpendicular to the moving direction of the insert rod 41. This changes the radial clearance from the diffuser 20 to the rotor 10. The position adjustment of the exhaust diffuser is achieved by utilizing the inclined structure of the insert rod, and this adjustment structure is simple and easy to process. The present application includes but is not limited to this insert rod adjustment method, and also includes other methods of introducing it from the outside of the cylinder body and interacting with the diffuser to adjust the diffuser gap.

[0068] As a preferred embodiment in this application, Figure 2 As shown, the diffuser system includes a first set of gap adjustment units 43 and a second set of gap adjustment units 44, which respectively adjust the diffuser's horizontal and height positions. Specifically, the first set of gap adjustment units 43 includes two gap adjustment devices 40 symmetrically arranged in the height direction. The gap adjustment devices 40 in the first set of gap adjustment units 43 can move up and down in the height direction, driving the diffuser 20 to move left and right in the horizontal direction. The second set of gap adjustment units 44 includes two gap adjustment devices symmetrically arranged in the horizontal direction. The gap adjustment devices 40 in the second set of gap adjustment units 44 can move left and right in the horizontal direction, driving the diffuser 20 to move up and down in the height direction. Adjusting the diffuser's horizontal and height positions using two sets of gap adjustment units is convenient and easy to operate, and the adjustment process is easy to control.

[0069] The specific arrangement method of the gap adjustment devices 40 in the first group of gap adjustment units 43 and the second group of gap adjustment units 44 is as follows:

[0070] like Figure 4As shown, when adjusting the radial clearance between the diffuser 20 and the rotor 10, the two insertion rods 41 in the gap adjustment devices 40 of the first set of gap adjustment units 43 are arranged symmetrically. As the insertion depth of the insertion rods 41 in the groove 21 of the diffuser 20 increases, the insertion rods 41 drive the diffuser 20 to move horizontally. When the first plane 411 is located to the left of the insertion rods 41, as the insertion depth of the insertion rods 41 in the groove 21 increases, the insertion rods 41 drive the diffuser 20 to move horizontally to the left. Similarly, when the first plane 411 is located to the right of the insertion rods 41, as the insertion depth of the insertion rods 41 in the groove 21 increases, the insertion rods 41 drive the diffuser 20 to move horizontally to the right.

[0071] like Figure 5 As shown, the insertion rods 41 in the two gap adjustment devices 40 in the second group of gap adjustment units 44 are arranged symmetrically. When the insertion rods 41 are inserted into the groove 21 in the diffuser 20 to increase in depth, the insertion rods 41 drive the diffuser 20 to move upward in the height direction. When the insertion rods 41 are inserted into the groove 21 in the diffuser 20 to decrease in depth, the insertion rods 41 drive the diffuser 20 to move downward in the height direction.

[0072] In addition, if Figure 3 As shown, the gap adjustment device 40 also includes a connecting portion 45, a depth adjustment member 46, a fastener 47, and a cover plate 49. The depth adjustment member 46 is used to adjust the depth of the insertion rod 41 into the groove 21 of the diffuser 20 to adjust the position of the exhaust diffuser 20. After the adjustment is completed, the fastener 47 is used to secure the insertion rod 41 to the cylinder body 30, ensuring the stability of the system operation.

[0073] Specifically, one end of the connecting portion 45 is connected to the insertion rod 41, and the other end of the connecting portion 45 is connected to the cylinder body 30. The depth adjusting member 46 is inserted into the connecting portion 45 and rests against the cylinder body 30. The depth adjusting member 46 adjusts the gap between the connecting portion 45 and the cylinder body 30, thereby adjusting the depth of the insertion rod 41 inserted into the groove 21. The depth adjusting member 46 includes an adjusting screw, and the adjusting screw is rotated to change the length of the screw screwed between the connecting portion 45 and the cylinder body 30. By rotating the adjusting screw, the movement of the insertion rod 41 is driven, and the depth of the insertion rod 41 inserted into the groove 21 is adjusted. The fastener 47 fixes the cylinder body 30 and the connecting portion 45. One end of the cover plate 49 is connected to the fastener 47, and the other end is connected to the connecting portion 45. First, the depth adjusting member 46 is used to adjust the position of the exhaust diffuser. After adjustment, the fastener 47 is used to fix the insertion rod 41 to the outer cylinder.

[0074] like Figure 2As shown, the clearance adjustment device 40 also includes a clearance measurement system 48 for measuring the radial clearance between the diffuser 20 and the rotor 10. This system includes multiple combined measurement holes 481 distributed circumferentially along the cylinder body 30. These holes measure the clearance between the exhaust diffuser and the rotor in four directions: vertical, horizontal, and horizontal, ensuring accurate adjustment. The clearance measurement system checks the clearance between the exhaust diffuser and the rotor and adjusts it based on the measured results, offering convenient operation and real-time monitoring and adjustment.

[0075] Specifically, combined measurement holes 481 include first measurement holes 483 distributed around the circumference of cylinder block 30, second measurement holes 484 distributed around the circumference of diffuser 20, and third measurement holes 485 distributed around the circumference of gas turbine rotor 10. First measurement holes 483, second measurement holes 484, and third measurement holes 485 are distributed radially along rotor 10.

[0076] In addition, the clearance measurement system 48 further includes a measuring tool, which passes through a channel formed by the combined measuring holes 481 to reach the rotor 10 to measure the clearance between the diffuser 20 and the rotor 10 .

[0077] In addition, the diffuser system further includes a holding ring 50 , to which the diffuser 20 is connected. The holding ring 50 limits the axial movement of the diffuser 20 , thereby improving the stability of the system operation.

[0078] In summary, the gas turbine pressure diffuser system proposed in the present invention achieves the following technical effects:

[0079] 1. By introducing a gap adjustment device from the outside of the cylinder body, the gap between the exhaust diffuser and the rotor can be adjusted without removing the cylinder body, which makes the operation more convenient; 2. The position of the exhaust diffuser is adjusted by the inclined structure and depth adjustment part of the insertion rod. The structure is simple and the adjustment is convenient. The gap between the exhaust diffuser and the rotor can be effectively and reasonably controlled; 3. The gap between the exhaust diffuser and the rotor is checked by the gap measurement system, and the gap alignment is adjusted in real time according to the measurement situation, which simplifies the installation and adjustment process of the gas turbine; 4. The horizontal and height positions of the diffuser are adjusted respectively by two sets of adjustment units. The operation is convenient and the adjustment accuracy is high; 5. By controlling the gap between the exhaust diffuser and the rotor, the flow loss is reduced, the working efficiency of the gas turbine is improved, and the safety and stability of the operation are improved.

[0080] To achieve the above object, according to another aspect of the present invention, a method for adjusting a pressure diffuser system is provided. The method comprises the following steps:

[0081] Step 1: Use a measuring tool to measure the gap between the diffuser 20 and the rotor 10;

[0082] Step 2: Adjust the depth adjustment members 46 of the two gap adjustment devices 40 in the second set of gap adjustment units 44 to move the diffuser 20 up and down in the height direction;

[0083] Step 3: Adjust the depth adjustment members 46 of the two gap adjustment devices 40 in the first set of gap adjustment units 43 to move the diffuser 20 left and right in the horizontal direction;

[0084] Step 4: Fix each gap adjustment device 40 in the first group of gap adjustment units 43 and the second group of gap adjustment units 44 to the cylinder body 30 through fasteners 47 .

[0085] Specifically, in step 2, if Figure 5 As shown, the two gap adjustment devices 40 in the second group of gap adjustment units 44 are relatively moved by the depth adjustment member 46, and the diffuser 20 moves upward in the height direction, and vice versa, the diffuser 20 moves downward in the height direction.

[0086] Step 3 includes steps S31, S32, and S33. In step S31, the insertion rods 41 of the two gap adjustment devices 40 in the first set of gap adjustment units 43 are inserted into the groove 21 so that the first plane 411 is located to the left of the insertion rods 41. The insertion rods 41 of the two gap adjustment devices 40 are symmetrically arranged. The depth adjustment member 46 is adjusted to increase the insertion depth of the insertion rods 41 into the groove 21 of the diffuser 20. The insertion rods 41 drive the diffuser 20 to move horizontally to the left.

[0087] In step S32, the insertion rods 41 of the two gap adjustment devices 40 in the first group of gap adjustment units 43 are inserted into the groove 21 so that the first plane 411 is located on the right side of the insertion rod 41. The insertion rods 41 of the two gap adjustment devices 40 are symmetrically arranged, and the depth adjustment member 46 is adjusted to increase the depth of the insertion rod 41 into the groove 21 in the diffuser 20, driving the diffuser 20 to move horizontally to the right.

[0088] Furthermore, in step S33, after the diffuser 20 is adjusted to the preset position, the direction of the insertion rod 41 of any gap adjustment device 40 in the first set of gap adjustment units 43 is adjusted so that the insertion rods 41 of the two gap adjustment devices 40 are arranged in opposite directions. This stabilizes the position of the diffuser 20 at the preset position.

[0089] In summary, the diffuser system adjustment method proposed in the present invention achieves the following technical effects:

[0090] 1. This adjustment method adjusts the gap between the exhaust diffuser and the rotor without removing the cylinder body by adjusting the gap adjustment device on the outside of the cylinder body, which makes the operation more convenient; 2. This adjustment method adjusts the position of the exhaust diffuser by inserting the inclined structure and depth adjustment part of the rod, which has a simple structure and is easy to adjust, and can effectively and reasonably control the gap between the exhaust diffuser and the rotor; 3. This adjustment method checks the gap between the exhaust diffuser and the rotor through a gap measurement system, and performs gap alignment adjustment in real time according to the measurement situation, which simplifies the installation and adjustment process of the gas turbine; 4. Independent adjustment of the horizontal and height positions of the diffuser is achieved by separately adjusting the gap adjustment devices in the two groups of adjustment units; 5. This adjustment method reduces flow losses, improves the working efficiency of the gas turbine, and improves the safety and stability of operation by adjusting the gap between the exhaust diffuser and the rotor.

[0091] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A gas turbine pressure diffuser system, comprising: A rotor (10); a diffuser (20) disposed on the rotor (10); and a cylinder (30) disposed radially outside the diffuser, characterized in that it further comprises a gap adjustment device (40), wherein the gap adjustment device (40) is arranged to at least partially pass through the cylinder (30) from a side of the cylinder (30) away from the rotor (10), and is operatively connected to the diffuser (20) to adjust the radial gap between the diffuser (20) and the rotor (10); By adjusting the depth of the gap adjustment device (40) inserted into the diffuser (20), the diffuser (20) is driven to move, so that the axis of the diffuser (20) moves toward the axis of the rotor (10), thereby adjusting the radial gap between the diffuser (20) and the rotor (10); The diffuser system comprises two or more gap adjustment devices (40), the gap adjustment devices (40) being evenly distributed along the circumference of the diffuser (20), and the gap adjustment devices (40) moving along the radial direction of the diffuser (20), driving the diffuser (20) to move along the radial tangential direction, thereby changing the radial gap between the diffuser (20) and the rotor (10); The diffuser (20) is provided with a plurality of grooves (21) in the circumferential direction, and the grooves (21) are distributed corresponding to the gap adjustment devices (40); The gap adjustment device (40) includes an insertion rod (41), and the insertion rod (41) passes through the cylinder (30) and is inserted into the groove (21) of the diffuser (20); A first plane (411) is provided on a side of the insertion rod (41) close to the diffuser (20), and the first plane (411) is inclined at a certain angle to the axis of the insertion rod (41). When the depth of the groove (21) in which the insertion rod (41) is inserted into the diffuser (20) is increased, the first plane (411) contacts the side of the groove (21), forcing the diffuser (20) to move in a direction perpendicular to the moving direction of the insertion rod (41), so as to change the radial clearance between the diffuser (20) and the rotor (10).

2. The pressure diffuser system according to claim 1, characterized in that: The groove (21) comprises a first side surface (211), and the first side surface (211) forms surface contact with the first plane (411).

3. The pressure diffuser system according to claim 2, characterized in that: The width of the groove (21) becomes smaller along its depth direction.

4. The pressure diffuser system according to claim 3, characterized in that: The pressure diffuser system comprises a first group of gap adjustment units (43) and a second group of gap adjustment units (44), wherein the first group of gap adjustment units (43) comprises two gap adjustment devices (40) symmetrically arranged in a height direction, wherein the gap adjustment devices (40) in the first group of gap adjustment units (43) can move up and down in a height direction, thereby driving the diffuser (20) to move left and right in a horizontal direction, and the second group of gap adjustment units (44) comprises two gap adjustment devices (40) symmetrically arranged in a horizontal direction, wherein the gap adjustment devices (40) in the second group of gap adjustment units (44) can move left and right in the horizontal direction, thereby driving the diffuser (20) to move up and down in a height direction.

5. The pressure diffuser system according to claim 4, characterized in that: When adjusting the radial gap between the diffuser (20) and the rotor (10), the insertion rods (41) in the two gap adjustment devices (40) in the first group of gap adjustment units (43) are symmetrically arranged, and when the depth of the insertion rods (41) into the groove (21) in the diffuser (20) is increased, the insertion rods (41) drive the diffuser (20) to move in the horizontal direction.

6. The pressure diffuser system according to claim 5, characterized in that: The first planes (411) of the two insertion rods (41) in the first group of gap adjustment units (43) are both located on the left side of the insertion rods (41). When the depth of the insertion rods (41) into the grooves (21) in the diffuser (20) is increased, the insertion rods (41) drive the diffuser (20) to move horizontally to the left.

7. The pressure diffuser system according to claim 5, characterized in that: The first plane (411) is located on the right side of the insertion rod (41), and when the insertion rod (41) is inserted into the groove (21) in the diffuser (20) to increase in depth, the insertion rod (41) drives the diffuser (20) to move horizontally to the right.

8. The pressure diffuser system according to claim 4 or 5, characterized in that: The insertion rods (41) in the two gap adjustment devices (40) in the second group of gap adjustment units (44) are symmetrically arranged. When the depth of the insertion rods (41) inserted into the grooves (21) in the diffuser (20) is increased, the insertion rods (41) drive the diffuser (20) to move upward in the height direction. When the depth of the insertion rods (41) inserted into the grooves (21) in the diffuser (20) is reduced, the insertion rods (41) drive the diffuser (20) to move downward in the height direction.

9. The pressure diffuser system according to claim 1, characterized in that: The gap adjustment device (40) includes a connecting portion (45), one end of the connecting portion (45) is connected to the insertion rod (41), and the other end of the connecting portion (45) is connected to the cylinder body (30).

10. The pressure diffuser system according to claim 9, characterized in that: The gap adjustment device (40) includes a depth adjustment member (46), which is inserted into the connecting portion (45) and abuts against the cylinder body (30). The depth adjustment member (46) adjusts the gap between the connecting portion (45) and the cylinder body (30), thereby adjusting the depth of the insertion rod (41) inserted into the groove (21).

11. The pressure diffuser system according to claim 10, characterized in that: The depth adjustment member (46) includes an adjustment screw, which is rotated to change the length of the screw screwed between the connecting portion (45) and the cylinder body (30).

12. The pressure diffuser system according to any one of claims 9 to 11, characterized in that: The gap adjustment device (40) includes a fastener (47), and the fastener (47) fixedly connects the cylinder body (30) and the connecting portion (45).

13. The pressure diffuser system according to claim 1, wherein: The invention also includes a clearance measurement system (48), wherein the clearance measurement system (48) is used to measure the radial clearance between the diffuser (20) and the rotor (10).

14. The pressure diffuser system according to claim 13, wherein: The gap measurement system (48) includes a plurality of combined measurement holes (481), and the plurality of combined measurement holes (481) are distributed along the circumference of the cylinder body (30).

15. The pressure diffuser system according to claim 14, characterized in that: The combined measuring hole (481) includes a first measuring hole (483) distributed in the circumference of the cylinder (30), a second measuring hole (484) distributed in the circumference of the diffuser (20), and a third measuring hole (485) distributed in the circumference of the rotor (10) of the gas turbine, wherein the first measuring hole (483), the second measuring hole (484) and the third measuring hole (485) are distributed along the radial direction of the rotor (10).

16. The pressure diffuser system according to claim 15, characterized in that: The clearance measurement system (48) further includes a measuring tool, which measures the clearance between the diffuser (20) and the rotor (10) through the combined measuring hole (481).

17. The pressure diffuser system according to claim 1, wherein: The diffuser system (1) further comprises a holding ring (50), the diffuser (20) being connected to the holding ring (50), and the holding ring (50) limiting the movement of the diffuser (20) along its axial direction.

18. The pressure diffuser system according to claim 12, wherein: The gap adjustment device (40) further includes a cover plate (49), one end of the cover plate (49) being connected to the fastener (47) and the other end being connected to the connecting portion (45).

19. A method for adjusting the pressure diffuser system according to claim 12, characterized in that: The adjustment method comprises the following steps: Step 1: Using a measuring tool, measure the gap between the diffuser (20) and the rotor (10); Step 2: adjusting the depth adjustment members (46) of the two gap adjustment devices (40) in the second set of gap adjustment units (44) to move the diffuser (20) up and down in the height direction; Step 3: adjusting the depth adjustment members (46) of the two gap adjustment devices (40) in the first group of gap adjustment units (43) to move the diffuser (20) left and right in the horizontal direction; Step 4: Fix each of the gap adjustment devices (40) in the first group of gap adjustment units (43) and the second group of gap adjustment units (44) to the cylinder body (30) through fasteners (47).

20. The adjustment method according to claim 19, characterized in that: In step 2, the two gap adjustment devices (40) in the second group of gap adjustment units (44) are moved toward each other by the depth adjustment member (46), and the diffuser (20) moves upward in the height direction, whereas the diffuser (20) moves downward in the height direction.

21. The adjustment method according to claim 19 or 20, characterized in that: Step 3 includes step S31, inserting the insertion rods (41) of the two gap adjustment devices (40) in the first group of gap adjustment units (43) into the groove (21), so that the first plane (411) is located on the left side of the insertion rod (41), the insertion rods (41) of the two gap adjustment devices (40) are symmetrically arranged, adjusting the depth adjustment member (46) to increase the depth of the insertion rod (41) into the groove (21) in the diffuser (20), and the insertion rod (41) drives the diffuser (20) to move horizontally to the left.

22. The adjustment method according to claim 21, characterized in that: Step 3 also includes step S32, inserting the insertion rods (41) of the two gap adjustment devices (40) in the first group of gap adjustment units (43) into the groove (21), so that the first plane (411) is located on the right side of the insertion rod (41), the insertion rods (41) of the two gap adjustment devices (40) are symmetrically arranged, and adjusting the depth adjustment member (46) to increase the depth of the insertion rod (41) into the groove (21) in the diffuser (20), thereby driving the diffuser (20) to move horizontally to the right.

23. The adjustment method according to claim 22, characterized in that: Step 3 also includes step S33, after adjusting the diffuser (20) to a preset position, adjusting the direction of the insertion rod (41) of any one of the gap adjustment devices (40) in the first group of gap adjustment units (43) so that the insertion rods (41) of the two gap adjustment devices (40) are set in opposite directions.

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