Stationary blade adjusting structure of axial flow compressor and axial flow compressor
By adopting a ring-shaped drive ring and support base design in the axial compressor, the problems of unstable drive structure movement and inflexible blade adjustment are solved, realizing the flexibility of air volume adjustment and the accuracy of position, and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENYANG BLOWER WORKS GROUP CORP
- Filing Date
- 2025-06-18
- Publication Date
- 2026-05-01
AI Technical Summary
The existing axial compressor stator adjustment structure is difficult to balance the stability of the drive structure movement and the flexible adjustment of each stage of the blades, especially in large axial compressors, where the drive ring movement is unstable and the adjustment is not flexible enough.
The drive ring, which adopts a ring structure, drives the stationary blades to rotate through a linkage mechanism. The position of the drive ring is fixed in the axial direction by a support base to ensure movement stability and enable flexible adjustment of different stages of stationary blades.
It achieves flexibility and accuracy in adjusting the airflow of the axial compressor, avoids the problem of unstable movement of the drive ring, reduces production costs and improves installation stability.
Smart Images
Figure CN224187805U_ABST
Abstract
Description
A stator vane adjustment structure for an axial compressor and an axial compressor Technical Field
[0001] This utility model relates to the field of axial compressor technology, and in particular to a stator vane adjustment structure for an axial compressor and an axial compressor. Background Technology
[0002] Industrial axial compressors typically increase their operating range by changing the angle of the stator vanes. In this case, the stator vanes usually have a structure with a single-sided extended shaft, which is suspended on the compressor housing and drives the stator vanes to rotate by rotating the extended shaft.
[0003] Existing adjustable stator blade drive structures are typically axially parallel movement types, where the stator blade rotates via a single moving drive cylinder. Other designs use a circumferentially moving drive cylinder to rotate the stator blade, but these often struggle to balance the stability of the drive structure's movement with the flexible adjustment of each stage of the blades. Summary of the Invention
[0004] In view of this, in order to solve at least one of the above-mentioned technical problems, this utility model provides a stator vane adjustment structure for an axial flow compressor and an axial flow compressor.
[0005] To achieve the above objectives, this utility model mainly provides the following technical solutions:
[0006] On the one hand, this utility model provides a stator vane adjustment structure for an axial compressor, comprising:
[0007] Support base (100), the support base (100) is used to connect to the housing (200), and the support base (100) is provided with a guide groove (101);
[0008] A drive ring (300) includes a guide ring (301) that slides into a guide groove (101) and a drive port (302).
[0009] The linkage mechanism has one end movably plugged into the drive port (302) and the other end used to connect to the stationary blade (400);
[0010] The drive ring (300) is used to move circumferentially along the guide groove (101) under the action of external force, so as to drive the stationary blade (400) to rotate through the linkage mechanism.
[0011] Among them, there are multiple support seats (100), and the multiple support seats (100) are evenly distributed in the circumferential direction of the housing (200).
[0012] The housing (200) includes a support plane (201), and a support base (100) is fixed on the support plane (201) of the housing (200), and the support base (100) is in contact with the support plane (201).
[0013] The number and width of the support bases (100) are determined as follows:
[0014] Calculate the circumferential force driving the stationary blade (400);
[0015] Based on the circumferential force, determine the reaction force of all stationary blades (400) connected to the drive ring (300) on the drive ring (300);
[0016] The number and width of the support bases (100) are determined based on the magnitude of the reaction force.
[0017] The stator blade adjustment structure also includes:
[0018] Radial slider (500) and axial slider (600);
[0019] The radial slider (500) is located radially between the drive ring (300) and the support (100), and the axial slider (600) is located axially between the guide ring (301) and the guide groove (101).
[0020] Among them, a radial slider (500) is fixed on one side surface of the support base (100) relative to the drive ring (300), and the radial slider (500) is used to slide against the radial inner wall of the drive ring (300).
[0021] Axial sliders (600) are fixed on both sides of the guide ring (301), and the axial sliders (600) are used to slide against the axial sidewall of the guide groove (101).
[0022] The guide ring (301) is located on the inner circumference of the drive ring (300).
[0023] The linkage mechanism includes a drive block (700), a connecting rod (800), and a swing arm (900);
[0024] The drive block (700) is slidably embedded in the drive port (302), and the drive port (302) slides against the drive block (700) on both sides of the drive ring (300) in the circumferential direction. The drive block (700) can move radially and axially along the drive port (302).
[0025] The connecting rod (800) is connected to the drive block (700) and the swing arm (900) respectively. The swing arm (900) is connected to the stationary blade (400), and the swing arm (900) and the stationary blade (400) are circumferentially limited. When the drive ring (300) moves circumferentially, the drive block (700) moves circumferentially with the drive port (302), and drives the swing arm (900) to rotate through the connecting rod (800) to drive the stationary blade (400) to rotate.
[0026] The drive block (700) includes a connecting space, in which a bearing is fixed, and one end of the connecting rod (800) is inserted into the connecting space and connected to the bearing.
[0027] And / or, the drive port (302) is a notch, or the drive port (302) is a slot.
[0028] On the other hand, this application also provides an axial compressor, including a stator vane adjustment structure of an axial compressor as described in any of the above, and,
[0029] The housing (200) and the stationary blade (400) are rotatably connected to the housing (200).
[0030] This utility model proposes an axial flow compressor stator blade adjustment structure and an axial flow compressor, which mainly achieves the adjustment purpose by moving a drive ring and driving the stator blades to rotate through a linkage mechanism. In the prior art, a scheme using circumferential movement to drive the stator blade rotation is employed, but it is usually difficult to simultaneously ensure the stability of the drive structure movement and the flexible adjustment of each stage of the blades. Compared with the prior art, this application uses a ring-shaped drive ring to achieve individual adjustment of the circumferentially arranged single-stage stator blades. By controlling the movement of different drive rings, different degrees of adjustment of different stages of stator blades can be achieved, making the airflow adjustment of the axial flow compressor more flexible. Simultaneously, the support base fixes the position of the drive ring axially, ensuring the stability of the drive ring movement, preventing wobbling, and ensuring accurate positioning, thus avoiding the problem of unstable drive ring movement in large axial flow compressors. Attached Figure Description
[0031] Figure 1 is a cross-sectional schematic diagram of the stator blade adjustment structure and stator blade of an axial flow compressor provided in an embodiment of the present invention.
[0032] Figure 2 is a schematic diagram of the stator vane adjustment structure of an axial compressor provided in an embodiment of this utility model.
[0033] Figure 3 is a cross-sectional view of the casing and support base of an axial compressor provided in an embodiment of the present invention.
[0034] Figure 4 is a structural schematic diagram of the support base of the stator vane adjustment structure of an axial compressor provided in an embodiment of the present invention from a first perspective.
[0035] Figure 5 is a cross-sectional view of the support base of the stator vane adjustment structure of an axial compressor provided in an embodiment of the present invention from a second perspective.
[0036] Figure 6 is a partial cross-sectional view of a drive ring provided in an embodiment of the present invention. Detailed Implementation
[0037] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, describes the specific implementation, structure, features, and effects of a stator vane adjustment structure for an axial compressor proposed according to this utility model.
[0038] In one embodiment, as shown in Figures 1-2, the present invention provides a stator vane adjustment structure for an axial flow compressor, comprising:
[0039] Support base (100), the support base (100) is used to connect to the housing (200), and the support base (100) is provided with a guide groove (101);
[0040] A drive ring (300) includes a guide ring (301) that slides into a guide groove (101) and a drive port (302).
[0041] The linkage mechanism has one end movably plugged into the drive port (302) and the other end used to connect to the stationary blade (400);
[0042] The drive ring (300) is used to move circumferentially along the guide groove (101) under the action of external force, so as to drive the stationary blade (400) to rotate through the linkage mechanism.
[0043] The housing (200) is a cylindrical structure with multiple stages of stationary blades (400) arranged in a ring on its inner side. The blade portion of the stationary blades (400) extends towards the axis of the housing (200). One end of the rotating connecting rod of the stationary blade (400) is connected to the blade portion, and the other end passes through the opening of the housing (200) to connect to the linkage mechanism. The drive ring (300) is an annular structure used to connect the circumferentially arranged single-stage stationary blades (400). The guide ring (301) is a protruding annular structure on the drive ring (300) and protrudes towards the axis of the drive ring (300). The drive ring (300) connects to an external drive device, which can be a combination of a motor and a transmission mechanism. Each drive ring (300) can be connected to a separate drive device, or multiple drive rings (300) can have a linkage mechanism to move synchronously, which can be configured as needed.
[0044] The guide groove (101) of the support base (100) is a groove that extends along the circumferential direction of the housing (200) and opens upward. The guide groove (101) serves to limit the axial movement of the drive ring (300) and prevent the drive ring (300) from vibrating axially or deforming due to prolonged use, which could lead to positional deviation. There may be one, two, or more support bases (100).
[0045] The number of drive ports (302), linkage mechanisms, and stationary blades (400) are the same, and they are connected one-to-one. During the stationary blade angle adjustment process, the external drive device drives the drive ring (300) to move circumferentially, and the linkage mechanism transmits the circumferential movement as displacement, which is converted into driving the stationary blades (400) to rotate, thereby realizing the adjustment of the stationary blade (400) angle. More specific implementation methods will be described later.
[0046] This utility model proposes an axial flow compressor stator blade adjustment structure and an axial flow compressor, which mainly achieves the adjustment purpose by moving a drive ring and driving the stator blades to rotate through a linkage mechanism. In the prior art, a scheme using circumferential movement to drive the stator blade rotation is employed, but it is usually difficult to simultaneously ensure the stability of the drive structure movement and the flexible adjustment of each stage of the blades. Compared with the prior art, this application uses a ring-shaped drive ring to achieve individual adjustment of the circumferentially arranged single-stage stator blades. By controlling the movement of different drive rings, different degrees of adjustment of different stages of stator blades can be achieved, making the airflow adjustment of the axial flow compressor more flexible. Simultaneously, the support base fixes the position of the drive ring axially, ensuring the stability of the drive ring movement, preventing wobbling, and ensuring accurate positioning, thus avoiding the problem of unstable drive ring movement in large axial flow compressors.
[0047] In one embodiment, there are multiple support bases (100), which are evenly distributed around the casing (200). By distributing the support bases (100), installation and maintenance are facilitated, and the axial flow fan is made lighter, reducing production costs.
[0048] In one embodiment, as shown in FIG3, the housing (200) includes a support plane (201), and a support base (100) is fixed on the support plane (201) of the housing (200), and the support base (100) is in contact with the support plane (201).
[0049] The support plane (201) makes the connection between the support base (100) and the housing (200) more secure, the position of the support base (100) more stable, less prone to slippage, and reduces installation difficulty. The connection between the support base (100) and the housing (200) can be varied, such as machining two threaded holes and two locating pin holes on the support plane (201), and fixing the support base (100) with bolts (102) and locating pins (103), which facilitates assembly and improves stability. The assembly of the housing (200) and the support base (100) is machined as a whole, ensuring that the outer diameter of the support base (100) and the guide groove (101) meet the fitting requirements of the ring-mounted drive ring (300).
[0050] In one embodiment, the number and width of the support bases (100) are determined by: calculating the circumferential force of the driving stationary blades (400); determining the reaction force of all stationary blades (400) connected to the driving ring (300) on the driving ring (300) based on the circumferential force; and determining the number and width of the support bases (100) based on the magnitude of the reaction force.
[0051] As in this application, eight support seats (100) are provided in the circumferential direction, the width of the support seat (100) is 162.5mm, and the width of the guide groove (101) is 65mm.
[0052] In one embodiment, as shown in Figures 4-6, the stator vane adjustment structure further includes a radial slider (500) and an axial slider (600). The radial slider (500) is located radially between the drive ring (300) and the support base (100), and the axial slider (600) is located axially between the guide ring (301) and the guide groove (101).
[0053] Both the radial slider (500) and the axial slider (600) are plate-like structures, serving as isolation elements in the radial and axial directions, respectively. On one hand, the radial slider (500) and the axial slider (600) are small in size and easy to manufacture, improving machining accuracy and resulting in better limiting fit between the drive ring (300) and the support seat (100). On the other hand, they are easy to replace after prolonged use and wear, reducing operating costs.
[0054] Radial sliders (500) and axial sliders (600) can be connected to the support base (100) or to the drive ring (300). In one embodiment, a radial slider (500) is fixed to one side surface of the support base (100) relative to the drive ring (300), such as by a radial slider screw (501). The radial slider (500) is used to slide against the radial inner wall of the drive ring (300). Axial sliders (600) are fixed to both axial sides of the guide ring (301), such as by an axial slider screw (601). The axial sliders (600) are used to slide against the axial sidewall of the guide groove (101). The radial sliders (500) and axial sliders (600) are provided separately to ensure the structural strength of the support base (100) and the guide ring (301). The radial slider (500) can be located on both sides of the guide groove (101) to increase the contact area of the radial slider (500), or the radial slider (500) can also be set at the bottom of the guide groove (101).
[0055] In one embodiment, the guide ring (301) is located on the inner circumference of the drive ring (300) and is located at the middle position of the inner circumference of the drive ring (300) in the axial direction, so that the inner walls of the drive ring (300) on both sides of the guide ring (301) can abut against the support seat (100) or the radial slider (500), and the stability of the drive ring (300) is better.
[0056] In one embodiment, as shown in Figures 1-2, the linkage mechanism includes a drive block (700), a connecting rod (800), and a swing arm (900). The drive block (700) is slidably embedded in the drive port (302), and the drive port (302) slides against the drive block (700) on both sides of the drive ring (300) in the circumferential direction. The drive block (700) can move radially and axially along the drive port (302) of the drive ring (300). The connecting rod (800) is connected to the drive block (700) and the swing arm (900) respectively. The swing arm (900) is connected to the stationary blade (400), and the swing arm (900) and the stationary blade (400) are circumferentially limited. When the drive ring (300) moves circumferentially, the drive block (700) moves circumferentially along with the drive port (302), and drives the swing arm (900) to rotate through the connecting rod (800), thereby driving the stationary blade (400) to rotate.
[0057] The drive port (302) can be a notch opened axially on the side of the drive ring (300) opposite to the stationary blade (400), or it can be a groove with its opening facing the radially outward side of the drive ring (300). Taking the drive port (302) as an example, the stationary blade (400) can rotate relative to the housing (200) via a rotating connecting rod. The connecting head of the rotating connecting rod is rectangular or irregular in shape, and one end of the swing arm (900) is provided with a keyway or through hole that matches the connecting head of the rotating connecting rod. The rotating connecting rod is inserted into the swing arm (900) and fixed to achieve a circumferential linkage effect. The other end of the connecting rod (800) is connected to the swing arm (900) and the drive block (700), and the connection with at least one of them is a rotatable connection. For example, the connecting rod (800) can be rotatably connected to both the swing arm (900) and the drive block (700), or it can be rotatably connected only to the drive block (700) and circumferentially limited by the swing arm (900). The drive block (700) is embedded in the drive port (302). The drive block (700) is a cuboid, and the drive port (302) is a square notch.
[0058] The drive block (700) follows an arc-shaped trajectory as the drive ring (300) moves circumferentially, and moves along the drive port (302). Taking the direction in Figure 2 as an example, under external drive, the drive ring (300) drives the drive block (700) to move upward, and the drive block (700) moves to the right at the same time. Under the traction of the drive block (700), the swing arm (900) rotates clockwise around the connection position with the rotating connecting rod, thereby driving the rotating connecting rod and the blade part to rotate clockwise, so that the stationary blade (400) angle opens. When the stationary blade (400) needs to be closed, the drive ring (300) drives the drive block (700) to move downward under external drive, which is the opposite of the above, and will not be described again.
[0059] In one embodiment, the drive block (700) includes a connecting space in which a bearing is fixed. One end of a connecting rod (800) is inserted into the connecting space and connected to the bearing. This ensures smooth rotational connection between the connecting rod (800) and the drive block (700), preventing jamming that could affect the movement of the drive ring (300). The connecting space also protects the bearing, preventing dust accumulation and subsequent obstruction of movement.
[0060] On the other hand, this application also provides an axial compressor, including a stator vane adjustment structure of an axial compressor as described in any of the above embodiments, and a housing (200) and stator vanes (400), the stator vanes (400) being rotatably connected to the housing (200). The axial compressor includes the stator vane adjustment structure of the axial compressor according to any of the foregoing embodiments, and the advantages of including the stator vane adjustment structure of the axial compressor according to any of the foregoing embodiments are not repeated here.
[0061] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A stator vane adjustment structure for an axial flow compressor, characterized in that, include: A support base (100) is used to connect to the housing (200), and a guide groove (101) is provided on the support base (100); a drive ring (300) includes a guide ring (301), the guide ring (301) is slidably embedded in the guide groove (101), and the drive ring (300) includes a drive port (302); a linkage mechanism is movably inserted into the drive port (302) at one end and used to connect to the stationary blade (400) at the other end; the drive ring (300) is used to move circumferentially along the guide groove (101) under the action of external force, so as to drive the stationary blade (400) to rotate through the linkage mechanism.
2. The stator vane adjustment structure of the axial compressor according to claim 1, characterized in that, There are multiple support bases (100), and the multiple support bases (100) are evenly distributed in the circumferential direction of the housing (200).
3. The stator vane adjustment structure of the axial compressor according to claim 1, characterized in that, The housing (200) includes a support plane (201), the support base (100) is fixed on the support plane (201), and the support base (100) is in contact with the support plane (201).
4. The stator vane adjustment structure of the axial compressor according to claim 1, characterized in that, The number and width of the support base (100) are determined by: calculating the circumferential force driving the stationary blade (400); determining the reaction force of all the stationary blades (400) connected to the drive ring (300) on the drive ring (300) based on the circumferential force; and determining the number and width of the support base (100) based on the magnitude of the reaction force.
5. The stator vane adjustment structure of the axial compressor according to claim 1, characterized in that, It also includes: a radial slider (500) and an axial slider (600); the radial slider (500) is located radially between the drive ring (300) and the support base (100), and the axial slider (600) is located axially between the guide ring (301) and the guide groove (101).
6. The stator vane adjustment structure of the axial compressor according to claim 5, characterized in that, The radial slider (500) is fixed on one side surface of the support base (100) relative to the drive ring (300), and the radial slider (500) is used to slide against the radial inner wall of the drive ring (300); the axial slider (600) is fixed on both axial sides of the guide ring (301), and the axial slider (600) is used to slide against the axial side wall of the guide groove (101).
7. The stator vane adjustment structure of the axial compressor according to claim 1, characterized in that, The guide ring (301) is located on the inner circumference of the drive ring (300) and is located at the axial center position.
8. The stator vane adjustment structure of the axial compressor according to claim 1, characterized in that, The linkage mechanism includes a drive block (700), a connecting rod (800), and a swing arm (900); the drive block (700) is slidably embedded in the drive port (302), and the drive port (302) slides against the drive block (700) on both sides of the drive ring (300) in the circumferential direction; the drive block (700) can move radially and axially along the drive port (302) of the drive ring (300); the connecting rod (800) is respectively connected to... The drive block (700) is connected to the swing arm (900), the swing arm (900) is connected to the stationary blade (400), and the swing arm (900) and the stationary blade (400) are circumferentially limited. When the drive ring (300) moves circumferentially, the drive block (700) moves circumferentially with the drive port (302), and drives the swing arm (900) to rotate through the connecting rod (800) to drive the stationary blade (400) to rotate.
9. The stator vane adjustment structure of the axial compressor according to claim 8, characterized in that, The drive block (700) includes a connecting space in which a bearing is fixed, one end of the connecting rod (800) is inserted into the connecting space and connected to the bearing; and / or, the drive port (302) is a notch, or the drive port (302) is a groove.
10. An axial flow compressor, characterized in that, The compressor includes a stator vane adjustment structure for an axial flow compressor as described in any one of claims 1-9, and the housing (200) and the stator vane (400), the stator vane (400) being rotatably connected to the housing (200).