An engine compressor anti-surge adjustment mechanism

Abstract

This invention relates to an anti-surge adjustment mechanism for an engine compressor, comprising an anti-surge ring, a transmission rod, a sleeve, a pressure cap, and a control mechanism. This invention is applied to an axial-flow compressor in a small aero-engine, enabling intermediate-stage venting at low speeds and closing the venting at high speeds, thus expanding the compressor's stable operating margin. Simultaneously, compared to conventional anti-surge venting valves, the number of parts is reduced by approximately 90%, machining and assembly time is reduced by approximately 80%, and costs are reduced by approximately 80%, significantly lowering the overall engine cost.

Description

Technical Field

[0001] This invention relates to the field of compressor anti-surge technology, specifically to compressor anti-surge adjustment mechanisms, and particularly to a compressor anti-surge adjustment mechanism that is controllable, simple in structure, small in size, low in cost, and easy to process and assemble. Background Technology

[0002] To expand the compressor surge margin and the engine's stable operating range, it is usually necessary to bleed gas at a certain stage of the compressor and at low speeds. At the same time, to avoid affecting the engine's high-speed operating performance, the bleed gas needs to be shut off at high speeds.

[0003] Currently, the conventional compressor anti-surge adjustment mechanism is a vent valve structure, the structure of which is shown in [link to structural description]. Figure 1 It includes springs, pistons, valve covers, housings, valves, etc., and controls the opening and closing of valves through the pressure difference between the chambers. When the compressor requires a large amount of venting, multiple venting valves need to be designed.

[0004] The main problems with the above structure are as follows:

[0005] 1. When controlling multiple vent valves to release air, the control valves may move inconsistently, resulting in uneven air release and affecting the compressor's aerodynamic performance;

[0006] 2. The large number of parts, complex processing techniques, long assembly time, low efficiency, and high cost;

[0007] 3. It occupies a large space and cannot be used in small engines with external casings;

[0008] 4. Some venting valves require the use of high-pressure gas from downstream stages, resulting in complex structures.

[0009] A completely new compressor anti-surge adjustment mechanism needs to be designed to solve the problems of the general vent valve, such as a large number of parts, complex processing and assembly, long time consumption, low efficiency, high total cost, large space occupation, unstable aerodynamic performance and limited applicability. Summary of the Invention

[0010] The purpose of this invention is to provide a low-cost, controllable switch anti-surge adjustment mechanism that solves the problems of large number and variety of parts in general anti-surge vent valves, low efficiency, high cost, long processing time, large space occupation, and unstable aerodynamic performance. At the same time, it can be matched with the compressor structure of small engines with external bypass.

[0011] The technical solution of this invention is:

[0012] An anti-surge adjustment mechanism for an engine compressor is provided, comprising an anti-surge ring 1, a transmission rod 2, a sleeve 3, a pressure cap 4, and a control mechanism 5;

[0013] The anti-surge ring 1 includes a venting sealing ring 11 and an arc-shaped rack 12. The venting sealing ring 11 is circumferentially slidable on the outer ring surface of the compressor stator, and the outer ring surface of the compressor stator has a plurality of circumferentially distributed venting holes. The venting sealing ring 11 has the same number of through holes, and the through holes correspond one-to-one with the venting holes. Rotating the venting sealing ring can control the opening and closing of the venting holes. Opening allows the compressor stator to vent through the venting holes and through holes, and closing prevents the venting from passing through. The arc-shaped rack 12 is disposed on or integrally formed on the ring surface of the venting sealing ring 11, and the teeth of the arc-shaped rack extend parallel to the axial direction.

[0014] The transmission rod 2 includes a sector gear 21, a rod 22, and a limiting platform 23; the sleeve 3 is disposed in the radial mounting hole of the housing structure, and the rod is rotatably disposed through the sleeve; the sector gear 21 is coaxially formed at the inner end of the rod, and the sector gear 21 meshes with the arc-shaped rack; the limiting platform 23 is formed in the middle or upper part of the rod 22; the control mechanism 5 is connected to the rod and is used to drive the rotation of the rod; the pressure cover 4 is fixedly connected to the housing structure and forms an axial limit on the limiting platform.

[0015] The working principle of this invention is as follows: When sealing and releasing air, the control mechanism 5 is activated. The transmission rod 2 rotates at a certain angle under the drive of the control mechanism 5, driving the arc-shaped rack 12 on the anti-surge ring 1 to rotate circumferentially via the sector gear 21. The anti-surge ring 1 rotates at a certain angle under the drive of the arc-shaped rack 12, causing the through hole and the vent hole to be misaligned, thus achieving sealing and releasing air. When releasing air is required, the control mechanism 5 is activated, and according to the above rotation pattern, the anti-surge ring 1 rotates in the opposite direction at a certain angle, aligning the through hole and the vent hole one-to-one, thus achieving the venting function. Of course, the rotation angle can also be adjusted; adjusting the overlap area between the through hole and the vent hole can regulate the airflow rate, allowing for more precise anti-surge adjustment.

[0016] Furthermore, the sector gear 21, the rod 22, and the limiting platform 23 are integrally formed to constitute the transmission rod 2.

[0017] Furthermore, the anti-surge ring 1 is made of a lubricating plastic material, effectively reducing friction during rotation.

[0018] Furthermore, the inner diameter of the anti-surge ring 1 is fitted with a small clearance to the outer diameter of the compressor stator, thus achieving the function of sealing the gas.

[0019] Furthermore, the inner and outer walls of the anti-surge ring 1 have a serrated structure. This effectively reduces friction during rotation and enhances the sealing effect against gas.

[0020] Furthermore, the outer diameter of the sleeve 3 is fitted with the inner diameter of the mounting hole with a small clearance, and the inner diameter of the sleeve 3 is fitted with the outer diameter of the transmission rod 2 with a small clearance, thereby achieving the function of sealing the gas;

[0021] Furthermore, the sleeve 3 is made of a lubricating plastic material, which effectively reduces the friction when the transmission rod 2 rotates;

[0022] Furthermore, the inner and outer walls of the sleeve 3 are toothed, which effectively reduces the frictional force when the transmission rod 2 rotates;

[0023] Furthermore, the transmission rod 2 is in a flow-guiding shape. This reduces the impact of this structure on the aerodynamic performance of the bypass channel.

[0024] Furthermore, a circumferential limiter is provided on the outer diameter of the compressor stator corresponding to the aforementioned arc-shaped rack 12. This is used to limit the rotation angle range of the anti-surge ring 1 and prevent the rotation angle of the anti-surge ring 1 from exceeding the design range.

[0025] The advantages of this invention are: the low-cost, controllable anti-surge adjustment mechanism of this invention significantly reduces the number of parts, solving the problems of numerous parts, difficult management and assembly, and other issues associated with conventional anti-surge venting valves. It also occupies little space and is suitable for small engine compressor structures. Compared to commonly used anti-surge venting valves, the anti-surge adjustment mechanism of this invention reduces the number of parts by approximately 90%, processing and assembly time by approximately 80%, and costs by approximately 80%. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0027] Figure 2 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the venting process of the present invention;

[0029] Figure 4 This is a schematic diagram of the invention when it is closed.

[0030] Wherein: 1-Anti-surge ring, 11-Vent sealing ring, 12-Arch rack wheel, 13-Vent hole, 2-Transmission rod, 21-Sector gear, 22-Rod, 23-Limiting platform, 3-Sleeve, 4-Pressure cap, 5-Control mechanism, 6-Compressor stator, 61-Through hole. Detailed Implementation

[0031] The disclosed examples will be described more fully with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples may be described, and these examples should not be construed as limited to those set forth herein. Rather, these examples are described so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0032] An anti-surge adjustment mechanism for an engine compressor is provided, comprising an anti-surge ring 1, a transmission rod 2, a sleeve 3, a pressure cap 4, and a control mechanism 5;

[0033] The anti-surge ring 1 includes a venting sealing ring 11 and an arc-shaped rack 12. The venting sealing ring 11 is circumferentially slidable on the outer ring surface of the compressor stator, and the outer ring surface of the compressor stator has a plurality of circumferentially distributed venting holes 13. The venting sealing ring 11 has the same number of through holes, and the through holes correspond one-to-one with the venting holes. Rotating the venting sealing ring can control the opening and closing of the venting holes. Opening allows the compressor stator 6 to vent through the venting holes and through holes 61, and closing prevents the venting from passing through. The arc-shaped rack 12 is disposed on or integrally formed on the ring surface of the venting sealing ring 11, and the teeth of the arc-shaped rack extend parallel to the axial direction.

[0034] The transmission rod 2 includes a sector gear 21, a rod 22, and a limiting platform 23; the sleeve 3 is disposed in the radial mounting hole of the housing structure, and the rod is rotatably disposed through the sleeve; the sector gear 21 is coaxially formed at the inner end of the rod, and the sector gear 21 meshes with the arc-shaped rack; the limiting platform 23 is formed in the middle or upper part of the rod 22; the control mechanism 5 is connected to the rod and is used to drive the rotation of the rod; the pressure cover 4 is fixedly connected to the housing structure and forms an axial limit on the limiting platform.

[0035] The working principle of this invention is as follows: When sealing and releasing air, the control mechanism 5 is activated. The transmission rod 2 rotates at a certain angle under the drive of the control mechanism 5, driving the arc-shaped rack 12 on the anti-surge ring 1 to rotate circumferentially via the sector gear 21. The anti-surge ring 1 rotates at a certain angle under the drive of the arc-shaped rack 12, causing the through hole and the vent hole to be misaligned, thus achieving sealing and releasing air. When releasing air is required, the control mechanism 5 is activated, and according to the above rotation pattern, the anti-surge ring 1 rotates in the opposite direction at a certain angle, aligning the through hole and the vent hole one-to-one, thus achieving the venting function. Of course, the rotation angle can also be adjusted; adjusting the overlap area between the through hole and the vent hole can regulate the airflow rate, allowing for more precise anti-surge adjustment.

[0036] The sector gear 21, rod 22 and limiting platform 23 are integrally formed to constitute the transmission rod 2.

[0037] The anti-surge ring 1 is made of a lubricating plastic material, effectively reducing friction during rotation.

[0038] The inner diameter of the anti-surge ring 1 is fitted with a small clearance to the outer diameter of the compressor stator, thus achieving the function of sealing the gas.

[0039] The inner and outer walls of the anti-surge ring 1 have a serrated structure. This effectively reduces friction during rotation and enhances the sealing effect against gas.

[0040] The outer diameter of the sleeve 3 is fitted with the inner diameter of the mounting hole with a small clearance, and the inner diameter of the sleeve 3 is fitted with the outer diameter of the transmission rod 2 with a small clearance, thereby achieving the function of sealing the gas.

[0041] The sleeve 3 is made of a lubricating plastic material, which effectively reduces the friction when the transmission rod 2 rotates;

[0042] The inner and outer walls of the sleeve 3 are made of comb teeth, which effectively reduces the friction when the transmission rod 2 rotates;

[0043] Corresponding to the aforementioned arc-shaped rack 12, a circumferential limiter is provided on the outer diameter of the compressor stator. This is used to limit the rotation angle range of the anti-surge ring 1, preventing the rotation angle of the anti-surge ring 1 from exceeding the design range.

[0044] Descriptions of various advantageous arrangements have been shown for illustrative and descriptive purposes, but such descriptions are not intended to be exclusive or limited to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. Furthermore, different advantageous examples may describe different advantages compared to other advantageous examples. One or more examples have been selected and described in order to best illustrate the principles and practical application of the examples, and to enable those skilled in the art to understand that this disclosure contains various examples with various modifications suitable for the particular intended use.

Claims

1. An anti-surge adjustment mechanism for an engine compressor, characterized in that: It includes an anti-surge ring (1), a transmission rod (2), a sleeve (3), a pressure cap (4), and a control mechanism (5); The anti-surge ring 1 includes a venting sealing ring (11) and an arc-shaped rack (12). The venting sealing ring (11) is circumferentially slidable on the outer ring surface of the compressor stator, and the outer ring surface of the compressor stator has a plurality of venting holes distributed circumferentially. The venting sealing ring (11) has the same number of through holes, and the through holes correspond one-to-one with the venting holes. Rotating the venting sealing ring can control the opening and closing of the venting holes. Opening allows the compressor stator to vent through the venting holes and through holes, and closing prevents the venting from passing through. The arc-shaped rack (12) is disposed on or integrally formed on the ring surface of the venting sealing ring, and the teeth of the arc-shaped rack extend parallel to the axial direction. The transmission rod (2) includes a sector gear (21), a rod (22), and a limiting platform (23); the sleeve (3) is disposed in the radial mounting hole of the housing structure, and the rod is rotatably disposed through the sleeve; the sector gear (21) is coaxially formed at the inner end of the rod, and the sector gear (21) meshes with the arc-shaped rack; the limiting platform (23) is formed in the middle or upper part of the rod (22); the control mechanism (5) is connected to the rod and is used to drive the rotation of the rod; the pressure cover (4) is fixedly connected to the housing structure and forms an axial limit on the limiting platform.

2. The engine compressor anti-surge adjustment mechanism as described in claim 1, characterized in that: The sector gear (21), rod (22) and limiting platform (23) are integrally formed to constitute the transmission rod.

3. The engine compressor anti-surge adjustment mechanism as described in claim 1, characterized in that: The anti-surge ring 1 is made of a lubricating plastic material.

4. The engine compressor anti-surge adjustment mechanism as described in claim 1, characterized in that: The inner diameter of the anti-surge ring 1 is fitted with a small clearance to the outer diameter of the compressor stator.

5. The engine compressor anti-surge adjustment mechanism as described in claim 1, characterized in that: The inner and outer walls of the anti-surge ring have a comb-like structure.

6. The engine compressor anti-surge adjustment mechanism as described in claim 1, characterized in that: The outer diameter of the sleeve (3) is in a small clearance fit with the inner diameter of the mounting hole, and the inner diameter of the sleeve (3) is in a small clearance fit or a sliding friction fit with the outer diameter of the transmission rod (2).

7. The engine compressor anti-surge adjustment mechanism as described in claim 1, characterized in that: The sleeve (3) is made of a lubricating plastic material.

8. The engine compressor anti-surge adjustment mechanism as described in claim 1, characterized in that: The inner and outer walls of the sleeve (3) are of a comb-like structure.

9. The engine compressor anti-surge adjustment mechanism as described in claim 1, characterized in that: The transmission rod (2) has a flow guide shape.

10. The engine compressor anti-surge adjustment mechanism as described in claim 1, characterized in that: A circumferential limit is provided on the outer diameter of the compressor stator corresponding to the aforementioned arc-shaped rack (12).

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