Outer culvert flow regulating valve directly driven by actuating cylinder

Abstract

The invention belongs to the technical field of aero-engines, and particularly relates to an outer culvert flow regulating valve directly driven by an actuating cylinder, which comprises a casing, a first baffle ring, a driving block, a regulating ring, a second baffle ring and the actuating cylinder, the first baffle ring and the second baffle ring are arranged on the inner side of the casing in a sleeved mode, a gap is formed between the first baffle ring and the second baffle ring in the axial direction of engine oil, the gap forms an annular sliding groove, and the adjusting ring is installed in the sliding groove. One position of the adjusting ring is outwards connected with a driving block in the radial direction, the casing is provided with an open hole which allows the driving block to penetrate through and has a circumferential rotation stroke, and an actuating cylinder connected with the outer side of the casing is connected with the driving block so as to drive the adjusting ring to rotate in the annular sliding groove; the adjusting ring is provided with circulation windows distributed in the circumferential direction. The first baffle ring and the second baffle ring are both provided with grids corresponding to the circulation windows, the adjusting ring rotates by different angles, and the gas circulation area of the outer culvert channel is changed.

Description

Technical Field

[0001] This application belongs to the field of aero-engine technology, and specifically relates to an external bypass flow regulating valve that is directly driven by an actuator. Background Technology

[0002] Variable cycle engines employ specialized regulating mechanisms to alter the flow distribution between the inner and outer bypass ducts, enabling continuous switching between different thermodynamic cycles. The outer bypass flow control valve, a component of this mechanism, adjusts the flow area of ​​the outer bypass duct to meet engine matching requirements under varying conditions. With advancements in variable cycle engine technology, to meet overall engine matching needs, the adjustment range for parameters such as outer bypass flow area, flow rate, and pressure has increased. Furthermore, the requirements for the regulating mechanism's adjustment accuracy and weight have become increasingly stringent. The outer bypass area is adjusted by driving the actuator through mechanical movements such as the actuator cylinder and drive shaft at the circumferential intake window. To achieve a wide range of bypass area adjustments, the actuator's adjustment stroke needs to be increased, resulting in a long transmission chain and low transmission efficiency. Moreover, during long-term use, issues such as rocker arm deformation and drive shaft deflection can cause the actuator's output to deviate from the design value, leading to decreased adjustment accuracy of the outer bypass flow control valve and potentially affecting overall engine matching. Summary of the Invention In order to solve the above problems, this application provides an external flow regulating valve directly driven by an actuator, comprising: a housing, a first retaining ring, a drive block, an adjusting ring, a second retaining ring, and an actuator;

[0003] The first retaining ring and the second retaining ring are respectively fitted inside the casing. The gap between the first retaining ring and the second retaining ring in the axial direction forms an annular groove. An adjusting ring is installed in the groove. A drive block is radially connected to one position of the adjusting ring. The casing has an opening through which the drive block passes and has a circumferential rotation stroke. An actuating cylinder connected to the outside of the casing is connected to the drive block to drive the adjusting ring to rotate in the annular groove.

[0004] The regulating ring has circumferentially distributed flow windows; the first and second baffle rings each have grids corresponding to the flow windows. When the regulating ring is rotated at different angles, the grids of the first and second baffle rings correspond to different areas of the flow windows, thereby changing the gas flow area of ​​the outer bypass channel.

[0005] Preferably, the first and second baffle rings are annular structures with guide vanes forming the grid.

[0006] Preferably, the maximum rotation angle of the adjusting ring is less than 5°.

[0007] Preferably, the adjusting ring and the drive block are fixedly connected by an interference fit pin.

[0008] Preferably, the opening adopts a double-layer floating sealing structure to contact and connect with the drive block, thereby improving the sealing performance at the mating point between the drive block and the casing and preventing air leakage.

[0009] Preferably, the inner edge of the adjusting ring extends circumferentially to form a stop, which overlaps with the edge of the first or second retaining ring to limit the radial runout of the adjusting ring.

[0010] Preferably, the first retaining ring or the second retaining ring is fixed to the turbine outer ring casing by bolt fasteners.

[0011] This application achieves the purpose of adjusting the flow area of ​​the culvert by adjusting the circumferential rotation of the adjusting ring. Its advantages are: the adjusting ring is a ring structure with multiple flow windows, which cooperates with the stop block and the grid; a small rotation angle of the adjusting ring can achieve a wide range of adjustments to the flow area of ​​the culvert; the scheme of directly adjusting the circumferential rotation of the ring using an actuator reduces the traditional adjusting mechanism composed of rocker arms and drive shafts, not only improving transmission efficiency and adjustment accuracy, but also reducing the weight of the culvert flow regulating valve system. Attached Figure Description

[0012] Figure 1 An external flow regulating valve that is directly driven by an actuator.

[0013] Figure 2 A schematic diagram of the regulating ring structure of an external flow regulating valve directly driven by an actuator.

[0014] Figure 3 A schematic diagram of the connection and fixing structure of an external flow regulating valve directly driven by an actuator.

[0015] Figure 4 A structural diagram of the maximum flow area of ​​an external flow regulating valve directly driven by an actuator.

[0016] Figure 5 A structural diagram of the minimum flow area of ​​an external flow regulating valve directly driven by an actuator.

[0017] Figure 6 A schematic diagram of the connection structure between the regulating ring and the transition block of an external flow regulating valve that is directly driven by an actuator. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings. Figures 1-6 As shown, in order to solve the above problems, this application provides an external flow regulating valve directly driven by an actuator, including: a housing 1, a first retaining ring 5, a drive block 6, an regulating ring 4, a second retaining ring 3, and an actuator 2;

[0019] The first retaining ring 5 and the second retaining ring 3 are respectively fitted inside the casing 1. The first retaining ring 5 and the second retaining ring 3 have a gap in the axial direction, which forms an annular groove. The adjusting ring 4 is installed in the groove. A drive block 6 is radially connected to one position of the adjusting ring 4. The casing 1 has an opening through which the drive block 6 passes and has a circumferential rotation stroke. The actuating cylinder 2 connected to the outside of the casing 1 is connected to the drive block 6 to drive the adjusting ring 4 to rotate in the annular groove.

[0020] The regulating ring 4 has circumferentially distributed flow windows; the first baffle ring 5 and the second baffle ring 3 each have a grid corresponding to the flow windows. When the regulating ring 4 rotates at different angles, the areas of the grids of the first baffle ring 5 and the second baffle ring 3 corresponding to the flow windows are different, thereby changing the gas flow area of ​​the outer bypass channel. Since the rotation angle of the regulating ring 4 is small, the adjustment requirement of the regulating ring can be achieved with a short stroke of the actuator 2. Therefore, the adjustment method of the regulating ring by directly adjusting the actuator is adopted.

[0021] By directly driving the regulating ring to rotate using an actuator, the traditional regulating mechanism consisting of a rocker arm and a drive shaft is reduced, which not only improves transmission efficiency and regulation accuracy, but also reduces the weight of the external flow regulating valve system.

[0022] In some alternative embodiments, the first baffle ring 5 and the second baffle ring 3 are annular structures with guide vanes forming the grid.

[0023] In some alternative implementations, the maximum rotation angle of the adjusting ring is less than 5°.

[0024] In some alternative embodiments, the adjusting ring 4 and the drive block 6 are fixedly connected by an interference fit pin 9.

[0025] In some alternative embodiments, the opening is connected to the drive block 6 by a double-layer floating sealing structure 11, which improves the sealing performance of the drive block 6 and the housing 1 and prevents air leakage.

[0026] In some alternative embodiments, the inner edge of the adjusting ring 4 extends circumferentially to form a stop, which overlaps with the edge of the first retaining ring 5 or the second retaining ring 3 to limit the radial runout of the adjusting ring 4.

[0027] In some alternative embodiments, the first retaining ring 5 or the second retaining ring 3 is fixed to the turbine outer ring casing 10 by bolt fasteners.

[0028] This application achieves the purpose of adjusting the flow area of ​​the culvert by adjusting the circumferential rotation of the adjusting ring. Its advantages are: the adjusting ring is a ring structure with multiple flow windows, which cooperates with the stop block and the grid; a small rotation angle of the adjusting ring can achieve a wide range of adjustments to the flow area of ​​the culvert; the scheme of directly adjusting the circumferential rotation of the ring using an actuator reduces the traditional adjusting mechanism composed of rocker arms and drive shafts, not only improving transmission efficiency and adjustment accuracy, but also reducing the weight of the culvert flow regulating valve system.

[0029] In one embodiment, the first retaining ring (5) has circumferentially distributed retaining blocks, and the second retaining ring (3) has circumferentially distributed grilles. When the retaining blocks, grilles, and adjusting ring are in the same circumferential position, the maximum flow area of ​​the outer bypass duct is achieved. When the retaining blocks, grilles, and adjusting ring are circumferentially offset, the minimum flow area of ​​the outer bypass duct is achieved. The adjustment rotates circumferentially around the engine axis, which can achieve a large range of outer bypass duct area adjustment within a small angle. Therefore, the adjustment method of directly driving the adjusting ring to rotate circumferentially with an actuator reduces the traditional adjustment mechanism composed of rocker arms, drive shafts, etc., shortens the transmission path, and improves transmission efficiency and adjustment accuracy; at the same time, it can also achieve the effect of weight reduction.

[0030] The above description is merely a specific embodiment of this application, but the scope of protection of this application 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 application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A bypass flow regulating valve directly driven by an actuator, characterized in that, include: The casing (1), the first retaining ring (5), the drive block (6), the adjusting ring (4), the second retaining ring (3), and the actuating cylinder (2); The first retaining ring (5) and the second retaining ring (3) are respectively fitted inside the casing (1). The gap between the first retaining ring (5) and the second retaining ring (3) in the axial direction of the oil is formed by the gap to form an annular groove. The adjusting ring (4) is installed in the groove. A drive block (6) is radially connected to one position of the adjusting ring (4). The casing (1) has an opening through which the drive block (6) passes and has a circumferential rotation stroke. The actuating cylinder (2) connected to the outside of the casing (1) is connected to the drive block (6) to drive the adjusting ring (4) to rotate in the annular groove. Among them, the regulating ring (4) has a circumferentially distributed flow window; the first baffle ring (5) and the second baffle ring (3) both have a grid corresponding to the flow window. When the regulating ring (4) rotates at different angles, the grids of the first baffle ring (5) and the second baffle ring (3) have different areas corresponding to the flow window, thereby changing the gas flow area of ​​the outer bypass channel.

2. The external flow regulating valve with direct drive by an actuator as described in claim 1, characterized in that, include: The first baffle ring (5) and the second baffle ring (3) are annular structures with guide vanes, which form the grid.

3. The external flow regulating valve with direct drive by an actuator as described in claim 1, characterized in that, The maximum rotation angle of the adjusting ring is less than 5°.

4. The external flow regulating valve with direct drive by an actuator as described in claim 1, characterized in that, The adjusting ring (4) and the drive block (6) are fixedly connected by an interference fit pin (9).

5. The external flow regulating valve with direct drive by an actuator as described in claim 1, characterized in that, The opening adopts a double-layer floating sealing structure (11) to contact and connect with the drive block (6), which improves the sealing performance of the drive block (6) and the casing (1) and prevents air leakage.

6. The external flow regulating valve with direct drive by an actuator as described in claim 1, characterized in that, The inner edge of the adjusting ring (4) extends circumferentially to form a stop, which overlaps with the edge of the first stop ring (5) or the second stop ring (3) to limit the radial runout of the adjusting ring (4).

7. The external flow regulating valve with direct drive by an actuator as described in claim 1, characterized in that, The first retaining ring (5) or the second retaining ring (3) is fixed to the turbine outer ring casing (10) by bolt fasteners.

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