A connection structure between inner and outer actuator linkage rings of an outer casing and its assembly method

Abstract

The present application belongs to the technical field of design of connection between linkage rings of inner and outer actuator cylinders of an aircraft engine stator blade angle adjustment mechanism located in an outer casing, and specifically relates to a connection structure between linkage rings of inner and outer actuator cylinders of an outer casing and an assembly method thereof, wherein the connection structure between linkage rings of inner and outer actuator cylinders of an outer casing comprises: an inner transmission shaft located on the inner side of the outer casing, one end of which has end teeth, and an inner rocker arm formed on the outer wall of the other end; the inner rocker arm is hinged to the linkage ring located on the inner side of the outer casing; an outer transmission shaft, one end of which has an outer rocker arm formed on the outer wall, and the other end passes through the transmission hole on the outer casing and extends into the inner side of the outer casing, and the end has end teeth; the outer rocker arm is hinged to the actuator located on the outer side of the outer casing; a connecting bolt, the screw of which axially penetrates the outer transmission shaft, is screwed on the end of the inner transmission shaft with end teeth, connects the inner transmission shaft and the outer transmission shaft, and makes the ends of the inner transmission shaft and the outer transmission shaft with end teeth mesh with each other.

Description

Technical Field

[0001] The present application belongs to the technical field of design of connection between linkage rings of inner and outer actuators of an aircraft engine stator blade angle adjustment mechanism located in an outer casing, and specifically relates to a connection structure between linkage rings of inner and outer actuators of an outer casing and an assembly method thereof. Background Art

[0002] In order to ensure the stable operation of the aircraft engine, the air flow rate of the flow channel needs to be adjusted according to the actual situation. For this purpose, the angle of each stator blade in the setting is adjustable. The angle adjustment mechanism is used to adjust the synchronous rotation of each stator blade to synchronously change the angle of each stator blade, thereby realizing the adjustment of the air flow rate of the flow channel.

[0003] Each stator blade in an aircraft engine is arranged between the stator casing and the inner ring and distributed along the circumferential direction. The lower journal of each stator blade is inserted into the mounting hole on the stator inner ring, and the upper journal extends from the mounting hole on the stator casing.

[0004] The existing angle adjustment mechanism mainly includes a linkage ring and an actuator cylinder, wherein the linkage ring is sleeved on the outer periphery of the stator casing and is connected to the upper shaft neck of each stator blade extending out of the stator casing mounting hole through a rocker arm, or is directly engaged. The actuator cylinder is connected between the stator casing and the linkage ring to drive the linkage ring to move, and then drive the various stator blades to rotate synchronously, thereby realizing synchronous adjustment of the rotation angle of each stator blade.

[0005] In some models of aircraft engines, there is an outer casing outside the stator casing. In this case, the space between the stator casing and the outer casing is limited, which makes it inconvenient to arrange the actuator on the stator casing. In this case, the actuator is usually connected to the outer casing, and a transmission hole is opened on the outer casing. A transmission shaft is passed through the transmission hole to connect the actuator and the linkage ring located inside and outside the outer casing. The transmission shaft and the linkage ring are connected by a drum spline. The actuator drives the linkage ring to move through the transmission shaft to synchronously adjust the rotation angle of each stator blade. This technical solution has the following defects:

[0006] 1) The drum spline requires high machining precision and is difficult to process;

[0007] 2) The contact stress on the working surface of the drum spline is high during operation, which is prone to wear and poor stability, affecting the accuracy of adjusting the rotation angle of the stator blades;

[0008] 3) When the actuator is in motion, micro-friction is likely to occur between the transmission shaft and the linkage ring, aggravating structural damage and affecting the accuracy of adjusting the rotation angle of the stator blades.

[0009] This application is proposed in view of the above-mentioned technical defects.

[0010] It should be noted that the disclosure of the above background technology content is only used to assist in understanding the inventive concept and technical solution of the present invention, and it does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this application, the above background technology should not be used to evaluate the novelty and creativity of this application. Summary of the Invention

[0011] The purpose of the present application is to provide a connection structure between the inner and outer actuating cylinder linkage rings of an outer casing and an assembly method thereof, so as to overcome or alleviate at least one of the technical defects of the known ones.

[0012] The technical solution of this application is:

[0013] A connection structure between inner and outer actuator linkage rings of an outer casing, comprising:

[0014] An inner transmission shaft is located inside the outer casing, has end teeth at one end, and an inner rocker arm is formed on the outer wall of the other end; the inner rocker arm is hinged to a linkage ring located inside the outer casing;

[0015] An outer transmission shaft, one end of which is formed with an outer rocker arm on the outer wall, and the other end of which passes through the transmission hole on the outer casing and extends into the inner side of the outer casing, and has end teeth; the outer rocker arm is hinged to the actuator cylinder located on the outer side of the outer casing;

[0016] The connecting bolt has a screw rod which penetrates the outer transmission shaft axially and is screwed to the end of the inner transmission shaft with end teeth, connecting the inner transmission shaft and the outer transmission shaft so that the ends of the inner transmission shaft and the outer transmission shaft with end teeth are meshed with each other.

[0017] According to at least one embodiment of the present application, in the above-mentioned connection structure between the inner and outer actuator rings of the outer casing, a positioning hole is provided on the stator casing located on the inner side of the outer casing;

[0018] One end of the inner transmission shaft extending into the inner side of the outer casing is provided with a positioning protrusion;

[0019] The positioning protrusion extends into the positioning hole.

[0020] According to at least one embodiment of the present application, the connection structure between the inner and outer actuator linkage rings of the outer casing further includes:

[0021] The spherical bushing is sleeved on the positioning protrusion and arranged in the positioning hole.

[0022] According to at least one embodiment of the present application, in the connection structure between the inner and outer actuator linkage rings of the outer casing, the head of the positioning protrusion extends from the spherical bushing;

[0023] Also includes:

[0024] The locking nut is screwed onto the head of the positioning protrusion and rests against the inner side of the stator casing.

[0025] According to at least one embodiment of the present application, in the connection structure between the inner and outer actuator linkage rings of the outer casing, the inner rocker arm and the linkage ring are hinged by an inner connecting rod;

[0026] The inner rocker arm and the actuator are hinged by the outer connecting rod.

[0027] On the other hand, a method for assembling a connection structure between inner and outer actuator linkage rings of an outer casing is provided, comprising:

[0028] A spherical bushing is provided in the positioning hole of the stator casing;

[0029] Insert the positioning protrusion on the inner transmission shaft through the spherical bushing into the inner side of the stator casing and tighten the locking nut;

[0030] Hinge the inner rocker arm on the inner drive shaft to the linkage ring;

[0031] The outer transmission shaft is passed through the transmission hole on the outer casing, and the screw of the connecting bolt is passed through the outer transmission shaft in the axial direction and screwed to the end of the inner transmission shaft with the end teeth, so that the ends of the inner transmission shaft and the outer transmission shaft with the end teeth are meshed with each other;

[0032] Hinge the outer rocker arm on the outer drive shaft to the actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the connection structure between the inner and outer actuator linkage rings of the outer casing provided by an embodiment of the present application;

[0034] in:

[0035] 1-Inner drive shaft; 2-Outer casing; 3-Inner rocker arm; 4-Outer drive shaft; 5-Outer rocker arm; 6-Connecting bolt; 7-Stator casing; 8-Spherical bushing; 9-Locking nut; 10-Inner connecting rod; 11-Outer connecting rod.

[0036] In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and should not be understood as limitations on this patent. DETAILED DESCRIPTION

[0037] To make the technical solution and its advantages of the present application clearer, the technical solution of the present application will be described in further detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of the present application and are only used to explain the present application, not to limit the present application. It should be noted that, for ease of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0038] In addition, unless otherwise defined, the technical or scientific terms used in the description of this application should have the ordinary meanings understood by those of ordinary skill in the art to which this application belongs. The words "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," and "outer" used in the description of this application are only used to indicate relative directions or positional relationships, and do not imply that the device or component must have a specific orientation, be constructed, or operate in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. Therefore, they should not be understood as limitations on this application. The words "first," "second," "third," and similar terms used in the description of this application are used only for descriptive purposes to distinguish different components and should not be understood to indicate or imply relative importance. The words "one," "an," or "the" used in the description of this application should not be understood as absolute limitations on quantity, but should be understood as meaning the presence of at least one. The words "include" or "comprises" used in the description of this application mean that the element or object listed before the word includes the elements or objects listed after the word and their equivalents, but does not exclude other elements or objects.

[0039] In addition, it should be noted that, unless otherwise clearly stipulated and limited, the words "install", "connect", "connect" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. Technical personnel in the field can understand their specific meanings in this application according to the specific circumstances.

[0040] The following is combined with Figure 1 This application is described in further detail.

[0041] A connection structure between inner and outer actuator linkage rings of an outer casing, comprising:

[0042] The inner transmission shaft 1 is located inside the outer casing 2, has end teeth at one end, and an inner rocker arm 3 is formed on the outer wall of the other end; the inner rocker arm 3 is hinged to the linkage ring located inside the outer casing 2;

[0043] An outer transmission shaft 4 has an outer rocker arm 5 formed on its outer wall at one end, and the other end thereof passes through a transmission hole on the outer casing 2 and extends into the inner side of the outer casing 2. This end has end teeth; the outer rocker arm 5 is hinged to an actuator located on the outer side of the outer casing 2;

[0044] The connecting bolt 6 has a screw rod that axially penetrates the outer transmission shaft 4 and is screwed onto the end of the inner transmission shaft 1 having end teeth, connecting the inner transmission shaft 1 and the outer transmission shaft 4 so that the ends of the inner transmission shaft 1 and the outer transmission shaft 4 having end teeth engage with each other.

[0045] As for the connection structure between the inner and outer actuator cylinders and the linkage rings of the outer casing disclosed in the above-mentioned embodiment, it can be understood by those skilled in the art that the designed aircraft engine stator blade angle adjustment mechanism is located between the inner and outer actuator cylinders and the linkage rings of the outer casing 2, and is connected as a whole to the inner transmission shaft 1 and the outer transmission shaft 4 which are arranged through the transmission hole on the casing 2. The inner transmission shaft 1 is hinged to the linkage ring with the inner rocker arm 3 formed thereon, and the outer transmission shaft 4 is hinged to the actuator cylinder with the outer rocker arm 5 formed thereon. It is easy to process and assemble, has a low probability of wear, and can ensure the accuracy of adjusting the rotation angle of the stator blades.

[0046] Regarding the connection structure between the inner and outer actuator linkage rings of the outer casing disclosed in the above embodiment, it can be understood by those skilled in the art that the inner transmission shaft 1 and the outer transmission shaft 4 are connected by connecting bolts 6 that pass through the outer transmission shaft 4 to facilitate assembly. The details can be referred to as follows:

[0047] Hinging the inner rocker arm 3 on the inner transmission shaft 1 to the linkage ring;

[0048] Insert the outer transmission shaft 4 through the transmission hole on the outer casing 2;

[0049] The screw of the connecting bolt 6 axially penetrates the outer transmission shaft 4 and is screwed to the end of the inner transmission shaft 1 having the end teeth, so that the ends of the inner transmission shaft 1 and the outer transmission shaft 4 having the end teeth are meshed with each other;

[0050] The outer rocker arm 5 on the outer transmission shaft 4 is hinged to the actuator.

[0051] It can be seen from the above assembly process that the inner rocker arm 3 and the outer rocker arm 5 formed on the inner transmission shaft 1 and the outer transmission shaft 4 during the assembly process do not need to pass through the transmission hole on the outer casing 2. The transmission hole can be designed to have a relatively small size to avoid serious damage to the rigidity of the outer casing 2 and ensure the airtightness of the outer casing 2. The end teeth on the inner transmission shaft 1 and the outer transmission shaft 4 can be reliably engaged together under the connecting action of the connecting bolt 6, ensuring reliable torque transmission between the inner and outer actuators and the linkage rings of the outer casing 2.

[0052] In some optional embodiments, in the above-mentioned connection structure between the inner and outer actuator linkage rings of the outer casing, a positioning hole is provided on the stator casing 7 located on the inner side of the outer casing 2;

[0053] One end of the inner transmission shaft 1 extending into the inner side of the outer casing 2 has a positioning protrusion;

[0054] The positioning protrusion extends into the positioning hole, thereby cooperating with the transmission hole on the outer casing 2 to reliably support the entirety of the inner transmission shaft 1 and the outer transmission shaft 4, thereby ensuring the stability of the transmission between the actuator and the linkage ring.

[0055] In some optional embodiments, the above-mentioned connection structure between the inner and outer actuator linkage rings of the outer casing further includes:

[0056] The spherical bushing 8 is sleeved on the positioning protrusion and arranged in the positioning hole to compensate for the angular deviation of the inner transmission shaft 1.

[0057] In some optional embodiments, in the above-mentioned connection structure between the inner and outer actuator linkage rings of the outer casing, the head of the positioning protrusion extends from the spherical bushing 8;

[0058] Also includes:

[0059] The locking nut 9 is screwed onto the head of the positioning protrusion and rests against the inner side of the stator casing 7 .

[0060] In some optional embodiments, in the above-mentioned connection structure between the inner and outer actuator linkage rings of the outer casing, the inner rocker arm 3 and the linkage ring are hinged by the inner connecting rod 10;

[0061] The inner rocker arm 5 and the actuator are hinged by the outer connecting rod 11.

[0062] In the above-mentioned connection structure between the inner and outer actuator linkage rings of the outer casing, the so-called hinge can be specifically hinged by the cooperation of a single and double ear structure and a pin shaft. Other methods can also be used for hinge, and no further detailed explanation will be given here.

[0063] On the other hand, a method for assembling a connection structure between inner and outer actuator linkage rings of an outer casing is provided, comprising:

[0064] A spherical bushing 8 is provided in the positioning hole of the stator casing 7;

[0065] Insert the positioning protrusion on the inner transmission shaft 1 through the spherical bushing 8 and into the inner side of the stator casing 7, and tighten the locking nut 9;

[0066] Hinging the inner rocker arm 3 on the inner transmission shaft 1 to the linkage ring;

[0067] Insert the outer transmission shaft 4 through the transmission hole on the outer casing 2, and use the screw of the connecting bolt 6 to axially penetrate the outer transmission shaft 4 and screw it to the end of the inner transmission shaft 1 with the end teeth, so that the ends of the inner transmission shaft 1 and the outer transmission shaft 4 with the end teeth are meshed with each other;

[0068] The outer rocker arm 5 on the outer transmission shaft 4 is hinged to the actuator.

[0069] In some optional embodiments, the outer casing 2 is set to a split structure, and its transmission port is located at the split part. When assembling the connection structure between the inner and outer actuator linkage rings of the outer casing, the stator casing 7 and the spherical bushing 8, the inner transmission shaft 1, the locking nut 9, the linkage ring, and the outer transmission shaft 4 can be assembled first, and then the outer casing 2 and the actuator are assembled.

[0070] The method for assembling the connection structure between the inner and outer actuator rings of the outer casing disclosed in the above embodiment is used to realize the assembly of the connection structure between the inner and outer actuator rings of the outer casing disclosed in the above embodiment. The description is relatively simple. For specific related matters, please refer to the relevant description of the connection structure between the inner and outer actuator rings of the outer casing. Its technical effects can also refer to the technical effects of the relevant parts of the connection structure between the inner and outer actuator rings of the outer casing, which will not be repeated here.

[0071] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to in detail.

[0072] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or replacements to the relevant technical features, and the technical solutions after these changes or replacements will fall within the scope of protection of the present application.

Claims

1. A connection structure between the inner and outer actuator rings of an outer casing, characterized in that: include: An inner transmission shaft (1) is located inside the outer casing (2), has end teeth at one end, and an inner rocker arm (3) is formed on the outer wall of the other end; the inner rocker arm (3) is hinged to a linkage ring located inside the outer casing (2); An outer transmission shaft (4) has an outer rocker arm (5) formed on the outer wall of one end thereof, and the other end thereof passes through a transmission hole on the outer casing (2) and extends into the inner side of the outer casing (2), and the end has end teeth; the outer rocker arm (5) is hinged to an actuator cylinder located outside the outer casing (2); A connecting bolt (6) has a screw rod which axially penetrates the outer transmission shaft (4) and is screwed onto one end of the inner transmission shaft (1) having end teeth, thereby connecting the inner transmission shaft (1) and the outer transmission shaft (4) so that the ends of the inner transmission shaft (1) and the outer transmission shaft (4) having end teeth mesh with each other.

2. The connection structure between the inner and outer actuator rings of the outer casing according to claim 1, characterized in that: A positioning hole is provided on the stator casing (7) located inside the outer casing (2); One end of the inner transmission shaft (1) extending into the inner side of the outer casing (2) has a positioning protrusion; The positioning protrusion extends into the positioning hole.

3. The connection structure between the inner and outer actuator linkage rings of the outer casing according to claim 2, characterized in that: Also includes: A spherical bushing (8) is sleeved on the positioning protrusion and arranged in the positioning hole.

4. The connection structure between the inner and outer actuator linkage rings of the outer casing according to claim 3, characterized in that: The head of the positioning protrusion extends from the spherical bushing (8); Also includes: A locking nut (9) is screwed onto the head of the positioning protrusion and rests against the inner side of the stator casing (7).

5. The connection structure between the inner and outer actuator linkage rings of the outer casing according to claim 4, characterized in that: The inner rocker arm (3) and the linkage ring are hinged by an inner connecting rod (10); The outer rocker arm (5) and the actuator are hingedly connected by an outer connecting rod (11).

6. A method for assembling a connection structure between inner and outer actuator rings of an outer casing, for assembling the connection structure between inner and outer actuator rings of an outer casing according to claim 5, characterized in that: include: A spherical bushing (8) is provided in a positioning hole of the stator casing (7); Insert the positioning protrusion on the inner transmission shaft (1) through the spherical bushing (8) and into the inner side of the stator casing (7), and tighten the locking nut (9); Hinge the inner rocker arm (3) on the inner drive shaft (1) to the linkage ring; The outer transmission shaft (4) is passed through the transmission hole on the outer casing (2), and the screw of the connecting bolt (6) is passed through the outer transmission shaft (4) along the axial direction and screwed to the end of the inner transmission shaft (1) having the end teeth, so that the ends of the inner transmission shaft (1) and the outer transmission shaft (4) having the end teeth are meshed with each other; Hinge the outer rocker arm (5) on the outer drive shaft (4) to the actuator.

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