A drive rod support structure for a variable guide vane

Abstract

The application belongs to the field of adjustable guide vane design and relates to a transmission rod supporting structure suitable for adjustable guide vane, which comprises a transmission rod, a casing, a first self-lubricating joint bearing, an outer transmission rocker arm, an inner transmission rocker arm and a second self-lubricating joint bearing; the casing is integrally provided with a first mounting seat and a second mounting seat along the axial direction of the transmission rod, the first self-lubricating joint bearing is arranged in the first mounting seat and connected with the transmission rod, the second self-lubricating joint bearing is arranged in the second mounting seat and connected with the transmission rod, and the outer transmission rocker arm is arranged between the first self-lubricating joint bearing and the second self-lubricating joint bearing; the outer transmission rocker arm is located between the two self-lubricating joint bearings, torque transmission is stable and there is no eccentric load in the adjusting process of the adjustable guide vane; the two self-lubricating joint bearings are realized through cooperation of the first mounting seat, the second mounting seat, a first fastener and a second fastener, coupling of the two self-lubricating joint bearings is not needed, and the overall structure is stable.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of adjustable guide vane design, and particularly relates to a transmission rod support structure suitable for an adjustable guide vane. BACKGROUND

[0002] An aero turbine engine has a plurality of adjustable guide vanes, and the adjusting mechanism of the adjustable guide vanes is complex in structure, and usually needs to undergo multi-stage conversion of rotation and translation through a blade rotating shaft-blade rocker arm-linkage ring-inner transmission rocker arm-transmission rod-outer transmission rocker arm, involving a plurality of complex spatial pairs.

[0003] The transmission rod is fixed to a casing mounting seat through a pair of self-lubricating joint bearings, and the outer transmission rocker arm needs to be arranged on the outside of the casing to be connected to a driving structure such as an actuator cylinder outside the casing; the inner transmission rocker arm needs to be arranged on the inside of the casing to be connected to a motion conversion structure such as a linkage ring. Usually, the outer transmission rocker arm is located at the outermost end of the two self-lubricating joint bearings, and when the actuator cylinder drives the blade to rotate, the outer transmission rocker arm may be subjected to structural eccentric loading due to the support cantilever, which is not conducive to stable transmission of torque, and the bearing limiting stop needs to be completed by coupling of the two self-lubricating joint bearings, which may reduce the stability of the overall structure.

[0004] Therefore, a structure scheme of arranging the outer transmission rocker arm between the two self-lubricating joint bearings should be considered to ensure stable transmission of torque. SUMMARY

[0005] The application aims to provide a transmission rod support structure suitable for an adjustable guide vane to solve the problem that the current outer transmission rocker arm is located at the outermost end of the two self-lubricating joint bearings, which may easily cause structural eccentric loading and reduce the stability of the overall structure.

[0006] The technical scheme of the application is: a transmission rod support structure suitable for an adjustable guide vane, comprising a transmission rod, a casing, a first self-lubricating joint bearing, an outer transmission rocker arm, an inner transmission rocker arm and a second self-lubricating joint bearing; the casing is integrally provided with a first mounting seat and a second mounting seat along the axial direction of the transmission rod, the first self-lubricating joint bearing is arranged in the first mounting seat and connected to the transmission rod, the second self-lubricating joint bearing is arranged in the second mounting seat and connected to the transmission rod, the outer transmission rocker arm is fixedly connected to the transmission rod and arranged between the first self-lubricating joint bearing and the second self-lubricating joint bearing, the inner transmission rocker arm is fixedly connected to the transmission rod and arranged below the second self-lubricating joint bearing, and the transmission rod is provided with a first fastener at a position corresponding to the first self-lubricating joint bearing on the upper end and provided with a second fastener at a position corresponding to the inner transmission rocker arm on the lower end.

[0007] Preferably, the first fastener comprises a first nut and a first washer, the first washer abutting against the inner ring of the first self-lubricating joint bearing, the first nut being arranged outside the first washer and being threadedly engaged with the transmission rod, the inner ring of the first self-lubricating joint bearing being fixed by tightening the first nut; the second fastener comprises a second nut and a second washer, the second washer abutting against the side wall of the inner transmission rocker arm, the second nut being arranged outside the second washer and being threadedly engaged with the transmission rod.

[0008] Preferably, the first mounting base is provided with a sleeve nut at a position corresponding to the first self-lubricating joint bearing, the sleeve nut has an inverted L-shaped cross section, a thread is formed on the outer wall of the first mounting base, the inner wall of the sleeve nut is threadedly engaged with the first mounting base, and the folded portion at the top of the sleeve nut abuts against the outer ring of the first self-lubricating joint bearing; the first mounting base is provided with a first limiting protrusion at a position corresponding to the outer ring of the first self-lubricating joint bearing.

[0009] Preferably, the transmission rod is provided with a first stop ring below the outer transmission rocker arm, and the second mounting base is provided with a second stop ring at a position corresponding to the outer ring of the second self-lubricating joint bearing; the second mounting base is further provided with a second limiting protrusion at a position corresponding to the outer ring of the second self-lubricating joint bearing.

[0010] Preferably, the first stop ring and the second stop ring are hole stop rings, which are closed annular rings after assembly.

[0011] Preferably, the outer transmission rocker arm is located at the middle position between the first self-lubricating joint bearing and the second self-lubricating joint bearing.

[0012] Preferably, the opening angle of the first mounting base corresponding to the outer transmission rocker arm and the opening angle of the second mounting base corresponding to the inner transmission rocker arm are both 180°; a plurality of reinforcing ribs are arranged on the outer walls of the first mounting base and the second mounting base.

[0013] Preferably, the transmission rod and the outer transmission rocker arm are engaged in a small gap of a profile hole, and the fitting tolerance is H7 / f7; the profile holes of the outer transmission rocker arm and the inner transmission rocker arm are both waist-shaped holes.

[0014] The transmission rod supporting structure suitable for the adjustable guide vane of the present application, the outer transmission rocker arm is located at the middle position between the two self-lubricating joint bearings, ensuring stable torque transmission and no partial load during the adjustment of the adjustable guide vane; the two self-lubricating joint bearings are realized by cooperation of the first mounting base, the second mounting base, the first fastener and the second fastener, without the coupling of the two self-lubricating joint bearings, thereby ensuring the stability of the overall structure. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings. Obviously, the drawings described below are only some embodiments of the present application.

[0016] Figure 1 is a sectional view of the overall structure of the present application.

[0017] Figure 2 is an axonometric view of the first mounting seat structure of the present application.

[0018] Figure 3 is a structure view of the outer transmission rocker arm and the inner transmission rocker arm type hole of the present application.

[0019] 1, transmission rod; 2, casing; 3, first self-lubricating joint bearing; 4, outer transmission rocker arm; 5, inner transmission rocker arm; 6, second self-lubricating joint bearing; 7, first retainer ring; 8, second retainer ring; 9, first nut; 10, first washer; 11, second nut; 12, second washer; 13, sleeve nut; 14, first mounting seat; 15, second mounting seat; 16, first limiting protrusion; 17, second limiting protrusion; 18, reinforcing rib. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0021] A transmission rod supporting structure suitable for an adjustable guide vane, such as Figure 1 , comprises a transmission rod 1, a casing 2, a first self-lubricating joint bearing 3, an outer transmission rocker arm 4, an inner transmission rocker arm 5, and a second self-lubricating joint bearing 6.

[0022] The casing 2 is integrally provided with a first mounting seat 14 and a second mounting seat 15 along the axial direction of the transmission rod 1, the first self-lubricating joint bearing 3 is arranged in the first mounting seat 14 and connected with the transmission rod 1, the second self-lubricating joint bearing 6 is arranged in the second mounting seat 15 and connected with the transmission rod 1, the outer transmission rocker arm 4 is fixedly connected with the transmission rod 1 and arranged between the first self-lubricating joint bearing 3 and the second self-lubricating joint bearing 6, and the inner transmission rocker arm 5 is fixedly connected with the transmission rod 1 and arranged below the second self-lubricating joint bearing 6. A first fastener is arranged at the position corresponding to the first self-lubricating joint bearing 3 on the upper end of the transmission rod 1, and a second fastener is arranged at the position corresponding to the inner transmission rocker arm 5 on the lower end of the transmission rod 1.

[0023] In the engine adjusting process, the transmission rod 1 rotates synchronously with the outer transmission rocker arm 4, and then drives the inner transmission rocker arm 5, to complete the torque transmission required by the adjustable guide vane.

[0024] Through the above design, the outer transmission rocker arm 4 is located between the two self-lubricating joint bearings, ensuring stable torque transmission and no load deviation during the adjusting process of the adjustable guide vane; the two self-lubricating joint bearings are realized through the cooperation of the first mounting seat 14, the second mounting seat 15, the first fastener and the second fastener, without the coupling of the two self-lubricating joint bearings, thereby ensuring the stability of the overall structure.

[0025] By setting the first mounting seat 14 and the second mounting seat 15, the coaxial centering is facilitated, the coaxial assembly of the overall structure is ensured, and the stable torque transmission and no load deviation during the adjusting process of the adjustable guide vane are facilitated.

[0026] Preferably, the first fastener includes a first nut 9 and a first washer 10, the first washer 10 abuts against the inner ring of the first self-lubricating joint bearing 3, the first nut 9 is arranged outside the first washer 10 and is threadedly connected with the transmission rod 1, and the inner ring of the first self-lubricating joint bearing 3 is fixed by tightening the first nut 9; the second fastener includes a second nut 11 and a second washer 12, the second washer 12 abuts against the side wall of the inner transmission rocker arm 5, and the second nut 11 is arranged outside the second washer 12 and is threadedly connected with the transmission rod 1.

[0027] The inner ring of the first self-lubricating joint bearing 3 is axially limited by the transmission rod 1 and the tightened first nut 9, the inner transmission rocker arm 5 is axially limited by the transmission rod 1 and the tightened second nut 11, and the inner ring of the second self-lubricating joint bearing 6 is not limited, thereby ensuring that the overall structure is not over-constrained.

[0028] Preferably, the transmission rod 1 is provided with a first stop ring 7 corresponding to the lower part of the outer transmission rocker arm 4, and the second mounting seat 15 is provided with a second stop ring 8 corresponding to the position of the outer ring of the second self-lubricating joint bearing 6. The outer transmission rocker arm 4 is axially limited by the cooperation of the first stop ring 7 and the transmission rod 1, and the outer ring of the second self-lubricating joint bearing 6 is axially limited by the cooperation of the second mounting seat 15 and the second stop ring 8. The second mounting seat 15 is further provided with a second limiting protrusion 17 corresponding to the position of the outer ring of the second self-lubricating joint bearing 6, and the outer ring of the second self-lubricating joint bearing 6 is fixed by cooperating with the second stop ring 8.

[0029] Preferably, the first mounting seat 14 is provided with a sleeve nut 13 at a position corresponding to the first self-lubricating joint bearing 3, the sleeve nut 13 has an inverted L-shaped cross section, the outer wall of the first mounting seat 14 is provided with a thread, the inner wall of the sleeve nut 13 is threadedly connected with the first mounting seat 14, the folded portion at the top of the sleeve nut 13 abuts against the outer ring of the first self-lubricating joint bearing 3, and the outer ring of the first self-lubricating joint bearing 3 is axially limited by tightening the sleeve nut 13. The first mounting seat 14 is provided with a first limiting protrusion 16 at a position corresponding to the outer ring of the first self-lubricating joint bearing 3, and the outer ring of the first self-lubricating joint bearing 3 is fixed by cooperating with the sleeve nut 13.

[0030] Before the transmission rod 1 is assembled, the second self-lubricating joint bearing 6 needs to be fixed in the second mounting seat 15, and the second mounting seat 15 is used to axially limit the second self-lubricating joint bearing 6 with the aid of the second retainer 8. The first self-lubricating joint bearing 3 is installed on the transmission rod 1 in advance, and will be inserted and assembled together with the transmission rod 1; when the transmission rod 1 is assembled, the assembly path is from the outside of the casing 2 to the inside of the casing 2, and then the outer transmission rocker arm 4 and the first retainer 7 are placed in the effective assembly position in advance, so that the transmission rod 1 can be effectively centered.

[0031] When the transmission rod 1 with the first self-lubricating joint bearing 3 is inserted and reaches the position of the first limiting protrusion 16, the sleeve nut 13 is tightened to complete the preliminary fixation of the transmission rod 1. Then, the first washer 10 and the first nut 9 are installed in sequence to ensure that the first self-lubricating joint bearing 3 does not move axially along the transmission rod 1. Then, the inner transmission rocker arm 5, the second washer 12 and the second nut 11 are assembled in sequence to complete the installation and fixation of the inner transmission rocker arm 5.

[0032] Preferably, the outer transmission rocker arm 4 is located at the middle position between the first self-lubricating joint bearing 3 and the second self-lubricating joint bearing 6, which ensures stable torque transmission and no load bias during adjustable vane adjustment.

[0033] The rotation angle range of the outer transmission rocker arm 4 is determined after conversion according to the adjustment angle of the adjustable vane, and the hole size of the casing 2 needs to be determined according to the rotation angle of the outer transmission rocker arm 4. In this application, preferably, the hole angle of the first mounting seat 14 corresponding to the outer transmission rocker arm 4 and the second mounting seat 15 corresponding to the inner transmission rocker arm 5 are both 180°, as shown in Figure 2 The hole size of the first mounting seat 14 and the second mounting seat 15 not only needs to meet the rotation requirements of the two transmission rocker arms, but also needs to meet the assembly requirements of the outer transmission rocker arm 4. In order to enhance the rigidity of the mounting seat and the coaxiality of the positioning surface of the two bearing inner rings, a sufficient number of reinforcing ribs 18 are arranged on the outer walls of the first mounting seat 14 and the second mounting seat 15.

[0034] Preferably, the first and second blocking rings 7 and 8 are hole blocking rings, which are closed circular rings after assembly, and can play a sealing role to a certain extent to prevent gas leakage in the machine box 2.

[0035] Preferably, the transmission rod 1 and the outer transmission rocker arm 4 are in a small gap fit of a profile hole, and the general fit tolerance is H7 / f7; the profile holes of the outer transmission rocker arm 4 and the inner transmission rocker arm 5 are all waist-shaped holes, such as Figure 3 .

[0036] Finally, it should be noted that: the drawings of the disclosed embodiments only involve the structures involved in the disclosed embodiments, other structures can refer to the usual design, and in the case of no conflict, the same embodiment and different embodiments of the present application can be combined with each other;

[0037] Finally: the above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A drive bar support structure for a variable guide vane, characterized by: The utility model provides a transmission rod (1), a machine case (2), first self -lubricating joint bearing (3), outer transmission rocker arm (4), inner transmission rocker arm (5) and second self -lubricating joint bearing (6) are included, the machine case (2) is integrally provided with first mounting seat (14) and second mounting seat (15) along the axial direction of transmission rod (1), first self -lubricating joint bearing (3) is located in first mounting seat (14) and is connected with transmission rod (1), second self -lubricating joint bearing (6) is located in second mounting seat (15) and is connected with transmission rod (1), outer transmission rocker arm (4) is fixedly connected with transmission rod (1) and outer transmission rocker arm (4) is located between first self -lubricating joint bearing (3) and second self -lubricating joint bearing (6), guarantees the stable torque transmission in the process of adjustable guide vane adjustment and no partial load, inner transmission rocker arm (5) is fixedly connected with transmission rod (1) and inner transmission rocker arm (5) is located below second self -lubricating joint bearing (6), the upper end of transmission rod (1) is equipped with first fastener in the position corresponding first self -lubricating joint bearing (3), the lower end of transmission rod (1) is equipped with second fastener in the position corresponding inner transmission rocker arm (5), the rotation angle range of outer transmission rocker arm (4) is determined according to the adjustment angle conversion of adjustable blade, and the aperture size of machine case (2) needs to be determined according to the rotation angle of outer transmission rocker arm (4).

2. The drive bar support structure suitable for an adjustable vane according to claim 1, characterized by: The first fastener includes a first nut (9) and a first washer (10), the first washer (10) is in contact with the inner ring of the first self-lubricating joint bearing (3), the first nut (9) is located outside the first washer (10) and is screwed with the transmission rod (1), and the inner ring of the first self-lubricating joint bearing (3) is fixed by tightening the first nut (9); the second fastener includes a second nut (11) and a second washer (12), the second washer (12) is in contact with the side wall of the inner transmission rocker arm (5), and the second nut (11) is located outside the second washer (12) and is screwed with the transmission rod (1).

3. The drive rod support structure suitable for an adjustable vane according to claim 1, characterized by: The first mounting seat (14) is provided with a sleeve nut (13) corresponding to the position of the first self-lubricating joint bearing (3), the cross section of the sleeve nut (13) is inverted L type, the outer wall of the first mounting seat (14) is provided with a thread, the inner wall of the sleeve nut (13) is screwed with the first mounting seat (14), and the folded part at the top of the sleeve nut (13) is in contact with the outer ring of the first self-lubricating joint bearing (3); the first mounting seat (14) is provided with a first limiting protrusion (16) corresponding to the position of the outer ring of the first self-lubricating joint bearing (3).

4. The drive bar support structure suitable for an adjustable vane according to claim 1, characterized by: The transmission rod (1) is provided with a first stop ring (7) corresponding to the lower part of the outer transmission rocker arm (4), and the second mounting seat (15) is provided with a second stop ring (8) corresponding to the position of the outer ring of the second self-lubricating joint bearing (6); the second mounting seat (15) is also provided with a second limiting protrusion (17) corresponding to the position of the outer ring of the second self-lubricating joint bearing (6).

5. A drive rod support structure suitable for use with an adjustable vane as defined in claim 4, wherein: The first blocking ring (7) and the second blocking ring (8) are hole blocking rings, which are closed circular rings after assembly is completed.

6. The drive bar support structure suitable for an adjustable vane according to claim 1, characterized by: The outer transmission rocker arm (4) is located at the middle position of the first self-lubricating joint bearing (3) and the second self-lubricating joint bearing (6).

7. The drive rod support structure suitable for an adjustable vane according to claim 1, characterized by: The opening angle of the first mounting seat (14) corresponding to the outer transmission rocker arm (4) and the second mounting seat (15) corresponding to the inner transmission rocker arm (5) is 180°; a plurality of reinforcing ribs (18) are arranged on the outer walls of the first mounting seat (14) and the second mounting seat (15).

8. The drive bar support structure suitable for an adjustable vane according to claim 1, characterized by: The transmission rod (1) is matched with the outer transmission rocker arm (4) in a small gap of a shaped hole, and the matching tolerance is H7 / f7; the outer shapes of the shaped holes of the outer transmission rocker arm (4) and the inner transmission rocker arm (5) are both waist-shaped holes.

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