Hydraulic torque compensation device

Abstract

The invention discloses a hydraulic torque compensation device, and belongs to the technical field of aviation equipment vibration isolation installation, the hydraulic torque compensation device comprises a left actuating cylinder, a right actuating cylinder and a hydraulic pipe, the left actuating cylinder and the right actuating cylinder respectively comprise an oil cylinder sleeve and an actuating rod, the oil cylinder sleeves and the actuating rods form hydraulic cavities, the hydraulic cavities of the left actuating cylinder and the right actuating cylinder are communicated through the hydraulic pipe, and the hydraulic pipe is connected with the left actuating cylinder and the right actuating cylinder. A rubber layer is arranged between the oil cylinder sleeve and the actuating rod, the rubber layer is fixedly connected with the oil cylinder sleeve and the actuating rod, the actuating rod is provided with a plug pin penetrating through the side face of the actuating rod, the plug pin is provided with a connecting lifting lug, plug pin holes are formed in the side wall of the oil cylinder sleeve and the rubber layer, and the two ends of the plug pin extend out of the plug pin holes. And the bolt can move along with the actuating rod. The invention is suitable for an aircraft turboprop engine, the service life of the aircraft turboprop engine is equivalent to that of the engine, and maintenance is not needed in the whole life cycle.

Description

Technical Field

[0001] The invention belongs to the technical field of vibration isolation installation of aviation equipment, and in particular relates to a hydraulic torque compensation device. Background Art

[0002] There are many models of aircraft using turboprop engines, and their engines are installed in the aircraft through engine mounting brackets and vibration isolation systems. During takeoff, cruising, rapid pull-up, idling and other operating conditions, the aircraft's turboprop engine will transmit huge thrust and torque to the aircraft, and at the same time, it will transmit a large clockwise torsional load to the engine mounting bracket and vibration isolation system. In order to protect the engine mounting bracket and vibration isolation system from excessive deformation and damage due to torsional load, a torque compensation device needs to be installed on the engine mounting bracket to limit the reaction torque generated by the engine.

[0003] Existing hydraulic torque compensation devices, see Figure 1 , including a left actuator 5, a right actuator 6 and a hydraulic pipe 4, wherein both the left and right actuators include a cylinder sleeve 1 and an actuator rod 2, the actuator rod 2 is plugged into the cylinder sleeve 1 to form a hydraulic chamber 3, and hydraulic oil is contained in the hydraulic chamber 3 and the hydraulic pipe 4. The hydraulic torque compensation device is vertically fixed on the engine mounting frame, the actuator rod 2 of the left actuator 5 has its rod head facing downward and is connected to the connecting component on the engine, and the actuator rod 2 of the right actuator 6 has its rod head facing upward and is also connected to the connecting component on the engine. When the aircraft engine is running, a clockwise torque is transmitted to the hydraulic torque compensation device through the connecting component, the left actuator rod is subjected to an upward force, the right actuator rod is subjected to a downward force, the hydraulic chamber 3 is compressed, the pressure on the hydraulic oil in the chamber increases, a reverse force is generated, and torsional stiffness is formed, so that the torque compensation device plays an anti-torsion role.

[0004] The premise for the hydraulic torque compensation device to work is that the seal between the cylinder sleeve 1 and the actuator rod 2 is good. However, due to the large torsional load of the aircraft turboprop engine, the hydraulic torque compensation device needs to bear a large working intensity. The density of the hydraulic oil is very high and it is almost incompressible. A compression of about 2 mm will generate huge pressure, causing the hydraulic oil to leak easily under pressure, so that the seal between the cylinder sleeve 1 and the actuator rod 2 cannot be maintained for a long time. The service life of the hydraulic torque compensation device is short, resulting in the frequent replacement of the hydraulic torque compensation device on the aircraft engine mounting frame, which not only increases the maintenance cost of the aircraft, but also increases the probability of aircraft failure. Summary of the invention

[0005] The purpose of the present invention is to provide a hydraulic torque compensation device for installation on an aircraft turboprop engine, the service life of which is equivalent to that of the engine and can be maintenance-free throughout the entire life cycle.

[0006] The technical solution of the present invention is as follows: A hydraulic torque compensation device comprises a left actuator cylinder, a right actuator cylinder and a hydraulic pipe, wherein the left and right actuator cylinders each comprise a cylinder sleeve and an actuator rod, wherein the cylinder sleeve and the actuator rod form a hydraulic chamber, wherein the hydraulic chambers of the left and right actuator cylinders are connected via the hydraulic pipe, wherein the cylinder sleeve and the actuator rod are provided with a rubber layer, wherein the rubber layer is fixedly connected to the cylinder sleeve and the actuator rod, wherein the actuator rod is provided with a latch penetrating from a side surface thereof, wherein the latch is provided with a connecting lug, wherein a latch hole is formed on the side wall of the cylinder sleeve and the rubber layer, wherein both ends of the latch extend out of the latch hole, and wherein the latch can move in the latch hole along with the actuator rod.

[0007] When the hydraulic torque compensation device of the present invention is used, it is vertically fixed on the engine mounting frame, with the connection ear of the left actuator facing downward and connected to the connecting component on the engine, and the connection ear of the right actuator facing upward and connected to the connecting component on the engine. When the hydraulic torque compensation device is subjected to the clockwise torque transmitted from the engine, the actuator rod of the left actuator is subjected to an upward force, and the actuator rod of the right actuator is subjected to a downward force, the hydraulic chamber is compressed, and the pressure on the hydraulic oil increases, generating a reverse force and forming torsional stiffness; and the actuator rod is displaced, causing the rubber layer to deform and form stiffness, and the two stiffnesses work together to resist torsion. Such a design can reduce the displacement distance of the actuator and the degree of deformation of the rubber layer while ensuring the anti-torsion effect, while reducing the risk of hydraulic oil leakage and excessive deformation of the rubber layer, and the rubber layer can also increase the sealing between the cylinder sleeve and the actuator rod.

[0008] There is a gap between the pin and the rubber layer and the cylinder sleeve. Under normal working conditions, the pin will not interfere with the deformation of the rubber layer. However, when the rubber layer deforms too much, the pin can prevent the rubber layer from continuing to deform through the metal connection, thus preventing the actuator from coming out of the cylinder sleeve and the rubber from being damaged by excessive deformation. In summary, the service life of the hydraulic torque compensation device is greatly increased.

[0009] Furthermore, the connecting ear comprises an ear hole, and both ends of the latch are swaged and inserted into the ear hole. This connection method is simple and reliable, and other connection methods between the latch and the actuating rod can also be adopted.

[0010] Furthermore, the rubber layer is a cylindrical rubber sleeve matching the actuating rod. The integrally formed rubber sleeve has a better connection effect.

[0011] Furthermore, the rubber sleeve is vulcanized rubber. The connection between the actuating rod and the cylinder sleeve through the rubber layer of vulcanized rubber can greatly improve the sealing performance of the cylinder.

[0012] Furthermore, the latch pin and the actuating rod are connected by interference fit, which is simple and reliable, and other connection modes of the latch pin and the actuating rod may also be used.

[0013] Furthermore, the inner surface of the oil cylinder sleeve is covered with vulcanized rubber. This optimized design can further improve the sealing performance of the actuator.

[0014] Furthermore, the hydraulic pipe is a rubber hose with a braided steel mesh inside. The rubber hose with a braided steel mesh inside is a composite pipe. Its internal structure includes an inner rubber layer and an outer rubber layer, and the braided steel mesh is located between the inner rubber layer and the outer rubber layer to play a reinforcing role. By using hydraulic pipes with different strengths, the stiffness of the hydraulic oil in the hydraulic pipe can be adjusted, and nonlinear stiffness can also be obtained.

[0015] Furthermore, the oil cylinder sleeve is provided with an oil cylinder base. Adding the base can facilitate installation.

[0016] Furthermore, the oil cylinder base is provided with a pipeline connecting the hydraulic pipe and the hydraulic chamber, so as to facilitate pipeline design.

[0017] Furthermore, the oil cylinder base is provided with pipelines for liquid injection and exhaust, which is convenient for liquid injection and exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the principle of a hydraulic torque compensation device in the prior art; Figure 2 This is a schematic diagram of the appearance of a hydraulic torque compensation device according to an embodiment of the present invention; Figure 3 It is a three-dimensional cross-sectional schematic diagram of the left actuator of the hydraulic torque compensation device according to an embodiment of the present invention; Figure 4 It is a three-dimensional cross-sectional schematic diagram of the right actuator of the hydraulic torque compensation device according to an embodiment of the present invention; Figure 5 It is a top view schematic diagram of a hydraulic torque compensation device according to an embodiment of the present invention; Figure 6 AA sectional view of the left actuator of the hydraulic torque compensation device according to an embodiment of the present invention; Figure 7 It is a BB cross-sectional view of the right actuator of the hydraulic torque compensation device according to an embodiment of the present invention; Figure 8 It is a schematic three-dimensional installation diagram of a hydraulic torque compensation device according to an embodiment of the present invention; Fig. 9 This is a front view of the installation of the hydraulic torque compensation device according to an embodiment of the present invention.

[0019] in, Figure 1 The markings are as follows: 1. Cylinder sleeve; 2. Actuating rod; 3. Hydraulic chamber; 4. Hydraulic pipe; 5. Left actuator; 6. Right actuator.

[0020] Figure 2-9 The markings are as follows: 1. Cylinder sleeve; 2. Actuating rod; 3. Hydraulic chamber; 4. Hydraulic pipe; 5. Left actuator; 6. Right actuator; 7. Latch; 8. Latch hole; 9. Rubber layer; 10. Connecting ear; 11. Cylinder base; 12. Engine; 13. Engine mounting bracket. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0022] See also Figure 2-7 A hydraulic torque compensation device of the present invention comprises a left actuator 5, a right actuator 6 and a hydraulic pipe 4. The left and right actuators each comprise a cylinder sleeve 1 and an actuator rod 2. The cylinder sleeve 1 and the actuator rod 2 form a hydraulic chamber 3. The hydraulic chambers 3 of the left and right actuators are connected through a hydraulic pipe 4. The hydraulic chambers 3 and the hydraulic pipe 4 are filled with hydraulic oil. The cylinder sleeve 1 and the actuator rod 2 are sealed and connected by a rubber layer 9. The rubber layer 9 is a cylindrical vulcanized rubber sleeve that matches the actuator rod 2. The actuator rod 2 is provided with a latch 7 that penetrates from its side. The latch 7 and the actuator rod 2 are connected by an interference fit. A latch hole 8 is formed on the side wall of the cylinder sleeve 1 and the rubber layer 9. The two ends of the latch 7 extend out of the latch hole 8. The latch 8 is provided with a connecting ear 10. The connecting ear 10 comprises an ear hole. The two ends of the latch 7 are inserted into the ear hole by being swaged. The oil cylinder sleeve 1 is provided with an oil cylinder base 11, and the oil cylinder base 11 is provided with a pipeline connecting the hydraulic pipe 4 and the hydraulic chamber 3. The oil cylinder base 11 is also provided with pipelines for liquid injection and exhaust.

[0023] See also Figure 8 and Fig. 9 When in use, the hydraulic torque compensation device of the present invention is vertically fixed on the engine mounting frame 13, the connecting ear 10 of the left actuator 5 is connected to the connecting component on the engine 12, and the connecting ear 10 of the right actuator 6 is also connected to the connecting component on the engine 12.

[0024] When the aircraft takes off, cruises, rapidly pulls up, or flies at idle speed, the clockwise torque generated by the engine is transmitted to the connecting lug 10 through the connecting parts on the engine. The connecting lug 10 of the left actuator 5 is subjected to an upward force, driving the actuating rod 2 of the left actuator upward. The connecting lug 10 of the right actuator 6 is subjected to a downward force, driving the actuating rod 2 of the right actuator downward. The hydraulic chamber 4 is compressed, and the hydraulic oil in it is subjected to increased pressure, generating a reverse force, forming torsional stiffness; and the actuating rod 2 is displaced, causing the rubber layer 9 to deform and form stiffness, and the two stiffnesses play an anti-torsion role together. And because the rubber layer 9 has a certain stiffness, this stiffness can form a parallel relationship with the rubber vibration isolation device of the engine vibration isolation system, can share part of the vibration load, have a certain protective effect on the rubber vibration isolation device, and increase the service life of the rubber vibration isolation device.

[0025] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A hydraulic torque compensation device, comprising a left actuating cylinder (5), a right actuating cylinder (6) and a hydraulic pipe (4), wherein the left and right actuating cylinders each comprise a cylinder sleeve (1) and an actuating rod (2), wherein the cylinder sleeve (1) and the actuating rod (2) form a hydraulic chamber (3), and the hydraulic chambers (3) of the left and right actuating cylinders are connected via the hydraulic pipe (4), characterized in that: A rubber layer (9) is provided between the cylinder sleeve (1) and the actuating rod (2), the rubber layer (9) being fixedly connected to the cylinder sleeve (1) and the actuating rod (2), the actuating rod (2) being provided with a latch (7) penetrating from a side surface thereof, the latch (7) being provided with a connecting lug (10), a latch hole (8) being provided on the side wall of the cylinder sleeve (1) and the rubber layer (9), the two ends of the latch (7) extending from the latch hole (8), and the latch (7) being able to move with the actuating rod (2).

2. The hydraulic torque compensation device according to claim 1, characterized in that: The connecting lifting ear (10) comprises a lifting ear hole, and both ends of the latch pin (7) are roughened and inserted into the lifting ear hole.

3. The hydraulic torque compensation device according to claim 1, characterized in that: The rubber layer (9) is a cylindrical rubber sleeve that matches the actuating rod (2).

4. The hydraulic torque compensation device according to claim 1, characterized in that: The rubber layer (9) is vulcanized rubber.

5. The hydraulic torque compensation device according to claim 1, characterized in that: The latch pin (7) and the actuating rod (2) are connected via an interference fit.

6. The hydraulic torque compensation device according to claim 1, characterized in that: The inner surface of the cylinder sleeve (1) is covered with vulcanized rubber.

7. The hydraulic torque compensation device according to claim 1, characterized in that: The hydraulic pipe (4) is a rubber hose with a braided steel wire mesh inside the pipe wall.

8. The hydraulic torque compensation device according to claim 1, characterized in that: The oil cylinder sleeve (1) is provided with an oil cylinder base (8).

9. The hydraulic torque compensation device according to claim 9, characterized in that: The oil cylinder base (11) is provided with a pipeline connecting the hydraulic pipe (4) and the hydraulic chamber (3).

10. The hydraulic torque compensation device according to claim 9, characterized in that: The oil cylinder base (11) is provided with pipelines for liquid injection and exhaust.

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