An automatic tilting device for a helicopter

Abstract

The utility model relates to the field of helicopter rotor system, specifically disclose a kind of automatic tilting device of helicopter, including tilting device dynamic ring and contact bearing, further including integrated tilting device fixed ring, the inner ring of integrated tilting device fixed ring is bearing inner ring shape;Contact bearing is located between the inner ring of tilting device dynamic ring and integrated tilting device fixed ring outer ring;The longitudinal section profile of integrated tilting device fixed ring is bearing inner ring shape and is arranged symmetrically along arc line along horizontal axis.The scheme in because arc line is arranged symmetrically along horizontal axis, so that the cooperation place of integrated tilting device fixed ring inner ring and spherical hinge outer wall does not need additional dustproof protection, improves its dustproof characteristic, reduces its maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of helicopter rotor system technology, and in particular to an automatic tilter for helicopters. Background Technology

[0002] As the most crucial component of the control system, the helicopter's automatic swashplate controls the overall change in rotor pitch through coordinated actions, thereby controlling the helicopter's takeoff and landing; or, through coordinated actions, it coordinates and controls the periodic pitch changes of the rotor hub, thereby controlling the helicopter's pitch and roll maneuvers. Therefore, the quality of the helicopter's automatic swashplate directly determines the helicopter's performance, safety, and reliability.

[0003] Traditional helicopter swashplates mainly consist of a swashplate rotating ring, a swashplate stationary ring, a radial spherical bearing, a double-row angular contact bearing, a dust cover, and related connecting and positioning components. Among these, traditional double-row angular contact bearings are generally large, resulting in a large size and weight for traditional swashplates, which affects helicopter performance (load, range) and economy (fuel consumption). At the same time, traditional radial spherical bearings require a lubrication environment, and their dust protection mechanism must be considered in the design, making maintenance inconvenient and reducing reliability. This affects helicopter availability (long maintenance downtime) and maintenance costs, and can also easily affect flight safety. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an automatic tilting device for helicopters, which solves the problems of traditional radial joint bearings requiring a lubrication environment, needing to consider dustproof mechanisms in their design, and being inconvenient to maintain.

[0005] To achieve the above objectives, the basic solution of this utility model is as follows: an automatic swashplate for helicopters, comprising a swashplate rotating ring and a contact bearing, and further comprising: The integrated swashplate has an inner ring shaped like a bearing inner ring. The contact bearing is located between the inner ring of the swashplate's moving ring and the outer ring of the integrated swashplate's stationary ring; the integrated swashplate's stationary ring has an arc-shaped longitudinal cross-sectional profile, and the arc is symmetrically arranged along the horizontal axis.

[0006] The technical principle of this utility model is as follows: the bearing inner ring of the integrated swashplate inner ring can mate with the original ball joint outer wall in the helicopter automatic swashplate; at this time, because the arc is symmetrically arranged along the horizontal axis, the mating point between the inner ring of the integrated swashplate fixed ring and the outer wall of the ball joint does not require additional dust protection, thus improving its dustproof performance and reducing its maintenance costs; at the same time, the design of the integrated swashplate inner ring makes the mating between the integrated swashplate fixed ring and the ball joint more precise and stable, which can reduce the number of mating parts between the integrated swashplate inner ring and the ball joint, reduce the overall weight of the helicopter automatic swashplate, and improve the performance and economy of the helicopter.

[0007] Furthermore, the contact bearing is a four-point contact bearing.

[0008] With the above configuration, the four-point contact bearing can transmit the oscillating load between the swashplate moving ring and the integrated swashplate stationary ring, making the fit between the swashplate moving ring and the integrated swashplate stationary ring more stable. At the same time, after the four-point contact bearing is fitted with the integrated swashplate inner ring and the swashplate moving ring, compared with the double-row angular contact bearing in the traditional helicopter swashplate, the structure at the fit point of the three parts is relatively small and lightweight.

[0009] Furthermore, it also includes a rotating ring cover, which is fixedly installed on the end face of the rotating ring of the swashplate, and a first protrusion extends from the inner ring of the rotating ring cover to abut against the end face of the contact bearing.

[0010] With the above settings, the rotating ring gland can cooperate with the first protrusion to achieve installation limit on the end face of the contact bearing, thereby improving the stability of the installation between the contact bearing and the rotating ring of the swashplate.

[0011] Furthermore, it also includes a fixed ring cover, which is fixedly installed on the end face of the fixed ring of the integrated tilter, and a second protrusion extends from the outer ring of the fixed ring cover to abut against the end face of the contact bearing.

[0012] With the above settings, the fixed ring cover can cooperate with the second protrusion to further limit the installation of the contact bearing end face, improve the stability of the installation between the contact bearing and the integrated swashplate fixed ring, and thus improve the stability of the installation between the contact bearing, the integrated swashplate fixed ring and the swashplate moving ring, as well as the transmission of oscillating loads.

[0013] Furthermore, it also includes a number of first pressure ring bolts, which pass through the moving ring cover and are fixedly connected to the swashplate moving ring.

[0014] With the above settings, the first pressure ring bolt can stably fix the rotating ring cover and the tilter rotating ring, making the fit between the rotating ring cover, the tilter rotating ring and the contact bearing more precise.

[0015] Furthermore, it also includes several second pressure ring bolts, which pass through the fixed ring cover and are fixedly connected to the integrated tilter fixed ring.

[0016] With the above settings, the second pressure ring bolt can stably fix the fixed ring cover and the integrated tilter fixed ring, making the fit between the fixed ring cover, the integrated tilter fixed ring and the contact bearing more precise.

[0017] Furthermore, the central angle of the longitudinal section profile of the inner ring of the integrated tilter is 28-35°.

[0018] With the above settings, the inner ring of the integrated tilter stationary ring has a certain outward convex arc, making it difficult for dust to enter the inner ring and further improving the dustproof characteristics of the inner ring of the integrated tilter stationary ring. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the axial direction of an automatic tilting device for helicopters according to an embodiment of the present invention.

[0020] Figure 2 This is a longitudinal sectional view of an automatic tilting device for helicopters according to an embodiment of the present invention.

[0021] In the above figures: 10 moving ring of the tilter, 20 four-point contact bearing, 30 fixed ring of the integrated tilter, 401 moving ring cover, 402 first protrusion, 501 fixed ring cover, 502 second protrusion, 601 first pressure ring bolt, 602 second pressure ring bolt, and 70 ball joint. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0023] This embodiment is basically as follows: Figure 1 and Figure 2 As shown in the figure, this utility model embodiment proposes an automatic swashplate for helicopters, including a swashplate moving ring 10, a contact bearing, an integrated swashplate fixed ring 30, a moving ring cover 401, a fixed ring cover 501, a plurality of first pressure ring bolts 601 and a plurality of second pressure ring bolts 602. The contact bearing is a four-point contact bearing 20, which is located between the inner ring of the swashplate moving ring 10 and the outer ring of the integrated swashplate fixed ring 30.

[0024] like Figure 2 As shown, the inner ring of the integrated tilter fixed ring 30 is shaped like the inner ring of a bearing. The longitudinal section profile of the integrated tilter fixed ring 30, which is shaped like the inner ring of a bearing, is an arc, and the arc is symmetrically arranged along the horizontal axis. The central angle of the longitudinal section profile of the inner ring of the integrated tilter fixed ring 30 is 30°.

[0025] like Figure 1 and Figure 2As shown, the rotating ring cover 401 is fixedly installed on the end face of the rotating ring 10 of the swashplate, and a first protrusion 402 extends from the inner ring of the rotating ring cover 401 to abut against the end face of the contact bearing. The first protrusion 402 is integrally formed with the rotating ring cover 401. The first ring bolt 601 passes through the rotating ring cover 401 and is fixedly connected to the rotating ring 10 of the swashplate.

[0026] like Figure 1 and Figure 2 As shown, the fixed ring cover 501 is fixedly installed on the end face of the integrated tilter fixed ring 30, and a second protrusion 502 extends from the outer ring of the fixed ring cover 501 to abut against the end face of the contact bearing. The second protrusion 502 is integrally formed with the fixed ring cover 501. The second ring bolt 602 passes through the fixed ring cover 501 and is fixedly connected to the integrated tilter fixed ring 30.

[0027] In addition, the inner ring of the integrated tilter is made of lightweight alloy material and self-lubricating material.

[0028] In this embodiment, when the helicopter automatic swashplate is in use, the inner ring of the bearing in the integrated swashplate inner ring and the outer wall of the ball joint 70 of the helicopter automatic swashplate achieve self-lubricating contact, so that the integrated swashplate inner ring can meet its function and have maintenance-free performance. At the same time, since the central angle of the longitudinal section profile of the inner ring of the integrated swashplate fixed ring 30 is 30° and the arc is symmetrically arranged along the horizontal axis, the contact between the inner ring of the integrated swashplate fixed ring 30 and the outer wall of the ball joint 70 does not require additional dust protection, thus improving its self-lubricating and dustproof characteristics.

[0029] The four-point contact bearing 20 has three-proof capabilities. When the four-point contact bearing 20 is matched with the integrated swashplate inner ring and the swashplate moving ring 10, compared with the double-row angular contact bearing in the traditional helicopter swashplate, the structure at the joint of the three is relatively small and lightweight. The four-point contact bearing 20 can transmit the swing load between the swashplate moving ring 10 and the integrated swashplate stationary ring 30, making the fit between the swashplate moving ring 10 and the integrated swashplate stationary ring 30 more stable.

[0030] Overall, helicopter automatic swashplates can reduce the number of parts used, thereby reducing the overall weight of the helicopter automatic swashplate. At the same time, they reduce lubrication and maintenance pressure, improve reliability during flight, and enhance helicopter performance and economy.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An automatic swashplate for helicopters, comprising a swashplate rotating ring and a contact bearing, characterized in that, Also includes: An integrated tilter stationary ring, wherein the inner ring of the integrated tilter stationary ring is shaped like the inner ring of a bearing; The contact bearing is located between the inner ring of the swashplate moving ring and the outer ring of the integrated swashplate stationary ring; the longitudinal cross-sectional profile of the integrated swashplate stationary ring, which is shaped like the inner ring of the bearing, is arc-shaped and the arc is symmetrically arranged along the horizontal axis.

2. The helicopter automatic tilting device as described in claim 1, characterized in that, The contact bearing is a four-point contact bearing.

3. The helicopter automatic tilting device as described in claim 1, characterized in that, It also includes a rotating ring cover, which is fixedly installed on the end face of the rotating ring of the tilter, and the inner ring of the rotating ring cover extends out a first protrusion that abuts against the end face of the contact bearing.

4. The helicopter automatic tilting device as described in claim 1, characterized in that, It also includes a fixed ring cover, which is fixedly installed on the end face of the fixed ring of the integrated tilter, and the outer ring of the fixed ring cover extends out to abut against the end face of the contact bearing.

5. The helicopter automatic tilting device as described in claim 3, characterized in that, It also includes a number of first pressure ring bolts, which pass through the moving ring cover and are fixedly connected to the swashplate moving ring.

6. A helicopter automatic tilting device as described in claim 4, characterized in that, It also includes several second pressure ring bolts, which pass through the fixed ring cover and are fixedly connected to the integrated tilter fixed ring.

7. The helicopter automatic tilting device as described in claim 1, characterized in that, The central angle of the longitudinal section profile of the inner ring of the integrated tilter is 28-35°.

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