Aircraft radar clutch device suitable for being vertically installed

Abstract

The invention discloses an aircraft radar clutch device suitable for vertical installation, and relates to the technical field of aircraft radars. The device comprises a cylindrical shell, an input shaft and an output shaft. The cylindrical shell is located in a cavity between a piston assembly and an upper end cover and is filled with hydraulic oil. When the input shaft rotates, the piston assembly is pushed to move downwards by adjusting the pressure of hydraulic oil, so that the movable disc is attached to the static disc, and the output shaft is driven to rotate. The device provided by the invention is arranged between an airborne radar and a power system, adopts a hydraulic system commonly used by an airplane as a driving mode, is provided with a hydraulic piston assembly, and can realize the cutting off and transmission of power by controlling the output of pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft radar, and particularly relates to a clutch device for an aircraft radar suitable for vertical installation. Background Art

[0002] With the continuous progress of aviation technology, the functions of aircraft radars are becoming increasingly powerful and diverse, and the requirements for their supporting devices are getting higher and higher. In order to achieve more accurate detection and a wider scanning range, the installation methods and transmission mechanisms of radars need to be continuously innovated. The radar of traditional early warning aircraft is installed on the top of the aircraft and adopts a single margin design. With the diversification and complexity of the battlefield situation, the radar of early warning aircraft is facing more severe tests. The radar of new early warning aircraft urgently needs a double margin design to improve the reliability of the early warning aircraft to complete combat missions. Therefore, a vertically installed clutch device can provide more flexible angle adjustment and better stability for the radar. By setting the clutch between the radar and the power system, the switching use of the main and backup radars can be realized, meeting the working requirements of the current aircraft radar in complex environments. Summary of the Invention

[0003] In view of the deficiencies in the above-mentioned background art, the present invention provides a clutch device for an aircraft radar suitable for vertical installation. The device is installed between the airborne radar and the power system, uses the common hydraulic system of the aircraft as the driving method, and is designed with a hydraulic piston assembly. The power can be cut off and transmitted by controlling the output of pressure.

[0004] The object of the present invention is to provide a clutch device for an aircraft radar suitable for vertical installation, including: A cylindrical housing with an upper end cover at the top and a lower end cover at the bottom; An input shaft, one end of which penetrates through the upper end cover and extends into the cylindrical housing, and a disc is connected to this end; the diameter of the disc is larger than that of the input shaft, and the disc and the input shaft are coaxial; A piston assembly is arranged between the input shaft and the inner wall of the cylindrical housing; A circular moving disc is arranged on the lower end face of the piston assembly, wherein the inner diameter of the circular moving disc is larger than the diameter of the disc; An elastic member is arranged between the piston assembly and the disc; An output shaft, one end of which penetrates through the lower end cover and extends into the cylindrical housing, and a static disc is horizontally arranged at this end; the static disc corresponds to the moving disc; The cavity of the cylindrical housing between the piston assembly and the upper end cover is filled with hydraulic oil; When the input shaft rotates, the piston assembly is pushed to move downward by adjusting the pressure of the hydraulic oil, so that the moving disc is attached to the static disc, thereby driving the output shaft to rotate.

[0005] Preferably, when the pressure of the hydraulic oil is adjusted to decrease, under the action of the elastic member, the piston assembly is pushed upward to move, so that the moving disc separates from the static disc.

[0006] Preferably, it further includes: A first sleeve, which is arranged at the bottom of the upper end cover and is located inside the cylindrical housing; One end of the input shaft sequentially penetrates through the upper end cover and the first sleeve and extends into the cylindrical housing to form a transmission end; the input shaft is rotatably connected to the first sleeve.

[0007] Preferably, the input shaft is rotatably connected to the first sleeve through a bearing.

[0008] Preferably, the piston assembly includes: A first piston ring, which is arranged between the first sleeve and the inner wall of the cylindrical housing; A second piston ring, which is sleeved on the part of the input shaft between the lower end of the first sleeve and the moving disc; springs are symmetrically arranged between the inner edge of the bottom of the second piston ring and the disc body; The annular moving disc is arranged at the outer edge of the bottom of the second piston ring; The first piston ring is rotatably connected to the second piston ring.

[0009] Preferably, the cavity of the cylindrical housing between the first piston ring and the upper end cover is filled with hydraulic oil; When the input shaft rotates, it drives the second piston ring and the moving disc at the bottom of the second piston ring to rotate. By adjusting the pressure of the hydraulic oil, the first piston ring and the second piston ring are pushed downward to make the moving disc fit with the static disc, so that the rotating moving disc drives the static disc to rotate, and further makes the output shaft rotate.

[0010] Preferably, the first piston ring is provided with a stepped piston ring in cross section, so that the inner side of the lower part of the first piston ring corresponds to the upper part of the second piston ring; A bearing is arranged between the lower part of the first piston ring and the upper part of the second piston ring.

[0011] Preferably, it further includes: A second sleeve, which is arranged on the lower end cover and is located inside the cylindrical housing; One end of the output shaft sequentially penetrates through the lower end cover and the second sleeve and extends into the cylindrical housing to form a free end; the output shaft is rotatably connected to the second sleeve; A static disc, which is horizontally arranged on the free end.

[0012] Preferably, oil inlets and air release nozzles are symmetrically arranged on the side wall of the cavity between the cylindrical housing and the upper end cover; hydraulic oil is output into the cavity through the oil inlets for pressurization; the cavity is depressurized by opening the air release nozzles.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a clutch device for an aircraft radar suitable for vertical installation. When the input shaft rotates, the piston assembly is pushed downward by adjusting the pressure of the hydraulic oil, so that the moving disk is in contact with the static disk, thereby driving the output shaft to rotate. Similarly, when the pressure of the hydraulic oil is reduced, the piston assembly is pushed upward under the action of the elastic member, so that the moving disk is separated from the static disk.

[0014] The clutch device provided by the present invention is installed between the airborne radar and the power system, uses the common hydraulic system of the aircraft as the driving method, and is designed with a hydraulic piston assembly. The power can be cut off and transmitted by controlling the output of the pressure. The friction disk of the clutch device adopts a carbon / ceramic composite material and a single pair of friction disk structure design, breaking through the limitation that the traditional clutch device cannot be vertically installed, and having the advantages of fast engagement speed, large transmitted torque, long service life, small volume and high integration.

[0015] The working environment temperature range of the device provided by the present invention is -55°C to 71°C, which can meet the requirements of various use environments of military aircraft and civil aircraft. This clutch is not affected by the pressure pulsation, return oil pressure and fluctuation of the hydraulic energy system, and has good adaptability and versatility; under the two-way driving end torque of 140 N·m, the weight is only 12 Kg. Using the present invention is beneficial to reducing the structural weight of the aircraft.

[0016] The engagement speed difference of the present invention is 0 to 100 r / min. When in the working state, the moving disk and the static disk rotate together, and the static disk drives the output shaft to rotate to achieve power transmission; when in the non-working state, the moving disk and the static disk are loosened, and the braking torque is released to achieve power cut-off. The separation / engagement time of the present invention is not more than 3 seconds, and the power transmission and cut-off can be quickly realized. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a clutch device for an aircraft radar suitable for vertical installation.

[0018] Figure 2 is a schematic structural diagram of the cylindrical housing.

[0019] Figure 3 is Figure 2 bottom view of

[0020] Figure 4 is a schematic diagram of the piston assembly Figure 5 is Figure 4 the top view of

[0021] Figure 6 is Figure 4 the bottom view of

[0022] Figure 7 is the schematic diagram of the lower end cover structure.

[0023] Figure 8 is the top view of the lower end cover.

[0024] Figure 9 is the schematic diagram of the moving disk structure.

[0025] Figure 10 is the schematic diagram of the stationary disk structure.

[0026] Figure 11 is the schematic diagram of the input shaft structure.

[0027] Figure 12 is Figure 11 the top view of

[0028] Figure 13 is the schematic diagram of the connecting block structure.

[0029] Figure 14 is the schematic diagram of the output shaft structure. Detailed implementation manners

[0030] In order to enable those skilled in the art to better understand and implement the technical solution of the present invention, the present invention will be further described below in conjunction with specific embodiments and the accompanying drawings. However, the specific embodiments cited do not limit the present invention.

[0031] The object of the present invention is to provide a clutch device for an aircraft radar suitable for vertical installation. The device is installed between the airborne radar and the power system, uses the commonly used hydraulic system of the aircraft as the driving method, and is designed with a hydraulic piston assembly. By controlling the output of pressure, the cut-off and transmission of power can be achieved. The friction disk of the clutch device adopts a carbon / ceramic composite material and a single pair of friction disk type structure design, breaking through the limitation that the traditional clutch device cannot be vertically installed, and having the advantages of fast engagement speed, large transmitted torque, long service life, small volume and high integration.

[0032] To achieve the above object, as shown in Figures 1 to 14 a clutch device for an aircraft radar suitable for vertical installation includes a cylindrical housing 1, an input shaft 7, an output shaft 11, and a piston assembly 2, a moving disk 4, and a stationary disk 5; the top of the cylindrical housing 1 is provided with an upper end cover, and the bottom is provided with a lower end cover 3; one end of the input shaft 7 passes through the upper end cover and extends into the cylindrical housing 1, and a disk body is connected to the end; the diameter of the disk body is larger than the diameter of the input shaft, and the disk body and the input shaft are coaxial. A piston assembly 2 is provided between the input shaft 7 and the inner wall of the cylindrical housing 1; The lower end face of the piston assembly 2 is provided with an annular moving disk 4, wherein the inner diameter of the annular moving disk 4 is larger than the diameter of the disk body; An elastic member is provided between the piston assembly 2 and the disk body; One end of the output shaft 11 penetrates through the lower end cover 3 and extends into the cylindrical housing 1, and a static disk 5 is horizontally arranged at its end; The static disk 5 corresponds to the moving disk 4; The cavity of the cylindrical housing 1 between the piston assembly and the upper end cover is filled with hydraulic oil; Therefore, when the input shaft 7 rotates, it drives the piston assembly 2 to rotate, and by adjusting the pressure of the hydraulic oil, the piston assembly is pushed downward, so that the moving disk 4 is in contact with the static disk 5, thereby driving the output shaft 11 to rotate. Similarly, when the pressure of the hydraulic oil is reduced by adjustment, under the action of the elastic member, the piston assembly is pushed upward, so that the moving disk 4 is separated from the static disk 5.

[0033] In order to realize the transmission of the input shaft, the device further includes a first sleeve, which is arranged at the bottom of the upper end cover and is located in the cylindrical housing 1; One end of the input shaft 7 sequentially penetrates through the upper end cover and the first sleeve and extends into the cylindrical housing 1 to form a transmission end; The input shaft 7 is rotatably connected to the first sleeve through a bearing.

[0034] Therefore, the first sleeve, the upper end cover and the bearing arranged in the first sleeve are coaxially arranged, and the first sleeve is arranged at the bottom of the upper end cover and forms an integral structure with the upper end cover, which can make the input shaft rotate more stably.

[0035] The fitting or separation of the moving disk and the static disk is realized through the piston assembly. The piston assembly 2 includes a first piston ring 2-1 and a second piston ring 2-2: The first piston ring 2-1 is arranged between the first sleeve and the inner wall of the cylindrical housing 1; The second piston ring 2-2 is sleeved on the part of the input shaft 7 between the lower end of the first sleeve and the moving disk 4; Springs 9 are symmetrically arranged between the inner edge of the bottom of the second piston ring 2-2 and the disk body; The annular moving disk 4 is arranged at the outer edge of the bottom of the second piston ring 2-2; The first piston ring 2-1 is rotatably connected to the second piston ring 2-2. It should be noted that the inner wall of the first piston ring 2-1 is sleeved on the first sleeve, and at the same time, the outer wall is attached to the inner wall of the cylindrical housing 1. The second piston ring 2-2 is provided with spring holes for installing springs.

[0036] By setting the cross-section of the first piston ring 2-1 as a stepped piston ring, the inner side of the lower part of the first piston ring 2-1 corresponds to the upper part of the second piston ring 2-2; A bearing is arranged between the lower part of the first piston ring 2-1 and the upper part of the second piston ring 2-2, and this bearing can withstand the pressure impact transmitted by the hydraulic oil to the piston.

[0037] To this end, while the input shaft 7 rotates, it drives the second piston ring 2-2 and the moving disk 4 at the bottom of the second piston ring 2-2 to rotate. By adjusting the pressure of the hydraulic oil, the first piston ring 2-1 and the second piston ring 2-2 are pushed downward, that is, the first piston ring pushes the second piston ring to move, driving the moving disk 4 to move downward, so that the moving disk 4 fits with the static disk 5. Thus, the rotating moving disk 4 drives the static disk 5 to rotate, and further makes the output shaft 11 rotate, realizing the transmission between the moving disk and the static disk.

[0038] It should be noted that the second piston ring 2-2 is sleeved on the input shaft 7. A moving guide groove is provided on the inner wall of the second piston ring, and a block embedded in the guide groove is provided on the outer wall of the input shaft 7. This block restricts the up and down movement of the second piston ring along the length range of the guide groove.

[0039] A hole body for passing through the output shaft is provided on the lower end cover 3; the output shaft extends to the end inside the housing and is provided with a flange at the end. The static disk 5 is connected to the flange by rivets.

[0040] The moving disk 4 is connected to the second piston ring 2-2 through a connecting block 10, rotates together with the second piston ring 2-2, and can move along the main axis direction with the second piston ring 2-2 to generate a braking torque. Among them, the connecting block 10 connects the moving disk 4 and the second piston ring 2-2 by rivets. Driven by the motor, it is ensured that the moving disk 4 and the second piston ring 2-2 rotate together with the input shaft 7.

[0041] The static disk 5 is connected to the protruding key groove of the output shaft 11 through a key groove. When the product works, it contacts the moving disk 4, generates a braking torque, and drives the output shaft 11 to rotate together.

[0042] Exemplarily, the input shaft 7 has a stepped shaft structure and functions to transmit torque. The upper end of the input shaft 7 is matched with the radar motor installation shaft. There are radially protruding key grooves on the outer circumferential surface of the input shaft 7 for connecting with the second piston ring 2-2. Driven by the motor, the input shaft 7 drives the second piston ring 2-2 and the moving disk 4 to rotate together.

[0043] The upper end of the spring 9 contacts the spring hole of the second piston ring 2-2, and the lower end is fixed in the spring limit hole of the input shaft 7. When the product works, the spring 9 bears the torque transmitted by the second piston ring 2-2 and is compressed; after the product work is completed, the elastic force of the spring 9 disconnects the moving disk 4 and the static disk 5. A snap ring 13 is provided at the upper end of the input shaft to limit the axial movement of the input shaft.

[0044] To achieve the transmission of the output shaft, the device further includes a second sleeve, which is arranged on the lower end cover 3 and located inside the cylindrical housing 1; one end of the output shaft 11 sequentially penetrates the lower end cover 3 and the second sleeve and extends into the cylindrical housing 1 to form a free end; the output shaft 11 is rotatably connected to the second sleeve; a static disc 5, which is horizontally arranged on the free end. The output shaft 11 is rotatably connected to the second sleeve through a bearing 12; Coaxially arranging the second sleeve, the lower end cover and the bearing 12 arranged inside the second sleeve, and arranging the second sleeve on the top of the lower end cover and forming an integral structure with the lower end cover can make the output shaft rotate more stably. Among them, a snap ring 13 is also arranged on one side of the bearing 12 arranged inside the second sleeve.

[0045] The bearing 12 is a deep groove ball bearing. As a load-bearing part of the product, it bears the impact of the radial and combined loads of the product. The snap ring 13 is used in cooperation with the bearing 12 to play a limiting role. The bearing 13 is a tapered roller bearing, which bears axial loads and is used in cooperation with the snap ring 13 to play a limiting role.

[0046] The output shaft 11 is of a stepped shaft structure. The lower end of the output shaft 11 is matched with the installation interface of the radar reducer. 16 keys are evenly distributed circumferentially on the upper end surface of the output shaft 11 and are matched with the key grooves of the static disc 5. 6 bolt holes distributed circumferentially on the output shaft 11 are used to limit the axial movement of the static disc 5. During operation, the output shaft 11 rotates together with the static disc 5.

[0047] In order to realize the movement of the piston assembly, hydraulic oil is filled in the cavity of the cylindrical housing 1 between the first piston ring 2-1 and the upper end cover; When the input shaft 7 rotates, it drives the second piston ring 2-2 and the moving disc 4 at the bottom of the second piston ring 2-2 to rotate. By adjusting the pressure of the hydraulic oil, the first piston ring 2-1 and the second piston ring 2-2 are pushed downward, so that the moving disc 4 is attached to the static disc 5, thereby driving the static disc 5 to rotate through the rotating moving disc 4, and further making the output shaft 11 rotate.

[0048] Oil inlet nozzles 6 and air release nozzles 8 are symmetrically arranged on the side wall of the cavity of the cylindrical housing 1 between the piston assembly 2 and the upper end cover; hydraulic oil is output into the cavity through the oil inlet nozzles 6 and pressurized; the cavity is depressurized by opening the air release nozzles 8.

[0049] Among them, a sealing ring is arranged between the oil inlet nozzle 6 and the side wall of the housing 1. A piston assembly and a limiting structure are arranged in the cavity to provide braking torque.

[0050] The oil inlet nozzle 6 is connected to the housing 1 through threads; a throttle hole is arranged in the oil circuit to control the oil intake.

[0051] The air release nozzle 8 is connected to the housing 1 by threads; it forms a seal with the housing 1 in the closed state and discharges the gas in the housing 1 in the open state to ensure the normal operation of the product.

[0052] In the present invention, the first piston ring 2-1 and the second piston ring 2-2 included in the piston assembly, the first piston ring 2-1 provides a braking torque under the action of hydraulic pressure, and when the product is working, the second piston ring 2-2 makes the moving disk 4 and the static disk 5 fit tightly through the braking torque transmitted by the first piston ring 2-1; after the product finishes working, the second piston ring 2-2 overcomes the spring force to disconnect the moving disk 4 and the static disk 5.

[0053] In summary, the existing clutches cannot meet the urgent need for a dual-margin design for the new early warning aircraft radar. The clutch device for aircraft radar suitable for vertical installation proposed by the present invention, by adopting a carbon / ceramic composite material and a single pair of friction disk type structure design, uses the commonly used hydraulic system of the aircraft as the driving method, and controls the output of pressure by a hydraulic piston assembly, can realize the cut-off and transmission of power, and can meet the urgent need for a dual-margin design of the new early warning aircraft radar. The clutch device for aircraft radar suitable for vertical installation proposed by the present invention breaks through the limitation that the traditional clutch device cannot be vertically installed, and has the advantages of fast engagement speed, large transmitted torque, long service life, small volume and high integration.

[0054] The present invention describes the preferred embodiments and their effects. However, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0055] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clutch device for an aircraft radar suitable for vertical installation, characterized in that Comprising: A cylindrical housing (1) with an upper end cover at its top and a lower end cover (3) at its bottom; An input shaft (7) with one end passing through the upper end cover and extending into the cylindrical housing (1), and a disk body connected to the end thereof; the diameter of the disk body is larger than that of the input shaft, and the disk body and the input shaft are coaxial; A piston assembly (2) is provided between the input shaft (7) and the inner wall of the cylindrical housing (1); A ring-shaped moving disk (4) is provided on the lower end face of the piston assembly (2), wherein the inner diameter of the ring-shaped moving disk (4) is larger than the diameter of the disk body; An elastic member is provided between the piston assembly (2) and the disk body; An output shaft (11) with one end passing through the lower end cover (3) and extending into the cylindrical housing (1), and a static disk (5) horizontally arranged at the end thereof; the static disk (5) corresponds to the moving disk (4); The cavity of the cylindrical housing (1) between the piston assembly (2) and the upper end cover is filled with hydraulic oil; When the input shaft (7) rotates, the piston assembly (2) is pushed to move downward by adjusting the pressure of the hydraulic oil, so that the moving disk (4) fits with the static disk (5), thereby driving the output shaft (11) to rotate.

2. The clutch device for an aircraft radar adapted for vertical installation according to claim 1, characterized in that, When the pressure of the hydraulic oil is reduced by adjustment, the piston assembly is pushed to move upward under the action of the elastic member, so that the moving disk (4) separates from the static disk (5).

3. The clutch device for an aircraft radar adapted for vertical installation according to claim 1, wherein Further comprising: A first sleeve, arranged at the bottom of the upper end cover and located inside the cylindrical housing (1); One end of the input shaft (7) sequentially passes through the upper end cover and the first sleeve and extends into the cylindrical housing (1) to form a transmission end; the input shaft (7) is rotationally connected to the first sleeve.

4. The clutch device for an aircraft radar adapted for vertical installation according to claim 3, characterized in that, The input shaft (7) and the first sleeve are rotationally connected through a bearing.

5. The clutch device for an aircraft radar suitable for vertical installation according to claim 3, wherein, The piston assembly includes: A first piston ring (2-1), arranged between the first sleeve and the inner wall of the cylindrical housing (1); A second piston ring (2-2), sleeved on the part of the input shaft (7) between the lower end of the first sleeve and the moving disk (4); springs (9) are symmetrically arranged between the inner edge at the bottom of the second piston ring (2-2) and the disk body; The ring-shaped moving disk (4) is arranged at the outer edge at the bottom of the second piston ring (2-2); The first piston ring (2-1) is rotationally connected to the second piston ring (2-2).

6. The clutch device for an aircraft radar adapted for vertical installation according to claim 5, characterized in that, The cavity of the cylindrical housing (1) between the first piston ring (2-1) and the upper end cover is filled with hydraulic oil; When the input shaft (7) rotates, it drives the second piston ring (2-2) and the moving disk (4) at the bottom of the second piston ring (2-2) to rotate. By adjusting the pressure of the hydraulic oil, the first piston ring (2-1) and the second piston ring (2-2) are pushed to move downward, so that the moving disk (4) fits with the static disk (5), thereby driving the static disk (5) to rotate through the rotating moving disk (4), and further driving the output shaft (11) to rotate.

7. The clutch device for an aircraft radar suitable for vertical installation according to claim 5, characterized in that, The first piston ring (2-1) is provided with a stepped piston ring in cross section, so that the inner side of the lower part of the first piston ring (2-1) corresponds to the upper part of the second piston ring (2-2); A bearing is provided between the lower end portion of the first piston ring (2-1) and the upper end portion of the second piston ring (2-2).

8. The clutch device for an aircraft radar suitable for vertical installation according to claim 1, characterized in that, It further includes: A second sleeve, which is arranged on the lower end cover (3) and is located inside the cylindrical housing (1); One end of the output shaft (11) sequentially penetrates through the lower end cover (3) and the second sleeve and extends into the cylindrical housing (1) to form a free end; the output shaft (11) is rotatably connected to the second sleeve; A stationary disk (5), which is horizontally arranged on the free end.

9. The clutch device for an aircraft radar suitable for vertical installation according to claim 1, characterized in that, Oil inlets (6) and air release nozzles (8) are symmetrically arranged on the side wall of the cavity of the cylindrical housing (1) between the piston assembly (2) and the upper end cover; hydraulic oil is output into the cavity through the oil inlets (6) for pressurization; the cavity is depressurized by opening the air release nozzles (8).

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