Feedback device for a full rotation propeller pitch system

Abstract

The utility model relates to the field of paddle variable pitch mechanism especially, it is a kind of feedback device of full-revolving propeller propeller variable pitch system, it includes bearing seat and sealing shell, the bearing seat is arranged in the sealing shell, the outer wall of the sealing shell is equipped with lifting plate, the bottom of the lifting plate is equipped with multiple feedback rods, the bottom of the feedback rod is equipped with the support plate for lifting rod connection, the outer wall of the bearing seat is fixed with feedback ware.The utility model sets up support plate and multiple feedback rods, so that the lifting of lifting rod acts on support plate first, and the guiding effect of feedback rod is utilized, so that support plate is evenly lifted, so that lifting plate is evenly lifted, can improve the detection accuracy of feedback ware.

Description

Technical Field

[0001] This utility model relates to the field of blade pitch control mechanisms, and in particular to a feedback device for a azimuth thruster propeller pitch control system. Background Technology

[0002] An azimuth thruster is a type of marine propulsion device. Its core feature is that the propeller can rotate horizontally 360 degrees, enabling omnidirectional propulsion and steering. It is widely used in vessels with high maneuverability requirements, such as tugboats, icebreakers, and marine engineering vessels. The feedback device of the azimuth thruster propeller pitch control system is used to detect changes in the propeller pitch after such changes occur.

[0003] Reference Figure 1 In the current variable pitch system's feedback device, the feedback unit 3 is mounted on the fixed plate 101, and a lifting plate 4 is installed at the bottom of the feedback unit 3. The lifting plate 4 is connected to the detection end of the feedback unit 3, and the lifting and lowering of the lifting plate 4 can be detected by the feedback unit 3. The change in propeller pitch is transmitted to the lifting rod 14 through a series of linkage structures. The lifting and lowering of the lifting rod 14 drives the lifting plate 4 to rise and fall, thereby realizing the detection of the change in propeller pitch.

[0004] However, the lifting rod 14 is on one side of the lifting plate 4, while the feedback device 3 is on the other side of the lifting plate 4. During the lifting process of the lifting rod 14, there is an uneven distribution of thrust, which causes the lifting plate 4 to tilt. At this time, the detection result of the feedback device 3 has obvious errors. Utility Model Content

[0005] To overcome the problem of reduced accuracy of feedback detection results caused by tilting and lifting of the lifting plate, this utility model provides a feedback device for a full-rotation propeller pitch-changing system.

[0006] This utility model provides a feedback device for a full-rotation propeller pitch control system, which adopts the following technical solution:

[0007] A feedback device for a azimuth thruster propeller pitch control system includes a bearing housing and a sealed housing. The bearing housing is disposed inside the sealed housing. A lifting plate is provided on the outer wall of the sealed housing. Multiple feedback rods are provided at the bottom end of the lifting plate. A support plate for connecting the lifting rods is provided at the bottom end of the feedback rods. A feedback device is fixed on the outer wall of the bearing housing.

[0008] In one specific implementation, a bearing is provided between the feedback rod and the lifting plate.

[0009] In one specific implementation, the bearing includes a first connecting ring and a second connecting ring, the first connecting ring being disposed within the second connecting ring, and a first ball bearing being disposed between the first connecting ring and the second connecting ring.

[0010] In one specific implementation, the bearing further includes a third connecting ring disposed at the bottom end of the first connecting ring, and a second ball bearing is provided between the first connecting ring and the third connecting ring.

[0011] In one specific implementation, the top of the sealing housing is provided with a first pressure ring, and a third ball bearing is provided between the first pressure ring and the sealing housing.

[0012] In one specific implementation, a second pressure ring is provided at the bottom end of the sealing housing, and a fourth ball bearing is provided between the second pressure ring and the sealing housing.

[0013] In one specific implementation, the bearing housing has multiple mounting grooves on the side facing the sealing housing, and each mounting groove is provided with a high-pressure oil seal.

[0014] In summary, this utility model has the following beneficial effects:

[0015] 1. Under the guidance of multiple feedback rods, the support plate can rise and fall evenly, minimizing tilting and making the lifting plate rise and fall more evenly, thereby improving the detection accuracy of the feedback device.

[0016] 2. The first and second pressure rings form bearings at both ends of the sealing housing, which improves the stability of the relative rotation of the sealing housing and the bearing seat, reduces the friction when the sealing housing and the bearing seat rotate relative to each other, and extends the service life of the sealing housing and the bearing seat. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a feedback device in the prior art.

[0018] Figure 2 This is a schematic diagram of the feedback device in the azimuth thruster propeller pitch control system.

[0019] Explanation of reference numerals in the attached drawings: 1. Bearing housing; 2. Sealing housing; 3. Feedback device; 4. Lifting plate; 5. Bearing; 51. First connecting ring; 52. Second connecting ring; 53. Third connecting ring; 6. First ball bearing; 7. Second ball bearing; 8. First pressure ring; 9. Third ball bearing; 10. Second pressure ring; 11. Fourth ball bearing; 12. Feedback rod; 13. Support plate; 14. Lifting rod; 15. Mounting groove; 16. High-pressure oil seal; 101. Fixing plate. Detailed Implementation

[0020] The following combination Figure 2 The present invention will be described in further detail below.

[0021] Reference Figure 2 The feedback device of the azimuth thruster propeller pitch control system includes a bearing housing 1 and a sealed housing 2. The bearing housing 1 is located inside the sealed housing 2, and a lifting plate 4 is installed on the outer wall of the sealed housing 2. The lifting plate 4 can slide up and down on the outer wall of the sealed housing 2. The feedback device 3 is fixed on the outer wall of the bearing housing 1.

[0022] Reference Figure 2 A bearing 5 is provided on the bottom surface of the lifting plate 4. Multiple feedback rods 12 are located at the bottom end of the bearing 5, and a support plate 13 is located at the bottom end of each feedback rod 12. All feedback rods 12 are connected to the support plate 13. A lifting rod 14 is connected to the bottom surface of the support plate 13. When the lifting rod 14 rises and falls, it pushes and pulls the support plate 13, causing it to move up and down, thereby driving the multiple feedback rods 12 to rise and fall. The feedback rods 12 then drive the lifting plate 4 to rise and fall, thus enabling the detection of changes in the slurry pitch. Furthermore, because the changes in slurry pitch are transmitted through the rising and falling of the support plate 13 and the feedback rods 12, the thrust and pull of the lifting rod 14 are more evenly distributed on the lifting plate 4, thereby improving the detection accuracy of the feedback device 3.

[0023] Reference Figure 2 The bearing 5 includes a first connecting ring 51, a second connecting ring 52, and a third connecting ring 53. The first connecting ring 51 is disposed inside the second connecting ring 52, and a first ball bearing 6 is provided between the first connecting ring 51 and the second connecting ring 52. The third connecting ring 53 is disposed at the bottom end of the first connecting ring 51, and a second ball bearing 7 is provided between the first connecting ring 51 and the third connecting ring 53. The lifting plate 4 and the sealing housing 2 rotate relative to each other, thus the first connecting ring 51 and the second connecting ring 52 support the lifting plate 4 and reduce the frictional resistance during rotation. Simultaneously, the lifting plate 4 also slides up and down on the sealing housing 2, at which time the first connecting ring 51 and the third connecting ring 53 further reduce the frictional resistance during lifting.

[0024] Reference Figure 2 A first pressure ring 8 is fixed to the top of the sealing housing 2, and a third ball bearing 9 is provided between the first pressure ring 8 and the sealing housing 2. A second pressure ring 10 is fixed to the bottom of the sealing housing 2, and a fourth ball bearing 11 is provided between the second pressure ring 10 and the sealing housing 2. The sealing housing 2 rotates relative to the bearing seat 1. Therefore, the relative friction between the bearing seat 1 and the sealing housing 2 is reduced by the third ball bearing 5 and the fourth ball bearing 11, and the coaxiality between the bearing seat 1 and the sealing housing 2 is improved. This enhances the stability of the sealing housing 2 rotating on the bearing seat 1 and extends the service life of the bearing seat 1 and the sealing housing 2.

[0025] Reference Figure 2The bearing housing 5 has multiple mounting grooves 15 on the side facing the sealing housing 2, and a high-pressure oil seal 16 is engaged in each mounting groove 15. The high-pressure oil seal 16 seals the gap between the bearing housing 5 and the sealing housing 2, allowing the hydraulic oil to flow along the designed route and provide comprehensive lubrication to the bearing housing 5 and the sealing housing 2.

[0026] The implementation principle of this utility model embodiment is as follows: the lifting rod 14 rises and falls due to changes in the paddle pitch, which is transmitted to the feedback rod 12 through the support plate 13, causing the feedback rod 12 to rise and fall. The feedback rod 12 drives the bearing 5 to rise and fall, which in turn drives the lifting plate 4 to rise and fall, thereby enabling the feedback device 3 to measure the change in paddle pitch. The lifting rod 14 no longer directly pushes and pulls the lifting plate 4, but acts on the support plate 13. Under the guidance of the feedback rod 12, the support plate 13 can rise and fall evenly, making the detection results of the feedback device 3 more accurate.

[0027] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A feedback device for a full-rotation propeller pitch control system, characterized in that: The device includes a bearing housing (1) and a sealing housing (2). The bearing housing (1) is disposed inside the sealing housing (2). A lifting plate (4) is provided on the outer wall of the sealing housing (2). Multiple feedback rods (12) are provided at the bottom end of the lifting plate (4). A support plate (13) for connecting the lifting rod (14) is provided at the bottom end of the feedback rod (12). A feedback device (3) is fixed on the outer wall of the bearing housing (1).

2. The feedback device of the azimuth thruster propeller pitch control system according to claim 1, characterized in that: A bearing (5) is provided between the feedback rod (12) and the lifting plate (4).

3. The feedback device of the azimuth thruster propeller pitch control system according to claim 2, characterized in that: The bearing (5) includes a first connecting ring (51) and a second connecting ring (52). The first connecting ring (51) is disposed inside the second connecting ring (52), and a first ball (6) is provided between the first connecting ring (51) and the second connecting ring (52).

4. The feedback device of the azimuth thruster propeller pitch control system according to claim 3, characterized in that: The bearing (5) further includes a third connecting ring (53), which is disposed at the bottom end of the first connecting ring (51), and a second ball (7) is provided between the first connecting ring (51) and the third connecting ring (53).

5. The feedback device for the azimuth thruster propeller pitch control system according to claim 1, characterized in that: The top of the sealing housing (2) is provided with a first pressure ring (8), and a third ball bearing (9) is provided between the first pressure ring (8) and the sealing housing (2).

6. The feedback device of the azimuth thruster propeller pitch control system according to claim 5, characterized in that: The bottom end of the sealing housing (2) is provided with a second pressure ring (10), and a fourth ball bearing (11) is provided between the second pressure ring (10) and the sealing housing (2).

7. The feedback device of the azimuth thruster propeller pitch control system according to claim 1, characterized in that: The bearing housing (1) has multiple mounting grooves (15) on the side facing the sealing housing (2), and each mounting groove (15) is provided with a high-pressure oil seal (16).

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