A gyrostat for reducing rolling

Abstract

This invention relates to the field of ship roll reduction technology, specifically disclosing a roll-reducing gyroscope. The roll-reducing gyroscope includes a base, a flywheel frame, a flywheel rotatably connected to the flywheel frame, and a torque application device for applying braking torque to the flywheel frame. The flywheel frame and base are rotatably connected via a precession shaft. The torque application device includes a sliding sleeve, a slider, a swing arm, and a buffer. The sliding sleeve is fixedly connected to the base, and the slider is slidably embedded within the sliding sleeve. The sliding sleeve and slider are configured such that the slider can reciprocate along the tangent of the precession shaft axis. The swing arm is fixedly connected to the precession shaft and can reciprocate with the precession of the flywheel. When the swing arm reaches the end of its stroke with the flywheel, it pushes the slider. The buffer is fixedly connected to the base, and its buffer portion can be pushed and compressed by the slider to apply torque to the flywheel frame. This roll-reducing gyroscope has good roll reduction effect, and the buffer has a long service life.

Description

Technical Field

[0001] This invention relates to the field of ship roll reduction technology, and more particularly to a roll reduction gyroscope. Background Technology

[0002] Anti-roll gyroscopes have excellent anti-roll effects and are unaffected by ship speed, thus they are increasingly widely used in the field of ship roll reduction. An anti-roll gyroscope contains a heavy-duty flywheel. The high-speed rotating flywheel has angular momentum and the precession effect of the gyroscope. The hull's rolling motion causes the rotating flywheel to generate a precession torque, pushing the flywheel and flywheel frame to precess together. Simultaneously, the rotating flywheel generates a roll-damping torque during precession, which is transmitted to the hull through the flywheel frame and base, suppressing the hull's rolling.

[0003] Most roll-damping gyroscopes have a precession angle range of -90° to +90°. The rolling of a ship will cause the flywheel and flywheel frame to precess. In order to control the precession angular velocity of the flywheel, limit the precession angle range, and prevent equipment damage caused by uncontrolled precession and excessive precession, a torque application device is required. Torque application devices can be divided into controllable passive and uncontrollable passive types.

[0004] Controllable passive torque application devices have a good anti-sway effect, but their structure is more complex and the cost is higher.

[0005] Uncontrollable passive torque application devices are simple in structure and low in cost, but have poor anti-sway effect.

[0006] The reason why uncontrollable passive torque application devices are less effective in the prior art is that the hydraulic damper is directly connected to the flywheel frame, which applies resistance throughout the entire precession stroke. This results in excessive resistance on the flywheel during the initial precession phase, making it difficult to start and reducing the anti-roll effect. Summary of the Invention

[0007] Based on the above, the purpose of this invention is to provide a gyroscope with the advantages of simple torque application device structure, long service life of buffer component and good anti-roll effect.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A roll-damping gyroscope includes a base, a flywheel frame, and a flywheel rotatably connected to the flywheel frame. The flywheel frame includes precession shafts disposed on both sides thereof, and the flywheel frame and the base are rotatably connected via the precession shafts. The gyroscope is characterized by further including a torque applying device for applying braking torque to the flywheel frame, the torque applying device comprising:

[0010] A sliding sleeve and a slider, wherein the sliding sleeve is fixedly connected to the base, and the slider is slidably embedded in the sliding sleeve, and the sliding sleeve and the slider are configured such that the slider can reciprocate along the tangential direction of the precession shaft axis;

[0011] A swing arm is fixedly connected to the precession shaft and can reciprocate with the precession of the flywheel. When the swing arm moves to the end of its stroke with the flywheel, it pushes the slider.

[0012] A buffer element is fixedly connected to the base. The buffer portion of the buffer element can be pushed and compressed by the slider to apply torque to the flywheel frame.

[0013] As a preferred embodiment of a roll-damping gyroscope, the slider includes a sliding portion and a blocking portion protruding from the sliding portion, the blocking portion being collided with by the swing arm and pushed to slide the slider.

[0014] As a preferred embodiment of a gyroscope with anti-roll capability, the sliding sleeve has a receiving groove, the sliding part is slidably disposed in the receiving groove, and the blocking part extends out of the receiving groove.

[0015] As a preferred embodiment of a roll-damping gyroscope, the swing arm includes two support arms and a connecting part. The connecting part is connected to the end of the precession shaft. The two support arms are arranged radially spaced along the precession shaft. When the swing arm precesses with the flywheel, it can push the slider to move back and forth. In addition, there are two buffers, which are respectively arranged at both ends of the slider.

[0016] As a preferred embodiment of a roll-damping gyroscope, the buffer is a hydraulic damper, a hydraulic buffer, a compressed gas buffer, or an elastic buffer.

[0017] As a preferred embodiment of a roll-damping gyroscope, the roll-damping gyroscope is mounted on a ship, the base is fixedly connected to the hull of the ship, and the roll-damping gyroscope is used to suppress the rolling motion of the ship.

[0018] The beneficial effects of this invention are as follows:

[0019] This invention provides a roll-damping gyroscope in which the braking torque of the torque application device is applied only at the end of the precession stroke, making the flywheel run more smoothly at the beginning of the precession stroke and improving the roll-damping effect of the gyroscope. Simultaneously, by employing a sliding sleeve and slider mechanism, the buffer portion of the buffer is subjected only to axial compressive force, effectively improving the service life of the buffer. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the anti-roll gyroscope provided in an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of the anti-roll gyroscope provided in an embodiment of the present invention;

[0023] Figure 3 This is a side view of the anti-roll gyroscope provided in an embodiment of the present invention;

[0024] Figure 4 This is an exploded view of the torque application device provided in an embodiment of the present invention;

[0025] Figure 5 This is an assembly diagram of the anti-roll gyroscope and a ship provided in an embodiment of the present invention;

[0026] Figure 6 This is a side view of the anti-roll gyroscope provided in an embodiment of the present invention at the first precession angle;

[0027] Figure 7 This is a side view of the anti-roll gyroscope provided in an embodiment of the present invention at the second precession angle;

[0028] Figure 8 This is a side view of the anti-roll gyroscope provided in an embodiment of the present invention at the third precession angle;

[0029] Figure 9 This is a side view of the anti-roll gyroscope provided in an embodiment of the present invention at the fourth precession angle;

[0030] Figure 10 This is a side view of the anti-roll gyroscope provided in an embodiment of the present invention at the fifth precession angle.

[0031] In the picture:

[0032] 1. Base; 2. Flywheel frame; 3. Flywheel; 4. Precession shaft; 5. Swing arm; 51. Connecting part; 52. Support arm; 6. Torque application device; 61. Slider; 611. Sliding part; 612. Protrusion; 62. Buffer; 63. Sliding sleeve; 7. Round nut; 8. Hull keel; 9. Drive motor; 91. Stator; 92. Rotor;

[0033] X - Flywheel precession axis; Y - Ship's yaw axis; Z - Flywheel rotation axis. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0035] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are merely used for descriptive distinction and have no special meaning.

[0038] This embodiment provides a roll-damping gyroscope, the base of which is fixedly connected to the hull of a ship. The roll-damping gyroscope is used to suppress the rolling motion of the ship and improve the stability and comfort of the ship.

[0039] Specifically, such as Figures 1 to 4As shown, the anti-roll gyroscope provided in this embodiment includes a base 1, a flywheel frame 2, a flywheel 3, and a torque application device 6. The flywheel 3 and the flywheel frame 2 are rotatably connected through a first bearing so that the flywheel frame 2 provides rotational support for the flywheel 3. The flywheel frame 2 includes precession shafts 4 disposed on both sides thereon. The flywheel frame 2 is rotatably connected to the base 1 through the precession shafts 4. The flange portions of the two precession shafts 4 are fixedly connected to the outer side of the flywheel frame 2, and the shaft extension portions of the precession shafts 4 are rotatably connected to the base 1 through a second bearing.

[0040] More specifically, the anti-roll gyroscope also includes a drive motor 9, which is connected to the flywheel 3 to drive the flywheel 3 to rotate at high speed around its rotation axis Z. Optionally, the drive motor 9 is a frameless motor, with the stator 91 fixedly connected to the flywheel frame 2 and the rotor 92 fixedly connected to the flywheel 3. Frameless motors have a compact structure and occupy less space. Of course, in other embodiments, the drive motor 9 can also be a motor with other structures.

[0041] In this embodiment, the base 1 is rectangular and has split bearing housing structures on both sides, which facilitates the disassembly and assembly of the flywheel frame 2 and the second bearing. The structure is simple and easy to manufacture. Exemplarily, when the ship oscillates around the Y-axis, the high-speed rotating flywheel 3 generates a precession torque, which drives the flywheel 3 and the flywheel frame 2 to rotate relative to the base 1 around the precession axis X. The torque applying device 6 is used to apply a braking torque to the flywheel frame 2 to limit the precession angle and angular velocity of the flywheel 3.

[0042] Preferably, the flywheel frame 2 includes an upper housing and a lower housing, which are fastened together to form a sealed receiving cavity in which the flywheel 3 is housed, protecting the flywheel 3 from external environmental influences or corrosion. More preferably, the upper housing and the lower housing are detachably connected, facilitating the installation and removal of the flywheel frame 2 and the flywheel 3.

[0043] like Figures 1 to 4 As shown, the torque application device 6 includes a slider 61, a sliding sleeve 63, a swing arm 5, and a buffer 62. The sliding sleeve 63 is fixedly connected to the base 1, and the slider 61 is slidably embedded in the sliding sleeve 63. The sliding sleeve 63 and the slider 61 are configured such that the slider 61 can reciprocate along the tangential direction of the precession axis X. The swing arm 5 is fixedly connected to the precession shaft 4 and can reciprocate with the precession of the flywheel 3. When the swing arm 5 reaches the end of its stroke with the flywheel 3, it pushes the slider 61. The buffer 62 is fixedly connected to the base 1. The buffer part of the buffer 62 can be pushed and compressed by the slider 61 to apply torque to the flywheel frame 2.

[0044] The anti-roll gyroscope provided in this embodiment has a swing arm 5 at one end of the flywheel frame 2. When the flywheel frame 2 rotates relative to the base 1, its precession shaft 4 rotates relative to the base 1, causing the swing arm 5 to swing around the precession axis X. During the swing, it pushes the slider 61 to slide, and the slider 61 impacts the buffer 62. The buffer 62 is compressed and provides a reaction force to the slider 61, that is, it applies a braking torque to the flywheel frame 2 and the flywheel 3, which can effectively prevent precession from exceeding the range. By setting the slider 61, the buffer 62 is only subjected to positive pressure, that is, only axial force and no radial force, which improves the working condition of the buffer 62 and extends its service life. In the above structure, the braking torque is only applied at the end of the precession stroke, making the flywheel 3 smoother at the start of precession, which can effectively improve the anti-roll effect.

[0045] Optionally, since there are two precession shafts 4, two sets of torque application devices 6 can be provided. The two sets of torque application devices 6 are located on opposite sides of the base 1, which can accommodate larger-sized anti-roll gyroscopes.

[0046] Optionally, the buffer 62 can be a hydraulic damper, a hydraulic buffer, a compressed gas buffer, or an elastic buffer, all of which can provide braking torque.

[0047] Furthermore, the slider 61 includes a sliding portion 611 and a blocking portion 612 protruding from the sliding portion 611. When the swing arm 5 swings with the flywheel frame 2, it abuts against the blocking portion 612. When the swing arm 5 swings, it pushes the blocking portion 612, thereby causing the slider 61 to slide.

[0048] Specifically, the sliding sleeve 63 has a receiving groove, the sliding part 611 is slidably disposed in the receiving groove, and the blocking part 612 extends out of the receiving groove. When the swing arm 5 swings, it can contact and push the blocking part 612, thereby driving the sliding part 611 to slide in the receiving groove. In this embodiment, the movement direction of the slider 61 is tangent to the precession axis X. The shape of the receiving groove can be circular, square, triangular, dovetail-shaped, T-shaped, etc., and is not limited here.

[0049] The swing arm 5 includes support arms 52 and connecting parts 51. Preferably, there are two support arms 51. The connecting parts 51 are connected to the shaft end of the precession shaft 4. The two support arms 52 are arranged radially spaced along the precession shaft 4. There are also two buffer members 62, which are respectively disposed at both ends of the slider 61. By providing two support arms 52 and two buffer members 62, the swing arm 5 can push the slider 61 to reciprocate during the swinging process, so that both ends of the precession stroke have a braking effect. The structure is simple and the anti-sway effect is improved. By changing the distance between the two support arms 52, the stroke segment in which the braking torque is applied can be changed to further optimize and improve the anti-sway effect.

[0050] In this embodiment, preferably, the rocker arm 5 and the precession shaft 4 are fixedly connected to the round nut 7 via a spline, which can transmit a large torque and facilitate disassembly and assembly. In other embodiments, the rocker arm 5 and the precession shaft 4 can be fixedly connected in other ways, such as by welding, bolting, or pinning, etc., which are not limited here.

[0051] The anti-roll gyroscope provided in this embodiment applies braking torque only at the end of the precession stroke, making the flywheel 3 smoother at the start of precession and improving the anti-roll effect of the gyroscope. At the same time, by using the sliding sleeve 63 and slider 61 mechanism, the buffer part of the buffer 62 is only subjected to axial compressive force, which can effectively improve its service life.

[0052] like Figure 5 As shown, the roll stabilizing gyroscope is mounted on the hull to reduce the ship's roll. The base 1 of the roll stabilizing gyroscope is fixedly connected to the hull keel 8 by bolts, and its precession axis X is perpendicular to the mid-longitudinal section of the ship, thus reducing the ship's roll. In other embodiments, when the precession axis X of the roll stabilizing gyroscope is mounted parallel to the mid-longitudinal section of the ship, it can reduce the ship's pitch. To further illustrate the working principle of the roll stabilizing gyroscope provided in this embodiment, the following are side views of the flywheel 3 at various precession positions during the operation of the roll stabilizing gyroscope:

[0053] For example, the precession angle range is -α to +α; the braking torque application range is -β to -α and +β to +α. The flywheel 3 and flywheel frame 2 reciprocate within the precession angle range, and the swing arm 5 swings back and forth accordingly. In this embodiment, α = 60° and β = 30°. Of course, in other embodiments, the precession angle range and the braking torque application range can also be designed to other angles, and are not limited to this.

[0054] like Figures 6 to 10 As shown, there are two buffer components 62, one of which is the first buffer component and the other is the second buffer component. When the hull is affected by wind and waves and rolls clockwise around the Y-axis, the rolling motion of the hull causes the rotating flywheel 3 to generate a precession torque, which drives the flywheel 3 and the flywheel frame 2 to precess together. The precession stroke of the anti-roll gyroscope is sequentially... Figures 6-7 - Figures 8-9 - Figure 10 The sequential motion is shown. Within the interval -α to +β, i.e. Figures 6-7 - Figures 8-9 In the indicated interval, buffer 62 is not compressed, therefore no braking torque is applied during this travel segment, resulting in a smooth precession start; in the +β to +α interval, i.e. Figures 9-10In the indicated range, the swing arm 5 pushes the slider 61 to move, and the slider 61 pushes the buffer part of the first buffer member. The first buffer member applies a braking torque, and the precession of the flywheel 3 is hindered, decelerating to a stop. Due to the travel limitation of the buffer member 62, it can also play a limiting role at the end position. At the same time, the rotating flywheel 3 generates a roll-damping torque during precession. The roll-damping torque is transmitted to the hull through the flywheel frame 2 and the base 1, suppressing the hull's roll.

[0055] Similarly, when the hull is affected by wind and waves and rolls counterclockwise around the Y-axis, the rolling motion of the hull causes the rotating flywheel 3 to generate a precession torque, which drives the flywheel 3 and the flywheel frame 2 to precess together. The precession stroke of the anti-roll gyroscope is sequentially... Figures 10-9 - Figures 8-7 - Figure 6 The sequential motion is shown. Within the interval +α to -β, i.e. Figures 10-9 - Figures 8-7 In the indicated interval, buffer 62 is not compressed, therefore no braking torque is applied during this travel segment, resulting in a smooth precession start; in the -β to -α interval, i.e. Figures 7-6 In the indicated section, the swing arm 5 pushes the slider 61 to move, the slider 61 pushes the buffer part of the second buffer, the second buffer applies a braking torque, the precession of the flywheel 3 is blocked, and it decelerates to a stop; due to the travel limitation of the buffer 62, it can also play a limiting role at the end position. At the same time, the rotating flywheel 3 generates a roll-damping torque during precession, which is transmitted to the hull through the flywheel frame 2 and the base 1 to suppress the hull's roll.

[0056] It should be noted that the above is based on Figures 6 to 10 The described roll reduction process is only a typical precession cycle. The roll reduction principle of the roll reduction gyroscope and its application on ships are existing technologies in this field and are easily understood by those skilled in the art, so they will not be elaborated further.

[0057] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A gyroscope for reducing sway, comprising a base (1), a flywheel frame (2), and a flywheel (3) rotatably connected to the flywheel frame (2), wherein the flywheel frame (2) includes precession shafts (4) disposed on both sides thereof, and the flywheel frame (2) and the base (1) are rotatably connected via the precession shafts (4), characterized in that, It also includes a torque applying device (6) for applying braking torque to the flywheel frame (2), the torque applying device (6) comprising: The sliding sleeve (63) and the slider (61) are fixedly connected to the base (1), and the slider (61) is slidably embedded in the sliding sleeve (63). The sliding sleeve (63) and the slider (61) are configured such that the slider (61) can reciprocate along the tangential direction of the axis of the precession shaft (4). The swing arm (5) is fixedly connected to the advance shaft (4) and can swing back and forth with the advance of the flywheel (3). When the swing arm (5) advances with the flywheel (3) to the end of the stroke, it pushes the slider (61). A buffer (62) is fixedly connected to the base (1). The buffer portion of the buffer (62) can be pushed and compressed by the slider (61) to apply torque to the flywheel frame (2).

2. The anti-roll gyroscope according to claim 1, characterized in that, The slider (61) includes a sliding part (611) and a blocking part (612) protruding from the sliding part (611). The blocking part (612) can be collided with by the swing arm (5) and push the slider (61) to slide.

3. The anti-roll gyroscope according to claim 2, characterized in that, The sliding sleeve (63) has a receiving groove, the sliding part (611) is slidably disposed in the receiving groove, and the blocking part (612) extends out of the receiving groove.

4. The anti-roll gyroscope according to claim 1, characterized in that, The swing arm (5) includes two support arms (52) and a connecting part (51). The connecting part (51) is connected to the shaft end of the precession shaft (4). The two support arms (52) are arranged radially at intervals along the precession shaft (4). When the swing arm (5) advances with the flywheel (3), it can push the slider (61) to move back and forth. The number of buffers (62) is two, and the two buffers (62) are respectively arranged at both ends of the slider (61).

5. The anti-roll gyroscope according to claim 1, characterized in that, The buffer (62) is a hydraulic damper, a hydraulic buffer, a compressed gas buffer, or an elastic buffer.

6. The anti-roll gyroscope according to any one of claims 1-5, characterized in that, The anti-roll gyroscope is installed on the ship, and the base (1) is fixedly connected to the hull of the ship. The anti-roll gyroscope is used to suppress the swaying motion of the ship.

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