Closed multidirectional liquid damper

Abstract

The invention provides a closed multidirectional liquid damper. The closed multidirectional liquid damper comprises a spherical cover, a U-shaped ring, a ball head column, a corrugated pipe, an oil filler plug, a rear cover and damping liquid. The spherical cover is connected with the front portion of the ball head column through the U-shaped ring to form a hollow first cavity, the inside of the corrugated pipe is a second cavity, one end of the corrugated pipe is connected with the inside of the ball head column, the other end of the corrugated pipe is provided with an oil filler plug, the rear cover is connected with the rear portion of the ball head column, and the first cavity and the second cavity are communicated and filled with damping liquid. The vibration reduction device has the beneficial effects that vibration in the horizontal direction can be treated, vibration in the vertical direction can also be treated, mechanical energy input by external vibration can be effectively converted into heat energy through flowing of the damping liquid, and therefore the purpose of vibration reduction is achieved; the hemispherical cavity design is adopted, so that the cavity volume variation caused by the unit stroke variation is larger, and the vibration reduction and energy dissipation capacity of the damper is enhanced; the vibration reduction and energy consumption functions can be achieved in multiple directions through elastic deformation of the U-shaped ring.

Description

Technical Field

[0001] The invention belongs to the technical field of vibration control, and in particular relates to a closed multi-directional liquid damper. Background Art

[0002] Dampers are widely used in various fields of production and construction, so they also need to meet the requirements of various working environments. The basic working principle of liquid dampers is to use the fluid resistance generated when liquid (such as dimethyl silicone oil) passes through narrow gaps or pores under controlled conditions to consume vibration energy. When a mechanical system or structure is subjected to external excitation, the liquid inside the liquid damper is forced to flow, thereby producing a damping effect and reducing the vibration amplitude.

[0003] Vibration and shock in spacecraft can cause damage to structural parts and electronic components. In order to minimize the impact of shock and vibration, higher requirements are placed on the damper in the vibration reduction system. A damper with high reliability, large damping coefficient, sensitive response, and the ability to meet multi-directional degrees of freedom and multi-directional damping vibration reduction is the development direction of dampers in spacecraft. Currently, most liquid dampers on the market are one-way or two-way dampers, which can only provide damping in one direction or two opposite directions, and because they are not sealed, liquid leakage is prone to occur. Therefore, there is an urgent need for a liquid damper that solves the above problems. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a closed multi-directional liquid damping device, which is particularly suitable for multi-directional damping and vibration reduction in spacecraft.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a closed multi-directional liquid damper, comprising:

[0006] Spherical cover, U-ring, ball stud, bellows, oil filling plug, rear cover and damping fluid;

[0007] The spherical cover is connected to the front of the ball stud through the U-shaped ring to form a hollow first cavity, the interior of the bellows is a second cavity, one end of the bellows is connected to the interior of the ball stud, the other end of the bellows is provided with the oil filling plug, the rear cover is connected to the rear of the ball stud, the first cavity and the second cavity are connected and the damping fluid is provided therein.

[0008] Preferably, the U-shaped ring is an elastic element.

[0009] Preferably, the bellows is an elastic element.

[0010] Preferably, the inner surface of the first cavity is hemispherical.

[0011] The advantages and positive effects of the present invention are as follows: due to the adoption of the above-mentioned technical scheme, it is not only able to handle horizontal vibrations, but also able to cope with vertical vibrations, and through the flow of the damping fluid, it is able to effectively convert the mechanical energy input by the external vibration into heat energy, thereby achieving the purpose of vibration reduction; the hemispherical cavity design makes the cavity volume change caused by the unit stroke change larger, thereby enhancing the vibration reduction and energy dissipation capacity of the damper; the elastic deformation of the U-shaped ring can realize the vibration reduction and energy dissipation function in multiple directions; the closed design avoids the leakage of the damping fluid, thereby improving the reliability and service life of the damper; it is sensitive to tiny vibrations, can respond to and consume vibration energy in a timely manner, and is suitable for occasions where precise vibration control is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the cross-sectional structure of an embodiment of the present invention

[0013] Figure 2 Schematic diagram of the planar structure of an embodiment of the present invention

[0014] Figure 3 Schematic diagram of a U-shaped ring structure according to an embodiment of the present invention

[0015] Figure 4-5 Schematic diagram of horizontal vibration reduction according to an embodiment of the present invention

[0016] Figure 6-7 Schematic diagram of vertical vibration reduction according to an embodiment of the present invention

[0017] In the figure:

[0018] 100, spherical cover 200, U-shaped ring 300, ball head column

[0019] 400, bellows 500, oil filling plug 600, rear cover

[0020] 700, damping fluid 800, first cavity 900, second cavity

[0021] 801, upper part of the first cavity 802, lower part of the first cavity 110, dividing line DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1-2As shown, the present invention provides a technical solution: a closed multi-directional liquid damper, comprising: a spherical cover 100, a U-shaped ring 200, a ball stud 300, a bellows 400, an oil filling plug 500, a rear cover 600 and a damping liquid 700. The spherical cover 100 is connected to the front of the ball stud 300 through the U-shaped ring 200 to form a hollow first cavity 800, the interior of the bellows 400 is a second cavity 900, one end of the bellows 400 is connected to the interior of the ball stud 300, the other end of the bellows 400 is provided with an oil filling plug 500, the rear cover 600 is connected to the rear of the ball stud 300, the first cavity 800 and the second cavity 900 are connected and the damping liquid 700 is provided therein. The damping liquid 700 is poured into the first cavity 800 and the second cavity 900 through the oil filling hole, and the oil filling plug 500 is used to seal and form a closed cavity. Such a design can not only handle horizontal vibrations, but also cope with vertical vibrations, and through the flow of the damping fluid 700, the mechanical energy of external vibration input can be effectively converted into heat energy, thereby achieving the purpose of vibration reduction; the closed design avoids the leakage of the damping fluid 700, and improves the reliability and service life of the damper; the vibration is directly transmitted to the U-shaped ring 200 through the spherical cover 100 or the rear cover 600, and the intermediate components that transmit vibrations are less sensitive to small vibrations, and can respond and consume vibration energy in a timely manner, which is suitable for occasions that require precise control of vibrations.

[0024] In one embodiment, if Figure 3 As shown, the U-shaped ring 200 is an elastic element. The elastic deformation of the U-shaped ring can achieve vibration reduction and energy dissipation functions in multiple directions.

[0025] In one embodiment, the bellows 400 is an elastic element.

[0026] In one embodiment, the inner surface of the first cavity 800 is hemispherical. The inner surface of other liquid damper cavities is usually a circular surface, and the cavity volume change caused by a unit stroke change is πr 2 The inner surface of the first cavity 800 of the present invention is a hemispherical surface, and the cavity volume change caused by the unit stroke change is 2πr 2 , compared with the circular inner surface, the volume change is doubled. The hemispherical cavity design makes the cavity volume change caused by the unit stroke change larger, which enhances the vibration reduction and energy dissipation capacity of the damper.

[0027] like Figure 4-5As shown, in the initial state, the damper composed of the spherical cover 100, the U-shaped ring 200, the ball stud 300, the bellows 400, the oil filling plug 500 and the rear cover 600 is in a static state, and the damping liquid 700 is filled in the cavity. The U-shaped ring 200 and the bellows 400 are elastic elements and are in a natural state, and the damping liquid 700 in the cavity is in a static state. When external vibration acts on the spherical cover 100 and the ball head column 300 inwardly in the horizontal direction at the same time, the horizontal distance between the spherical cover 100 and the ball head column 300 decreases, and the U-shaped ring 200 will deform within the elastic range, resulting in a reduction in the volume of the first cavity 800. Since the damping liquid 700 is not easy to compress, the damping liquid 700 in the first cavity 800 is forced to flow into the second cavity 900 through the damping hole to balance the volume change. The volume of the second cavity 900 increases, causing the bellows 400 to deform within the elastic range. When the damping liquid 700 flows through the damping hole, due to the shearing effect between the flow layers, the friction between the liquid molecules converts the mechanical energy transmitted by the vibration into heat energy, thereby consuming the vibration energy and achieving a vibration reduction effect. Conversely, when external vibration acts on the spherical cover 100 and the ball head column 300 in the horizontal direction at the same time, the horizontal distance between the spherical cover 100 and the ball head column 300 increases, resulting in an increase in the volume of the first cavity 800 and a decrease in the volume of the second cavity 900.

[0028] like Figure 6-7 As shown, when the external vibration applies an upward force to the spherical cover 100 in the vertical direction and a downward force to the ball head column 300, the distance between the spherical cover 100 and the ball head column 300 in the vertical direction increases, and the U-shaped ring 200 will deform within the elastic range, dividing the first cavity 800 into the first cavity upper half 801 and the first cavity lower half 802 by the dividing line 110, resulting in an increase in the volume of the first cavity upper half 801 and a decrease in the volume of the first cavity lower half 802. 0 is not easy to compress. Under the action of pressure, part of the damping liquid 700 in the lower part 802 of the first cavity flows above the dividing line 110, and the remaining part of the damping liquid 700 is forced to flow into the second cavity 900 through the damping hole to balance the volume change. The volume of the second cavity 900 increases, causing the bellows 400 to deform within the elastic range. When the damping liquid 700 flows through the damping hole, due to the shearing effect between the flow layers, the friction between the liquid molecules converts the mechanical energy transmitted by the vibration into heat energy, thereby consuming the vibration energy and achieving the vibration reduction effect. On the contrary, when the external vibration is in the vertical direction, a downward force is applied to the spherical cover 100 and an upward force is applied to the ball head column 300. In the vertical direction, the distance between the spherical cover 100 and the ball head column 300 decreases, resulting in a decrease in the volume of the upper part 801 of the first cavity, an increase in the volume of the lower part 802 of the first cavity, and an increase in the volume of the second cavity 900.

[0029] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A closed multi-directional liquid damper, characterized in that: include: Spherical cover, U-ring, ball stud, bellows, oil filling plug, rear cover and damping fluid; The spherical cover is connected to the front of the ball stud through the U-shaped ring to form a hollow first cavity, the interior of the bellows is a second cavity, one end of the bellows is connected to the interior of the ball stud, the other end of the bellows is provided with the oil filling plug, the rear cover is connected to the rear of the ball stud, the first cavity and the second cavity are connected and the damping fluid is provided therein.

2. The closed multi-directional liquid damper according to claim 1, characterized in that: The U-shaped ring is an elastic element.

3. The closed multi-directional liquid damper according to claim 1, characterized in that: The bellows is an elastic element.

4. The closed multi-directional liquid damper according to claim 1, characterized in that: The inner surface of the first cavity is hemispherical.

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