An underwater pressure balancing device based on magnetorheological effect

Abstract

The present invention relates to an underwater pressure balancing device based on magnetorheological effect. The pressure balancing device mainly balances the pressure of seawater according to the oil and magnetorheological fluid inside the device, and mainly consists of an upper shell, screws, a current controller, a protective cover, a lower shell, bolts, a No. 1 nut, a piston rod, a No. 2 sealing ring, a magnetorheological fluid, an excitation coil, an energized wire, a No. 1 sealing ring, a pressure plate, a rolling diaphragm, oil, a No. 2 nut, an intermediate shell, an inner shell, a No. 3 sealing ring, and a No. 4 sealing ring. The underwater pressure balancing device based on magnetorheological effect of the present invention has the characteristics of long life, rapid response, strong adaptability to the working environment, and long-term repeated use, etc. It solves the problems of the underwater pressure balancing device on the market that the adaptability to the working environment is not strong and the service life is short, and improves the versatility of the underwater pressure balancing device.

Description

Technical Field

[0001] The invention relates to a pressure balancing device, in particular to an underwater pressure balancing device based on magnetorheological effect. Background Art

[0002] The ocean occupies about 71% of the earth's surface area, with an average water depth of about 3795 meters. So far, only 5% of the seabed has been explored by humans, and 95% of the seabed is unknown, so the development of the ocean is imperative. In recent years, with the exploration and development of the ocean by humans, the continuous development of submersible exploration technology, and the submersible exploration device has received more and more attention, among which the underwater pressure balance device is one of the research focuses. The underwater pressure balance device is an important component of the submersible exploration equipment and is widely used in submarines and underwater speedboats. The underwater pressure balance device is not only required to achieve pressure balance at different depths, but also required to be reusable and stable. Then the existing pressure balance devices on the market have the problem of being unable to be reused for a long time for complex underwater pressure environments, and cannot meet the requirements of use and environmental protection. Magnetorheological fluid has the characteristics of variable stiffness and adjustable viscosity under the excitation of an external magnetic field. The present invention proposes an underwater pressure balance device based on magnetorheological effect, which has the characteristics of stable operation, reliable performance, and long-term reusability. Summary of the invention

[0003] The purpose of the present invention is to provide an underwater pressure balancing device based on magnetorheological effect, which can solve the problem that the device needs to be suitable for underwater pressures at different depths and can be reused for a long time.

[0004] In order to effectively solve the above-mentioned technical problems, the present invention is implemented in the following manner: the device is composed of an upper shell (1), a screw (2), a current controller (3), a protective cover (4), a lower shell (5), a bolt (6), a No. 1 nut (7), a piston rod (8), a No. 2 sealing ring (9), a magnetorheological fluid (10), an excitation coil (11), an energized wire (12), a No. 1 sealing ring (13), a pressure plate (14), a rolling diaphragm (15), oil (16), a No. 2 nut (17), an intermediate shell (18), an inner shell (19), a No. 3 sealing ring (20), and a No. 4 sealing ring (21).

[0005] A layer of rolling diaphragm (15) is sandwiched between the upper shell (1) and the lower shell (5), and they are fastened together by screws (2), thereby forming the outer shell of the device;

[0006] The pressure balancing device comprises, from inside to outside, a piston rod (8), an excitation coil (11), a magnetorheological fluid (10), a No. 2 sealing ring (9), a No. 3 sealing ring (20), an inner shell (19), a current controller (3), an intermediate shell (18), a No. 1 sealing ring (13), a rolling diaphragm (15), a pressure plate (14), a No. 4 sealing ring (21), a No. 2 nut (17) and oil (16);

[0007] The top of the piston rod (8) is installed with an inner shell (19), an intermediate shell (18), a No. 1 sealing ring (13), a rolling diaphragm (15), a pressure plate (14), a No. 4 sealing ring (21), and a No. 2 nut (17) in sequence from bottom to top, and the piston rod (8) is threadedly connected with the No. 2 nut (17) by using a thread.

[0008] Two excitation coils (11) are sequentially installed in the middle of the piston rod (8) from bottom to top, and the excitation coils (11) are connected to a current controller (3) installed on the inner wall of the intermediate housing (18) through a current-carrying wire (12) built into the piston rod (8);

[0009] The current controller (3) and the energized conductor (12) are waterproofed;

[0010] The excitation coil (11) is provided with a protective cover (4) outside so as to isolate the magnetorheological fluid (10) in the inner shell (19);

[0011] The inner shell (19) is filled with magnetorheological fluid (10), the piston rod (8) first passes through the No. 2 sealing ring (9), and then the inner shell (19) and the lower shell are threadedly matched using bolts (6) and No. 1 nuts (7);

[0012] The fourth sealing ring (21) performs secondary sealing to prevent oil from entering;

[0013] The first sealing ring (13) performs secondary sealing to prevent seawater from entering;

[0014] The third sealing ring (20) performs secondary sealing to prevent seawater from entering and magnetorheological fluid from leaking out;

[0015] The second sealing ring (9) performs secondary sealing to prevent seawater from entering and magnetorheological fluid from leaking out;

[0016] The oil (16) inside the underwater pressure balancing device is filled into the device through the oil filling port.

[0017] The positive effect of the underwater pressure balancing device based on magnetorheological effect described in this patent is that based on the characteristics of high control accuracy, fast response speed and long-term repeated use of magnetorheological fluid, the traditional underwater pressure balancing device is improved, and the underwater pressure balancing device based on magnetorheological effect is designed to have the characteristics of long life, rapid response, strong adaptability to the working environment, and long-term repeated use. It solves the problems of underwater pressure balancing devices on the market that are not adaptable to the working environment and have a short service life, and improves the versatility of the underwater pressure balancing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the internal structure of an underwater pressure balancing device based on magnetorheological effect. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0020] exist Figure 1The invention discloses an underwater pressure balancing device based on magnetorheological effect, which mainly comprises an upper shell (1), a screw (2), a current controller (3), a protective sleeve (4), a lower shell (5), a bolt (6), a No. 1 nut (7), a piston rod (8), a No. 2 sealing ring (9), a magnetorheological fluid (10), an excitation coil (11), an energized wire (12), a No. 1 sealing ring (13), a pressure plate (14), a rolling diaphragm (15), oil (16), a No. 2 nut (17), an intermediate shell (18), an inner shell (19), a No. 3 sealing ring (20), and a No. 4 sealing ring (21). A layer of rolling diaphragm (15) is sandwiched between the upper shell (1) and the lower shell (5), and they are fastened together by screws (2), thereby forming the outer shell of the device; the interior of the pressure balancing device comprises, from the inside to the outside, a piston rod (8), an excitation coil (11), a magnetorheological fluid (10), a second sealing ring (9), a third sealing ring (20), an inner shell (19), a current controller (3), an intermediate shell (18), a first sealing ring (13), a rolling diaphragm (15), a pressure plate (14), a fourth No. 1 sealing ring (21), No. 2 nut (17) and oil (16); the top of the piston rod (8) is installed with an inner shell (19), an intermediate shell (18), a No. 1 sealing ring (13), a rolling diaphragm (15), a pressure plate (14), a No. 4 sealing ring (21), and a No. 2 nut (17) in sequence from bottom to top, and the piston rod (8) is threadedly connected with the No. 2 nut (17) by using a thread; the middle part of the piston rod (8) is installed with two excitation coils (11) in sequence from bottom to top, and the excitation coils (11 ) is connected to a current controller (3) installed on the inner wall of an intermediate housing (18) through an electric conductor (12) built into the piston rod (8); the current controller (3) and the electric conductor (12) are waterproofed; a protective cover (4) is installed outside the excitation coil (11) to isolate the magnetorheological fluid (10) in the inner housing (19); the inner housing (19) is filled with magnetorheological fluid (10), the piston rod (8) first passes through the second sealing ring (9), and then the inner housing (19) and The lower shell is threadedly matched with bolts (6) and No. 1 nuts (7); the No. 4 sealing ring (21) performs secondary sealing to prevent oil from entering; the No. 1 sealing ring (13) performs secondary sealing to prevent seawater from entering; the No. 3 sealing ring (20) performs secondary sealing to prevent seawater from entering and magnetorheological fluid from seeping out; the No. 2 sealing ring (9) performs secondary sealing to prevent seawater from entering and magnetorheological fluid from seeping out; the internal oil (16) of the underwater pressure balancing device is filled into the device through the oil filling port.

[0021] The working principle of a specific embodiment of an underwater pressure balancing device based on magnetorheological effect of the present invention is as follows: a rolling diaphragm (15) separates an upper shell (1) from a lower shell (5), and oil (16) is filled into the interior of the upper shell (1) to generate oil pressure p oil The middle shell (18) and the inner shell (19) divide the lower shell (5) into three layers: the outermost layer introduces seawater to generate external water pressure p sea ; The middle layer is equipped with a current controller (3); the innermost layer is equipped with a piston rod (8) and a magnetorheological system. Under the control of the current controller (3), the current-carrying wire (12) and the excitation coil (11) work together to generate a magnetic field of a certain intensity. The magnetorheological fluid (10) in the distributed magnetic field space undergoes a magnetorheological effect, and the viscosity increases with the increase of the magnetic field intensity, transforming from a Newtonian fluid to a Bingham fluid. After the device is immersed in water, as the depth increases, the piston rod (8) and the rolling diaphragm (15) move with the external water pressure p sea As the piston rod (8) moves upward, it is subjected to a magnetorheological damping force F in the opposite direction of the movement. MR (its value can be controlled by the magnetic field strength), the volume of the compressed oil (16) decreases rapidly, and the oil pressure p oil Rapidly increase, so that the upper and lower pressures of the rolling diaphragm (15) reach equilibrium. The force balance equation when the device reaches a stable state is:

[0022] p oil A e +m c g=p sea Ae+F MR

[0023] Where: p oil is the oil pressure in the pressure balancing device, A e is the effective contact area of ​​the diaphragm, m c is the mass of the diaphragm system, p sea is the seawater pressure; F MR is the magnetorheological damping force.

Claims

1. An underwater pressure balancing device based on magnetorheological effect, characterized in that: The device is composed of an upper shell (1), screws (2), a current controller (3), a protective cover (4), a lower shell (5), bolts (6), a No. 1 nut (7), a piston rod (8), a No. 2 sealing ring (9), a magnetorheological fluid (10), an excitation coil (11), an energized wire (12), a No. 1 sealing ring (13), a pressure plate (14), a rolling diaphragm (15), oil (16), a No. 2 nut (17), an intermediate shell (18), an inner shell (19), a No. 3 sealing ring (20), and a No. 4 sealing ring (21); a layer of rolling diaphragm (15) is sandwiched between the upper shell (1) and the lower shell (5), and is tightened by screws (2). The underwater pressure balancing device is fixedly connected to form the outer shell of the device; the interior of the underwater pressure balancing device is provided with a piston rod (8), an excitation coil (11), a magnetorheological fluid (10), a No. 2 sealing ring (9), a No. 3 sealing ring (20), an inner shell (19), a current controller (3), an intermediate shell (18), a No. 1 sealing ring (13), a rolling diaphragm (15), a pressure plate (14), a No. 4 sealing ring (21), a No. 2 nut (17) and oil (16) in sequence from the inside to the outside; the top of the piston rod (8) is provided with an inner shell (19), an intermediate shell (18), a No. 1 sealing ring (13), a rolling diaphragm (15), a pressure plate (14), a No. 4 sealing ring (21), a No. 2 nut (17) and oil (16) in sequence from the bottom to the top. No. 2 sealing ring (21), No. 2 nut (17), the piston rod (8) is threadedly connected with the No. 2 nut (17) by using a thread; two excitation coils (11) are installed in the middle of the piston rod (8) from bottom to top, and the excitation coils (11) are connected to the current controller (3) installed on the inner wall of the intermediate shell (18) through the current-carrying wire (12) built into the piston rod (8); the inner shell (19) is filled with magnetorheological fluid (10), the piston rod (8) first passes through the No. 2 sealing ring (9), and then the inner shell (19) and the lower shell (5) are threadedly matched by bolts (6) and No. 1 nuts (7); the lower shell (5) is provided with seawater inlet; the oil (16) inside the underwater pressure balancing device is filled into the device through the oil filling port; after the underwater pressure balancing device enters the water, as the depth increases, the piston rod (8) and the rolling diaphragm (15) move upward as the external water pressure continues to increase, and the piston rod (8) is subjected to a magnetorheological damping force opposite to the direction of movement, the volume of the compressed oil (16) decreases rapidly, and the oil pressure increases rapidly, so that the upper and lower pressures of the rolling diaphragm (15) are balanced; the current controller (3) and the current-carrying wire (12) are waterproofed; a protective cover (4) is installed outside the excitation coil (11) to isolate the magnetorheological fluid (10) in the inner shell (19).

2. An underwater pressure balancing device based on magnetorheological effect as claimed in claim 1, characterized in that: The fourth sealing ring (21) performs secondary sealing to prevent oil from entering.

3. The underwater pressure balancing device based on magnetorheological effect according to claim 1, characterized in that: The first sealing ring (13) performs secondary sealing to prevent seawater from entering.

4. The underwater pressure balancing device based on magnetorheological effect according to claim 1, characterized in that: The third sealing ring (20) performs secondary sealing to prevent seawater from entering and magnetorheological fluid from leaking out.

5. The underwater pressure balancing device based on magnetorheological effect according to claim 1, characterized in that: The second sealing ring (9) performs secondary sealing to prevent seawater from entering and magnetorheological fluid from leaking out.

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