阅读说明：本技术 一种封闭式往复驱动液态金属磁流体发电机 (Closed reciprocating drive liquid metal magnetohydrodynamic generator ) 是由 李建 沙次文 彭爱武 王�锋 刘保林 夏琦 赵凌志 刘艳娇 张庆贺 李然 于 2019-10-22 设计创作，主要内容包括：一种封闭式往复驱动液态金属磁流体发电机,包括双出轴液压缸(1)、磁流体发电通道(2)、连接软管(3)和磁体(4)。双出轴液压缸(1)平行布置于磁流体发电通道(2)的一侧,磁流体发电通道(2)水平居中布置,双出轴液压缸(1)两端的出液口通过连接软管(3)分别与磁流体发电通道(2)两端的接口连接,形成封闭管路。液态金属工质储存于双出轴液压缸(1)和上述的封闭管路中,并被双出轴液压缸(1)内部的活塞分隔。磁体(4)嵌套在磁流体发电通道(2)上。当本发明的封闭式往复驱动磁流体发电机工作时,外部的推力和拉力作用在双出轴液压缸(1)的活塞杆上,推动液态金属高速往复流过磁流体发电通道(2)产生电能。(A closed reciprocating drive liquid metal magnetohydrodynamic generator comprises a double-output-shaft hydraulic cylinder (1), a magnetohydrodynamic power generation channel (2), a connecting hose (3) and a magnet (4). The double-output-shaft hydraulic cylinder (1) is arranged on one side of the magnetofluid power generation channel (2) in parallel, the magnetofluid power generation channel (2) is horizontally arranged in the middle, and the liquid outlets at the two ends of the double-output-shaft hydraulic cylinder (1) are respectively connected with the interfaces at the two ends of the magnetofluid power generation channel (2) through the connecting hoses (3) to form a closed pipeline. The liquid metal working medium is stored in the double-output-shaft hydraulic cylinder (1) and the closed pipeline and is separated by the piston inside the double-output-shaft hydraulic cylinder (1). The magnet (4) is nested on the magnetofluid power generation channel (2). When the closed reciprocating drive magnetohydrodynamic generator works, external thrust and tension act on the piston rod of the double-output-shaft hydraulic cylinder (1) to push liquid metal to flow through the magnetohydrodynamic power generation channel (2) in a reciprocating mode at a high speed to generate electric energy.)

1. A closed reciprocating drive liquid metal magnetohydrodynamic generator is characterized in that: the magnetofluid generator comprises a double-output-shaft hydraulic cylinder (1), a magnetofluid power generation channel (2), a connecting hose (3) and a magnet (4); the double-output-shaft hydraulic cylinder (1) is arranged on one side of the magnetofluid power generation channel (2) in parallel, the magnetofluid power generation channel (2) is horizontally arranged in the middle, and two liquid outlets at two ends of the double-output-shaft hydraulic cylinder (1) are respectively connected with interfaces at two ends of the magnetofluid power generation channel (2) through connecting hoses (3) to form a closed pipeline; the liquid metal working medium is stored in the double-output-shaft hydraulic cylinder (1) and the closed pipeline and is separated by a piston inside the double-output-shaft hydraulic cylinder; the magnet (4) is nested on the magnetofluid power generation channel (2).

2. The enclosed reciprocating drive liquid metal mhd generator of claim 1, wherein: the diameters of piston rods on two sides of the piston of the double-output-shaft hydraulic cylinder (1) are the same, and the outflow and inflow of liquid metal of the oil cylinders on two sides of the double-output-shaft hydraulic cylinder are the same during reciprocating operation.

3. The enclosed reciprocating drive liquid metal mhd generator of claim 1, wherein: the piston rod of the double-output-shaft hydraulic cylinder (1) is connected with external driving equipment for providing reciprocating driving force, and the reciprocating thrust and the reciprocating pull of the external driving equipment act on one end of the piston rod of the double-output-shaft hydraulic cylinder (1); the reciprocating push force and the reciprocating pull force drive pistons in the double-output-shaft hydraulic cylinder (1) to reciprocate, so that liquid metal stored in the double-output-shaft hydraulic cylinder (1) and the closed pipeline is driven to pass through the magnetic fluid power generation channel (2) with an external magnetic field in a reciprocating mode at a high speed, and electric energy is generated under the action of the magnetic field of the magnet (4).

4. The enclosed reciprocating drive liquid metal mhd generator of claim 1, wherein: the magnetofluid power generation channels (2) and the magnets (4) are one or more groups.

Technical Field

The invention relates to a magnetohydrodynamic generator, in particular to a liquid metal magnetohydrodynamic generator.

Background

A Liquid Metal Magnetohydrodynamic (LMMHD) generator directly drives a power generation working medium such as Liquid Metal to reciprocate in a power generation channel by adopting an alternating external force such as a wave force through a hydraulic system, cuts magnetic lines of force and generates alternating electric energy.

Common liquid metal magnetohydrodynamic generators all adopt hydraulic oil as a driving working medium, and liquid metal as a power generation working medium. In order to avoid mixing of the driving working medium and the power generation working medium, a common method is to separate the driving working medium and the power generation working medium by adopting a container with variable volume, such as a corrugated pipe, a rubber bag or a piston cylinder; the bellows and the rubber bag have limited service life due to variable small volume and fatigue problem.

At present, common magnetofluid liquid metal magnetofluid generators all adopt a piston cylinder type structure, and a driving working medium and a power generation working medium are physically isolated by a piston. In the operation process of the magnetofluid generator, although the piston type liquid storage cylinder meets the requirement of larger variable volume, the gap between the piston and the piston cylinder is penetrated, so that the power generation working medium and the driving working medium are mixed, the performance of hydraulic oil and liquid metal is influenced, and the power generation effect is possibly influenced.

Disclosure of Invention

In order to overcome the defects of the existing liquid metal magnetohydrodynamic generator, the invention provides a closed reciprocating driving liquid metal magnetohydrodynamic generator.

The invention adopts the following technical scheme:

the invention relates to a closed reciprocating drive liquid metal magnetohydrodynamic generator, which comprises a double-output-shaft hydraulic cylinder, a magnetohydrodynamic power generation channel, a connecting hose and a magnet.

The double-output-shaft hydraulic cylinder mainly comprises an oil cylinder, a piston rod, a liquid outlet and other main components. The piston rods on both sides of the piston have the same diameter. When the double-output-shaft hydraulic cylinder operates in a reciprocating mode, the liquid metal outflow and inflow of the oil cylinders on the two sides of the double-output-shaft hydraulic cylinder are the same. Two ends of the oil cylinder of the double-output-shaft hydraulic cylinder are respectively provided with a liquid outlet.

The magnetohydrodynamic power generation channel is a rectangular flow structure made of insulating materials, and conductive electrodes are embedded in the inner walls of the magnetohydrodynamic power generation channel on the two horizontal sides perpendicular to the flow direction and used for leading out current.

The connection hose can adopt a hydraulic hose conforming to national standards, and two ends of the connection hose are respectively connected with the magnetofluid power generation channel and the liquid outlet of the double-output-shaft hydraulic cylinder.

The magnet adopts a permanent magnet, and a magnetic field in an air gap of the magnet vertically acts on the magnetofluid power generation channel.

The double-output-shaft hydraulic cylinder is horizontally arranged in the middle, the magnetofluid power generation channel is arranged on one side of the double-output-shaft hydraulic cylinder in parallel, and the interfaces at the two ends of the magnetofluid power generation channel are respectively connected with the two liquid outlets of the double-output-shaft hydraulic cylinder through connecting hoses and are communicated with each other to form a closed pipeline. And liquid metal is used as a power generation working medium and is stored in the double-output-shaft hydraulic cylinder and the closed pipeline. The liquid metal is separated by pistons inside the double-output-shaft hydraulic cylinder. The central part of the magnet is provided with a rectangular magnetic hole, the magnetofluid power generation channel passes through the magnetic hole of the magnet, and the magnetic field of the magnet vertically acts on the magnetofluid power generation channel.

When the magnetofluid generator works, external reciprocating thrust and pulling force act on one end of a piston rod of the double-output-shaft hydraulic cylinder. The reciprocating thrust and the reciprocating pull drive pistons in the double-output-shaft hydraulic cylinder to reciprocate, so that the liquid metal stored in the double-output-shaft hydraulic cylinder and the closed pipeline is driven to pass through the magnetic fluid power generation channel externally provided with the magnetic field in a reciprocating mode at a high speed, and electric energy is generated.

The magnetofluid power generation channels and the magnets can be one group or multiple groups, if multiple groups are adopted, the liquid outlets of the double-output-shaft hydraulic cylinder are connected with the multiple power generation channels after being divided by a pipeline with multiple branches. The plurality of power generation channels are connected in series through current, so that higher voltage is output.

In the conventional liquid metal magnetohydrodynamic generator, hydraulic oil and liquid metal are isolated by a piston, and because a gap exists between the inner wall of a hydraulic cylinder and the piston, complete sealing cannot be achieved, and a mixing phenomenon exists between the hydraulic oil and the liquid metal.

The closed reciprocating drive liquid metal magnetohydrodynamic generator seals liquid metal in an independent pipeline structure, and generates electricity through reciprocating thrust and pull acting on the piston rods of the double-output-shaft hydraulic cylinder. If an external hydraulic system is adopted to provide the pushing force and the pulling force, a piston rod of the external hydraulic system is connected with a piston rod on one side of the double-output-shaft hydraulic cylinder of the magnetofluid generator through a coupler, hydraulic oil in the external hydraulic system is completely not contacted with liquid metal in the magnetofluid generator, and the problem that the hydraulic oil and the liquid metal are easy to mix in the prior art is fundamentally solved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of a closed reciprocating-drive liquid metal magnetohydrodynamic generator of the present invention, in which: 1, a double-output-shaft hydraulic cylinder, 2, a magnetofluid power generation channel, 3, a connecting hose and 4 magnets;

fig. 2 shows an embodiment of the present invention connected with an external hydraulic drive system, in which 1 a double-output-shaft hydraulic cylinder, 2 a magnetohydrodynamic power generation channel, 3 a connecting hose, 4 magnets, 5 an external drive hydraulic cylinder, 6 a coupler, and 7 a reversing valve.

Detailed Description

The invention is further described below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of a closed reciprocating drive liquid metal mhd generator. Fig. 2 is a schematic diagram of the overall structure after the external hydraulic drive system is connected.

As shown in fig. 2, the embodiment of the enclosed reciprocating driven liquid metal mhd generator of the present invention comprises: the device comprises a double-output-shaft hydraulic cylinder 1, a magnetofluid power generation channel 2, a connecting hose 3, a magnet 4, an external driving hydraulic cylinder 5, a coupler 6 and a reversing valve 7. The double-output-shaft hydraulic cylinder 1 is arranged on one side of the magnetofluid power generation channel 2 in parallel, the magnetofluid power generation channel 2 is horizontally arranged in the middle, and the liquid outlets at two ends of the double-output-shaft hydraulic cylinder 1 are respectively connected with the interfaces at two ends of the magnetofluid power generation channel 2 through the connecting hoses 3 to form a closed pipeline. The liquid metal is stored in the double-output-shaft hydraulic cylinder 1 and the closed pipeline. The magnet 4 is nested on the mhd channel 2.

One end of a piston rod of the double-output-shaft hydraulic cylinder 1 is connected with a piston rod of an external driving hydraulic cylinder 5 through a coupler 6. The external driving hydraulic cylinder 5 pushes the piston rod and the piston of the double-output-shaft hydraulic cylinder 1 to reciprocate through the reversing valve 7 arranged on the closed pipeline between the double-output-shaft hydraulic cylinder 1 and the connecting hose 3, so that the double-output-shaft hydraulic cylinder 1 and the liquid metal in the closed pipeline are pushed to reciprocate at a high speed to flow through the power generation channel, and electric energy is generated under the action of the magnetic field of the magnet 4.