Corrugated hydraulic transmission device based on liquid alloy in high-temperature service environment and using method

Abstract

The invention discloses a corrugated hydraulic transmission device based on liquid alloy in a high-temperature service environment and a using method, and belongs to the field of high-temperature hydraulic transmission. The device comprises power sources A and B, corrugated drivers A and B, a high-low temperature pipeline, heat insulators A and B, a high-temperature liquid alloy actuator and a sensor accessory, wherein the paired power sources, heat insulators and corrugated drivers can improve the transmission stability. The power source drives a corrugated pipe of the corrugated driver to stretch out and draw back to excite low-temperature liquid metal in the pipe. Multiple heat insulation measures in the heat insulator separate the high-temperature side and the low-temperature side of the liquid metal, and it is guaranteed that the power source is not damaged by high temperature; a solid flange in the high-temperature liquid alloy actuator bears the pressure of the liquid metal and transmits the pressure to an output rod for external use; the fitting measures input and output signals of the transmission system, and high-precision displacement / force control of the actuator is ensured after the signals are closed. The bearing temperature is high, the structure is compact, the performance is reliable, the completely-sealed structure has the advantages of zero leakage, no need of lubrication, easy maintenance and the like, and the good popularization value is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of high-temperature hydraulic transmission, and relates to a liquid alloy transmission device and a usage method for a high-temperature service environment. Background Art

[0002] Hydraulic transmission technology is widely used in industry due to its advantages such as high precision and fast response. However, traditional water, silicone oil, and fluorine oil hydraulic devices will have problems such as a decrease in the viscosity of the hydraulic medium, gasification, precipitation and deterioration in a high-temperature environment, and there are also problems such as leakage, a cumbersome external water-cooling device, and complex maintenance. The vigorous development of technologies in various fields has put forward higher requirements for the transmission system. When a high-performance engine is working, the components of the transmission system often face extreme high-temperature environments. Research shows that the heat generated by a certain engine body raises the temperature of the fuel before entering the combustion chamber to 800 - 1000K through convective heat transfer. At the same time, the high-temperature radiation of the engine body greatly affects the design of the transmission system near the engine. Traditionally, a cumbersome cooling system and heat insulation system are often introduced to ensure the normal operation of the transmission system, but this significantly increases the complexity and maintenance cost of the system, and there may also be a risk of single-point failure, reducing the reliability and safety of the transmission system. Therefore, there is an urgent need to develop a compact and reliable transmission device that can serve in a high-temperature environment for a long time.

[0003] For high-temperature service conditions, an ideal and reliable transmission system should consider the following factors: 1. Stability and reliability; 2. Transmission accuracy; 3. No leakage and easy maintenance. Traditional pneumatic, electric, and hydraulic transmissions cannot meet the three requirements for various reasons. For example, the high compressibility leads to a high degree of nonlinearity and increased model uncertainty, which increases the difficulty of transmission; the magnets of electric transmissions rely on complex circulating cooling systems; hydraulic media will gasify and precipitate and deteriorate at high temperatures. The closed-loop hydraulic transmission technology does not use precision servo valves and has the characteristics of fast response, bendable pipelines, strong anti-pollution ability, high power, and low cost. At present, the application of its technology is limited to transmission occasions with "hydraulic oil", "water", "transmission fluid", etc. as hydraulic media under normal temperature conditions. There is no reported practical application research on closed-loop hydraulic transmission technology for high-temperature service environments in domestic and foreign literature. Further considering that liquid metals have advantages such as high temperature resistance, stable texture, and high bearing pressure compared with traditional hydraulic media, therefore, a new idea should be provided from a perspective different from traditional closed-loop hydraulic transmission technology to develop a hydraulic transmission device, change the pattern of application limitations of hydraulic transmission technology in high-temperature environments, and provide a new solution for the design of high-temperature service transmission systems. Summary of the Invention

[0004] In order to solve the problem that traditional transmission technologies in high-temperature service environments are too complex or even inapplicable, the present invention provides a compact and reliable transmission device that can serve in a high-temperature environment for a long time without using complex heat insulation coatings and cooling devices.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A corrugated hydraulic transmission device based on liquid alloy in a high-temperature service environment, the corrugated hydraulic transmission device comprising: power source 1 of type A and power source 11 of type B, corrugated driver 2 of type A and corrugated driver 10 of type B, heat insulator 4 of type A and heat insulator 8 of type B, first and second low-temperature pipes 3, 9, first and second high-temperature pipes 5, 7, and high-temperature liquid alloy actuator 6. The high-temperature liquid alloy actuator 6 is a key component. On its left side, the first high-temperature pipe 5, heat insulator 4 of type A, first low-temperature pipe 3, corrugated driver 2 of type A, and power source 1 of type A are connected in series in sequence. On its right side, the second high-temperature pipe 7, heat insulator 8 of type B, second low-temperature pipe 9, corrugated driver 10 of type B, and power source 11 of type B are connected in series in sequence. The system layout is basically symmetrical, that is, except for the first and second high-temperature pipes 5, 7 on both sides of the high-temperature liquid alloy actuator 6, other components are of symmetrical structure. The label letters A and B represent a group of parts with the same structure. For example, power source 1 of type A and power source 9 of type B have the same structure. Therefore, each component will be described in terms of group A below. Power source 1 of type A and power source 11 of type B moving in the reverse direction push and pull together to jointly stimulate the liquid metal inside the pipe to transfer the pressure to the output rod 67 of the high-temperature liquid alloy actuator 6, and the high-temperature and low-temperature liquid metals are separated to protect the system power source. Specifically:

[0007] The power source 1 of type A is located at the leftmost end of the high-temperature liquid alloy actuator 6. Its form can be a linear motion mechanism or a rotary mechanism. The right side of the power source 1 of type A is threadedly connected to the driver connection disk 23 of the corrugated driver 2 of type A to complete the input of system energy.

[0008] The corrugated driver 2 of type A includes an input displacement measurement plate 21, a three-way joint 22, a driver connection disk 23, a bellows unit 100, a driver guide rod 24, and a driver fixing seat 25. Specifically: The left side of the bellows unit 100 is welded to the driver connection disk 23 as a whole to ensure the pipeline sealing performance in a high-temperature environment. Four driver guide rods 24 are horizontally installed on the connection disk 106 of the bellows unit 100 through bolts. When the power source 1 of type A expands and contracts, it drives the bellows main body 102 of the bellows unit 100 to expand and contract, and the expansion and contraction direction is horizontally restricted by the guide rod 24. The first bottom of the three-way joint 22 is threadedly connected to the liquid inlet and outlet hole 103 of the bellows unit 100. The second horizontal joint of the three-way joint 22 is connected to the first low-temperature pipe 3. A pressure sensor fitting and the like are installed at the third top joint to obtain the pressure inside the pipeline of the corrugated driver 2 of type A. The driver fixing seat 25 is connected to the connection disk 106 of the bellows unit 100. The right side of the input displacement measurement plate 21 is connected to the left side of the driver connection disk 23 through bolts.

[0009] Furthermore, the bellows unit 100 includes a bellows left flange 101, a bellows main body 102 in the middle, a connection plate 106, and liquid inlet and outlet holes 103, fixing holes 104, and positioning holes 105 formed in the connection plate 106. Specifically as follows: The left side of the bellows main body 102 is welded to the bellows left flange 101, and the bellows left flange 101 is welded to the driver connection plate 23 or the solid flange 63. The liquid metal flows into the pipeline of the bellows main body 102 through the middle hole of the bellows left flange 101; the right side of the bellows main body 102 is welded with a connection plate 106; A plurality of fixing holes 104 and a positioning hole 105 are axially formed in the connection plate 106, and a liquid inlet and outlet hole 103 is radially formed on the side surface of the connection plate 106 and communicated with the inside of the bellows main body 102; The driver fixing seat 25 is composed of a longitudinal plate and a horizontal plate. The longitudinal plate is provided with several holes in the horizontal direction, corresponding to the fixing holes 104 and the positioning hole 105 of the connection plate 106, and is connected by bolts to support the No. A bellows driver 2.

[0010] The No. A heat insulator 4 includes a heat dissipation fin 41, a heat insulation unit 47, and a sleeve 46 on the rightmost side from left to right. The pipelines of the heat dissipation fin 41 and the sleeve 46 are both machined with connecting threads having the same inner diameter. After being thread-connected, they are further sealed by electric welding. The heat insulation unit 47 is provided with a heat insulation slider 44 having an inner diameter similar to that of the sleeve 46. The heat dissipation fin 41 is connected to the sleeve 46 through the heat insulation unit 47. The heat insulation slider 44 isolates most of the heat of the high-temperature liquid metal on the right side, and the liquid heat flowing into the first low-temperature pipeline 3 through the fitting gap between the heat insulation slider 44 and the pipeline is dissipated by the heat dissipation fin 41.

[0011] Furthermore, the heat insulation unit 47 includes a left clamp 42, a right clamp 45, and a heat insulation gasket 43. The left clamp 42 is provided with several holes in the horizontal direction; the right clamp 45 is provided with the same holes as the left clamp 42 in the horizontal direction; A heat insulation gasket 43 is provided between the left clamp 42 and the right clamp 45 to further hinder the conduction of heat, and the left clamp 42 and the right clamp 45 use bolts to fix the position of the heat insulation gasket 43. Protrusions for restricting the displacement of the heat insulation slider 44 are made on the right part of the heat dissipation fin 41 and the left part of the sleeve 46.

[0012] The high-temperature liquid alloy actuator 6 adopts two symmetrically installed bellows units 100, including a feedback displacement measurement plate 61, a left base 62, a solid flange 63, a right base 64, two three-way joints 65 on the left and right sides, a force transmission rod 66, a force transmission rod 67, a motion guiding rod 68, and two bellows units 100. A motion guiding rod 68 is provided on the outer periphery of the left bellows unit 100, and a force transmission rod 66 is provided on the outer periphery of the right bellows unit 100. Specifically: The left flange 101 of the bellows of the bellows unit 100 is welded to the solid flange 63, and the solid flange 63 separates the liquid metal in the pipelines of the two bellows units 100. The two bellows units 100 are respectively connected to the first and second high-temperature pipelines 5 and 7 through the three-way joints 65; the two bellows units 100 are supported and fixed by the left base 62 and the right base 64, and the structures of the two bases are exactly the same, and guiding holes for the force transmission rod 66 and guiding holes for the motion guiding rod 68 are opened thereon. The solid flange 63 is also provided with guiding holes for the force transmission rod 66 and the motion guiding rod 68 in the horizontal direction. External threads are turned on the left side of the force transmission rod 66 and the right side of the motion guiding rod 68, and they are connected to the solid flange 63 through bolts. The right side surface of the feedback displacement measurement plate 61 is welded to the leftmost ends of the four motion guiding rods 68 to form an integral body. When liquid metal flows into and out of the high-temperature liquid alloy actuator 6, causing the bellows unit 100 to expand and contract, the solid flange 63 generates the same displacement. This displacement change amount is synchronized to the feedback displacement measurement plate 61 on the one hand, and transmitted to the output rod 67 on the other hand, completing the hydraulic transmission process of the device.

[0013] Furthermore, both the left base 62 and the right base 64 are composed of a longitudinal plate and a horizontal plate, and the longitudinal plate is provided with guiding holes and mounting holes in the horizontal direction. For the two three-way joints 65 of the high-temperature liquid alloy actuator 6, specifically: The first joint of the left three-way joint 65 is connected to the first high-temperature pipeline 5, the second joint is threadedly connected to the liquid inlet and outlet hole 103 of the left bellows unit 100, and pressure and other sensor fittings are installed at the third joint to obtain the internal pressure of the left bellows unit 100. The first joint of the right three-way joint 65 is connected to the second high-temperature pipeline 7, the second joint is threadedly connected to the liquid inlet and outlet hole 103 of the right bellows unit 100, and pressure and other sensor fittings are installed at the third joint to obtain the internal pressure of the right bellows unit 100.

[0014] Furthermore, the first high-temperature pipeline 5 is connected to the high-temperature liquid alloy actuator 6 and the A-type heat insulator 4, and the first low-temperature pipeline 3 is connected to the A-type heat insulator 4 and the A-type bellows driver 2. When necessary, the connections between the pipelines and the components can all be strengthened by welding. The second high-temperature pipeline 7 is connected to the high-temperature liquid alloy actuator 6 and the B-type heat insulator 8, and the second low-temperature pipeline 9 is connected to the B-type heat insulator 8 and the B-type bellows driver 10. When necessary, the connections between the pipelines and the components can all be strengthened by welding.

[0015] Further, displacement sensors can be installed on the input displacement measurement plate 21 and the feedback displacement measurement plate 61 of the corrugated hydraulic transmission device to obtain the actual output displacement of the No. A and No. B corrugated drivers 2 and 10 and the high-temperature liquid alloy actuator 6.

[0016] Further, pressure sensors can be installed on all three-way joints of the corrugated hydraulic transmission device to obtain the internal pipe pressure of the No. A and No. B corrugated drivers 2 and 10 and the high-temperature liquid alloy actuator 6.

[0017] Further, the corrugated hydraulic transmission device further includes a precise control process for the high-temperature liquid alloy actuator 6. By combining the telescopic amount and the internal pipe pressure of all bellows bodies 102, a precise displacement / force closed-loop control can be formed.

[0018] A method for using a corrugated hydraulic transmission device based on liquid alloy in a high-temperature service environment. By combining the physical quantity data inside all bellows units, changing the magnitude of the system energy input, and completing the regulation of the output displacement / force of the device, a reliable transmission function that can serve in a high-temperature environment for a long time without using complex heat insulation coatings and cooling devices is realized, including the following steps:

[0019] The first step is to assemble a corrugated hydraulic transmission device based on liquid alloy that can serve in a high-temperature environment:

[0020] Connect the No. A power source 1, the No. A corrugated driver 2, the first low-temperature pipe 3, and the No. A heat insulator 4 in series from left to right to form the first branch. Connect the No. B heat insulator 8, the second low-temperature pipe 9, the No. B corrugated driver 10, and the No. B power source 11 in series to form the second branch. After installing the position of the high-temperature liquid alloy actuator 6 according to actual requirements, design a suitable first high-temperature pipe 5 to connect the first branch and one end of the high-temperature liquid alloy actuator 6. Similarly, connect the second high-temperature pipe 7 to connect the second branch and the other end of the high-temperature liquid alloy actuator 6. Finally, install displacement and pressure sensors on the No. A and No. B corrugated drivers 2 and 10 and the high-temperature liquid alloy actuator 6. At this time, the hardware part of the transmission device has been assembled. When necessary, use electric welding to strengthen the connection and sealing of each part. Taking the rightward push (reciprocating motion) of the No. A power source 1 as an example, the specific implementation process of liquid metal transmission is described.

[0021] The second step, at time T 1 At this moment, the horizontal movement of the No. A power source 1 drives the driver connection disk 23 and the bellows unit 100 of the No. A corrugated driver 2. The low-temperature liquid metal inside the pipe is squeezed out from the liquid inlet and outlet hole 103. At this time, the bellows body 102 is compressed by the same distance, and its moving direction is horizontally restricted by the driver guide rod 24.

[0022] The third step, at time T2 At this moment, the liquid metal flowing out of the corrugated driver 2 of No. A pushes the heat insulation slider 44 inside the heat insulator 4 of No. A to move to the right. The moving range of the slider is restricted by the heat dissipation fins 41 and the protrusions inside the sleeve 46. The heat insulation slider 44 and the heat insulation gasket 43 isolate the air heat radiation at the high-temperature end on the right side and the liquid metal heat conduction process. At this time, the temperature inside the first low-temperature pipeline 3 is much lower than that inside the first high-temperature pipeline 5, and the heat insulator 4 of No. A completes the heat insulation function.

[0023] The fourth step, T 3 At this moment, the liquid metal inside the first high-temperature pipeline 5 is pressed into the high-temperature liquid alloy actuator 6 by the heat insulation slider 44. The two bellows units 100 of the actuator are fixed on the left base 62 and the right base 64 to keep the total length constant. Therefore, the liquid metal entering the actuator from the left pushes the solid flange 63 to move to the right. The bellows unit on the left elongates, and the bellows unit on the right compresses. The solid flange 63 drives the feedback displacement measuring plate 61 and the output rod 67 to move to the right together. The displacement sensor installed on the feedback displacement measuring plate 61 can measure the moving amount of the output rod 67. This moving amount and the expected moving amount form a closed-loop control system. When the output rod 67 reaches the specified position, the power sources 1 and 11 of No. A and No. B will remain stationary at the current position. When the position of the output rod 67 deviates, the two power sources will finely adjust the output energy to achieve precise control of the displacement of the output rod 67. Similarly, the pressure inside the pipe of the high-temperature liquid alloy actuator 6 and the expected pressure of the system form a closed loop to achieve precise control of the force of the output rod 67.

[0024] The present invention provides a compact and reliable transmission device including bellows for carrying telescopic motion, a corrugated driver, and a high-temperature liquid alloy actuator, having the following beneficial effects:

[0025] (1) High load-bearing temperature. The boiling point of liquid metal is much higher than the temperatures in most application scenarios, and stable and reliable transmission can still be achieved in extreme high-temperature environments;

[0026] (2) Compact, reliable, and portable. The transmission device of the invention adopts a linear or rotary power source, so the power source is very extensive. In addition, there is no need for a separate hydraulic station, nor complex valve control components, so the transmission device is more compact and reliable;

[0027] (3) Zero leakage. Traditional hydraulic transmission cannot avoid accidents such as static seal failure at the piston rod and other places, while the bellows carry the telescopic motion of the liquid inside the system, and the inside of the pipeline is completely enclosed, thus completely avoiding the leakage problem;

[0028] (4) No lubrication is required. The output of the traditional hydraulic transmission system needs to lubricate the piston rod, and the lubrication performance affects the actuation performance of the system. However, the solid flange of the high-temperature liquid alloy actuator transmits the system output, and its actuation performance is independent of the viscosity or lubrication properties of the liquid.

[0029] (5) High system accuracy. The output displacement / force of the closed-loop actuator can accurately control the output energy of the power source.

[0030] (6) Low noise and easy to maintain. The invented transmission device does not require an additional hydraulic source, there is no noise caused by the high-speed rotation of the pump during operation, and the liquid metal has a stable texture, reducing the difficulty of system maintenance. Description of the Drawings

[0031] Figure 1 It is a structural diagram of a corrugated hydraulic transmission device based on liquid alloy in a high-temperature service environment.

[0032] Figure 2 It is an axonometric view of the bellows unit 100; a total of four bellows units as shown are used in the entire transmission device. Figure 2 are shown.

[0033] Figure 3 It is the right view of the bellows of the transmission device.

[0034] Figure 4 It is an axonometric view of the corrugated actuator.

[0035] Figure 5 It is an axonometric view of the heat insulator.

[0036] Figure 6 It is an axonometric view of the high-temperature liquid alloy actuator.

[0037] In the figure: Power source No. 1A; Corrugated actuator No. 2A; First low-temperature pipeline No. 3; Heat insulator No. 4A; First high-temperature pipeline No. 5; High-temperature liquid alloy actuator No. 6; Second high-temperature pipeline No. 7; Heat insulator No. 8B; Second low-temperature pipeline No. 9; Corrugated actuator No. 10B; Power source No. 11B.

[0038] 100 Bellows unit; 101 Left flange of the bellows; 102 Bellows body; 103 Liquid inlet and outlet hole; 104 Fixed hole; 105 Positioning hole; 106 Connection plate.

[0039] 21 Input displacement measurement plate; 22 Three-way joint; 23 Driver connection plate; 24 Driver guide rod; 25 Driver fixed seat.

[0040] 41 Heat dissipation fins; 42 Left clamp; 43 Heat insulation gasket; 44 Heat insulation slider; 45 Right clamp; 46 Sleeve; 47 Heat insulation unit.

[0041] 61 Feedback displacement measurement board; 62 Left base; 63 Solid flange; 64 Right base; 65 Three-way joint; 66 Force transmission rod; 67 Output rod; 68 Movement guiding rod;

[0042] It should be noted that; Figure 1 A pair of power sources, a pair of corrugated drivers, and a pair of heat insulators are adopted. Their structures are completely the same. Therefore, the internal structure is illustrated by taking one of them as an example in the attached drawings. Specific implementation manners

[0043] The preferred implementation manners of the present invention are described in detail below according to the technical solutions and the order of the attached drawings. Those skilled in the art should understand that these implementation manners only represent the transmission and control principles of the present invention and do not limit the protection scope of the present invention. Those skilled in the art can make appropriate adjustments with reference to the present invention for application in different high-temperature occasions. It should be noted that in the description of the present invention, the screws can be appropriately increased or decreased according to actual needs, and the connection parts without specified mating relationships can adopt connection methods such as electric welding or bolts according to actual requirements.

[0044] As shown in the attached Figures 1 to 6 drawings, the present invention designs a bellows unit 100 ( Figure 2 ), and based on this, develops a No. A (B) corrugated driver 2 (10) ( Figure 4 ) and a high-temperature liquid alloy actuator ( Figure 6 ), which together with the No. A (B) heat insulator 4 (8) ( Figure 5 ) and the No. A (B) power source 1 (11) form a compact and reliable transmission device as shown in Figure 1 the drawings. This device has the ability to serve in a high-temperature environment for a long time.

[0045] As shown in Figure (1), power source 1 of type A and power source 9 of type B provide power for the entire transmission device. Taking the rightward push of power source 1 of type A as an example, the specific method of liquid metal transmission is described. The liquid metal is filled in the first low-temperature pipeline 3 and the first high-temperature pipeline 5. Usually, the actuator is installed in a high-temperature environment affected by heat radiation. Therefore, there is high-temperature liquid metal in pipeline 5. Since heat insulator 4 of type A isolates the high-temperature environment on the right side, the liquid metal in the first low-temperature pipeline 3 is in a low-temperature state, and its function is to protect power source 1 of type A from high temperature. Power source 1 of type A compresses the bellows unit of corrugated driver 2, causing the internal low-temperature liquid metal to flow towards three-way joint 22, and then driving the heat insulation slider 44 inside heat insulator 4 of type A to move to the right. The solid flange 63 of high-temperature liquid alloy actuator 6 connects two symmetrically installed bellows units, and their connection plates 106 are both fixed to the left (right) base 62 (64) by bolts. Therefore, the high-temperature liquid metal flowing out of heat insulator 4 of type A will push solid flange 63 to move to the right, and the movement is strictly restricted to the horizontal direction by movement guiding rod 68 and force transmission rod 66. At the same time, feedback displacement measuring plate 61 moves to the right, force transmission rod 66 transmits the movement of the flange to output rod 67, the high-temperature liquid metal in the right-side bellows unit is squeezed and flows into heat insulator 8 of type B, and bellows driver 10 of type B elongates under the liquid pressure. In addition, in the design of the transmission device:

[0046] Preferably, two power sources are selected to improve the load-carrying capacity of the system, and the power output directions of the two are opposite.

[0047] Preferably, force transmission rod 66 is made of wear-resistant and high-strength metal materials such as C55E, C50E, tungsten steel, etc. In this embodiment, C55E is selected.

[0048] Preferably, driver guiding rod 24 and movement guiding rod 68 are made of wear-resistant metal materials. In this embodiment, C55E is selected.

[0049] Preferably, the two bellows units of high-temperature liquid alloy actuator 6 and solid flange 63 are connected by electric welding.

[0050] Preferably, bellows unit 100 and its connectors are made of high-temperature resistant and low-expansion alloy, and the alloy has good welding performance. In this embodiment, 4J42 expansion alloy is selected.

[0051] Preferably, the liquid alloy is made of low-melting-point alloys such as bismuth-based and indium-based alloys. In this embodiment, gallium-based alloy is selected.

[0052] Preferably, a pressure sensor is installed at three-way joint 65 to monitor the internal pressure of the actuator pipeline.

[0053] As shown in Figures (2) and (3), the bellows unit 100 includes the following structures: a bellows body 102 that shortens under compression and elongates under tension; a left flange 101 of the bellows for connecting to external parts, such as connecting to a solid flange 63 of an external drive connection plate 23 and a high-temperature liquid alloy actuator 6; a liquid inlet / outlet hole 103 having an inner diameter consistent with the outer diameter of a tee joint 65; and a fixing hole 104 for fixing the bellows unit or guiding the movement of the bellows body 102. In addition, to ensure the sealing and convenient installation of the bellows unit 100:

[0054] Preferably, a positioning hole 105 is designed.

[0055] Preferably, the bellows body 102 and the left flange 101 of the bellows are connected by electric welding.

[0056] As shown in Figure (4), the right end of the bellows unit of the No. A bellows actuator 2 is connected to an actuator fixing seat 25 by two bolts, and the positioning hole 105 can be used for guiding during installation. An input displacement measuring plate 21 is installed on the drive connection plate 23 on the left side of the bellows unit. Four drive guide rods 24 penetrate the entire bellows actuator, and the ends of the guide rods are fixed to the actuator fixing seat 25.

[0057] In addition, to ensure the sealing and convenient installation of the bellows:

[0058] Preferably, the drive connection plate 23 and the left flange 101 of the bellows are connected by electric welding.

[0059] As shown in Figure (5), the No. A heat insulator 4 includes the following structures: heat dissipation fins 41, a heat insulation unit 47, and a sleeve 46. An insulation slider 44 with a size similar to that of a pipeline is provided inside the heat insulation unit 47, a heat insulation gasket 43 is provided in the middle, and the left clamp 42 and the right clamp 45 are connected by bolts to fix the position of the heat insulation gasket 43. The moving liquid metal pushes the insulation slider 44 to move back and forth, and the movement range is limited by the heat dissipation fins 41 and the protrusions inside the sleeve 46. This range is slightly larger than the movement range of the high-temperature liquid alloy actuator 6 to ensure that the internal pipeline pressure of the first low-temperature pipeline 3 and the No. A bellows actuator 2 does not overload. The high-temperature liquid metal in a moving state transfers heat to the sleeve 46 and is then isolated by the heat insulation unit 47. Most of the heat cannot be transferred to the heat dissipation fins 41, and very little heat is conducted to the left and dissipated through the fins. Even during long-term operation, the No. A power source 1 can be prevented from being damaged by high temperature.

[0060] As shown in Figure (6), the liquid metal in the high-temperature liquid alloy actuator 6 drives the solid flange 63 to move back and forth. The direction of this movement is horizontally restricted by a movement guide rod 68, and the displacement amount of the movement is responded to on a feedback displacement measuring plate 61. A force transmission rod 66 is bolted to the solid flange 63, and finally all the energy of the solid flange 63 is transmitted to an output rod 67.

[0061] Combined with the above-mentioned attached drawings, the control system circuit of the hydraulic transmission device is a closed-loop displacement / force control. The system feedback signals are the pressure sensor signals installed at the three-way joint 65 and the displacement signals on the feedback displacement measurement board 61, and the input signals are the displacement and force signals that the system expects to apply to the output rod 67. After introducing the above signals, the system can adjust the energy input of the power source 1 of type A or the power source 11 of type B according to the high-precision digital control algorithm, such as the displacement input of the linear electric cylinder, so as to achieve the precise displacement / force control of the output rod 67.

[0062] The above-described embodiments only represent the implementation manners of the present invention, but should not be construed as limiting the scope of the present invention. It should be noted that for those skilled in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A corrugated hydraulic transmission device based on liquid alloy in high temperature service environment, characterized in that: The bellows type hydraulic transmission device comprises: a power source A (1) and a power source B (11), a bellows driver A (2) and a bellows driver B (10), a heat insulator A (4) and a heat insulator B (8), a first and a second low temperature pipeline (3) and (9), a first and a second high temperature pipeline (5) and (7), and a high temperature liquid alloy actuator (6); the left side of the high temperature liquid alloy actuator (6) is connected in series with the first high temperature pipeline (5), the heat insulator A (4), the first low temperature pipeline (7), and the second high temperature pipeline (8). A high-temperature pipe (3), a No. A corrugated driver (2) and a No. A power source (1), and a second high-temperature pipe (7), a No. B heat insulator (8), a second low-temperature pipe (9), a No. B corrugated driver (10) and a No. B power source (11) are sequentially connected in series on the right side; the No. A power source (1) and the No. B power source (11) moving in the opposite direction push and pull together to stimulate the liquid metal to transmit pressure to the output rod (67) of the high-temperature liquid alloy actuator (6), and the liquid metal is isolated to protect the system power source.

2. According to claim 1, a corrugated hydraulic transmission device based on liquid alloy in a high temperature service environment is characterized in that: The system layout of the bellows-type hydraulic transmission device is basically symmetrical, that is, except for the first and second high-temperature pipes (5) and (7) on the left and right sides of the high-temperature liquid alloy actuator (6), the other components are symmetrical structures; the first high-temperature pipe (5) connects the high-temperature liquid alloy actuator (6) and the A-number heat insulator (4), and the first low-temperature pipe (3) connects the A-number heat insulator (4) and the A-number bellows driver (2); the second high-temperature pipe (7) connects the high-temperature liquid alloy actuator (6) and the B-number heat insulator (8), and the second low-temperature pipe (9) connects the B-number heat insulator (8) and the B-number bellows driver (10).

3. According to claim 1, a corrugated hydraulic transmission device based on liquid alloy in a high temperature service environment is characterized in that: The letters A and B represent a group of parts with the same structure, and for this purpose, the structure of group A is described, specifically: The power source A (1) is located at the leftmost end of the high-temperature liquid alloy actuator (6), and its right side is connected to the driver connection plate (23) of the corrugated driver A (2) to complete the input of system energy; The A-numbered corrugated driver (2) comprises an input displacement measuring plate (21), a three-way joint (22), a driver connecting plate (23), a bellows unit (100), a driver guide rod (24), and a driver fixing seat (25); specifically, the left side of the bellows unit (100) is connected to the driver connecting plate (23), the driver guide rod (24) is horizontally mounted on the connecting plate (106) of the bellows unit (100), and when the A-numbered power source (1) is extended or retracted, the bellows body (102) of the bellows unit (100) is driven to extend or retract. The expansion and contraction direction is horizontally constrained by the guide rod (24); the first bottom joint of the three-way joint (22) is connected to the liquid inlet and outlet hole (103) of the bellows unit (100), the second horizontal joint is connected to the first low-temperature pipeline (3), and the sensor accessories are installed at the third top joint to obtain the pressure in the pipeline of the A-number bellows driver (2); the driver fixing seat (25) is connected to the connection plate (106) of the bellows unit (100); the right side of the input displacement measurement plate (21) is connected to the left side of the driver connection plate (23); The A-number heat insulator (4) comprises, from left to right, a heat dissipation fin (41), a heat insulation unit (47), and a sleeve (46) on the far right; a heat insulation slider (44) having an inner diameter close to that of the sleeve (46) is provided in the heat insulation unit (47); the heat dissipation fin (41) is connected to the sleeve (46) via the heat insulation unit (47); The high-temperature liquid alloy actuator (6) adopts two symmetrically installed bellows units (100), including a feedback displacement measurement plate (61), a left base (62), a solid flange (63), a right base (64), two three-way joints (65) on the left and right sides, a force transmission rod (66), an output rod (67), a motion guide rod (68) and two bellows units (100), wherein the motion guide rod (68) is arranged on the outer periphery of the left bellows unit (100), and the force transmission rod (66) is arranged on the outer periphery of the right bellows unit (100); specifically: the bellows of the bellows unit (100) The left flange (101) is connected to the solid flange (63), and the solid flange (63) separates the liquid metal in the pipes of the two bellows units (100); the two bellows units (100) are respectively connected to the first and second high-temperature pipes (5) and (7) through three-way joints (65); the two bellows units (100) are supported and fixed by a left base (62) and a right base (64), and the two bases are provided with guide holes for a force transmission rod (66) and a guide hole for a motion guide rod (68); the solid flange (63) is also provided with guide holes for the force transmission rod (66) and the motion guide rod (68) in the horizontal direction.

4. The corrugated hydraulic transmission device based on liquid alloy in high temperature service environment according to claim 3, characterized in that: The bellows unit (100) comprises a bellows left flange (101), a bellows body (102) in the middle, a connection plate (106), and a liquid inlet and outlet hole (103), a fixing hole (104), and a positioning hole (105) provided on the connection plate (106); the details are as follows: The left side of the bellows body (102) is connected to the left side flange (101) of the bellows, and the left side flange (101) of the bellows is connected to the driver connecting plate (23) or the solid flange (63), and the liquid metal flows into the pipeline of the bellows body (102) through the middle hole of the left side flange (101) of the bellows; the right side of the bellows body (102) is connected to the connecting plate (106); a plurality of fixing holes (104) and a positioning hole (105) are opened in the axial direction on the connecting plate (106), and a liquid inlet and outlet hole (103) is opened in the radial direction on the side of the connecting plate (106) to communicate with the inside of the bellows body (102); the driver fixing seat (25) is composed of a longitudinal plate and a horizontal plate, wherein the longitudinal plate has a plurality of holes opened in the horizontal direction, corresponding to the fixing holes (104) and the positioning holes (105) of the connecting plate (106), and is used to support the A-size bellows driver (2).

5. The corrugated hydraulic transmission device based on liquid alloy in high temperature service environment according to claim 3, characterized in that: The A-type power source (1) is in the form of a linear motion mechanism or a rotary mechanism; the pipe and sleeve (46) of the heat dissipation fin (41) are both machined with connecting threads of the same inner diameter, which are further sealed by electric welding after the threaded connection; the left side of the force transmission rod (66) and the right side of the motion guide rod (68) are both machined with external threads and connected to the solid flange (63).

6. The corrugated hydraulic transmission device based on liquid alloy in high temperature service environment according to claim 3, characterized in that: The heat insulation unit (47) comprises a left clamp (42), a right clamp (45), and a heat insulation gasket (43); the left clamp (42) has a plurality of holes in the horizontal direction; the right clamp (45) has the same holes as the left clamp (42) in the horizontal direction; a heat insulation gasket (43) is arranged between the left clamp (42) and the right clamp (45), and the position of the heat insulation gasket (43) is fixed between the left clamp (42) and the right clamp (45) by bolts; the right part of the heat dissipation fin (41) and the left part of the sleeve (46) are both provided with protrusions for limiting the displacement of the heat insulation slider (44).

7. A corrugated hydraulic transmission device based on liquid alloy in a high temperature service environment according to claim 3, characterized in that: The left base (62) and the right base (64) are both composed of a longitudinal plate and a horizontal plate, wherein the longitudinal plate is provided with a guide hole and a mounting hole in the horizontal direction; the two three-way joints (65) of the high-temperature liquid alloy actuator (6) are specifically: the first joint of the left three-way joint (65) is connected to the first high-temperature pipeline (5), the second joint is connected to the liquid inlet and outlet hole (103) of the left bellows unit (100) by threading, and the sensor accessories are installed at the third joint to obtain the pressure inside the tube of the left bellows unit (100); the first joint of the right three-way joint (65) is connected to the second high-temperature pipeline (7), the second joint is connected to the liquid inlet and outlet hole (103) of the right bellows unit (100) by threading, and the sensor accessories are installed at the third joint to obtain the pressure inside the tube of the right bellows unit (100).

8. A corrugated hydraulic transmission device based on liquid alloy in a high temperature service environment as claimed in claim 3, characterized in that: The input displacement measuring plate (21) and the feedback displacement measuring plate (61) of the corrugated hydraulic transmission device can both be equipped with displacement sensors to obtain the actual output displacement of the A and B corrugated drivers (2), (10) and the high-temperature liquid alloy actuator (6).

9. A corrugated hydraulic transmission method based on liquid alloy in a high-temperature service environment, characterized in that: The corrugated hydraulic transmission method is implemented based on the corrugated hydraulic transmission device described in any one of claims 1 to 8, and the output displacement and force of the transmission device are regulated by changing the energy input size. The following steps are involved: The first step is to assemble a corrugated hydraulic transmission device based on liquid alloy that can serve in high-temperature environments: From left to right, the power source A (1), the corrugated driver A (2), the first low-temperature pipeline (3) and the heat insulator A (4) are connected in series in sequence to form a first branch; the heat insulator B (8), the second low-temperature pipeline (9), the corrugated driver B (10) and the power source B (11) are connected in series in sequence to form a second branch; after the position of the high-temperature liquid alloy actuator (6) is installed according to actual needs, a suitable first high-temperature pipeline (5) is designed to connect the first branch and one end of the high-temperature liquid alloy actuator (6), and similarly, the second high-temperature pipeline (7) is connected to the second branch and the other end of the high-temperature liquid alloy actuator (6); finally, displacement and pressure sensors are installed on the corrugated drivers A and B (2), (10) and the high-temperature liquid alloy actuator (6), and the specific implementation process of the liquid metal transmission is explained by pushing the power source A (1) to the right, wherein the power source A (1) and the power source B (11) can reciprocate; In the second step, at time T1, the power source (1) No. A moves horizontally to drive the driver connecting plate (23) and the bellows unit (100) of the bellows driver (2) No. A, and the low-temperature liquid metal in the tube is squeezed to flow out from the liquid inlet and outlet hole (103). At this time, the bellows body (102) is compressed by the same distance, and its moving direction is horizontally constrained by the driver guide rod (24); In the third step, at time T2, the liquid metal flowing out of the corrugated driver No. A (2) pushes the heat-insulating slider (44) in the heat insulator No. A (4) to move to the right, and the movement range of the slider is limited by the heat dissipation fins (41) and the internal protrusions of the sleeve (46); the heat-insulating slider (44) and the heat-insulating gasket (43) isolate the air heat radiation at the right high-temperature end and the liquid metal heat conduction process. At this time, the internal temperature of the first low-temperature pipeline (3) is much lower than that of the first high-temperature pipeline (5), and the heat insulator No. A (4) completes the heat insulation function; In the fourth step, at time T3, the liquid metal inside the first high-temperature pipe (5) is pressed into the high-temperature liquid alloy actuator (6) by the heat-insulating slider (44). The two bellows units (100) of the actuator are fixed on the left base (62) and the right base (64) to keep the total length constant. For this purpose, the liquid metal entering the actuator from the left side pushes the solid flange (63) to move rightward, the bellows unit on the left side is extended, and the bellows unit on the right side is compressed. The solid flange (63) drives the feedback displacement measurement plate (61) and the output rod (67) to move rightward; the feedback position is installed The displacement sensor on the displacement measuring plate (61) measures the displacement of the output rod (67), and the displacement and the expected displacement form a closed-loop control system. When the output rod (67) reaches the specified position, the A and B power sources (1) and (11) will maintain the current position. When the position of the output rod (67) shifts, the two power sources will fine-tune the output energy to achieve precise control of the displacement of the output rod (67); similarly, the pressure in the tube of the high-temperature liquid alloy actuator (6) and the expected system pressure form a closed loop to achieve precise control of the force of the output rod (67).

10. The method of corrugated hydraulic transmission based on liquid alloy in high temperature service environment according to claim 9, characterized in that: After the hardware part of the transmission device in the first step is assembled, electric welding can be used to strengthen the connection and sealing of each part.

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