CN103953853B - Device for balancing pressure fluctuation of liquid circulation loop - Google Patents
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Abstract
Description
技术领域technical field
本发明涉及一种实时实现压力平衡的方法和装置，尤指一种用于平衡液体循环回路压力波动的装置。The invention relates to a method and device for realizing pressure balance in real time, in particular to a device for balancing pressure fluctuations in a liquid circulation circuit.
背景技术Background technique
在闭式液体循环回路系统中，压力的波动对于系统的影响非常大，常常有冲击压力高达正常运行压力的十倍甚至数十倍，进而造成循环系统损坏的现象。尤其是在低温液体闭式循环系统中，系统热负荷的变化通常使得低温介质的温度发生变化，进而导致循环工作压力显著波动。为保证循环系统的正常稳定运行，需要对系统进行压力调节，使得循环工作压力在一定范围内保持恒定。In a closed liquid circulation loop system, pressure fluctuations have a great impact on the system, and the impact pressure is often as high as ten times or even dozens of times the normal operating pressure, which in turn causes damage to the circulation system. Especially in the cryogenic liquid closed cycle system, the change of the heat load of the system usually causes the temperature of the cryogenic medium to change, which in turn leads to significant fluctuations in the circulating working pressure. In order to ensure the normal and stable operation of the circulation system, it is necessary to adjust the pressure of the system so that the circulation working pressure remains constant within a certain range.
对于常温液体循环回路系统压力波动的调节，中国专利公开文献公告号为CN201461614U中描述了一种采用弹簧调节液压系统压力波动的装置，其特征在于，壳体的下端固定在液压系统的油路上，两个滑块滑配在壳体孔中，弹簧置于两滑块之间，通过弹簧的弹性运动来实现液压系统的压力平衡。然而，涉及一些对环境有较大影响的液体，滑块密封性能的好坏将严重影响压力缓冲装置能否正常运行。For the adjustment of the pressure fluctuation of the normal temperature liquid circulation circuit system, the Chinese Patent Publication No. CN201461614U describes a device that uses a spring to adjust the pressure fluctuation of the hydraulic system. It is characterized in that the lower end of the housing is fixed on the oil circuit of the hydraulic system. The two sliders are slidably fitted in the housing hole, and the spring is placed between the two sliders, and the pressure balance of the hydraulic system is realized through the elastic movement of the spring. However, involving some liquids that have a greater impact on the environment, the quality of the sealing performance of the slider will seriously affect the normal operation of the pressure buffer device.
对于低温液体循环回路系统压力波动调节，常用的方法是在低温液体循环回路系统中设置杜瓦，通过气液相变调节来改变循环系统的压力使其恢复平衡。具体而言，是在杜瓦中加装电加热器。当系统热负荷增大导致低温液体温度升高进而出现压力增大时，通过撤掉一部分电加热器的功率，杜瓦内一部分气相冷凝成液相，从而使得杜瓦内的压力减小，低温液体循环回路系统的工作压力随之减小并恢复到平衡状态。另一方面，当系统热负荷减小导致低温液体的温度降低进而出现压力减小时，通过增加杜瓦内电加热器的功率，使得杜瓦内一部分的液相气化，从而使得低温液体循环回路系统的工作压力随之增大并恢复到平衡状态。然而，该方法在实现低温液体循环回路系统压力波动调节时存在一定的不足之处：杜瓦内的气液相变调节压力的方式，无法实现精准控制，因而调节精度较差；并且由于电加热器功率的调节存在着时间延迟，控制滞后将引起系统压力在短时间内波动剧烈，不利于液体循环回路系统的稳定运行；虽然中国专利公开号为CN101620036A一种基于压力平衡式的波纹管容积位移关系的检测装置公开了一种测量波纹管在某一工作压力下的位移和容积的装置，尤指一种能提高波纹管容积和位移的测量精度的基于压力平衡式的波纹管容积位移关系的检测装置，但该装置结构较为复杂,同时与本发明创造中的测量方法存在明显不同。For the pressure fluctuation adjustment of the low temperature liquid circulation loop system, the common method is to set up a Dewar in the low temperature liquid circulation loop system, and change the pressure of the circulation system through gas-liquid phase change adjustment to restore balance. Specifically, an electric heater is added to the Dewar. When the heat load of the system increases and the temperature of the low-temperature liquid increases and the pressure increases, by removing a part of the power of the electric heater, a part of the gas phase in the Dewar condenses into a liquid phase, thereby reducing the pressure in the Dewar, and the low temperature The working pressure of the liquid circulation loop system decreases accordingly and returns to a balanced state. On the other hand, when the heat load of the system decreases and the temperature of the cryogenic liquid decreases and the pressure decreases, by increasing the power of the electric heater in the Dewar, a part of the liquid phase in the Dewar is vaporized, thereby making the cryogenic liquid circulation loop The working pressure of the system increases and returns to equilibrium. However, this method has certain deficiencies in the regulation of pressure fluctuations in the low-temperature liquid circulation loop system: the gas-liquid phase change in the Dewar to regulate the pressure cannot achieve precise control, so the regulation accuracy is poor; and due to the electric heating There is a time delay in the adjustment of the power of the device, and the control lag will cause the system pressure to fluctuate violently in a short period of time, which is not conducive to the stable operation of the liquid circulation loop system; although the Chinese patent publication number is CN101620036A, a bellows volume displacement based on pressure balance The detection device for the relationship discloses a device for measuring the displacement and volume of a bellows under a certain working pressure, especially a pressure-balanced bellows volume-displacement relationship that can improve the measurement accuracy of the volume and displacement of the bellows A detection device, but the structure of the device is relatively complicated, and it is obviously different from the measurement method in the invention.
发明内容Contents of the invention
为了弥补现有技术中的不足，本发明旨在公开一种能够应用于常温液体或低温液体的循环回路系统中，通过波纹管的拉伸或收缩的情况实现容积补偿，用于调节液体循环回路系统的压力波动的一种用于平衡液体循环回路压力波动的装置。In order to make up for the deficiencies in the prior art, the present invention aims to disclose a circulation loop system that can be applied to normal-temperature liquids or low-temperature liquids, and realize volume compensation through the stretching or contraction of the bellows, and is used to adjust the liquid circulation loop A device used to balance the pressure fluctuation of the liquid circulation circuit for the pressure fluctuation of the system.
为实现上述目的，本发明采用的技术方案是：一种用于平衡液体循环回路压力波动的装置，其特征在于：In order to achieve the above purpose, the technical solution adopted by the present invention is: a device for balancing the pressure fluctuation of the liquid circulation circuit, which is characterized in that:
所述的装置由一个压力缓冲器通过连接管路与一个气体缓冲罐连接形成压力波动平衡系统，The device is composed of a pressure buffer connected to a gas buffer tank through a connecting pipeline to form a pressure fluctuation balance system,
所述的压力缓冲器安装于一外筒体中，其整体结构包括内波纹管、外波纹管、内轴、限位机构、外容器、镜面结构和位移测量系统，其中，内波纹管、内轴、限位机构安装于外容器中，内波纹管与外波纹管之间通过内轴连接，使内波纹管的运动位移可传递至外波纹管，外波纹管实现内轴的密封；所述位移测量系统包括激光位移传感器或线性可变差动变压器，所述的镜面结构安装在外筒体端面，位移传感器安装在镜面结构正对上方对波纹管变形量进行测量，监测内波纹管的运动位移传递至外波纹管的运动情况，从而实时监控压力缓冲器的工作状态；正常工作时，液体工作介质将包围内波纹管并充满外容器的整个空间，内波纹管内侧充满气体工作介质，并通过连接管路连接至气体缓冲罐；The pressure buffer is installed in an outer cylinder, and its overall structure includes an inner bellows, an outer bellows, an inner shaft, a limit mechanism, an outer container, a mirror structure and a displacement measurement system, wherein the inner bellows, the inner The shaft and the limit mechanism are installed in the outer container, and the inner bellows and the outer bellows are connected by the inner shaft, so that the movement displacement of the inner bellows can be transmitted to the outer bellows, and the outer bellows realizes the sealing of the inner shaft; The displacement measurement system includes a laser displacement sensor or a linear variable differential transformer. The mirror structure is installed on the end face of the outer cylinder, and the displacement sensor is installed directly above the mirror structure to measure the deformation of the bellows and monitor the movement displacement of the inner bellows The movement of the outer bellows is transmitted to monitor the working status of the pressure buffer in real time; during normal operation, the liquid working medium will surround the inner bellows and fill the entire space of the outer container, and the inside of the inner bellows is filled with gas working medium, and through The connecting pipeline is connected to the gas buffer tank;
所述的气体缓冲罐为一常温气体储罐，通过连接管路连接在压力缓冲器的气体侧，以实现气体侧的压力保持恒定。The gas buffer tank is a normal temperature gas storage tank, which is connected to the gas side of the pressure buffer through a connecting pipeline, so as to keep the pressure of the gas side constant.
所述的限位机构包括上止点和下止点，通过上、下止点限制内波纹管的变形程度。The limiting mechanism includes a top dead center and a bottom dead center, and the deformation degree of the inner bellows is limited by the top and bottom dead centers.
所述内波纹管可为焊接波纹管；外波纹管为焊接波纹管或成型波纹管。The inner bellows can be welded bellows; the outer bellows can be welded bellows or shaped bellows.
所述的液体循环回路系统中的液体工作介质为低温液体或常温液体。The liquid working medium in the liquid circulation loop system is cryogenic liquid or normal temperature liquid.
所述的气体缓冲罐中气体工作介质为沸点低于液体循环回路系统中工作介质的气体。The gas working medium in the gas buffer tank is a gas whose boiling point is lower than that of the working medium in the liquid circulation loop system.
所述的液体循环回路系统由终端用户、动力元件、控制元件以及用于平衡液体循环回路压力波动的装置连接形成的闭式低温液体循环回路系统，The liquid circulation loop system is a closed low-temperature liquid circulation loop system formed by connecting end users, power components, control components, and devices for balancing pressure fluctuations in the liquid circulation loop,
当低温液体循环回路正常工作时，若终端用户因工作产生热负荷引起低温液体压力波动，压力缓冲器的波纹管受到液体侧及气体侧不平衡压力的作用而被压缩或拉伸，液体侧的容积相应地得到补偿或压缩，从而使得液体侧的压力恢复到平衡压力，由此实现了对低温液体循环回路的压力波动的平衡控制。When the cryogenic liquid circulation circuit is working normally, if the pressure fluctuation of the cryogenic liquid is caused by the heat load of the end user due to work, the bellows of the pressure buffer will be compressed or stretched by the unbalanced pressure of the liquid side and the gas side, and the bellows of the liquid side will be compressed or stretched. The volume is compensated or compressed accordingly, so that the pressure on the liquid side returns to the equilibrium pressure, thereby achieving balanced control of pressure fluctuations in the cryogenic liquid circulation circuit.
所述的压力缓冲器的外容器外侧包裹绝热材料做绝热处理，外容器外侧设置为真空环境。The outside of the outer container of the pressure buffer is wrapped with heat insulating material for heat insulation treatment, and the outside of the outer container is set as a vacuum environment.
所述的液体循环回路系统由执行元件、动力元件、控制元件以及用于平衡液体循环回路压力波动的装置连接形成的闭式常温液体循环回路系统，The liquid circulation loop system is a closed normal-temperature liquid circulation loop system formed by connecting executive elements, power elements, control elements, and devices for balancing pressure fluctuations in the liquid circulation loop,
当常温液体循环回路正常工作时，若执行元件因执行命令而使常温液体的热负荷变化进而引起液体压力波动，压力缓冲器的波纹管受到液体侧及气体侧不平衡压力的作用而被压缩或拉伸，液体侧的容积相应地得到补偿或压缩，从而使得液体侧的压力恢复到平衡压力，由此实现了对常温液体循环回路的压力波动的平衡控制。When the normal temperature liquid circulation circuit is working normally, if the heat load of the normal temperature liquid changes due to the execution of the command by the actuator and the liquid pressure fluctuates, the bellows of the pressure buffer is compressed or compressed by the unbalanced pressure of the liquid side and the gas side. Stretching, the volume on the liquid side is compensated or compressed accordingly, so that the pressure on the liquid side returns to the equilibrium pressure, thereby realizing the balanced control of the pressure fluctuation of the normal temperature liquid circulation circuit.
本发明的有益效果是：本发明一种用于平衡液体循环回路压力波动的装置提供一种利用压力缓冲器中的波纹管的拉伸与收缩将液体工作介质的压力波动传递至气体缓冲罐中的气体工作介质，从而实现液体工作介质压力波动控制的方法和装置，首先波纹管良好的密封性能，能避免液体工作介质被气体工作介质污染，其次辅助的位移测量能够直观准确地显示波纹管的运动情况，能够实现实时监控；再者整个压力缓冲装置结构简单，操作方便；相对于其他压力波动控制手段，具有结构紧凑、操作方便、调节精度高、压力平衡时间短而稳定的特点，是一般闭式液体循环回路系统调节系统工作压力的一种高效可行的装置。The beneficial effect of the present invention is that: a device for balancing the pressure fluctuation of the liquid circulation circuit provided by the present invention provides a method to transmit the pressure fluctuation of the liquid working medium to the gas buffer tank by using the stretching and contraction of the bellows in the pressure buffer The gas working medium, so as to realize the method and device for controlling the pressure fluctuation of the liquid working medium. Firstly, the good sealing performance of the bellows can prevent the liquid working medium from being polluted by the gas working medium. Secondly, the auxiliary displacement measurement can intuitively and accurately display the bellows. Real-time monitoring of the movement situation can be realized; moreover, the whole pressure buffer device has a simple structure and is easy to operate; compared with other pressure fluctuation control methods, it has the characteristics of compact structure, convenient operation, high adjustment accuracy, short and stable pressure balance time, and is a general It is an efficient and feasible device for regulating the working pressure of the closed liquid circulation loop system.
附图说明Description of drawings
图1为本发明压力缓冲装置的结构示意图；Fig. 1 is the structural representation of pressure buffer device of the present invention;
图2为将本发明的压力缓冲装置用于低温液体闭式循环回路系统的示意图；Fig. 2 is a schematic diagram of using the pressure buffer device of the present invention in a cryogenic liquid closed loop system;
图3为将本发明的压力缓冲装置用于常温液体闭式循环回路系统的示意图。Fig. 3 is a schematic diagram of applying the pressure buffer device of the present invention to a normal temperature liquid closed loop system.
附图标注说明：Notes on drawings:
1-液体入口，2-外容器，3-限位机构，4-内波纹管，5-内轴，6-外波纹管，7-外筒体，8-镜面结构，9-位移传感器，10-液体出口，11-连接管路，12-气体缓冲罐。1-liquid inlet, 2-outer container, 3-limiting mechanism, 4-inner bellows, 5-inner shaft, 6-outer bellows, 7-outer cylinder, 8-mirror structure, 9-displacement sensor, 10 -liquid outlet, 11-connecting pipeline, 12-gas buffer tank.
具体实施方式detailed description
下面结合附图详细说明本发明的具体实施方式：The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing:
一种用于平衡液体循环回路压力波动的装置，所述的装置由一个压力缓冲器通过连接管路11与一个气体缓冲罐12连接形成压力波动平衡系统，所述的压力缓冲器安装于一外筒体中，其整体结构包括内波纹管4、外波纹管6、内轴5、限位机构3、外容器2、镜面结构8和位移测量系统，其中，内波纹管4、内轴5、限位机构3安装于外容器2中，内波纹管4与外波纹管6之间通过内轴5连接，使内波纹管4的运动位移可传递至外波纹管6，外波纹管6实现内轴5的密封；所述位移测量系统包括激光位移传感器9或线性可变差动变压器，所述的镜面结构8安装在外筒体7端面，位移传感器9安装在镜面结构8正对上方对波纹管变形量进行测量，监测内波纹管4的运动位移传递至外波纹管6的运动情况，从而实时监控压力缓冲器的工作状态；正常工作时，液体工作介质将包围内波纹管4并充满外容器2的整个空间，内波纹管4内侧充满气体工作介质，并通过连接管路11连接至气体缓冲罐12；所述的气体缓冲罐12为一常温气体储罐，通过连接管路11连接在压力缓冲器的气体侧，以实现气体侧的压力保持恒定；所述的限位机构3包括上止点和下止点，通过上、下止点限制内波纹管4的变形程度。A device for balancing pressure fluctuations in a liquid circulation circuit. The device is composed of a pressure buffer connected to a gas buffer tank 12 through a connecting pipeline 11 to form a pressure fluctuation balance system. The pressure buffer is installed in an external In the barrel, its overall structure includes an inner bellows 4, an outer bellows 6, an inner shaft 5, a limit mechanism 3, an outer container 2, a mirror structure 8 and a displacement measurement system, wherein the inner bellows 4, the inner shaft 5, The limit mechanism 3 is installed in the outer container 2, and the inner bellows 4 and the outer bellows 6 are connected by the inner shaft 5, so that the movement displacement of the inner bellows 4 can be transmitted to the outer bellows 6, and the outer bellows 6 realizes the inner Sealing of the shaft 5; the displacement measurement system includes a laser displacement sensor 9 or a linear variable differential transformer, the mirror structure 8 is installed on the end surface of the outer cylinder 7, and the displacement sensor 9 is installed on the bellows directly above the mirror structure 8 The deformation is measured, and the movement displacement of the inner bellows 4 is monitored to the movement of the outer bellows 6, so as to monitor the working state of the pressure buffer in real time; during normal operation, the liquid working medium will surround the inner bellows 4 and fill the outer container 2, the inside of the inner bellows 4 is filled with gas working medium, and is connected to the gas buffer tank 12 through the connecting pipeline 11; the gas buffer tank 12 is a normal temperature gas storage tank, connected through the connecting pipeline 11 The gas side of the buffer is used to keep the pressure of the gas side constant; the limit mechanism 3 includes a top dead center and a bottom dead center, and the degree of deformation of the inner bellows 4 is limited by the top and bottom dead centers.
所述内波纹管4可为焊接波纹管；外波纹管6为焊接波纹管或成型波纹管，焊接波纹管相较于成型波纹管，由于其刚度较小使得细微的压力变化能够使得波纹管产生位移，或是在同样的压力变化下焊接波纹管的运动位移更大，容积补偿能力更大且便于位移的测量，而且波纹管的良好密封性能能够有效地隔离液体工质和气体工质，从而避免了气液间的相互污染。The inner bellows 4 can be a welded bellows; the outer bellows 6 is a welded bellows or a formed bellows. Compared with a formed bellows, a welded bellows has a smaller rigidity so that slight pressure changes can make the bellows produce Displacement, or under the same pressure change, the movement displacement of the welded bellows is larger, the volume compensation capacity is greater and the displacement measurement is convenient, and the good sealing performance of the bellows can effectively isolate the liquid working medium and the gas working medium, thereby Mutual contamination between gas and liquid is avoided.
所述液体循环回路系统中的工作介质为低温液体或常温液体，其中低温液体可为液氮、液氧、液氩、液氢或液化天然气；常温液体可为水、油等；所述的气体缓冲罐12中气体工作介质为沸点低于液体循环回路系统中工作介质的气体。The working medium in the liquid circulation loop system is cryogenic liquid or normal temperature liquid, wherein the low temperature liquid can be liquid nitrogen, liquid oxygen, liquid argon, liquid hydrogen or liquefied natural gas; the normal temperature liquid can be water, oil, etc.; the gas The gas working medium in the buffer tank 12 is a gas whose boiling point is lower than that of the working medium in the liquid circulation loop system.
当液体循环回路系统的工作介质为低温液体时，所述的气体缓冲罐12中气体工作介质为沸点低于所采用的液体工作介质沸点的气体，例如，当液体工作介质为液氢时，气体工作介质可为氦气，即沸点低于液氢沸点的气体工质；当液体工作介质为液氮时，气体工作介质可为氦气、氢气，即沸点低于液氮沸点的气体工质；当液体循环回路系统的工作介质为常温液体时，所述的气体缓冲罐12中气体工作介质为常见的室温可压缩气体；例如，液体工作介质为油时，气体工作介质可为氦气、氢气、氮气、氩气或空气等。When the working medium of the liquid circulation loop system is cryogenic liquid, the gas working medium in the gas buffer tank 12 is a gas whose boiling point is lower than that of the liquid working medium used, for example, when the liquid working medium is liquid hydrogen, the gas The working medium can be helium, that is, a working fluid with a boiling point lower than that of liquid hydrogen; when the liquid working medium is liquid nitrogen, the working medium can be helium or hydrogen, that is, a working fluid with a boiling point lower than that of liquid nitrogen; When the working medium of the liquid circulation loop system is a normal temperature liquid, the gas working medium in the gas buffer tank 12 is a common room temperature compressible gas; for example, when the liquid working medium is oil, the gas working medium can be helium, hydrogen , nitrogen, argon or air.
当用于平衡液体循环回路压力波动的装置正常工作时，液体工作介质由液体入口1进入容器并充满，由液体出口10流出，所述内波纹管4将被液体工作介质包围，利用波纹管的收缩和拉伸实现压力波动的调节，内波纹管4内腔充满气体工作介质，通过连接管路11与气体缓冲罐12相连，所述位移测量系统，由位移传感器9实现波纹管变形量的测量，通过位移传感器9监测波纹管的运动情况，从而实时监控压力缓冲器的工作状态；当液体侧的压力升高时，由于气体侧连接了气体缓冲罐12，使得压力缓冲器气体侧的压力基本保持不变，气液间的压力差将使得内波纹管4收缩，液体侧的容积得到补偿从而使得液体的压力减小进而恢复到工作压力，波纹管在新的位置达到平衡；当液体侧的压力减小时，气液间的压力差将导致内波纹管4拉伸，液体侧的容积被压缩从而使得液体的压力增大进而恢复到工作压力；本发明利用波纹管的收缩和拉伸，将液体侧的压力波动传递至气体侧，通过将气体侧连接一气体缓冲罐12来维持压力缓冲器气体侧的压力恒定，通过改变波纹管的位移来实现液体压力波动的控制。When the device for balancing the pressure fluctuation of the liquid circulation circuit works normally, the liquid working medium enters the container through the liquid inlet 1 and fills it up, and flows out through the liquid outlet 10, and the inner bellows 4 will be surrounded by the liquid working medium, utilizing the bellows Shrinkage and stretching realize the adjustment of pressure fluctuations. The inner cavity of the inner bellows 4 is filled with gas working medium, and is connected to the gas buffer tank 12 through the connecting pipeline 11. The displacement measurement system uses the displacement sensor 9 to realize the measurement of the deformation of the bellows. , the movement of the bellows is monitored by the displacement sensor 9, thereby monitoring the working state of the pressure buffer in real time; when the pressure on the liquid side increases, the pressure on the gas side of the pressure buffer is basically Keeping the same, the pressure difference between gas and liquid will make the inner bellows 4 shrink, and the volume on the liquid side will be compensated so that the pressure of the liquid will decrease and then return to the working pressure, and the bellows will reach equilibrium in the new position; when the volume on the liquid side When the pressure decreases, the pressure difference between the gas and the liquid will cause the inner bellows 4 to stretch, and the volume on the liquid side will be compressed so that the pressure of the liquid will increase and then return to the working pressure; the present invention utilizes the shrinkage and stretching of the bellows to The pressure fluctuation on the liquid side is transmitted to the gas side, and the pressure on the gas side of the pressure buffer is maintained constant by connecting the gas side to a gas buffer tank 12, and the control of the liquid pressure fluctuation is realized by changing the displacement of the bellows.
实施例一：一种使用用于平衡液体循环回路压力波动的装置的低温液体闭式循环系统。Embodiment 1: A low-temperature liquid closed circulation system using a device for balancing the pressure fluctuation of the liquid circulation circuit.
所述的液体循环回路系统由终端用户、动力元件、控制元件以及用于平衡液体循环回路压力波动的装置连接形成的闭式低温液体循环回路系统，其中所述的用于平衡液体循环回路压力波动的装置由一个压力缓冲器通过连接管路11与一个气体缓冲罐12连接形成压力波动平衡系统，循环系统的液体工作介质为低温液氢；所述的压力缓冲器安装于一外筒体7中，其整体结构包括内波纹管4、外波纹管6、内轴5、限位机构3、外容器2、镜面结构8和位移测量系统，其中，内波纹管4、内轴5、限位机构3安装于外容器2中，内波纹管4与外波纹管6之间通过内轴5连接，使内波纹管4的运动位移可传递至外波纹管6，外波纹管6实现内轴5的密封；所述位移测量系统包括激光位移传感器9或线性可变差动变压器，所述的镜面结构8安装在外筒体7端面，位移传感器9安装在镜面结构8正对上方对波纹管变形量进行测量，监测内波纹管4的运动位移传递至外波纹管6的运动情况，从而实时监控压力缓冲器的工作状态；正常工作时，液体工作介质将包围内波纹管4并充满外容器2的整个空间，内波纹管4内侧充满气体工作介质，并通过连接管路11连接至气体缓冲罐12；所述的气体缓冲罐12为一常温气体储罐，气体缓冲罐12内的工作介质为氦气，通过连接管路11连接在压力缓冲器的气体侧，以实现气体侧的压力保持恒定；当低温液体循环回路正常工作时，若终端用户因工作产生热负荷引起低温液体压力波动，压力缓冲器的波纹管受到液体侧及气体侧不平衡压力的作用而被压缩或拉伸，液体侧的容积相应地得到补偿或压缩，从而使得液体侧的压力恢复到平衡压力，由此实现了对低温液体循环回路的压力波动的平衡控制。The liquid circulation loop system is a closed low-temperature liquid circulation loop system formed by connecting end users, power elements, control elements, and devices for balancing pressure fluctuations in the liquid circulation loop, wherein the pressure fluctuations for balancing the liquid circulation loop The device consists of a pressure buffer connected to a gas buffer tank 12 through a connecting pipeline 11 to form a pressure fluctuation balance system, and the liquid working medium of the circulation system is cryogenic liquid hydrogen; the pressure buffer is installed in an outer cylinder 7 , its overall structure includes an inner bellows 4, an outer bellows 6, an inner shaft 5, a limit mechanism 3, an outer container 2, a mirror structure 8 and a displacement measurement system, wherein the inner bellows 4, the inner shaft 5, the limit mechanism 3 Installed in the outer container 2, the inner bellows 4 and the outer bellows 6 are connected by the inner shaft 5, so that the movement displacement of the inner bellows 4 can be transmitted to the outer bellows 6, and the outer bellows 6 realizes the movement of the inner shaft 5 sealed; the displacement measurement system includes a laser displacement sensor 9 or a linear variable differential transformer, the mirror structure 8 is installed on the end face of the outer cylinder 7, and the displacement sensor 9 is installed on the mirror structure 8 directly above the bellows deformation Measurement, monitoring the movement of the inner bellows 4 to the movement of the outer bellows 6, so as to monitor the working state of the pressure buffer in real time; in normal operation, the liquid working medium will surround the inner bellows 4 and fill the entire outer container 2 Space, the inside of the inner bellows 4 is filled with gas working medium, and is connected to the gas buffer tank 12 through the connecting pipeline 11; the gas buffer tank 12 is a normal temperature gas storage tank, and the working medium in the gas buffer tank 12 is helium , connected to the gas side of the pressure buffer through the connecting pipeline 11, so as to keep the pressure on the gas side constant; The bellows are compressed or stretched by the unbalanced pressure on the liquid side and the gas side, and the volume on the liquid side is compensated or compressed accordingly, so that the pressure on the liquid side returns to the equilibrium pressure, thus realizing the cryogenic liquid Balanced control of pressure fluctuations in the circulation loop.
实施例二：一种使用用于平衡液体循环回路压力波动的装置的常温液体闭式循环系统。Embodiment 2: A normal temperature liquid closed circulation system using a device for balancing the pressure fluctuation of the liquid circulation circuit.
所述的液体循环回路系统由执行元件、动力元件、控制元件以及用于平衡液体循环回路压力波动的装置连接形成的闭式常温液体循环回路系统，其中所述的用于平衡液体循环回路压力波动的装置由一个压力缓冲器通过连接管路11与一个气体缓冲罐12连接形成压力波动平衡系统，循环系统的液体工作介质为常温液压油；所述的压力缓冲器安装于一外筒体7中，其整体结构包括内波纹管4、外波纹管6、内轴5、限位机构3、外容器2、镜面结构8和位移测量系统，其中，内波纹管4、内轴5、限位机构3安装于外容器2中，内波纹管4与外波纹管6之间通过内轴5连接，使内波纹管4的运动位移可传递至外波纹管6，外波纹管6实现内轴5的密封；所述位移测量系统包括激光位移传感器9或线性可变差动变压器，所述的镜面结构8安装在外筒体7端面，位移传感器9安装在镜面结构8正对上方对波纹管变形量进行测量，监测内波纹管4的运动位移传递至外波纹管6的运动情况，从而实时监控压力缓冲器的工作状态；正常工作时，液体工作介质将包围内波纹管4并充满外容器2的整个空间，内波纹管4内侧充满气体工作介质，并通过连接管路11连接至气体缓冲罐12；所述的气体缓冲罐12为一常温气体储罐，气体缓冲罐12内的工作介质为氦气，通过连接管路11连接在压力缓冲器的气体侧，以实现气体侧的压力保持恒定；当常温液体循环回路正常工作时，若执行元件因执行命令而使常温液体的热负荷变化进而引起液体压力波动，压力缓冲器的波纹管受到液体侧及气体侧不平衡压力的作用而被压缩或拉伸，液体侧的容积相应地得到补偿或压缩，从而使得液体侧的压力恢复到平衡压力，由此实现了对常温液体循环回路的压力波动的平衡控制。The liquid circulation loop system is a closed normal temperature liquid circulation loop system formed by connecting executive components, power components, control components and devices for balancing the pressure fluctuations of the liquid circulation loop, wherein the pressure fluctuation for balancing the liquid circulation loop The device consists of a pressure buffer connected to a gas buffer tank 12 through a connecting pipeline 11 to form a pressure fluctuation balance system, and the liquid working medium of the circulation system is normal temperature hydraulic oil; the pressure buffer is installed in an outer cylinder 7 , its overall structure includes an inner bellows 4, an outer bellows 6, an inner shaft 5, a limit mechanism 3, an outer container 2, a mirror structure 8 and a displacement measurement system, wherein the inner bellows 4, the inner shaft 5, the limit mechanism 3 Installed in the outer container 2, the inner bellows 4 and the outer bellows 6 are connected by the inner shaft 5, so that the movement displacement of the inner bellows 4 can be transmitted to the outer bellows 6, and the outer bellows 6 realizes the movement of the inner shaft 5 sealed; the displacement measurement system includes a laser displacement sensor 9 or a linear variable differential transformer, the mirror structure 8 is installed on the end face of the outer cylinder 7, and the displacement sensor 9 is installed on the mirror structure 8 directly above the bellows deformation Measurement, monitoring the movement of the inner bellows 4 to the movement of the outer bellows 6, so as to monitor the working state of the pressure buffer in real time; in normal operation, the liquid working medium will surround the inner bellows 4 and fill the entire outer container 2 Space, the inside of the inner bellows 4 is filled with gas working medium, and is connected to the gas buffer tank 12 through the connecting pipeline 11; the gas buffer tank 12 is a normal temperature gas storage tank, and the working medium in the gas buffer tank 12 is helium , connected to the gas side of the pressure buffer through the connecting pipeline 11, so as to keep the pressure on the gas side constant; Pressure fluctuation, the bellows of the pressure buffer is compressed or stretched by the unbalanced pressure of the liquid side and the gas side, and the volume of the liquid side is compensated or compressed accordingly, so that the pressure of the liquid side returns to the equilibrium pressure, by This realizes the balanced control of the pressure fluctuation of the normal temperature liquid circulation circuit.
实施例一和实施例二中的结构略有所不同，特别是用于低温液体工作介质时，压力缓冲器需要做绝热处理，即在压力缓冲器外容器2外侧包裹多层绝热材料，并建立外容器2外侧与外筒体7内侧之间的真空环境，此外，气体缓冲罐12与压力缓冲器气体侧的连接管路11会更长，以减小压力缓冲器的漏热。The structures in Embodiment 1 and Embodiment 2 are slightly different, especially when used in low-temperature liquid working medium, the pressure buffer needs to be insulated, that is, wrap multiple layers of heat-insulating material outside the outer container 2 of the pressure buffer, and establish The vacuum environment between the outside of the outer container 2 and the inside of the outer cylinder 7, in addition, the connection pipeline 11 between the gas buffer tank 12 and the gas side of the pressure buffer will be longer to reduce the heat leakage of the pressure buffer.
以上所述，仅是本发明的较佳实施例，并非对本发明的技术范围作任何限制，本行业的技术人员，在本技术方案的启迪下，可以做出一些变形与修改，凡是依据本发明的技术实质对以上的实施例所作的任何修改、等同变化与修饰，均仍属于本发明技术方案的范围内。The above are only preferred embodiments of the present invention, and are not intended to limit the technical scope of the present invention. Those skilled in the art can make some deformations and modifications under the inspiration of this technical solution. Any modifications, equivalent changes and modifications made to the above embodiments by technical essence still belong to the scope of the technical solution of the present invention.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102939444A (en) * | 2010-06-09 | 2013-02-20 | 罗伯特·博世有限公司 | Pressure equalization device for hydraulic systems |
| CN103515061A (en) * | 2013-10-25 | 2014-01-15 | 国家电网公司 | Intelligent dynamic sealed liquid storage tank equipped with metal ripple compensator and use method of intelligent dynamic sealed liquid storage tank |
| CN203880399U (en) * | 2014-04-22 | 2014-10-15 | 东莞中子科学中心 | Device for balancing pressure fluctuation of liquid circulation loop |
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