CN205605376U - Utilize shape memory alloy driven hydraulic pump - Google Patents

Utilize shape memory alloy driven hydraulic pump Download PDF

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CN205605376U
CN205605376U CN201620397125.7U CN201620397125U CN205605376U CN 205605376 U CN205605376 U CN 205605376U CN 201620397125 U CN201620397125 U CN 201620397125U CN 205605376 U CN205605376 U CN 205605376U
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hydraulic pump
memory alloy
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张科
唐志平
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University of Science and Technology of China USTC
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Abstract

本实用新型公开了一种利用形状记忆合金驱动的液压泵,该液压泵包括固定支架(1)、第一液压泵体(2A)、第二液压泵体(2B)、双头活塞(3)、第一组形状记忆合金元件(4A)、第二组形状记忆合金元件(4B)、第一组加热器(5A)、第二组加热器(5B)及紧固件(6)。利于加热器交替对两组形状记忆合金元件加热,控制形状记忆合金元件长度变化,带动双头活塞来回移动,实现双向驱动作用。本装置结构简单,原理清晰。形状记忆合金元件受力为纯拉伸,材料利用效率高。和液压系统复合,可以利用液压系统的各种成熟技术,具有通用性。尤其适合于各类仿生机器人的运动驱动。

The utility model discloses a hydraulic pump driven by a shape memory alloy. The hydraulic pump comprises a fixed support (1), a first hydraulic pump body (2A), a second hydraulic pump body (2B), and a double-headed piston (3). , a first set of shape memory alloy elements (4A), a second set of shape memory alloy elements (4B), a first set of heaters (5A), a second set of heaters (5B) and fasteners ( 6 ). It is beneficial for the heater to alternately heat the two sets of shape memory alloy elements, control the length change of the shape memory alloy elements, drive the double-headed piston to move back and forth, and realize the bidirectional driving effect. The device has simple structure and clear principle. The force of the shape memory alloy element is pure tension, and the material utilization efficiency is high. Combined with the hydraulic system, various mature technologies of the hydraulic system can be used, and it has versatility. It is especially suitable for the motion drive of various bionic robots.

Description

一种利用形状记忆合金驱动的液压泵A hydraulic pump driven by shape memory alloy

技术领域technical field

本实用新型涉及液压泵的技术领域,尤其涉及一种利用形状记忆合金驱动的液压泵。The utility model relates to the technical field of hydraulic pumps, in particular to a hydraulic pump driven by a shape memory alloy.

背景技术Background technique

形状记忆合金是一种应用较为广泛的智能材料,变形受应力和温度的双重控制,其物理实质是热弹性马氏体相变。当材料温度低于马氏体向奥氏体相变的起始温度时,材料处于马氏体相状态,材料的承载力较低,在外力作用下比较容易发生变形;而对变形后的马氏体相材料升温,直至高于马氏体向奥氏体相变的完成温度点时,材料发生逆相变,转变成奥氏体相,并恢复此前的形状,于此同时,还可以承担较大的负载,对外做功。这就是著名的形状记忆效应,及其驱动原理。利用形状记忆合金的这一原理,现已开发出了形状记忆合金管接头,形状记忆合金空间解锁装置等成熟产品,并得到大量应用。Shape memory alloy is a widely used smart material, its deformation is controlled by both stress and temperature, and its physical essence is thermoelastic martensitic transformation. When the temperature of the material is lower than the initial temperature of the transformation from martensite to austenite, the material is in the martensite phase state, the bearing capacity of the material is low, and it is easier to deform under the action of external force; and for the deformed martensite When the temperature of the tenite phase material is raised until it is higher than the completion temperature point of the transformation from martensite to austenite, the material undergoes reverse phase transformation, transforms into austenite phase, and restores its previous shape. At the same time, it can also bear Larger loads do work externally. This is the famous shape memory effect and its driving principle. Utilizing this principle of shape memory alloys, mature products such as shape memory alloy pipe joints and shape memory alloy space unlocking devices have been developed, and have been widely used.

另一方面,机器人产业,尤其是仿生机器人领域正在蓬勃发展,对各种驱动器有着十分旺盛的需求。形状记忆合金驱动器因为结构简单,控制方便,输出功率大等优点,得到了很大的关注,在机器人驱动领域占据了重要的一席之地。多项专利申请(申请号CN201210044542.X,申请号CN201210041105.2,申请号CN201320458623.4,申请号CN201410353149.8,申请号CN201510440930.3等)介绍了利用形状记忆合金的各类仿生机器人或者驱动器。现有的形状记忆合金驱动器,主要利用形状记忆合金丝材或者螺旋弹簧作为驱动元件:丝材的出力大,效率高,但是行程小;螺旋弹簧的行程大,但效率低,出力小。如何兼顾出力和行程,设计出高效率的形状记忆合金驱动器,具有迫切的现实需求和重大的应用前景。On the other hand, the robot industry, especially the field of bionic robots is booming, and there is a very strong demand for various drives. Shape memory alloy drivers have attracted a lot of attention because of their simple structure, convenient control, and high output power, and they have occupied an important place in the field of robot drives. A number of patent applications (application number CN201210044542.X, application number CN201210041105.2, application number CN201320458623.4, application number CN201410353149.8, application number CN201510440930.3, etc.) have introduced various types of bionic robots or drivers using shape memory alloys. The existing shape memory alloy driver mainly uses shape memory alloy wire or coil spring as the driving element: the wire has a large output and high efficiency, but the stroke is small; the coil spring has a large stroke, but the efficiency is low, and the output is small. How to design a high-efficiency shape memory alloy actuator with both output and stroke has urgent practical needs and great application prospects.

液压驱动系统是一种成熟的工业技术,通常包括动力元件(液压泵),执行元件,控制元件,辅助元件及液压油等。如果采用形状记忆合金来驱动液压泵,则一方面可以大大简化液压泵的结构,另一方面又可以利用现有液压系统的相关成熟技术来改善形状记忆合金的驱动性能。有鉴于此,专利申请“运用形状记忆合金的液压泵”(申请号CN95196561.1),以及“一种液压装置及其用途”(申请号CN00132784.4)都分别涉及了形状记忆合金驱动液压泵的这一想法。这两项申请中,动力元件的设计思路基本一致,即是利用一组形状记忆合金元件和一组弹性元件组成偏动式驱动器,形状记忆合金元件受热时收缩,压缩弹性元件,带动活塞完成吸油动作;形状记忆合金冷却时,弹性元件恢复,拉长形状记忆合金元件,并带动活塞完成排油动作。The hydraulic drive system is a mature industrial technology, which usually includes power components (hydraulic pumps), actuators, control components, auxiliary components and hydraulic oil. If the shape memory alloy is used to drive the hydraulic pump, on the one hand, the structure of the hydraulic pump can be greatly simplified, and on the other hand, the relevant mature technology of the existing hydraulic system can be used to improve the driving performance of the shape memory alloy. In view of this, the patent application "Hydraulic pump using shape memory alloy" (application number CN95196561.1), and "a hydraulic device and its use" (application number CN00132784.4) both involve shape memory alloy driven hydraulic pumps. of this idea. In these two applications, the design idea of the power element is basically the same, that is, a set of shape memory alloy elements and a set of elastic elements are used to form a bias drive. When the shape memory alloy element is heated, it shrinks and compresses the elastic element to drive the piston to complete oil absorption. Action: When the shape memory alloy is cooled, the elastic element recovers, elongates the shape memory alloy element, and drives the piston to complete the oil discharge action.

现有形状记忆合金液压泵的特点在于只具有单向驱动做功能力,而许用场合如仿生机器人等,则希望其具有双向的做功能力;另外,偏动装置中的弹性元件的出力必须介于形状记忆合金元件的高出力和低出力之间,驱动力(形状记忆合金元件高出力减去弹性元件出力,或者弹性元件出力减去形状记忆合金元件低出力)必然小于形状记忆合金元件高出力和低出力的差,形状记忆合金材料的驱动潜能还没有完全发挥。The characteristic of the existing shape memory alloy hydraulic pump is that it only has the ability to drive in one direction, but it is hoped that it has the ability to work in two directions in permitted occasions such as bionic robots; in addition, the output of the elastic element in the biasing device must be Between the high output force and the low output force of the shape memory alloy element, the driving force (the high output force of the shape memory alloy element minus the output force of the elastic element, or the output force of the elastic element minus the low output force of the shape memory alloy element) must be less than the high output force of the shape memory alloy element. Due to the difference between output and low output, the driving potential of shape memory alloy materials has not been fully realized.

实用新型内容Utility model content

本实用新型的目的是提供一种高效的,具有双向驱动做功能力的形状记忆合金液压泵。The purpose of the utility model is to provide a high-efficiency shape-memory alloy hydraulic pump with two-way driving capability.

为达到上述目的,本实用新型采用的技术方案为:一种利用形状记忆合金驱动的液压泵,包括固定支架、第一液压泵体、第二液压泵体、双头活塞、第一组形状记忆合金元件、第二组形状记忆合金元件、第一组加热器和第二组加热器;其中,In order to achieve the above purpose, the technical solution adopted by the utility model is: a hydraulic pump driven by a shape memory alloy, including a fixed bracket, a first hydraulic pump body, a second hydraulic pump body, a double-headed piston, a first set of shape memory Alloy elements, a second set of shape memory alloy elements, a first set of heaters and a second set of heaters; wherein,

双头活塞在轴向可以分为三个部分,双头活塞两端各有一个活塞头,双头活塞中间有突出的法兰盘可以与两侧的第一组形状记忆合金元件的一端、第二组形状记忆合金元件的一端分别固定连接;The double-headed piston can be divided into three parts in the axial direction. There is a piston head at each end of the double-headed piston. There is a protruding flange in the middle of the double-headed piston. One ends of the two sets of shape memory alloy elements are respectively fixedly connected;

第一液压泵体、第二液压泵体中每个液压泵体的一端为开口端,第一液压泵体的开口端与第二液压泵体的开口端相对,双头活塞的两个活塞头分别与第一液压泵体、第二液压泵体的开口端的内表面配合,每个液压泵体的另一端的中间有一个油口,每个液压泵体在具有油口的这一端的油口周围还有法兰盘,第一液压泵体的该法兰盘和第二液压泵体的该法兰盘均用于安装固定支架,以及第一液压泵体的该法兰盘用于安装第一组形状记忆合金元件的另一端,第二液压泵体的该法兰盘用于安装第二组形状记忆合金元件的另一端;One end of each hydraulic pump body in the first hydraulic pump body and the second hydraulic pump body is an open end, the open end of the first hydraulic pump body is opposite to the open end of the second hydraulic pump body, and the two piston heads of the double-headed piston Cooperate with the inner surface of the opening end of the first hydraulic pump body and the second hydraulic pump body respectively. There is an oil port in the middle of the other end of each hydraulic pump body, and the oil port at the end of each hydraulic pump body has the oil port. There is also a flange around the body, the flange of the first hydraulic pump body and the flange of the second hydraulic pump body are used to install the fixing bracket, and the flange of the first hydraulic pump body is used to install the second hydraulic pump body The other end of a group of shape memory alloy elements, the flange of the second hydraulic pump body is used to install the other end of the second group of shape memory alloy elements;

第一组形状记忆合金元件、第二组形状记忆合金元件均为拉伸元件;The first group of shape memory alloy elements and the second group of shape memory alloy elements are tensile elements;

第一组加热器包覆在第一组形状记忆合金元件的表面,第二组加热器包覆在第二组形状记忆合金元件的表面。The first group of heaters is covered on the surface of the first group of shape memory alloy elements, and the second group of heaters is covered on the surface of the second group of shape memory alloy elements.

其中,该液压泵还包括紧固件,该紧固件用于紧固固定支架、第一组形状记忆合金元件和第二组形状记忆合金元件。Wherein, the hydraulic pump further includes fasteners, which are used to fasten the fixing bracket, the first set of shape memory alloy elements and the second set of shape memory alloy elements.

其中,所述的拉伸元件可以是丝材、带材、绞线或者棒材,在安装前,要先经历一定的预拉伸,安装时一端固定在一个液压泵体的法兰盘上,另一端和双头活塞的法兰盘连接。Wherein, the tensile element can be a wire, a strip, a stranded wire or a rod, and it must undergo a certain pre-stretching before installation, and one end is fixed on a flange of a hydraulic pump body during installation. The other end is connected with the flange of the double-ended piston.

其中,第一组加热器和第二组加热器具体的可采用电阻加热,感应电流加热或其它现有的加热方式。Wherein, the first group of heaters and the second group of heaters can specifically adopt resistance heating, induction current heating or other existing heating methods.

本实用新型优点和积极效果为:The utility model advantage and positive effect are:

本装置结构简单,原理清晰。形状记忆合金元件受力为纯拉伸,材料利用效率高。使用两组形状记忆合金元件,实现双向反复驱动。和液压系统复合,可以利用液压系统的各种成熟技术,具有通用性。尤其适合于各类仿生机器人的运动驱动。The device has simple structure and clear principle. The force of the shape memory alloy element is pure tension, and the material utilization efficiency is high. Two sets of shape memory alloy elements are used to realize bidirectional repeated driving. Combined with the hydraulic system, various mature technologies of the hydraulic system can be used, and it has versatility. It is especially suitable for the motion drive of various bionic robots.

附图说明Description of drawings

图1为利用形状记忆合金驱动的液压泵的结构示意图;Fig. 1 is a schematic structural diagram of a hydraulic pump driven by a shape memory alloy;

图2为与该液压泵配合使用的双作用执行液压缸;Figure 2 is a double-acting executive hydraulic cylinder used in conjunction with the hydraulic pump;

图3为与该液压泵配合使用的单作用执行液压缸;Figure 3 is a single-acting executive hydraulic cylinder used in conjunction with the hydraulic pump;

图中附图标记含义为:1-固定支架,2A-第一液压泵体,2B-第二液压泵体,21A-第一液压泵体的油口,21B-第二液压泵体的油口,3-双头活塞,31A-双头活塞的第一活塞头,31B-双头活塞的第二活塞头,4A-第一组形状记忆合金元件,4B-第二组形状记忆合金元件,5A-第一组加热器,5B-第二组加热器,6-紧固件,7-单作用执行液压缸活塞,7#-双作用执行液压缸活塞,8-单作用执行液压缸油口,8A-双作用执行液压缸第一油口,8B-双作用执行液压缸第二油口,9-弹簧。The meanings of reference signs in the figure are: 1-fixed bracket, 2A-first hydraulic pump body, 2B-second hydraulic pump body, 21A-oil port of first hydraulic pump body, 21B-oil port of second hydraulic pump body , 3-double-headed piston, 31A-the first piston head of the double-headed piston, 31B-the second piston head of the double-headed piston, 4A-the first set of shape memory alloy elements, 4B-the second set of shape memory alloy elements, 5A -The first set of heaters, 5B-the second set of heaters, 6-fasteners, 7-piston of single-acting hydraulic cylinder, 7#-piston of double-acting hydraulic cylinder, 8-oil port of single-acting hydraulic cylinder, 8A-the first port of the double-acting hydraulic cylinder, 8B-the second port of the double-acting hydraulic cylinder, 9-spring.

具体实施方式detailed description

下面结合附图以及具体实施方式进一步说明本实用新型。Further illustrate the utility model below in conjunction with accompanying drawing and specific embodiment.

如图1,本实用新型一种利用形状记忆合金驱动的液压泵,包含固定支架1一套,第一液压泵体2A,第二液压泵体2B,双头活塞3,第一组形状记忆合金元件4A,第二组形状记忆合金元件4B,第一组加热器5A,第二组加热器5B及紧固件6等部分。As shown in Figure 1, the utility model is a hydraulic pump driven by shape memory alloy, which includes a set of fixed bracket 1, a first hydraulic pump body 2A, a second hydraulic pump body 2B, a double-headed piston 3, and a first set of shape memory alloy Element 4A, the second group of shape memory alloy elements 4B, the first group of heaters 5A, the second group of heaters 5B and fasteners 6 and other parts.

双头活塞3在轴向可以分为三个部分,两端各有一个活塞头31A、31B,活塞头31A、31B分别与第一液压泵体2A、第二液压泵体2B的对应部分配合,中间有突出的法兰盘可以与两侧的第一组形状记忆合金元件4A,第二组形状记忆合金元件4B连接固定。The double-headed piston 3 can be divided into three parts in the axial direction, each with a piston head 31A, 31B at both ends, and the piston heads 31A, 31B cooperate with the corresponding parts of the first hydraulic pump body 2A and the second hydraulic pump body 2B respectively, The protruding flange in the middle can be connected and fixed with the first group of shape memory alloy elements 4A and the second group of shape memory alloy elements 4B on both sides.

第一液压泵体2A,第二液压泵体2B的一端为开口端,其内表面分别与双头活塞3的活塞头31A和活塞头31B配合,另一端的中间分别有一个油口21A和油口21B,在油口21A的这一端周围有安装固定支架1、第一组形状记忆合金元件4A的法兰盘,油口21B的这一端周围有安装固定支架1、第二组形状记忆合金元件4B的法兰盘。第一液压泵体2A及第二液压泵体2B安装在同一套固定支架1上,开口端相对。One end of the first hydraulic pump body 2A and the second hydraulic pump body 2B is an open end, the inner surfaces of which are respectively matched with the piston head 31A and the piston head 31B of the double-headed piston 3, and there is an oil port 21A and an oil port in the middle of the other end respectively. Port 21B, around this end of oil port 21A, there are mounting brackets 1 and flanges for the first group of shape memory alloy elements 4A, and around this end of oil port 21B, there are mounting brackets 1 and a second group of shape memory alloy elements 4B flange. The first hydraulic pump body 2A and the second hydraulic pump body 2B are mounted on the same set of fixed brackets 1 , with their open ends facing each other.

第一组形状记忆合金元件4A、第二组形状记忆合金元件4B为拉伸元件,可以是丝材、带材、绞线或者棒材,在安装前,要先经历一定的预拉伸,安装时一端分别固定在第一液压泵体2A,第二液压泵体2B的法兰盘上,一端和双头活塞3的法兰盘连接。The first group of shape-memory alloy elements 4A and the second group of shape-memory alloy elements 4B are tensile elements, which can be wires, strips, strands or rods. Before installation, they must first undergo a certain pre-stretching. One end is respectively fixed on the flange of the first hydraulic pump body 2A and the second hydraulic pump body 2B, and one end is connected with the flange of the double-headed piston 3 .

第一组加热器5A、第二组加热器5B分别包覆在第一组形状记忆合金元件4A、第二组形状记忆合金元件4B的表面,具体的可采用电阻加热,感应电流加热或其它现有的加热方式。The first group of heaters 5A and the second group of heaters 5B are respectively coated on the surfaces of the first group of shape memory alloy elements 4A and the second group of shape memory alloy elements 4B. Specifically, resistance heating, induction current heating or other methods can be used. Some heating methods.

该形状记忆合金驱动的液压泵,一般需要配合双作用执行液压缸使用,如图2。双作用执行液压缸一端有一个油口8A,另一端有一个油口8B,油口8A、油口8B分别通过管道和第一液压泵体2A的油口21A和第二液压泵体2B的油口21B连接。双作用执行液压缸活塞7#在两个油口8A、8B之间运动,并且双作用执行液压缸活塞7#两侧的有效面积之比等于双头活塞3的两侧有效面积比。使用时,首先连接好管道,确保所有腔体都被充满液压油,并且密封。初始时,环境温度低于马氏体向奥氏体相变的起始温度,两组形状记忆合金元件4A,4B均处于低出力状态。例如,通过第一组加热器5A对第一组形状记忆合金元件4A加热,第一组形状记忆合金元件4A升温、相变并发生收缩,转变成高出力状态,因此可以拉长第二组形状记忆合金元件4B并带动双头活塞3往A侧移动,促使该侧的第一液压泵体2A中的液压油从油口21A排出,通过连接管道,从双作用执行液压缸的油口8A进入,推动双作用执行液压缸活塞7#往一侧移动,实现驱动功能;于此同时,双作用执行液压缸活塞7#另一侧的部分液压油通过油口8B,连接管道及油口21B回流到第二液压泵体2B内。停止第一组加热器5A,第一组形状记忆合金元件4A冷却到初始低出力状态,再由第二组加热器5B对第二组形状记忆合金元件4B加热,实现反向驱动。重复上述过程,则可实现连续往复驱动。The hydraulic pump driven by the shape memory alloy generally needs to be used with a double-acting hydraulic cylinder, as shown in Figure 2. There is an oil port 8A at one end of the double-acting executive hydraulic cylinder, and an oil port 8B at the other end. The oil port 8A and the oil port 8B pass through the pipeline and the oil port 21A of the first hydraulic pump body 2A and the oil of the second hydraulic pump body 2B respectively. port 21B connection. The piston 7# of the double-acting hydraulic cylinder moves between the two oil ports 8A and 8B, and the ratio of the effective areas on both sides of the piston 7# of the double-acting hydraulic cylinder is equal to the ratio of the effective areas on both sides of the double-headed piston 3 . When in use, first connect the pipes to ensure that all cavities are filled with hydraulic oil and sealed. Initially, the ambient temperature is lower than the initiation temperature of the transformation from martensite to austenite, and the two sets of shape memory alloy elements 4A and 4B are in a low output state. For example, the first group of shape-memory alloy elements 4A are heated by the first group of heaters 5A, the first group of shape-memory alloy elements 4A heat up, phase change and shrink, and transform into a state of high output force, so the shape of the second group can be elongated The memory alloy element 4B drives the double-headed piston 3 to move to the A side, prompting the hydraulic oil in the first hydraulic pump body 2A on this side to discharge from the oil port 21A, and enter from the oil port 8A of the double-acting hydraulic cylinder through the connecting pipeline. , to push the piston 7# of the double-acting hydraulic cylinder to move to one side to realize the driving function; at the same time, part of the hydraulic oil on the other side of the piston 7# of the double-acting hydraulic cylinder passes through the oil port 8B, and the connecting pipe and oil port 21B return to the second hydraulic pump body 2B. Stop the first group of heaters 5A, the first group of shape memory alloy elements 4A is cooled to the initial low output state, and then the second group of shape memory alloy elements 4B is heated by the second group of heaters 5B to realize reverse driving. By repeating the above process, continuous reciprocating drive can be realized.

该利用形状记忆合金驱动的液压泵,可以同时驱动多个双作用执行液压缸。各个双作用执行液压缸活塞7#两侧有效面积和的比值,要等于与之联通的的液压泵双头活塞3两侧的有效面积比。The hydraulic pump driven by the shape memory alloy can simultaneously drive multiple double-acting hydraulic cylinders. The ratio of the sum of the effective areas on both sides of the piston 7# of each double-acting hydraulic cylinder must be equal to the ratio of the effective areas on both sides of the double-headed piston 3 of the hydraulic pump connected thereto.

其它实施例:该利用形状记忆合金驱动的液压泵,还可以配合单作用执行液压缸使用,如图3所示。单作用执行液压缸只有一个油口8,单作用执行液压缸活塞7复位需依靠弹簧9或者重力作用。使用时,连接某一个液压泵体如液压泵体2A的油口21A和单作用执行液压缸油口8,并将其充满液压油,另一个液压泵体2B内部不充油。交替对两组形状记忆合金元件4A,4B加热,即可实现单作用执行液压缸的动作和回位。显然,该利用形状记忆合金驱动的液压泵,也可以同时驱动多个单作用执行液压缸,此处不再赘述。Other embodiments: the hydraulic pump driven by a shape memory alloy can also be used in conjunction with a single-acting hydraulic cylinder, as shown in FIG. 3 . The single-acting hydraulic cylinder has only one oil port 8, and the reset of the piston 7 of the single-acting hydraulic cylinder depends on the spring 9 or gravity. During use, connect a certain hydraulic pump body such as the oil port 21A of the hydraulic pump body 2A and the oil port 8 of the single-acting hydraulic cylinder, and fill it with hydraulic oil, while the other hydraulic pump body 2B is not filled with oil. Alternately heating the two sets of shape memory alloy elements 4A, 4B can realize the action and return of the single-acting executive hydraulic cylinder. Apparently, the hydraulic pump driven by the shape memory alloy can also simultaneously drive multiple single-acting hydraulic cylinders, which will not be repeated here.

Claims (4)

1. A hydraulic pump driven by a shape memory alloy, characterized in that: the hydraulic pump comprises a fixed support (1), a first hydraulic pump body (2A), a second hydraulic pump body (2B), a double-head piston (3), a first group of shape memory alloy elements (4A), a second group of shape memory alloy elements (4B), a first group of heaters (5A) and a second group of heaters (5B); wherein,
the double-end piston (3) can be divided into three parts in the axial direction, two ends of the double-end piston (3) are respectively provided with a piston head, and a protruding flange plate is arranged in the middle of the double-end piston (3) and can be respectively and fixedly connected with one end of a first group of shape memory alloy elements (4A) and one end of a second group of shape memory alloy elements (4B) at two sides;
one end of each of the first hydraulic pump body (2A) and the second hydraulic pump body (2B) is an open end, the open end of the first hydraulic pump body (2A) is opposite to the open end of the second hydraulic pump body (2B), two piston heads of the double-head piston (3) are respectively matched with the inner surfaces of the open ends of the first hydraulic pump body (2A) and the second hydraulic pump body (2B), an oil port is arranged in the middle of the other end of each hydraulic pump body, a flange plate is arranged around the oil port at the end with the oil port on each hydraulic pump body, the flange plate of the first hydraulic pump body (2A) and the flange plate of the second hydraulic pump body (2B) are used for installing a fixed support (1), and the flange of the first hydraulic pump body (2A) is used for mounting the other end of the first group of shape memory alloy elements (4A), and the flange of the second hydraulic pump body (2B) is used for mounting the other end of the second group of shape memory alloy elements (4B);
the first group of shape memory alloy elements (4A) and the second group of shape memory alloy elements (4B) are all stretching elements;
the first group of heaters (5A) covers the surface of the first group of shape memory alloy elements (4A), and the second group of heaters (5B) covers the surface of the second group of shape memory alloy elements (4B).
2. The hydraulic pump driven by the shape memory alloy as set forth in claim 1, wherein: the hydraulic pump further comprises a fastener (6), the fastener (6) being used to fasten the stationary support (1), the first set of shape memory alloy elements (4A) and the second set of shape memory alloy elements (4B).
3. The hydraulic pump driven by the shape memory alloy as set forth in claim 1, wherein: the stretching element can be wire material, strip material, stranded wire or bar material, before installation, a certain pretension is needed, one end of the stretching element is fixed on a flange of a hydraulic pump body, and the other end of the stretching element is connected with the flange of the double-head piston.
4. The hydraulic pump driven by the shape memory alloy as set forth in claim 1, wherein: the first group of heaters (5A) and the second group of heaters (5B) can adopt resistance heating, induction current heating or other existing heating modes.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105822519A (en) * 2016-04-29 2016-08-03 中国科学技术大学 Hydraulic pump driven by utilizing shape memory alloy and use method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105822519A (en) * 2016-04-29 2016-08-03 中国科学技术大学 Hydraulic pump driven by utilizing shape memory alloy and use method thereof

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