CN205605376U - Utilize shape memory alloy driven hydraulic pump - Google Patents
Utilize shape memory alloy driven hydraulic pump Download PDFInfo
- Publication number
- 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
- Authority
- CN
- China
- Prior art keywords
- shape memory
- memory alloy
- hydraulic pump
- group
- pump body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 91
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 230000006698 induction Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000011664 nicotinic acid Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000008859 change Effects 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 27
- 239000010720 hydraulic oil Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 229910000734 martensite Inorganic materials 0.000 description 5
- 229910001566 austenite Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000003592 biomimetic effect Effects 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Reciprocating Pumps (AREA)
Abstract
The utility model discloses an utilize shape memory alloy driven hydraulic pump, this hydraulic pump include that fixed bolster (1), the first hydraulic pressure pump body (2A), the second hydraulic pressure pump body (2B), double -end piston (3), the first shape memory alloy of group component (4A), second group shape memory alloy component (4B), first group heater (5A), second organize heater (5B) and fastener (6). Do benefit to the heater and in turn to the heating of two sets of shape memory alloy components, control the shape memory alloy leement duration and change, drive the round trip movement of double -end piston, realize two -way drive effect. This device simple structure, the principle is clear. Shape memory alloy component atress is the pure extension, and the material utilization efficiency is high. It is compound with hydraulic system, can utilize hydraulic system's various mature technique, have the commonality. Especially, the motion drive who is suitable for all kinds of bionic robot.
Description
Technical Field
The utility model relates to a technical field of hydraulic pump especially relates to an utilize shape memory alloy driven hydraulic pump.
Background
The shape memory alloy is an intelligent material with wider application, the deformation is controlled by the stress and the temperature, and the physical substance is the thermal elastic martensite phase transformation. When the temperature of the material is lower than the initial temperature of the transformation from martensite to austenite, the material is in a martensite phase state, the bearing capacity of the material is low, and the material is easy to deform under the action of external force; and the deformed martensite phase material is heated until the temperature is higher than the finishing temperature point of the martensite-austenite phase transformation, the material is reversely transformed into the austenite phase and recovers the former shape, and meanwhile, the material can bear larger load and do work outwards. This is the well-known shape memory effect, and its driving principle. By utilizing the principle of the shape memory alloy, mature products such as a shape memory alloy pipe joint, a shape memory alloy space unlocking device and the like are developed and are widely applied.
On the other hand, the robot industry, especially the field of the bionic robot, is developing vigorously, and there is a very vigorous demand for various actuators. The shape memory alloy driver has the advantages of simple structure, convenient control, large output power and the like, is concerned greatly, and occupies an important place in the field of robot driving. Various patent applications (application No. cn201210044542.x, application No. CN201210041105.2, application No. CN201320458623.4, application No. CN201410353149.8, application No. CN201510440930.3, etc.) describe various types of biomimetic robots or actuators using shape memory alloys. The existing shape memory alloy drivers mainly use shape memory alloy wire or coil springs as driving elements: the output of the wire is large, the efficiency is high, but the stroke is small; the travel of the spiral spring is large, but the efficiency is low, and the output force is small. How to give consideration to the force and the stroke and design a high-efficiency shape memory alloy driver, has urgent practical requirements and great application prospects.
The hydraulic drive system is a mature industrial technology, and generally comprises a power element (hydraulic pump), an actuator, a control element, an auxiliary element, hydraulic oil and the like. If the shape memory alloy is used for driving the hydraulic pump, on one hand, the structure of the hydraulic pump can be greatly simplified, and on the other hand, the driving performance of the shape memory alloy can be improved by utilizing the related mature technology of the existing hydraulic system. In view of the above, the patent application "hydraulic pump using shape memory alloy" (application No. CN95196561.1), and "a hydraulic device and its application" (application No. CN00132784.4) all relate to the idea that the shape memory alloy drives the hydraulic pump. In the two applications, the design ideas of the power elements are basically consistent, namely a group of shape memory alloy elements and a group of elastic elements are utilized to form a biasing type driver, and the shape memory alloy elements contract when heated to compress the elastic elements to drive the piston to complete the oil absorption action; when the shape memory alloy cools, the elastic element recovers, the shape memory alloy element is stretched, and the piston is driven to complete the oil discharging action.
The existing shape memory alloy hydraulic pump is characterized in that the existing shape memory alloy hydraulic pump only has one-way driving working capacity, and the allowable occasions such as a bionic robot and the like hope that the existing shape memory alloy hydraulic pump has two-way working capacity; in addition, the force exerted by the elastic element in the biasing device must be between the high force and the low force exerted by the shape memory alloy element, the driving force (the high force exerted by the shape memory alloy element minus the force exerted by the elastic element, or the force exerted by the elastic element minus the low force exerted by the shape memory alloy element) must be less than the difference between the high force and the low force exerted by the shape memory alloy element, and the driving potential of the shape memory alloy material is not fully developed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an efficient shape memory alloy hydraulic pump with two-way drive acting capacity.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a hydraulic pump driven by shape memory alloy comprises a fixed support, a first hydraulic pump body, a second hydraulic pump body, a double-head piston, a first group of shape memory alloy elements, a second group of shape memory alloy elements, a first group of heaters and a second group of heaters; wherein,
the double-head piston can be divided into three parts in the axial direction, two ends of the double-head piston are respectively provided with a piston head, and a protruding flange plate is arranged in the middle of the double-head piston and can be respectively and fixedly connected with one end of the first group of shape memory alloy elements and one end of the second group of shape memory alloy elements on two sides;
one end of each of 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, two piston heads of the double-head piston are respectively matched with the inner surfaces of the open ends of the first hydraulic pump body and the second hydraulic pump body, an oil port is arranged in the middle of the other end of each hydraulic pump body, a flange is arranged around the oil port of the end with the oil port of each hydraulic pump body, the flange of the first hydraulic pump body and the flange of the second hydraulic pump body are used for installing a fixed support, the flange of the first hydraulic pump body is used for installing the other end of the first group of shape memory alloy elements, and the flange of the second hydraulic pump body is used for installing the other end of the second group of shape memory alloy elements;
the first group of shape memory alloy elements and the second group of shape memory alloy elements are all stretching elements;
the first group of heaters is coated on the surface of the first group of shape memory alloy elements, and the second group of heaters is coated on the surface of the second group of shape memory alloy elements.
Wherein the hydraulic pump further comprises a fastener for fastening the stationary support, the first set of shape memory alloy elements and the second set of shape memory alloy elements.
The tensile element can be wire material, strip material, stranded wire or bar material, and is undergone the process of certain prestretching before installation, and when the tensile element is installed, one end of the tensile element is fixed on the flange plate of a hydraulic pump body, and its another end is connected with flange plate of double-head piston.
The first group of heaters and the second group of heaters can adopt resistance heating, induction current heating or other existing heating modes.
The utility model discloses the advantage does with positive effect:
the device has simple structure and clear principle. The shape memory alloy element is stressed to be pure tension, and the material utilization efficiency is high. Two groups of shape memory alloy elements are used to realize bidirectional repeated driving. The hydraulic system is combined with the hydraulic system, various mature technologies of the hydraulic system can be utilized, and the universality is realized. Is particularly suitable for the motion driving of various bionic robots.
Drawings
FIG. 1 is a schematic view of a hydraulic pump driven by a shape memory alloy;
FIG. 2 is a double acting actuator cylinder used in conjunction with the hydraulic pump;
FIG. 3 is a single-acting implement hydraulic cylinder used in conjunction with the hydraulic pump;
the reference numbers in the figures mean: 1-a fixed support, 2A-a first hydraulic pump body, 2B-a second hydraulic pump body, 21A-an oil port of the first hydraulic pump body, 21B-an oil port of the second hydraulic pump body, 3-a double-headed piston, 31A-a first piston head of the double-headed piston, 31B-a second piston head of the double-headed piston, 4A-a first group of shape memory alloy elements, 4B-a second group of shape memory alloy elements, 5A-a first group of heaters, 5B-a second group of heaters, 6-a fastener, 7-a single-action execution hydraulic cylinder piston, 7# -a double-action execution hydraulic cylinder piston, 8-a single-action execution hydraulic cylinder oil port, 8A-a first oil port of the double-action execution hydraulic cylinder, 8B-a second oil port of the double-action execution hydraulic cylinder, and 9-.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, the utility model relates to an utilize shape memory alloy driven hydraulic pump contains fixed bolster 1 one set, the first hydraulic pump body 2A, the second hydraulic pump body 2B, double-end piston 3, the first shape memory alloy component 4A of group, the second shape memory alloy component 4B of group, the first heater 5A of group, the second heater 5B of group and fastener 6 parts such as.
The double-ended piston 3 can be divided into three parts in the axial direction, two ends of the double-ended piston are respectively provided with a piston head 31A and a piston head 31B, the piston heads 31A and the piston heads 31B are respectively matched with corresponding parts of the first hydraulic pump body 2A and the second hydraulic pump body 2B, and a protruding flange plate is arranged in the middle of the double-ended piston and 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 two sides.
One end of the first hydraulic pump body 2A and one end of the second hydraulic pump body 2B are open ends, the inner surfaces of the first hydraulic pump body and the second hydraulic pump body are respectively matched with a piston head 31A and a piston head 31B of the double-head piston 3, an oil port 21A and an oil port 21B are respectively arranged in the middle of the other end of the first hydraulic pump body and the second hydraulic pump body, a flange for installing the fixing support 1 and the first group of shape memory alloy elements 4A is arranged around the end of the oil port 21A, and a flange for installing the fixing support 1 and the second group of shape memory alloy elements 4B is arranged. The first hydraulic pump body 2A and the second hydraulic pump body 2B are arranged on the same set of fixed support 1, and the opening ends are opposite.
The first group of shape memory alloy elements 4A and the second group of shape memory alloy elements 4B are stretching elements which can be wires, strips, stranded wires or bars, and are subjected to certain pre-stretching before installation, one ends of the stretching elements are respectively fixed on the flange plates of the first hydraulic pump body 2A and the second hydraulic pump body 2B, and the other ends of the stretching elements are connected with the flange plates of the double-head piston 3.
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, and the specific heating mode can be resistance heating, induction current heating or other existing heating modes.
The shape memory alloy driven hydraulic pump is generally used in conjunction with a double acting hydraulic cylinder, as shown in fig. 2. One end of the double-acting execution hydraulic cylinder is provided with an oil port 8A, the other end of the double-acting execution hydraulic cylinder is provided with an oil port 8B, and the oil port 8A and the oil port 8B are respectively connected with an oil port 21A of the first hydraulic pump body 2A and an oil port 21B of the second hydraulic pump body 2B through pipelines. The double-acting actuator cylinder piston 7# moves between the two oil ports 8A, 8B, and the ratio of the effective areas on both sides of the double-acting actuator cylinder piston 7# is equal to the ratio of the effective areas on both sides of the double-headed piston 3. When the hydraulic oil-filled type hydraulic oil-filled pipeline is used, the pipeline is connected at first, all cavities are filled with hydraulic oil, and the cavities are sealed. Initially, the ambient temperature is below the onset temperature of the martensite to austenite phase transition, and both sets of shape memory alloy elements 4A, 4B are in a low-force 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, change phase and contract, and are converted into a high-output state, so that the second group of shape memory alloy elements 4B can be elongated and drive the double-headed piston 3 to move to the side a, hydraulic oil in the first hydraulic pump body 2A of the side is driven to be discharged from the oil port 21A, and enters from the oil port 8A of the double-acting execution hydraulic cylinder through a connecting pipeline, and the piston 7# of the double-acting execution hydraulic cylinder is driven to move to one side, so that a driving function is realized; meanwhile, part of the hydraulic oil on the other side of the double-acting execution hydraulic cylinder piston 7# flows back into the second hydraulic pump body 2B through the oil port 8B, the connecting pipeline and the oil port 21B. The first set of heaters 5A is stopped, the first set of shape memory alloy elements 4A is cooled to an initial low force state, and the second set of shape memory alloy elements 4B is heated by the second set of heaters 5B to achieve back drive. By repeating the above process, continuous reciprocating driving can be realized.
The hydraulic pump driven by the shape memory alloy can drive a plurality of double-acting execution hydraulic cylinders simultaneously. The ratio of the effective area of the two sides of each double-acting execution hydraulic cylinder piston 7# is equal to the effective area ratio of the two sides of the hydraulic pump double-head piston 3 communicated with the double-acting execution hydraulic cylinder piston.
Other examples are as follows: the hydraulic pump driven by the shape memory alloy can also be used with a single-acting execution hydraulic cylinder, as shown in fig. 3. The single-action execution hydraulic cylinder is only provided with one oil port 8, and the piston 7 of the single-action execution hydraulic cylinder needs to be reset under the action of a spring 9 or gravity. When the hydraulic pump is used, the oil port 21A of one hydraulic pump body such as the hydraulic pump body 2A and the oil port 8 of the single-action execution hydraulic cylinder are connected and filled with hydraulic oil, and the inside of the other hydraulic pump body 2B is not filled with oil. The two groups of shape memory alloy elements 4A and 4B are heated alternately, so that the action and the return of the single-action execution hydraulic cylinder can be realized. Obviously, the hydraulic pump driven by the shape memory alloy can also drive a plurality of single-acting execution hydraulic cylinders simultaneously, and the description is omitted 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620397125.7U CN205605376U (en) | 2016-04-29 | 2016-04-29 | Utilize shape memory alloy driven hydraulic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620397125.7U CN205605376U (en) | 2016-04-29 | 2016-04-29 | Utilize shape memory alloy driven hydraulic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205605376U true CN205605376U (en) | 2016-09-28 |
Family
ID=56968376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620397125.7U Active CN205605376U (en) | 2016-04-29 | 2016-04-29 | Utilize shape memory alloy driven hydraulic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205605376U (en) |
Cited By (1)
| 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 |
-
2016
- 2016-04-29 CN CN201620397125.7U patent/CN205605376U/en active Active
Cited By (1)
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105822519B (en) | A kind of hydraulic pump and its application method using marmem driving | |
| CN101386136B (en) | Self locking device for clamping articles | |
| CN106989131B (en) | SMA wire split sleeve large-stroke active adjustment damper | |
| CN102889188B (en) | The bidirectional linear actuator of Shape-based interpolation memory material actuator | |
| US20140086772A1 (en) | Actuator element and an actuator for generating a force and/or a movement | |
| JPH11501387A (en) | Air-oil converter for energy storage | |
| CN205605376U (en) | Utilize shape memory alloy driven hydraulic pump | |
| CN101865176A (en) | Bidirectional multi-action hydraulic cylinder with single piston rod | |
| WO2016097214A1 (en) | Heat transfer in an energy recovery device | |
| JP2019522152A (en) | Piezoelectric hydraulic actuator | |
| CN209621534U (en) | Vibration generating device | |
| CN103317521A (en) | Electric push rod drive controlled flexible gripper with plate spring frameworks | |
| CN101693357A (en) | Clamping device based on shape memory alloy (SMA) drive | |
| CN208778382U (en) | A kind of hydraulic cylinder facilitating lubrication | |
| CN202867118U (en) | Both-way linear actuator based on shape memory material actuator | |
| CN114517539A (en) | Bidirectional limiting type SMA spring friction composite damper | |
| CN210476956U (en) | Robot arm based on shape memory alloy drive | |
| CN112072950A (en) | Jumping type robot and control method thereof | |
| CN201500949U (en) | Holding device based on shape memory alloy actuator | |
| CN102581633A (en) | Double toggle rod self-locking clamping device | |
| CN100478565C (en) | Shape memory alloy reciprocating type displacement multiply output mechanism | |
| CN108757357B (en) | Laser-induced liquid metal cooperated shape memory alloy driving device | |
| CN103331761B (en) | The flexible paw of series connection leaf hinge of electric pushrod drived control | |
| CN207740127U (en) | A kind of shape memory alloy displacement superposition amplification driving mechanism | |
| CN101839268B (en) | Numerical control hydraulic power unit based on magnetic control shape memory alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |