CN203879700U - End face cam type micro-flow plunger pump driven by stepping motor - Google Patents
End face cam type micro-flow plunger pump driven by stepping motor Download PDFInfo
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- CN203879700U CN203879700U CN201420258843.7U CN201420258843U CN203879700U CN 203879700 U CN203879700 U CN 203879700U CN 201420258843 U CN201420258843 U CN 201420258843U CN 203879700 U CN203879700 U CN 203879700U
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Abstract
Discloses is an end face cam type micro-flow plunger pump driven by a stepping motor. A pump end face is mounted on the left side of a pump body, the front end of a step-type plunger is closely matched with a plunger hole through a sealing valve, the stepping motor is connected with the rear end of a driving end face cam shaft through a transmission shaft, the tail end of the rear end of the step-type plunger is of an end face cam structure corresponding to the front end of the driving end face cam shaft, and a spring is arranged outside the front end of the step-type plunger between the rear end of the step-type plunger and the pump body; the rear end of the step-type plunger and the front end of the driving end face cam shaft are closely connected through a spherical ball, the rear end of the step-type plunger is connected with the pump body, and a communicating groove corresponding to the end face cam structure is formed in the driving end face cam shaft; the communicating groove and a contact position of the step-type plunger have a corresponding relationship in the process of liquid absorbing and discharging and in the process of rotating of the driving end face cam shaft, an external liquid-absorbing pipeline is communicated with a pump cavity while a liquid discharging pipeline is isolated from the pump cavity during liquid absorbing, and vice versa. The end face cam type micro-flow plunger pump has the advantages of controllable flowing speed range and high flowing speed accuracy.
Description
Technical field
The utility model relates to the key components and parts in solution chemistry component analysis field in medical apparatus, is specifically related to a kind of stepper motor driven end surface cam type micrometeor plunger pump.
Background technique
In recent years, chromatograph technology had a great development, and can be applied to environmental analysis, food and drink analysis, and combination analysis etc.As the quick and precisely a kind of and analytical method that produces effect, chromatographic application is more and more extensive.Wherein, liquid chromatograph is to utilize mixture in the liquid-solid or mutual difference of distribution ratio between insoluble two kinds of liquid, and mixture is carried out to first separation, the instrument of Analysis and Identification then, and its operand is mainly mixed solution.Infusion pump, as the main structure of carrying mixed solution, plays an important role therein.When chromatograph detects, the solution that conventionally only need to seldom measure, according to the requirement of the required supply liquor capacity of system, we need a kind of flow rates controlled, the Microfluidic Pump that flow velocity precision is high.
By working principle, pump can be divided into impeller pump, jet pump and positive displacement pump.Wherein impeller pump is to drive liquid at high speed revolution and mechanical energy is passed to carried liquid by impeller.According to the different impeller types of the impeller of pump and flow passage structure feature, can be divided into again: centrifugal pump (centrifugal pump), axial-flow pump (axial pump), mixed flow pump (mixed-flow pump) and peripheral pump (peripheral pump).Jet pump (jet pump) is the high-speed jet driving fluid producing by working fluid, and then by momentum transfer, the energy of driven fluid is increased.Positive displacement pump is to lean on the motion of workpiece to cause swept volume periodically increase and dwindle and suction liquid, and by the extruding of workpiece, directly making the pressure energy of liquid increase, positive displacement pump is divided into according to the difference of moving element motion mode: reciprocating pump and rotary pump two classes; According to moving element structure difference, be divided into again: reciprocating pump, plunger pump, gear pump, screw pump, vane pump and water ring pump.The advantage of volumetric piston pump is that the flow of pump can control by changing the sectional area of plunger, controlled for design current velocity scope, the Microfluidic Pump that flow velocity precision is high, and volumetric piston pump is well suited for.
In existing technology, for oil pumping in oil fields, or well water pumping etc., the design of pump is pursued flow and is the bigger the better, also fewer for the design of the micro-flow pump of needed utmost point low discharge in liquid chromatograph, more existing low-capacity pumps, as peristaltic pump etc., flow controlled range is larger, but precision can not guarantee when it is operated in utmost point low discharge place, therefore design the flow rates of using in a kind of applicable chromatograph controlled, the Microfluidic Pump that flow velocity precision is high is very necessary.This pump also can be generalized to much else has the aspect of similar transfusion requirement.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the purpose of this utility model is to provide a kind of stepper motor driven end surface cam type micrometeor plunger pump, has advantages of that flow rates is controlled, flow velocity precision is high.
For achieving the above object, the technological scheme that the utility model is taked is:
A kind of stepper motor driven end surface cam type micrometeor plunger pump, comprise pump main body 8, pump main body 8 is fixed on support 20, pump main body 8 centers have a stepped plunger hole 9, pump end cap 10 is arranged on the left side of pump main body 8, form sealing pump chamber, stepped plunger front end 7 closely cooperates by seal valve and plunger hole;
Stepper motor 1 is connected with the rear end of Driving plane camshaft 3 by transmission shaft 2, the front end end cam of Driving plane camshaft 3 is shaped as the sinusoidal line in three cycles and connects from beginning to end, shape around Driving plane camshaft 3 one circle gained, the tail end of stepped plunger rear end 5 is end cam structures corresponding with the front end of Driving plane camshaft 3, stepped plunger front end 7 outsides between stepped plunger rear end 5 and pump main body 8 are provided with spring 6, under the thrust of spring 6, stepped plunger rear end 5 is closely connected by spherical ball 21 with the front end of Driving plane camshaft 3, front end at Driving plane camshaft 3 has the spherical ball groove that depth ratio spherical ball 21 radiuses are large, and spherical ball groove depth is crossed ball diameter biggest place, and spherical ball 21 is covered with in spherical ball groove,
On stepped plunger rear end 5, have keyway, and be connected with pump main body 8 by key 15;
The high order end cavity place of plunger hole 9 is pump chamber, the upper and lower symmetry of pump chamber is opened respectively first liquid sucting port 11 and first liquid port 12, the pump housing Shang Xia 8 symmetry be respectively equipped with an imbibition liquid road 13 being communicated with the first liquid sucting port 11 and a discharge opeing liquid road 14 being communicated with the first liquid port 12, at the pump housing 8 and upper and lower corresponding second liquid sucting port 16 being communicated with imbibition liquid distance 13 and second liquid port 17 being communicated with discharge opeing liquid road 14 run respectively in Driving plane camshaft 3 contact range, upper and lower corresponding the 3rd liquid port 19 that the 3rd liquid sucting port 18 being connected with outside imbibition pipeline is connected with outside drain line with of opening respectively on its side, on Driving plane camshaft 3, open the connectivity slot 4 equating with end cam sinusoidal period number,
When Driving plane camshaft 3 drives stepped plunger to right translation, pump imbibition, connectivity slot 4 on Driving plane camshaft 3 is communicated with the second liquid sucting port 16 and the 3rd liquid sucting port 18, and the second liquid port 17 and the second liquid port 19 are isolated, thereby realize from outside imbibition pipeline suction solution to pump chamber; When Driving plane camshaft 3 drives stepped plunger to left, pump imbibition, connectivity slot 4 on Driving plane camshaft 3 is communicated with the second liquid port 17 and the 3rd liquid port 19, and the second liquid sucting port 16 and the 3rd liquid sucting port 18 are isolated, thereby realize, solution in pump chamber is exported to outside drain line.
The utlity model has following advantage:
1) compact structure.The rotation of Driving plane camshaft 3 and the corresponding relation of liquid sucking-discharging process that utilize cleverly, open connectivity slot 4 on live axle 3, makes compact structure, and system bulk reduces.
2) flow easy-control.Realize the flow control to the continuous plunger pump of micrometeor, only need the plunger diameter of design suitable dimension, and coordinate the control to stepper motor rotating speed.
3) response in time.The intermediate transmission link of whole process is simple, stepper motor rotarily drive the translation of plunger left and right action delay short, corresponding fast.
Accompanying drawing explanation
Fig. 1 is axial sectional view-imbibition process of the present utility model.
Fig. 2 is axial sectional view-discharge opeing process of the present utility model.
Fig. 3 is the A-A sectional view of Fig. 1, the connectivity slot 4 that wherein Fig. 3 (a) is Driving plane camshaft 3 in imbibition process and the position relationship of the liquid sucking-discharging mouth of the pump housing 8; The connectivity slot 4 that Fig. 3 (b) is Driving plane camshaft 3 in discharge opeing process and the position relationship of the liquid sucking-discharging mouth of the pump housing 8.
Fig. 4 is the sectional view in Driving plane camshaft and cross section, stepped plunger joint in Fig. 2.
Fig. 5 is Driving plane camshaft 3 front ends and ball 21 assembling schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
With reference to figure 1 and Fig. 2, a kind of stepper motor driven end surface cam type micrometeor plunger pump, comprise pump main body 8, pump main body 8 is bolted on support 20, pump main body 8 centers have a stepped plunger hole 9, and pump end cap 10 is arranged on the left side of pump main body 8, form sealing pump chamber, stepped plunger front end 7 closely cooperates by seal valve and plunger hole, for pushing solution;
With reference to figure 1, Fig. 2, Fig. 4, Fig. 5, stepper motor 1 is connected by key by transmission shaft 2 and the rear end of Driving plane camshaft 3, thereby drive 3 rotations of Driving plane camshaft, the front end end cam of Driving plane camshaft 3 is shaped as the sinusoidal line in three cycles and connects from beginning to end, shape around Driving plane camshaft 3 one circle gained, the tail end of stepped plunger rear end 5 is end cam structures corresponding with the front end of Driving plane camshaft 3, stepped plunger front end 7 outsides between stepped plunger rear end 5 and pump main body 8 are provided with spring 6, under the thrust of spring 6, stepped plunger rear end 5 is closely connected by spherical ball 21 with the front end of Driving plane camshaft 3.Front end at Driving plane camshaft 3 has the spherical ball groove that depth ratio spherical ball 21 radiuses are large, spherical ball groove depth is crossed ball diameter biggest place, guarantee that spherical ball 21 is all the time in groove, and can not drop out, spherical ball 21 is covered with in spherical ball groove, reduces surface friction drag during for Driving plane camshaft 3 and 5 relative movement of stepped plunger rear end;
With reference to figure 1, Fig. 2, Fig. 4, on stepped plunger rear end 5, have keyway, and be connected with pump main body 8 by key 15, thus the only translation vertically in plunger hole 9 of restriction stepped plunger, and can not rotate;
With reference to figure 1, Fig. 2, Fig. 3, Fig. 4, the high order end cavity place of plunger hole 9 is pump chamber, the upper and lower symmetry of pump chamber is opened respectively first liquid sucting port 11 and first liquid port 12, the pump housing Shang Xia 8 symmetry be respectively equipped with an imbibition liquid road 13 being communicated with the first liquid sucting port 11 and a discharge opeing liquid road 14 being communicated with the first liquid port 12, at the pump housing 8 and upper and lower corresponding second liquid sucting port 16 being communicated with imbibition liquid distance 13 and second liquid port 17 being communicated with discharge opeing liquid road 14 run respectively in Driving plane camshaft 3 contact range, upper and lower corresponding the 3rd liquid port 19 that the 3rd liquid sucting port 18 being connected with outside imbibition pipeline is connected with outside drain line with of opening respectively on its side, on Driving plane camshaft 3, open the connectivity slot 4 equating with end cam sinusoidal period number.
Working principle of the present utility model is:
When the peak of Driving plane camshaft 3 and the peak of stepped plunger rear end 5 are at once, stepped plunger front end 7 is in high order end, when the peak of Driving plane camshaft 3 and the minimum point of stepped plunger rear end 5 are at once, stepped plunger front end 7 is in low order end, at stepper motor 1, drive in the process of Driving plane camshaft 3 rotations, converting with the consecutive periods between highs and lows that contacts of stepped plunger rear end 5 foremost of Driving plane camshaft 3, thus realize continuous liquid sucking-discharging.
When Driving plane camshaft 3 drives stepped plunger to right translation, pump imbibition, connectivity slot 4 on Driving plane camshaft 3 is communicated with the second liquid sucting port 16 and the 3rd liquid sucting port 18, and the second liquid port 17 and the 3rd liquid port 19 are isolated, thereby realize from outside imbibition pipeline suction solution to pump chamber; When Driving plane camshaft 3 drives stepped plunger to left, pump imbibition, connectivity slot 4 on Driving plane camshaft 3 is communicated with the second liquid port 17 and the 3rd liquid port 19, and the second liquid sucting port 16 and the 3rd liquid sucting port 18 are isolated, thereby realize, solution in pump chamber is exported to outside drain line.
Claims (1)
1. a stepper motor driven end surface cam type micrometeor plunger pump, comprise pump main body (8), pump main body (8) is fixed on support (20), pump main body (8) center has a stepped plunger hole (9), pump end cap (10) is arranged on the left side of pump main body (8), form sealing pump chamber, stepped plunger front end (7) closely cooperates by seal valve and plunger hole, it is characterized in that:
Stepper motor (1) is connected with the rear end of Driving plane camshaft (3) by transmission shaft (2), the front end end cam of Driving plane camshaft (3) is shaped as the sinusoidal line in three cycles and connects from beginning to end, shape around Driving plane camshaft (3) one circle gained, the tail end of stepped plunger rear end (5) is the end cam structure corresponding with the front end of Driving plane camshaft (3), stepped plunger front end (7) outside between stepped plunger rear end (5) and pump main body (8) is provided with spring (6), under the thrust of spring (6), stepped plunger rear end (5) is closely connected by spherical ball (21) with the front end of Driving plane camshaft (3), front end at Driving plane camshaft (3) has the large spherical ball groove of depth ratio spherical ball (21) radius, and spherical ball groove depth is crossed ball diameter biggest place, and spherical ball (21) is covered with in spherical ball groove,
Stepped plunger rear end has keyway on (5), and is connected with pump main body (8) by key (15);
The high order end cavity place of plunger hole (9) is pump chamber, the upper and lower symmetry of pump chamber is opened respectively first liquid sucting port (11) and first liquid port (12), in the upper and lower symmetry of the pump housing (8), be respectively equipped with an imbibition liquid road (13) being communicated with the first liquid sucting port (11) and a discharge opeing liquid road (14) being communicated with the first liquid port (12), at the pump housing (8) and upper and lower corresponding second liquid sucting port (16) being communicated with imbibition liquid distance (13) and second liquid port (17) being communicated with discharge opeing liquid road (14) run respectively in Driving plane camshaft (3) contact range, upper and lower corresponding the 3rd liquid port (19) that the 3rd liquid sucting port (18) being connected with outside imbibition pipeline is connected with outside drain line with of opening respectively on its side, on Driving plane camshaft (3), open the connectivity slot (4) equating with end cam sinusoidal period number,
When Driving plane camshaft (3) drives stepped plunger to right translation, pump imbibition, connectivity slot (4) on Driving plane camshaft (3) is communicated with the second liquid sucting port (16) and the 3rd liquid sucting port (18), and the second liquid port (17) and the 3rd liquid port (19) are isolated, thereby realize from outside imbibition pipeline suction solution to pump chamber; When Driving plane camshaft 3 drives stepped plunger to left, pump imbibition, connectivity slot (4) on Driving plane camshaft (3) is communicated with the second liquid port (17) and the 3rd liquid port (19), and the second liquid sucting port (16) and the 3rd liquid sucting port (18) are isolated, thereby realize, solution in pump chamber is exported to outside drain line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420258843.7U CN203879700U (en) | 2014-05-20 | 2014-05-20 | End face cam type micro-flow plunger pump driven by stepping motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420258843.7U CN203879700U (en) | 2014-05-20 | 2014-05-20 | End face cam type micro-flow plunger pump driven by stepping motor |
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| Publication Number | Publication Date |
|---|---|
| CN203879700U true CN203879700U (en) | 2014-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420258843.7U Expired - Fee Related CN203879700U (en) | 2014-05-20 | 2014-05-20 | End face cam type micro-flow plunger pump driven by stepping motor |
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| Country | Link |
|---|---|
| CN (1) | CN203879700U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104952350A (en) * | 2015-06-29 | 2015-09-30 | 欧世盛（北京）科技有限公司 | High-pressure infusion pump in HPLC (high performance liquid chromatograph) for teaching |
| CN106499608A (en) * | 2016-11-03 | 2017-03-15 | 西安交通大学 | The grooved cam that a kind of servomotor drives declines flow plunger displacement pump |
| CN106594099A (en) * | 2017-01-16 | 2017-04-26 | 黄增 | Rotatable reciprocating motion floating coupling knot |
| CN106763876A (en) * | 2017-01-16 | 2017-05-31 | 慎江阀门有限公司 | A kind of ultralow temperature upper-mounting type ball valve |
| CN107725305A (en) * | 2017-09-26 | 2018-02-23 | 机械科学研究总院海西(福建)分院 | A kind of plunger pump of Piezoelectric Driving |
| CN108591309A (en) * | 2018-05-11 | 2018-09-28 | 重庆动霸科技有限公司 | Motor tricycle mechanical disc brake caliper |
| CN113883032A (en) * | 2017-12-12 | 2022-01-04 | 森西勒医药股份公司 | Micropump having a cam mechanism for axial displacement of the rotor |
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2014
- 2014-05-20 CN CN201420258843.7U patent/CN203879700U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104952350A (en) * | 2015-06-29 | 2015-09-30 | 欧世盛（北京）科技有限公司 | High-pressure infusion pump in HPLC (high performance liquid chromatograph) for teaching |
| CN106499608A (en) * | 2016-11-03 | 2017-03-15 | 西安交通大学 | The grooved cam that a kind of servomotor drives declines flow plunger displacement pump |
| CN106499608B (en) * | 2016-11-03 | 2018-04-17 | 西安交通大学 | A kind of grooved cam of servomotor driving declines flow plunger pump |
| CN106594099A (en) * | 2017-01-16 | 2017-04-26 | 黄增 | Rotatable reciprocating motion floating coupling knot |
| CN106763876A (en) * | 2017-01-16 | 2017-05-31 | 慎江阀门有限公司 | A kind of ultralow temperature upper-mounting type ball valve |
| CN107725305A (en) * | 2017-09-26 | 2018-02-23 | 机械科学研究总院海西(福建)分院 | A kind of plunger pump of Piezoelectric Driving |
| CN113883032A (en) * | 2017-12-12 | 2022-01-04 | 森西勒医药股份公司 | Micropump having a cam mechanism for axial displacement of the rotor |
| CN113883032B (en) * | 2017-12-12 | 2023-07-04 | 森西勒医药股份公司 | Micropump with cam mechanism for axial displacement of rotor |
| CN108591309A (en) * | 2018-05-11 | 2018-09-28 | 重庆动霸科技有限公司 | Motor tricycle mechanical disc brake caliper |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 Termination date: 20160520 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |