CN102114286B - Moving method of piston mechanism - Google Patents
Moving method of piston mechanism Download PDFInfo
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- CN102114286B CN102114286B CN200910217569.2A CN200910217569A CN102114286B CN 102114286 B CN102114286 B CN 102114286B CN 200910217569 A CN200910217569 A CN 200910217569A CN 102114286 B CN102114286 B CN 102114286B
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- movement locus
- piston
- connecting rod
- crank
- pin joint
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Abstract
The invention provides a moving method of a piston mechanism, wherein the piston mechanism comprises a crank, a connecting rod connected with the crank and a piston connected with the connecting rod. The moving method of the piston mechanism comprises the step: in a current suction process, a hinge point of the crank and the connecting rod moves along a first movement track, wherein the first movement track is different from a second movement track of the hinge point in the last suction process. According to the invention, in two adjacent suction processes, the piston mechanism moves on different tracks, therefore, the wear caused by simple reciprocating motion on the same track is greatly reduced, and the service life of the piston mechanism is prolonged.
Description
Technical field
The present invention relates to piston mechanism, more specifically, relate to a kind of movement technique of piston mechanism.
Background technology
Respirator is the medical apparatus and instruments that a kind of scientific and technological content is higher.Usually relate to the subjects such as machinery, gas circuit, electronics, software.Piston type electric respirator is made up of control unit, air supply unit, several large modules of gas circuit.Wherein control unit mainly refers to motherboard, and it has the function such as operating software, stored parameter.
Piston mechanism belongs to air supply unit.Piston mechanism mainly comprises: piston, and cylinder, crank, connecting rod, the parts such as reducing motor (not shown), wherein, reducing motor and cylinder are fixed.
In the breathing process of respirator, piston moves to cylinder bottom, forms air-flow; In exhalation process, piston, away from cylinder bottom, covers air.The reciprocating motion of piston has realized the function of respirator.
In reciprocating motion, the parts that wearing and tearing occur mainly contain: reducing motor, piston, cylinder.Current respirator on the market, in continuous running, piston mechanism does one-sided simple reciprocating motion.The wearing and tearing that cause are serious inhomogeneous.Between its decelerator internal gear, between piston and cylinder, there is side force to form, caused wearing and tearing inhomogeneous.And the electric pulmotor with piston mechanism belongs to therapeutic type respirator conventionally, continuous firing between needs are long-term, the lost of life problem that uneven wear causes is very serious.
Summary of the invention
The present invention aims to provide a kind of movement technique of piston mechanism, can reduce the problems such as piston mechanism wearing and tearing are inhomogeneous.
To achieve these goals, a kind of movement technique of piston mechanism is provided, wherein, piston mechanism comprises: crank, the connecting rod being connected with crank, and the piston being connected with connecting rod, the movement technique of this piston mechanism comprises: in current breathing process, the pin joint of crank and connecting rod moves along the first movement locus, wherein, the first movement locus is different from the second movement locus of pin joint in last breathing process.
Preferably, the first movement locus is the first paragraph circular arc on circumference, and the second movement locus is the second segment circular arc on circumference, and wherein, the piston movement stroke that first paragraph circular arc is corresponding equals the piston movement stroke that second segment circular arc is corresponding.
Preferably, the first movement locus and the second movement locus partially overlap.
Preferably, before the pin joint of crank and connecting rod moves along the first movement locus, method also comprises: determine current air-breathing be the N time air-breathing; From a predefined M movement locus, select (N-1) %M+1 movement locus, as the first movement locus.
Preferably, before the pin joint of crank and connecting rod moves along the first movement locus, method also comprises: determine that pin joint completed the motion of m group at the upper semicircumference of circumference before current breathing process; Determine that pin joint completed the motion of n group at second circumference of circumference before current breathing process; If m > is n, the first movement locus is a movement locus in n+1 group on second circumference, and is one section of circular arc of second circumference, otherwise, the first movement locus is a movement locus in m+1 group on upper semicircumference, and is one section of circular arc of upper semicircumference.
Preferably, in current breathing process, when the pin joint of crank and connecting rod moves along the first movement locus, also comprise: piston and connection-rod linkage, and move along the 3rd movement locus, wherein, the 3rd movement locus is different from the 4th movement locus of piston in last breathing process.
Preferably, the 3rd movement locus is identical with the stroke of the 4th movement locus.
Preferably, the 3rd movement locus is the different line segments on same straight line from the 4th movement locus.
Preferably, the 3rd movement locus and the 4th movement locus partially overlap.
According to the present invention, in twice adjacent breathing process, piston mechanism moves on different tracks, and greatly slow down because of simple on same track and moved back and forth the wearing and tearing that cause, thus the service life of having improved piston mechanism.
Brief description of the drawings
Accompanying drawing is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the schematic diagram of the respirator of the embodiment of the present invention;
Fig. 2 is that the pin joint in piston mechanism as shown in Figure 1 moves at the schematic diagram of second circumference;
Fig. 3 is according to the schematic diagram of the movement locus of the pin joint of the embodiment of the present invention.
Detailed description of the invention
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 1 is according to the schematic diagram of the respirator of the embodiment of the present invention.As shown in Figure 1, respirator mainly comprises: piston 1, outgassing nonreturn valve 2, automatically controlled outlet valve 3, pressure transducer 5, flow transducer 6, air inlet 7, breather check valve 8, cylinder 9, connecting rod 10 and crank 11.
In the present embodiment, piston mechanism mainly comprises: crank 11, the connecting rod 10 being connected with crank 11, and the piston 1 being connected with connecting rod 10.
When respirator air feed starts, crank 11 is positioned at initial position AB place, and piston is in a C position, and automatically controlled outlet valve 3 cuts out.In air feed, reducing motor axle drives AB to turn clockwise, and piston 1 advances to the bottom of cylinder 9.Squeezed the air-flow flows in lung 4 through outgassing nonreturn valve 2, flow transducer 6 by piston.As piston arrives point C
1time (crank 11 rotates to B with connecting rod 10 pin joints
1point), air-breathing end, piston squeezes the gas and all enters pulmonary, and this portion gas is corresponding to respirator setup parameter, for example, tidal volume (once sucking the gas QI-mass of pulmonary).
In exhalation process, automatically controlled outlet valve is opened, and in lung, gas enters atmosphere, and piston is by C
1be retracted into a C, air is by air inlet 7, fill into cylinder interior through breather check valve 8.
In the present embodiment, the movement locus of the pin joint of crank 11 and connecting rod 10 in the breathing process of adjacent twice is different, as shown in Figure 3.For example, when air-breathing for the first time, the movement locus of pin joint is the circular arc DF on circumference, corresponding, and piston 1 links with connecting rod 10, and the first line segment on straight line moves; When air-breathing for the second time, the movement locus of pin joint is the circular arc EG in same circumference, accordingly, piston 1 links with connecting rod 10, and the second line segment in same straight line moves, here, the first line segment is identical with the length of the second line segment, namely, the stroke of the each motion of piston is identical, to ensure that tidal volume is identical.
Visible, in twice adjacent breathing process, pin joint and piston all move on different tracks, instead of simply move back and forth on same track, thereby greatly slow down because of the wearing and tearing that simple reciprocating motion causes on same track, the service life of having improved piston mechanism.
Further, can preset M movement locus, for example, circular arc DF, EG, FH, GI etc. in Fig. 3, when pin joint is prolonging any one when motion in this M movement locus, piston 1 is subject to the thrust of connecting rod 10 and the identical stroke that moves.Here, one or more the partially overlapping in circular arc DF, EG, FH, GI, but the present invention is not limited only to this, and M movement locus also can not overlap each other, for example, circular arc DF, FH etc.
Before crank 11 and the pin joint of connecting rod 10 move along the first movement locus, determine current air-breathing be the N time air-breathing; From a predefined M movement locus, select (N-1) %M+1 movement locus, as the first movement locus.For example, if current air-breathing be the 2nd time air-breathing, N=2, M=4, select EG be the first movement locus; If current air-breathing be that the 5th is air-breathing, N=5, M=4, select DF be the first movement locus.
Further, as shown in Figure 2, the pin joint in the present embodiment, except upper semicircumference motion, can also move on second circumference, thus the further even wearing and tearing of piston mechanism.
As shown in Figure 3, before crank 11 and the pin joint of connecting rod 10 move along the first movement locus, determine that pin joint completed the motion of m group at the upper semicircumference of circumference before current breathing process; Determine that pin joint completed the motion of n group at second circumference of circumference before current breathing process; If m > is n, the first movement locus is a movement locus in n+1 group on second circumference, and is one section of circular arc of second circumference, otherwise, the first movement locus is a movement locus in m+1 group on upper semicircumference, and is one section of circular arc of upper semicircumference.
For example, current air-breathing before, pin joint has completed 3 groups of motions on upper semicircumference, and on second circumference, has completed 2 groups of motions, at this moment, m=3, n=2.Due to m > n,, in current air-breathing process, the first movement locus is a movement locus in the 3rd group on second circumference, and is one section of circular arc of second circumference.Further, the number of the movement locus that each group comprises can be identical, for example, comprises 10 movement locus.Like this, in the process of 1st～10 times air-breathing (regard upper semicircumference as the 1st group), pin joint moves at upper semicircumference, and the movement locus difference of adjacent twice; In the process of 11st～20 times air-breathing (regard second circumference as the 1st group), m=1, n=0, pin joint is at second circular motion, and the movement locus difference of adjacent twice; In the process of 21st～30 times air-breathing (regard upper semicircumference as the 2nd group), m=1, n=1, pin joint moves at upper semicircumference, and the movement locus difference of adjacent twice; By that analogy.
By submitting for motion at upper semicircumference and second circumference, the phase place of piston mechanism motion is divided into two large scopes, and within each phase range, is no longer the simple reciprocating motion repeating, but the movement locus difference of adjacent twice.Thereby, the one-sided wearing and tearing of a whole set of piston mechanism are greatly reduced.In actual applications, can Using such method do Further Division segmental arc, further reduce one-sided simple back and forth wearing and tearing.
According to the present invention, piston mechanism is moved on different tracks, greatly slow down because of simple on same track and moved back and forth the wearing and tearing that cause, thus the service life of having improved piston mechanism.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. the movement technique of a piston mechanism, wherein, piston mechanism comprises: crank (11), the connecting rod (10) being connected with described crank (11), and the piston (1) being connected with connecting rod (10), it is characterized in that, comprising:
In current breathing process, crank (11) moves along the first movement locus with the pin joint of connecting rod (10), and wherein, described the first movement locus is different from the second movement locus of pin joint described in last breathing process;
Wherein, described the first movement locus is the first paragraph circular arc on circumference, and described the second movement locus is the second segment circular arc on described circumference, and wherein, the piston movement stroke that described first paragraph circular arc is corresponding equals the piston movement stroke that described second segment circular arc is corresponding.
2. method according to claim 1, is characterized in that, described the first movement locus and described the second movement locus partially overlap.
3. method according to claim 1, is characterized in that, before crank (11) and the pin joint of connecting rod (10) move along the first movement locus, described method also comprises:
Determine current air-breathing be the N time air-breathing;
From a predefined M movement locus, select (N-1) %M+1 movement locus, as described the first movement locus.
4. method according to claim 2, is characterized in that, before crank (11) and the pin joint of connecting rod (10) move along the first movement locus, described method also comprises:
Determine current air-breathing be the N time air-breathing;
From a predefined M movement locus, select (N-1) %M+1 movement locus, as described the first movement locus.
5. method according to claim 1, is characterized in that, before crank (11) and the pin joint of connecting rod (10) move along the first movement locus, described method also comprises:
Determine that described pin joint completed the motion of m group at the upper semicircumference of circumference before described current breathing process;
Determine that described pin joint completed the motion of n group at second circumference of circumference before described current breathing process;
If m>n, described the first movement locus is a movement locus in n+1 group on described second circumference, and be one section of circular arc of described second circumference, otherwise, described the first movement locus is a movement locus in m+1 group on described upper semicircumference, and is one section of circular arc of described upper semicircumference.
6. method according to claim 1, is characterized in that, in current breathing process, when crank (11) moves along the first movement locus with the pin joint of connecting rod (10), also comprises:
Described piston (1) and described connecting rod (10) interlock, and move along the 3rd movement locus, wherein, described the 3rd movement locus is different from the 4th movement locus of piston described in last breathing process (1).
7. method according to claim 6, is characterized in that, described the 3rd movement locus is identical with the stroke of described the 4th movement locus.
8. method according to claim 6, is characterized in that, described the 3rd movement locus is the different line segments on same straight line from described the 4th movement locus.
9. method according to claim 6, is characterized in that, described the 3rd movement locus and described the 4th movement locus partially overlap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910217569.2A CN102114286B (en) | 2009-12-31 | 2009-12-31 | Moving method of piston mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910217569.2A CN102114286B (en) | 2009-12-31 | 2009-12-31 | Moving method of piston mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN102114286A CN102114286A (en) | 2011-07-06 |
| CN102114286B true CN102114286B (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910217569.2A Expired - Fee Related CN102114286B (en) | 2009-12-31 | 2009-12-31 | Moving method of piston mechanism |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111330126A (en) * | 2020-03-05 | 2020-06-26 | 华中科技大学 | Disinfection respirator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300348A (en) * | 1998-01-26 | 2001-06-20 | 布里斯托尔压缩机公司 | Variable capacity compressor having adjustable crankpin throw structure |
| CN101076682A (en) * | 2004-06-29 | 2007-11-21 | 托马斯·马克·韦内托茨 | Epitrochoidal crankshaft mechanism and method |
| CN101310785A (en) * | 2007-12-28 | 2008-11-26 | 北京谊安医疗***股份有限公司 | Electric resuscitator mode control devices and methods thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008096874A1 (en) * | 2007-02-09 | 2008-08-14 | Daikin Industries, Ltd. | Reciprocating compressor |
-
2009
- 2009-12-31 CN CN200910217569.2A patent/CN102114286B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300348A (en) * | 1998-01-26 | 2001-06-20 | 布里斯托尔压缩机公司 | Variable capacity compressor having adjustable crankpin throw structure |
| CN101076682A (en) * | 2004-06-29 | 2007-11-21 | 托马斯·马克·韦内托茨 | Epitrochoidal crankshaft mechanism and method |
| CN101310785A (en) * | 2007-12-28 | 2008-11-26 | 北京谊安医疗***股份有限公司 | Electric resuscitator mode control devices and methods thereof |
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| CN102114286A (en) | 2011-07-06 |
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