CN102352832A - Control method and control device of soft start and soft stop of air compressor - Google Patents
Control method and control device of soft start and soft stop of air compressor Download PDFInfo
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- CN102352832A CN102352832A CN2011103432041A CN201110343204A CN102352832A CN 102352832 A CN102352832 A CN 102352832A CN 2011103432041 A CN2011103432041 A CN 2011103432041A CN 201110343204 A CN201110343204 A CN 201110343204A CN 102352832 A CN102352832 A CN 102352832A
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Abstract
The invention relates to a control method and a control device of soft start and soft stop of an air compressor, wherein the control method is characterized by controlling the operation states of a switch valve and a proportional valve of the air compressor through changing the external input, and further controlling the operation state of a hydraulic motor so as to achieve the soft start and soft stop of the air compressor. The control method comprises the following steps: setting the switch quantity of the external input N and controlling the output value of the switch valve m, wherein when N=N1, switch valve m=m1, and a time begins to timing, current in the proportional valve increases gradually, and when the timing time t reaches the set time, the current of the proportional valve reaches the set current value, and when N=N2, the switch valve m=m2, and the timer begins to timing, current in the proportional valve decreases gradually, and after the timing time t reaches the set time, the current of the proportional valve k reaches the set current value; and controlling the operation state of the air compressor through setting the value of the set current value of the proportional valve. According to the invention, the technical prejudice of the field is overcome effectively.
Description
Technical field
The present invention relates to a kind of controlling method and control gear, particularly relate to the controlling method and the control gear of a kind of air compressor soft start, soft stop.
Background technique
Air compressor, promptly air compressor is the main body in the compressed air source unit.It is the device that the mechanical energy of prime mover is converted to the gas pressure ability, is compressed-air actuated air pressure generating means.Air compressor is more and more as the utilization of power source on engineering equipment.Air compressor is carried out to the cover sale with motor and control system collocation mostly on the market, owing to reasons such as engineering machinery structure and control mode, the inapplicable engineering machinery of existing controller complete equipment.
Because mostly the air compressor that engineering machinery is used is bare machine, not charged motivation and control system must redesign its control system when design machinery.
The air compressor system that on engineering machinery, uses mainly contains two kinds of control modes, is respectively: motoring mode and fluid motor-driven mode.But the fluid motor-driven mode is used seldom on engineering machinery, and reason is mostly prior art is the mode that air compressor directly drives.The switch valve of air compressor get electric after, the air compressor oil hydraulic motor directly drives air compressor and converts mechanical energy to the gas pressure ability.
But above-mentioned prior art also has following technological deficiency:
(1) because air compressor has only a switch valve control, and in a single day switch valve gets electric, and oil hydraulic motor just is in maximum rating, air compressor is owing to suddenly with the maximum rating operation, cause equipment dynamic unstable;
(2) when the switch valve dead electricity, the operation of air compressor just can stop suddenly as stopping in emergency, and so just can cause the air compressor outlet pressure too high easily, shortens the working life of air compressor.
Summary of the invention
The objective of the invention is to propose a kind of air compressor that can effectively prevent because of the inrush current excessive air compressor soft start of air compressor damage, the controlling method and the control gear of soft stop of causing of moment.
For realizing above-mentioned purpose; The invention provides the controlling method of a kind of air compressor soft start, soft stop; Through changing the working state of outside input control air compressor switch valve and Proportional valve; And then the working state of control oil hydraulic motor; Realize soft start, the soft stop of air compressor; Said controlling method comprises the steps: that also the switching value of setting outside input N is at least N1 or N2, and the output value of control switch valve m is at least m1 or m2 thus; When N=N1, switch valve m=m1, timer begin to carry out timing, increase gradually with electric current in the Proportional valve that switch valve links to each other, and after timing time t reaches set time t1, make the electric current of Proportional valve k reach and set current value i1; When N=N2, switch valve m=m2, timer begin to carry out timing, reduce gradually with electric current in the Proportional valve that switch valve links to each other, and after timing time t reaches set time t2, make the electric current of Proportional valve k reach and set current value i2; Setting current value i1 through Proportional valve is set and the numerical value of i2 are controlled the running state of air compressor.
Preferably, the output of said Proportional valve is according to the increase of timer timing time and linear increment or reducing and linear decrease according to the timer timing time.
More preferably, the said current value i1 current value that is the air compressor proper functioning.
Preferably, said current value i2 is the out-of-work current value of air compressor.
Further, said set time t1=t2.
Further, said set time 4s≤t1≤12s.
Another object of the present invention does; The control gear of a kind of air compressor soft start, soft stop is provided; Be connected with oil hydraulic motor on the said air compressor; Said control gear comprises the body that links to each other with said oil hydraulic motor; In said body, be provided with control module; And the switch valve and the Proportional valve that link to each other with said control module respectively, said control module comprises load module and timer and the judge module that links to each other with timer with said load module respectively.
Preferably, said Proportional valve links to each other with said oil hydraulic motor.
Based on technique scheme, advantage of the present invention is:
The present invention uses the start and stop of switch valve control air compressor, and the hydraulic fluid flow rate of usage ratio valve control air compressor oil hydraulic motor is linear increment from small to large, makes when air compressor starts, and can not cause damage because of electric current moment is excessive.Obtain unexpected technique effect thus, overcome technology prejudice, made the air compressor system that uses on the engineering machinery can use the driving mode of oil hydraulic motor effectively.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the FB(flow block) of controlling method of the present invention;
Fig. 2 is the structural representation of control gear of the present invention.
Embodiment
Through accompanying drawing and embodiment, technological scheme of the present invention is done further detailed description below.
Referring to Fig. 1, the preferred embodiment of the controlling method of a kind of air compressor soft start of the present invention shown in it, soft stop, controlling method of the present invention is controlled the working state of air compressor switch valve through changing outside input, thus the start and stop of control air compressor; Control the working state of oil hydraulic motor through the working state of control ratio valve, and then realize soft start, the soft stop of air compressor, said controlling method further comprises following steps:
The switching value of setting outside input N is at least N1 or N2, and the output value of control switch valve m is at least m1 or m2 thus; Certainly, also can the switching value of a plurality of outside input N and the output value of multiple switch valve be set according to the needs of actual working state.In the present invention, the switching value of two outside input N and the output value of 2 kinds of switch valves preferably are set.
Further, when N=N1, switch valve m=m1, timer begin to carry out timing, increase gradually with electric current in the Proportional valve that switch valve links to each other, and after timing time t reaches set time t1, make the electric current of Proportional valve k reach and set current value i1; Preferably, the output of said Proportional valve is according to the increase of timer timing time and linear increment.
Meanwhile, when N=N2, switch valve m=m2, timer begin to carry out timing, reduce gradually with electric current in the Proportional valve that switch valve links to each other, and after timing time t reaches set time t2, make the electric current of Proportional valve k reach and set current value i2; Preferably, the output of said Proportional valve reducing and linear decrease according to the timer timing time
Thereby setting current value i1 through Proportional valve is set and the numerical value of i2 are controlled the running state of air compressor.In the present invention, setting current value i1 is the current value of air compressor proper functioning, the current value when setting current value i2 and be air compressor and quitting work.
Described set time t1 and t2 can be different, in the present invention, preferably, said set time t1=t2.
Further, said set time 4s≤t1≤12s.For example: t1=t2=10s.
Referring to Fig. 2; The preferred embodiment of the control gear of a kind of air compressor soft start of the present invention shown in it, soft stop; Be connected with oil hydraulic motor 30 on the said air compressor 20; Said control gear comprises the body 10 that links to each other with said oil hydraulic motor 30; In said body 10, be provided with control module 1; And the switch valve that links to each other with said control module 1 respectively 2 and Proportional valve 3, said control module 1 comprises load module 11 and timer 12 and the judge module 13 that links to each other with timer 12 with said load module 11 respectively.Further, said Proportional valve 3 links to each other with said oil hydraulic motor 30.
Particularly, referring to Fig. 1 and Fig. 2, the working procedure of control gear of the present invention and job step are:
The external switch that is input as of control gear is imported N (as shown in Figure 1), the control signal input value, and control gear is output as the output value m (m is a Boolean) of switch valve 2 and the current value i of Proportional valve 3.After the external switch input, in the present embodiment, when N=1, the output m=1 of control gear, switch valve 2 is opened (as shown in Figure 1); Simultaneously; Timer 12 picks up counting; The output of Proportional valve 2 begins linear increment according to the time; Through the collaborative work between timer 12 and the judge module 13, behind 10s, the current value i of Proportional valve 2 (for example: the current value that reaches the air compressor proper functioning) reaches maximum; At this moment; The aperture of Proportional valve 2 is maximum, and oil hydraulic motor 30 progressively reaches normal working along with the electric current of Proportional valve 2 increases.When N=0; The output m=0 of control gear, timer 12 picks up counting, and the output of Proportional valve 3 begins linear decrease according to the time; Through the collaborative work between timer 12 and the judge module 13; Behind the 10s, the electric current of Proportional valve 3 reaches minimum (for example: reach the out-of-work current value of air compressor), at this moment; The aperture of Proportional valve 3 is minimum; Oil hydraulic motor 30 progressively quits work along with the electric current linearity of Proportional valve 2 reduces, and final switch valve 2 cuts out.
Obviously, those of ordinary skill in the art can use the controlling method and the control gear of a kind of air compressor soft start of the present invention, soft stop, constitutes various types of controlling methods and control apparatus.
Should be noted that at last: above embodiment is only in order to technological scheme of the present invention to be described but not to its restriction; Although with reference to preferred embodiment the present invention has been carried out detailed explanation, the those of ordinary skill in affiliated field is to be understood that: still can specific embodiments of the invention make amendment or the part technical characteristics is equal to replacement; And not breaking away from the spirit of technological scheme of the present invention, it all should be encompassed in the middle of the technological scheme scope that the present invention asks for protection.
Claims (8)
1. the controlling method of an air compressor soft start, soft stop is characterized in that: through changing the working state of outside input control air compressor switch valve, thus the start and stop of control air compressor; Control the working state of oil hydraulic motor through the working state of control ratio valve, and then realize soft start, the soft stop of air compressor, said controlling method also comprises the steps:
The switching value of setting outside input N is at least N1 or N2, and the output value of control switch valve m is at least m1 or m2 thus;
When N=N1, switch valve m=m1, timer begin to carry out timing, increase gradually with electric current in the Proportional valve that switch valve links to each other, and after timing time t reaches set time t1, make the electric current of Proportional valve k reach and set current value i1;
When N=N2, switch valve m=m2, timer begin to carry out timing, reduce gradually with electric current in the Proportional valve that switch valve links to each other, and after timing time t reaches set time t2, make the electric current of Proportional valve k reach and set current value i2;
Setting current value i1 through Proportional valve is set and the numerical value of i2 are controlled the running state of air compressor.
2. the controlling method of air compressor soft start according to claim 1, soft stop is characterized in that: the output of said Proportional valve is according to the increase of timer timing time and linear increment or reducing and linear decrease according to the timer timing time.
3. the controlling method of air compressor soft start according to claim 2, soft stop is characterized in that: said current value i1 is the current value of air compressor proper functioning.
4. the controlling method of air compressor soft start according to claim 2, soft stop is characterized in that: said current value i2 is the out-of-work current value of air compressor.
5. according to the controlling method of claim 3 or 4 described air compressor soft starts, soft stop, it is characterized in that: said set time t1=t2.
6. the controlling method of air compressor soft start according to claim 5, soft stop is characterized in that: said set time 4s≤t1≤12s.
7. the control gear of an air compressor soft start, soft stop; Be connected with oil hydraulic motor (30) on the said air compressor (20); It is characterized in that: said control gear comprises the body (10) that links to each other with said oil hydraulic motor (30); In said body (10), be provided with control module (1); And switch valve (2) that links to each other with said control module (1) respectively and Proportional valve (3), said control module (1) comprises load module (11) and timer (12) and the judge module (13) that links to each other with timer (12) with said load module (11) respectively.
8. the controlling method of air compressor soft start according to claim 7, soft stop is characterized in that: said Proportional valve (3) links to each other with said oil hydraulic motor (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103432041A CN102352832A (en) | 2011-11-03 | 2011-11-03 | Control method and control device of soft start and soft stop of air compressor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103432041A CN102352832A (en) | 2011-11-03 | 2011-11-03 | Control method and control device of soft start and soft stop of air compressor |
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| CN102352832A true CN102352832A (en) | 2012-02-15 |
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| CN2011103432041A Pending CN102352832A (en) | 2011-11-03 | 2011-11-03 | Control method and control device of soft start and soft stop of air compressor |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3529743A1 (en) * | 1985-08-20 | 1987-02-26 | Bosch Gmbh Robert | Hydrostatic drive of auxiliary units of a vehicle |
| JPH09175777A (en) * | 1995-12-27 | 1997-07-08 | Hitachi Constr Mach Co Ltd | Automatic stop device of crane |
| US20030010152A1 (en) * | 2001-07-13 | 2003-01-16 | Deere & Company | Speed control for a utility vehicle |
| CN1397748A (en) * | 2001-05-25 | 2003-02-19 | 株式会社小松制作所 | Drive controller of cooling fan |
| JP2008143635A (en) * | 2006-12-08 | 2008-06-26 | Hitachi Sumitomo Heavy Industries Construction Crane Co Ltd | Swivel control unit for crane |
| CN101451548A (en) * | 2007-12-04 | 2009-06-10 | 中南大学 | Hydraulic transmission system implementing rapid starting/stopping and stable steering for large inertia load |
| CN201412284Y (en) * | 2009-06-22 | 2010-02-24 | 浙江志高机械有限公司 | Hydraulic power output device of drill carriage |
| CN201596276U (en) * | 2009-11-03 | 2010-10-06 | 徐州重型机械有限公司 | Fire fighting truck and fire-fighting foaming system thereof |
| CN201865881U (en) * | 2010-08-02 | 2011-06-15 | 昆明中铁大型养路机械集团有限公司 | Hydraulic driving device of air compressor |
-
2011
- 2011-11-03 CN CN2011103432041A patent/CN102352832A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3529743A1 (en) * | 1985-08-20 | 1987-02-26 | Bosch Gmbh Robert | Hydrostatic drive of auxiliary units of a vehicle |
| JPH09175777A (en) * | 1995-12-27 | 1997-07-08 | Hitachi Constr Mach Co Ltd | Automatic stop device of crane |
| CN1397748A (en) * | 2001-05-25 | 2003-02-19 | 株式会社小松制作所 | Drive controller of cooling fan |
| US20030010152A1 (en) * | 2001-07-13 | 2003-01-16 | Deere & Company | Speed control for a utility vehicle |
| JP2008143635A (en) * | 2006-12-08 | 2008-06-26 | Hitachi Sumitomo Heavy Industries Construction Crane Co Ltd | Swivel control unit for crane |
| CN101451548A (en) * | 2007-12-04 | 2009-06-10 | 中南大学 | Hydraulic transmission system implementing rapid starting/stopping and stable steering for large inertia load |
| CN201412284Y (en) * | 2009-06-22 | 2010-02-24 | 浙江志高机械有限公司 | Hydraulic power output device of drill carriage |
| CN201596276U (en) * | 2009-11-03 | 2010-10-06 | 徐州重型机械有限公司 | Fire fighting truck and fire-fighting foaming system thereof |
| CN201865881U (en) * | 2010-08-02 | 2011-06-15 | 昆明中铁大型养路机械集团有限公司 | Hydraulic driving device of air compressor |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: XUZHOU XUGONG SCHWING MACHINERY CO., LTD. Free format text: FORMER OWNER: XCMG CONSTRUCTION MACHINERY CO., LTD. Effective date: 20130730 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20130730 Address after: 221004 No. 29, Peach Road, Xuzhou economic and Technological Development Zone, Jiangsu, Xuzhou Applicant after: XCMG Schwing Machinery Co., Ltd. Address before: 221004 No. 19 Peach Road, Xuzhou Economic Development Zone, Jiangsu, China Applicant before: XCMG Construction Machinery Co., Ltd. |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120215 |