CN103471540A - Measuring device for rack position of mechanical pump of dual-fuel engine - Google Patents
Measuring device for rack position of mechanical pump of dual-fuel engine Download PDFInfo
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- CN103471540A CN103471540A CN2013104511302A CN201310451130A CN103471540A CN 103471540 A CN103471540 A CN 103471540A CN 2013104511302 A CN2013104511302 A CN 2013104511302A CN 201310451130 A CN201310451130 A CN 201310451130A CN 103471540 A CN103471540 A CN 103471540A
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- stop nut
- installation sleeve
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Abstract
The invention provides a measuring device for the rack position of a mechanical pump of a dual-fuel engine. The measuring device comprises a support, an angle displacement sensor, a rocker arm and a center shaft, wherein a shaft of the angle displacement sensor penetrates through one end of the support and is fixed to the upper end of the rocker arm; the center shaft is sleeved with the other end of the support; the center shaft comprises a linear part and two clamping parts installed at the left portion of the linear part; the two clamping parts are provided with concave grooves; a rolling bearing is connected with the lower end of the rocker arm through a stepped shaft and installed between the two concave grooves; an installation sleeve is arranged outside the right portion of the center shaft; a stop nut is arranged between the installation sleeve and the center shaft; the stop nut and the installation sleeve are in threaded fit; an ejector pin is installed at the right end portion of the center shaft; a boss is arranged on the inner wall of the stop nut; a spring is installed outside the right portion of the center shaft; the left end portion and the right end portion of the spring abut against the boss and the ejector pin respectively. The measuring device can lower the modification cost of the dual-fuel engine, the measurement result is reliable, and meanwhile space is saved largely.
Description
Technical field
What the present invention relates to is a kind of engine, specifically dual-fuel engine tooth bar position-measurement device.
Background technology
China's environment situation allows of no optimist, and the environmental pollution situation caused by tail gas such as diesel engines is more and more serious, has become one of distinct issues in atmospheric pollution.Fog weather as serious as Beijing in 2013, broad masses' health in serious threat.Along with the people's environmental consciousness is more and more stronger, control the diesel engine noxious gas emission very urgent.
With traditional fuel, compare, rock gas is gaseous fuel, with air, mixes more evenly fully, can greatly reduce the noxious emissions such as CO, HC, NOx, also reduces the discharge of particle simultaneously.Rock gas burns as an alternative, low emission, and high economy advantage is comparatively obvious, by the world, is approved and promotes.Add that the China's natural gas resource is very abundant, add that rock gas has the high thermal efficiency, less expensive, burning noxious emission pollutant few outstanding advantages receives great acclaim, and is considered to one of the most promising Engine Alternative Fuel.
In the face of the baptisms of energy-conservation and environmental protection two aspects, the environmental administration of global every country government all starts to make more strict Abgasgesetz.The Chinese government comes into effect state's IV discharge on automobile emission regulation on January 1st, 2010, International Maritime Organization (IMO) (IMO) has passed through in 2008 within 2016 in the emission control district, to carry out Tier III standard, and these rules have all proposed stricter requirement to the discharge of all types of diesel engines.
And the dual-fuel engine based on the diesel engine transformation has very large advantage in the minimizing discharge, can significantly reduce discharge, operating cost descends simultaneously, and dual-fuel engine has huge development prospect, urgent all the more to the development of dual-fuel engine.
Dual-fuel engine based on the diesel engine transformation, the diesel oil amount is sprayed to control and is still utilized mechanical pump, due to the change of the diesel injection moment and emitted dose, need to carry out reformation of electric control to mechanical pump, so that Measurement accuracy tooth bar position, and then improve the performance of dual-fuel engine.
The tooth bar position signal acquisition, and what adopt is displacement transducer, and it mainly is divided into contact and contactless two kinds, and contact mainly comprises conductive plastics rheostat and slider type rheostat; Contactless difference induction formula, differential transformation type, the electric vortex type etc. of mainly comprising, contact type structure and circuit are simple, but physical construction is not firm, and easy to wear, serviceable life is short; Contactless have characteristics such as highly sensitive, that dynamic response is good, but most of the existence is subject to temperature and medium influence is large, the range of linearity is narrow shortcoming.
In the patent document of Chinese Patent Application No. 95227743.3, a kind of rack actuator of diesel engine injector has been proposed, comprise eddy current displacement sensor and amplifying circuit, this position transducer adopts the electric vortex type with temperature compensation, non-cpntact measurement, this sensor major defect is strong to the testee material sensitivity, if the ratch Facing material is inhomogeneous, perhaps there is slight crack ratch inside, capital affects measurement result, require the ratch diameter to be necessary for more than three times of pickup wire loop diameter simultaneously, on dual-fuel engine, apply and be restricted.
What at present tooth bar position-measurement device sensor application used was more is the differential transformer type linear displacement transducer, a kind of rack redundant electromagnetic driver of oil pump for diesel engine has been proposed in the patent document of Chinese Patent Application No. 200710071966.4, it comprises housing, be arranged on the topworks in housing, sensing element and positioning guide mechanism, described sensing element comprises two linear displacement transducers, sensor sensing bar and sensor connecting link, this invention adopts the bilinear displacement transducer can guarantee the reliable collection to the ratch displacement signal, shortcoming is compared angular displacement sensor, temperature limit is-20～80 ℃, temperature range is narrower, the sensor application cost is high.
Summary of the invention
The object of the present invention is to provide motion can realize the dual-fuel engine mechanical pump tooth bar position-measurement device of gapless transmission, reliable measurements dual-fuel engine mechanical pump tooth bar movement position.
The object of the present invention is achieved like this:
A kind of dual-fuel engine mechanical pump of the present invention tooth bar position-measurement device, it is characterized in that: comprise support, angular displacement sensor, rocking arm, central shaft, described support is L-type, the axle of angular displacement sensor passes an end of support and is fixed on the upper end of rocking arm, the other end of support is enclosed within on central shaft, central shaft comprises straight line portion and is arranged on two retained parts of straight line portion left part, two retained parts are provided with recessed groove, rolling bearing is connected with the lower end of rocking arm by multidiameter and rolling bearing is arranged between two recessed grooves, central shaft right part outside arranges installation sleeve, between installation sleeve and central shaft, stop nut is set, the outer wall of stop nut matches by screw thread with the inwall of installation sleeve, thimble is installed in the right part of central shaft, the stop nut inwall is provided with boss, the outside mounting spring of central shaft right part, the left part of spring and right part withstand on respectively on boss and thimble.
The present invention can also comprise:
1, between central shaft and stop nut, linear bearing is installed.
2, support casing between stop nut and installation sleeve, and can make support closely be connected with installation sleeve by stop nut and the cooperation of installation sleeve in the part of central shaft.
Advantage of the present invention is: the present invention can propose a kind of new measurement tooth bar position, by motion structure, the rack linear displacement signal is converted into to the pivot angle signal, utilizes angular displacement sensor to spread out of displacement signal.The angular displacement sensor cost is relatively low, c
The accompanying drawing explanation
Fig. 1 is structural representation a of the present invention;
Fig. 2 is structural representation b of the present invention;
Fig. 3 is stereographic map of the present invention.
Embodiment
Below in conjunction with accompanying drawing, for example the present invention is described in more detail:
In conjunction with Fig. 1～3, angular displacement sensor 1 axle is arranged on rocking arm 2 by the hole that is of a size of Φ 3mm, and the rectangular channel clamping distance on rocking arm 2 is 1mm, guarantees the fixing of angular displacement sensor 1.Bearing 5 selection standard part rolling bearings 625, linear bearing 8 adopts model LBP51015.
By multidiameter 3, rocking arm 2 and rolling bearing 5 are coupled together, linear bearing 8 is installed on central shaft 6, by linear bearing 8 guiding function, guarantee the rectilinear motion of central shaft 6 frictions.Support 4 is connected fastening with installation sleeve 11 by stop nut 7.Have the screw thread of M5 on central shaft 6, its screw thread by M5 is connected with thimble 10.Installation sleeve 11 inside dimensions are the M18 threaded hole, are used for coordinating with stop nut 7, can regulate the position of stop nut 7 simultaneously, the maximum displacement of restriction tooth bar 12.Spring 9 contacts with thimble 10, under the oppressive force effect of spring 9, guarantees that thimble 10 does not separate all the time with tooth bar 12.Thimble 10 contacts with the tooth bar center pit, reliable to guarantee location.
When tooth bar 12 is subjected to displacement, central shaft 6 is followed tooth bar 12 and is moved together, drives the swing of rocking arm 2.Angular displacement sensor 1, by measuring the pendulum angle of rocking arm 2, is changed to electronic signal by position signalling, can record the displacement of central shaft 6, the displacement that namely tooth bar occurs.
This apparatus structure compactness, reliable operation, compare general measure tooth bar position linear displacement transducer used, and the present invention's angular displacement sensor cost used is lower, suitablely on the dual-fuel engine mechanical pump, uses.
The rotating shaft of angular displacement sensor is fixed on rocking arm, has rectangular channel on rocking arm, facilitates the clamping and positioning of sensor.Spring is installed on central shaft, and under the pretightning force effect of spring, thimble contacts all the time with tooth bar.Thimble is arranged on central shaft by threaded hole, during tooth bar generation straight-line displacement, by thimble, passes to central shaft, the central shaft setting in motion, and the linear bearing kinematic pair guarantees that central shaft does straight line friction campaign.By adjusting the position of stop nut in installation sleeve, can limit the maximum displacement that tooth bar moves, and then can realize the control to the maximum diesel injection amount of dual-fuel engine.Be designed with ring groove on central shaft, for rolling bearing is installed, rolling bearing moves with central shaft, and by the swing of rocking arm, rectilinear motion is converted into and rotatablely moves.Spring fitting, in stop nut, can be saved space.Measure the pendulum angle of rocking arm by angular position pick up, the displacement of the output gear bar that can convert.
The present invention also comprises on tooth bar and has center pit, and thimble can insert the tooth bar center pit, guarantees central shaft and tooth bar location reliably, and thimble separates with central shaft, is convenient to the installation of spring.Thimble can be retracted in stop nut, and spacing kinetic energy can be used.
The present invention is by sensor, rocking arm, and multidiameter, support, bearing, central shaft, stop nut, linear bearing, spring, thimble, installation sleeve, the parts such as tooth bar form.Stop nut is threaded connection installation sleeve, linear bearing is arranged on stop nut inside, central shaft coordinates the acquisition rectilinear motion with linear bearing, central shaft one end and thimble are threaded connection, mounting spring on central shaft, the central shaft other end is connected with rocking arm by rolling bearing, and sensor is fixed on rocking arm by sensor axis.Spring compressing thimble, make thimble reliably contact all the time tooth bar, and under the effect of spring, central shaft is followed the tooth bar motion.Adopt the linear bearing kinematic pair can guarantee central shaft friction rectilinear motion.Be designed with ring groove on central shaft, for rolling bearing is installed, rolling bearing moves with central shaft, and by the swing of rocking arm, rectilinear motion is converted into and rotatablely moves.The rotating shaft of sensor swings and rotates with rocking arm, and then records the pendulum angle signal of rocking arm, and conversion can obtain rack displacement.By the rotary stopper nut, can adjust the position of stop nut in installation sleeve and limit the tooth bar maximum displacement, spring fitting, in stop nut, can be saved space, and thimble can be retracted in stop nut, guarantees that spacing kinetic energy can use.Utilize the center pit of tooth bar axle head, thimble can insert the tooth bar center pit, guarantees that location is reliable, and thimble separates with the tooth bar center pit, can be used for the installation of spring.Have rectangular channel on rocking arm, for the clamping of sensor axis.
Claims (3)
1. a dual-fuel engine mechanical pump tooth bar position-measurement device, it is characterized in that: comprise support, angular displacement sensor, rocking arm, central shaft, described support is L-type, the axle of angular displacement sensor passes an end of support and is fixed on the upper end of rocking arm, the other end of support is enclosed within on central shaft, central shaft comprises straight line portion and is arranged on two retained parts of straight line portion left part, two retained parts are provided with recessed groove, rolling bearing is connected with the lower end of rocking arm by multidiameter and rolling bearing is arranged between two recessed grooves, central shaft right part outside arranges installation sleeve, between installation sleeve and central shaft, stop nut is set, the outer wall of stop nut matches by screw thread with the inwall of installation sleeve, thimble is installed in the right part of central shaft, the stop nut inwall is provided with boss, the outside mounting spring of central shaft right part, the left part of spring and right part withstand on respectively on boss and thimble.
2. a kind of dual-fuel engine mechanical pump tooth bar position-measurement device according to claim 1, is characterized in that: between central shaft and stop nut, linear bearing is installed.
3. a kind of dual-fuel engine mechanical pump tooth bar position-measurement device according to claim 1 and 2, it is characterized in that: support casing between stop nut and installation sleeve, and can make support closely be connected with installation sleeve by stop nut and the cooperation of installation sleeve in the part of central shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310451130.2A CN103471540B (en) | 2013-09-29 | 2013-09-29 | A kind of rack position of mechanical pump of dual-fuel engine measurement mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310451130.2A CN103471540B (en) | 2013-09-29 | 2013-09-29 | A kind of rack position of mechanical pump of dual-fuel engine measurement mechanism |
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| Publication Number | Publication Date |
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| CN103471540A true CN103471540A (en) | 2013-12-25 |
| CN103471540B CN103471540B (en) | 2015-12-02 |
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| CN201310451130.2A Expired - Fee Related CN103471540B (en) | 2013-09-29 | 2013-09-29 | A kind of rack position of mechanical pump of dual-fuel engine measurement mechanism |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002004773A (en) * | 2000-06-20 | 2002-01-09 | Ishikawajima Harima Heavy Ind Co Ltd | Method and device for detecting displacement of cutter driving shaft |
| CN1808051A (en) * | 2006-02-16 | 2006-07-26 | 重庆大学 | Automobile pedal position induction device |
| CN102278189A (en) * | 2011-04-28 | 2011-12-14 | 上海交通大学 | Direct injection engine with diesel-gasoline dual-fuel sequence combustion |
| CN202571319U (en) * | 2012-03-19 | 2012-12-05 | 浙江嘉力宝精机股份有限公司 | Pressing force-adjustable movable center mechanism |
| CN203083550U (en) * | 2012-12-28 | 2013-07-24 | 刘仲馨 | Syringe specification identifying device based on angular displacement sensors |
-
2013
- 2013-09-29 CN CN201310451130.2A patent/CN103471540B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002004773A (en) * | 2000-06-20 | 2002-01-09 | Ishikawajima Harima Heavy Ind Co Ltd | Method and device for detecting displacement of cutter driving shaft |
| CN1808051A (en) * | 2006-02-16 | 2006-07-26 | 重庆大学 | Automobile pedal position induction device |
| CN102278189A (en) * | 2011-04-28 | 2011-12-14 | 上海交通大学 | Direct injection engine with diesel-gasoline dual-fuel sequence combustion |
| CN202571319U (en) * | 2012-03-19 | 2012-12-05 | 浙江嘉力宝精机股份有限公司 | Pressing force-adjustable movable center mechanism |
| CN203083550U (en) * | 2012-12-28 | 2013-07-24 | 刘仲馨 | Syringe specification identifying device based on angular displacement sensors |
Non-Patent Citations (1)
| Title |
|---|
| 石勇等: "船用柴油机齿条位置执行器与转速ＢＰ神经网络控制研究", 《内燃机工程》, vol. 34, no. 4, 31 August 2013 (2013-08-31) * |
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| CN103471540B (en) | 2015-12-02 |
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