CN105618375A - Screening machine and cleaning device for screen of screening machine - Google Patents

Screening machine and cleaning device for screen of screening machine Download PDF

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Publication number
CN105618375A
CN105618375A CN201410603734.9A CN201410603734A CN105618375A CN 105618375 A CN105618375 A CN 105618375A CN 201410603734 A CN201410603734 A CN 201410603734A CN 105618375 A CN105618375 A CN 105618375A
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CN
China
Prior art keywords
screen
resonance
cleaning plant
ing
screen cloth
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.)
Pending
Application number
CN201410603734.9A
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Chinese (zh)
Inventor
叶龙
黄毅
徐建华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zoomlion Heavy Industry Science and Technology Co Ltd
Original Assignee
Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zoomlion Heavy Industry Science and Technology Co Ltd filed Critical Zoomlion Heavy Industry Science and Technology Co Ltd
Priority to CN201410603734.9A priority Critical patent/CN105618375A/en
Publication of CN105618375A publication Critical patent/CN105618375A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a cleaning device for a screen of a screening machine and the screening machine. The cleaning device comprises resonance pieces and elastic connecting pieces (2). The resonance pieces are installed on the screen (1) and connected with the screen (1) through the elastic connecting pieces (2). The invention further provides the screening machine. According to the cleaning device for the screening machine and the screening machine, the resonance pieces are installed on the screen, the frequency of the cleaning device is made to be approximate to or equal to the frequency of the screening machine by adjusting the quality and rigidity of the resonance pieces according to the resonance effect principle, so that resonance of the resonance pieces is achieved or approximately achieved. By the adoption of the technical scheme, the screen is patted by the resonance pieces to the maximum extent and does not need to be driven by other power sources, the structure is simple, and installing and maintaining are convenient; in addition, the screen can be effectively cleaned, and meshes of the screen are prevented from being blocked; furthermore, the effect of cleaning a feed inlet of the screen and preventing the feed inlet of the screen from being blocked is remarkably improved, and the performance of the screening machine can also be improved.

Description

The cleaning plant of screen(ing) machine and screen cloth thereof
Technical field
The present invention relates to engineering machinery field, in particular it relates to the cleaning plant of a kind of screen cloth for screen(ing) machine and a kind of screen(ing) machine.
Background technology
At present, generally adopt vibrosieve that material is sieved. Wherein, for the anti-blocking of screen cloth or cleaning, principle generally adopts screen(ing) machine self power realize patting plus beating device, or utilize other power source systems to realize patting function. But, this beating device is typically mounted on charging aperture, and therefore the screen cloth cleaning at charging aperture place or blocking-proof result are less obvious, although and utilize other power sources to realize patting the cleaning of function screen cloth or blocking-proof result is obvious, but systematic comparison is complicated, Financial cost is higher.
Summary of the invention
It is an object of the invention to provide the cleaning plant of a kind of screen cloth for screen(ing) machine, screen cloth need not just can be cleared up by external impetus by this cleaning plant.
To achieve these goals, the present invention provides the cleaning plant of a kind of screen cloth for screen(ing) machine, and wherein, this cleaning plant includes resonance part and Flexible Connector, and this resonance part is connected with described screen cloth by this Flexible Connector.
Preferably, described resonance part includes multiple resonance ball and the rigid connector being connected between adjacent two described resonance balls, and the plurality of resonance ball is linked together by described rigid connector.
Preferably, multiple described resonance balls are arranged altogether point-blank, described rigid connector is connected in turn and is adjacent between two described resonance balls, described Flexible Connector is two, said two Flexible Connector is connected with the two of two ends described resonance balls respectively and said two Flexible Connector is all connected altogether point-blank with multiple described resonance balls, one end of described Flexible Connector is connected with described resonance ball, and the other end of described Flexible Connector connects and is connected with described screen cloth.
Preferably, multiple described resonance balls are arranged equally spacedly.
Preferably, the length of each described rigid connector is equal.
Preferably, multiple described resonance balls are arranged altogether point-blank along the width of described screen cloth.
Preferably, the length of two described Flexible Connectors is equal.
Preferably, the quality m of described resonance part is:
m = c 2 ζp
Wherein, c is the damped coefficient of Flexible Connector, and �� is the actual damping ratio with the critical damping of screen(ing) machine system of screen(ing) machine system, and p is the driving frequency of screen(ing) machine.
Preferably, described dampingratio�� span is 0.2��0.4, and/or described damped coefficient c span is 100��1000.
Preferably, the rigidity k of described cleaning plant is:
k = cp 2 ζ
Wherein, c is the damped coefficient of Flexible Connector, and �� is the actual damping ratio with the critical damping of screen(ing) machine system of screen(ing) machine system, and p is the driving frequency of screen(ing) machine.
Preferably, described dampingratio�� span is 0.2��0.4, and/or described damped coefficient c span is 100��1000.
The present invention also provides for a kind of screen(ing) machine, and this screen(ing) machine includes screen cloth, wherein, described screen cloth is provided with cleaning plant of the present invention.
The present invention by installing resonance part on screen cloth, according to the principle of resonance effect, by the quality of resonance part and the adjustment of rigidity are made the frequency of cleaning plant and screen(ing) machine own frequency close to or equal so that resonance part occurs to resonate or close to resonance. Pass through technique scheme, the beating that screen cloth is carried out amplitude peak by resonance part is driven without other power sources, not only simple in construction is easily installed and safeguards, and can effectively clear up screen cloth, prevent screen cloth plug-hole, and the cleaning at the charging aperture place to screen cloth and blocking-proof result are significantly improved, additionally it is possible to improve the performance of screen(ing) machine.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, is used for explaining the present invention, but is not intended that limitation of the present invention together with detailed description below. In the accompanying drawings:
Fig. 1 is the schematic diagram of the cleaning plant on screen cloth according to the preferred embodiment of the present invention;
Fig. 2 is the mechanics simplified model schematic diagram of forced vibration.
Description of reference numerals
1 screen cloth 2 Flexible Connector
3 resonance ball 4 rigid connectors
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail. It should be appreciated that detailed description of the invention described herein is merely to illustrate and explains the present invention, it is not limited to the present invention.
In the present invention, when not making contrary explanation, the noun of locality of use generally should be understood in conjunction with the situation in accompanying drawing and practical application.
The present invention provides the cleaning plant of a kind of screen cloth for screen(ing) machine, and wherein, this cleaning plant includes resonance part and Flexible Connector 2, and this resonance part is connected with described screen cloth 1 by this Flexible Connector 2.
According to technical scheme, resonance part is arranged on screen cloth 1, and the part itself that resonates has an eigentone. It addition, this resonance part is connected with screen cloth 1 also by Flexible Connector 2, namely the vibration of screen(ing) machine also can be delivered to resonance part by Flexible Connector 2, so that resonance part makees forced vibration.
Therefore, by the adjustment to cleaning plant inherent parameters, such as by the adjustment of the total quality of cleaning plant and rigidity, make when the vibration that natural frequency and the screen(ing) machine 1 of screen(ing) machine 1 is delivered on resonance part by Flexible Connector 2 frequency close to or equal time, there is resonance or close to resonance in resonance part, the Oscillation Amplitude of the part that now resonates is maximum or close to peak swing. Therefore, it can under not applying powered attendant-controlled wheelchairs situation, pat screen cloth with carrying out amplitude peak by self vibration of the part that resonates, to realize the effect of better cleaning screen cloth and plug-hole.
The present invention by installing resonance part on screen cloth, according to the principle of resonance effect, by the quality of resonance part and the adjustment of rigidity are made the frequency of cleaning plant and screen(ing) machine own frequency close to or equal so that resonance part occurs to resonate or close to resonance. Pass through technique scheme, the beating that screen cloth is carried out amplitude peak by resonance part is driven without other power sources, not only simple in construction is easily installed and safeguards, and can effectively clear up screen cloth, prevent screen cloth plug-hole, and the cleaning at the charging aperture place to screen cloth and blocking-proof result are significantly improved, additionally it is possible to improve the performance of screen(ing) machine.
Preferably, described resonance part includes multiple resonance ball 3 and the rigid connector 4 being connected between adjacent two described resonance balls 3, and the plurality of resonance ball 3 is linked together by described rigid connector 4.
In above-mentioned preferred implementation, resonance part includes resonance ball 3 and rigid connector 4. Rigid connector 4 is connected between adjacent multiple resonance balls 3, so that multiple resonance ball 3 can connect into one or more resonance set of balls, resonance part can include one or more resonance set of balls. Each resonance set of balls have at least a resonance ball 3 be connected to screen cloth 1 by Flexible Connector 2.
Rigidity due to rigid connector 4 self, therefore the entirety of a rigidity it is connected as at the resonance ball 3 connected by rigid connector 4, namely it is monolithically fabricated resonance part by multiple resonance balls 3 and the rigid connector 4 that is connected between the plurality of resonance ball 3, and the natural frequency of the part that resonates should be calculated with the entirety of the plurality of resonance ball 3 and the rigid connector 4 being connected between the plurality of resonance ball 3. Further, the frequency of vibration between multiple resonance set of balls is all identical with vibration phase.
That is, the position needing cleaning on screen cloth 1 arranges resonance ball 3, and utilize rigid connector 4 to couple together in resonance ball 3 according to practical application and constitute resonance part, in the process of screen(ing) machine work, resonance ball 3 and rigid connector 4 in resonance part carry out vibration screen cloth as entirety, thus playing cleaning screen cloth 1 and preventing the effect of plug-hole.
Preferably, multiple described resonance balls 3 are arranged altogether point-blank, described rigid connector 4 is connected in turn and is adjacent between two described resonance balls 3, described Flexible Connector 2 is two, said two Flexible Connector 2 is connected with the two of two ends described resonance balls 3 respectively and said two Flexible Connector 2 is all connected altogether point-blank with multiple described resonance balls 3, one end of described Flexible Connector 2 is connected with described resonance ball 3, and the other end of described Flexible Connector 2 connects and is connected with described screen cloth 1.
In above-mentioned preferred implementation, as shown in Figure 1, it is preferably three 3 one groups of ball of resonance ground and is in turn connected to form a resonance part by two rigid connectors 4, and preferably, multiple described resonance balls 3 are arranged equally spacedly, namely the resonance of three in this resonance set of balls ball 3 is arranged equally spacedly, and therefore described rigid connector 4 is connected between adjacent said two resonance ball 3 and length is equal. Resonating in ball 3 at these three, two the resonance balls 3 being positioned at both sides are connected on screen cloth 1 respectively through Flexible Connector 2. Preferably, the end of this Flexible Connector 2 is connected on screen cloth 1 by connectors such as bolts, and preferably, the length of two described Flexible Connectors 2 is equal.
The plurality of resonance ball 3 can the arbitrary rectilinear direction along screen cloth 1 extend, it is preferable that multiple described resonance balls 3 are arranged altogether point-blank along the width of described screen cloth 1.
More than it is only exemplified by the one of the present invention preferred embodiment, those skilled in the art can adopt various ways to implement technical scheme within the scope of the invention, for instance the quantity etc. of the ball 3 that resonates in each resonance part can be configured according to actual needs.
Main thought according to the present invention, so that resonance part can vibrate under the effect of the vibration that screen cloth 1 directly transmits and the vibration of Flexible Connector 2 transmission, in order to the effect close to or up resonance is so that cleaning plant can pat screen cloth peak swing, can deriving away from computing formula according to Reformation of Mechanical Vibration to arranging of resonance part:
If Fig. 2 is the mechanical simplified model of forced vibration. In fig. 2, f (t)=Fsinpt, wherein f (t) acts on the external force on object in time, and F is the amplitude of external force, and p is the excitation load frequency of screen(ing) machine, and t is the moment of forced vibration.
First, according to the knowledge of Reformation of Mechanical Vibration it can be seen that when undamped, system meets:
m x · · ( t ) + kx ( t ) = 0
Wherein x (t) is object forced vibration displacement in time, and m is the gross mass of this cleaning plant, and k is Flexible Connector 2 stiffness coefficient.
Wherein, orderThen can derive:
w n = k / m - - - ( 1 )
In equation (1), wnFor this cleaning plant natural frequency.
System shown in Fig. 2 is for there being damping forced movement, wherein:
K=p2m
Make x (t)=Xejpt, f (t)=Fejpt, then systematic steady state response amplitude is:
X = - F ( k - p 2 m ) 2 + p 2 c 2 - - - ( 2 )
Again because r = p w n - - - ( 3 )
ξ = c 2 mw n - - - ( 4 )
X = F k - - - ( 5 )
Then simultaneous equation (1)��(5):
X = F k ( 1 - r 2 ) 2 + ( 2 ξr ) 2 - - - ( 6 )
In above-mentioned equation, c is the damped coefficient of Flexible Connector 2, and r is frequency ratio, the i.e. ratio of the frequency of cleaning plant and the natural frequency of screen(ing) machine, �� is damping ratio, i.e. the ratio of the critical damping of the actual damping of resonator system and resonator system, and X is system equivalent static displacement.
By vibration knowledge it can be seen that be delivered to the power of this device through screen(ing) machine have two parts:
A part is the resilient urging force through Flexible Connector transmission:
Wherein,Phase contrast for excitation with forced vibration.
Another part is the damping force through Flexible Connector transmission:
Therefore maximum or the amplitude of this device power are passed to:
X T = ( kX ) 2 + ( cpX ) 2 - - - ( 9 )
Simultaneous (1), (3), (4) and (9),
X T = ( kX ) 2 + ( cpX ) 2 = kX 1 + ( 2 ξr ) 2 - - - ( 10 )
Simultaneous (6) and (10) obtain
X T = ( kX ) 2 + ( cpX ) 2 = F 1 + ( 2 ξr ) 2 ( 1 - r 2 ) 2 + ( 2 ξr ) 2 - - - ( 11 )
As r=1, i.e. wn=p, this apparatus system generation covibration, now
k m = p - - - ( 12 )
Therefore, it is derived from by formula (3), (4), (5), (12):
This mass of system m meets:
Wherein, the rigidity k of this device meets:Dampingratio�� span is 0.2��0.4; Damped coefficient c span is 100��1000.
The present invention also provides for a kind of screen(ing) machine, and this screen(ing) machine includes screen cloth 1, wherein, described screen cloth 1 is provided with according to cleaning plant of the present invention.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing; but; the present invention is not limited to the detail in above-mentioned embodiment; in the technology concept of the present invention; technical scheme can being carried out multiple simple variant, these simple variant belong to protection scope of the present invention.
It is further to note that, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, it is possible to be combined by any suitable mode, in order to avoid unnecessary repetition, various possible compound modes are no longer illustrated by the present invention separately.
Additionally, can also carry out combination in any between the various different embodiment of the present invention, as long as it is without prejudice to the thought of the present invention, it should be considered as content disclosed in this invention equally.

Claims (12)

1. the cleaning plant for the screen cloth of screen(ing) machine, it is characterised in that this cleaning plant includes resonance part and Flexible Connector (2), and this resonance part is connected with described screen cloth (1) by this Flexible Connector (2).
2. cleaning plant according to claim 1, it is characterized in that, described resonance part includes multiple resonance ball (3) and the rigid connector (4) being connected between adjacent two described resonance balls (3), and the plurality of resonance ball (3) is linked together by described rigid connector (4).
3. cleaning plant according to claim 2, it is characterized in that, multiple described resonance balls (3) are arranged altogether point-blank, described rigid connector (4) is connected in turn and is adjacent between two described resonance balls (3), described Flexible Connector (2) is two, said two Flexible Connector (2) is connected with the two of two ends described resonance balls (3) respectively and said two Flexible Connector (2) is all connected altogether point-blank with multiple described resonance balls (3), one end of described Flexible Connector (2) is connected with described resonance ball (3), the other end of described Flexible Connector (2) connects and is connected with described screen cloth (1).
4. cleaning plant according to claim 3, it is characterised in that multiple described resonance balls (3) are arranged equally spacedly.
5. cleaning plant according to claim 4, it is characterised in that the length of each described rigid connector (4) is equal.
6. cleaning plant according to claim 3, it is characterised in that multiple described resonance balls (3) are arranged altogether point-blank along the width of described screen cloth (1).
7. cleaning plant according to claim 3, it is characterised in that the length of two described Flexible Connectors (2) is equal.
8. the cleaning plant according to any one in claim 1-7, it is characterised in that the quality m of described resonance part is:
m = c 2 ζp
Wherein, c is the damped coefficient of Flexible Connector, and �� is the actual damping ratio with the critical damping of screen(ing) machine system of screen(ing) machine system, and p is the driving frequency of screen(ing) machine.
9. cleaning plant according to claim 8, it is characterised in that described dampingratio�� span is 0.2��0.4, and/or described damped coefficient c span is 100��1000.
10. to remove in 1-7 the cleaning plant described in any one according to right, it is characterised in that the rigidity k of described cleaning plant is:
k = cp 2 ζ
Wherein, c is the damped coefficient of Flexible Connector, and �� is the actual damping ratio with the critical damping of screen(ing) machine system of screen(ing) machine system, and p is the driving frequency of screen(ing) machine.
11. cleaning plant according to claim 10, it is characterised in that described dampingratio�� span is 0.2��0.4, and/or described damped coefficient c span is 100��1000.
12. a screen(ing) machine, this screen(ing) machine includes screen cloth (1), it is characterised in that described screen cloth is provided with the cleaning plant according to any one in the claims 1-11 on (1).
CN201410603734.9A 2014-10-31 2014-10-31 Screening machine and cleaning device for screen of screening machine Pending CN105618375A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410603734.9A CN105618375A (en) 2014-10-31 2014-10-31 Screening machine and cleaning device for screen of screening machine

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Application Number Priority Date Filing Date Title
CN201410603734.9A CN105618375A (en) 2014-10-31 2014-10-31 Screening machine and cleaning device for screen of screening machine

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Publication Number Publication Date
CN105618375A true CN105618375A (en) 2016-06-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110354593A (en) * 2019-06-27 2019-10-22 三一重机有限公司 A kind of automatically cleaning dust-extraction unit and vehicle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2252137A1 (en) * 1973-11-27 1975-06-20 Tripette & Renaud Resonant sifting or riddling equipment - has boxes joined by elastic devices resonating with frequency being used
US4122006A (en) * 1977-09-28 1978-10-24 Black Clawson, Inc. Screening apparatus
JPS604627Y2 (en) * 1981-07-10 1985-02-09 株式会社気工社 Resonant vibrating sieve bar screen
CN203304183U (en) * 2013-06-09 2013-11-27 东海县海王石英制品有限公司 Sieve frame
CN103639115A (en) * 2013-11-28 2014-03-19 海安县联源机械制造有限公司 Self-excited screen mesh cleaning device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2252137A1 (en) * 1973-11-27 1975-06-20 Tripette & Renaud Resonant sifting or riddling equipment - has boxes joined by elastic devices resonating with frequency being used
US4122006A (en) * 1977-09-28 1978-10-24 Black Clawson, Inc. Screening apparatus
JPS604627Y2 (en) * 1981-07-10 1985-02-09 株式会社気工社 Resonant vibrating sieve bar screen
CN203304183U (en) * 2013-06-09 2013-11-27 东海县海王石英制品有限公司 Sieve frame
CN103639115A (en) * 2013-11-28 2014-03-19 海安县联源机械制造有限公司 Self-excited screen mesh cleaning device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110354593A (en) * 2019-06-27 2019-10-22 三一重机有限公司 A kind of automatically cleaning dust-extraction unit and vehicle

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Application publication date: 20160601