CN108207271B - Automatic early warning device for harvester vibrating screen - Google Patents
Automatic early warning device for harvester vibrating screen Download PDFInfo
- Publication number
- CN108207271B CN108207271B CN201711352246.5A CN201711352246A CN108207271B CN 108207271 B CN108207271 B CN 108207271B CN 201711352246 A CN201711352246 A CN 201711352246A CN 108207271 B CN108207271 B CN 108207271B
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- monitoring
- electrode layer
- vibrating screen
- early warning
- harvester
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D15/00—Digging machines with sieve graters but without conveying mechanisms
- A01D15/04—Digging machines with sieve graters but without conveying mechanisms with moving or vibrating grates
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D33/00—Accessories for digging harvesters
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention relates to the field of early warning and processing of harvester vibrating screens, in particular to an automatic early warning device for a harvester vibrating screen. The utility model provides an automatic early warning device of harvester sieve that shakes, includes the frame and installs the monitoring shaft on the sieve that shakes, is provided with monitoring devices in the frame, monitoring devices including setting up fixed plate and the monitoring part in the frame, the monitoring part be with monitoring shaft movement track special-shaped curved surface that accords with, the fixed plate on install the elastic support, elastic support upper portion and monitoring part phase-match, the monitoring part install on elastic support upper portion, the monitoring part include from elastic support outer electrode layer, PVDF layer and the inner electrode layer that sets gradually by near and far away, the fixed plate on install the seal box, one side of outer electrode layer and inner electrode layer all be provided with wire end, wire end all be connected through wire and seal box electricity. The invention can automatically warn in time when the vibrating screen bearing is damaged.
Description
Technical Field
The invention relates to the field of early warning and processing of harvester vibrating screens, in particular to an automatic early warning device for a harvester vibrating screen.
Background
The vibrating screen is a main working part of the combine harvester, and the quality of the working performance of the vibrating screen has obvious influence on the impurity rate and the loss rate of the combine harvester. At present, early warning and monitoring of the harvester mainly focuses on monitoring the blockage faults of a threshing cylinder and a packing auger. The main fault of the vibrating screen is bearing fragmentation, the bearing of the vibrating screen is hidden in the frame and can not be directly observed by naked eyes, the fault judgment method is that the damage of the bearing of the vibrating screen can be found only when the abnormal sound or effect of the vibrating screen is not expected according to the experience of an operator, a certain time is needed for observation from the damage to the finding, irreversible damage is already generated on the shaft of the vibrating screen in the middle, the screening effect is influenced, the damage vibration rule of the bearing of the vibrating screen is uncertain, and the information of the abnormal vibration can be accurately judged and monitored only through multi-point measurement.
At present, the monitoring technology of the vibration sieve part in the market is few, and relevant useful data is not retrieved.
Disclosure of Invention
The invention mainly aims to solve the problems and provides an automatic early warning device for a vibrating screen of a harvester, which can automatically early warn in time when a vibrating screen bearing is damaged.
The purpose of the invention is mainly realized by the following scheme: the utility model provides an automatic early warning device of harvester sieve that shakes, includes the frame and installs the monitoring shaft on the sieve that shakes, the frame on be provided with monitoring devices, monitoring devices including setting up fixed plate and the monitoring part in the frame, the monitoring part be with monitoring shaft movement track match's dysmorphism curved surface, the fixed plate on install the elastic support, elastic support upper portion and monitoring part phase-match, the monitoring part install on elastic support upper portion, the monitoring part include from elastic support outer electrode layer, PVDF layer and the inner electrode layer that sets gradually by near and far, the fixed plate on install the seal box, outer electrode layer and one side of inner electrode layer all be provided with wire end, wire end all be connected through wire and seal box electricity. The monitoring device comprises a fixed plate and a monitoring part, the fixed plate and the monitoring part are arranged on the rack, the monitoring part is a special-shaped curved surface matched with the motion trail of a monitoring shaft, the monitoring shaft moves regularly along with a vibrating screen, the motion trail of the monitoring shaft can be obtained through theoretical analysis and simulation, an elastic support is installed on the fixed plate, the upper part of the elastic support is matched with the monitoring part, the upper part of the elastic support is also in a special-shaped curved surface shape, the monitoring part is installed on the upper part of the elastic support, the monitoring part comprises an outer electrode layer, a PVDF layer and an inner electrode layer which are sequentially arranged from near to far away from the elastic support, a sealing box is installed on the fixed plate and is responsible for signal conversion, amplification and transmission, lead ends are arranged on one side of the outer electrode layer and one side of the inner electrode layer, the lead ends are electrically connected with the sealing box, The monitoring shaft is flexible, wear-resistant, low in price and easy to shape, and in a normal working state, when the vibrating screen moves along a normal track, the monitoring shaft is not in contact with the monitoring device, and the monitoring device does not work; when the vibrating screen bearing is cracked, the running track of the monitoring shaft changes, the monitoring device is fixed, the track of the monitoring shaft is coincided with the monitoring device at a certain point, namely the monitoring shaft and the monitoring part are collided, the special-shaped curved surface is consistent with the vibration track, the monitoring part can sense the changed information and give an alarm in time no matter which direction the vibration is abnormal, the PVDF layer is acted by force, the electrode on the surface of the PVDF layer is accumulated with induced charge due to the piezoelectric effect, and the PVDF is not conductive, so that the electrode layers on the inner layer and the outer layer are adopted to collect the charge on the surface and are transmitted out by a lead, and the transmitted signal is converted and amplified by a sealing box, thereby sending the alarm information.
Preferably, the lead ends of the outer electrode layer and the inner electrode layer are both provided with an L-shaped notch, and the L-shaped notch is connected with the leads on the outer electrode layer and the inner electrode layer through a rivet and a terminal. The lead wire end parts of the outer electrode layer and the inner electrode layer are provided with L-shaped notches, and the L-shaped notches are connected with the lead wires on the outer electrode layer and the inner electrode layer through rivets and connecting terminals, so that the short circuit phenomenon of the outer electrode layer and the inner electrode layer can be prevented.
Preferably, a protective film layer is arranged on the side surface of the inner electrode layer close to the monitoring shaft. The side face, close to the monitoring shaft, of the inner electrode layer is provided with the protective film layer, impact force generated by the vibrating screen is large, and the protective film layer can protect the monitoring part.
Preferably, a preamplifier is mounted in the sealed box. And a preamplifier is arranged in the sealing box and can play a role in signal amplification.
Preferably, the fixing plate is connected to the frame through a bolt, and the bottom of the elastic support is connected to the fixing plate through a bolt. The fixed plate passes through bolted connection in the frame, and bolted connection is passed through on the fixed plate in elastic support's bottom, and it is convenient to dismantle, connects firmly.
Preferably, the elastic support is made of rubber materials. The elastic support is made of rubber materials, the rubber has high elasticity, electric insulation and other good performances, the harvester still moves after the vibrating screen bearing is damaged, larger impact force can be generated, the harvester can generate irreversible damage to the monitoring part when directly impacting on the monitoring part, the elastic support can absorb part of the impact, and the damage to the monitoring part is effectively reduced.
Preferably, the frame is provided with an alarm module, and the alarm module is electrically connected with the sealing box. The frame is provided with an alarm module which is electrically connected with the sealing box, when the vibrating screen bearing is cracked, the PVDF layer senses impact force to generate electric charge and leads the electric charge out through the outer electrode layer and the inner electrode layer, the electric charge is processed by the sealing box and then transmits the signal to the alarm module, and the alarm module sends out alarm information to inform an operator.
Preferably, the alarm module is an alarm. The alarm module is the alarm, and when the sieve bearing that shakes was cracked, the PVDF layer was experienced the impact and will be produced electric charge and derive electric charge via outer electrode layer and inner electrode layer, and the back is handled to the seal box, gives the alarm with this signal transmission, and the alarm sends the alarm sound, and operating personnel knows that the bearing has taken place the trouble and need shut down the maintenance and change spare part.
Therefore, the automatic early warning device for the vibrating screen of the harvester has the following advantages: the invention has simple structure and low cost, is easy to install, maintain and maintain, the elastic bracket can effectively absorb the impact and vibration of the vibrating screen on the monitoring device, protects the monitoring device, and the monitoring part manufactured by adopting a simulation motion trail special-shaped structure method effectively solves the multipoint monitoring problem of the vibrating screen.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic structural diagram of the monitoring device of the present invention.
Fig. 3 is a schematic view of the structure of the end of the lead wire in the present invention.
Fig. 4 is a schematic structural view of the elastic support in the present invention.
Illustration of the drawings: 1-frame, 2-monitoring device, 3-monitoring shaft, 4-vibrating screen, 5-cam, 6-elastic support, 7-fixing plate, 8-sealing box, 9-outer electrode layer, 10-PVDF layer, 11-inner electrode layer, 12-lead, 13-bolt, 14-rivet, 15-connecting terminal and 16-L-shaped notch.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example 1:
as shown in figure 1, an automatic early warning device for a harvester vibrating screen comprises a frame 1 and a monitoring shaft 3 arranged on a vibrating screen 4, wherein a monitoring device 2 is arranged on the frame, as shown in figures 2 and 4, the monitoring device comprises a fixed plate 7 and a monitoring part which are arranged on the frame, the monitoring part is a special-shaped curved surface which is matched with the motion trail of the monitoring shaft, the monitoring shaft moves regularly along with the vibrating screen, the motion trail of the monitoring shaft can be obtained through theoretical analysis and simulation, an elastic bracket 6 is arranged on the fixed plate, the upper part of the elastic bracket is matched with the monitoring part, the upper part of the elastic bracket is also in a special-shaped curved surface shape, the monitoring part is arranged on the elastic bracket, the monitoring part comprises an outer electrode layer 9, a PVDF layer 10 and an inner electrode layer 11 which are sequentially arranged from near to far from the elastic bracket, a sealing box 8 is arranged on the fixed, the preamplifier can play a role in signal amplification, the sealing box is responsible for signal conversion, amplification and transmission, one side of the outer electrode layer and one side of the inner electrode layer are both provided with lead wire ends, the lead wire ends are both electrically connected with the sealing box through leads 12, as shown in figure 3, the lead wire ends of the outer electrode layer and the inner electrode layer are both provided with L-shaped notches 16, the L-shaped notches are connected with leads on the outer electrode layer and the inner electrode layer through rivets 14 and connecting terminals 15, so that the short circuit phenomenon of the outer electrode layer and the inner electrode layer can be prevented, the side of the inner electrode layer close to the monitoring shaft is provided with a protective film layer, the impact force generated by the vibrating screen is large, the protective film layer can protect a monitoring part, PVDF is polyvinylidene fluoride, the mechanical property is good, the flexibility and the wear resistance, the price is low and the molding is easy, the figure is a crank block type vibrating screen, the vibrating screen generates vibration in a crank sliding block mode, the monitoring shaft rotates regularly along with the vibrating screen, and in a normal working state, when the vibrating screen moves along a normal track, the monitoring shaft is not in contact with the monitoring device, and the monitoring device does not work; when the vibrating screen bearing is cracked, the running track of the monitoring shaft changes, the monitoring device is fixed, at the moment, the track of the monitoring shaft is overlapped with the monitoring device at a certain point, namely the monitoring shaft is impacted with the monitoring part, the special-shaped curved surface is consistent with the vibration track, the monitoring part can sense the changed information and give an alarm in time no matter which direction the vibration is abnormal, no matter the bearing, the shaft and the cam are involved, the monitoring part can generate early warning information as long as the motion track of the vibrating screen changes, the PVDF layer can generate an early warning message due to the fact that an electrode on the surface of the PVDF layer accumulates induced charges under the action of force, the PVDF is non-conductive, therefore, the inner electrode layer and the outer electrode layer are adopted to collect the charges on the surface and transmit the charges through a lead, the transmitted signals are converted and amplified through the sealing box, and alarm information is sent, the alarm module is arranged, the alarm module is an alarm, when the vibrating screen bearing is cracked, the PVDF layer senses impact force to generate charges and leads the charges out through the outer electrode layer and the inner electrode layer, the charges are processed by the sealing box, the signals are transmitted to the alarm, the alarm gives out alarm sound, and an operator knows that the bearing has a fault and needs to be shut down, maintained and replaced; the fixed plate is connected to the rack through a bolt 13, and the bottom of the elastic support is connected to the fixed plate through a bolt, so that the elastic support is convenient to disassemble and stable in connection; the elastic support is made of rubber materials, the rubber has high elasticity, electric insulation and other good performances, the harvester still moves after the vibrating screen bearing is damaged, larger impact force can be generated, the harvester can generate irreversible damage to the monitoring part when directly impacting on the monitoring part, the elastic support can absorb part of the impact, and the damage to the monitoring part is effectively reduced.
It should be understood that this example is only for illustrating the present invention and is not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (7)
1. An automatic early warning device for a harvester vibrating screen is characterized by comprising a frame and a monitoring shaft arranged on the vibrating screen, the frame is provided with a monitoring device, the monitoring device comprises a fixed plate and a monitoring part which are arranged on the frame, the monitoring part is a special-shaped curved surface which is matched with the motion trail of the monitoring shaft, an elastic bracket is arranged on the fixed plate, the upper part of the elastic bracket is matched with the monitoring part which is arranged on the upper part of the elastic bracket, the monitoring part comprises an outer electrode layer, a PVDF layer and an inner electrode layer which are sequentially arranged from near to far from the elastic bracket, the fixed plate on install the seal box, the seal box in install preamplifier, one side of outer electrode layer and inner electrode layer all be provided with lead wire end, lead wire end all be connected through wire and seal box electricity.
2. The automatic early warning device for the harvester vibrating screen as claimed in claim 1, wherein the lead ends of the outer electrode layer and the inner electrode layer are provided with L-shaped notches, and the L-shaped notches are connected with the leads on the outer electrode layer and the inner electrode layer through rivets and terminals.
3. The automatic early warning device for the harvester vibrating screen as claimed in claim 1, wherein a protective film layer is arranged on the side surface of the inner electrode layer close to the monitoring shaft.
4. The automatic early warning device for the vibrating screen of the harvester as claimed in claim 1, 2 or 3, wherein the fixing plate is connected to the frame through a bolt, and the bottom of the elastic support is connected to the fixing plate through a bolt.
5. The automatic early warning device for the vibrating screen of the harvester according to claim 1, 2 or 3, wherein the elastic support is made of rubber materials.
6. The automatic early warning device for the harvester vibrating screen as claimed in claim 1, 2 or 3, wherein an alarm module is arranged on the frame and electrically connected with the sealing box.
7. The automatic early warning device for the harvester vibrating screen as claimed in claim 6, wherein the warning module is an alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711352246.5A CN108207271B (en) | 2017-12-15 | 2017-12-15 | Automatic early warning device for harvester vibrating screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711352246.5A CN108207271B (en) | 2017-12-15 | 2017-12-15 | Automatic early warning device for harvester vibrating screen |
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| Publication Number | Publication Date |
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| CN108207271A CN108207271A (en) | 2018-06-29 |
| CN108207271B true CN108207271B (en) | 2019-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711352246.5A Active CN108207271B (en) | 2017-12-15 | 2017-12-15 | Automatic early warning device for harvester vibrating screen |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110038893B (en) * | 2019-05-31 | 2021-11-30 | 广州市番禺环境科学研究所有限公司 | Circulating type photocatalytic soil remediation system and remediation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1712912A (en) * | 2005-08-05 | 2005-12-28 | 北京工业大学 | Piezoelectric acoustic sensor |
| CN102636279A (en) * | 2012-05-14 | 2012-08-15 | 重庆材料研究院 | Resistance and voltage temperature measurement and over-temperature alarm cable and preparation method thereof |
| CN104914747A (en) * | 2015-04-20 | 2015-09-16 | 海安县联源机械制造有限公司 | Vibration screening system control method |
| JP2015169745A (en) * | 2014-03-06 | 2015-09-28 | スタンレー電気株式会社 | light deflector |
-
2017
- 2017-12-15 CN CN201711352246.5A patent/CN108207271B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1712912A (en) * | 2005-08-05 | 2005-12-28 | 北京工业大学 | Piezoelectric acoustic sensor |
| CN102636279A (en) * | 2012-05-14 | 2012-08-15 | 重庆材料研究院 | Resistance and voltage temperature measurement and over-temperature alarm cable and preparation method thereof |
| JP2015169745A (en) * | 2014-03-06 | 2015-09-28 | スタンレー電気株式会社 | light deflector |
| CN104914747A (en) * | 2015-04-20 | 2015-09-16 | 海安县联源机械制造有限公司 | Vibration screening system control method |
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| CN108207271A (en) | 2018-06-29 |
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