CN105422094A - Direct-drive hydraulic transmission coal mining machine cutting rotary drum height regulating system and method - Google Patents
Direct-drive hydraulic transmission coal mining machine cutting rotary drum height regulating system and method Download PDFInfo
- Publication number
- CN105422094A CN105422094A CN201510783132.0A CN201510783132A CN105422094A CN 105422094 A CN105422094 A CN 105422094A CN 201510783132 A CN201510783132 A CN 201510783132A CN 105422094 A CN105422094 A CN 105422094A
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- China
- Prior art keywords
- rotating speed
- rocking arm
- frequency
- control device
- hydraulic
- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/24—Remote control specially adapted for machines for slitting or completely freeing the mineral
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
Abstract
The invention discloses a direct-drive hydraulic transmission coal mining machine cutting rotary drum height regulating system. The system comprises a variable-frequency control device (4), a servo electric motor (1), a hydraulic pump (2) and a hydraulic motor (3) which are sequentially connected, wherein an output shaft of the hydraulic motor (3) is hinged to a rocker arm (5); the top of the rocker arm (5) is provided with a rotary drum (6); a detection device (7) used for detecting the rotating direction, the rotating speed and torque signals of the rocker arm (5) is also arranged on the rocker arm (5); and the detection device (7) transmits the actual detection value to the variable-frequency control device (4) to be compared with a preset value and to perform feedback control. Meanwhile, the invention also discloses a height regulating method using the system. When the variable-frequency hydraulic system is used, the electric motor drives the hydraulic pump and can directly realize the speed change, direction change and torque change functions of a height regulating mechanism at the same time; a hydraulic loop structure of the system is greatly simplified; meanwhile, the throttle loss in the hydraulic loop is eliminated; and the obvious energy-saving effect is achieved.
Description
Technical field
The present invention relates to a kind of coal-winning machine cutting drum height-adjusting system, specifically a kind of direct drive type hydraulic transmission coal-winning machine cutting drum height-adjusting system and method, belong to mine coal cutter technical field.
Background technology
Along with the fast development of technology and the raising to safety of coal mines importance, down-hole coal excavation work plane realizes few people or Manless mining becomes inexorable trend, and its necessary condition realizes down-hole coal excavation equipment mechanization and automation.
Coal-winning machine is equipped as main coal breakage, and the intelligence that its automatic control mainly comprises inverter-fed traction and cutting drum is heightened.Wherein, cutting drum automatic adjustment height refers to when shearer haulage moves, and front and back cylinder needs the highly automated adjustment along work plane coal-rock interface, avoids cutting top board and base plate, to obtain maximum recovery ratio.
Meanwhile, when coal-winning machine carries out cut work, due to the mixture of its cut object normally coal or the field trash such as coal and rock, the change of cut medium will cause cylinder load to undergo mutation.Therefore, at coal-winning machine in the course of the work, need by Roller shear mechanism, in the altitude range of coal seam, upper and lower adjustment roller height adapts to the change in coal seam, to reach best coal cutting effect.
Usually, by Roller shear mechanism valve control hydraulic system, its speed change, break-in and change torque realize controlling by the high-power dissipative cell such as flow control valve, directional control valve and pressure-control valve, and system hydraulic circuit structure is comparatively complicated, there is serious restriction loss in hydraulic circuit.
Summary of the invention
For above-mentioned prior art Problems existing, the invention provides a kind of direct drive type hydraulic transmission coal-winning machine cutting drum height-adjusting system and method, can eliminate exist in hydraulic circuit restriction loss, simplify system hydraulic circuit structure, and then realize obvious energy-saving effect.
To achieve these goals, the technical solution used in the present invention is: a kind of direct drive type hydraulic transmission coal-winning machine cutting drum height-adjusting system, and it comprises:
The frequency-converting control device, servomotor, hydraulic pump, the hydraulic motor that are connected successively;
The output shaft of described hydraulic motor is hinged with rocking arm, and the top of rocking arm is provided with cylinder;
Described rocking arm is also provided with the checkout gear detecting the turning to of rocking arm, rotating speed and dtc signal, the preset value that the actual value of detection is sent to frequency-converting control device by inspection by described checkout gear compares, FEEDBACK CONTROL.
Loop between hydraulic pump, hydraulic motor is also provided with the main safety valve setting up system working pressure.
Described hydraulic motor is provided with the safety valve for system oil return.
The invention also discloses a kind of direct drive type hydraulic transmission coal-winning machine cutting drum and heighten method, comprise following control procedure:
1) course changing control of rocking arm:
By frequency-converting control device, turning to of rocking arm is preset, send control signal by frequency-converting control device, change the direction of rotation of servomotor, and then change the direction of rotation of hydraulic pump, realize the course changing control of rocking arm;
2) rotating speed of rocking arm controls:
By the speed setting preset value of frequency-converting control device to rocking arm, when load becomes large, send control signal by frequency-converting control device, the rotating speed of servomotor is raised, and then the rotating speed of hydraulic pump is raised; When load declines, send control signal by frequency-converting control device, the rotating speed of servomotor is reduced, and then the rotating speed of hydraulic pump is reduced, the rotating speed realizing rocking arm controls;
3) direct torque of rocking arm:
By the torque settings preset value of frequency-converting control device to rocking arm, when system pressure raises, send control signal by frequency-converting control device, the rotating speed of servomotor is reduced, and then the rotating speed of hydraulic pump is reduced; When the system pressure drops, send control signal by frequency-converting control device, the rotating speed of servomotor is raised, and then the rotating speed of hydraulic pump is raised, realize the direct torque of rocking arm;
4) design preset value compare with actual value, FEEDBACK CONTROL:
Detected the actual value of the turning to of rocking arm, rotating speed and torque rotary speed by checkout gear, and the actual value of the turning to of rocking arm, rotating speed and torque rotary speed be transported to frequency-converting control device, and compare with frequency-converting control device preset value, FEEDBACK CONTROL.
Compared with existing high-power dissipative cell control system: converter technique combines with hydraulic system by the present invention, make full use of large power output/torque two particular advantages of the convenience of Serve Motor Control, flexibility and hydraulic system, composition variable frequency hydraulic system, servomotor is while driving hydraulic pump, directly can realize the function of height-regulating mechanism speed change, break-in, change torque, greatly simplify system hydraulic circuit structure;
Simultaneously, in main loop, no longer use traffic control valve, directional control valve and pressure-control valve three consumes energy greatly control element, eliminate the restriction loss existed in hydraulic circuit, in addition, the motor operation when height-regulating mechanism needs work, when height-regulating mechanism quits work, motor shutdown, do not have the loss of dry run, these two features can realize obvious energy-saving effect.
Accompanying drawing explanation
Fig. 1 is direct drive type hydraulic transmission coal-winning machine cutting drum height-adjusting system schematic diagram of the present invention.
In figure: 1, servomotor; 2, hydraulic pump; 3, hydraulic motor; 4, frequency-converting control device; 5, rocking arm; 6, cylinder; 7, checkout gear; 8, fuel tank; 9, strainer; 10, main safety valve; 11, safety valve.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, the present invention is a kind of direct drive type hydraulic transmission coal-winning machine cutting drum height-adjusting system, and it comprises:
The frequency-converting control device 4, servomotor 1, hydraulic pump 2, the hydraulic motor 3 that are connected successively;
The output shaft of described hydraulic motor 3 is hinged with Rocker arm 5, and the top of Rocker arm 5 is provided with cylinder 6;
Described Rocker arm 5 is also provided with the checkout gear 7 detecting the turning to of Rocker arm 5, rotating speed and dtc signal, and the preset value that the actual value of detection is sent to frequency-converting control device 4 compares by described checkout gear 7, FEEDBACK CONTROL.
Wherein, the loop between described hydraulic pump 2, hydraulic motor 3 is also provided with the main safety valve 10 setting up system working pressure, described hydraulic motor 3 is provided with the safety valve 11 for system oil return.
During work: send control signal by frequency-converting control device 4, control servomotor 1 to rotate, drive hydraulic pump 2 through filter 9 oil suction from fuel tank 8, thus drive hydraulic motor 3 to rotate, output shaft and the Rocker arm 5 of hydraulic motor 3 are hinged, thus drive Rocker arm 5 cylinder 6 to be completed heighten operation;
Because servomotor 1 is directly connected with hydraulic pump 2, controlling turning to of servomotor 1 can the turning to of hydraulic control pump 2, also just the turning to of further hydraulic control motor 3 and Rocker arm 5; Hydraulic pump 2 is relevant with flow with the rotating speed of hydraulic motor 3, can be realized the control of Rocker arm 5 rotating speed, also just can be realized the control of Rocker arm 5 torque by the control of rotating speed by the flow of hydraulic control pump 2 and hydraulic motor 3;
Wherein, the operating pressure of main system can be set up by main safety valve 10, and the fluid in loop can through safety valve 11 oil sump tank 8.
Meanwhile, the invention also discloses a kind of utilize direct drive type hydraulic transmission coal-winning machine cutting drum height-adjusting system to carry out heighten method, specifically comprise following process:
1) course changing control of Rocker arm 5:
Preset by turning to of frequency-converting control device 4 pairs of Rocker arm 5s, send control signal by frequency-converting control device 4, change the direction of rotation of servomotor 1, and then change the direction of rotation of hydraulic pump 2, realize the course changing control of Rocker arm 5;
2) rotating speed of Rocker arm 5 controls:
By the speed setting preset value of frequency-converting control device 4 pairs of Rocker arm 5s, the output flow Q of hydraulic pump 2
pfor:
Q
p＝q
pn
p-k
lpp
p
Wherein, q
pfor the discharge capacity of hydraulic pump 2; n
pfor the rotating speed of hydraulic pump 2; k
lpp
pfor the leakage rate of hydraulic pump 2; p
pfor system pressure;
When load becomes large, system pressure p
praise, leakage rate k
lpp
pmust increase, in order to ensure output flow Q
pconstant, then q
pn
pmust raise, i.e. the rotating speed n of hydraulic pump 2
p(quantitative pump delivery q must be raised
pfor constant), now send control signal by frequency-converting control device 4, the rotating speed of servomotor 1 is raised, and then the rotating speed of hydraulic pump 2 is raised;
In like manner, when load declines, system pressure p
preduce, leakage rate k
lpp
preduce, in order to ensure output flow Q
pconstant, then q
pn
pmust decline, i.e. the rotating speed n of hydraulic pump 2
pmust be declined (quantitative pump delivery q
pfor constant), send control signal by frequency-converting control device 4, the rotating speed of servomotor 1 is reduced, and then the rotating speed of hydraulic pump 2 is reduced, thus the rotating speed that can realize Rocker arm 5 controls;
3) direct torque of Rocker arm 5:
By the torque settings preset value of frequency-converting control device 4 pairs of Rocker arm 5s, the power output P of hydraulic pump 2 is:
P＝q
pn
pp
p-k
lpp
p 2
Due to k
lpp
p 2relative to q
pn
pp
pless, as system pressure p
pduring rising, in order to ensure that power output P is constant, the rotating speed n of hydraulic pump 2
pmust decline, send control signal by frequency-converting control device 4, the rotating speed of servomotor 1 is reduced, thus the rotating speed of hydraulic pump 2 is reduced; In like manner, as system pressure p
pduring reduction, in order to ensure that power output P is constant, the rotating speed n of hydraulic pump 2
pmust raise, send control signal by frequency-converting control device 4, the rotating speed of servomotor 1 is raised, thus the rotating speed of hydraulic pump 2 is raised, thus the direct torque of Rocker arm 5 can be realized;
4) design preset value compare with actual value, FEEDBACK CONTROL:
Detected the actual value of the turning to of Rocker arm 5, rotating speed and torque rotary speed by checkout gear 7, and the actual value of the turning to of Rocker arm 5, rotating speed and torque rotary speed be transported to frequency-converting control device 4, and compare with preset value, FEEDBACK CONTROL.
In sum: converter technique combines with hydraulic system by the present invention, make full use of large power output/torque two particular advantages of convenience that servomotor 1 controls, flexibility and hydraulic system, composition variable frequency hydraulic system, servomotor 1 is while driving hydraulic pump, directly can realize the function of height-regulating mechanism speed change, break-in, change torque, greatly simplify system hydraulic circuit structure;
Simultaneously, in main loop, no longer use traffic control valve, directional control valve and pressure-control valve three consumes energy greatly control element, eliminate the restriction loss existed in hydraulic circuit, in addition, the motor operation when height-regulating mechanism needs work, when height-regulating mechanism quits work, motor shutdown, do not have the loss of dry run, these two features can realize obvious energy-saving effect.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.
The above; be only preferred embodiment of the present invention; not in order to limit the present invention, every above embodiment is done according to technical spirit of the present invention any trickle amendment, equivalently replace and improve, within the protection domain that all should be included in technical solution of the present invention.
Claims (4)
1. a direct drive type hydraulic transmission coal-winning machine cutting drum height-adjusting system, it is characterized in that, it comprises:
The frequency-converting control device (4), servomotor (1), hydraulic pump (2), the hydraulic motor (3) that are connected successively;
The output shaft of described hydraulic motor (3) is hinged with rocking arm (5), and the top of rocking arm (5) is provided with cylinder (6);
Described rocking arm (5) is also provided with the checkout gear (7) detecting rocking arm the turning to of (5), rotating speed and dtc signal, the preset value that the actual value of detection is sent to frequency-converting control device (4) by described checkout gear (7) compares, FEEDBACK CONTROL.
2. a kind of direct drive type hydraulic transmission coal-winning machine cutting drum height-adjusting system according to claim 1, is characterized in that, the loop between described hydraulic pump (2), hydraulic motor (3) is also provided with the main safety valve (10) setting up system working pressure.
3. a kind of direct drive type hydraulic transmission coal-winning machine cutting drum height-adjusting system according to claim 1, it is characterized in that, described hydraulic motor (3) is provided with the safety valve (11) for system oil return.
4. a method heightened by direct drive type hydraulic transmission coal-winning machine cutting drum, it is characterized in that, comprises following control procedure:
1) course changing control of rocking arm (5):
By frequency-converting control device (4), turning to of rocking arm (5) is preset, control signal is sent by frequency-converting control device (4), change the direction of rotation of servomotor (1), and then change the direction of rotation of hydraulic pump (2), realize the course changing control of rocking arm (5);
2) rotating speed of rocking arm (5) controls:
By the speed setting preset value of frequency-converting control device (4) to rocking arm (5), when load becomes large, send control signal by frequency-converting control device (4), the rotating speed of servomotor (1) is raised, and then the rotating speed of hydraulic pump (2) is raised; When load declines, send control signal by frequency-converting control device (4), the rotating speed of servomotor (1) is reduced, and then the rotating speed of hydraulic pump (2) is reduced, the rotating speed realizing rocking arm (5) controls;
3) direct torque of rocking arm (5):
By the torque settings preset value of frequency-converting control device (4) to rocking arm (5), when system pressure raises, send control signal by frequency-converting control device (4), the rotating speed of servomotor (1) is reduced, and then the rotating speed of hydraulic pump (2) is reduced; When the system pressure drops, send control signal by frequency-converting control device (4), the rotating speed of servomotor (1) is raised, and then the rotating speed of hydraulic pump (2) is raised, realize the direct torque of rocking arm (5);
4) design preset value compare with actual value, FEEDBACK CONTROL:
Detected the actual value of rocking arm the turning to of (5), rotating speed and torque rotary speed by checkout gear (7), and the actual value of the turning to of rocking arm (5), rotating speed and torque rotary speed be transported to frequency-converting control device (4), and compare with preset value, FEEDBACK CONTROL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510783132.0A CN105422094B (en) | 2015-11-16 | 2015-11-16 | A kind of direct drive type hydraulic transmission coal-winning machine cutting drum height-adjusting system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510783132.0A CN105422094B (en) | 2015-11-16 | 2015-11-16 | A kind of direct drive type hydraulic transmission coal-winning machine cutting drum height-adjusting system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105422094A true CN105422094A (en) | 2016-03-23 |
| CN105422094B CN105422094B (en) | 2017-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510783132.0A Active CN105422094B (en) | 2015-11-16 | 2015-11-16 | A kind of direct drive type hydraulic transmission coal-winning machine cutting drum height-adjusting system and method |
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| CN (1) | CN105422094B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108890404A (en) * | 2018-08-06 | 2018-11-27 | 安徽工程大学 | A kind of submissive grinding and polishing operating system and its operational method |
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-
2015
- 2015-11-16 CN CN201510783132.0A patent/CN105422094B/en active Active
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|---|---|---|---|---|
| PL189722B1 (en) * | 1998-09-14 | 2005-09-30 | Zabrzanskie Zaklady Mechaniczn | Longwall mechanical coal miner arm swinging system |
| CN101201069A (en) * | 2007-12-18 | 2008-06-18 | 浙江大学 | Variable frequency pump-control-motor closed circuit based on energy regulation |
| CN201363332Y (en) * | 2009-03-05 | 2009-12-16 | 中国矿业大学 | Large inertia variable frequency volume bypass throttling speed governing system |
| CN101887273A (en) * | 2010-04-20 | 2010-11-17 | 中国矿业大学 | Automatic height-adjusting test device of coal mining machine roller and control method |
| CN102108862A (en) * | 2010-12-30 | 2011-06-29 | 三一重型装备有限公司 | Coal mining equipment and roller electrical speed regulating system |
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Non-Patent Citations (1)
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Cited By (1)
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| CN108890404A (en) * | 2018-08-06 | 2018-11-27 | 安徽工程大学 | A kind of submissive grinding and polishing operating system and its operational method |
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| CN105422094B (en) | 2017-12-19 |
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Address after: 221000 Xuzhou Tongshan University Road, Xuzhou City, Jiangsu Province, Nanhu campus, China University of Mining and Technology Patentee after: China University of Mining & Technology Address before: 221000 Xuzhou University Road,, Jiangsu, China University of Mining and Technology Patentee before: China University of Mining & Technology |