CN114109348A - Power control method of rotary drilling rig and rotary drilling rig - Google Patents
Power control method of rotary drilling rig and rotary drilling rig Download PDFInfo
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- CN114109348A CN114109348A CN202111400362.6A CN202111400362A CN114109348A CN 114109348 A CN114109348 A CN 114109348A CN 202111400362 A CN202111400362 A CN 202111400362A CN 114109348 A CN114109348 A CN 114109348A
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- 238000005553 drilling Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000004044 response Effects 0.000 claims abstract description 22
- 230000000630 rising effect Effects 0.000 claims abstract description 18
- 238000001595 flow curve Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 abstract description 14
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005527 soil sampling Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
Abstract
The invention relates to the technical field of rotary drilling rigs, in particular to a power control method of a rotary drilling rig and the rotary drilling rig, wherein the power of an engine can be ensured not to exceed an allowable value and the rotating speed of the engine can not drop suddenly by setting torque reserve values of the engine at a low gear, a middle gear and a high gear and drawing a rotating speed/torque fitting curve of the engine according to the torque reserve values; by setting the delay response time and the rising slope of the main pump power control current and drawing a slope curve of the main pump power control current according to the delay response time and the rising slope, the engine can be prevented from seriously falling or stalling, and the quick action response of the machine during operation can be ensured; the working gear and the auxiliary pump pressure of the engine are obtained when the machine works, and the auxiliary pump is determined to deduct power according to the working gear and the auxiliary pump pressure, so that the power of the engine can be fully utilized no matter the machine performs single action or compound action, the input torque of a main pump can be ensured not to exceed an allowable value, and the rotating speed of the engine cannot suddenly drop.
Description
Technical Field
The invention relates to the technical field of rotary drilling rigs, in particular to a power control method of a rotary drilling rig and the rotary drilling rig.
Background
The rotary drilling rig is a piling machinery device which uses a rotary bucket, a short spiral drill bit or other operation devices to drill by adopting two processes of dry method and static mud wall protection respectively, and adopts successive soil sampling and repeated circulating operation to form holes as basic functions, and is widely applied to foundation construction engineering of municipal construction, highway bridges, high-rise buildings and the like. In the rotary drilling rig, a main pump and an auxiliary pump are arranged, only the main pump performs single action under general working conditions, and the main pump and the auxiliary pump perform combined action under special working conditions.
The power control of the existing rotary drilling rig mostly outputs signals to a controller through an accelerator knob, the controller outputs rotating speed signals to an engine according to the position of an accelerator, meanwhile, the current value of an electromagnetic valve is output to a hydraulic pump, and then the hydraulic pump outputs required torque according to different current values of different gears.
Under the condition of the existing control scheme, if the power consumption of the auxiliary pump is not calculated during matching, when a composite action is executed, the main pump works in a variable area, and meanwhile, the auxiliary pump carries load, so that the input torque of the main pump exceeds an allowable value, the rotating speed of an engine can be suddenly reduced, and even the main pump shaft is broken when the input torque of the main pump is serious; if the power consumption of the auxiliary pump is calculated, although the torque does not exceed the allowable value during the composite action, the auxiliary pump power is subtracted from the main pump power when the main pump performs the single action, and the auxiliary pump is in a non-working or light-load working state at the moment, so that the power utilization of the engine is insufficient, the action speed is slow, and the efficiency is obviously reduced.
Disclosure of Invention
The invention aims to provide a power control method of a rotary drilling rig and the rotary drilling rig, which can fully utilize the power of an engine, ensure that the input torque of a main pump does not exceed an allowable value and prevent the rotating speed of the engine from suddenly dropping.
In order to achieve the purpose, the invention adopts the following technical scheme:
a power control method of a rotary drilling rig comprises the following steps:
setting torque reserve values of the engine in a low gear, a middle gear and a high gear, and drawing a rotating speed/torque fitting curve of a main pump according to the set torque reserve values and a rotating speed/torque characteristic curve of the engine;
determining delay response time and rising slope of main pump power control current according to a torque response characteristic curve of an engine, enabling output torque of the engine to be matched with torque required by a main pump, and drawing a slope curve of the main pump power control current according to the determined delay response time and the rising slope;
dividing the pressure range of the auxiliary pump into a plurality of pressure intervals, and setting the deduction power of the auxiliary pump corresponding to each pressure interval under each gear of the engine;
acquiring the working gear of the engine and the pressure of an auxiliary pump, acquiring the rotating speed of the engine according to the working gear of the engine, determining the power of a main pump at the rotating speed according to the rotating speed of the engine and the rotating speed/torque fitting curve, and simultaneously selecting the corresponding auxiliary pump to deduct power according to the gear of the engine and the pressure of the auxiliary pump;
subtracting the deduction power of the auxiliary pump from the power of the main pump at the corresponding rotating speed to obtain the actual output power of the main pump, and obtaining the power control current value of the main pump according to the actual output power of the main pump and the power/current curve of the main pump;
and transmitting the main pump power control current value to an electromagnetic valve for controlling the main pump power, and enabling the current of the electromagnetic valve to rise to the main pump power control current value according to a slope curve of the main pump power control current.
The method is characterized in that the low gear is defined when the gear of the engine is less than or equal to five gears, the middle gear is defined when the gear of the engine is greater than five gears and less than ten gears, and the high gear is defined when the gear of the engine is greater than or equal to ten gears.
As a preferred technical scheme of the power control method of the rotary drilling rig, when the engine is in the low gear, the torque reserve value is 25% of the output power of the engine; when the engine is in the intermediate gear, the torque reserve value is 10% -15% of the output power of the engine; when the engine is in the high gear, the torque reserve value is 5% -10% of the output power of the engine.
As a preferred technical scheme of the power control method of the rotary drilling rig, when torque reserve values of an engine in a low gear, a middle gear and a high gear are set, the set torque reserve values are finely adjusted according to a pressure flow curve of a main pump.
As a preferred technical scheme of the power control method of the rotary drilling rig, determining the delay response time and the rising slope of the main pump power control current according to the torque response characteristic curve of the engine specifically comprises the following steps:
defining the rising time of the main pump power control current as T, and then T is Td + (It-Ic)/Ra, wherein Td is the delay time, Ic is the current value, It is the target current value, and Ra is the current rising rate; td and Ra are continuously adjusted according to the torque response characteristic curve of the engine so that the output torque of the engine is matched with the torque required by the main pump.
As a preferred technical scheme of the power control method of the rotary drilling rig, the pressure range of the auxiliary pump is divided into four to six pressure intervals.
As a preferred technical scheme of the power control method of the rotary drilling rig, obtaining the rotating speed of the engine according to the working gear of the engine specifically comprises the following steps: and acquiring the working gear of the engine, and taking the preset rotating speed of the engine corresponding to the current gear as the rotating speed of the engine.
As an optimal technical scheme of the power control method of the rotary drilling rig, selecting corresponding auxiliary pump deduction power according to the gear of an engine and the pressure of an auxiliary pump specifically comprises the following steps: and judging a pressure interval under a corresponding gear to which the acquired auxiliary pump pressure belongs, and taking the power corresponding to the maximum pressure value in the pressure interval as the auxiliary pump deduction power under the pressure.
A rotary drilling rig adopts the power control method of the rotary drilling rig.
The invention has the beneficial effects that:
the invention provides a power control method of a rotary drilling rig, which can ensure that the power of an engine does not exceed an allowable value and the rotating speed of the engine does not drop suddenly by setting torque reserve values of the engine at a low gear, a middle gear and a high gear and drawing a rotating speed/torque fitting curve of the engine according to the torque reserve values; by setting the delay response time and the rising slope of the main pump power control current and drawing the slope curve of the main pump power control current according to the delay response time and the rising slope, the torque output of the main pump can be ensured to slightly lag behind the torque output of the engine by proper time, so that the engine is prevented from falling down seriously or stalling, and the quick action response can be ensured when the machine works; the working gear and the auxiliary pump pressure of the engine are obtained when the machine works, and the auxiliary pump is determined to deduct power according to the working gear and the auxiliary pump pressure, so that the power of the engine can be fully utilized no matter the machine performs single action or compound action, the input torque of a main pump can be ensured not to exceed an allowable value, and the rotating speed of the engine cannot suddenly drop.
Drawings
Fig. 1 is a schematic flow chart of a power control method of a rotary drilling rig according to an embodiment of the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1, an embodiment of the present invention provides a power control method for a rotary drilling rig, including the following steps:
and S1, torque reserve values of the engine in a low gear, a middle gear and a high gear are set, and a rotating speed/torque fitting curve of the engine is drawn according to the set torque reserve values and the rotating speed/torque characteristic curve of the engine.
Specifically, the low range is defined when the engine has a gear equal to or less than five gears, the intermediate range is defined when the engine has a gear greater than five gears and less than ten gears, and the high range is defined when the engine has a gear equal to or greater than ten gears.
More specifically, the low gear is mainly applied to a walking working condition, the required torque does not need to be too large, and meanwhile, the torque reserve value is 25% of the output power of the engine when the engine is set to be in the low gear in consideration of oil consumption; the middle gear is a common operation gear, and when the engine is set to be in the middle gear, the torque reserve value is 10% -15% of the output power of the engine; the high gear is suitable for severe working conditions, large torque needs to be output, and when the high gear of the engine is set, the torque reserve value is 5% -10% of the output power of the engine.
Preferably, when setting the torque reserve values of the engine in the low gear, the intermediate gear and the high gear, the set torque reserve values are finely adjusted according to the pressure-flow curve of the main pump so that the power output of the engine matches the power output of the main pump.
S2, determining the delay response time and the rising slope of the main pump power control current according to the torque response characteristic curve of the engine, matching the output torque of the engine with the torque required by the main pump, and drawing a slope curve of the main pump power control current according to the determined delay response time and the rising slope.
Specifically, defining the rising time of the main pump power control current as T, and then T ═ Td + (It-Ic)/Ra, where Td is the delay time, Ic is the current value, It is the target current value, and Ra is the current rising rate; td and Ra are continuously adjusted according to the torque response characteristic curve of the engine so that the output torque of the engine is matched with the torque required by the main pump. In adjusting parameters Td and Ra, it is ensured that the torque of the main pump does not precede the torque output of the engine, which would otherwise result in severe engine stall or stall, and that the torque of the main pump does not excessively lag behind the torque output of the engine, which would otherwise result in sluggish machine operation.
And S3, dividing the pressure range of the auxiliary pump into a plurality of pressure intervals, and setting the auxiliary pump deduction power corresponding to each pressure interval under each gear of the engine.
Specifically, for the rotary drilling rig, the auxiliary pump pressure is in a certain range, and the auxiliary pump pressure range is usually divided into four to six pressure intervals, preferably five pressure intervals, for example, the auxiliary pump cut-off pressure is 32Mpa, and the auxiliary pump pressure can be divided into five regions, namely 0-8Mpa, 8-13Mpa, 13-20Mpa, 20-25Mpa and 25-32 Mpa. And under each gear of the engine, the pressure of the auxiliary pump and the power absorbed by the auxiliary pump have a corresponding relation. When the pressure of the auxiliary pump is lower than 8Mpa, the absorbed power of the auxiliary pump is considered to be small and can be basically ignored, so that the deducted power of the auxiliary pump can be zero at the moment. For other intervals of the auxiliary pump pressure, the auxiliary pump deduction power corresponding to each gear can be set, for example, when the engine works in the first gear state and the auxiliary pump pressure is 8-13Mpa, the power absorbed by the auxiliary pump when the auxiliary pump pressure is 13Mpa can be set as the auxiliary pump deduction power when the auxiliary pump pressure is 8-13Mpa and the engine works in the first gear state. By analogy, the auxiliary pump deduction power of the engine working under each gear and the auxiliary pump pressure in different intervals can be set. The auxiliary pump minus power is the consumption that the auxiliary pump can absorb in the corresponding engine gear, auxiliary pump pressure interval, which may be the maximum value of the power that can be absorbed in the auxiliary pump pressure interval.
And S4, acquiring the working gear of the engine and the pressure of the auxiliary pump, acquiring the rotating speed of the engine according to the working gear of the engine, determining the power of the main pump at the rotating speed according to the rotating speed of the engine and a rotating speed/torque fitting curve of the main pump, and acquiring the corresponding subtracted power of the auxiliary pump according to the working gear of the engine and the pressure of the auxiliary pump.
Specifically, in the rotary drilling rig, a gear knob for adjusting the gear of an engine is arranged, the working gear of the engine can be adjusted through the gear knob, and each working gear is provided with a preset rotating speed. And when the working gear of the engine is obtained, the power of the main pump is determined by taking the preset rotating speed of the engine corresponding to the current gear as the rotating speed of the engine.
Specifically, after the operating gear of the engine and the pressure of the auxiliary pump are obtained, a pressure interval under a corresponding gear to which the obtained pressure of the auxiliary pump belongs is judged, and the power corresponding to the maximum pressure value in the pressure interval is used as the deduction power of the auxiliary pump under the pressure.
And S5, subtracting the subtracted power of the auxiliary pump from the power of the main pump at the corresponding rotating speed to obtain the actual output power of the main pump, and obtaining the power control current value of the main pump from the actual output power of the main pump and the power/current curve of the main pump.
By the control method, the power of the engine can be fully utilized no matter the rotary drilling rig performs single action or compound action, the input torque of the main pump can be ensured not to exceed an allowable value, and the rotating speed of the engine cannot drop suddenly.
And S6, transmitting the main pump power control current value to an electromagnetic valve for controlling the main pump power, and enabling the current of the electromagnetic valve to rise to the main pump power control current value according to the slope curve of the main pump power control current.
Under the control of the power control current of the main pump, the sum of the absorbed power of the main pump and the subtracted power of the auxiliary pump is not larger than the power of the engine, or the sum is closer to the power of the engine, so that the rotating speed of the engine is not suddenly reduced.
The embodiment of the invention also provides a rotary drilling rig, and the power control method of the rotary drilling rig is adopted. By adopting the power control method, the problem that the engine has a large stall speed or the engine stalls can be solved, so that the stall speed condition of the engine is improved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. A power control method of a rotary drilling rig is characterized by comprising the following steps:
setting torque reserve values of the engine in a low gear, a middle gear and a high gear, and drawing a rotating speed/torque fitting curve of a main pump according to the set torque reserve values and a rotating speed/torque characteristic curve of the engine;
determining delay response time and rising slope of main pump power control current according to a torque response characteristic curve of an engine, enabling output torque of the engine to be matched with torque required by a main pump, and drawing a slope curve of the main pump power control current according to the determined delay response time and the rising slope;
dividing the pressure range of the auxiliary pump into a plurality of pressure intervals, and setting the deduction power of the auxiliary pump corresponding to each pressure interval under each gear of the engine;
acquiring the working gear of the engine and the pressure of an auxiliary pump, acquiring the rotating speed of the engine according to the working gear of the engine, determining the power of a main pump at the rotating speed according to the rotating speed of the engine and the rotating speed/torque fitting curve, and simultaneously selecting the corresponding auxiliary pump to deduct power according to the gear of the engine and the pressure of the auxiliary pump;
subtracting the deduction power of the auxiliary pump from the power of the main pump at the corresponding rotating speed to obtain the actual output power of the main pump, and obtaining the power control current value of the main pump according to the actual output power of the main pump and the power/current curve of the main pump;
and transmitting the main pump power control current value to an electromagnetic valve for controlling the main pump power, and enabling the current of the electromagnetic valve to rise to the main pump power control current value according to a slope curve of the main pump power control current.
2. The power control method of the rotary drilling rig according to claim 1, wherein the low gear is defined when the gear of the engine is equal to or less than five gears, the intermediate gear is defined when the gear of the engine is greater than five gears and less than ten gears, and the high gear is defined when the gear of the engine is equal to or greater than ten gears.
3. The power control method of the rotary drilling rig according to claim 1, wherein when an engine is in the low gear, the torque reserve value is 25% of the output power of the engine; when the engine is in the intermediate gear, the torque reserve value is 10% -15% of the output power of the engine; when the engine is in the high gear, the torque reserve value is 5% -10% of the output power of the engine.
4. The power control method of the rotary drilling rig according to claim 1, wherein when the torque reserve values of the engine in the low gear, the middle gear and the high gear are set, the set torque reserve values are finely adjusted according to a pressure flow curve of the main pump.
5. The power control method of the rotary drilling rig according to claim 1, wherein the step of determining the delay response time and the rising slope of the main pump power control current according to the torque response characteristic curve of the engine specifically comprises the following steps:
defining the rising time of the main pump power control current as T, and then T is Td + (It-Ic)/Ra, wherein Td is the delay time, Ic is the current value, It is the target current value, and Ra is the current rising rate; td and Ra are continuously adjusted according to the torque response characteristic curve of the engine so that the output torque of the engine is matched with the torque required by the main pump.
6. The power control method of the rotary drilling rig according to claim 1, wherein the auxiliary pump pressure range is divided into four to six pressure intervals.
7. The power control method of the rotary drilling rig according to claim 1, wherein the obtaining of the rotation speed of the engine according to the working gear of the engine specifically comprises: and acquiring the working gear of the engine, and taking the preset rotating speed of the engine corresponding to the current gear as the rotating speed of the engine.
8. The power control method of the rotary drilling rig according to claim 1, wherein the step of selecting the corresponding auxiliary pump deduction power according to the gear of the engine and the auxiliary pump pressure specifically comprises the following steps: and judging a pressure interval under a corresponding gear to which the acquired auxiliary pump pressure belongs, and taking the power corresponding to the maximum pressure value in the pressure interval as the auxiliary pump deduction power under the pressure.
9. A rotary drilling rig, characterized in that the power control method of the rotary drilling rig according to any one of claims 1-8 is adopted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111400362.6A CN114109348A (en) | 2021-11-24 | 2021-11-24 | Power control method of rotary drilling rig and rotary drilling rig |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111400362.6A CN114109348A (en) | 2021-11-24 | 2021-11-24 | Power control method of rotary drilling rig and rotary drilling rig |
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| US4246973A (en) * | 1978-01-23 | 1981-01-27 | Cooper Industries, Inc. | Controls for hydraulic percussion drill |
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| JP2009002318A (en) * | 2007-06-25 | 2009-01-08 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Pump-control circuit of construction machine |
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| US20190162211A1 (en) * | 2016-04-08 | 2019-05-30 | Junttan Oy | A method and a system for controlling the driving engine and hydraulic pumps of a hydraulic machine, as well as a pile driving rig |
| CN111306027A (en) * | 2020-02-17 | 2020-06-19 | 柳州柳工挖掘机有限公司 | Method and system for controlling power of main pump of rotary drilling rig |
| JP2020192827A (en) * | 2019-05-24 | 2020-12-03 | トヨタ自動車株式会社 | vehicle |
-
2021
- 2021-11-24 CN CN202111400362.6A patent/CN114109348A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4246973A (en) * | 1978-01-23 | 1981-01-27 | Cooper Industries, Inc. | Controls for hydraulic percussion drill |
| CN101050729A (en) * | 2007-04-23 | 2007-10-10 | 桂林吉星电子等平衡动力有限公司 | Energy distribution type servo system matched with fuel engine and its regulating method |
| JP2009002318A (en) * | 2007-06-25 | 2009-01-08 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Pump-control circuit of construction machine |
| CN101086232A (en) * | 2007-07-09 | 2007-12-12 | 三一重工股份有限公司 | Concrete transfer pump energy-saving control method |
| CN106542450A (en) * | 2016-03-02 | 2017-03-29 | 徐工集团工程机械有限公司 | Rotary drilling rig and its anti-lost speed control method, device and system |
| US20190162211A1 (en) * | 2016-04-08 | 2019-05-30 | Junttan Oy | A method and a system for controlling the driving engine and hydraulic pumps of a hydraulic machine, as well as a pile driving rig |
| JP2020192827A (en) * | 2019-05-24 | 2020-12-03 | トヨタ自動車株式会社 | vehicle |
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