CN114109961B - Calibration method for motor variable starting point of power head of rotary drilling rig - Google Patents
Calibration method for motor variable starting point of power head of rotary drilling rig Download PDFInfo
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- CN114109961B CN114109961B CN202111339719.4A CN202111339719A CN114109961B CN 114109961 B CN114109961 B CN 114109961B CN 202111339719 A CN202111339719 A CN 202111339719A CN 114109961 B CN114109961 B CN 114109961B
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- variable
- power head
- starting point
- pressure
- variable starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
Abstract
The invention provides a calibration method for a variable starting point of a motor of a power head of a rotary drilling rig, which comprises the steps of using a calibration device, wherein the calibration device comprises a variable pressure meter, a working pressure meter, an overflow valve and an oil pipe, the oil pipe comprises a main pipe and two branch pipes, the main pipe is connected with the branch pipes at a converging point, the working pressure meter and the overflow valve are arranged on the main pipe in series, and the variable pressure meter is connected with a large cavity of a variable cylinder; the calibrating method comprises three steps of connection, oil inlet and variable calibration, wherein in the connection step, a A, B port of a power head motor is simultaneously connected to a forward rotating channel or a reverse rotating channel of a power head driving system; in the variable calibration, when the difference between the pressure value Pn measured by the working manometer and the pressure value Px measured by the variable manometer is equal to the variable starting point set value Po, the calibration of the variable starting point is completed. The method does not need to disassemble and assemble the power head and reach the standard of the fixed variable starting point, avoids system pollution caused by disassembly and assembly, and saves a great amount of economic cost and time cost.
Description
Technical Field
The invention relates to the field of engineering machinery, in particular to a method for calibrating a variable starting point of a motor of a power head of a rotary drilling rig.
Background
At present, all motors of power heads of rotary drilling rigs adopt variable motors, and mainly comprise a hydraulic control variable motor, an electric control variable motor and an automatic variable motor. Wherein the automatic variable motor is an automatic variable according to the load pressure, when the load reaches the variable start pressure value, the variable push rod is pushed from the Vgmin end to the Vgmax end of the variable cylinder 13 as shown in fig. 1 from the small displacement to the large displacement in a pressure range. If the variable starting point of the power head motor is too low, the power head motor is changed to be large in displacement when the load pressure is low, which is not beneficial to the light load working condition construction with high construction rotating speed; if the variable starting point of the power head motor is too high, the load pressure reaches the maximum value set by the system, but the power head motor is not completely variable, and the power head cannot output the maximum torque, so that the construction efficiency of heavy load working conditions is reduced.
The rotary drilling rig generally marks the variable starting point of the power head motor when leaving the factory, but the phenomenon that a motor variable mechanism is blocked or a spring becomes soft after working for a period of time occurs during construction, so that the variable starting point is changed and the recalibration is needed. In the prior art, a power head motor to be calibrated is detached and sent to a special test bench for calibration, so that the time and the labor are consumed, the construction is delayed, and the system pollution is easily caused by long-time exposure of a hydraulic oil port on a construction site.
Accordingly, there is a need in the art for an apparatus and method for calibrating the starting point of a rotary drilling rig power head motor variable at a job site without the need for disassembly and assembly of the motor.
Disclosure of Invention
The invention firstly provides a calibrating device for the variable starting point of a power head motor of a rotary drilling rig, wherein the power head motor comprises a A, B oil port of the power head motor and comprises a servo variable mechanism, the servo variable mechanism comprises a servo valve, a variable starting point adjusting spring and a variable cylinder 13, the variable cylinder 13 comprises a large cavity 131 and a small cavity 132, the calibrating device comprises a variable pressure gauge 2, a working pressure gauge 3, an overflow valve 4 and an oil pipe 5, the A, B oil port of the power head motor is used for being connected to a forward rotation channel or a reverse rotation channel of a power head driving system through the oil pipe, the oil pipe comprises a main pipe 51 used for being communicated with the forward rotation channel or the reverse rotation channel of the power head driving system and two branch pipes 52 used for being respectively connected with the A, B oil port of the power head motor, the main pipe and the branch pipes are connected at an assembly point 53, the working pressure gauge 3 and the overflow valve 4 are arranged on the main pipe 51 in series, and the variable pressure gauge 2 is connected with the large cavity 131 of the variable cylinder 13.
The invention also provides a calibration method of the variable starting point of the power head motor of the rotary drilling rig, wherein the power head motor 1 comprises an oil port of the power head motor A, B and comprises a servo variable mechanism, the servo variable mechanism comprises a servo valve 11, a variable starting point adjusting spring 12 and a variable cylinder 13, the variable cylinder 13 comprises a large cavity 131 and a small cavity 132, the calibration method comprises the steps of using a calibration device, the calibration device comprises a variable pressure meter 2, a working pressure meter 3, an overflow valve 4 and an oil pipe 5, the oil pipe comprises a main pipe 51 and two branch pipes 52, the main pipe and the branch pipes are connected at a collecting point 53, the working pressure meter 3 and the overflow valve 4 are arranged on the main pipe 51 in series, and the variable pressure meter 2 is connected with the large cavity 131 of the variable cylinder 13;
the calibration method comprises the following steps of,
step one, connection: connecting a main pipe of the calibration device to a forward rotation channel or a reverse rotation channel of a power head driving system, and connecting two branch pipes to an oil port A, B of a power head motor respectively, so that a A, B port of the power head motor is simultaneously connected to the forward rotation channel or the reverse rotation channel of the power head driving system;
step two, oil feeding: when the variable starting point is calibrated, setting the variable starting point value to be calibrated as Po, if A, B ports of a power head motor are connected to a forward rotating channel of a power head driving system, operating a rotary drilling rig system to enable the forward rotating channel to feed oil, and adjusting an overflow valve 4 to enable the pressure value of a working pressure measuring meter 3 to be Pn, wherein Pn is more than Po; at this time, the variable starting point adjusting spring 12 is reset so that no pressure is displayed at the variable pressure measuring table 2; similarly, if the A, B ports of the power head motor are connected to the reversing channel of the power head driving system, the rotary drilling rig system is operated to feed oil to the reversing channel;
step three, variable calibration: the variable starting point adjusting spring 12 is adjusted to gradually change the direction of the servo valve 11, so that the variable pressure measuring table 2 connected with the large cavity 131 of the variable cylinder starts to display the pressure which is the pressure value Px after the pressure is reduced by the servo valve 11, and when the difference between the pressure value Pn measured by the working pressure measuring table 3 and the pressure value Px measured by the variable pressure measuring table 2 is equal to Po, the calibration of the variable starting point is completed.
In a specific embodiment, the measuring range of the variable pressure meter 2 is smaller than or equal to the measuring range of the working pressure meter 3.
In a specific embodiment, the relief valve 4 is disposed on the manifold 51 near one end of the forward or reverse rotation passage of the power head drive system, and the operating pressure gauge 3 is disposed on the manifold 51 near one end of the power head motor 1.
In the present invention, the positions of the working pressure gauge 3 and the relief valve 4 are interchangeable, but it is considered that the relief valve itself is used as the relief valve in the forward or reverse rotation passage of the power head driving system, so that the relief valve is generally disposed at an end near the forward or reverse rotation passage of the power head driving system, and the working pressure gauge is disposed at an end near the power head motor. When a new machine which is not delivered from the factory is used for calibrating the variable starting point of the motor of the power head, a special overflow valve 4 can be connected for calibrating; when the machine in the construction site is used for calibrating the variable starting point of the power head motor, a safety valve on a forward rotation channel or a reverse rotation channel of a power head driving system is generally used as the overflow valve.
In a specific embodiment, the relief valve 4 is a self-contained relief valve on a forward or reverse rotation passage of the power head driving system.
The invention has at least the following beneficial effects:
1) The motor A, B port of the power head is connected to the same channel (a forward rotating channel or a reverse rotating channel) at the same time, so that the system pressure holding can be realized, the motor does not output torque and rotating speed, the power head of the rotary drilling rig does not output, and the variable starting point is calibrated in the state, so that the safety is high;
2) The working pressure is regulated by utilizing the overflow valve, so that the calibration of the parameter value of the starting point of any variable can be realized;
3) The variable starting point is calibrated by utilizing the pressure difference between the working manometer and the variable manometer of the forward rotation channel or the reverse rotation channel, and the operation is simple and reliable;
4) The method does not need to disassemble and assemble the power head and reach the standard of the fixed variable starting point, avoids system pollution caused by disassembly and assembly, and saves a great amount of economic cost and time cost.
Drawings
FIG. 1 is a schematic diagram of a calibration apparatus for the variable starting point of a power head motor according to the present invention.
Detailed Description
As in the present invention, the prior art power head motor 1 is also integrated with a servo variable mechanism which also includes a servo valve 11, a variable start point adjustment spring 12, and a variable cylinder 13 shown in fig. 1.
The servo variable mechanism realizes the variable by operating a hydraulic servo valve to act and pushing a variable cylinder piston by using pressure oil output by a pump.
In the invention, the servo valve 11 performs inching reversing under the action of system pressure, variable cylinder piston feedback thrust and variable starting point adjusting spring force, the communication opening of the variable cylinder large cavity 131 and the oil tank 14 is controlled to realize decompression, and if the smaller the communication opening of the variable cylinder large cavity 131 and the oil tank 14 is, the larger the pressure of the variable cylinder large cavity 131 is, the larger the displacement of the power head motor is; conversely, if the larger the opening of the variable cylinder large chamber 131 in communication with the oil tank 14 is, the smaller the pressure of the variable cylinder large chamber 131 is, the smaller the displacement of the head motor is.
In fig. 1 of the present invention, the working oil port of the power head motor A, B is simultaneously connected to the forward rotation channel or the reverse rotation channel of the power head driving system; the pressure gauge, namely the working pressure gauge 3, is arranged on the forward rotation channel or the reverse rotation channel, the pressure gauge, namely the variable pressure gauge 2, is arranged at the pressure measuring port of the variable cylinder 13 of the power head motor, and the variable starting point of the power head motor is calibrated by using the pressure difference of the two pressure gauges to be equal to the variable starting point.
The invention provides a method for calibrating a variable starting point of a power head motor of a rotary drilling rig, which comprises a power head motor 1, a variable pressure meter 2, a working pressure meter 3 and an overflow valve 4, wherein the power head motor 1 is also integrated with a servo variable mechanism, and the servo variable mechanism comprises a servo valve 11, a variable starting point adjusting spring 12 and a variable cylinder 13. The A, B port of the power head motor 1 is simultaneously connected to a forward rotation channel or a reverse rotation channel of a power head driving system, the overflow valve 4 is arranged on the channel connected with the power head motor 1, the working pressure measuring meter 3 is arranged on the connected channel, and the variable pressure measuring meter 2 is arranged at the variable cylinder pressure measuring port of the power head motor.
In the present invention, the relief valve 4 is disposed on the channel to which the power head motor 1 is connected, and safety valves are disposed on both the forward rotation channel and the reverse rotation channel of the power head motor driving system, which can be used as the relief valve 4 in the present invention.
When the variable starting point is calibrated, setting the variable starting point value to be calibrated as Po, for example, connecting the A, B port of the power head motor 1 to a forward rotating channel of a power head driving system, operating a drilling machine system to enable the forward rotating channel to enter oil, and adjusting the overflow valve 4 to enable the pressure value of the working pressure measuring meter 3 to be Pn, wherein Pn is more than Po; at this point no pressure is shown at variable load table 2. Specifically, since the A, B chamber of the power head motor 1 is the same passage connected in the forward rotation passage and the reverse rotation passage, the A, B chamber is acted on simultaneously, and thus the power head motor does not rotate regardless of the invariable displacement of the power head motor. When the servo valve 11 is in the lower position (the variable starting point adjusting spring 12 is automatically reset, so that the servo valve 11 is automatically in the lower position), the large cavity 131 of the variable cylinder 13 is in oil drainage communication with the shell of the power head motor through the servo valve 11, the oil tank 14 is directly connected, and the variable pressure measuring meter 2 connected with the large cavity 131 of the variable cylinder 13 is not in pressure display.
The variable starting point adjusting spring 12 is adjusted, so that the servo valve 11 in fig. 1 is reversed upwards, the servo valve 11 is jogged under the action of the cavity pressure of the power head motor A, B and the spring force of the variable starting point adjusting spring 12, at the moment, the servo valve 11 is equivalent to a proportional pressure reducing valve, the cavity pressure of the power head motor A, B is reduced and then acts on the large cavity 131 of the variable cylinder 13, and a variable push rod in the variable cylinder 13 is pushed to drive the variable of the power head motor, so that the displacement is changed; the pressure value Px after the pressure reduction by the servo valve 11 is read through the variable pressure measuring table 2 connected with the large cavity 131 of the variable cylinder 13, and when the variable starting point adjusting spring 12 is adjusted to make the difference between the pressure value Pn measured by the working pressure measuring table 3 and the pressure value Px measured by the variable pressure measuring table 2 equal to Po, the variable starting point is calibrated.
The foregoing examples are provided for the purpose of clearly illustrating the technical aspects of the present invention and are not to be construed as limiting the embodiments of the present invention. Any other equivalent technical characteristics may be changed or modified without changing the basic idea and essence of the present invention, and the present invention shall fall within the scope of the claims.
Claims (4)
1. The method for calibrating the variable starting point of the power head motor of the rotary drilling rig is characterized by comprising a calibration device, wherein the calibration device comprises a variable pressure meter (2), a working pressure meter (3), an overflow valve (4) and an oil pipe (5), the oil pipe comprises a main pipe (51) and two branch pipes (52), the main pipe and the branch pipes are connected at a collecting point (53), the working pressure meter (3) and the overflow valve (4) are arranged on the main pipe (51) in series, and the variable pressure meter (2) is connected with the large cavity (131) of the variable pressure cylinder (13);
the calibration method comprises the following steps of,
step one, connection: connecting a main pipe of the calibration device to a forward rotation channel or a reverse rotation channel of a power head driving system, and connecting two branch pipes to an oil port A and an oil port B of a power head motor respectively, so that the oil port A and the oil port B of the power head motor are simultaneously connected to the forward rotation channel or the reverse rotation channel of the power head driving system;
step two, oil feeding: when the variable starting point is calibrated, setting the variable starting point value to be calibrated as Po, if the oil port A and the oil port B of the power head motor are connected to a forward rotating channel of a power head driving system, operating a rotary drilling rig system to enable the forward rotating channel to enter oil, and adjusting an overflow valve (4) to enable the pressure value of a working pressure measuring meter (3) to be Pn, wherein Pn is more than Po; at the moment, the variable starting point adjusting spring (12) is reset, so that the variable pressure meter (2) has no pressure display; similarly, if the oil port A and the oil port B of the power head motor are connected to the reversing channel of the power head driving system, the rotary drilling rig system is operated to enable the reversing channel to feed oil;
step three, variable calibration: and adjusting a variable starting point adjusting spring (12) to gradually change the servo valve (11), so that a variable pressure measuring meter (2) connected with a large cavity (131) of a variable cylinder (13) starts to display pressure, wherein the pressure is a pressure value Px after the pressure is reduced by the servo valve (11), and when the difference between a pressure value Pn measured by a working pressure measuring meter (3) and a pressure value Px measured by the variable pressure measuring meter (2) is equal to Po, the calibration of the variable starting point is completed.
2. The method for calibrating the variable starting point of the motor of the power head of the rotary drilling rig according to claim 1, wherein the measuring range of the variable pressure meter (2) is smaller than or equal to the measuring range of the working pressure meter (3).
3. The method for calibrating the variable starting point of the power head motor of the rotary drilling rig according to claim 1, wherein the overflow valve (4) is arranged at one end of the main pipe (51) close to a forward rotation channel or a reverse rotation channel of a power head driving system, and the working pressure measuring meter (3) is arranged at one end of the main pipe (51) close to the power head motor (1).
4. The method for calibrating the variable starting point of the power head motor of the rotary drilling rig according to any one of claims 1-3, wherein the overflow valve (4) is a safety valve self-contained on a forward rotation channel or a reverse rotation channel of a power head driving system.
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| CN202111339719.4A CN114109961B (en) | 2021-11-12 | 2021-11-12 | Calibration method for motor variable starting point of power head of rotary drilling rig |
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| CN202111339719.4A CN114109961B (en) | 2021-11-12 | 2021-11-12 | Calibration method for motor variable starting point of power head of rotary drilling rig |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1528593A1 (en) * | 1964-07-15 | 1969-06-26 | Technometra Narodni Podnik | Control device for hydrostatic pumps or motors |
| US7562554B2 (en) * | 2006-08-31 | 2009-07-21 | Caterpillar Inc. | Method for calibrating independent metering valves |
| CN102359880B (en) * | 2011-06-29 | 2013-07-17 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Detecting method of performances of four quadrant working of hydraulic pump motor |
| CN102706553B (en) * | 2012-06-29 | 2014-12-10 | 三一重工股份有限公司 | Measurement method and device and rotary drilling dig |
| CN205422678U (en) * | 2016-03-15 | 2016-08-03 | 玉柴桩工(常州)有限公司 | Dig rig drilling rod monitor control device soon |
| CN108953295B (en) * | 2018-06-27 | 2020-04-24 | 潍柴动力股份有限公司 | Pipe burst detection system and detection method for hydraulic motor endurance test |
| CN109707365B (en) * | 2018-12-27 | 2022-04-01 | 北京三一智造科技有限公司 | Method and device for displaying hole-forming animation of rotary drilling rig and rotary drilling rig |
| CN112324745B (en) * | 2019-09-24 | 2022-06-10 | 杨丽璇 | Portable hydraulic system leakage signal acquisition device and acquisition method thereof |
| CN112504545A (en) * | 2020-11-26 | 2021-03-16 | 东风柳州汽车有限公司 | Oil pump pressure detection device and method |
| CN113107352B (en) * | 2021-05-18 | 2023-05-05 | 恒天九五重工有限公司 | Rock entering control device and method for rotary drilling rig |
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