CN113417613A - Waveform-customizable hydraulic pulse generation experimental device and experimental method thereof - Google Patents
Waveform-customizable hydraulic pulse generation experimental device and experimental method thereof Download PDFInfo
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- 238000004146 energy storage Methods 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims description 41
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- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
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Abstract
The invention relates to a hydraulic pulse generation experimental device with a customizable waveform and an experimental method thereof, belonging to the technical field of experimental devices. The device comprises an energy storage device, a pulse generation device, a power device and a discharge capacity metering device, wherein the power device is arranged at the top end of the pulse generation device, the energy storage device and the discharge capacity metering device are respectively arranged on two sides of the pulse generation device, and the discharge capacity metering device is used for detecting and displaying an experimental result. The invention can provide various hydraulic pulse waveforms according to the requirements of different experimental conditions, and better guides the application of the pulsating water drive technology in actual production by researching the influence of various hydraulic pulse waveforms on the experiment.
Description
Technical Field
The invention relates to a hydraulic pulse generation experimental device with a customizable waveform and an experimental method thereof, belonging to the technical field of experimental devices.
Background
Petroleum is taken as industrial blood and plays a very important role in the economic development of China, in recent years, the water flooding development technology is a main means for developing most oil fields in China, and single conventional water flooding and chemical repelling gradually reveal the defects along with the application of the conventional water flooding and chemical flooding in the oil field development, such as continuous rising of water content of an oil well, serious reservoir pollution, reduction of oil well yield, continuous improvement of crude oil recovery efficiency, multiple tests of technology, cost, environmental protection and the like, the solution of the problems is urgent, therefore, innovative water drive technology is needed, the pulsating water drive technology becomes the technical focus of the current research, the research core of the technology lies in a hydraulic pulse generation experimental device, the conventional hydraulic pulse generation experimental device can only generate one waveform, in order to improve the recovery efficiency under different reservoir environments, it is necessary to research the influence of different waveforms of hydraulic pulses on the reservoir.
Chinese patent document CN111101863A discloses a hydraulic pulse generation experimental device and a working method thereof, which belong to the technical field of experimental devices, the device comprises a crank expansion device, a piston pump device, a buffer device and a pressure sensor device, the crank expansion device drives the piston pump device to reciprocate, pulse flowing liquid is formed in the buffer device, and the pressure sensor device collects the liquid pressure in the buffer device. However, the experimental device cannot realize the transformation of the hydraulic pulse waveform.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the hydraulic pulse generation experimental device with the waveform capable of being customized, various hydraulic pulse waveforms can be provided according to the requirements of different experimental conditions, and the application of the pulsating water drive technology in actual production can be better guided by researching the influence of various hydraulic pulse waveforms on the experiment.
The invention also provides an experimental method of the hydraulic pulse generation experimental device with the customizable waveform.
The technical scheme of the invention is as follows:
a hydraulic pulse generation experimental device capable of customizing waveforms comprises an energy storage device, a pulse generation device, a power device and a displacement metering device, wherein,
the top end of the pulse generating device is provided with a power device, the two sides of the pulse generating device are respectively provided with an energy storage device and a discharge capacity metering device, and the discharge capacity metering device is used for detecting and displaying an experimental result.
Preferably, the energy storage device comprises a liquid storage tank, a liquid injection pump and a high-pressure energy storage device, the liquid storage tank is connected with the high-pressure energy storage device through the liquid injection pump, a pressure gauge is arranged on the high-pressure energy storage device, and the high-pressure energy storage device is connected with the pulse generation device.
Preferably, a first check valve is arranged on a connecting pipeline between the liquid injection pump and the high-pressure energy accumulator, and a second check valve is arranged on a connecting pipeline between the high-pressure energy accumulator and the pulse generating device.
Preferably, the pulse generating device comprises a plunger, a lower pressing plate, an upper pressing plate, a pressing plate connecting rod, a piston cylinder and a pulse generating clamping box, the piston cylinder is arranged in the pulse generating clamping box, the lower pressing plate is arranged in the piston cylinder, the pressing plate connecting rod is arranged on the lower pressing plate, the pressing plate connecting rod penetrates through the pulse generating clamping box to be connected with the upper pressing plate, a spring is sleeved on the upper pressing plate above the pulse generating clamping box, the plunger is arranged on the upper pressing plate, and a power device is arranged on the plunger.
Further preferably, the plunger is provided with a roller steel groove, so that the power device can be conveniently engaged, the compressive strength of the roller is large enough, and the deformation of the power device when the plunger is extruded can be avoided.
Preferably, the power device comprises a stepless speed change motor, a connecting rod, a rotary base wheel and a wave cam, the wave cam is arranged on the upper side of the plunger, the rotary base wheel is arranged on the wave cam, and the rotary base wheel is connected with the stepless speed change motor through the connecting rod. Through the rotation of infinitely variable speed motor drive connecting rod and rotatory base wheel, and then drive the wave form cam motion, infinitely variable speed motor power is when adding impact load or the machine reverses, can the accurate rotation, and the gear ratio is 1: 5, namely the output rotating speed can be in the range of 1: 45 to 1: 7.25, or a combination thereof.
The connecting point of the stepless speed change motor and the connecting rod is fixed, the connecting point of the connecting rod and the rotary base wheel is fixed, and the connecting rod is always kept horizontal during movement.
Preferably, the wave cam includes a sine wave cam and a trapezoidal wave cam;
the sine wave cam is an eccentric wheel, one half of the eccentric wheel is circular, the radius of the circular wheel is the same as that of the rotary base wheel, the other half of the eccentric wheel is oval, and the oval size calculation process is as follows:
wherein: b-amplitude of sine wave waveform, cm3(ii) a A-cross sectional area of piston cylinder, cm2；Lmax-maximum radius, cm; y is the distance of plunger moving downwards at different moments, cm; r-radius of wave cam, cm corresponding to different time in a quarter-to-one period.
The maximum radius of the ellipse is calculated by formula (I), the wave cam radius corresponding to different moments in the half period of the elliptical motion of the eccentric wheel is calculated by formulas (II) and (III), and the elliptical part of the eccentric wheel is symmetrically arranged, so that the radius in the half period of the elliptical motion is calculated to obtain the size of the radius of the whole ellipse.
Trapezoidal wave form cam is the eccentric wheel, and half of eccentric wheel is circular, and circular radius is the same with rotatory base wheel radius, and the eccentric wheel opposite side is circular, and 2 circular parts are connected through sharp limit, and circular radius and sharp limit length calculation mode are as follows:
mn＝Lb(Ⅵ)
in the formula: b-amplitude of trapezoidal wave waveform, cm3(ii) a A-cross sectional area of piston cylinder, cm2；L-radius, cm; m is the gradient of the trapezoidal wave; n-roller speed, r/s; l isb-cam linear edge length;
the radius of the circle is calculated by the formula (IV), and the length of the straight line side is calculated by the formulas (V) and (VI), so that the size of the trapezoidal wave-shaped cam is determined.
Further preferably, the connecting rod is connected with a rotary base wheel through a bolt, and the rotary base wheel is connected with a wave cam in an embedded mode through a clamping groove.
Preferably, the displacement metering device comprises a displacement metering sensor and a display, the displacement metering sensor is connected with the pulse generation clamping box through a pipeline, the displacement metering sensor is connected to the display, and the displacement result detected by the displacement metering sensor is displayed through the display.
Further preferably, a third one-way valve is arranged on a connecting pipeline between the displacement metering sensor and the pulse generation clamping box.
The experimental method of the hydraulic pulse generation experimental device with the customizable waveform comprises the following operation steps:
(1) firstly, checking whether a stepless speed change motor and a displacement metering sensor are normal or not, and checking the air tightness of each pipeline and structure;
(2) according to the waveform requirement, selecting a specific waveform cam, and embedding and fixing the waveform cam on the rotary base wheel through a clamping groove;
(3) starting the infinitely variable speed motor, driving the connecting rod and the rotary base wheel to rotate by the infinitely variable speed motor, and turning off the infinitely variable speed motor when the spring supporting upper pressure plate reaches the topmost end;
(4) starting a liquid injection pump, pumping liquid into the high-pressure energy storage device, and observing the reading of a pressure gauge on the high-capacity high-pressure energy storage device;
(5) when the reading of a pressure gauge on the high-pressure energy accumulator reaches a set value, starting the high-capacity high-pressure energy accumulator and the stepless speed change motor, enabling liquid to flow into a piston cylinder in the pulse generation clamping box, driving a waveform cam on a rotary base wheel to rotate through a connecting rod by the stepless speed change motor, pushing a plunger downwards, driving a pressure plate connecting rod and a lower pressure plate to press downwards through the plunger, discharging air in the piston cylinder, driving the lower pressure plate to move upwards through the connecting rod, reducing the pressure in the piston cylinder, enabling the liquid to enter the piston cylinder at the moment, keeping the pressure reading in the high-pressure energy accumulator constant, and keeping the injection pressure consistent when the liquid enters the piston cylinder until the piston cylinder is filled with the liquid;
(6) when the pressure plate connecting rod continues to move downwards to extrude the piston cylinder, the second one-way valve is closed, the third one-way valve is opened, and liquid flows into the displacement metering sensor after passing through the third one-way valve;
(7) the hydraulic pulse waveform image is collected by the displacement metering sensor and is output on the display, so that the user can observe the hydraulic pulse waveform image conveniently.
The invention has the beneficial effects that:
1. the invention can provide various hydraulic pulse waveforms according to the requirements of different experimental conditions, and better guides the application of the pulsating water drive technology in actual production by researching the influence of various hydraulic pulse waveforms on the experiment.
2. The invention can change the waveform of the waveform cam externally connected with the rotary base wheel to change the waveform of the displacement, and if the obtained waveform is not satisfied, the motor can be immediately turned off to replace the customized waveform cam, so that the operation is convenient and the experimental research is facilitated.
3. The spring is sleeved on the upper pressure plate, so that stable pressure can be generated when the plunger moves downwards, and the plunger can rise immediately due to the expansion of the spring when the plunger rises, so that the phenomenon that the hydraulic pulse amplitude is reduced or lagged due to the fact that liquid in the piston cylinder is not filled in time after being discharged is avoided.
4. The invention has the advantages of simple structure, reasonable design, convenient installation and use, safe and reliable working performance and good use effect.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a rotary base wheel according to the present invention;
FIG. 3 is a schematic view of a sine wave cam structure according to the present invention;
FIG. 4 is a schematic view of a trapezoidal wave cam structure according to the present invention;
FIG. 5 is a sine wave waveform diagram of example 1 of the present invention;
FIG. 6 is a trapezoidal waveform diagram according to embodiment 2 of the present invention;
wherein: 1. a liquid storage tank; 2. a liquid injection pump; 3. a first check valve; 4. a pressure gauge; 5. a high voltage energy storage; 6. a second one-way valve; 7. a piston cylinder; 8. a lower pressing plate; 9. a pressure plate connecting rod; 10. a spring; 11. an upper pressure plate; 12. a plunger; 13. a sine wave shaped cam; 14. rotating the base wheel; 15. a connecting rod; 16. a bolt; 17. a stepless speed change motor; 18. a third check valve; 19. a display; 20. a displacement metering sensor; 21. a trapezoidal wave cam; 22. a clamping groove.
Detailed Description
The present invention will be further described by way of examples, but not limited thereto, with reference to the accompanying drawings.
Example 1:
as shown in fig. 1-2, the present embodiment provides a hydraulic pulse generation experimental apparatus with customizable waveforms, which includes an energy storage device, a pulse generation device, a power device and a displacement metering device, wherein,
the top end of the pulse generating device is provided with a power device, the two sides of the pulse generating device are respectively provided with an energy storage device and a discharge capacity metering device, and the discharge capacity metering device is used for detecting and displaying an experimental result.
The energy storage device comprises a liquid storage tank 1, a liquid injection pump 2 and a high-pressure energy storage device 5, the liquid storage tank 1 is connected with the high-pressure energy storage device 5 through the liquid injection pump 2, a pressure gauge 4 is arranged on the high-pressure energy storage device 5, and the high-pressure energy storage device 5 is connected with a pulse generation device.
A first one-way valve 3 is arranged on a connecting pipeline of the liquid injection pump 2 and the high-pressure energy accumulator 5, and a second one-way valve 6 is arranged on a connecting pipeline of the high-pressure energy accumulator 5 and the pulse generating device.
The pulse generating device comprises a plunger 12, a lower pressing plate 8, an upper pressing plate 11, a pressing plate connecting rod 9, a piston cylinder 7 and a pulse generating clamping box, wherein the piston cylinder 7 is arranged in the pulse generating clamping box, the lower pressing plate 8 is arranged in the piston cylinder 7, the pressing plate connecting rod 9 is arranged on the lower pressing plate 8, the pressing plate connecting rod 9 penetrates through the pulse generating clamping box to be connected with the upper pressing plate 11, a spring 10 is sleeved on the upper pressing plate 11 above the pulse generating clamping box, the plunger 12 is arranged on the upper pressing plate 11, and a power device is arranged on the plunger 12.
Be provided with the gyro wheel steel bay on the plunger 12, conveniently mesh power device, gyro wheel compressive strength is enough big, can avoid power device to warp when extruding the plunger.
The power device comprises a stepless speed change motor 17, a connecting rod 15, a rotary base wheel 14 and a wave cam, wherein the wave cam is arranged on the upper side of the plunger 12, the rotary base wheel is arranged on the wave cam, and the rotary base wheel 14 is connected with the stepless speed change motor 17 through the connecting rod 15. Through the rotation of infinitely variable speed motor drive connecting rod and rotatory base wheel, and then drive the wave form cam motion, infinitely variable speed motor power is when adding impact load or the machine reverses, can the accurate rotation, and the gear ratio is 1: 5, namely the output rotating speed can be in the range of 1: 45 to 1: 7.25, or a combination thereof.
The connecting point of the stepless speed change motor and the connecting rod is fixed, the connecting point of the connecting rod and the rotary base wheel is fixed, and the connecting rod is always kept horizontal during movement.
The wave cam is a sine wave cam 13, as shown in fig. 3, the sine wave cam is an eccentric wheel, one half of the eccentric wheel is circular, the radius of the circular is the same as that of the rotary base wheel, the other half is oval, and the oval size calculation process is as follows:
wherein: b-amplitude of sine wave waveform, cm3(ii) a A-cross sectional area of piston cylinder, cm2；Lmax-maximum radius, cm; y is the distance of plunger moving downwards at different moments, cm; r-wave cam radius corresponding to different time in quarter to one period (one quarter period is elliptical motion of eccentric wheel one)Half period), cm.
The maximum radius of the ellipse is calculated by formula (I), the wave cam radius corresponding to different moments in the half period of the elliptical motion of the eccentric wheel is calculated by formulas (II) and (III), and the elliptical part of the eccentric wheel is symmetrically arranged, so that the radius in the half period of the elliptical motion is calculated to obtain the size of the radius of the whole ellipse.
The sine wave waveform is shown in FIG. 5, the abscissa is time, the ordinate is displacement, the frequency is 1/40Hz, and the amplitude is 200cm3The wave cam rotates for 40s in one period, and the cross section area of the piston cylinder is 10cm2When the circular part of the wave cam rotates, the plunger keeps high and does not move downwards, no pressure is applied to the plunger barrel, and therefore the displacement of one half cycle is 0.
The maximum radius of the ellipse can be determined by substituting the data in the formulae (I), (II) and (III) to 20 cm. Because the required waveform is sine waveform, the radius of the waveform cam corresponding to different moments in a quarter cycle can be obtained according to the formula, and the sine waveform cam required by the experiment can be designed by combining the maximum radius.
The connecting rod 15 is connected with a rotary base wheel 14 through a bolt 16, and the rotary base wheel 14 is connected with a wave cam in an embedded mode through a clamping groove 22.
The displacement metering device comprises a displacement metering sensor 20 and a display 19, wherein the displacement metering sensor 20 is connected with a pulse generation clamping box through a pipeline, the displacement metering sensor 20 is connected to the display 19, and the displacement result detected by the displacement metering sensor is displayed through the display.
A third one-way valve 18 is arranged on a connecting pipeline of the displacement metering sensor and the pulse generation clamping box.
The experimental method of the hydraulic pulse generation experimental device with the customizable waveform comprises the following operation steps:
(1) firstly, checking whether a stepless speed change motor and a displacement metering sensor are normal or not, and checking the air tightness of each pipeline and structure;
(2) according to the waveform requirement, selecting a specific waveform cam, and embedding and fixing the waveform cam on the rotary base wheel through a clamping groove;
(3) starting the infinitely variable speed motor, driving the connecting rod and the rotary base wheel to rotate by the infinitely variable speed motor, and turning off the infinitely variable speed motor when the spring supporting upper pressure plate reaches the topmost end;
(4) starting a liquid injection pump, pumping liquid into the high-pressure energy storage device, and observing the reading of a pressure gauge on the high-capacity high-pressure energy storage device;
(5) when the reading of a pressure gauge on the high-pressure energy accumulator reaches a set value, starting the high-capacity high-pressure energy accumulator and the stepless speed change motor, enabling liquid to flow into a piston cylinder in the pulse generation clamping box, driving a waveform cam on a rotary base wheel to rotate through a connecting rod by the stepless speed change motor, pushing a plunger downwards, driving a pressure plate connecting rod and a lower pressure plate to press downwards through the plunger, discharging air in the piston cylinder, driving the lower pressure plate to move upwards through the connecting rod, reducing the pressure in the piston cylinder, enabling the liquid to enter the piston cylinder at the moment, keeping the pressure reading in the high-pressure energy accumulator constant, and keeping the injection pressure consistent when the liquid enters the piston cylinder until the piston cylinder is filled with the liquid;
(6) when the pressure plate connecting rod continues to move downwards to extrude the piston cylinder, the second one-way valve is closed, the third one-way valve is opened, and liquid flows into the displacement metering sensor after passing through the third one-way valve;
(7) the hydraulic pulse waveform image is collected by the displacement metering sensor and is output on the display, so that the user can observe the hydraulic pulse waveform image conveniently.
Example 2:
a hydraulic pulse generation experimental device with a customizable waveform is structurally as described in embodiment 1, and is characterized in that a waveform cam comprises a trapezoidal waveform cam 21 as shown in FIG. 4; trapezoidal wave form cam is the eccentric wheel, and half of eccentric wheel is circular, and circular radius is the same with rotatory base wheel radius, and the eccentric wheel opposite side is circular, and 2 circular parts are connected through sharp limit, and circular radius and sharp limit length calculation mode are as follows:
mn＝Lb (Ⅵ)
in the formula: b-amplitude of trapezoidal wave waveform, cm3(ii) a A-cross sectional area of piston cylinder, cm2(ii) a L-radius, cm; m is the gradient of the trapezoidal wave; n-roller speed, r/s; l isb-cam linear edge length;
the radius of the circle is calculated by the formula (IV), and the length of the straight line side is calculated by the formulas (V) and (VI), so that the size of the trapezoidal wave-shaped cam is determined.
The trapezoidal waveform is shown in FIG. 6, the abscissa is time, the ordinate is displacement, the frequency is 1/40Hz, and the amplitude is 200cm3The wave cam rotates for 40s in one period, and the cross section area of the piston cylinder is 10cm2And the rotating speed of the roller is 0.36r/s, and the data is substituted into a formula to obtain that the radius of the circle is 20cm and the length of the straight line edge is 18 cm.
Claims (10)
1. A hydraulic pulse generation experimental device capable of customizing waveforms is characterized by comprising an energy storage device, a pulse generation device, a power device and a displacement metering device, wherein,
the top end of the pulse generating device is provided with a power device, the two sides of the pulse generating device are respectively provided with an energy storage device and a discharge capacity metering device, and the discharge capacity metering device is used for detecting and displaying an experimental result.
2. The hydraulic pulse generation experiment device capable of customizing waveforms according to claim 1, wherein the energy storage device comprises a liquid storage tank, a liquid injection pump and a high-pressure energy storage device, the liquid storage tank is connected with the high-pressure energy storage device through the liquid injection pump, a pressure gauge is arranged on the high-pressure energy storage device, and the high-pressure energy storage device is connected with the pulse generation device.
3. The hydraulic pulse generation experiment device capable of customizing waveforms according to claim 2, wherein a first check valve is arranged on a connecting line between the liquid injection pump and the high-pressure energy accumulator, and a second check valve is arranged on a connecting line between the high-pressure energy accumulator and the pulse generation device.
4. The hydraulic pulse generation experimental device capable of customizing waveforms according to claim 3, wherein the pulse generation device comprises a plunger, a lower pressing plate, an upper pressing plate, a pressing plate connecting rod, a piston cylinder and a pulse generation clamping box, the piston cylinder is arranged in the pulse generation clamping box, the lower pressing plate is arranged in the piston cylinder, the pressing plate connecting rod is arranged on the lower pressing plate, the pressing plate connecting rod penetrates through the pulse generation clamping box to be connected with the upper pressing plate, the spring is sleeved on the upper pressing plate above the pulse generation clamping box, the plunger is arranged on the upper pressing plate, and the power device is arranged on the plunger.
5. The customizable waveform hydraulic pulse generation experimental facility of claim 4, wherein the plunger is provided with a roller steel groove.
6. The hydraulic pulse generation experiment device capable of customizing waveforms according to claim 5, wherein the power device comprises a stepless speed change motor, a connecting rod, a rotary base wheel and a waveform cam, the waveform cam is arranged on the upper side of the plunger, the rotary base wheel is arranged on the waveform cam, and the rotary base wheel is connected with the stepless speed change motor through the connecting rod.
7. The customizable waveform hydraulic pulse generation experimental facility of claim 6, wherein the waveform cam comprises a sine wave waveform cam and a trapezoidal wave waveform cam.
8. The hydraulic pulse generation experiment device with customizable waveforms of claim 7, wherein the connecting rod is connected with a rotary base wheel through a bolt, and the rotary base wheel is connected with a waveform cam through a clamping groove in an embedded manner.
9. The customizable waveform hydraulic pulse generation experimental facility of claim 8, wherein the displacement metering device comprises a displacement metering sensor and a display, the displacement metering sensor is connected with the pulse generation clamping box through a pipeline, and the displacement metering sensor is connected with the display;
and a third one-way valve is arranged on a connecting pipeline of the displacement metering sensor and the pulse generation clamping box.
10. A method of testing a customizable waveform hydraulic pulse generation test set forth in claim 9, comprising the steps of:
(1) firstly, checking whether a stepless speed change motor and a displacement metering sensor are normal or not, and checking the air tightness of each pipeline and structure;
(2) according to the waveform requirement, selecting a specific waveform cam, and embedding and fixing the waveform cam on the rotary base wheel through a clamping groove;
(3) starting the infinitely variable speed motor, driving the connecting rod and the rotary base wheel to rotate by the infinitely variable speed motor, and turning off the infinitely variable speed motor when the spring supporting upper pressure plate reaches the topmost end;
(4) starting a liquid injection pump, pumping liquid into the high-pressure energy storage device, and observing the reading of a pressure gauge on the high-capacity high-pressure energy storage device;
(5) when the reading of a pressure gauge on the high-pressure energy accumulator reaches a set value, starting the high-capacity high-pressure energy accumulator and the stepless speed change motor, enabling liquid to flow into a piston cylinder in the pulse generation clamping box, driving a waveform cam on a rotary base wheel to rotate through a connecting rod by the stepless speed change motor, pushing a plunger downwards, driving a pressure plate connecting rod and a lower pressure plate to press downwards through the plunger, discharging air in the piston cylinder, driving the lower pressure plate to move upwards through the connecting rod, reducing the pressure in the piston cylinder, enabling the liquid to enter the piston cylinder at the moment, keeping the pressure reading in the high-pressure energy accumulator constant, and keeping the injection pressure consistent when the liquid enters the piston cylinder until the piston cylinder is filled with the liquid;
(6) when the pressure plate connecting rod continues to move downwards to extrude the piston cylinder, the second one-way valve is closed, the third one-way valve is opened, and liquid flows into the displacement metering sensor after passing through the third one-way valve;
(7) the hydraulic pulse waveform image is collected by the displacement metering sensor and is output on the display, so that the user can observe the hydraulic pulse waveform image conveniently.
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