CN203939795U - Hydraulic power unit - Google Patents
Hydraulic power unit Download PDFInfo
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- CN203939795U CN203939795U CN201420267070.9U CN201420267070U CN203939795U CN 203939795 U CN203939795 U CN 203939795U CN 201420267070 U CN201420267070 U CN 201420267070U CN 203939795 U CN203939795 U CN 203939795U
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- 239000012530 fluid Substances 0.000 claims abstract description 98
- 239000007788 liquid Substances 0.000 claims abstract description 56
- 239000003921 oil Substances 0.000 claims description 94
- 230000009467 reduction Effects 0.000 claims description 21
- 239000002828 fuel tank Substances 0.000 claims description 20
- 239000010729 system oil Substances 0.000 claims description 9
- 239000003129 oil well Substances 0.000 abstract description 13
- 238000013461 design Methods 0.000 abstract description 5
- 230000002146 bilateral effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 21
- 239000010720 hydraulic oil Substances 0.000 description 17
- 238000005086 pumping Methods 0.000 description 17
- 238000005381 potential energy Methods 0.000 description 12
- 238000009825 accumulation Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 238000009434 installation Methods 0.000 description 8
- 230000002457 bidirectional effect Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000003028 elevating effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model is hydraulic power unit, is used to oil well lifting that power is provided.The Double shaft-extension motor two ends of this device connect separately a multiaxis and stretch gearbox, and the output shaft that multiaxis is stretched gearbox connects separately: or a hydraulic motor/pump, or unloaded; The liquid entering hole of hydraulic motor/pump is connected in parallel; The liquid outlet of hydraulic motor/pump connects separately: or a lifting fluid cylinder, or an accumulator; The hydraulic motor/pump at described Double shaft-extension motor two ends is always in different states: one end is motor state, and the other end is pump state.Owing to having adopted double extension shaft motor, in double extension shaft motor bilateral symmetry, hydraulic motor/pump and lifting fluid cylinder system are installed, this design makes the stressed more even of motor, has reduced motor installed power, has improved system works efficiency.
Description
Technical field
The utility model relates to the pumping unit that petroleum production well mechanical oil recovery uses, and is hydraulic power unit specifically, is used to oil well that power is provided.
Background technique
In the production run of oil well, adopt the oil well of artificial lift stratum liquid to be given rise to ground by the mechanical, electrical power on ground.Existing artificial lift method has pumping unit rod pump, electric submersible pump, screw pump, gaslift etc., and wherein pumping unit rod pump is comparatively economical and a kind of most widely used method.
Main Pumping Unit type has beam pumping unit and tower shelf type oil pumping machine at present.
In recent years, started exploration, the test of hydraulic pumping unit both at home and abroad, and compared with mechanical transmission pumping unit, hydraulic transmission has advantages of that parameter is easy to adjust, it is high automatically to control degree.
Chinese patent, number of patent application 2013202894086, May 24 2013 applying date, patent name " a kind of hydraulic oil pumping device " has been applied for a kind of hydraulic oil pumping device, this device comprises reciprocating oil cylinder, accumulator, described reciprocating oil cylinder comprises elevating ram and is arranged on the lift ram of elevating ram inside and reciprocatory motion, described lift ram lower end connects oil pumping polish rod, and oil pumping polish rod connecting downhole roofbolt load, described elevating ram is connected with accumulator by hydraulic oil pipe, on described hydraulic oil pipe, be provided with two-way hydraulic motor or bidirectional hydraulic pump.Described accumulator comprises accumulation of energy oil cylinder, accumulation of energy gas bag, and described accumulation of energy oil cylinder inside arranges accumulation of energy plunger, and accumulation of energy plunger handle accumulation of energy oil cylinder is divided into accumulation of energy cylinder upper cavity oil chamber and accumulation of energy oil cylinder lower chambers, and described accumulation of energy gas bag is connected with accumulation of energy cylinder upper cavity oil chamber.
From specification and claims analysis of above-mentioned hydraulic oil pumping device, what this invention was used is a kind of bidirectional hydraulic pump in fact, in the time that sucker rod is up, oil hydraulic pump enters elevating ram the oil pump in accumulator, in the time that sucker rod is descending, oil hydraulic pump pumps into accumulator again the oil in elevating ram.From its principle, when sucker rod starts when up, the initial load minimum of sucker rod, but now the pressure in accumulator is the highest, to the driving force maximum of oil hydraulic pump, and the output power minimum of motor; When sucker rod is up and reach after full and down, the pressure in accumulator reduces gradually, and the driving force of oil hydraulic pump is also reduced gradually, and the output power of motor increases gradually, and in the time that sucker rod rises to upper dead center, it is maximum that the output power of motor reaches.Therefore the motor in this device needs relatively high power, and system effectiveness also has much room for improvement.
Chinese patent, application number 201120342359.9, applying date 2011.08.24, denomination of invention " hydraulic pumping unit ", the technological scheme of this patent is motor one end Flywheel, the other end drives bidirectional hydraulic plunger pump, and bidirectional hydraulic plunger pump is connected with lifting fluid cylinder, and lifting fluid cylinder is connected with sucker rod.Under the control of control gear, bidirectional hydraulic plunger pump is realized Positive-Negative Action and then is driven lifting fluid cylinder to move up and down.The descending potential energy of sucker rod stores with the rotation of flywheel.This covering device has better solved the adjusting of the upper and lower travel speed of sucker rod and has prevented from solving the stuck problem of sucker rod, but be subject to the restriction of motor speed, the energy storage of its flywheel is limited, accumulation of energy transformation efficiency is low, potential energy descending sucker rod all can not be stored, therefore also to exist motor installed power larger for this device, the problem that system effectiveness has much room for improvement.
U. S. Patent, on August 14 2008 applying date, application number 12/192,022, authorizes document number US8087904B2, authorization date on January 3rd, 2012, patent name: liquid-electricity mixing pumping unit with down stroke energy recovery function.This device comprises motor, fuel tank, change displacement plunger pump, rod string, oil hydraulic cylinder and controller.Become displacement plunger pump and both can drive oil hydraulic cylinder to carry out lifting underground sucker rod post from fuel tank oil suction, also can under the high pressure liquid force feed of oil hydraulic cylinder drives, rotate, make motor in generating state.The potential energy that this invention has solved in the descending process of sucker rod well reclaims problem.But in the up process of sucker rod, motor not only will promote the weight of sucker rod, also wants the production fluid under winding shaft, and therefore the installed power of motor is still very large, this is also uneconomical.
Summary of the invention
In order to utilize more fully the descending potential energy of sucker rod, reduce the installed power of motor, improve system effectiveness, the utility model provides that a kind of system effectiveness is higher, the hydraulic power unit of balancing the load better effects if.
The technical solution of the utility model is:
Preferred embodiment:
Hydraulic power unit, comprises Double shaft-extension motor, and described Double shaft-extension motor two ends connect separately a multiaxis and stretch gearbox, and the output shaft that multiaxis is stretched gearbox connects separately: or a hydraulic motor/pump, or unloaded; The liquid entering hole of hydraulic motor/pump is connected in parallel, and the liquid outlet of hydraulic motor/pump connects separately: or a lifting fluid cylinder, or an accumulator; The hydraulic motor/pump at described Double shaft-extension motor two ends is always in different states: one end is motor state, and the other end is pump state.
The liquid entering hole of hydraulic motor/pump is connected in parallel and also can be connected with liquid-supplying system, described liquid-supplying system comprises the oil hydraulic pump, relief valve, cooler and the fuel tank that connect with oil pipe, oil hydraulic pump entrance connects fuel tank, oil hydraulic pump outlet connects relief valve entrance, connects the liquid entering hole of hydraulic motor/pump between oil hydraulic pump outlet and relief valve entrance; Cooler is arranged in liquid-supplying system oil pipe loop.
On the oil pipe line that connects accumulator, can also be connected in series pressure control device, described pressure control device comprises one-way valve and reduction valve, the entrance parallel connection of the outlet of one-way valve and reduction valve, the outlet parallel connection of the entrance of one-way valve and reduction valve, the wherein outlet of one-way valve and the entrance of the reduction valve accumulator entrance that is jointly connected in parallel.
Preferred embodiment:
Hydraulic power unit, comprise Double shaft-extension motor, it is characterized in that, described Double shaft-extension motor two ends connect separately more than two multiaxis being installed in series and stretch gearbox, the output shaft that multiaxis is stretched gearbox connects separately: or a hydraulic motor/pump, or unloaded; The liquid entering hole of hydraulic motor/pump is connected in parallel, and the liquid outlet of hydraulic motor/pump connects separately: or a lifting fluid cylinder, or an accumulator; The hydraulic motor/pump at described Double shaft-extension motor two ends is always in different states: one end is motor state, and the other end is pump state.
The liquid entering hole of hydraulic motor/pump is connected in parallel and also can be connected with liquid-supplying system, described liquid-supplying system comprises the oil hydraulic pump, relief valve, cooler and the fuel tank that connect with oil pipe, oil hydraulic pump entrance connects fuel tank, oil hydraulic pump outlet connects relief valve entrance, connects the liquid entering hole of hydraulic motor/pump between oil hydraulic pump outlet and relief valve entrance; Cooler is arranged in liquid-supplying system oil pipe loop.
On the oil pipe line that connects accumulator, can also be connected in series pressure control device, described pressure control device comprises one-way valve and reduction valve, the entrance parallel connection of the outlet of one-way valve and reduction valve, the outlet parallel connection of the entrance of one-way valve and reduction valve, the wherein outlet of one-way valve and the entrance of the reduction valve accumulator entrance that is jointly connected in parallel.
Compared with prior art, the invention has the beneficial effects as follows, owing to having adopted double extension shaft motor, in double extension shaft motor bilateral symmetry, hydraulic motor/pump and lifting fluid cylinder system are installed, realize lifting liquid cylinder piston and moved up and down and synchronize and carry out with downhole pump up-down stroke; In running, the descending potential energy of a side load (as sucker rod) becomes the up power of opposite side load (as sucker rod), and this design makes the stressed more even of motor, has reduced motor installed power, has improved system works efficiency.
Brief description of the drawings
Describe simply the present invention above, next further, at length narrated the present invention with reference to the drawing of describing following specific embodiment of the present invention.These drawings have only been described some typical embodiments of this invention, therefore can not think to limit the scope of the invention.In these drawings:
Fig. 1 is hydraulic power unit basic comprising schematic diagram.
Fig. 2 is the hydraulic power unit basic comprising schematic diagram that contains liquid-supplying system.
Fig. 3 is the hydraulic power unit basic comprising schematic diagram that contains liquid-supplying system and accumulator.
Fig. 4 is many lifting fluid cylinder schematic diagram of hydraulic power unit balanced configuration.
Fig. 5 is hydraulic power unit symmetrical arrangements lifting fluid cylinder schematic diagram.
Fig. 6 is the accumulator that is connected to one-way valve and relief valve.
Fig. 7 is hydraulic power unit one-sided configuration lifting fluid cylinder schematic diagram.
Fig. 8 is that Double shaft-extension motor is stretched gearbox driving hydraulic motor/pump schematic diagram by multiaxis.
Fig. 9 is the schematic diagram of replacing a lifting fluid cylinder in Fig. 8 device with an accumulator.
Figure 10 is that the output shaft that in Fig. 8 device, multiaxis is stretched gearbox is unloaded situation schematic diagram.
Figure 11 is the schematic diagram that has the hydraulic power unit that many gearboxes are installed in series.
Figure 12 is that hydraulic oil cylinder device is connected in series schematic diagram.
In accompanying drawing, in order to distinguish two identical devices of explanation, use a, b to represent, as 3a, 3b refer to hydraulic motor/pump 3.
Embodiment
First explain two table apparatus:
1. Double shaft-extension motor: there is output shaft at the two ends that refer to motor simultaneously, are called Double shaft-extension motor in present specification.
2. hydraulic motor/pump:
According to " mechanical design handbook, the 4th volume ", Wen Bangchun chief editor, China Machine Press, the 5th edition second impression April in 2010,22-80 page, oil hydraulic pump comprises plunger pump, screw pump, gear pump, vane pump, 22-177 page, oil hydraulic motor comprises: piston motor, screw motor, gear motor and sliding-vane motor etc.Usually, this class hydraulic pressure installation is alone, or as oil hydraulic pump, or as oil hydraulic motor.Can find out from Der Grundsatz der Maschinen and the structure of this class hydraulic pressure installation, this class hydraulic machinery both can be used as oil hydraulic pump and also can be used as oil hydraulic motor and use, in the present invention, exactly using this hydraulic pressure installation as the hydraulic machinery with motor and two kinds of functions of pump, such as plunger type, screw type, gear type, blade type etc., when it is in pump state, will after the low-pressure hydraulic oil pressurization of suction, pump; When it is in motor state, high pressure liquid force feed drives its axle to rotate, thereby drives other machinery.In the present invention, indication hydraulic motor/pump comprises fixed displacement and becomes discharge capacity two classes, in accompanying drawing, only represents to become displacement hydraulic motor/pump.This class both can be used as oil hydraulic pump and also can be used as the hydro-mechanical unit existing market that oil hydraulic motor uses and just have product, and the A2F series pump/motor that for example ShanghaiElectrical Appliance Hydraulic air-powered Co., Ltd. Hydraulic Pump Factory produces is the A6VG oblique-axis axial piston variable motro that clino-axis type quantitative plunger pump/motor, moral great achievement hydraulics Co., Ltd of Beijing China produce.
In present specification about " liquid entering hole " of hydraulic motor/pump and the description of " liquid outlet " explanation: the hydraulic pipe line connection mouth of hydraulic motor/pump has two, when it is during in pump state, a connection mouth feed liquor, another connection mouth fluid; When it is during in motor state, liquid entering hole when said pump state becomes liquid outlet, and liquid outlet when said pump state becomes liquid entering hole.In order to narrate conveniently, in present specification, the connection mouth of hydraulic motor/pump and liquid-supplying system is described as to " liquid entering hole ", being described as " liquid outlet " with the connection mouth of lifting fluid cylinder or accumulator.
Referring to Fig. 1 hydraulic power unit basic comprising schematic diagram.Hydraulic power unit, Double shaft-extension motor 1 two ends connect a hydraulic motor/pump 3 separately, and the liquid entering hole that the liquid outlet of hydraulic motor/pump 3 connects 5, two hydraulic motor/pumps 3 of lifting fluid cylinder is separately connected in parallel.
Double shaft-extension motor 1 connects hydraulic motor/pump 3 by coupling 2, and in fact the connection between the each transmission shaft of machinery and hydraulic transmission generally all connects by coupling, in the narration below of this Placement, no longer repeats.Hydraulic system Ye road connects by oil pipe, as the liquid outlet of hydraulic motor/pump 3 connects lifting fluid cylinder 5 by oil pipe 15, some valves are also installed as required on the connecting pipeline of hydraulic system as valve 16, in the narration below of this Placement, are also no longer repeated.Lifting fluid cylinder 5 is arranged on and on oil well, is used for promoting sucker rod, lifting fluid cylinder 5 comprises fluid cylinder cover 10 and piston 11, piston 11 is divided into upper and lower two hydraulic pressure cavity fluid cylinder, for lifting sucker rod, yes is connected with the following hydraulic pressure cavity of lifting fluid cylinder 5 for hydraulic motor/pump 3, in the narration below this Placement, also no longer repeats.
When Double shaft-extension motor 1 both sides configure holohedral symmetry time, said system just can have been moved.But in order to solve the supplementary question of hydraulic oil loss in running and the cooling problem of system liquid force feed, design liquid-supplying system, the hydraulic power unit basic comprising schematic diagram that contains liquid-supplying system referring to Fig. 2.Double shaft-extension motor 1 two ends connect a hydraulic motor/pump 3 separately, and the liquid entering hole that the liquid outlet of hydraulic motor/pump 3 connects 5, two hydraulic motor/pumps 3 of lifting fluid cylinder is separately connected in parallel.The liquid entering hole of described hydraulic motor/pump 3 is connected with liquid-supplying system, described liquid-supplying system comprises oil hydraulic pump 17, relief valve 19, cooler 20 and fuel tank 18, oil hydraulic pump 17 entrances connect fuel tank 18, oil hydraulic pump 17 outlets connect relief valve 19 entrances, export the liquid entering hole that connects hydraulic motor/pump 3 between relief valve 19 entrances at oil hydraulic pump 17.For the heat dissipation problem in resolution system running, relief valve 19 exports between oil hydraulic pump 17 entrances and connects cooler 20, cooler 20 can be arranged between relief valve 19 entrances and oil hydraulic pump 17 outlets certainly, that is to say, cooler 20 is arranged in liquid-supplying system oil pipe loop, in the narration below this mounting type, no longer repeats.
If be filled with hydraulic oil in the initial installation of system, its heat dissipation problem has also solved in other pipeline, and above-mentioned liquid-supplying system also can not installed.That is to say, in following each embodiment, liquid-supplying system can be installed, and also can not install.But following each embodiment describes so that liquid-supplying system to be installed.
The hydraulic power unit basic comprising schematic diagram that contains liquid-supplying system and accumulator referring to Fig. 3.Double shaft-extension motor 1 two ends connect a hydraulic motor/pump 3 separately, and the liquid entering hole that the liquid outlet of hydraulic motor/pump 3 connects 5, two hydraulic motor/pumps 3 of lifting fluid cylinder is separately connected in parallel.The liquid entering hole of described hydraulic motor/pump 3 is connected with liquid-supplying system, described liquid-supplying system comprises oil hydraulic pump 17, relief valve 19, cooler 20 and fuel tank 18, oil hydraulic pump 17 entrances connect fuel tank 18, oil hydraulic pump 17 outlets connect relief valve 19 entrances, export the liquid entering hole that connects hydraulic motor/pump 3 between relief valve 19 entrances at oil hydraulic pump 17, cooler 20 is arranged in liquid-supplying system oil pipe loop.In actual moving process, lifting fluid cylinder 5 is arranged on oil well, the sucker rod load that each lifting fluid cylinder 5 is born sometimes can be not identical, for the be in operation imbalance problem of load of Double shaft-extension motor 1 both sides of solving device, in the less side of load, for example in Fig. 3, left side lifting fluid cylinder 5a connects accumulator 4.
Referring to many lifting fluid cylinder schematic diagram of Fig. 4 hydraulic power unit balanced configuration.On the device basic shown in Fig. 3, for reducing number of devices and investment, with the more well recoveries of few device drives, many lifting fluid cylinders of the balanced configuration shown in Fig. 4 are designed.The quantity of lifting fluid cylinder 5 is to install about Double shaft-extension motor 1 is symmetrical, and the quantity of the lifting fluid cylinder 5 on each limit is more than 1.Except the difference of the quantity of lifting fluid cylinder 5, other formation is identical with the device shown in Fig. 3.In the time of the loading imbalance of Double shaft-extension motor 1 both sides, a side less in load connects accumulator 4.
Usually, as shown in Figure 4, between each lifting fluid cylinder 5 of Double shaft-extension motor 1 one sides, if there is accumulator also to comprise accumulator 4, be the installation that is connected in parallel.Certainly, if desired, between each lifting fluid cylinder 5, if there is accumulator also to comprise accumulator 4, also can be to be connected in series installation, as shown in figure 12, namely the lower hydraulic pressure chamber of lifting fluid cylinder 5 be designed to two oil pipe connection mouths, hydraulic motor/pump 3 connects a lifting fluid cylinder 5, between each lifting fluid cylinder 5, is mutually serially connected by oil pipe connection mouth again.Placement between each lifting fluid cylinder (if having accumulator also to comprise accumulator) no longer repeats in the narration of back.
As shown in Figure 3, lifting fluid cylinder 5 comprises fluid cylinder cover 10 and piston 11, and piston 11 is divided into upper and lower two chambeies fluid cylinder cover 10; Accumulator also comprises cylinder sleeve 31 and separator piston 32, and separator piston 32 is divided into upper and lower two chambeies cylinder sleeve 31; Therefore, lifting fluid cylinder and accumulator can be referred to as to hydraulic oil cylinder device, that is to say, in present specification, described hydraulic oil cylinder device can be lifting fluid cylinder, can be also accumulator, can be also that lifting fluid cylinder connects accumulator.
Referring to Fig. 5 hydraulic power unit symmetrical arrangements lifting fluid cylinder schematic diagram.The oil well quantity in a well site is odd number sometimes, can not meet the installation requirement of many lifting fluid cylinders of the balanced configuration shown in Fig. 4, in order to address this problem, has designed many lifting fluid cylinders of the symmetrical arrangements shown in Fig. 5.Due to the loading imbalance about double extension shaft motor both sides, accumulator is arranged on the side that load is less.Except the quantity of lifting fluid cylinder is asymmetric and must install accumulator in the less side of load, other formation is identical with the device shown in Fig. 4.In fact, in the device shown in Fig. 4, when wherein a bite well or several mouthfuls of wells break down while stopping producing, just occurred the asymmetric problem of quantity of lifting fluid cylinder, Fig. 4 shown device is at this moment just identical with Fig. 5 shown device.
Hydraulic coupling in lifting fluid cylinder depends on the down-hole load that fluid cylinder connects, and in the time that lifting fluid cylinder enters up stroke, the sucker rod load that lifting fluid cylinder connects mainly comprises sucker rod deadweight and the suffered hydraulic coupling of oil pump plunger piston; In the time that lifting fluid cylinder enters down stroke, the sucker rod load that lifting fluid cylinder connects is mainly sucker rod deadweight.In Fig. 3, Fig. 4 and Fig. 5, the lifting fluid cylinder in left side is directly connected with accumulator, like this left side lifting fluid cylinder during in up stroke the pressure in accumulator high, and left side lifting fluid cylinder during in down stroke the pressure in accumulator low, just there are two problems in this, the one, transfer down stroke at left side lifting fluid cylinder to from up stroke initial, because the pressure in accumulator is higher than pressure that in lifting fluid cylinder, rod weight produces, the initial sucker rod load of down stroke just can not be descending, can extend like this time of down stroke; The 2nd, it is initial that the lifting fluid cylinder on right side enters up stroke, sucker rod load becomes deadweight from deadweight and adds the hydraulic coupling that oil pump plunger piston is suffered, load significantly increases, because sucker rod is longer, its elastic elongation amount is just longer, and therefore its load increase has a process, initial minimum, then be increased to gradually maximum value, if the pressure in the accumulator in left side discharges from maximum pressure, this is unfavorable to reducing the installed power of motor.In order to address this problem, design the accumulator that is connected to pressure control device, referring to Fig. 6, on the oil pipe line that connects accumulator, be connected in series pressure control device, described pressure control device comprises one-way valve 61 and reduction valve 62, the entrance parallel connection of the outlet of one-way valve 61 and reduction valve 62, the outlet parallel connection of the entrance of one-way valve 61 and reduction valve 62, the wherein entrance of the outlet of one-way valve 61 and reduction valve 62 accumulator 4 entrances that are jointly connected in parallel.On accumulator connecting pipeline, install after pressure control device, reduce pressure by reduction valve, pressure while making the interior down stroke of the head pressure of accumulator and the lifting fluid cylinder of homonymy approaches, just can not hinder the initial downlink of sucker rod, also reduced the initial head pressure of accumulator simultaneously, extend the working application time of accumulator, be conducive to reduce the installed power of motor.
Referring to Fig. 7 hydraulic power unit one-sided configuration lifting fluid cylinder schematic diagram.Double shaft-extension motor 1 two ends of hydraulic power unit connect a hydraulic motor/pump 3 separately, wherein the liquid outlet of hydraulic motor/pump 3a connects one or more lifting fluid cylinder 5, the liquid entering hole that the liquid outlet of another hydraulic motor/pump 3b connects 4, two hydraulic motor/pumps of accumulator is connected in parallel.With aforementioned same reason, the liquid entering hole of two hydraulic motor/pumps is connected in parallel and can also be connected with liquid-supplying system, described liquid-supplying system comprises the oil hydraulic pump 17, relief valve 19, cooler 20 and the fuel tank 18 that connect with oil pipe, oil hydraulic pump 17 entrances connect fuel tank 18, oil hydraulic pump 17 outlets connect relief valve 19 entrances, export the liquid entering hole that connects two hydraulic motor/pumps between relief valve 19 entrances at oil hydraulic pump 17; Cooler 20 is arranged in liquid-supplying system oil pipe loop.On the oil pipe line that connects accumulator, can also be connected in series the pressure control device shown in Fig. 6.
Stretch gearbox referring to Fig. 8 Double shaft-extension motor by multiaxis and drive hydraulic motor/pump schematic diagram.Double shaft-extension motor 1 two ends of hydraulic power unit connect separately a multiaxis and stretch gearbox 81, and it can be three shaft extension gearboxes or four shaft extension gearboxes that multiaxis is stretched gearbox 81, and the output shaft that multiaxis is stretched gearbox 81 connects a hydraulic motor/pump 3 separately; The liquid entering hole of each hydraulic motor/pump 3 is connected in parallel; The liquid outlet of hydraulic motor/pump 3 connects a lifting fluid cylinder 5 separately.With aforementioned same reason, the liquid entering hole of two hydraulic motor/pumps is connected in parallel and can also be connected with liquid-supplying system, described liquid-supplying system comprises the oil hydraulic pump 17, relief valve 19, cooler 20 and the fuel tank 18 that connect with oil pipe, oil hydraulic pump 17 entrances connect fuel tank 18, oil hydraulic pump 17 outlets connect relief valve 19 entrances, export the liquid entering hole that connects hydraulic motor/pump between relief valve 19 entrances at oil hydraulic pump 17; Cooler 20 is arranged in liquid-supplying system oil pipe loop.
Referring to Fig. 9, Fig. 9 is the schematic diagram of replacing a lifting fluid cylinder in Fig. 8 device with an accumulator.When well site, oil well quantity is odd number, or the oil well failure that a lifting fluid cylinder in Fig. 8 is installed stops production, or when the loading imbalance of Double shaft-extension motor both sides, a lifting fluid cylinder in Fig. 8 is replaced with to accumulator 4, make the load of the Double shaft-extension motor both sides balance of trying one's best.Certainly, on the oil pipe line that connects accumulator, can also be connected in series the pressure control device shown in Fig. 6.
Referring to Figure 10, Figure 10 is that the output shaft that in Fig. 8 device, multiaxis is stretched gearbox is unloaded situation schematic diagram.When well site, oil well quantity is odd number, and the lifting fluid cylinder quantity of Fig. 8 shown device Double shaft-extension motor both sides can asymmetric installation, if when now the load of Double shaft-extension motor both sides is in a basic balance, one or two output shaft of a gearbox can be unloaded.
There is the schematic diagram of the hydraulic power unit that many gearboxes are installed in series referring to Figure 11.Double shaft-extension motor 1 two ends of hydraulic power unit connect separately more than two multiaxis being installed in series and stretch gearbox 81, it can be three shaft extension gearboxes or four shaft extension gearboxes that multiaxis is stretched gearbox, to stretch gearbox 81 are four shaft extension gearboxes to multiaxis as shown in FIG., multiaxis is stretched the output shaft of gearbox 81a and multiaxis and is stretched the input shaft of gearbox 81b and be connected, and this connecting mode is called hereof multiaxis and stretches being installed in series of gearbox; According to the quantity of well site oil well and load condition, the output shaft that multiaxis is stretched gearbox 81 connects separately: or a hydraulic motor/pump 3, or unloaded; The liquid entering hole of hydraulic motor/pump 3 is connected in parallel; The liquid outlet of hydraulic motor/pump 3 connects separately: or a lifting fluid cylinder 5, or an accumulator 4.With aforementioned same reason, the liquid entering hole of hydraulic motor/pump 3 is connected in parallel and can also be connected with liquid-supplying system, described liquid-supplying system comprises the oil hydraulic pump 17, relief valve 19, cooler 20 and the fuel tank 18 that connect with oil pipe, oil hydraulic pump 17 entrances connect fuel tank 18, oil hydraulic pump 17 outlets connect relief valve 19 entrances, export the liquid entering hole that connects hydraulic motor/pump 3 between relief valve 19 entrances at oil hydraulic pump 17; Cooler 20 is arranged in liquid-supplying system oil pipe loop.On the oil pipe line that connects accumulator, can also be connected in series the pressure control device shown in Fig. 6.
The working principle of hydraulic power unit is:
Referring to Fig. 3, lifting fluid cylinder 5 is arranged on well head, and lifting fluid cylinder 5 is a kind of single-acting fluid cylinders, and the piston 11 of lifting fluid cylinder 5 is connected with sucker rod.Do again a supposition: when hydraulic motor/pump 3 forward, being pump state, is motor state when reversion.
From usability, Double shaft-extension motor 1 adopts switching magnetic-resistance Double shaft-extension reversing motor better.Double shaft-extension motor 1 control gear control, in the time that lifting fluid cylinder 5 arrives upper dead center or lower dead centre, control gear control Double shaft-extension motor 1 carries out clockwise and anticlockwise commutation.Clear in order to illustrate, control gear is attached not shown in FIG. this specification, and the Double shaft-extension motor described in this specification has comprised its control gear.
Start upstroke as example taking the piston of lifting fluid cylinder 5a, while normally production, Double shaft-extension motor 1 forward, drive hydraulic motor/pump 3a forward, hydraulic motor/pump 3a is pump state, and it sucks oil from pipeline and supercharging pumps in lifting fluid cylinder 5a, promotes the piston stroking upward of lifting fluid cylinder 5a; Simultaneously, hydraulic motor/pump 3b reversion, hydraulic motor/pump 3b is now motor state, it is descending that the piston of lifting fluid cylinder 5b is pulled by sucker rod, the potential energy of sucker rod down stroke is converted into the pressure energy of hydraulic oil in lifting fluid cylinder 5b, high pressure liquid force feed drives hydraulic motor/pump 3b reversion output shaft power, and hydraulic motor/pump 3b drives hydraulic motor/pump 3a together with Double shaft-extension motor 1 like this, and the descending potential energy of right side well rod just transforms the energy for left side oil well oil-pumping.Narration is above to carry out from the angle of transformation of energy, retells flowing of hydraulic oil in oil circuit below.In lifting fluid cylinder 5b, hydraulic oil drives after hydraulic motor/pump 3b, becomes low pressure from high pressure, flows to the entrance of hydraulic motor/pump 3a along oil circuit, after hydraulic motor/pump 3a pressurization, pumps into lifting fluid cylinder 5a.
In the time that lifting fluid cylinder 5a arrives upper dead center, Double shaft-extension motor 1 becomes reversion, now, the piston of lifting fluid cylinder 5a becomes descending, and the piston of lifting fluid cylinder 5b becomes up, hydraulic motor/pump 3a becomes motor state from pump state, and hydraulic motor/pump 3b becomes pump state from motor state, and the mobile and previous state of transformation of energy mode, hydraulic oil completely conversely.
In the time of the loading imbalance of Double shaft-extension motor both sides, accumulator need to be installed, such as the lifting merit when left side oil well is compared with right side hour, unnecessary energy is just stored in accumulator 4.
The effect of liquid-supplying system is: 1, the hydraulic oil loss of replenishment system; 2, in half-closed loop, replace a part of deep fat and realize the cooling of hydraulic oil with cold oil.
In above-mentioned explanation, hydraulic power unit is used as pumping unit.In the time many covers hudraulic lift device being installed in a building, hydraulic power unit of the present invention also can be used for driving many cover hudraulic lift devices.Similarly, hydraulic power unit of the present invention can be used in such occasion or device: more than two device pumps, and more than one installs descending potential energy and can and need to be converted into and more than another, install up energy.Based on above-mentioned explanation, pump the above method of device of two of a kind of drivings, drives the device that pumps with above-mentioned hydraulic power unit.
Based on above-mentioned explanation, hydraulic power unit of the present invention provides a kind of potential energy method for transformation: use a Double shaft-extension motor, the each self-driven hydraulic motor/pump in Double shaft-extension motor two ends, described hydraulic motor/pump drives lifting fluid cylinder, and lifting fluid cylinder is connected with load; Double shaft-extension motor is clockwise and anticlockwise automatically under the control of control gear, and the hydraulic motor/pump at Double shaft-extension motor two ends is always simultaneously respectively in different states: or pump state or motor state; The lifting fluid cylinder of Double shaft-extension motor both sides is always simultaneously respectively in different states: or up stroke state or down stroke state; The potential energy of the load it being connected in the lifting fluid cylinder of down stroke state is converted into hydraulic energy and drives the hydraulic motor/pump in motor state, hydraulic motor/pump in motor state drives in the hydraulic motor/pump of pump state and drives lifting fluid cylinder lifting load together with Double shaft-extension motor, and the potential energy of descending like this load is just converted into the potential energy of up load.
Based on above-mentioned explanation, the operating method of hydraulic power unit of the present invention, its step comprises:
1. hydraulic power unit is installed;
2. each lifting fluid cylinder is connected with load respectively, and makes the piston of lifting fluid cylinder of Double shaft-extension motor one side in upper dead center, and the piston of the lifting fluid cylinder of opposite side is in lower dead centre;
3. switch on power;
4. start the oil hydraulic pump (this step is only applicable to the hydraulic power unit of liquid-supplying system) of liquid-supplying system;
5. adjust the control gear of Double shaft-extension motor, the starting sense of rotation of Double shaft-extension motor is met: the hydraulic motor/pump being connected in the lifting fluid cylinder of upper dead center with piston is in motor state;
6. start Double shaft-extension motor.
Embodiment as herein described is only exemplary embodiments, but is not limited only to these embodiments, and those skilled in the art can make amendment under not departing from spirit of the present invention and enlightening.May there is a lot of changes, combination and amendment in scheme disclosed herein; and all within the scope of the invention, therefore, protection domain is not limited only to explanation above; but define according to claim, protection domain comprises all equivalents of the target of claim.
Claims (6)
1. hydraulic power unit, comprise Double shaft-extension motor (1), hydraulic motor/pump (3) and lifting fluid cylinder (5), it is characterized in that, described Double shaft-extension motor (1) two ends connect separately a multiaxis and stretch gearbox (81), the output shaft that multiaxis is stretched gearbox (81) connects separately: or a hydraulic motor/pump (3), or unloaded; The liquid entering hole of hydraulic motor/pump (3) is connected in parallel; The liquid outlet of hydraulic motor/pump (3) connects separately: or a lifting fluid cylinder (5), or an accumulator (4); The hydraulic motor/pump (3) at described Double shaft-extension motor (1) two ends is always in different states: one end is motor state, and the other end is pump state.
2. hydraulic power unit according to claim 1, it is characterized in that, the liquid entering hole of hydraulic motor/pump (3) is connected in parallel and is connected with liquid-supplying system, described liquid-supplying system comprises the oil hydraulic pump (17), relief valve (19), cooler (20) and the fuel tank (18) that connect with oil pipe, oil hydraulic pump (17) entrance connects fuel tank (18), oil hydraulic pump (17) outlet connects relief valve (19) entrance, connects the liquid entering hole of hydraulic motor/pump (3) between oil hydraulic pump (17) outlet relief valve (19) entrance; Cooler (20) is arranged in liquid-supplying system oil pipe loop.
3. hydraulic power unit according to claim 1 and 2, it is characterized in that, on the oil pipe line that connects accumulator (4), be connected in series pressure control device, described pressure control device comprises one-way valve (61) and reduction valve (62), the entrance parallel connection of the outlet of one-way valve (61) and reduction valve (62), the outlet parallel connection of the entrance of one-way valve (61) and reduction valve (62), the wherein entrance of the outlet of one-way valve (61) and reduction valve (62) accumulator (4) entrance that is jointly connected in parallel.
4. hydraulic power unit, comprise Double shaft-extension motor (1), hydraulic motor/pump (3) and lifting fluid cylinder (5), it is characterized in that, described Double shaft-extension motor (1) two ends connect separately more than two multiaxis being installed in series and stretch gearbox (81), the output shaft that multiaxis is stretched gearbox (81) connects separately: or a hydraulic motor/pump (3), or unloaded; The liquid entering hole of hydraulic motor/pump (3) is connected in parallel; The liquid outlet of hydraulic motor/pump (3) connects separately: or a lifting fluid cylinder (5), or an accumulator (4); The hydraulic motor/pump at described Double shaft-extension motor two ends is always in different states: one end is motor state, and the other end is pump state.
5. hydraulic power unit according to claim 4, it is characterized in that, the liquid entering hole of hydraulic motor/pump (3) is connected in parallel and is connected with liquid-supplying system, described liquid-supplying system comprises the oil hydraulic pump (17), relief valve (19), cooler (20) and the fuel tank (18) that connect with oil pipe, oil hydraulic pump (17) entrance connects fuel tank (18), oil hydraulic pump (17) outlet connects relief valve (19) entrance, connects the liquid entering hole of hydraulic motor/pump (3) between oil hydraulic pump (17) outlet and relief valve (19) entrance; Cooler (20) is arranged in liquid-supplying system oil pipe loop.
6. according to the hydraulic power unit described in claim 4 or 5, it is characterized in that, on the oil pipe line that connects accumulator (4), be connected in series pressure control device, described pressure control device comprises one-way valve (61) and reduction valve (62), the entrance parallel connection of the outlet of one-way valve (61) and reduction valve (62), the outlet parallel connection of the entrance of one-way valve (61) and reduction valve (62), the wherein entrance of the outlet of one-way valve (61) and reduction valve (62) accumulator (4) entrance that is jointly connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420267070.9U CN203939795U (en) | 2014-05-23 | 2014-05-23 | Hydraulic power unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420267070.9U CN203939795U (en) | 2014-05-23 | 2014-05-23 | Hydraulic power unit |
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| Publication Number | Publication Date |
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| CN203939795U true CN203939795U (en) | 2014-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420267070.9U Expired - Lifetime CN203939795U (en) | 2014-05-23 | 2014-05-23 | Hydraulic power unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612927A (en) * | 2014-12-26 | 2015-05-13 | 东莞光洋信息科技有限公司 | Center hydraulic pump and drive mechanism thereof |
| CN106194857A (en) * | 2015-05-07 | 2016-12-07 | 中国石油化工股份有限公司 | Hydraulic lifting and automaton |
| CN110319065A (en) * | 2019-07-04 | 2019-10-11 | 西安交通大学 | A kind of hydraulic mechanism moving back and forth energy for recycling human body back weight bearing |
-
2014
- 2014-05-23 CN CN201420267070.9U patent/CN203939795U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612927A (en) * | 2014-12-26 | 2015-05-13 | 东莞光洋信息科技有限公司 | Center hydraulic pump and drive mechanism thereof |
| CN106194857A (en) * | 2015-05-07 | 2016-12-07 | 中国石油化工股份有限公司 | Hydraulic lifting and automaton |
| CN110319065A (en) * | 2019-07-04 | 2019-10-11 | 西安交通大学 | A kind of hydraulic mechanism moving back and forth energy for recycling human body back weight bearing |
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| C14 | Grant of patent or utility model | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20141112 |