CN108443099B - Composite transmission device for fracturing plunger pump - Google Patents
Composite transmission device for fracturing plunger pump Download PDFInfo
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- CN108443099B CN108443099B CN201810397174.4A CN201810397174A CN108443099B CN 108443099 B CN108443099 B CN 108443099B CN 201810397174 A CN201810397174 A CN 201810397174A CN 108443099 B CN108443099 B CN 108443099B
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- reduction mechanism
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 29
- 239000002131 composite material Substances 0.000 title description 2
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 230000009467 reduction Effects 0.000 claims abstract description 29
- 230000001360 synchronised effect Effects 0.000 claims abstract description 10
- 150000001875 compounds Chemical class 0.000 claims abstract description 7
- 238000005461 lubrication Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 54
- 238000005553 drilling Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Transmission Device (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention relates to a compound transmission device for a fracturing plunger pump, which comprises a box body, a hydraulic torque converter, a planetary speed reducing mechanism, a friction plate brake assembly, a comprehensive control valve, a speed reducing mechanism II and an electric actuator, wherein the box body is provided with a hydraulic torque converter; the hydraulic torque converter comprises an input shaft I, a triple oil supply pump, a synchronous ring, a guide wheel, a turbine shaft and a pump impeller; the sun gear of the planetary reduction mechanism is coaxially driven by a turbine shaft, and the gear ring is contacted with and separated from a friction plate in the friction plate brake assembly under hydraulic control; the planet carrier of the planetary reduction mechanism is connected with and drives an input shaft II of a reduction mechanism II; the integrated control valve comprises a valve body, an overflow valve core and an electromagnetic switch valve; the electric actuator drives the shifting fork through the lead screw connecting rod mechanism and the synchronizing ring; the shifting fork drives the adjustable guide wheel blade to rotate around the axis of the shifting fork. The device solves the problem that the prior art lacks a special transmission device for the fracturing plunger pump through a brand new structural design, and has positive technical significance.
Description
Technical Field
The invention relates to a compound transmission device for a fracturing plunger pump, and belongs to the field of petroleum drilling and processing equipment.
Background
In the field of current petroleum drilling equipment, plunger pumps are important components; among them, reciprocating type plunger pumps represented by five-cylinder fracturing plunger pumps of F1300, F1600, SQP2000, SQP2800 are one of the types of plunger pumps with a large equipment amount.
In practical use, because the actual working conditions of the drilling and production and well killing processes are needed, the plunger pump needs to be subjected to wide-range speed regulation.
Taking the F1300 drill pump as an example, the common configuration is that a diesel engine, a tyre clutch (an air bag clutch), a mechanical speed reducer drive the drill pump through a belt or a diesel engine, a hydraulic coupler and a reverse car speed reducer drive the drill pump through a universal shaft. When the driller's law well-killing operation is adopted, the pump speed of the drilling pump is usually 1/2-1/4 of the normal drilling pump speed in order to facilitate the control of the throttle valve and the vertical pressure in the well-killing process. To achieve low pumping, the currently common measures mainly include: the diesel engine runs at a low rotation speed (the rated rotation speed is 1300rpm and is regulated to 800-1000 rpm), and the medium rods of two cylinders of the three-cylinder plunger pump are removed. The operation mode has the defects that the diesel engine is not suitable for long-time low-speed and large-load operation, and the diesel engine is adversely affected under the working condition for a long time; frequent disassembly and assembly of the cylinder sleeve medium rod of the drilling pump can bring a great deal of heavy physical labor to a mud worker. Although the speed reduction box of the hydraulic coupler for the reverse vehicle has certain speed regulation type energy, the speed regulation range is recommended to be 70-100% based on the performance characteristics of the speed regulation type hydraulic coupler (matched with constant torque equipment), and the requirement of wide-range speed regulation cannot be met.
Taking the SQP2800 five-cylinder fracturing plunger pump as an example, the common configuration at present is that a diesel engine and a multi-gear (hydraulic) mechanical gearbox drive the plunger pump through a cardan shaft. Typical representatives of multi-speed (hydromechanical) gearboxes are: TWIN DISC TA90-8501/8FLW-2302 gearbox (9), ai Lixun 9832 OFS gearbox (9), CAT TH55-E70 gearbox (7). Because no special gearbox is provided at present for the matched requirement of the fracturing pump, the gearbox for the high-power mine car is used for driving the fracturing pump. The three types of gears 4 and above are not needed by matching calculation, and the rotation speed of the plunger pump in the gears 4 and above far exceeds the allowable rotation speed, so that an inapplicable 'surplus' design exists. Acidizing fracturing, on the other hand, is a very complex and variable regime. Under complex geological conditions, the pumping pressure is more alternating and the impact load is more high in fracturing operation; in order to ensure the safety of fracturing operation and ensure that a fracturing pump is not overpressured, a program linkage mode of diesel engine speed reduction and gearbox speed reduction is generally adopted at present. This mode is less adaptable and cannot meet the "sustained high pressure" operating requirements.
Therefore, designing a special transmission device which is more suitable for the speed regulation driving of the reciprocating plunger pump is a problem to be solved by the person skilled in the art.
Disclosure of Invention
In the prior art, the reciprocating plunger pump lacks a special transmission device, and the adopted non-special speed regulating device has the problems of unmatched characteristics with a diesel engine and difficult adaptation to working conditions of the reciprocating plunger pump in the drilling and production and well killing processes; in order to solve the problem, the invention provides a novel compound transmission device for a fracturing plunger pump, which is used for stepless speed regulation driving of a reciprocating plunger pump in the process of drilling and production well killing.
The invention adopts the following technical scheme:
A compound transmission for a fracturing plunger pump, comprising: the hydraulic torque converter comprises a box body, a hydraulic torque converter, a planetary speed reducing mechanism, a friction plate brake assembly, a comprehensive control valve, a speed reducing mechanism II and an electric actuator;
The hydraulic torque converter comprises an input shaft I, a triple oil supply pump, a synchronous ring, a guide wheel, a turbine shaft and a pump wheel; the input shaft I is an input shaft of the whole transmission device; the triple oil supply pump is arranged on the end face of the input end of the hydraulic torque converter, two pumps are communicated with the working cavity of the hydraulic torque converter, and the other pump is communicated with the oil supply port of the friction plate brake assembly through the comprehensive control valve; the guide wheel is adjustable, and comprises fixed guide wheel blades and adjustable guide wheel blades; the synchronizing ring is arranged at the outer edge of the triple oil supply pump and can rotate around the triple oil supply pump;
The sun gear of the planetary reduction mechanism is coaxially connected and driven by the turbine shaft, and the gear ring is contacted with and separated from the friction plate in the friction plate brake assembly under the hydraulic control;
the planet carrier of the planetary reduction mechanism is connected with and drives an input shaft II of a reduction mechanism II; the output shaft of the speed reducing mechanism II is the output shaft of the whole transmission device;
The integrated control valve is arranged at an oil supply port of the friction plate brake assembly and comprises a valve body, an overflow valve core and an electromagnetic switch valve, wherein the overflow valve core and the electromagnetic switch valve are arranged at an oil inlet of the integrated control valve in parallel; the outlet of the overflow valve core is communicated with a lubrication system through a pipeline in the box body;
The electric actuator is a multi-rotation intelligent electric actuator, and the synchronous ring is driven by the lead screw connecting rod mechanism; the synchronizing ring is connected with a plurality of groups of shifting forks; each group of shifting forks drives 1 adjustable guide wheel blade to rotate around the axis of the shifting forks; the rotation of all the adjustable guide wheel blades is synchronous.
Preferably, the friction plate brake assembly is a multi-plate wet friction plate brake assembly.
Or preferably, the speed reducing mechanism II is a gear type fixed-shaft single-stage speed reducing mechanism.
Or preferably, the triple oil supply pump is in star arrangement and comprises a shell, a driving gear and 3 driven gears; the shell is provided with an oil inlet channel and 3 oil supply cavities, the driving gear is coaxial and driven by the input shaft I, and the driven gears are respectively arranged in the oil supply cavities.
The invention has the following advantages:
(1) According to the invention, the hydraulic torque converter, the planetary reduction mechanism and the reduction mechanism II are arranged in the same box body, and an integrated design is adopted, so that the device has a compact structure and small occupied space;
(2) The adjustable guide wheel blades are regulated and controlled by using the multi-rotation intelligent electric actuator, so that constant pump flushing (constant flow), constant pressure or computer program control regulation can be realized easily;
(3) Based on the characteristic of the self-adaptive characteristic of the hydraulic torque converter, the hydraulic torque converter is more suitable for the working condition operation requirements of multiple alternating and multiple impact loads;
(4) Based on the characteristic of flexible transmission of hydraulic transmission, the transmission quality of the whole transmission system can be improved, good protection is provided for an engine, a transmission system and a working machine, and the service life of the system is prolonged;
(5) Based on the characteristics and advantages of the hydraulic transmission of the guide wheel blade adjustable hydraulic torque converter, the stepless speed regulation with wide range (20% -100%) and high efficiency and good matching with constant torque equipment can be realized.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2is a left-hand structural schematic of FIG. 1;
FIG. 3 is a schematic view showing the installation structure of the integrated control valve 21 in the embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a triple fuel supply pump 19 according to an embodiment of the present invention;
FIG. 5 is a left side cross-sectional schematic view of FIG. 4;
FIG. 6 is a schematic diagram of the structure of the integrated control valve 21 according to the embodiment of the present invention;
FIG. 7 is a right side cross-sectional schematic view 1 of FIG. 6;
FIG. 8 is a right side cross-sectional schematic view of FIG. 6;
Wherein: 1. a hydraulic torque converter, 2, a planetary reduction mechanism, 3, a reduction mechanism II, 4, an electric actuator, 5, a box, 6, an input shaft I, 7, a pump, 8, a turbine, 9, a fixed idler blade, 10, an adjustable idler blade, 11, a turbine shaft, 12, a sun gear, 13, a friction plate brake assembly, 14, a planet carrier, 15, a gear ring, 16, a screw rod mechanism, 17, a synchronous ring, 18, a shifting fork, 19, a triple oil supply pump, 20, an oil filter, 21, an integrated control valve, 22, a shell, 23, a driving gear, 24, a driven gear, 25, a valve body, 26, an overflow valve core, 27, a shift valve core and 28, an electromagnetic valve.
Detailed Description
The invention will be further described with reference to the drawings and examples.
As shown in fig. 1 and 2, the present embodiment is a compound transmission device for a fracturing plunger pump, including: the hydraulic torque converter comprises a box body 5, a hydraulic torque converter 1, a planetary reduction mechanism 2, a friction plate brake assembly 13, a comprehensive control valve 21, a reduction mechanism II 3 and an electric actuator 4;
The torque converter 1 in this embodiment is a stator vane adjustable torque converter 1, and includes an input shaft i 6, a triple oil supply pump 19, a synchronizing ring 17, a stator, a turbine 8, a turbine shaft 11, and a pump impeller 7; the input shaft I6 is an input shaft of the whole transmission device; the triple oil feed pump 19 is provided at an input end face of the torque converter 1, and has an oil filter 20.
The stator vane adjustable torque converter 1 is a standard structure well-described in the mechanical manual.
The guide wheels are adjustable blades and comprise fixed guide wheel blades 9 and adjustable guide wheel blades 10; the synchronizing ring 17 is mounted on the outer edge of the triple oil supply pump 19 and can rotate around the triple oil supply pump 19;
the sun gear 12 of the planetary reduction mechanism 2 is coaxially connected and driven by the turbine shaft 11;
The friction plate brake assembly 13 is a multi-plate wet friction plate brake assembly and comprises a cylinder sleeve, a piston, a plurality of inner and outer tooth friction plates; the cylinder sleeve is connected with the fixed box body through a connecting key, the external tooth friction plate is connected with the fixed cylinder sleeve through external teeth, and the internal tooth friction plate is contacted with and separated from the gear ring 15 through internal teeth under hydraulic control; the inner and outer tooth friction plates are arranged at intervals along the axis; when the friction plate brake assembly 13 charges oil under the control of an electromagnetic switch valve in the integrated control valve 21, the piston axially compresses the friction plate, the gear ring 15 is braked by the friction plate, the cylinder sleeve and the box body, and the planetary reduction mechanism 2 is in a gear state; when the friction plate brake assembly 13 empties oil under the control of the electromagnetic switch valve, the friction plate is separated from contact with the gear ring 15, the gear ring 15 rotates freely, and the planetary reduction mechanism 2 is in a neutral state; multi-plate wet friction plate brakes are well known in the art.
The speed reducing mechanism II 3 is a gear type fixed-shaft single-stage speed reducing mechanism and comprises an input shaft II, a driving gear, a driven gear and an output shaft, wherein the driving gear and the driven gear are coaxial with the input shaft II; the planet carrier 14 of the planetary reduction mechanism 2 is connected with and drives the input shaft II of the reduction mechanism II 3; the output shaft of the speed reducing mechanism II 3 is the output shaft of the whole transmission device;
The electric actuator 4 is a multi-rotation intelligent electric actuator 4, and the synchronous ring 17 is driven by a lead screw connecting rod mechanism 16; the synchronizing ring 17 is connected with a plurality of groups of shifting forks 18; each group of shifting forks 18 drives 1 adjustable guide wheel blade 10 to rotate around the axis of the shifting forks; the rotations of all the adjustable stator blades 10 are synchronized.
As shown in fig. 4 and 5, the triple oil supply pump 19 is mainly configured to meet oil supply requirements of a hydraulic transmission system, a low-pressure lubrication system, a high-pressure control system and the like of the whole machine, and is in a star arrangement, and comprises a shell 22, a driving gear 23 and 3 driven gears 24; wherein, casing 22 is equipped with oil feed passageway, 3 oil feed chamber, and driving gear 23 passes through spline and input shaft I6 coaxial coupling and is driven by input shaft I6, and driven gear 24 locates the oil feed intracavity respectively. The 3 driven gears 24 are respectively combined with the driving gear 23 to cooperate with oil supply cavities to form three relatively independent oil supply pumps which are assembled by the common shell 22, wherein two pumps supply oil to the working cavity of the hydraulic torque converter 1, and the other pump supplies oil to the friction plate brake assembly 13 and the lubricating system through the integrated control valve 21.
The specific working procedure of this embodiment is as follows:
Power flow:
The power drives a pump wheel 7 through an input shaft I6, the pump wheel 7 pushes working oil to circulate, and mechanical energy is converted into working oil kinetic energy; when working oil with liquid kinetic energy flows through the turbine 8, the liquid flow impacts the blades of the turbine 8, so that the working oil and the pump wheel 7 rotate in the same direction, and the kinetic energy of the working oil is converted into mechanical energy; working oil after releasing kinetic energy flows into the pump wheel 7 again through the turbine 8, the fixed guide wheel blade 9 and the adjustable guide wheel blade 10, and the next circulation is started; the working oil thus establishes a cycle of cyclically alternating between the pump impeller 7, the turbine wheel 8, the fixed stator blades 9, the adjustable stator blades 10, whereby a flexible transfer of energy between the input and the output is achieved without any mechanical connection.
The power drives a sun gear 12 of the planetary reduction mechanism 2 through a turbine 8 and a turbine shaft 11; when the multi-plate wet friction plate brake assembly 13 is locked, the gear ring 15 brakes, power is output through the planet carrier 14, and final power is transmitted to driven equipment through the speed reduction mechanism II 3; when the multi-plate wet friction plate brake assembly 13 is unlocked, the gear ring 15 rotates freely, power is not output, and the transmission device is in a neutral state.
Control flow:
The electric actuator 4 drives the synchronizing ring 17 via the lead screw link mechanism 16; the synchronizing ring 17 drives the adjustable stator blade 10 to rotate via a fork 18. The torque converter has different characteristics corresponding to different angles of rotation of the adjustable stator blade 10. The installation angle and the flow passage area of the blade profile are changed through the rotation of the adjustable guide vanes, so that the energy capacity of the torque converter is changed, the purpose of adjusting the rotating speed of the turbine 8 is achieved, and finally the stepless speed change control is realized.
Working oil flow
Working oil flows into the triple oil feed pump 19 through the oil filter 20; the two pumps supply oil to the working cavity of the torque converter, and the working oil flows back to the oil tank after passing through the working cavity of the torque converter and the external engine oil cooler; the other single pump supplies oil to the high-pressure control system, and working oil flows through the integrated control valve 21 from the pump outlet through an oil way arranged in the box body 5;
In the integrated control valve 21, working oil is divided into two oil passages of "high pressure" and "low pressure" when flowing through the relief valve spool 26 due to the "constant pressure" effect of the relief valve; wherein the low-pressure oil is sent to a lubrication system through a pipeline arranged in the tank body 5; high pressure oil is sent to the multi-plate wet friction plate brake assembly 13 through the shift valve spool 27, and the locking and unlocking of the multi-plate wet friction plate brake assembly is controlled by the electromagnetic valve 28; the electromagnetic switch valve receives a switch signal of the central controller, is electrified and supplies oil to the friction plate brake assembly 13, so that the friction plate is connected with the gear ring 15 due to friction force, and the transmission device is in a power output state; the electromagnetic switch valve is powered off under the control of the signal of the central controller, the friction plate of the friction plate brake assembly 13 is separated from contact with the gear ring 15, and the transmission device is in a neutral state; part of the working oil (low-pressure oil) is fed via a relief valve to the transmission lubrication system and finally flows back to the oil tank.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention, and the parts not described in detail and shown in partial detail may be applied to the prior art and are not described in detail herein. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and features disclosed herein.
Claims (2)
1. A compound transmission for a fracturing plunger pump, comprising: the device comprises a box body (5), a hydraulic torque converter (1), a planetary reduction mechanism (2), a friction plate brake assembly (13), a comprehensive control valve (21), a reduction mechanism II (3) and an electric actuator (4);
The hydraulic torque converter (1) comprises an input shaft I (6), a triple oil supply pump (19), a synchronous ring (17), a guide wheel, a turbine (8), a turbine shaft (11) and a pump impeller (7); the input shaft I (6) is an input shaft of the whole transmission device; the triple oil supply pump (19) is arranged on the end face of the input end of the hydraulic torque converter (1), two pumps are communicated with the working cavity of the hydraulic torque converter (1), and the other pump is communicated with the oil supply port of the friction plate brake assembly (13) through the integrated control valve (21); the guide wheel is adjustable in blade and comprises fixed guide wheel blades (9) and adjustable guide wheel blades (10); the synchronizing ring (17) is arranged on the outer edge of the triple oil supply pump (19) and can rotate around the triple oil supply pump (19);
The sun gear (12) of the planetary reduction mechanism (2) is coaxially connected and driven by the turbine shaft (11), and the gear ring (15) is contacted with and separated from the friction plate in the friction plate brake assembly (13) under the hydraulic control;
The planet carrier (14) of the planetary reduction mechanism (2) is connected with and drives the input shaft II of the reduction mechanism II (3); the output shaft of the speed reducing mechanism II (3) is the output shaft of the whole transmission device;
The integrated control valve (21) is arranged at an oil supply port of the friction plate brake assembly (13) and comprises a valve body (25), an overflow valve core and an electromagnetic switch valve, wherein the overflow valve core and the electromagnetic switch valve are arranged at an oil inlet of the integrated control valve (21) in parallel; the outlet of the overflow valve core is communicated with a lubrication system through a pipeline arranged in the box body (5);
The electric actuator (4) is a multi-rotation intelligent electric actuator (4), and the synchronous ring (17) is driven by a lead screw connecting rod mechanism (16); the synchronizing ring (17) is connected with a plurality of groups of shifting forks (18); each group of shifting forks (18) drives 1 adjustable guide wheel blade (10) to rotate around the axis of the shifting forks; the rotation of all the adjustable guide wheel blades (10) is synchronous;
The friction plate brake assembly (13) is a multi-plate wet friction plate brake assembly (13);
The triple oil supply pump (19) is in star-shaped arrangement and comprises a shell (22), a driving gear (23) and 3 driven gears (24); the shell (22) is provided with an oil inlet channel and 3 oil supply cavities, the driving gear (23) is coaxial and driven by the input shaft I (6), and the driven gears (24) are respectively arranged in the oil supply cavities.
2. The compound transmission for a fracturing plunger pump of claim 1, wherein the reduction mechanism ii (3) is a gear type fixed shaft single stage reduction mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810397174.4A CN108443099B (en) | 2018-04-28 | 2018-04-28 | Composite transmission device for fracturing plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810397174.4A CN108443099B (en) | 2018-04-28 | 2018-04-28 | Composite transmission device for fracturing plunger pump |
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| Publication Number | Publication Date |
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| CN108443099A CN108443099A (en) | 2018-08-24 |
| CN108443099B true CN108443099B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810397174.4A Active CN108443099B (en) | 2018-04-28 | 2018-04-28 | Composite transmission device for fracturing plunger pump |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11746636B2 (en) | 2019-10-30 | 2023-09-05 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing apparatus and control method thereof, fracturing system |
| US11680474B2 (en) | 2019-06-13 | 2023-06-20 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing apparatus and control method thereof, fracturing system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1186902A (en) * | 1966-03-24 | 1970-04-08 | Borg Warner | Planetary Transmission Mechanism |
| CN2622485Y (en) * | 2003-05-30 | 2004-06-30 | 贵州凯星液力传动机械有限公司 | Hydraulic speed variator |
| JP2006112460A (en) * | 2004-10-12 | 2006-04-27 | Toyota Motor Corp | Power transmission device and radial piston pump |
| CN101260933A (en) * | 2008-04-24 | 2008-09-10 | 吉林大学 | Hydraulic mechanical type automatic gear shifting system |
| CN208169068U (en) * | 2018-04-28 | 2018-11-30 | 中国石油天然气集团有限公司 | A kind of compound gearing for pressure break plunger pump |
-
2018
- 2018-04-28 CN CN201810397174.4A patent/CN108443099B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1186902A (en) * | 1966-03-24 | 1970-04-08 | Borg Warner | Planetary Transmission Mechanism |
| CN2622485Y (en) * | 2003-05-30 | 2004-06-30 | 贵州凯星液力传动机械有限公司 | Hydraulic speed variator |
| JP2006112460A (en) * | 2004-10-12 | 2006-04-27 | Toyota Motor Corp | Power transmission device and radial piston pump |
| CN101260933A (en) * | 2008-04-24 | 2008-09-10 | 吉林大学 | Hydraulic mechanical type automatic gear shifting system |
| CN208169068U (en) * | 2018-04-28 | 2018-11-30 | 中国石油天然气集团有限公司 | A kind of compound gearing for pressure break plunger pump |
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| CN108443099A (en) | 2018-08-24 |
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