CN115030931A - Closed hydraulic system, fracturing truck and closed hydraulic system control method - Google Patents
Closed hydraulic system, fracturing truck and closed hydraulic system control method Download PDFInfo
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- CN115030931A CN115030931A CN202210764721.4A CN202210764721A CN115030931A CN 115030931 A CN115030931 A CN 115030931A CN 202210764721 A CN202210764721 A CN 202210764721A CN 115030931 A CN115030931 A CN 115030931A
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- hydraulic system
- closed hydraulic
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- pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
Abstract
The invention relates to the technical field of fracturing trucks, in particular to a closed hydraulic system, a fracturing truck and a control method of the closed hydraulic system. The closed hydraulic system comprises an open pump, a hydraulic motor, an oil supplementing pump, a back pressure valve and an unloading valve, wherein an oil outlet of the open pump is connected with an inlet of the hydraulic motor through a first pipeline, an outlet of the hydraulic motor is connected with an oil suction port of the open pump through a second pipeline, an oil outlet of the oil supplementing pump is connected with the oil suction port of the open pump, the back pressure valve is connected with the second pipeline, and an oil outlet of the unloading valve is connected with the second pipeline. The closed hydraulic system provided by the invention reduces the technical redundancy of the closed hydraulic system, improves the heat dissipation performance of the system, reduces the system cost and the production period, and improves the service performance of the system.
Description
Technical Field
The invention relates to the technical field of fracturing trucks, in particular to a closed hydraulic system, a fracturing truck and a control method of the closed hydraulic system.
Background
Fracturing is an important technical means for increasing storage and increasing production of oil and gas fields, and formation fractures need to be firstly fractured by means of high-pressure fluid, and then fracturing sand is filled into the fractures, so that the formation permeability is enhanced, and the oil and gas yield is improved. At present, two types of fracturing trucks are mainly available in the market, wherein one type of fracturing truck is a mechanical fracturing truck, an engine or a motor is used as power, and a fracturing pump is driven in a mechanical transmission mode; the other type is a hydraulic fracturing truck, which adopts an engine or a motor as power and adopts a hydraulic transmission mode to drive a fracturing pump.
In the prior art, the hydraulic fracturing truck usually adopts a closed hydraulic system of a closed pump, and for the hydraulic system only having load unidirectional motion, the hydraulic fracturing truck has the advantages of complex system structure, poor heat dissipation capability of the system, high system cost and long production period of the system.
Disclosure of Invention
The invention provides a closed hydraulic system, which is used for solving the defects of complex system structure, poor heat dissipation capability and high cost of a hydraulic system of a hydraulic fracturing truck in the prior art and improving the service performance of the system.
The invention provides a closed hydraulic system which comprises an open pump, a hydraulic motor, an oil supplementing pump, a back pressure valve and an unloading valve, wherein an oil outlet of the open pump is connected with an inlet of the hydraulic motor through a first pipeline, an outlet of the hydraulic motor is connected with an oil suction port of the open pump through a second pipeline, an oil outlet of the oil supplementing pump is connected with the oil suction port of the open pump, the back pressure valve is connected to the position, close to the oil suction port of the open pump, of the second pipeline, and an oil outlet of the unloading valve is connected with the second pipeline.
The closed hydraulic system further comprises a constant pressure pipeline connected with the open pump, and a pressure reducing valve is arranged on the constant pressure pipeline.
The closed hydraulic system further comprises a one-way valve arranged at an oil outlet of the open pump.
According to the closed hydraulic system provided by the invention, the closed hydraulic system further comprises an accumulator, and the accumulator is connected with the first pipeline.
According to the closed hydraulic system provided by the invention, a control valve is arranged on a connecting pipeline between the energy accumulator and the first pipeline.
According to the closed hydraulic system provided by the invention, the closed hydraulic system further comprises a safety valve connected with the first pipeline.
According to the closed hydraulic system provided by the invention, a flushing cooling pipeline is connected between the shell of the hydraulic motor and the second pipeline, and the flushing cooling pipeline is provided with a fixed orifice.
According to the closed hydraulic system provided by the invention, the open pump is a variable pump; the hydraulic motor is an open motor or a closed motor; the hydraulic motor is a fixed displacement motor or a variable displacement motor.
The invention further provides a fracturing truck which comprises the closed hydraulic system.
The invention also provides a control method of the closed hydraulic system, which adopts the closed hydraulic system and specifically comprises the following steps:
starting the engine;
the closed hydraulic system is in a standby state, and synchronously controls the open pump to output according to a first displacement, the unloading valve to be opened and the hydraulic motor to be in a zero displacement;
the closed hydraulic system receives a load starting instruction;
the closed hydraulic system is in a load starting state, and synchronously controls the open pump to output according to a first displacement, the unloading valve to close and the hydraulic motor to be in a second displacement;
the closed hydraulic system receives a load demand instruction;
the closed type hydraulic system is in a load working state, the displacement of the open type pump is adjusted firstly according to the load requirement, and then the displacement of the hydraulic motor is adjusted.
According to the closed hydraulic system provided by the invention, the oil outlet of the open pump is connected with the inlet of the hydraulic motor through the first pipeline, and the outlet of the hydraulic motor is connected with the oil suction port of the open pump through the second pipeline, so that a closed circulation loop is formed, the technical redundancy of the closed hydraulic system is reduced, and the system cost and the production period are reduced; the oil supplementing pump is arranged at the oil suction port of the open pump, so that oil in the hydraulic oil tank can be supplemented to the oil suction side of the open pump, the oil suction capacity of the open pump is ensured, hot oil in a system is replaced, and the heat dissipation capacity of the system is enhanced; the back pressure valve is arranged on the second pipeline close to the oil suction port of the open pump, so that the oil suction capacity of the open pump can be ensured while the oil suction port of the open pump is prevented from being over-pressurized, hot oil in the system can be replaced, and the heat dissipation capacity of the system is improved; the oil outlet of the unloading valve is connected to the second pipeline, so that when the system is in a standby state, redundant flow can be unloaded by matching with the control system, the pressure of the first pipeline and the pressure of the second pipeline are balanced, and the hydraulic motor is prevented from rotating in the standby state.
The fracturing truck provided by the invention comprises the closed hydraulic system. Because this fracturing unit truck is provided with foretell closed hydraulic system for this fracturing unit truck has above-mentioned closed hydraulic system's whole advantages, and then has improved this fracturing unit truck's performance.
After the engine is started, synchronously controlling the open type pump to output according to the minimum displacement, opening the unloading valve and keeping the hydraulic motor at zero displacement; after the closed hydraulic system receives a load starting instruction, synchronously controlling the open pump to output according to the minimum displacement, closing the unloading valve and keeping the hydraulic motor at the maximum displacement; after the closed type hydraulic system receives a load demand instruction, the displacement of the open type pump is adjusted firstly according to the load demand, and then the displacement of the motor is adjusted. That is, the control method of the closed hydraulic system provided by the invention can eliminate the influence of output possibly existing when the open pump is in standby on the load, and prevent the hydraulic motor from rotating to cause injury to equipment personnel in the standby state.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a block diagram of a closed hydraulic system provided by the present invention;
fig. 2 is a flowchart of a closed hydraulic system control method provided by the present invention.
Reference numerals:
1: an open pump; 2: an oil replenishing pump; 3: a control valve; 4: an accumulator; 5: a hydraulic motor; 6: a fixed orifice; 7: a pressure reducing valve; 8: an unloading valve; 9: a back pressure valve; 10: a safety valve; 11: a one-way valve; 12: a first pipeline; 13: a second pipeline; 14: a constant pressure pipeline; 15: and flushing the cooling pipeline.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
A specific embodiment of the closed hydraulic system of the present invention is described below with reference to fig. 1.
The closed hydraulic system comprises an open pump 1, an oil supplementing pump 2, a hydraulic motor 5, an unloading valve 8 and a back pressure valve 9, wherein an oil outlet of the open pump 1 is connected with an inlet of the hydraulic motor 5 through a first pipeline 12, and an outlet of the hydraulic motor 5 is connected with an oil suction port of the open pump 1 through a second pipeline 13, so that a closed circulation loop is formed. Wherein the first line 12 belongs to a high pressure line and the second line 13 belongs to a low pressure line. That is, applying the open pump 1 in a closed hydraulic system reduces the technical redundancy of the closed hydraulic system for a hydraulic system in which only unidirectional movement of the load is present.
Wherein, the oil outlet of the oil supply pump 2 is connected with the oil suction port of the open pump 1, and the oil inlet of the oil supply pump 2 is connected with a hydraulic oil tank (not shown). That is, the oil supplementing pump 2 is arranged on the oil suction side of the open pump 1, so that oil in the hydraulic oil tank can be supplemented to the oil suction side of the open pump 1, the oil suction capacity of the open pump 1 is guaranteed, hot oil in a system can be replaced, and the heat dissipation capacity of the system is enhanced.
The back pressure valve 9 is connected with the second pipeline 13, so that overpressure of an oil suction port of the open pump 1 can be prevented, oil suction capacity of the open pump 1 is guaranteed, hot oil in the system can be replaced, and heat dissipation capacity of the system is further improved.
The unloading valve 8 is connected with the second pipeline 13, so that when the system is in a standby state, redundant flow can be unloaded by matching with a control system, the pressure of the first pipeline 12 and the pressure of the second pipeline 13 are balanced, and the hydraulic motor 5 is prevented from rotating in the standby state.
Therefore, the closed hydraulic system provided by the embodiment of the invention optimizes the system structure, reduces the system cost, shortens the production period, improves the heat dissipation performance of the system, ensures the safety and reliability of the system operation, and further improves the service performance of the system.
The closed hydraulic system provided by the embodiment of the invention is applied to a hydraulic fracturing truck.
In particular, in the closed hydraulic system of the embodiment of the invention, the number of the open pumps 1 can be set to be one or more, wherein the number of the open pumps 1 is determined by the functional parameters of the fracturing truck.
The open type pump 1 adopts a variable displacement pump, and the output flow of the open type pump 1 in standby is set to be zero or the minimum displacement.
Specifically, in the closed hydraulic system of the embodiment of the present invention, the number of the hydraulic motors 5 may be set to be one or more, wherein the number of the hydraulic motors 5 is determined by calculating the functional parameters of the fracturing truck and the number of the open pumps 1 thereof.
Wherein, according to the actual use demand, the hydraulic motor 5 can adopt an open motor or a closed motor. The hydraulic motor 5 may be a fixed displacement motor or a variable displacement motor. In the present embodiment, the hydraulic motor 5 is a variable displacement closed motor, and the displacement thereof may be set to zero.
As shown in fig. 1, in the closed hydraulic system of an embodiment, a plurality of open pumps 1 are provided, a plurality of hydraulic motors 5 are provided, when the closed hydraulic system works, the open pumps 1 are used as power of the closed hydraulic system and driven by an engine or an electric motor, the engine or the electric motor is connected with the open pumps 1 through a gearbox, the open pumps 1 are combined to drive the hydraulic motors 5, and then the fracturing pumps are driven to work through the hydraulic motors 5.
Specifically, in the closed hydraulic system according to the embodiment of the present invention, the number of the oil supply pumps 2 may be determined according to the total number and the requirement of the open pumps 1. Wherein, the oil inlet of each oil supply pump 2 is respectively connected with a hydraulic oil tank.
Specifically, the unloading valve 8 may be an electromagnetic valve, a hydraulic control valve, or another module with an unloading function according to actual use requirements.
Specifically, according to actual use requirements, the backpressure valve 9 can adopt a check valve, an overflow valve or other functional modules capable of limiting pressure.
In some embodiments of the present invention, the closed hydraulic system further includes a constant pressure line 14 connected to the open pump 1, and the pressure reducing valve 7 is provided on the constant pressure line 14. When a plurality of open pumps 1 are provided, each open pump 1 is connected with the constant pressure pipeline 14. By controlling the pressure reducing valve 7, a pressure source of constant pressure can be introduced into each open pump 1 through the constant pressure pipeline 14, the pressure source is provided for the pilot variable of the first-come pump, and the open pump 1 can be normally varied from a standby state.
In some embodiments of the invention, the closed hydraulic system further comprises a check valve 11 arranged at the oil outlet of the open pump 1. When the open pump 1 is provided with a plurality of open pumps, a one-way valve 11 is arranged at the oil outlet of each open pump 1.
In some embodiments of the invention, the closed hydraulic system further comprises an accumulator 4, the accumulator 4 being connected to the first line 12. The number of the accumulators 4 and the parameters (volume, charge pressure, etc.) are calculated by a closed hydraulic system. By arranging the energy accumulator 4 on the first pipeline 12 of the closed hydraulic system, the pressure fluctuation of the high-pressure oil way 12 during the working of the system can be reduced, and the service lives of the system and hydraulic elements are prolonged.
Wherein, still be equipped with control valve 3 on the connecting line between energy storage ware 4 and first pipeline 12, when needs overhaul, when dismantling energy storage ware 4, can close control valve 3, it is more convenient to operate. The control valve 3 can adopt a manual control valve or an automatic control valve according to the actual use requirement.
In some embodiments of the invention, the closed hydraulic system further comprises a safety valve 10 connected to the first line 12 for protecting the system.
In some embodiments of the invention, when the hydraulic motor 5 is not provided with a flushing module, a flushing cooling line 15 may be provided between the housing of the hydraulic motor 5 and the second line 13, wherein the flushing cooling line 15 is provided with a fixed orifice 6, so that hydraulic oil in the second line 13 is introduced into the housing of the hydraulic motor 5, flush-cooled to the hydraulic motor 5, and discharged from another oil drain of the hydraulic motor 5.
When the hydraulic motor 5 is provided with a flushing module, the flushing cooling line 15 may not be provided.
The embodiment of the invention also provides a fracturing truck which comprises the closed hydraulic system of the embodiment. Because this fracturing unit truck is provided with the closed hydraulic system of above-mentioned embodiment for this fracturing unit truck has above-mentioned closed hydraulic system's whole advantages, and then has improved this fracturing unit truck's performance.
As shown in fig. 2, an embodiment of the present invention further provides a method for controlling a closed hydraulic system, where the method includes the following steps:
the engine is started.
The closed hydraulic system is in a standby state, the open pump is synchronously controlled to output according to the first displacement, the unloading valve is opened, and the hydraulic motor is in zero displacement.
The closed hydraulic system receives a load starting instruction.
The closed hydraulic system is in a load starting state, the open pump is synchronously controlled to output according to the first displacement, the unloading valve is closed, and the hydraulic motor is in the second displacement.
The closed hydraulic system receives a load demand command.
The closed hydraulic system is in a load working state, and the displacement of the open pump is adjusted firstly and then the displacement of the hydraulic motor is adjusted according to the load requirement.
And when the closed hydraulic system receives a load stop instruction, the closed hydraulic system is in a standby state again.
The first displacement is the minimum displacement of the normal working displacement range of the open type pump. That is, when the closed hydraulic system is in a standby state, the open pump is synchronously controlled to output according to the minimum displacement, the unloading valve is opened and the hydraulic motor is in a zero displacement.
And the second displacement is the maximum displacement of the normal working displacement range of the hydraulic motor. That is, when the closed hydraulic system is in a load starting state, the open pump is synchronously controlled to output according to the minimum displacement, the unloading valve is closed, and the hydraulic motor is in the maximum displacement.
The load in the closed hydraulic system is a fracturing pump, and the fracturing pump is at zero displacement and zero pressure in a load starting state. In a load working state, the displacement of the open pump needs to be adjusted preferentially according to the displacement and pressure required by the fracturing pump, and finally the displacement of the hydraulic motor is adjusted.
Therefore, the control method of the closed hydraulic system provided by the invention can eliminate the influence of output possibly existing when the open pump is in a standby state on the load and prevent the hydraulic motor from rotating to cause injury to equipment personnel in the standby state.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A closed hydraulic system is characterized in that: the oil outlet of the open pump is connected with the inlet of the hydraulic motor through a first pipeline, the outlet of the hydraulic motor is connected with the oil suction port of the open pump through a second pipeline, the oil outlet of the oil supplementing pump is connected with the oil suction port of the open pump, the back pressure valve is connected with the second pipeline, and the oil outlet of the unloading valve is connected with the second pipeline.
2. The closed hydraulic system according to claim 1, wherein: the constant pressure pipeline is connected with the open pump, and a pressure reducing valve is arranged on the constant pressure pipeline.
3. The closed hydraulic system according to claim 1, wherein: the oil pump also comprises a one-way valve arranged at an oil outlet of the open pump.
4. The closed hydraulic system according to claim 1, wherein: the energy accumulator is connected with the first pipeline.
5. The closed hydraulic system according to claim 4, wherein: and a control valve is arranged on a connecting pipeline between the energy accumulator and the first pipeline.
6. The closed hydraulic system according to claim 1, wherein: also included is a relief valve connected to the first conduit.
7. The closed hydraulic system according to claim 1, wherein: and a flushing cooling pipeline is connected between the shell of the hydraulic motor and the second pipeline, and is provided with a fixed orifice.
8. The closed hydraulic system according to claim 1, wherein: the open pump is a variable pump; the hydraulic motor is an open motor or a closed motor; the hydraulic motor is a fixed displacement motor or a variable displacement motor.
9. The utility model provides a fracturing unit truck which characterized in that: comprising a closed hydraulic system according to any one of claims 1 to 8.
10. A closed hydraulic system control method is characterized in that: the closed hydraulic system according to any one of claims 1 to 9, comprising:
starting the engine;
the closed hydraulic system is in a standby state, and synchronously controls the open pump to output according to a first displacement, the unloading valve to be opened and the hydraulic motor to be in a zero displacement;
the closed hydraulic system receives a load starting instruction;
the closed hydraulic system is in a load starting state, and synchronously controls the open pump to output according to a first displacement, the unloading valve to close and the hydraulic motor to be in a second displacement;
the closed hydraulic system receives a load demand instruction;
the closed type hydraulic system is in a load working state, the displacement of the open type pump is adjusted firstly according to the load requirement, and then the displacement of the hydraulic motor is adjusted.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210764721.4A CN115030931B (en) | 2022-06-29 | 2022-06-29 | Closed hydraulic system, fracturing truck and control method of closed hydraulic system |
| PCT/CN2022/111186 WO2024000738A1 (en) | 2022-06-29 | 2022-08-09 | Closed hydraulic system, fracturing truck, and closed hydraulic system control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210764721.4A CN115030931B (en) | 2022-06-29 | 2022-06-29 | Closed hydraulic system, fracturing truck and control method of closed hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115030931A true CN115030931A (en) | 2022-09-09 |
| CN115030931B CN115030931B (en) | 2023-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210764721.4A Active CN115030931B (en) | 2022-06-29 | 2022-06-29 | Closed hydraulic system, fracturing truck and control method of closed hydraulic system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115030931B (en) |
| WO (1) | WO2024000738A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2931433Y (en) * | 2006-06-12 | 2007-08-08 | 上海三一科技有限公司 | Enclosed up-down hydraulic system |
| CN211951029U (en) * | 2020-04-23 | 2020-11-17 | 三一石油智能装备有限公司 | Closed internal circulation hydraulic system and fracturing truck |
| CN213176233U (en) * | 2020-09-30 | 2021-05-11 | 三一石油智能装备有限公司 | Motor control system and driving device |
| CN113124002A (en) * | 2021-05-19 | 2021-07-16 | 三一石油智能装备有限公司 | Fracturing truck hydraulic system and control method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012102978B4 (en) * | 2012-04-05 | 2014-11-13 | Fluitronics Gmbh | Closed hydraulic circuit |
| CN205663665U (en) * | 2015-11-18 | 2016-10-26 | 宝鸡石油机械有限责任公司 | Special -purpose vehicle closed -type hydraulic system with open pump |
| CN210889116U (en) * | 2019-10-31 | 2020-06-30 | 三一石油智能装备有限公司 | Fracturing unit truck hydraulic motor drive arrangement and fracturing unit truck |
| CN110778551B (en) * | 2019-11-30 | 2024-04-30 | 安徽柳工起重机有限公司 | Full-closed hydraulic system of crane |
| CN113669312A (en) * | 2021-09-08 | 2021-11-19 | 三一石油智能装备有限公司 | Closed hydraulic control system and engineering machinery |
-
2022
- 2022-06-29 CN CN202210764721.4A patent/CN115030931B/en active Active
- 2022-08-09 WO PCT/CN2022/111186 patent/WO2024000738A1/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2931433Y (en) * | 2006-06-12 | 2007-08-08 | 上海三一科技有限公司 | Enclosed up-down hydraulic system |
| CN211951029U (en) * | 2020-04-23 | 2020-11-17 | 三一石油智能装备有限公司 | Closed internal circulation hydraulic system and fracturing truck |
| CN213176233U (en) * | 2020-09-30 | 2021-05-11 | 三一石油智能装备有限公司 | Motor control system and driving device |
| CN113124002A (en) * | 2021-05-19 | 2021-07-16 | 三一石油智能装备有限公司 | Fracturing truck hydraulic system and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115030931B (en) | 2023-06-20 |
| WO2024000738A1 (en) | 2024-01-04 |
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