Hydraulic fluid drive system, fracturing apparatus, and method of driving

Abstract

The application provides an oil liquid driving system, a fracturing device and a driving method. The oil liquid driving system comprises a hydraulic module, a lubricating module and a fan motor. The hydraulic module comprises a hydraulic oil tank, an auxiliary oil supplement pump, a variable motor, a hydraulic pump and a fan motor. The inlet of the auxiliary oil supplement pump is connected with the outlet of the hydraulic oil tank. The outlet of the auxiliary oil supplement pump is connected with the inlet of the variable motor. The outlet of the variable motor is connected with the first inlet of the hydraulic pump. The first outlet of the hydraulic pump is connected with the inlet of the hydraulic oil tank. The second outlet and the second inlet of the hydraulic pump are respectively connected with the inlet and the outlet of the fan motor. The fan motor is used for driving connection with a fan. The lubricating module comprises a lubricating oil tank and a lubricating pump. The inlet of the lubricating pump is connected with the outlet of the lubricating oil tank. The outlet of the lubricating pump is connected with the inlet of a lubricating component. The variable motor is drivingly connected with the lubricating pump, so that the problem that the oil suction capacity of the gear pump of the lubricating oil of the fracturing truck in the prior art is easily affected by temperature is solved.

Description

Technical Field

[0001] This invention relates to the field of fracturing equipment technology, and more specifically, to an oil-driven system, fracturing equipment, and driving method. Background Technology

[0002] Currently, in the oil and gas field sector, especially in the field of low-permeability oil and gas wells, fracturing equipment is the main equipment for extraction and production enhancement. Through the high-pressure pumping system of the fracturing equipment, proppant is injected into the fractures to increase the fluidity of underground oil and gas, thereby achieving the effect of increasing oil and gas production.

[0003] In the above process, the hydraulic and lubrication systems on the fracturing equipment provide important and powerful guarantees for the stable and continuous operation of the fracturing equipment. The oil-driven system drives the fan to operate, providing a suitable working temperature for the heat dissipation of various components of the equipment, so that the working oil in each component is always within the most suitable working temperature range. The stable output of the lubrication system provides the best protective oil film for the continuous operation of the pumping components of the equipment, maximizing the service life of the operating components.

[0004] In the existing technology, there are two common driving methods for fracturing equipment. One method is to connect the engine to the power gear pump, using the engine to directly drive the power gear pump, and then use the hydraulic oil discharged by the power gear pump to drive the fixed displacement motor. The lubrication motor is connected to the lubrication pump in its lubrication system, thereby realizing the lubrication method of hydraulic drive lubrication system. The other method is to directly take power from the engine or gearbox and use the gear pump to suck and discharge oil to provide the necessary lubrication for the lubrication components inside the plunger pump.

[0005] However, the above-mentioned driving method has some problems. The viscosity of lubricating oil increases as the temperature decreases. In cold winter, the increased viscosity of lubricating oil will also increase the power loss. For the scheme that directly uses a gear pump, if the oil suction capacity of the gear pump is poor or the oil suction height is too high, it will directly lead to poor oil suction and even the risk of burning out the pump. Summary of the Invention

[0006] The main objective of this invention is to provide an oil-driven system, fracturing equipment, and driving method to solve the problem that the oil suction capacity of the gear pump of the lubricating oil in the fracturing truck is easily affected by temperature in the prior art.

[0007] To achieve the above objectives, according to a first aspect of the present invention, an oil-driven system is provided, comprising: a hydraulic module including a hydraulic oil tank, an auxiliary replenishing pump, a variable displacement motor, a hydraulic pump, and a fan motor, wherein the inlet of the auxiliary replenishing pump is connected to the outlet of the hydraulic oil tank, the outlet of the auxiliary replenishing pump is connected to the inlet of the variable displacement motor, the outlet of the variable displacement motor is connected to the first inlet of the hydraulic pump, the first outlet of the hydraulic pump is connected to the inlet of the hydraulic oil tank, and the second outlet and second inlet of the hydraulic pump are respectively connected to the inlet and outlet of the fan motor, the fan motor being used for driving connection with fan blades; and a lubrication module including a lubrication oil tank and a lubrication pump, wherein the inlet of the lubrication pump is connected to the outlet of the lubrication oil tank, and the outlet of the lubrication pump is connected to the inlet of a lubrication component; wherein the variable displacement motor is drivingly connected to the lubrication pump.

[0008] Furthermore, the hydraulic module also includes: a first relief valve, the inlet of which is connected to the outlet of the auxiliary replenishing pump, and the outlet of which is connected to the first inlet of the hydraulic pump; and a pressure gauge, which is installed on the connecting pipeline between the inlet of the first relief valve and the outlet of the auxiliary replenishing pump.

[0009] Furthermore, the hydraulic module includes a first check valve, the inlet of which is connected to the outlet of the fan motor, and the outlet of which is connected to the inlet of the fan motor.

[0010] Furthermore, the hydraulic module includes an accumulator, which is disposed on the connecting pipeline between the outlet of the fan motor and the second inlet of the hydraulic pump.

[0011] Furthermore, the hydraulic module includes a second relief valve, the inlet of which is connected to a connecting pipe between the outlet of the fan motor and the second inlet of the hydraulic pump, and the outlet of the second relief valve is connected to the housing inlet of the fan motor and the housing inlet of the hydraulic pump.

[0012] Furthermore, the hydraulic module includes: a hydraulic suction filter, the inlet of which is connected to the outlet of the hydraulic oil tank, and the outlet of which is connected to the inlet of the auxiliary replenishing pump; and a hydraulic return filter, the inlet of which is connected to the first outlet of the hydraulic pump, and the outlet of which is connected to the inlet of the hydraulic oil tank.

[0013] Furthermore, the hydraulic module includes a hydraulic oil cooler, which is installed on the pipeline between the first outlet of the hydraulic pump and the inlet of the hydraulic return oil filter.

[0014] Furthermore, the lubrication module includes a pipeline filter, which is disposed between the outlet of the lubrication pump and the inlet of the lubrication component.

[0015] Furthermore, the lubrication module includes: a thermostat, which is disposed on the connecting pipe between the outlet of the pipeline filter and the inlet of the lubrication component, the inlet of the thermostat being connected to the outlet of the pipeline filter, and the first outlet of the thermostat being connected to the inlet of the lubrication component; and a lubricating oil radiator, the inlet of the lubricating oil radiator being connected to the second outlet of the thermostat, and the outlet of the lubricating oil radiator being connected to the inlet of the lubrication component.

[0016] Furthermore, the lubrication module includes a second check valve, the inlet of which is connected to the second outlet of the thermostat, and the outlet of the lubricating oil radiator is connected to the inlet of the lubrication component.

[0017] Furthermore, the lubrication module includes: a lubrication suction filter, the inlet of which is connected to the outlet of the lubrication oil tank, and the outlet of which is connected to the inlet of the lubrication pump; and / or a safety valve, the inlet of which is connected to the outlet of the lubrication pump, and the outlet of which is connected to the inlet of the lubrication oil tank.

[0018] According to a second aspect of the present invention, a fracturing apparatus is provided, comprising the aforementioned oil-driven system.

[0019] According to a third aspect of the present invention, a driving method is provided, applicable to the above-described hydraulic drive system. The driving method includes: controlling an auxiliary oil replenishing pump of a hydraulic module to draw oil from a hydraulic oil tank and replenishing oil to a hydraulic pump via a variable displacement motor; controlling the variable displacement motor to drive a lubrication pump of a lubrication module to operate to draw oil from a lubrication oil tank and deliver oil to lubrication components; wherein the driving power of the variable displacement motor on the lubrication pump is controlled by controlling the displacement of the variable displacement motor.

[0020] Applying the technical solution of this invention, the hydraulic drive system of this invention includes: a hydraulic module, comprising a hydraulic oil tank, an auxiliary replenishing pump, a variable displacement motor, a hydraulic pump, and a fan motor; the inlet of the auxiliary replenishing pump is connected to the outlet of the hydraulic oil tank, the outlet of the auxiliary replenishing pump is connected to the inlet of the variable displacement motor, the outlet of the variable displacement motor is connected to the first inlet of the hydraulic pump, the first outlet of the hydraulic pump is connected to the inlet of the hydraulic oil tank, and the second outlet and second inlet of the hydraulic pump are respectively connected to the inlet and outlet of the fan motor, the fan motor being used for driving connection with fan blades; a lubrication module, comprising a lubrication oil tank and a lubrication pump; the inlet of the lubrication pump is connected to the outlet of the lubrication oil tank, and the outlet of the lubrication pump is connected to the inlet of the lubrication component; wherein, the variable displacement motor is drivingly connected to the lubrication pump. Thus, the hydraulic drive system of this invention is applicable to vehicle-mounted oilfield fracturing equipment. The pressure of the auxiliary replenishing pump of the hydraulic module comes from a power source such as a gearbox or engine. The power source drives the auxiliary replenishing pump to operate, so that the auxiliary replenishing pump can draw hydraulic oil from the hydraulic oil tank through its own suction and discharge characteristics to provide pressure oil power for the variable motor, thereby realizing the continuous operation of the variable motor. During this process, the hydraulic oil output by the variable motor is recycled to continuously replenish the hydraulic pump, so as to compensate for the hydraulic oil loss in the hydraulic pump and the fan drive pipeline where the fan motor is located. At the same time, the variable motor also provides a variable drive power source for the lubrication pump of the lubrication module. It can automatically change according to the pressure set by the variable motor itself and the load of the lubrication pump to adapt to the actual power demand of the lubrication pump, which greatly saves power loss. It solves the problem that the oil suction capacity of the gear pump of the lubrication oil in the existing fracturing truck is easily affected by temperature, completely eliminates the hidden danger of poor oil suction caused by the limited oil suction height of the lubrication pump itself, and saves the cost required to set up a separate auxiliary replenishing pump system. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0022] Figure 1 A schematic diagram of an embodiment of the oil-driven system according to the present invention is shown;

[0023] Figure 2 It shows Figure 1 A simplified diagram of the hydraulic drive system is shown below;

[0024] Figure 3 It shows the applicability Figure 1 The flowchart shows the driving method of the oil-driven system.

[0025] The above figures include the following reference numerals:

[0026] 01. Hydraulic oil tank; 02. Hydraulic suction filter; 03. Auxiliary replenishing pump; 04. First relief valve; 05. Pressure gauge; 06. Variable displacement motor; 07. Hydraulic pump; 08. Fan motor; 09. First check valve; 10. Accumulator; 11. Second relief valve; 12. Hydraulic oil cooler; 13. Hydraulic return oil filter; 14. Lubrication suction filter; 15. Lubrication pump; 16. Pipeline filter; 17. Safety valve; 18. Thermostat; 19. Second check valve; 20. Lubrication oil cooler; 21. Lubrication components; 22. Lubrication oil tank; 23. Fan blades. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] like Figure 1 and Figure 2 As shown, the present invention provides an oil-driven system, comprising: a hydraulic module including a hydraulic oil tank 01, an auxiliary replenishing pump 03, a variable displacement motor 06, a hydraulic pump 07, and a fan motor 08; the inlet of the auxiliary replenishing pump 03 is connected to the outlet of the hydraulic oil tank 01, the outlet of the auxiliary replenishing pump 03 is connected to the inlet of the variable displacement motor 06, the outlet of the variable displacement motor 06 is connected to the first inlet of the hydraulic pump 07, the first outlet of the hydraulic pump 07 is connected to the inlet of the hydraulic oil tank 01, and the second outlet and second inlet of the hydraulic pump 07 are respectively connected to the inlet and outlet of the fan motor 08, the fan motor 08 being used for driving connection with fan blades 23; and a lubrication module including a lubrication oil tank 22 and a lubrication pump 15; the inlet of the lubrication pump 15 is connected to the outlet of the lubrication oil tank 22, and the outlet of the lubrication pump 15 is connected to the inlet of the lubrication component 21; wherein, the variable displacement motor 06 is drivingly connected to the lubrication pump 15.

[0029] Thus, the hydraulic drive system of the present invention is applicable to vehicle-mounted oilfield fracturing equipment. The pressure force of the auxiliary oil replenishing pump 03 of the hydraulic module comes from a power source such as a gearbox or engine. The power source drives the auxiliary oil replenishing pump 03 to operate, so that the auxiliary oil replenishing pump 03 draws hydraulic oil from the hydraulic oil tank 01 through its own suction and discharge characteristics to provide pressure oil power for the variable motor 06, thereby realizing the continuous operation of the variable motor 06. During this process, the hydraulic oil output by the variable motor 06 is recycled to continuously replenish the hydraulic pump 07, so as to compensate for the oil shortage in the fan drive pipeline where the hydraulic pump 07 and the fan motor 08 are located. The variable motor 06 also provides a variable driving power source for the lubrication pump 15 of the lubrication module. It can automatically change according to the pressure set by the variable motor 06 itself and the load of driving the lubrication pump 15 to adapt to the actual power demand of the lubrication pump 15, which greatly saves power loss. It solves the problem that the oil suction capacity of the gear pump of the fracturing truck is easily affected by temperature in the prior art, completely eliminates the hidden danger of poor oil suction caused by the limited oil suction height of the lubrication pump 15 itself, and saves the cost required to set up a separate auxiliary oil replenishment pump system.

[0030] Specifically, the auxiliary oil pump 03 and the lubrication pump 15 are both gear pumps, and the fan drive pipeline includes a high-pressure pipeline located between the second outlet of the hydraulic pump 07 and the inlet of the fan motor 08, and a low-pressure pipeline located between the inlet of the fan motor 08 and the second inlet of the hydraulic pump 07.

[0031] like Figure 1 and Figure 2 As shown, the hydraulic module also includes: a first relief valve 04, the inlet of which is connected to the outlet of the auxiliary oil pump 03, and the outlet of which is connected to the first inlet of the hydraulic pump 07; and a pressure gauge 05, which is installed on the connecting pipeline between the inlet of the first relief valve 04 and the outlet of the auxiliary oil pump 03.

[0032] In this way, the first relief valve 04 is connected in parallel with the variable motor 06, and the pressure gauge 05 is used to detect the pressure of the hydraulic oil flowing out of the outlet of the auxiliary replenishing pump 03. When the pressure exceeds the preset pressure, the first relief valve 04 is opened so that the hydraulic oil flowing out of the outlet of the auxiliary replenishing pump 03 flows directly to the hydraulic pump 07 through the first relief valve 04, thus avoiding damage to the auxiliary replenishing pump 03 and the variable motor 06 due to overpressure operation.

[0033] like Figure 1 and Figure 2 As shown, the hydraulic module includes a first check valve 09, the inlet of which is connected to the outlet of the fan motor 08, and the outlet of which is connected to the inlet of the fan motor 08.

[0034] In the hydraulic drive system, because the driving fan has a relatively large power and high speed, and the equipment at the work site may need to stop suddenly, when the driving component at the work site stops rapidly, the first one-way valve 09 can form a self-circulating loop between the inlet and outlet of the fan motor 08, avoiding the risk of the fan motor 08 being instantly sucked into the air due to inertia and being damaged, thus further ensuring the stability of the hydraulic drive system.

[0035] like Figure 1 and Figure 2 As shown, the hydraulic module includes an accumulator 10, which is connected in series on the connecting pipeline between the outlet of the fan motor 08 and the second inlet of the hydraulic pump 07 to eliminate fluctuations in hydraulic pressure in the hydraulic drive system and prevent the hydraulic drive system from malfunctioning due to unstable or fluctuating hydraulic pressure.

[0036] like Figure 1 and Figure 2 As shown, the hydraulic module includes a second relief valve 11. The inlet of the second relief valve 11 is connected to the connecting pipeline between the outlet of the fan motor 08 and the second inlet of the hydraulic pump 07. The outlet of the second relief valve 11 is connected to the housing inlet of the fan motor 08 and the housing inlet of the hydraulic pump 07. This is used to flush and cool the core components, the fan motor 08 and the hydraulic pump 07, when the fan motor 08 of the hydraulic module is operating at high pressure and high speed, thereby preventing problems caused by overheating of the fan motor 08 and the hydraulic pump 07.

[0037] like Figure 1 As shown, the hydraulic module includes: a hydraulic suction filter 02, the inlet of which is connected to the outlet of the hydraulic oil tank 01, and the outlet of which is connected to the inlet of the auxiliary replenishing pump 03, for filtering the hydraulic oil before it enters the auxiliary replenishing pump 03; and a hydraulic return filter 13, the inlet of which is connected to the first outlet of the hydraulic pump 07, and the outlet of which is connected to the inlet of the hydraulic oil tank 01, for filtering the hydraulic oil before it enters the hydraulic oil tank 01.

[0038] like Figure 1 As shown, the hydraulic module includes a hydraulic oil cooler 12, which is installed on the pipeline between the first outlet of the hydraulic pump 07 and the inlet of the hydraulic return oil filter 13, in order to continuously maintain the temperature of the hydraulic oil entering the hydraulic oil tank 01 within an optimal range, so that the components of the hydraulic module can work better.

[0039] like Figure 1 and Figure 2As shown, the lubrication module includes a pipeline filter 16, which is installed on the pipeline between the outlet of the lubrication pump 15 and the inlet of the lubrication component 21 to filter impurities in the oil in the pipeline and better maintain the cleanliness of the oil in the oil-driven system.

[0040] like Figure 1 and Figure 2 As shown, the lubrication module includes: a thermostat 18, which is disposed on the connecting pipeline between the outlet of the pipeline filter 16 and the inlet of the lubrication component 21, with the inlet of the thermostat 18 connected to the outlet of the pipeline filter 16 and the first outlet of the thermostat 18 connected to the inlet of the lubrication component 21; and a lubricating oil radiator 20, with the inlet of the lubricating oil radiator 20 connected to the second outlet of the thermostat 18 and the outlet of the lubricating oil radiator 20 connected to the inlet of the lubrication component 21.

[0041] Specifically, when the thermostat 18 determines that the temperature of the lubricating oil is less than or equal to the preset temperature value, it controls its inlet to connect with the first outlet so that the lubricating oil can directly enter the lubrication component 21; when the thermostat 18 determines that the temperature of the lubricating oil is greater than the preset temperature value, it controls its inlet to connect with the second outlet so that the lubricating oil first enters the lubricating oil radiator 20 for heat dissipation before flowing into the lubrication component 21.

[0042] In this way, the thermostat 18 and the lubricating oil cooler 20 can maintain the temperature of the lubricating oil entering the lubrication component 21 (i.e., the plunger pump) within an optimal range, thereby enabling the plunger pump to better drive the corresponding components to work.

[0043] like Figure 1 and Figure 2 As shown, the lubrication module includes a second check valve 19, the inlet of which is connected to the second outlet of the thermostat 18, and the outlet of the lubricating oil radiator 20 is connected to the inlet of the lubrication component 21, so that when the lubricating oil radiator 20 fails, the lubricating oil flowing out from the second outlet of the thermostat 18 can flow into the lubrication component 21 through the second check valve 19.

[0044] like Figure 1 and Figure 2 As shown, the lubrication module includes: a lubrication suction filter 14, the inlet of which is connected to the outlet of the lubrication oil tank 22, and the outlet of which is connected to the inlet of the lubrication pump 15; and / or a safety valve 17, the inlet of which is connected to the outlet of the lubrication pump 15, and the outlet of which is connected to the inlet of the lubrication oil tank 22.

[0045] The safety valve 17 of this invention ensures that the lubrication pump 15 will not be damaged due to excessive pressure or resistance, providing a secondary protection function for the oil-driven system.

[0046] The present invention provides a fracturing device, including the above-described oil-driven system.

[0047] like Figure 3 As shown, the present invention also provides a driving method applicable to the above-mentioned hydraulic drive system. The driving method includes: controlling the auxiliary oil replenishing pump 03 of the hydraulic module to draw oil from the hydraulic oil tank 01 and replenishing oil to the hydraulic pump 07 through the variable motor 06; controlling the variable motor 06 to drive the lubrication pump 15 of the lubrication module to operate to draw oil from the lubrication oil tank 22 and deliver oil to the lubrication component 21; wherein, the driving power of the variable motor 06 on the lubrication pump 15 is controlled by controlling the displacement of the variable motor 06.

[0048] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0049] The hydraulic drive system of the present invention includes: a hydraulic module, comprising a hydraulic oil tank 01, an auxiliary replenishing pump 03, a variable displacement motor 06, a hydraulic pump 07, and a fan motor 08. The inlet of the auxiliary replenishing pump 03 is connected to the outlet of the hydraulic oil tank 01, the outlet of the auxiliary replenishing pump 03 is connected to the inlet of the variable displacement motor 06, the outlet of the variable displacement motor 06 is connected to the first inlet of the hydraulic pump 07, the first outlet of the hydraulic pump 07 is connected to the inlet of the hydraulic oil tank 01, and the second outlet and second inlet of the hydraulic pump 07 are respectively connected to the inlet and outlet of the fan motor 08. The fan motor 08 is used for driving connection with fan blades 23. A lubrication module includes a lubrication oil tank 22 and a lubrication pump 15. The inlet of the lubrication pump 15 is connected to the outlet of the lubrication oil tank 22, and the outlet of the lubrication pump 15 is connected to the inlet of the lubrication component 21. The variable displacement motor 06 is driven connection with the lubrication pump 15. Thus, the hydraulic drive system of the present invention is applicable to vehicle-mounted oilfield fracturing equipment. The pressure force of the auxiliary oil replenishing pump 03 of the hydraulic module comes from a power source such as a gearbox or engine. The power source drives the auxiliary oil replenishing pump 03 to operate, so that the auxiliary oil replenishing pump 03 draws hydraulic oil from the hydraulic oil tank 01 through its own suction and discharge characteristics to provide pressure oil power for the variable motor 06, thereby realizing the continuous operation of the variable motor 06. During this process, the hydraulic oil output by the variable motor 06 is recycled to continuously replenish the hydraulic pump 07, so as to compensate for the oil shortage in the fan drive pipeline where the hydraulic pump 07 and the fan motor 08 are located. The variable motor 06 also provides a variable driving power source for the lubrication pump 15 of the lubrication module. It can automatically change according to the pressure set by the variable motor 06 itself and the load of driving the lubrication pump 15 to adapt to the actual power demand of the lubrication pump 15, which greatly saves power loss. It solves the problem that the oil suction capacity of the gear pump of the fracturing truck is easily affected by temperature in the prior art, completely eliminates the hidden danger of poor oil suction caused by the limited oil suction height of the lubrication pump 15 itself, and saves the cost required to set up a separate auxiliary oil replenishment pump system.

[0050] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0051] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0052] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0053] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0054] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A hydraulically driven system, characterized in that, include: The hydraulic module includes a hydraulic tank (01), an auxiliary replenishing pump (03), a variable displacement motor (06), a hydraulic pump (07), and a fan motor (08). The inlet of the auxiliary replenishing pump (03) is connected to the outlet of the hydraulic tank (01), the outlet of the auxiliary replenishing pump (03) is connected to the inlet of the variable displacement motor (06), the outlet of the variable displacement motor (06) is connected to the first inlet of the hydraulic pump (07), the first outlet of the hydraulic pump (07) is connected to the inlet of the hydraulic tank (01), and the second outlet and second inlet of the hydraulic pump (07) are respectively connected to the inlet and outlet of the fan motor (08). The fan motor (08) is used to drive the fan blades (23). The lubrication module includes a lubricating oil tank (22) and a lubrication pump (15), the inlet of which is connected to the outlet of the lubricating oil tank (22), and the outlet of which is connected to the inlet of the lubrication component (21). The variable motor (06) is driven by the lubrication pump (15).

2. The hydraulic drive system according to claim 1, characterized in that, The hydraulic module also includes: The first relief valve (04) has its inlet connected to the outlet of the auxiliary oil pump (03), and its outlet is connected to the first inlet of the hydraulic pump (07). Pressure gauge (05) is installed on the connecting pipeline between the inlet of the first overflow valve (04) and the outlet of the auxiliary oil pump (03).

3. The hydraulic drive system according to claim 1, characterized in that, The hydraulic module includes a first check valve (09), the inlet of which is connected to the outlet of the fan motor (08), and the outlet of which is connected to the inlet of the fan motor (08).

4. The hydraulic drive system according to claim 1, characterized in that, The hydraulic module includes an accumulator (10) which is disposed on a connecting pipeline between the outlet of the fan motor (08) and the second inlet of the hydraulic pump (07).

5. The hydraulic drive system according to claim 1, characterized in that, The hydraulic module includes a second relief valve (11), the inlet of which is connected to the connecting pipeline between the outlet of the fan motor (08) and the second inlet of the hydraulic pump (07), and the outlet of the second relief valve (11) is connected to the housing inlet of the fan motor (08) and the housing inlet of the hydraulic pump (07).

6. The hydraulic drive system according to claim 1, characterized in that, The hydraulic module includes: A hydraulic suction filter (02) is provided, the inlet of which is connected to the outlet of the hydraulic oil tank (01), and the outlet of which is connected to the inlet of the auxiliary oil replenishment pump (03). A hydraulic return oil filter (13) is provided, the inlet of which is connected to the first outlet of the hydraulic pump (07), and the outlet of which is connected to the inlet of the hydraulic oil tank (01).

7. The hydraulic drive system according to claim 6, characterized in that, The hydraulic module includes a hydraulic oil radiator (12), which is disposed on the pipeline between the first outlet of the hydraulic pump (07) and the inlet of the hydraulic return oil filter (13).

8. The hydraulic drive system according to claim 1, characterized in that, The lubrication module includes a pipeline filter (16) disposed between the outlet of the lubrication pump (15) and the inlet of the lubrication component (21).

9. The hydraulic drive system according to claim 8, characterized in that, The lubrication module includes: Thermostat (18) is provided on the connecting pipe between the outlet of the pipeline filter (16) and the inlet of the lubrication component (21). The inlet of the thermostat (18) is connected to the outlet of the pipeline filter (16), and the first outlet of the thermostat (18) is connected to the inlet of the lubrication component (21). The lubricating oil radiator (20) has its inlet connected to the second outlet of the thermostat (18), and its outlet connected to the inlet of the lubrication component (21).

10. The hydraulic drive system according to claim 9, characterized in that, The lubrication module includes a second check valve (19), the inlet of which is connected to the second outlet of the thermostat (18), and the outlet of which is connected to the inlet of the lubrication component (21).

11. The hydraulic drive system according to claim 1, characterized in that, The lubrication module includes: A lubrication suction filter (14), the inlet of which is connected to the outlet of the lubrication oil tank (22), and the outlet of which is connected to the inlet of the lubrication pump (15); and / or Safety valve (17), the inlet of which is connected to the outlet of the lubrication pump (15), and the outlet of which is connected to the inlet of the lubricating oil tank (22).

12. A fracturing device, characterized in that, The system includes the hydraulic drive system according to any one of claims 1 to 11.

13. A driving method, characterized in that, The hydraulic drive system applicable to any one of claims 1 to 11, the drive method comprising: The auxiliary oil pump (03) of the hydraulic module draws oil from the hydraulic oil tank (01) and replenishes oil to the hydraulic pump (07) through the variable motor (06); The variable motor (06) is controlled to drive the lubrication pump (15) of the lubrication module to operate, so as to draw oil from the lubrication tank (22) and deliver oil to the lubrication component (21); The driving power of the variable motor (06) on the lubrication pump (15) is controlled by controlling the displacement of the variable motor (06).

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