Hydraulic system of a construction equipment, construction equipment and method of use

Abstract

The embodiment of the present application provides a hydraulic system of engineering equipment, engineering equipment and a use method, and relates to the field of engineering machinery, and aims to solve the problem that the battery of engineering equipment is easily damaged due to power shortage. The hydraulic system comprises a hydraulic pump (1301), a hydraulic motor (1302) and a lubricating pump (1303); the hydraulic pump (1301) is suitable for providing pressure liquid to the hydraulic motor (1302); the hydraulic motor (1302) is suitable for providing driving force to the lubricating pump (1303); and the lubricating pump (1303) is suitable for providing lubricating medium to a device included in the engineering equipment and needing lubrication. The present application is used for lubricating the device needing lubrication.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of construction machinery, and in particular to a hydraulic system of a construction equipment, the construction equipment and a use method. BACKGROUND

[0002] In the construction equipment, it is often required to provide lubricating medium to some devices which need to be lubricated. In the related art, a battery of the construction equipment is generally used to provide electric energy for an electric motor, so as to drive the lubricating pump to work by the electric motor, and then provide the lubricating medium to the devices which need to be lubricated by the lubricating pump. The electric motor which drives the lubricating pump to work has a large power, and is easy to cause the battery to be out of power, so as to cause the battery to be damaged due to the out of power. SUMMARY

[0003] The hydraulic system of the construction equipment, the construction equipment and the use method provided by the embodiments of the present application solve the problem that the battery of the construction equipment is easy to be damaged due to the out of power.

[0004] In a first aspect, the embodiments of the present application provide a hydraulic system of a construction equipment.

[0005] The hydraulic system provided by the embodiments of the present application comprises a hydraulic pump, a hydraulic motor and a lubricating pump; the hydraulic pump is suitable for providing pressure liquid to the hydraulic motor, the hydraulic motor is suitable for providing driving force to the lubricating pump, and the lubricating pump is suitable for providing lubricating medium to devices which need to be lubricated included in the construction equipment.

[0006] Optionally, the hydraulic pump is suitable for being power-connected with a power device included in the construction equipment.

[0007] Optionally, the hydraulic system further comprises a hydraulic starting motor, the hydraulic pump is suitable for providing pressure liquid to the hydraulic starting motor, and the hydraulic starting motor is suitable for providing starting driving force to an engine included in the construction equipment.

[0008] Optionally, the hydraulic system further comprises a reversing valve; the hydraulic starting motor comprises a first sub-hydraulic starting motor and a second sub-hydraulic starting motor; the reversing valve has a first working state, a second working state and a third working state; when the reversing valve is in the second working state, the hydraulic pump provides pressure liquid to the hydraulic motor through the reversing valve; when the reversing valve is in the first working state, the hydraulic pump provides pressure liquid to the first sub-hydraulic starting motor through the reversing valve; and when the reversing valve is in the third working state, the hydraulic pump provides pressure liquid to the second sub-hydraulic starting motor through the reversing valve.

[0009] Optionally, the reversing valve has an oil inlet connected with the outlet of the hydraulic pump and an oil return connected with the inlet of the hydraulic motor, and the oil inlet and the oil return are connected when the reversing valve is in the second working state.

[0010] Optionally, the hydraulic system further comprises a constant pressure difference valve arranged at the oil inlet.

[0011] Optionally, the reversing valve has a first working oil outlet connected with the oil inlet of the first sub-hydraulic starting motor and a second working oil outlet connected with the oil inlet of the second sub-hydraulic starting motor.

[0012] Optionally, the hydraulic system further comprises an oil tank, a first overflow valve and a second overflow valve, the inlet of the first overflow valve is connected with the outlet of the hydraulic pump, the inlets of the second overflow valve are respectively connected with the outlet of the first overflow valve and the inlet of the hydraulic motor, and the outlet of the second overflow valve is connected with the oil tank.

[0013] In a second aspect, an embodiment of the present application provides an engineering equipment.

[0014] The engineering equipment provided by the embodiment of the present application comprises a device requiring lubrication and the hydraulic system of any one of the engineering equipment provided in the first aspect, the device requiring lubrication comprises a lubricating oil injection inlet, the lubricating pump comprises a lubricating liquid outlet, and the lubricating liquid outlet is connected with the lubricating oil injection inlet.

[0015] Optionally, the engineering equipment further comprises a chassis vehicle, the device requiring lubrication and the hydraulic system are arranged on the chassis vehicle respectively, and the chassis vehicle comprises a traveling engine, and the traveling engine is power-connected with the hydraulic pump.

[0016] Optionally, the engineering equipment is a fracturing vehicle, the device requiring lubrication comprises a fracturing engine, and the engineering equipment further comprises a fracturing pump, and the fracturing engine is power-connected with the fracturing pump.

[0017] In a third aspect, an embodiment of the present application provides a use method of an engineering equipment.

[0018] The method for using the engineering equipment provided in the embodiments of the present application is applied to any one of the engineering equipment provided in the second aspect, and the method for using the engineering equipment provided in the embodiments of the present application comprises the following steps: starting the hydraulic pump, providing the hydraulic motor with pressure liquid by the hydraulic pump, and enabling the hydraulic motor to output driving force under the action of the pressure liquid; providing the lubricating pump with driving force by the hydraulic motor, and enabling the lubricating pump to pressurize the lubricating medium; and delivering the pressurized lubricating medium to the device that needs to be lubricated by the lubricating pump.

[0019] The above at least one technical solution adopted in the embodiments of the present application can achieve the following beneficial effects:

[0020] In the embodiments of the present application, the hydraulic motor can output driving force by providing the hydraulic motor with pressure liquid by the hydraulic pump, the lubricating pump can be provided with driving force by the hydraulic motor, the lubricating medium can be pressurized by the lubricating pump, and the lubricating medium can be provided to the device that needs to be lubricated by the lubricating pump, so that the device that needs to be lubricated is lubricated. In this way, compared with directly driving the lubricating pump by the electric motor, the problem that the storage battery is easily damaged due to power loss can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creating labor intensity.

[0022] Figure 1 A schematic diagram of a hydraulic system of an engineering equipment provided in the embodiments of the present application;

[0023] Figure 2 A flowchart of a method for using an engineering equipment provided in the embodiments of the present application.

[0024] Legend of reference numerals: 100 - hydraulic system; 110 - oil tank; 120 - filter; 1301 - hydraulic pump; 1302 - hydraulic motor; 1303 - lubricating pump; 1304 - hydraulic starting motor; 13041 - first sub-hydraulic starting motor; 13042 - second sub-hydraulic starting motor; 140 - reversing valve; 1401 - oil inlet; 1402 - oil return port; 1403 - first working oil port; 1404 - second working oil port; 1405 - overflow port; 1501 - first overflow valve; 1502 - second overflow valve; 160 - pressure gauge; 200 - power device; 300 - device that needs to be lubricated. DETAILED DESCRIPTION

[0025] In order to make the technical solutions in the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0026] The technical solutions provided by the embodiments of the present application will be described in detail below in conjunction with the drawings.

[0027] The embodiments of the present application provide a hydraulic system of an engineering equipment. With reference to Figure 1 The hydraulic system 100 provided by the embodiments of the present application can include a hydraulic pump 1301, a hydraulic motor 1302 and a lubricating pump 1303. The hydraulic pump 1301 can be used to provide pressure liquid to the hydraulic motor 1302, the hydraulic motor 1302 can be used to provide driving force to the lubricating pump 1303, and the lubricating pump 1303 can be used to provide lubricating medium to the device 300 to be lubricated included in the engineering equipment.

[0028] In this way, in the embodiments of the present application, the hydraulic motor 1302 can output driving force by providing pressure liquid to the hydraulic motor 1302 by the hydraulic pump 1301, the lubricating pump 1303 can be driven by the hydraulic motor 1302, and the lubricating medium can be pressurized by the lubricating pump 1303 to provide the lubricating medium to the device 300 to be lubricated by the lubricating pump 1303, so as to lubricate the device 300 to be lubricated. In this way, compared with directly driving the lubricating pump 1303 by the motor, the problem that the battery is easily damaged due to power shortage can be improved.

[0029] Exemplarily, in the embodiments of the present application, the hydraulic pump element of the engineering equipment can be used as the hydraulic pump 1301 of the hydraulic system, so that the lubricating pump 1303 can be directly driven by the motor. Exemplarily, in the embodiments of the present application, the traveling engine of the engineering equipment can be used to drive the hydraulic pump 1301 to work, so that the hydraulic pump 1301 can provide pressure liquid to the hydraulic motor 1302. Here, other implementation schemes are not listed one by one.

[0030] Optionally, in the embodiments of the present application, the hydraulic pump 1301 can be used to be power-connected with the power device 200 included in the engineering equipment. In this way, the driving force can be provided to the hydraulic pump 1301 by the power device 200 included in the engineering equipment. Exemplarily, the power device 200 can be a traveling engine, wherein the traveling engine is an engine that can be used to provide power for the traveling structure of the engineering equipment.

[0031] Optionally, in the embodiments of the present application, the hydraulic system 100 can further comprise a hydraulic starting motor 1304. The hydraulic pump 1301 can be used to provide pressure fluid to the hydraulic starting motor 1304, and the hydraulic starting motor 1304 can be used to provide starting driving force to the engine included in the engineering equipment. In this way, in the embodiments of the present application, the hydraulic starting motor 1304 can be used to provide starting driving force to the engine, and the conventional starting motor used to start the engine can be omitted. In this way, the application range of the hydraulic system 100 provided by the embodiments of the present application can be expanded.

[0032] Optionally, in the embodiments of the present application, the hydraulic system 100 can further comprise a reversing valve 140. The hydraulic starting motor 1304 can comprise a first sub-hydraulic starting motor 13041 and a second sub-hydraulic starting motor 13042. The reversing valve 140 can have a first working state, a second working state and a third working state. When the reversing valve 140 is in the second working state, the hydraulic pump 1301 can provide pressure fluid to the hydraulic motor 1302 through the reversing valve 140. When the reversing valve 140 is in the first working state, the hydraulic pump 1301 can provide pressure fluid to the first sub-hydraulic starting motor 13041 through the reversing valve 140. When the reversing valve 140 is in the third working state, the hydraulic pump 1301 can provide pressure fluid to the second sub-hydraulic starting motor 13042 through the reversing valve 140.

[0033] In this way, when the reversing valve 140 is in the second working state, the pressure fluid pressurized by the hydraulic pump 1301 can be delivered to the hydraulic motor 1302, and the hydraulic motor 1302 can be used to drive the lubricating pump 1303 to work. When the reversing valve 140 is in the first working state or the third working state, the pressure fluid pressurized by the hydraulic pump 1301 can be delivered to the first sub-hydraulic starting motor 13041 or the second sub-hydraulic starting motor 13042, and the first sub-hydraulic starting motor 13041 or the second sub-hydraulic starting motor 13042 can be used to provide starting driving force to the engine.

[0034] It should be noted that, by way of example, the device 300 to be lubricated can be an engine, for example, when the engineering equipment is a fracturing pump truck, the device 300 to be lubricated can be a fracturing engine; the reversing valve 140 can be caused to be in the second working state to first pre-lubricate the fracturing engine, and after the pre-lubrication is completed, the reversing valve 140 can be caused to be in the first working state, and the first sub-hydraulic starting motor 13041 can be used to provide starting driving force to the fracturing engine. In this way, the engine can be started after the pre-lubrication of the engine is completed, and the service life of the engine can be improved. In addition, the first sub-hydraulic starting motor 13041 or the second sub-hydraulic starting motor 13042 can back up each other, and when one of them fails, the other one can be started.

[0035] Optionally, in the embodiment of the present application, the reversing valve 140 can have an oil inlet 1401 and an oil return 1402. It should be noted that in the hydraulic field, the oil inlet 1401 can be referred to as a P port, and the oil return 1402 can be referred to as a T port. The oil inlet 1401 can be connected to the outlet of the hydraulic pump 1301, and the oil return 1402 can be connected to the inlet of the hydraulic motor 1302. When the reversing valve 140 is in the second working state, the oil inlet 1401 and the oil return 1402 are connected. In this way, when the reversing valve 140 is in the second working state, the pressure liquid generated by the hydraulic pump 1301 can enter the hydraulic motor 1302 through the oil inlet 1401 and the oil return 1402, thereby driving the hydraulic motor 1302 to work.

[0036] Optionally, in the embodiment of the present application, the hydraulic system 100 can further include a constant pressure difference valve, which can be arranged at the oil inlet 1401. In this way, the pressure stability of the pressure liquid in the oil circuit can be improved.

[0037] Optionally, in the embodiment of the present application, the reversing valve 140 can have a first working oil port 1403 and a second working oil port 1404. It should be noted that in the hydraulic field, the first working oil port 1403 can be referred to as an A port, and the second working oil port 1404 can be referred to as a B port. The first working oil port 1403 can be connected to the oil inlet 1401 of the first sub-hydraulic starting motor 13041, and the second working oil port 1404 can be connected to the oil inlet 1401 of the second sub-hydraulic starting motor 13042.

[0038] Optionally, in the embodiment of the present application, the hydraulic system 100 can further include an oil tank 110, a first overflow valve 1501, and a second overflow valve 1502. The inlet of the first overflow valve 1501 is connected to the outlet of the hydraulic pump 1301, the inlet of the second overflow valve 1502 is connected to the outlet of the first overflow valve 1501 and the inlet of the hydraulic motor 1302, respectively, and the outlet of the second overflow valve 1502 is connected to the oil tank 110. Exemplarily, the overflow action pressure of the first overflow valve 1501 can be greater than the overflow action pressure of the second overflow valve 1502. In this way, the outlet pressure of the hydraulic pump 1301 can be limited by the first overflow valve 1501, and the inlet pressure of the hydraulic motor 1302 can be limited by the second overflow valve 1502.

[0039] Optionally, in the embodiment of the present application, the reversing valve 140 can further have an overflow port 1405. It should be noted that in the hydraulic field, the overflow port 1405 of the reversing valve 140 can be referred to as a Y port. The overflow port 1405 of the reversing valve 140 can be connected to the oil tank 110, so that the pressure liquid overflowing from the reversing valve 140 can flow back into the oil tank 110.

[0040] Optionally, in the embodiment of the present application, the hydraulic system 100 can further comprise a filter 120, which can be arranged between the oil tank 110 and the hydraulic pump 1301, so that the filter 120 can be used to filter the liquid entering the hydraulic pump 1301.

[0041] It should be noted that, for example, in the embodiment of the present application, the liquid in the oil tank 110 can be hydraulic oil. Of course, with the progress of technology, other new hydraulic media will appear, and the liquid in the oil tank 110 in the embodiment of the present application can also be other hydraulic media.

[0042] Optionally, in the embodiment of the present application, the hydraulic system 100 can further comprise a pressure gauge 160, which can be arranged at the inlet of the first overflow valve 1501, and the pressure gauge 160 can be used to measure the liquid pressure value at the inlet of the first overflow valve 1501.

[0043] In addition, optionally, in the embodiment of the present application, pressure measuring points can be arranged on the oil return pipelines of the hydraulic motor 1302 and the hydraulic starting motor 1304, and pressure measuring points can also be arranged on the oil inlet pipeline and the overflow pipeline of the hydraulic starting motor 1304, respectively.

[0044] In this way, in the embodiment of the present application, the hydraulic motor 1302 can be enabled to output driving force by the hydraulic pump 1301 providing pressure liquid to the hydraulic motor 1302, the lubricating pump 1303 can be used to provide driving force to the hydraulic motor 1302, the lubricating medium can be pressurized by the lubricating pump 1303, and the lubricating medium can be provided to the device 300 to be lubricated by the lubricating pump 1303, so that the device 300 to be lubricated can be lubricated. In this way, compared with directly using an electric motor to drive the lubricating pump 1303, the problem that the storage battery is easily damaged due to power loss can be improved.

[0045] The embodiment of the present application provides an engineering equipment. The engineering equipment provided by the embodiment of the present application can comprise the device 300 to be lubricated and any one of the hydraulic systems 100 provided by the embodiment of the present application, and the device 300 to be lubricated can comprise a lubricating oil injection port, and the lubricating pump 1303 can comprise a lubricating liquid outlet, which can be connected with the lubricating oil injection port.

[0046] Optionally, in the embodiment of the present application, the engineering equipment can further comprise a chassis vehicle, and the device 300 to be lubricated and the hydraulic system 100 can be arranged on the chassis vehicle, respectively, and the chassis vehicle can comprise a traveling engine, and the traveling engine can be in power connection with the hydraulic pump 1301. In this way, the traveling engine can be used to drive the hydraulic pump 1301 to work.

[0047] Optionally, in the embodiment of the application, the engineering equipment can be a fracturing truck, the device requiring lubrication 300 can include a fracturing engine, and the engineering equipment can further include a fracturing pump, and the fracturing engine can be power-connected with the fracturing pump. In this way, the hydraulic system 100 can be used to lubricate the fracturing engine, and after the fracturing engine is normally started, the fracturing engine can be used to drive the fracturing pump to work.

[0048] Optionally, in the embodiment of the application, when the device requiring lubrication 300 is an engine, the engineering equipment can further include an engine oil sump, the lubricating medium can be arranged in the engine oil sump, and the lubricating pump 1303 can be used to suck the lubricating medium from the engine oil sump and pressurize the sucked lubricating medium.

[0049] Optionally, in the embodiment of the application, the engineering equipment can further include a pressure switch, and the pressure switch can be arranged on the lubricating medium pipeline of the device requiring lubrication 300. In this way, when the lubrication is not completed, the pressure switch can be in a first state, for example, the pressure switch can be in a conduction state, and the pressure indicator controlled by the pressure switch can be in a lighted state, so as to remind the operator that the lubrication is not completed and to remind the operator not to start the device requiring lubrication 300 rashly. When the lubrication is completed, the pressure switch can be in a second state, for example, the pressure switch can be in a non-conduction state, and the pressure indicator controlled by the pressure switch can be in an unlighted state.

[0050] Optionally, in the embodiment of the application, the engineering equipment can further include a relay, and the relay can be used in cooperation with the pressure switch. For example, when the pressure switch is in the first state, the relay can be used to lock the starting function of the device requiring lubrication 300, so as to avoid mis-starting. When the pressure switch is in the second state, the relay can release the lock of the starting function of the device requiring lubrication 300.

[0051] In this way, in the embodiment of the application, the hydraulic pump 1301 can be used to provide the pressure liquid to the hydraulic motor 1302, so that the hydraulic motor 1302 can output the driving force. The hydraulic motor 1302 can be used to provide the driving force to the lubricating pump 1303, and the lubricating pump 1303 can be used to pressurize the lubricating medium and provide the lubricating medium to the device requiring lubrication 300, so as to lubricate the device requiring lubrication 300. In this way, compared with directly using the electric motor to drive the lubricating pump 1303, the problem that the storage battery is easily damaged due to power shortage can be improved.

[0052] The embodiment of the present application provides a use method of the engineering equipment. The use method of the engineering equipment provided by the embodiment of the present application can be applied to any one of the engineering equipment provided by the embodiment of the present application. The use method provided by the embodiment of the present application can comprise: step 401, starting the hydraulic pump 1301, providing the pressure liquid to the hydraulic motor 1302 by the hydraulic pump 1301, so that the hydraulic motor 1302 outputs the driving force under the action of the pressure liquid; step 402, providing the driving force to the lubricating pump 1303 by the hydraulic motor 1302, so that the lubricating pump 1303 pressurizes the lubricating medium; step 403, delivering the pressurized lubricating medium to the device 300 to be lubricated by the lubricating pump 1303.

[0053] In addition, the engineering equipment can be a fracturing truck, and the device 300 to be lubricated can comprise a fracturing engine. The use method provided by the embodiment of the present application can comprise:

[0054] Before the power device 200 is started, the connecting pipeline of the first working oil port 1403 of the reversing valve 140 is disassembled, and then the first working oil port 1403 is plugged by using the plug (or other reducing joint) of the same specification. The power device 200 is started, wherein the power device 200 can be a traveling engine, so that the power device 200 reaches the target rotating speed. Then the twist switch of the fracturing engine is turned on, the measured pressure value of the pressure gauge 160 is obtained, the adjusting screw of the first overflow valve 1501 is adjusted, so that the overflow action pressure of the first overflow valve 1501 is the target value. The adjusting screw of the first overflow valve 1501 is locked, and after the power device 200 stops running, the disassembled pipeline is restored.

[0055] The power device 200 is started, so that the power device 200 reaches the target rotating speed, so that the reversing valve 140 is in the second working state, the overflow action pressure of the second overflow valve 1502 is adjusted, the pressure of the lubricating medium is obtained, and after the pressure of the lubricating medium reaches the target value, the second overflow valve 1502 is locked.

[0056] During the lubrication process, the pressure switch can be in the conducting state, the pressure indicating lamp can be in the lighted state, the relay can be used to lock the opening function of the device 300 to be lubricated, and the fracturing engine can be in the state of being unable to start by the relay. When the lubrication pressure reaches the target pressure value, the pressure switch can be in the off state, and the relay can release the lock of the opening function of the device 300 to be lubricated. The starting switch of the fracturing engine can be turned, and the fracturing engine is started.

[0057] In this way, in the embodiment of the present application, the hydraulic motor 1302 can be caused to output a driving force by the hydraulic pump 1301 supplying pressure fluid to the hydraulic motor 1302, the lubrication pump 1303 can be caused to be driven by the hydraulic motor 1302, the lubrication medium can be pressurized by the lubrication pump 1303, and the lubrication medium can be supplied to the device 300 to be lubricated by the lubrication pump 1303, so that the device 300 to be lubricated can be lubricated. Thus, as compared with directly driving the lubrication pump 1303 by the electric motor, the problem that the storage battery is easily damaged due to a shortage of power can be improved.

[0058] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one from another entity or action, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0059] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the embodiments of the present application, and it is intended to cover in the appended claims and their equivalents any and all such changes, modifications, substitutions, and alterations.

Claims

1. An engineering equipment, characterized in that: include: hydraulic systems, fracturing engines and fracturing pumps; The hydraulic system comprises: a hydraulic pump (1301), a hydraulic motor (1302), a lubrication pump (1303), a hydraulic starting motor (1304) and a reversing valve (140); The hydraulic pump (1301) is adapted to provide pressure liquid to the hydraulic motor (1302), the hydraulic motor (1302) is adapted to provide driving force to the lubrication pump (1303), and the lubrication pump (1303) is adapted to provide lubrication medium to the fracturing engine; The hydraulic pump (1301) is adapted to provide pressure liquid to the hydraulic starting motor (1304), and the hydraulic starting motor (1304) is adapted to provide starting driving force to the fracturing engine, and the fracturing engine is connected to the fracturing pump power; The hydraulic starting motor (1304) comprises a first sub-hydraulic starting motor (13041) and a second sub-hydraulic starting motor (13042); The reversing valve (140) has a first working state, a second working state and a third working state; When the reversing valve (140) is in the second working state, the hydraulic pump (1301) provides pressure liquid to the hydraulic motor (1302) via the reversing valve (140); When the reversing valve (140) is in the first working state, the hydraulic pump (1301) provides pressure liquid to the first sub-hydraulic starting motor (13041) via the reversing valve (140); When the reversing valve (140) is in the third working state, the hydraulic pump (1301) provides pressure liquid to the second sub-hydraulic starting motor (13042) via the reversing valve (140); before the fracturing engine is started, the reversing valve (140) is controlled to be in the second working state to pre-lubricate the fracturing engine, and after the pre-lubrication is completed, the reversing valve (140) is controlled to be in the first working state or the third working state to start the fracturing engine.

2. The engineering equipment according to claim 1, characterized in that: The hydraulic pump (1301) is suitable for being power-connected to a power device (200) included in the engineering equipment.

3. The engineering equipment according to claim 1, characterized in that: The reversing valve (140) has an oil inlet (1401) and an oil return port (1402), wherein the oil inlet (1401) is connected to the outlet of the hydraulic pump (1301), and the oil return port (1402) is connected to the inlet of the hydraulic motor (1302). When the reversing valve (140) is in the second working state, the oil inlet (1401) and the oil return port (1402) are connected.

4. The engineering equipment according to claim 3, characterized in that: The hydraulic system further comprises a constant pressure differential valve, which is arranged at the oil inlet (1401).

5. The engineering equipment according to claim 3, characterized in that: The reversing valve (140) has a first working oil port (1403) and a second working oil port (1404), wherein the first working oil port (1403) is connected to the oil inlet (1401) of the first sub-hydraulic starting motor (13041), and the second working oil port (1404) is connected to the oil inlet (1401) of the second sub-hydraulic starting motor (13042).

6. The engineering equipment according to claim 1, characterized in that: The hydraulic system further comprises: an oil tank (110), a first overflow valve (1501) and a second overflow valve (1502), wherein the inlet of the first overflow valve (1501) is connected to the outlet of the hydraulic pump (1301), the inlet of the second overflow valve (1502) is connected to the outlet of the first overflow valve (1501) and the inlet of the hydraulic motor (1302), respectively, and the outlet of the second overflow valve (1502) is connected to the oil tank (110).

7. The engineering equipment according to claim 1, characterized in that: The fracturing engine includes a lubricating oil injection port, the lubricating pump (1303) includes a lubricating liquid outlet, the lubricating liquid outlet is connected to the lubricating oil injection port, and the reversing valve (140) further includes an overflow port (1405), and the overflow port (1405) is connected to the oil tank (110) of the hydraulic system.

8. The engineering equipment according to claim 7, characterized in that: The engineering equipment further comprises a chassis vehicle, the fracturing engine and the hydraulic system are respectively arranged on the chassis vehicle, and the chassis vehicle comprises a traveling engine, which is power-connected to the hydraulic pump (1301).

9. The engineering equipment according to claim 8, characterized in that: The engineering equipment is a fracturing truck.

10. A method for using engineering equipment, applied to the engineering equipment according to any one of claims 1 to 9, characterized in that: The method of use includes: Starting the hydraulic pump (1301), and using the hydraulic pump (1301) to provide pressure liquid to the hydraulic motor (1302), so that the hydraulic motor (1302) outputs driving force under the action of the pressure liquid; Utilizing the hydraulic motor (1302) to provide driving force to the lubrication pump (1303), so that the lubrication pump (1303) pressurizes the lubrication medium; The pressurized lubricating medium is delivered to the fracturing engine by the lubrication pump (1303).

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