Oil supply circuit, oil supply control method and operating machine

Abstract

The present invention provides an oil supply circuit, an oil supply control method and an operating machine. The oil supply circuit comprises: a mud pump motor hydraulic system, an oil supply regulating system and a pressure collection component. The oil supply port of the deviation correction hydraulic control system is connected with the oil inlet port of the mud pump motor hydraulic system. The pressure collection component is arranged on the oil supply pipeline of the deviation correction hydraulic control system. The oil supply regulating system is arranged on the oil return pipeline of the mud pump motor hydraulic system. The pressure collection component is used to collect the oil supply pressure of the deviation correction hydraulic control system. The oil supply regulating system is used to regulate the back pressure of the mud pump motor hydraulic system according to the oil supply pressure. The back pressure of the mud pump motor hydraulic system is used to regulate the oil supply pressure of the deviation correction hydraulic control system within a preset pressure range. The oil supply regulating system dynamically regulates the return oil back pressure of the mud pump motor hydraulic system according to the oil supply pressure, thereby stabilizing the oil supply pressure within the preset pressure range, effectively ensuring the normal operation of the deviation correction hydraulic control system.

Description

Technical Field

[0001] The present invention relates to the technical field of oil supply control, and in particular to an oil supply circuit, an oil supply control method and an operating machine. Background Art

[0002] The double-wheel slot milling machine is a kind of underground continuous wall construction machinery used under special geological and construction conditions. Its core components include a working device equipped with a milling wheel, which is driven by a hydraulic motor to rotate the milling wheel to mill the rock layer downwards, and at the same time, the hydraulic motor drives the mud pump to pump the milled rock material to the ground. The double-wheel milling working device needs to adjust its posture in real time during the continuous wall construction process, including verticality and deflection, to ensure the quality of the slotting of the continuous wall construction. The specific adjustment is achieved by controlling the action of the hydraulic system and hydraulic actuators installed on the working device, that is, the double-wheel milling deviation correction hydraulic control system.

[0003] At present, the oil supply method of most double-wheel milling correction hydraulic control systems is: the pressure oil at the inlet of the milling wheel motor and the mud pump motor is selected as the hydraulic oil of the double-wheel milling correction hydraulic control system.

[0004] However, the hydraulic oil obtained in this way is controlled by the driving pressure generated by the operation of the milling wheel and the mud pump, and the driving pressure changes with the load, resulting in unstable oil supply pressure of the double-wheel milling correction hydraulic control system. Summary of the invention

[0005] The present invention provides an oil supply circuit, an oil supply control method and an operating machine, which are used to solve the defect of unstable oil supply pressure of the correcting hydraulic control system in the prior art, and achieve the goal of stabilizing the oil supply pressure of the correcting hydraulic control system within a preset pressure range by adjusting the return oil back pressure in the mud pump motor hydraulic system, thereby ensuring the normal operation of the correcting hydraulic control system.

[0006] The present invention provides an oil supply circuit for supplying oil to a deviation correction hydraulic control system, the oil supply circuit comprising: a mud pump motor hydraulic system, an oil supply regulating system and a pressure collection component;

[0007] The oil supply port of the deviation correction hydraulic control system is communicated with the oil inlet port of the mud pump motor hydraulic system, the pressure collection component is arranged on the oil supply pipeline of the deviation correction hydraulic control system, and the oil supply adjustment system is arranged on the oil return pipeline of the mud pump motor hydraulic system;

[0008] The pressure collection component is used to collect the oil supply pressure of the correction hydraulic control system, and the oil supply regulation system is used to adjust the back pressure of the mud pump motor hydraulic system according to the oil supply pressure. The back pressure of the mud pump motor hydraulic system is used to adjust the oil supply pressure of the correction hydraulic control system within a preset pressure range.

[0009] According to an oil supply circuit provided by the present invention, the oil supply regulation system includes a control module and a back pressure control valve group;

[0010] The control module is connected to the back pressure control valve group and the pressure collection assembly respectively, and the back pressure control valve group is arranged on the oil return pipeline between the oil tank and the mud pump motor hydraulic system;

[0011] The control module is used to receive the oil supply pressure and control the back pressure control valve group to adjust the back pressure of the mud pump motor hydraulic system according to the oil supply pressure.

[0012] According to an oil supply circuit provided by the present invention, the back pressure control valve group includes a proportional regulating valve;

[0013] The proportional regulating valve is connected to the control module, and the proportional regulating valve is arranged on the oil return pipeline between the oil tank and the mud pump motor hydraulic system, and the proportional regulating valve is used to adjust the back pressure of the mud pump motor hydraulic system.

[0014] According to an oil supply circuit provided by the present invention, the proportional regulating valve comprises a proportional relief valve;

[0015] The proportional relief valve is connected to the control module, and the proportional relief valve is arranged on the oil return pipeline between the oil tank and the mud pump motor hydraulic system, and the proportional relief valve is used to adjust the back pressure of the mud pump motor hydraulic system.

[0016] According to an oil supply circuit provided by the present invention, the oil supply regulating system further includes a one-way valve;

[0017] The one-way valve is arranged between the back pressure control valve group and the oil tank, and the one-way valve is used to prevent the oil in the oil tank from flowing back to the back pressure control valve group.

[0018] An oil supply circuit provided according to the present invention also includes an oil supply safety valve group;

[0019] The oil supply safety valve group is arranged on the oil inlet pipeline of the mud pump motor hydraulic system, and the oil supply safety valve group is used to control the pressure of the mud pump motor hydraulic system to be less than a preset critical value.

[0020] The present invention also provides an oil supply control method, comprising:

[0021] Collecting the oil supply pressure of the deviation correction hydraulic control system, the oil inlet of the deviation correction hydraulic control system is connected with the oil inlet of the mud pump motor hydraulic system;

[0022] Based on the oil supply pressure, the oil supply pressure is controlled within a preset pressure range by adjusting the back pressure of the mud pump motor hydraulic system.

[0023] According to an oil supply control method provided by the present invention, before collecting the oil supply pressure of the deviation correction hydraulic control system, it also includes detecting whether the actuator in the deviation correction hydraulic control system is working;

[0024] If it is detected that the actuator is in a working state, the oil supply pressure of the deviation correction hydraulic control system is collected;

[0025] If it is detected that the actuator is in a non-working state, the back pressure of the mud pump motor hydraulic system is adjusted to be reduced to a minimum, so that the mud pump motor hydraulic system works under the minimum back pressure.

[0026] According to an oil supply control method provided by the present invention, the step of adjusting the back pressure of the hydraulic system of the mud pump motor comprises:

[0027] The back pressure of the mud pump motor hydraulic system is adjusted by a back pressure control valve group, and the back pressure control valve group is arranged on an oil tank and an oil return pipeline of the mud pump motor hydraulic system.

[0028] A fuel supply control method according to the present invention further includes:

[0029] The present invention also provides a working machine, comprising an oil supply circuit as described in any one of the above items, or used to execute an oil supply control method as described in any one of the above items.

[0030] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, any one of the above-mentioned fuel supply control methods is implemented.

[0031] The present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the fuel supply control method as described above is implemented.

[0032] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the fuel supply control method as described above is implemented.

[0033] The present invention provides an oil supply circuit, an oil supply control method and an operating machine, wherein the oil supply circuit comprises: a mud pump motor hydraulic system, an oil supply regulating system and a pressure collection component; the oil supply port of the correction hydraulic control system is connected to the oil inlet port of the mud pump motor hydraulic system, the pressure collection component is arranged on the oil supply pipeline of the correction hydraulic control system, and the oil supply regulating system is arranged on the oil return pipeline of the mud pump motor hydraulic system; the pressure collection component is used to collect the oil supply pressure of the correction hydraulic control system, the oil supply regulating system is used to regulate the back pressure of the mud pump motor hydraulic system according to the oil supply pressure, and the back pressure of the mud pump motor hydraulic system is used to regulate the oil supply pressure of the correction hydraulic control system within a preset pressure range, and the oil supply regulating system dynamically regulates the return oil back pressure of the mud pump motor hydraulic system according to the oil supply pressure, thereby stabilizing the oil supply of the correction hydraulic control system within the preset pressure range, effectively ensuring the normal operation of the correction hydraulic control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a structural schematic diagram of the oil supply circuit provided by the present invention;

[0036] Figure 2 It is a flow chart of the oil supply control method provided by the present invention;

[0037] Figure 3 It is a structural schematic diagram of the electronic device provided by the present invention.

[0038] Reference numerals:

[0039] 1. Mud pump motor; 2. Back pressure control valve group; 3. Pressure collection component; 4. Check valve; 5. Oil supply safety valve group; 6. Hydraulic pipeline; 7. Main pump; A. Correction hydraulic control system. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Combine the following Figure 1-Figure 3An oil supply circuit, an oil supply control method and an operating machine of the present invention are described.

[0042] Figure 1 It is a structural schematic diagram of the oil supply circuit provided by the present invention.

[0043] like Figure 1 As shown, an oil supply circuit provided by an embodiment of the present invention is used to supply oil to a correction hydraulic control system A, and the oil supply circuit includes: a mud pump motor hydraulic system, an oil supply regulating system and a pressure collection component 3; wherein, the oil supply port of the correction hydraulic control system A is connected to the oil inlet of the mud pump motor hydraulic system, the pressure collection component 3 is arranged on the oil supply pipeline of the correction hydraulic control system A, and the oil supply regulating system is arranged on the oil return pipeline of the mud pump motor hydraulic system; the pressure collection component 3 is used to collect the oil supply pressure of the correction hydraulic control system A, and the oil supply regulating system is used to adjust the back pressure of the mud pump motor hydraulic system according to the oil supply pressure, and the back pressure of the mud pump motor hydraulic system is used to adjust the oil supply pressure of the correction hydraulic control system A within a preset pressure range.

[0044] In a specific implementation process, the mud pump motor hydraulic system includes a working device hydraulic module and a ground hydraulic power source, and the working device hydraulic module is connected to the ground hydraulic power source through a hydraulic pipeline 6, that is, located at Figure 1 The upper part of the middle hydraulic pipeline corresponds to the hydraulic module of the working device, and the lower part corresponds to the ground hydraulic power source. The part with the hydraulic oil tank is the corresponding ground hydraulic power source. The hydraulic oil in the ground hydraulic power source tank is pumped to the mud pump motor 1 of the hydraulic module of the working device through the main pump 7, so that the mud pump motor 1 works normally, and the oil supply port of the deviation correction hydraulic control system A is connected with the oil inlet of the mud pump motor 1, that is, the pressure oil of the deviation correction hydraulic control box system is taken from the oil inlet of the mud pump motor 1. Therefore, the change of the load of the mud pump motor 1 will cause the oil supply pressure of the deviation correction hydraulic control system A to change, which will affect the working state of the deviation correction hydraulic control system A. By setting an oil supply regulating system on the ground hydraulic power source of the mud pump motor 1, the oil supply regulating system is used to adjust the back pressure of the mud pump motor 1, so that the oil supply pressure of the deviation correction hydraulic control system A is the superposition of the load pressure difference of the mud pump motor 1 and the return oil back pressure, so that the return oil back pressure can be adjusted to ensure that the oil supply pressure value of the deviation correction hydraulic control system A is stable within the preset pressure range.

[0045] The specific working process is to detect the oil inlet pressure of the correction hydraulic control system A in real time through the pressure collection component 3 set at the oil inlet of the correction hydraulic control system A. When the oil inlet pressure is detected to be within the preset pressure range, the oil supply adjustment system does not work, which indicates that the correction hydraulic control system A is in a normal working state and there is no need to adjust the oil supply pressure. When the load of the mud pump motor 1 changes, the oil inlet pressure of the mud pump motor 1 will change, which will cause the oil supply pressure of the correction hydraulic control system A to change. At this time, in order to ensure the normal operation of the correction hydraulic control system A, it is necessary to adjust the oil supply pressure so that the oil supply pressure is stable within the preset pressure range. The specific adjustment method is to adjust the return oil back pressure of the mud pump motor 1 of the mud pump motor hydraulic system according to the pressure value collected in real time by the pressure collection component 3. Since the oil supply pressure at this time is the superposition of the load pressure difference of the mud pump motor 1 and the return oil back pressure, therefore, when the load pressure difference cannot be adjusted, the oil supply pressure can be adjusted by adjusting the return oil back pressure of the mud pump motor 1. The entire adjustment process can be understood as feedback adjustment, that is, first detecting the oil supply pressure of the deviation correction hydraulic control system A, and then adjusting the back pressure of the mud pump motor 1 according to the size of the oil supply pressure so that the oil supply pressure of the deviation correction hydraulic control system A is stable within the preset pressure range. Among them, the preset pressure range is a set value, which can be flexibly adjusted according to actual conditions. The pressure acquisition component 3 can be a pressure sensor, etc.

[0046] By adjusting the back pressure of the mud pump motor 1, the oil supply pressure of the deviation correction hydraulic control system A can be quickly and accurately adjusted. A closed-loop control is formed by the oil supply adjustment system and the pressure acquisition component 3 to ensure the normal operation of the deviation correction hydraulic control system A and further ensure the normal operation of the operating machinery.

[0047] An oil supply circuit provided in this embodiment includes: a mud pump motor hydraulic system, an oil supply regulating system and a pressure collection component 3; the oil supply port of the correction hydraulic control system A is connected to the oil inlet of the mud pump motor hydraulic system, the pressure collection component 3 is arranged on the oil supply pipeline of the correction hydraulic control system A, and the oil supply regulating system is arranged on the oil return pipeline of the mud pump motor hydraulic system; the pressure collection component 3 is used to collect the oil supply pressure of the correction hydraulic control system A, the oil supply regulating system is used to adjust the back pressure of the mud pump motor hydraulic system according to the oil supply pressure, and the back pressure of the mud pump motor hydraulic system is used to adjust the oil supply pressure of the correction hydraulic control system A within a preset pressure range, and the oil supply regulating system dynamically adjusts the return oil back pressure of the mud pump motor hydraulic system according to the oil supply pressure, thereby stabilizing the oil supply of the correction hydraulic control system A within the preset pressure range, effectively ensuring the normal operation of the correction hydraulic control system A.

[0048] Further, based on the above embodiment, Figure 1As shown, the oil supply regulating system in this embodiment includes a control module and a back pressure control valve group 2; the control module is connected to the back pressure control valve group 2 and the pressure collection component 3 respectively, and the back pressure control valve group 2 is arranged on the oil return pipeline between the oil tank and the mud pump motor hydraulic system; the control module is used to receive the oil supply pressure, and control the back pressure control valve group 2 to adjust the back pressure of the mud pump motor hydraulic system according to the oil supply pressure. Among them, the back pressure control valve group 2 includes a proportional regulating valve; the proportional regulating valve is connected to the control module, and the proportional regulating valve is arranged on the oil return pipeline between the oil tank and the mud pump motor hydraulic system, and the proportional regulating valve is used to adjust the back pressure of the mud pump motor hydraulic system. The proportional regulating valve includes a proportional relief valve; the proportional relief valve is connected to the control module, and the proportional relief valve is arranged on the oil return pipeline between the oil tank and the mud pump motor hydraulic system, and the proportional relief valve is used to adjust the back pressure of the mud pump motor hydraulic system.

[0049] Specifically, the control module can be a vehicle-mounted control system, etc. The main function of the back pressure control valve group 2 is to adjust the back pressure of the mud pump motor 1. The proportional relief valve is used to more accurately control the back pressure of the mud pump motor 1 by using the electric proportional adjustment method. The proportional relief valve is arranged on the return oil pipeline of the mud pump motor 1. The electric proportional adjustment control method improves the automation level of the back pressure control, and realizes automatic control of the overflow pressure of the proportional relief valve according to the real-time oil supply pressure of the correction hydraulic control system A, thereby automatically stabilizing the oil supply pressure within the preset pressure range. In addition, the proportional relief valve is easy to control, and the control method is simple, which can better avoid system failures and ensure the oil supply efficiency of the oil supply circuit.

[0050] Further, based on the above embodiment, Figure 1 As shown, the oil supply regulation system in this embodiment also includes a one-way valve 4; the one-way valve 4 is arranged between the back pressure control valve group 2 and the oil tank, and the one-way valve 4 is used to prevent the oil in the oil tank from flowing back to the back pressure control valve group 2.

[0051] Specifically, by directly connecting the hydraulic oil tank and the back pressure control valve group 2 with a one-way valve 4, it is possible to effectively prevent the hydraulic oil in the hydraulic oil tank from flowing back to the back pressure control valve group 2, thereby improving the maintainability of the equipment.

[0052] Further, based on the above embodiment, Figure 1 As shown, this embodiment also includes an oil supply safety valve group 5; the oil supply safety valve group 5 is arranged on the oil inlet pipeline of the mud pump motor hydraulic system, and the oil supply safety valve group 5 is used to control the pressure of the mud pump motor hydraulic system to be less than a preset critical value.

[0053] Specifically, by arranging the oil supply safety valve group 5 on the oil inlet pipeline of the mud pump motor hydraulic system, when the oil inlet pressure of the oil inlet pipeline is abnormal, the oil supply safety valve group 5 can adjust the oil inlet pressure in time to ensure that the pressure of the mud pump motor hydraulic system is less than the preset critical value, prevent the problem of hydraulic pressure exceeding the standard, and better protect the mud pump motor hydraulic system.

[0054] Based on the same general inventive concept, the present invention also protects an oil supply control method.

[0055] Figure 2 It is a flow chart of the oil supply control method provided by the present invention.

[0056] like Figure 2 As shown, an oil supply control method provided by an embodiment of the present invention, the execution subject may be a vehicle-mounted control system, or a control module of a hydraulic system, etc., mainly comprising the following steps:

[0057] 201. The oil supply pressure of the deviation correction hydraulic control system is collected. The oil inlet of the deviation correction hydraulic control system is connected with the oil inlet of the mud pump motor hydraulic system.

[0058] The pressure oil of the correction hydraulic control system is taken from the oil inlet of the mud pump motor. In order to ensure the normal operation of the correction hydraulic system, it is necessary to ensure that the hydraulic oil of the correction hydraulic control system is normal. Therefore, it is necessary to collect the oil supply pressure of the correction hydraulic control system in real time. The specific collection method is to collect the oil supply pressure through a pressure sensor, and obtain the oil supply pressure at each moment in real time through the pressure sensor. In this way, the oil supply pressure of the mud pump motor under different load conditions can be collected, which is more conducive to accurate subsequent oil supply pressure adjustment.

[0059] 202. Based on the oil supply pressure, the oil supply pressure is controlled within a preset pressure range by adjusting the back pressure of the mud pump motor hydraulic system.

[0060] After the oil supply pressure of the deviation correction hydraulic control system is detected, the back pressure of the mud pump motor can be adjusted. Since the oil supply pressure of the deviation correction hydraulic control system is the superposition of the load pressure difference of the mud pump motor and the return oil back pressure, the oil supply pressure of the deviation correction hydraulic control system is adjusted by dynamically adjusting the back pressure of the mud pump motor. Among them, the correspondence between the back pressure of the mud motor and the oil supply pressure is no longer specifically described in this embodiment. It can be a correspondence between the three established in advance, that is, the correspondence between the mud pump motor load, the back pressure of the mud pump motor and the oil supply pressure of the deviation correction hydraulic control system, so that when the load of the mud pump motor is determined, the oil supply pressure of the deviation correction hydraulic control system can be controlled by adjusting the back pressure of the mud pump motor. Finally, the closed-loop control starting from collecting the oil supply pressure to adjusting the oil supply pressure by using the back pressure control valve group is realized, and the oil supply pressure of the deviation correction hydraulic control system is increased and stabilized within the preset pressure range.

[0061] Further, based on the above embodiment, before collecting the oil supply pressure of the deviation correction hydraulic control system, this embodiment also includes: detecting whether the actuator in the deviation correction hydraulic control system is working; if it is detected that the actuator is in a working state, collecting the oil supply pressure of the deviation correction hydraulic control system; if it is detected that the actuator is in a non-working state, adjusting the back pressure of the mud pump motor hydraulic system to a minimum, so that the mud pump motor hydraulic system works under the minimum back pressure. Among them, adjusting the back pressure of the mud pump motor hydraulic system includes: adjusting the back pressure of the mud pump motor hydraulic system by using a back pressure control valve group, and the back pressure control valve group is set on the oil tank and the oil return pipeline of the mud pump motor hydraulic system.

[0062] Specifically, the oil supply control process is to first detect whether the actuator in the deviation correction hydraulic control system is in a working state. If the actuator is in a non-working state, it means that at this time, there is no need to adjust the oil supply pressure of the deviation correction hydraulic control system. At the same time, it is necessary to control the back pressure control valve group to reduce the back pressure of the mud pump motor to the minimum. At this time, the mud pump motor hydraulic control system can work normally under the minimum back pressure state.

[0063] When it is detected that the actuator in the deviation correction hydraulic control system is in working state, it is necessary to ensure that the oil supply pressure of the deviation correction hydraulic control system is stable. Therefore, the oil supply pressure will be collected for subsequent back pressure adjustment to ensure that the oil supply pressure of the deviation correction hydraulic control system is normal. When it is detected that the actuator in the deviation correction hydraulic control system switches from working state to non-working state, the back pressure control valve group is controlled to adjust the back pressure of the mud pump to the minimum value and return to the initial state, thereby completing the oil supply pressure adjustment of the whole process.

[0064] Based on the same general inventive concept, the present invention also protects an operating machine, including an oil supply circuit as in any of the above embodiments, or, for executing an oil supply control method as in any of the above embodiments, the operating machine including a double-wheel milling machine, etc.

[0065] Figure 3 It is a structural schematic diagram of the electronic device provided by the present invention.

[0066] like Figure 3 As shown, the electronic device may include: a processor 310, a communications interface 320, a memory 330 and a communications bus 340, wherein the processor 310, the communications interface 320 and the memory 330 communicate with each other through the communications bus 340. The processor 310 may call the logic instructions in the memory 330 to execute the oil supply control method, which includes: collecting the oil supply pressure of the deviation correction hydraulic control system, the oil inlet of the deviation correction hydraulic control system is connected to the oil inlet of the mud pump motor hydraulic system; based on the oil supply pressure, by adjusting the back pressure of the mud pump motor hydraulic system, the oil supply pressure is controlled within a preset pressure range.

[0067] In addition, the logic instructions in the above-mentioned memory 330 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0068] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the oil supply control method provided by the above-mentioned methods, which includes: collecting the oil supply pressure of the correction hydraulic control system, the oil inlet of the correction hydraulic control system is connected to the oil inlet of the mud pump motor hydraulic system; based on the oil supply pressure, by adjusting the back pressure of the mud pump motor hydraulic system, the oil supply pressure is controlled within a preset pressure range.

[0069] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it is implemented to execute the oil supply control method provided by the above-mentioned methods, the method comprising: collecting the oil supply pressure of the correction hydraulic control system, the oil inlet of the correction hydraulic control system is connected to the oil inlet of the mud pump motor hydraulic system; based on the oil supply pressure, by adjusting the back pressure of the mud pump motor hydraulic system, the oil supply pressure is controlled within a preset pressure range.

[0070] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0071] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oil supply circuit, characterized in that: Used to supply oil to the deviation correction hydraulic control system, the oil supply circuit includes: a mud pump motor hydraulic system, an oil supply adjustment system and a pressure collection component; The oil supply port of the deviation correction hydraulic control system is communicated with the oil inlet port of the mud pump motor hydraulic system, the pressure collection component is arranged on the oil supply pipeline of the deviation correction hydraulic control system, and the oil supply adjustment system is arranged on the oil return pipeline of the mud pump motor hydraulic system; The pressure collection component is used to collect the oil supply pressure of the correction hydraulic control system, and the oil supply adjustment system is used to adjust the back pressure of the mud pump motor hydraulic system according to the oil supply pressure of the correction hydraulic control system. The oil supply pressure of the correction hydraulic control system is the superposition of the load pressure difference of the mud pump motor and the return oil back pressure. The back pressure of the mud pump motor hydraulic system is used to adjust the oil supply pressure of the correction hydraulic control system within a preset pressure range.

2. The oil supply circuit according to claim 1, characterized in that: The oil supply regulation system includes a control module and a back pressure control valve group; The control module is connected to the back pressure control valve group and the pressure collection assembly respectively, and the back pressure control valve group is arranged on the oil return pipeline between the oil tank and the mud pump motor hydraulic system; The control module is used to receive the oil supply pressure and control the back pressure control valve group to adjust the back pressure of the mud pump motor hydraulic system according to the oil supply pressure.

3. The oil supply circuit according to claim 2, characterized in that: The back pressure control valve group includes a proportional regulating valve; The proportional regulating valve is connected to the control module, and the proportional regulating valve is arranged on the oil return pipeline between the oil tank and the mud pump motor hydraulic system, and the proportional regulating valve is used to adjust the back pressure of the mud pump motor hydraulic system.

4. The oil supply circuit according to claim 3, characterized in that: The proportional regulating valve comprises a proportional relief valve; The proportional relief valve is connected to the control module, and the proportional relief valve is arranged on the oil return pipeline between the oil tank and the mud pump motor hydraulic system, and the proportional relief valve is used to adjust the back pressure of the mud pump motor hydraulic system.

5. The oil supply circuit according to claim 2, characterized in that: The oil supply regulating system also includes a one-way valve; The one-way valve is arranged between the back pressure control valve group and the oil tank, and the one-way valve is used to prevent the oil in the oil tank from flowing back to the back pressure control valve group.

6. The oil supply circuit according to any one of claims 1 to 5, characterized in that: It also includes an oil supply safety valve group; The oil supply safety valve group is arranged on the oil inlet pipeline of the mud pump motor hydraulic system, and the oil supply safety valve group is used to control the pressure of the mud pump motor hydraulic system to be lower than a preset critical value.

7. A fuel supply control method, characterized in that: include: Collecting the oil supply pressure of the deviation correction hydraulic control system, wherein the oil inlet of the deviation correction hydraulic control system is connected with the oil inlet of the mud pump motor hydraulic system; Based on the oil supply pressure, the oil supply pressure is controlled within a preset pressure range by adjusting the back pressure of the mud pump motor hydraulic system.

8. The oil supply control method according to claim 7, characterized in that: Before collecting the oil supply pressure of the deviation correction hydraulic control system, it also includes detecting whether the actuator in the deviation correction hydraulic control system is working; If it is detected that the actuator is in a working state, the oil supply pressure of the deviation correction hydraulic control system is collected; If it is detected that the actuator is in a non-working state, the back pressure of the mud pump motor hydraulic system is adjusted to be reduced to a minimum, so that the mud pump motor hydraulic system works under the minimum back pressure.

9. The oil supply control method according to claim 7 or 8, characterized in that: The step of adjusting the back pressure of the hydraulic system of the mud pump motor comprises: The back pressure of the mud pump motor hydraulic system is adjusted by a back pressure control valve group, and the back pressure control valve group is arranged on an oil tank and an oil return pipeline of the mud pump motor hydraulic system.

10. A working machine, characterized in that: It comprises the oil supply circuit as described in any one of claims 1 to 6, or is used to execute the oil supply control method as described in any one of claims 7 to 9.

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