A rotary drilling machine power assembly cooling system and rotary drilling machine

Abstract

The application provides a rotary drilling rig power assembly cooling system and a rotary drilling rig, which comprises a first driving mechanism, one end of the first driving mechanism being in communication with an oil tank; a second driving mechanism, the second driving mechanism having a liquid inlet, a liquid outlet and a liquid return port; an unloading valve group, one end of the unloading valve group being in communication with the first driving mechanism and the other end being in communication with the liquid inlet of the second driving mechanism, the unloading valve group being used for controlling the pipeline communication or disconnection between the first driving mechanism and the second driving mechanism; and a power assembly, the power assembly having a cooling channel inside, the power assembly having a first cooling inlet, a second cooling inlet and a cooling outlet in communication with the cooling channel, the liquid outlet of the second driving mechanism being in communication with the first cooling inlet and the second cooling inlet, and the liquid return port of the second driving mechanism being in communication with the cooling outlet of the power assembly, so that the second driving mechanism and the cooling channel inside the power assembly form a cooling circulation loop. The application realizes dynamic control of the operation mode of the cooling system.

Description

Technical Field

[0001] This application relates to the field of rotary drilling rig technology, and in particular to a powertrain cooling system for a rotary drilling rig and a rotary drilling rig itself. Background Technology

[0002] Rotary drilling rigs are large-scale engineering machines widely used in pile foundation construction. Their core function is to use a power head to rotate the drilling tool at high speed, using centrifugal force to throw out the soil from the borehole, thereby improving drilling efficiency. Under normal construction conditions, the power head of the rotary drilling rig operates at a low speed. When high-speed conditions requiring rapid soil removal are needed (such as in loose soil layers or large-diameter construction scenarios), the power head switches to a high-speed mode, with speed regulation achieved through a dual-speed reducer. However, when operating at high speed, the internal temperature of the dual-speed reducer rises rapidly, requiring cooling through a cooling system.

[0003] Existing rotary drilling rig cooling systems typically employ independent oil circulation loops or external cooling equipment. However, due to limitations in equipment structure and energy consumption, they struggle to achieve efficient heat dissipation at high speeds and continue operating even at lower speeds, failing to dynamically adjust according to actual needs. This results in unnecessary energy waste and impacts overall energy efficiency. Utility Model Content

[0004] This application provides a powertrain cooling system for a rotary drilling rig and a rotary drilling rig, which dynamically controls the operation mode of the cooling system to optimize energy consumption under non-high speed conditions, reduce the ineffective power loss of the cooling system, and improve the reliability of the cooling system.

[0005] To achieve the aforementioned objectives of this utility model, the present application adopts the following solution:

[0006] In a first aspect, this application provides a powertrain cooling system for a rotary drilling rig, comprising:

[0007] A first drive mechanism, one end of which is connected to the fuel tank;

[0008] The second drive mechanism has a liquid inlet, a liquid outlet, and a liquid return outlet;

[0009] An unloading valve assembly, one end of which is connected to the first drive mechanism and the other end of which is connected to the liquid inlet of the second drive mechanism, is used to control the connection or disconnection of the pipeline between the first drive mechanism and the second drive mechanism.

[0010] The powertrain has a cooling channel and a first cooling inlet, a second cooling inlet, and a cooling outlet connected to the cooling channel. The liquid outlet of the second drive mechanism is connected to the first cooling inlet and the second cooling inlet, and the liquid return port of the second drive mechanism is connected to the cooling outlet of the powertrain, so that the second drive mechanism and the cooling channel inside the powertrain form a cooling circulation loop.

[0011] In one possible implementation, the rotary drilling rig includes a first working condition and a second working condition, and the output power of the powertrain in the first working condition is greater than the output power of the powertrain in the second working condition.

[0012] When the rotary drilling rig is in the first working condition, the unloading valve assembly connects the first drive mechanism and the second drive mechanism to circulate the cooling medium in the oil tank in the cooling circulation loop; when the rotary drilling rig is in the second working condition, it disconnects the first drive mechanism and the second drive mechanism, and the cooling circulation loop stops circulating.

[0013] In one possible implementation, the powertrain includes a gearbox, a first reducer, and a second reducer. Both the first reducer and the second reducer are connected to the gearbox. The first reducer has a first cooling inlet, the second reducer has a second cooling inlet, and the gearbox has a cooling outlet.

[0014] The cooling channel includes: a first cooling channel connected to the first cooling inlet, a second cooling channel connected to the second cooling inlet, and a third cooling channel connected to the cooling outlet;

[0015] The first reducer is provided with the first cooling channel, the second reducer is provided with the second cooling channel, and the gearbox is provided with the third cooling channel. The third cooling channel is connected to both the first cooling channel and the second cooling channel.

[0016] In one possible implementation, it further includes: a diversion valve assembly having an inlet, a first outlet, and a second outlet;

[0017] The inlet is connected to the outlet of the second drive mechanism;

[0018] The first liquid outlet is connected to the first cooling inlet of the first reducer;

[0019] The second liquid outlet is connected to the second cooling inlet of the second reducer.

[0020] In one possible implementation, it further includes a temperature sensor located at the cooling outlet of one of the first and second speed reducers.

[0021] In one possible implementation, it further includes a pressure sensor disposed on the pipeline between the inlet of the diversion valve assembly and the outlet of the second drive mechanism.

[0022] In one possible implementation, it further includes an oil suction filter disposed on a pipeline between the return port of the second drive mechanism and the cooling outlet of the powertrain.

[0023] In one possible implementation, the oil suction filter is further provided with a transmitter, which is used to send an alarm signal to the cooling system when the pressure difference across the oil suction filter is not greater than -0.02 MPa.

[0024] In one possible implementation, the first drive mechanism is a gear pump;

[0025] And / or, the second drive mechanism is a pump motor.

[0026] Secondly, this application provides a rotary drilling rig, including the rotary drilling rig powertrain cooling system described above;

[0027] The rotary drilling rig includes a first working condition and a second working condition, and the power output of the power assembly in the cooling system is greater in the first working condition than the power output of the power assembly in the second working condition;

[0028] When the rotary drilling rig is in the first working condition, the unloading valve assembly connects the first drive mechanism and the second drive mechanism to circulate the cooling medium in the oil tank in the cooling circulation loop; when the rotary drilling rig is in the second working condition, it disconnects the first drive mechanism and the second drive mechanism, and the cooling circulation loop stops circulating.

[0029] The rotary drilling rig powertrain cooling system of this application controls the connection or disconnection of the pipeline between the first drive mechanism and the second drive mechanism through the unloading valve group, thereby realizing dynamic control of the cooling system's operation mode, optimizing energy consumption under non-high speed conditions, reducing the ineffective power loss of the first drive mechanism and the second drive mechanism, improving the cooling efficiency of the cooling system, and simplifying the system structure through the unloading valve group, eliminating the need for additional independent cooling equipment, and improving the reliability of the cooling system. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0031] Figure 1 This is a schematic diagram of the cooling system of the rotary drilling rig powertrain in one embodiment of this application;

[0032] Figure 2 This is a flowchart illustrating the status detection process of the powertrain cooling system of a rotary drilling rig in one embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100, First drive mechanism; 200, Oil tank; 300, Second drive mechanism; 400, Unloading valve assembly; 500, Powertrain; 501, Gearbox; 502, First reducer; 503, Second reducer; 600, Cooling passage; 601, First cooling passage; 602, Second cooling passage; 603, Third cooling passage; 700, Flow divider valve assembly; 800, Temperature sensor; 900, Pressure sensor; 1000, Suction oil filter; 1001, Indicator. Detailed Implementation

[0035] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0036] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The following will be combined with the appendix... Figure 1-2 The embodiments of this application will be described below.

[0037] This application provides a cooling system for the powertrain of a rotary drilling rig. See also... Figure 1The rotary drilling rig powertrain cooling system includes: a first drive mechanism 100, one end of which is connected to an oil tank 200; a second drive mechanism 300, which has an inlet, an outlet, and a return port; and an unloading valve assembly 400, one end of which is connected to the first drive mechanism 100, and the other end of which is connected to the inlet of the second drive mechanism 300. The unloading valve assembly 400 is used to control the cooling of the first drive mechanism 100 and the second drive mechanism 300. The pipelines between the powertrain 500 are connected or disconnected. The powertrain 500 has a cooling channel 600 and a first cooling inlet, a second cooling inlet, and a cooling outlet connected to the cooling channel 600. The liquid outlet of the second drive mechanism 300 is connected to the first cooling inlet and the second cooling inlet, and the liquid return port of the second drive mechanism 300 is connected to the cooling outlet of the powertrain 500, so that the second drive mechanism 300 and the cooling channel 600 inside the powertrain 500 form a cooling circulation loop.

[0038] In this embodiment, the rotary drilling rig powertrain cooling system is applied in the rotary drilling rig. The first drive mechanism 100 has an inlet and an outlet, and the second drive mechanism 300 has an inlet, an outlet, and a return outlet. The inlet of the first drive mechanism 100 is connected to the oil tank 200. The unloading valve assembly 400 is connected between the outlet of the first drive mechanism 100 and the inlet of the second drive mechanism 300. The powertrain 500 has a cooling channel 600 and a first cooling inlet and a second cooling inlet connected to the cooling channel 600. The cooling outlet of the second drive mechanism 300 is connected to the first cooling inlet and the second cooling inlet. The return outlet of the second drive mechanism 300 is connected to the cooling outlet of the powertrain 500. The second drive mechanism 300 and the cooling channel 600 inside the powertrain 500 form a cooling circulation loop. The connection or disconnection of the pipeline between the first drive mechanism 100 and the second drive mechanism 300 is controlled by the unloading valve group 400, thereby controlling the conduction or disconnection of the cooling circulation loop, and thus dynamically controlling the operation mode of the cooling system.

[0039] In some embodiments, the unloading valve assembly 400 includes a solenoid valve that starts or closes the unloading valve assembly 400 according to an external control signal. This enables precise switching of the pipeline between the first drive mechanism 100 and the second drive mechanism 300, improving the system's response speed.

[0040] In some embodiments, see Figure 1 The unloading valve assembly 400 is connected to the oil tank 200. Thus, when the unloading valve assembly 400 is closed, the oil in the first drive mechanism 100 flows directly back to the oil tank 200 through the unloading valve assembly 400, without starting the second drive mechanism 300, thereby reducing system energy consumption.

[0041] In some embodiments, see Figure 1 The rotary drilling rig includes a first working condition and a second working condition. The output power of the powertrain 500 in the first working condition is greater than that in the second working condition. When the rotary drilling rig is in the first working condition, the unloading valve assembly 400 connects the first drive mechanism 100 and the second drive mechanism 300 to circulate the cooling medium in the oil tank 200 through the cooling loop. When the rotary drilling rig is in the second working condition, it disconnects the first drive mechanism 100 and the second drive mechanism 300, stopping the cooling loop. Thus, the unloading valve assembly 400 connects or disconnects the cooling loop according to the working condition of the rotary drilling rig, dynamically controlling the operation mode of the cooling system.

[0042] Understandably, when the rotary drilling rig is in its first operating condition, the mechanical friction and load on the powertrain 500 increase significantly, causing its internal temperature to rise rapidly. The unloading valve assembly 400 connects the first drive mechanism 100 and the second drive mechanism 300, opening the cooling circulation loop and circulating cooling for the powertrain 500, thus improving its heat dissipation efficiency. When the rotary drilling rig is in its second operating condition, the mechanical friction and load on the powertrain 500 are lower, and its internal temperature changes more slowly. The unloading valve assembly 400 disconnects the first drive mechanism 100 and the second drive mechanism 300, breaking the cooling circulation loop. The powertrain 500 is cooled solely by its internal cooling medium, eliminating the need to activate the first drive mechanism 100 and the second drive mechanism 300, thereby reducing the ineffective power loss of the first drive mechanism 100 and the second drive mechanism 300.

[0043] In one possible implementation, the first working condition is a soil-throwing working condition, and the second working condition is a non-soil-throwing working condition.

[0044] In some embodiments, see Figure 1The powertrain 500 includes a gearbox 501, a first reducer 502, and a second reducer 503. Both the first reducer 502 and the second reducer 503 are connected to the gearbox 501. The first reducer 502 has a first cooling inlet, and the second reducer 503 has a second cooling inlet. The gearbox 501 has a cooling outlet. The cooling channel 600 includes a first cooling channel 601 connected to the first cooling inlet, a second cooling channel 602 connected to the second cooling inlet, and a third cooling channel 603 connected to the cooling outlet. The first reducer 502 has the first cooling channel 601, the second reducer 503 has the second cooling channel 602, and the gearbox 501 has the third cooling channel 603. The third cooling channel 603 is connected to both the first cooling channel 601 and the second cooling channel 602. Thus, a cooling circulation loop is formed through the first cooling channel 601, the second cooling channel 602 and the third cooling channel 603, which achieves sufficient lubrication and cooling of the gearbox 501, the first reducer 502 and the second reducer 503, thereby improving the cooling effect and efficiency of the cooling system on the powertrain 500.

[0045] It should be noted that the first reducer 502 and the second reducer 503 are used to switch between high-speed and low-speed operating conditions.

[0046] It is understandable that there can be multiple reducers in the powertrain 500, and all of these reducers are connected to the gearbox 501.

[0047] In some embodiments, see Figure 1 The cooling system of the rotary drilling rig's powertrain also includes a flow divider valve assembly 700. The flow divider valve assembly 700 has an inlet, a first outlet, and a second outlet. The inlet is connected to the outlet of the second drive mechanism 300, the first outlet is connected to the first cooling inlet of the first reducer 502, and the second outlet is connected to the second cooling inlet of the second reducer 503. In this way, the oil output from the first drive mechanism 100 can be evenly distributed to multiple reducers, ensuring that each reducer receives balanced lubrication and cooling.

[0048] Understandably, the number of outlets of the diverter valve assembly 700 is the same as the number of reducers. The diverter valve assembly 700 can simultaneously distribute the oil output from the first drive mechanism 100 to multiple reducers, ensuring that the amount of oil input to each reducer is the same, so that each reducer can achieve sufficient cooling and lubrication, and improve the service life of the equipment.

[0049] In one possible implementation, see Figure 1 The flow divider valve assembly 700 also has a third outlet that can be connected to the oil tank 200. This allows the oil in the flow divider valve assembly 700 to be drained during cooling system maintenance.

[0050] In some embodiments, see Figures 1-2 The rotary drilling rig's powertrain cooling system also includes a temperature sensor 800, which is located at the cooling outlet of one of the first reducers 502 and the second reducer 503. This allows for the detection of the oil temperature within the cooling channel 600, preventing overheating and damage to components in the powertrain 500 due to excessively high oil temperatures, thus improving equipment operational safety.

[0051] In one possible implementation, the temperature sensor 800 can be a thermistor temperature sensor or an infrared temperature sensor.

[0052] It should be noted that temperature sensors 800 can be installed at the cooling outlets of both the first reducer 502 and the second reducer 503.

[0053] It is understandable that there can be multiple temperature sensors 800, or they can be arranged in other locations on the cooling channel 600.

[0054] In some embodiments, the temperature of the oil in the cooling circulation loop needs to be below 85 degrees Celsius.

[0055] In some embodiments, see Figures 1-2 The rotary drilling rig's powertrain cooling system also includes a pressure sensor 900, which is installed on the pipeline between the inlet of the diversion valve assembly 700 and the outlet of the second drive mechanism 300. This allows for the detection of oil pressure within the cooling channel 600, preventing abnormal pressure in the cooling circulation loop and improving the reliability of the system.

[0056] In one possible implementation, the pressure sensor 900 can be a capacitive pressure sensor or a piezoresistive pressure sensor.

[0057] It should be noted that the pressure sensor 900 detects the pressure value of the oil at the outlet of the second drive mechanism 300 to determine whether there is an abnormal oil pressure in the cooling circulation circuit. When the pressure is lower or higher than the normal range, the pressure sensor 900 triggers an alarm signal to remind the staff to carry out maintenance and avoid lubrication failure or oil leakage in the refrigeration system due to abnormal oil pressure.

[0058] Understandably, the pressure sensor 900 can also be installed in other locations on the cooling channel 600.

[0059] In some embodiments, the oil pressure in the cooling circulation loop needs to be higher than 0.3 MPa and lower than 2 MPa.

[0060] In some embodiments, see Figure 1The rotary drilling rig's powertrain cooling system also includes an oil suction filter 1000, which is installed on the pipeline between the return port of the second drive mechanism 300 and the cooling outlet of the powertrain 500. In this way, the oil suction filter 1000 filters impurities in the oil, preventing these impurities from causing wear on the components within the powertrain 500 and extending the equipment's service life.

[0061] In one possible implementation, the number of oil suction filters 1000 can be multiple.

[0062] In some embodiments, see Figures 1-2 The oil suction filter 1000 is also equipped with a transmitter 1001, which sends an alarm signal to the cooling system when the pressure difference across the oil suction filter 1000 is no greater than -0.02 MPa. This allows for the detection and assessment of the blockage status of the oil suction filter 1000 element, facilitating timely replacement of the filter element.

[0063] Under normal conditions, the pressure difference across the oil suction filter 1000 is greater than -0.02 MPa. When the filter element becomes clogged, causing the pressure difference of the oil across the oil suction filter 1000 to be less than or equal to -0.02 MPa, the transmitter 1001 will issue an alarm signal to remind the staff to replace the filter element.

[0064] In some embodiments, the first drive mechanism 100 is a gear pump. This allows for an increase in the flow rate of the oil in the cooling system, thereby improving the cooling efficiency of the system.

[0065] In some embodiments, the second drive mechanism 300 is a pump motor. This allows the drive oil to circulate within the cooling channel 600, improving the cooling efficiency of the cooling system.

[0066] In one possible implementation, the second drive mechanism 300 is connected to the oil tank 200.

[0067] In some embodiments, the rotary drilling rig powertrain cooling system further includes a controller, which is electrically connected to the unloading valve assembly 400, temperature sensor 800, pressure sensor 900, and transmitter 1001. Thus, the controller dynamically controls the operating mode of the cooling system according to the operating status of the rotary drilling rig, improving the ease of use of the cooling system.

[0068] In addition, this application also provides a rotary drilling rig, see [link to relevant documentation]. Figure 1The rotary drilling rig powertrain cooling system includes any of the above embodiments. The rotary drilling rig includes a first working condition and a second working condition. The output power of the powertrain 500 in the cooling system is greater than the output power of the powertrain 500 in the second working condition. When the rotary drilling rig is in the first working condition, the unloading valve group 400 connects the first drive mechanism 100 and the second drive mechanism 300 to circulate the cooling medium in the oil tank 200 in the cooling loop. When the rotary drilling rig is in the second working condition, the connection between the first drive mechanism 100 and the second drive mechanism 300 is disconnected, and the cooling loop stops circulating.

[0069] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments" used in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Additionally, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0070] Finally, it should be noted that other embodiments of this utility model will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A cooling system for the powertrain of a rotary drilling rig, characterized in that, include: A first drive mechanism, one end of which is connected to the fuel tank; The second drive mechanism has a liquid inlet, a liquid outlet, and a liquid return outlet; An unloading valve assembly, one end of which is connected to the first drive mechanism and the other end of which is connected to the liquid inlet of the second drive mechanism, is used to control the connection or disconnection of the pipeline between the first drive mechanism and the second drive mechanism. The powertrain has a cooling channel and a first cooling inlet, a second cooling inlet, and a cooling outlet connected to the cooling channel. The liquid outlet of the second drive mechanism is connected to the first cooling inlet and the second cooling inlet, and the liquid return port of the second drive mechanism is connected to the cooling outlet of the powertrain, so that the second drive mechanism and the cooling channel inside the powertrain form a cooling circulation loop.

2. The rotary drilling rig powertrain cooling system according to claim 1, characterized in that, The rotary drilling rig includes a first working condition and a second working condition, and the output power of the powertrain in the first working condition is greater than the output power of the powertrain in the second working condition; When the rotary drilling rig is in the first working condition, the unloading valve group connects the first drive mechanism and the second drive mechanism to circulate the cooling medium in the oil tank in the cooling circulation loop. When the rotary drilling rig is in the second working condition, the first drive mechanism and the second drive mechanism are disconnected, and the cooling circulation loop stops circulating.

3. The rotary drilling rig powertrain cooling system according to claim 1, characterized in that, The powertrain includes a gearbox, a first reducer, and a second reducer. Both the first reducer and the second reducer are connected to the gearbox. The first reducer has a first cooling inlet, the second reducer has a second cooling inlet, and the gearbox has a cooling outlet. The cooling channel includes: a first cooling channel connected to the first cooling inlet, a second cooling channel connected to the second cooling inlet, and a third cooling channel connected to the cooling outlet; The first reducer is provided with the first cooling channel, the second reducer is provided with the second cooling channel, and the gearbox is provided with the third cooling channel. The third cooling channel is connected to both the first cooling channel and the second cooling channel.

4. The rotary drilling rig powertrain cooling system according to claim 3, characterized in that, Also includes: The diversion valve assembly has an inlet, a first outlet, and a second outlet. The inlet is connected to the outlet of the second drive mechanism; The first liquid outlet is connected to the first cooling inlet of the first reducer; The second liquid outlet is connected to the second cooling inlet of the second reducer.

5. The rotary drilling rig powertrain cooling system according to claim 3, characterized in that, Also includes: A temperature sensor is located at the cooling outlet of one of the first and second speed reducers.

6. The rotary drilling rig powertrain cooling system according to claim 4, characterized in that, Also includes: A pressure sensor is disposed on the pipeline between the inlet of the diversion valve assembly and the outlet of the second drive mechanism.

7. The rotary drilling rig powertrain cooling system according to any one of claims 1-6, characterized in that, Also includes: An oil suction filter is disposed on the pipeline between the return port of the second drive mechanism and the cooling outlet of the powertrain.

8. The rotary drilling rig powertrain cooling system according to claim 7, characterized in that, The oil suction filter is also equipped with a transmitter, which is used to send an alarm signal to the cooling system when the pressure difference across the oil suction filter is not greater than -0.02MPa.

9. The rotary drilling rig powertrain cooling system according to any one of claims 1-6, characterized in that, The first driving mechanism is a gear pump; And / or, the second drive mechanism is a pump motor.

10. A rotary drilling rig, characterized in that, Includes the powertrain cooling system for rotary drilling rigs as described in any one of claims 1-9; The rotary drilling rig includes a first working condition and a second working condition, and the output power of the powertrain in the cooling system is greater in the first working condition than the output power of the powertrain in the second working condition. When the rotary drilling rig is in the first working condition, the unloading valve group connects the first drive mechanism and the second drive mechanism to circulate the cooling medium in the oil tank in the cooling circulation loop. When the rotary drilling rig is in the second working condition, the first drive mechanism and the second drive mechanism are disconnected, and the cooling circulation loop stops circulating.

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