An electro-hydraulic hybrid driving method, system, power head and rotary drilling rig

Abstract

The present invention discloses an electro-hydraulic hybrid driving method, system, power head and rotary drilling rig, the system comprising: a motor drive unit and a hydraulic motor drive unit are respectively mechanically connected to the power head transmission box, the motor drive unit and the motor floating control unit are connected by wires, and the hydraulic motor drive unit and the hydraulic motor floating control unit are connected by hydraulic pipelines. Generally, only the hydraulic motor drive unit is in a floating state, and the power head transmission box is independently driven by the motor drive unit; when the power head needs to output a large torque, the floating states of the two drive units are released, and the power head transmission box is compositely driven by the motor drive unit and the hydraulic motor drive unit; when the power head needs to dump soil, only the motor drive unit is in a floating state, and the power head transmission box is independently driven by the hydraulic motor drive unit. This system enables the power head to have the characteristics of high efficiency of motor drive, large torque of hybrid drive, and good soil dumping performance of hydraulic drive.

Description

Technical Field

[0001] The present invention belongs to the field of engineering machinery, and in particular relates to an electro-hydraulic hybrid driving method, system, power head and rotary drilling rig. Background Art

[0002] A rotary drilling rig is a type of pile drilling equipment that relies on the rotation of the power head to drive the drill tool to rotate for drilling operations. At present, the driving technology used by the power head is mainly hydraulic motor drive, which has the advantages of small size, high power, rapid response, and easy layout. However, due to internal leakage of the hydraulic motor, the higher the pressure, the greater the leakage, resulting in a certain power loss.

[0003] With the advancement of science and technology, the electrification of construction machinery has gradually emerged. In the existing technology, motor drive has gradually appeared in the power head. Motor drive has the advantages of high transmission efficiency and high allowable speed, but it also has shortcomings such as slow start and stop response speed. When the rotary drilling rig is dumping soil, the power head is required to start and stop quickly, and the disadvantages of motor drive are gradually exposed. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide an electro-hydraulic hybrid drive method, system, power head and rotary drilling rig, so that the power head of the rotary drilling rig has the characteristics of high efficiency, large torque and good soil throwing performance.

[0005] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0006] In a first aspect, the present invention provides an electro-hydraulic hybrid driving method, the method is based on an electro-hydraulic hybrid driving system, the system comprises a motor driving unit, a hydraulic motor driving unit and a power head transmission box; the motor driving unit and the hydraulic motor driving unit are respectively mechanically connected to the power head transmission box to provide driving power for the power head transmission box;

[0007] The method includes:

[0008] When the power head is not required to output a large torque or to throw soil, only the hydraulic motor drive unit is placed in a floating state, and the power head transmission box is independently driven by the motor drive unit;

[0009] When the power head needs to output a larger torque, the floating state of the motor drive unit and the hydraulic motor drive unit is released, and the power head transmission box is driven by the motor drive unit and the hydraulic motor drive unit;

[0010] When the power head is required to dump soil, only the motor drive unit is placed in a floating state, and the power head transmission box is independently driven by the hydraulic motor drive unit.

[0011] In a second aspect, the present invention provides an electric-hydraulic hybrid drive system, the system comprising an electric motor drive unit, a hydraulic motor drive unit, a control module and a power head transmission box;

[0012] The electric motor drive unit and the hydraulic motor drive unit are respectively mechanically connected to the power head transmission box to provide driving power for the power head transmission box;

[0013] The power head transmission box is used to output the rotating power to drive the drill to rotate for drilling operations;

[0014] The control module includes a motor floating control unit and a hydraulic motor floating control unit;

[0015] The motor floating control unit is electrically connected to the motor driving unit to control whether the motor driving unit is in a floating state;

[0016] The hydraulic motor floating control unit is hydraulically connected to the hydraulic motor drive unit through a pipeline to control whether the hydraulic motor drive unit is in a floating state.

[0017] Furthermore, the hydraulic motor drive unit includes a motor and a reducer; the motor is connected to the reducer and the hydraulic motor floating control unit, and the reducer is connected to the power head transmission box.

[0018] Further, the system also includes a torque enhancement button and a soil throwing mode button;

[0019] The torque enhancement button and the soil throwing mode button are respectively connected to the motor floating control unit and the hydraulic motor floating control unit by signal;

[0020] The torque enhancement button can send a torque enhancement signal to the control module in response to a key-in action; the soil-throwing mode button can send a soil-throwing signal to the control module in response to a key-in action;

[0021] When the torque enhancement signal and the soil throwing signal are not received, the hydraulic motor floating control unit puts the hydraulic motor drive unit in a floating state, the motor floating control unit releases the motor drive unit from the floating state, and the power head transmission box is independently driven by the motor drive unit;

[0022] When receiving the torque enhancement signal, the hydraulic motor floating control unit releases the hydraulic motor drive unit from the floating state, the motor floating control unit releases the motor drive unit from the floating state, and the power head transmission box is driven by the motor drive unit and the hydraulic motor drive unit;

[0023] When receiving the soil throwing signal, the hydraulic motor floating control unit releases the hydraulic motor drive unit from the floating state, the motor floating control unit puts the motor drive unit into the floating state, and the power head transmission box is independently driven by the hydraulic motor drive unit.

[0024] Furthermore, the hydraulic motor floating control unit includes a solenoid valve connected to the torque enhancement button and the soil throwing mode button respectively; the solenoid valve is a two-position two-way solenoid valve;

[0025] Ports 1 and 2 of the solenoid valve are respectively connected to ports A and B of the hydraulic motor by pipelines. During the process of the motor driving the power head to rotate, if neither the torque enhancement button nor the soil-throwing mode button is pressed, the solenoid valve will not be energized, the motor A and B chambers will be connected, and the motor will be in a floating state; if one of the torque enhancement button or the soil-throwing mode button is pressed, the solenoid valve will be energized, the motor A and B chambers will not be connected, the motor floating state will be released, and the motor will drive the power head to rotate under the action of the working oil source.

[0026] Furthermore, the motor drive unit includes a motor and a motor controller; the motor is connected to a power head transmission box; and the motor and the motor controller are electrically connected.

[0027] Furthermore, the motor floating control unit is connected to the motor controller, and is respectively connected to the torque enhancement button and the soil throwing mode button, and is used to control whether the motor controller outputs current to the motor, thereby controlling whether the motor floats;

[0028] When the soil-shaking mode button is pressed, the motor floating control unit controls the motor controller to not output current, and the motor floats; when the soil-shaking mode button is not pressed, the motor controller controls the normal output current, and the motor does not float.

[0029] Furthermore, an emergency stop module is also provided in the control module;

[0030] The emergency stop module is also connected to an emergency stop button;

[0031] The emergency stop module can respond to the input action of the emergency stop button to enable the control module to emergency stop the hydraulic motor drive unit and the electric motor drive unit.

[0032] In a third aspect, the present invention provides a power head comprising any one of the electric-hydraulic hybrid drive systems described in the second aspect.

[0033] In a fourth aspect, the present invention provides a rotary drilling rig, comprising any one of the electro-hydraulic hybrid drive systems described in the second aspect or the power head described in the third aspect.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The electric motor drive replaces the traditional hydraulic motor drive. The transmission efficiency and maximum speed of the electric motor are higher than those of the hydraulic motor, which can improve the transmission efficiency and working speed of the power head.

[0036] 2. When the power head is under heavy load, the electric motor and the hydraulic motor can drive the power head to rotate at the same time, which increases the torque of the power head and makes the power stronger.

[0037] 3. Utilize the quick start and stop characteristics of the hydraulic motor to make the impact of the drill bit more powerful when it rotates left and right and stops, which is more conducive to the power head to throw away the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the framework of the present invention.

[0039] Figure 2 It is the working condition control diagram of the present invention.

[0040] Figure 3 It is an embodiment of the hydraulic motor floating control unit of the present invention.

[0041] In the figure: 3-1, motor; 4-1, solenoid valve; 3-2, reducer. DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0043] In the description of this embodiment, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this embodiment and simplifying the description, and does not indicate or imply that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this embodiment.

[0044] Embodiment 1:

[0045] This embodiment provides an electro-hydraulic hybrid driving method, which is based on a driving system, which includes: a motor driving unit, a motor floating control unit, a hydraulic motor driving unit, a hydraulic motor floating control unit, and a power head transmission box;

[0046] Among them, the motor drive unit and the hydraulic motor drive unit are mechanically connected to the power head transmission box respectively, the motor drive unit and the motor floating control unit are connected by wires, and the hydraulic motor drive unit and the hydraulic motor floating control unit are connected by hydraulic pipelines.

[0047] An electro-hydraulic hybrid driving method of this embodiment, such as Figure 2 As shown, the method includes:

[0048] Normally, only the hydraulic motor drive unit is in a floating state, and the power head transmission box is independently driven by the motor drive unit;

[0049] When the power head needs to output a larger torque, the floating state of the two drive units is released, and the power head transmission box is driven by the motor drive unit and the hydraulic motor drive unit;

[0050] When the power head is required to dump soil, only the motor drive unit is placed in a floating state, and the power head transmission box is independently driven by the hydraulic motor drive unit.

[0051] Embodiment 2:

[0052] This embodiment provides an electric-hydraulic hybrid drive system, such as Figure 1 As shown, the system includes a motor drive unit, a hydraulic motor drive unit, a control module and a power head transmission box;

[0053] The electric motor drive unit and the hydraulic motor drive unit are respectively mechanically connected to the power head transmission box to provide driving power for the power head transmission box;

[0054] The power head transmission box is used to output the rotating power to drive the drill to rotate for drilling operations;

[0055] The control module includes a motor floating control unit and a hydraulic motor floating control unit;

[0056] The motor floating control unit is electrically connected to the motor driving unit to control whether the motor driving unit is in a floating state;

[0057] The hydraulic motor floating control unit is connected to the hydraulic motor drive unit through a pipeline to control whether the hydraulic motor drive unit is in a floating state.

[0058] Specifically, the hydraulic motor drive unit includes a motor 3-1 and a reducer 3-2; the motor 3-1 is connected to the reducer 3-2 and the hydraulic motor floating control unit, and the reducer 3-2 is connected to the power head transmission box.

[0059] Specifically, the system also includes a torque enhancement button and a soil-throwing mode button; only one of the torque enhancement button and the soil-throwing mode button can be pressed at the same time.

[0060] The torque enhancement button and the soil throwing mode button are respectively connected to the motor floating control unit and the hydraulic motor floating control unit signal;

[0061] The torque enhancement button can send a torque enhancement signal to the control module in response to a key-in action; the soil-throwing mode button can send a soil-throwing signal to the control module in response to a key-in action;

[0062] like Figure 2 As shown:

[0063] When the torque enhancement signal and the soil throwing signal are not received, the hydraulic motor floating control unit makes the hydraulic motor 3-1 drive unit in a floating state, the motor floating control unit releases the motor drive unit from the floating state, and the power head transmission box is independently driven by the motor drive unit;

[0064] When receiving the torque enhancement signal, the hydraulic motor floating control unit releases the hydraulic motor drive unit from the floating state, the motor floating control unit releases the motor drive unit from the floating state, and the power head transmission box is driven by the motor drive unit and the hydraulic motor drive unit;

[0065] When receiving the soil throwing signal, the hydraulic motor floating control unit releases the hydraulic motor drive unit from the floating state, the motor floating control unit puts the motor drive unit into the floating state, and the power head transmission box is independently driven by the hydraulic motor drive unit.

[0066] Specifically, the hydraulic motor floating control unit includes a solenoid valve 4-1 connected to the torque enhancement button and the soil throwing mode button respectively; the solenoid valve 4-1 is a two-position two-way solenoid valve;

[0067] Figure 3 It is an embodiment of a hydraulic motor floating control unit. Ports 1 and 2 of the solenoid valve 4-1 are respectively connected to ports A and B of the hydraulic motor 3-1 by pipelines. During the process of the motor driving the power head to rotate, if the torque enhancement button and the soil-throwing mode button are not pressed, the solenoid valve 4-1 will not be energized, the A and B chambers of the motor 3-1 will be connected, and the motor 3-1 will be in a floating state; if one of the torque enhancement button or the soil-throwing mode button is pressed, the solenoid valve 4-1 will be energized, the A and B chambers of the motor 3-1 will not be connected, the floating state of the motor 3-1 will be released, and the motor 3-1 will drive the power head to rotate under the action of the working oil source.

[0068] Ports 1 and 2 of the solenoid valve 4-1 are connected to ports A and B of the hydraulic motor with pipelines respectively. During the process of the motor driving the power head to rotate, when the solenoid valve 4-1 is not energized, the A and B chambers of the motor 3-1 are connected, and the motor 3-1 is in a floating state; when the solenoid valve 4-1 is energized, the A and B chambers of the motor 3-1 are not connected, the floating state of the motor 3-1 is released, and the motor 3-1 drives the power head to rotate under the action of the working oil source.

[0069] Specifically, the motor drive unit includes a motor and a motor controller; the motor is connected to a power head transmission box; and the motor and the motor controller are electrically connected.

[0070] Specifically, the motor floating control unit is connected to the motor controller, and is respectively connected to the torque enhancement button and the soil throwing mode button, and is used to control whether the motor controller outputs current to the motor, thereby controlling whether the motor floats;

[0071] When the soil-shaking mode button is pressed, the motor floating control unit controls the motor controller to not output current, and the motor floats; when the soil-shaking mode button is not pressed, the motor controller controls the normal output current, and the motor does not float.

[0072] In addition, in order to protect the safety of the drive unit, an emergency stop module is also provided in the control module; the emergency stop module is also connected to an emergency stop button; the emergency stop module can respond to the typing action of the emergency stop button, so that the control module can emergency stop the hydraulic motor drive unit and the electric motor drive unit.

[0073] When encountering an emergency, the operator can press the emergency stop button to stop the entire machine and prevent accidents.

[0074] Embodiment three:

[0075] This embodiment provides a power head, including the electric-hydraulic hybrid drive system of the second embodiment.

[0076] Embodiment 4:

[0077] This embodiment provides a rotary drilling rig, including any one of the above-mentioned electric-hydraulic hybrid drive systems or the power head described in the third embodiment.

[0078] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features, and in the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0079] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0080] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0082] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. An electro-hydraulic hybrid driving method, characterized in that: The method is based on an electric-hydraulic hybrid drive system, which includes an electric motor drive unit, a hydraulic motor drive unit and a power head transmission box; The electric motor drive unit and the hydraulic motor drive unit are respectively mechanically connected to the power head transmission box to provide driving power for the power head transmission box; The method includes: When the power head is not required to output a large torque or to throw soil, only the hydraulic motor drive unit is in a floating state, and the power head transmission box is independently driven by the motor drive unit; When the power head needs to output a larger torque, the floating state of the motor drive unit and the hydraulic motor drive unit is released, and the power head transmission box is driven by the motor drive unit and the hydraulic motor drive unit; When the power head is required to dump soil, only the motor drive unit is placed in a floating state, and the power head transmission box is independently driven by the hydraulic motor drive unit.

2. An electro-hydraulic hybrid drive system, characterized in that: The system includes a motor drive unit, a hydraulic motor drive unit, a control module and a power head transmission box; The electric motor drive unit and the hydraulic motor drive unit are respectively mechanically connected to the power head transmission box to provide driving power for the power head transmission box; The power head transmission box is used to output the rotating power to drive the drill to rotate for drilling operations; The control module includes a motor floating control unit and a hydraulic motor floating control unit; The motor floating control unit is electrically connected to the motor driving unit to control whether the motor driving unit is in a floating state; The hydraulic motor floating control unit is connected to the hydraulic motor drive unit through a hydraulic pipeline to control whether the hydraulic motor drive unit is in a floating state; The hydraulic motor drive unit includes a hydraulic motor and a reducer; the hydraulic motor is connected to the reducer and the hydraulic motor floating control unit, and the reducer is connected to the power head transmission box; The system also includes a torque enhancement button and a soil throwing mode button; The torque enhancement button and the soil throwing mode button are respectively connected to the motor floating control unit and the hydraulic motor floating control unit by signal; The torque enhancement button can send a torque enhancement signal to the control module in response to a key-in action; the soil-throwing mode button can send a soil-throwing signal to the control module in response to a key-in action; When the torque enhancement signal and the soil throwing signal are not received, the hydraulic motor floating control unit puts the hydraulic motor drive unit in a floating state, the motor floating control unit releases the motor drive unit from the floating state, and the power head transmission box is independently driven by the motor drive unit; When receiving the torque enhancement signal, the hydraulic motor floating control unit releases the hydraulic motor drive unit from the floating state, the motor floating control unit releases the motor drive unit from the floating state, and the power head transmission box is driven by the motor drive unit and the hydraulic motor drive unit; When receiving the soil throwing signal, the hydraulic motor floating control unit releases the hydraulic motor drive unit from the floating state, the motor floating control unit puts the motor drive unit in the floating state, and the power head transmission box is independently driven by the hydraulic motor drive unit; The motor drive unit comprises a motor and a motor controller; the motor is connected to a power head transmission box; and the motor and the motor controller are electrically connected.

3. The electric-hydraulic hybrid drive system according to claim 2, characterized in that: The hydraulic motor floating control unit comprises a solenoid valve connected to the torque enhancement button and the soil throwing mode button respectively; the solenoid valve is a two-position two-way solenoid valve; Ports 1 and 2 of the solenoid valve are respectively connected to ports A and B of the hydraulic motor by pipelines. During the process of the motor driving the power head to rotate, if neither the torque enhancement button nor the soil-throwing mode button is pressed, the solenoid valve will not be energized, the A and B chambers of the hydraulic motor will be connected, and the hydraulic motor will be in a floating state; if either the torque enhancement button or the soil-throwing mode button is pressed, the solenoid valve will be energized, the A and B chambers of the hydraulic motor will not be connected, the floating state of the hydraulic motor will be released, and the hydraulic motor will drive the power head to rotate under the action of the working oil source.

4. The electric-hydraulic hybrid drive system according to claim 2, characterized in that: The motor floating control unit is connected to the motor controller and is respectively connected to the soil throwing mode button, and is used to control whether the motor controller outputs current to the motor, thereby controlling whether the motor floats; When the soil throwing mode button is pressed, the motor floating control unit controls the motor controller to stop outputting current, and the motor floats; When the soil-throwing mode button is not pressed, the motor controller controls the normal output current and the motor does not float.

5. The electric-hydraulic hybrid drive system according to claim 2, characterized in that: An emergency stop module is also provided in the control module; The emergency stop module is also connected to an emergency stop button; The emergency stop module can respond to the input action of the emergency stop button to enable the control module to emergency stop the hydraulic motor drive unit and the electric motor drive unit.

6. A power head, characterized in that: It comprises an electric-hydraulic hybrid drive system as described in any one of claims 2 to 5.

7. A rotary drilling rig, comprising the electric-hydraulic hybrid drive system according to any one of claims 2 to 5 or the power head according to claim 6.

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