CN115142784A - An electro-hydraulic hybrid drive method, system, power head and rotary drilling rig - Google Patents

Abstract

The invention discloses an electro-hydraulic hybrid driving method, an electro-hydraulic hybrid driving system, a power head and a rotary drilling rig, wherein the system comprises the following components: the motor driving unit and the hydraulic motor driving unit are respectively and mechanically connected with the power head transmission box, the motor driving unit and the motor floating control unit are connected through wires, and the hydraulic motor driving unit and the hydraulic motor floating control unit are connected through hydraulic pipelines. Generally, only the hydraulic motor drive unit is in a floating state, and the power head transmission case is independently driven by the motor drive unit; when the power head is required to output larger torque, the floating states of the two driving units are released, and a power head transmission box is compositely driven by a motor driving unit and a hydraulic motor driving unit; when the power head is required to throw soil, only the motor driving unit is in a floating state, and the power head transmission case is independently driven by the hydraulic motor driving unit. The system enables the power head to have the characteristics of high efficiency of motor driving, large torque of hybrid driving and good soil throwing performance of hydraulic driving.

Description

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

technical field

The invention belongs to the field of construction machinery, and in particular relates to an electro-hydraulic hybrid driving method, a system, a power head and a rotary drilling rig.

Background technique

Rotary drilling rig is a kind of hole-forming equipment for pile work. It relies on the rotation of the power head to drive the drilling tool to rotate for drilling operations. At present, the driving technology of the power head is mainly driven by hydraulic motor. The hydraulic motor drive has the advantages of small size, high power, quick response, and easy layout. However, due to the internal leakage of the hydraulic motor, the higher the pressure, the greater the leakage, resulting in a certain power. loss.

With the advancement of science and technology, the electrification of construction machinery has gradually risen. In the existing technology, the power head has gradually appeared in the motor drive mode. The motor drive has the advantages of high transmission efficiency and high allowable speed, but there are also shortcomings such as slow start and stop response speeds. , The rotary drilling rig requires the power head to start and stop quickly when the soil is dumped, and the drawbacks of the motor drive are gradually exposed.

SUMMARY OF THE INVENTION

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 rotary drilling rig power head has the characteristics of high efficiency, large torque and good soil rejection performance .

To achieve the above object, the present invention adopts the following technical solutions to realize:

In a first aspect, the present invention provides an electro-hydraulic hybrid drive method, the method is based on an electro-hydraulic hybrid drive system, the system includes a motor drive unit, a hydraulic motor drive unit and a power head gearbox; the motor drive unit , The hydraulic motor drive unit is mechanically connected with 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 large torque and the power head is required 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 large 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 throw 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.

In a second aspect, the present invention provides an electro-hydraulic hybrid drive system, the system comprising a motor drive unit, a hydraulic motor drive unit, a control module and a power head transmission case;

The motor driving unit and the hydraulic motor driving unit are respectively mechanically connected with the power head transmission box to provide driving power for the power head transmission box;

The power head transmission box is used to output rotating power to drive the drilling tool to rotate for drilling operations;

The control module includes a motor float control unit and a hydraulic motor float 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 hydraulically connected to the hydraulic motor driving unit through a pipeline to control whether the hydraulic motor driving unit is in a floating state.

Further, the hydraulic motor driving unit includes a motor and a speed reducer; the motor is connected to the speed reducer and the hydraulic motor floating control unit, and the speed reducer is connected to a power head transmission box.

Further, the system further includes a torque enhancement button and a soil dumping mode button;

Both the torque enhancement button and the soil throwing mode button are signal-connected to the motor floating control unit and the hydraulic motor floating control unit respectively;

The torque boost button can send a torque boost signal to the control module in response to a keying action; the soil rejection mode button can send a soil rejection signal to the control module in response to the keying action;

When the torque enhancement signal and the soil rejection signal are not received, the hydraulic motor floating control unit makes the hydraulic motor driving unit in a floating state, the motor floating control unit makes the motor driving unit release the floating state, and the power head transmission box is independently driven by the motor driving unit;

When receiving the torque enhancement signal, the hydraulic motor floating control unit makes the hydraulic motor drive unit release the floating state, the motor floating control unit makes the motor drive unit release 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 rejection signal, the hydraulic motor floating control unit makes the hydraulic motor drive unit release the floating state, the motor floating control unit makes the motor drive unit in the floating state, and the power head transmission box is independently driven by the hydraulic motor drive unit.

Further, the hydraulic motor floating control unit includes solenoid valves respectively connected with the torque enhancement button and the soil throwing mode button; 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 the torque boost button and the soil dumping mode button are not pressed, the solenoid valve will not be energized. , the two chambers of motor A and B are connected, and the motor is in a floating state; if one of the torque boost button or the soil dumping mode button is pressed, the solenoid valve is energized, the two chambers of motor A and B are not connected, and the floating state of the motor is released. , the motor drives the power head to rotate under the action of the working oil source.

Further, the motor driving unit includes a motor and a motor controller; the motor is connected to the power head transmission box; the motor and the motor controller are electrically connected.

Further, the motor floating control unit is connected in the motor controller, and is respectively connected with 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;

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

Further, an emergency stop module is also provided in the control module;

The emergency stop module is also connected with an emergency stop button;

The emergency stop module can respond to the key-in action of the emergency stop button, so that the control module emergency stops the hydraulic motor drive unit and the motor drive unit.

In a third aspect, the present invention provides a power head, including any one of the electro-hydraulic hybrid drive systems described in the second aspect.

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

Compared with the prior art, the beneficial effects achieved by the present invention:

1. The motor drive replaces the traditional hydraulic motor drive. The transmission efficiency and maximum speed of the motor itself are higher than that of the hydraulic motor, so that the transmission efficiency of the power head and the working speed can be improved.

2. When the power head is under heavy load, the motor and 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 more powerful.

3. Using the quick start and stop characteristics of the hydraulic motor, the impact of the drilling tool when it rotates left and right is more powerful, which is more conducive to the power head to throw soil.

Description of drawings

Figure 1 is a schematic diagram of the framework of the present invention.

Fig. 2 is a working condition control diagram of the present invention.

FIG. 3 is an embodiment of the hydraulic motor float control unit of the present invention.

In the picture: 3-1, motor; 4-1, solenoid valve; 3-2, reducer.

Detailed ways

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

In the description of this embodiment, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", " "External" etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present embodiment and simplifying the description, rather than indicating or implying that the indicated system or element must have a specific orientation, construction and operation in a specific orientation, and therefore should not be construed as a limitation on this embodiment.

Example 1:

This embodiment provides an electro-hydraulic hybrid drive method, which is based on a drive system, and the system includes: a motor drive unit, a motor float control unit, a hydraulic motor drive unit, a hydraulic motor float control unit, and a power head transmission box;

Among them, the motor drive unit and the hydraulic motor drive unit are respectively mechanically connected with 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 .

An electro-hydraulic hybrid driving method in this embodiment, as shown in FIG. 2 , includes:

Usually, only the hydraulic motor drive unit is in a floating state, and the power head gearbox is independently driven by the motor drive unit;

When the power head needs to output a large torque, the floating state of the two driving units is released, and the power head transmission box is driven by the motor driving unit and the hydraulic motor driving unit in combination;

When the power head is required to throw 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.

Embodiment 2:

This embodiment provides an electro-hydraulic hybrid drive system, as shown in FIG. 1 , the system includes a motor drive unit, a hydraulic motor drive unit, a control module and a power head transmission box;

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

The power head transmission box is used to output rotating power to drive the drilling tool 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 with the motor driving unit to control whether the motor driving unit is in a floating state;

The hydraulic motor floating control unit is connected with the hydraulic motor driving unit through a hydraulic pipeline to control whether the hydraulic motor driving unit is in a floating state.

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.

Specifically, the system also includes a torque boost button and a soil dump mode button; only one of the torque boost button and the soil dump mode button can be pressed at the same time.

Both the torque enhancement button and the soil rejection mode button are respectively connected with the electric motor floating control unit and the hydraulic motor floating control unit;

The torque boost button can send a torque boost signal to the control module in response to the keying action; the soil rejection mode button can send a soil rejection signal to the control module in response to the keying action;

as shown in picture 2:

When the torque enhancement signal and the soil rejection 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 makes the motor drive unit release the floating state, and the power head transmission box is driven by the motor drive unit. independent drive;

When receiving the torque enhancement signal, the hydraulic motor floating control unit makes the hydraulic motor drive unit release the floating state, the motor floating control unit makes the motor drive unit release 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 rejection signal, the hydraulic motor floating control unit makes the hydraulic motor drive unit release the floating state, the motor floating control unit makes the motor drive unit in the floating state, and the power head transmission box is independently driven by the hydraulic motor drive unit.

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

Fig. 3 is an embodiment of the hydraulic motor floating control unit. Ports 1 and 2 of the solenoid valve 4-1 are respectively connected with ports A and B of the hydraulic motor 3-1 by pipelines. During the rotation of the motor driving the power head, if the torque If neither the boost button nor the soil dumping mode button is 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 the torque boost button or soil dumping mode When one of the buttons is pressed, 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 is driven by the working oil source. The power head rotates.

Ports 1 and 2 of the solenoid valve 4-1 are respectively connected with ports A and B of the hydraulic motor by pipelines. When the motor drives the power head to rotate, when the solenoid valve 4-1 is not energized, the ports A and B of the motor 3-1 are connected with each other. When the cavity is turned on, 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 is working Under the action of the oil source, the power head is driven to rotate.

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

Specifically, the motor floating control unit is connected in the motor controller, and is respectively connected with the torque enhancement button and the soil dumping mode button, and is used to control whether the motor controller outputs current to the motor, so as to control whether the motor floats;

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

In addition, in order to protect the safety of the drive unit, an emergency stop module is also set in the control module; the emergency stop module is also connected with an emergency stop button; the emergency stop module can respond to the key-in action of the emergency stop button, so that the control module emergency stops the hydraulic motor drive unit and motor drive unit.

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

Embodiment three:

This embodiment provides a power head, including the electro-hydraulic hybrid drive system of the second embodiment.

Embodiment 4:

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

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, the features defined with "first" and "second" may expressly or implicitly include one or more of the features, and in the description of the present invention, "multiple" means two or two above, unless otherwise expressly specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. A first feature "below", "below" and "beneath" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those of ordinary skill in the art will not depart from the principles and spirit of the present invention Variations, modifications, substitutions, and alterations to the above-described embodiments are possible within the scope of the present invention without departing from the scope of the present invention.

Claims (10)

1. An electro-hydraulic hybrid drive method, characterized in that the method is based on an electro-hydraulic hybrid drive system, the system comprising a motor drive unit, a hydraulic motor drive unit and a power head transmission case; the motor drive unit, The hydraulic motor drive units are respectively mechanically connected with 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 large torque and the power head is required 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 large 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 throw 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. 2. An electro-hydraulic hybrid drive system, characterized in that the system comprises a motor drive unit, a hydraulic motor drive unit, a control module and a power head transmission case; The motor driving unit and the hydraulic motor driving unit are respectively mechanically connected with the power head transmission box to provide driving power for the power head transmission box; The power head transmission box is used to output rotating power to drive the drilling tool to rotate for drilling operations; The control module includes a motor float control unit and a hydraulic motor float 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 hydraulically connected to the hydraulic motor driving unit through a pipeline to control whether the hydraulic motor driving unit is in a floating state. 3. The electro-hydraulic hybrid drive system according to claim 2, wherein the hydraulic motor drive unit comprises a motor and a reducer; the motor is connected to the reducer and a hydraulic motor floating control unit, and the reducer Connect the power head gearbox. 4. The electro-hydraulic hybrid drive system according to claim 2, wherein the system further comprises a torque enhancement button and a soil throwing mode button; The torque enhancement button and the soil dumping mode button are both signally connected to the motor floating control unit and the hydraulic motor floating control unit; The torque boost button can send a torque boost signal to the control module in response to a keying action; the soil rejection mode button can send a soil rejection signal to the control module in response to the keying action; When the torque enhancement signal and the soil rejection signal are not received, the hydraulic motor floating control unit makes the hydraulic motor driving unit in a floating state, the motor floating control unit makes the motor driving unit release the floating state, and the power head transmission box is independently driven by the motor driving unit; When receiving the torque enhancement signal, the hydraulic motor floating control unit makes the hydraulic motor drive unit release the floating state, the motor floating control unit makes the motor drive unit release 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 rejection signal, the hydraulic motor floating control unit makes the hydraulic motor drive unit release the floating state, the motor floating control unit makes the motor drive unit in the floating state, and the power head transmission box is independently driven by the hydraulic motor drive unit. 5 . The electro-hydraulic hybrid drive system according to claim 4 , wherein the hydraulic motor floating control unit comprises solenoid valves respectively connected to the torque enhancement button and the soil throwing mode button; the solenoid valves are two-position two Pass 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 the torque boost button and the soil dumping mode button are not pressed, the solenoid valve will not be energized. , the two chambers of motor A and B are connected, and the motor is in a floating state; if one of the torque boost button or the soil dumping mode button is pressed, the solenoid valve is energized, the two chambers of motor A and B are not connected, and the floating state of the motor is released. , the motor drives the power head to rotate under the action of the working oil source. 6 . The electro-hydraulic hybrid drive system according to claim 2 , wherein 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. 7 . 7 . The electro-hydraulic hybrid drive system according to claim 6 , wherein the motor floating control unit is connected to a motor controller, and is respectively connected to a soil dumping mode button for controlling whether the motor controller outputs current to the motor, 8 . So as to control whether the motor floats; When the soil dumping mode button is pressed, the motor floating control unit controls the motor controller to not output current and the motor floats; when the soil dumping mode button is not pressed, the motor controller controls the normal output current and the motor does not float. 8. The electro-hydraulic hybrid drive system according to claim 2, wherein an emergency stop module is further provided in the control module; The emergency stop module is also connected with an emergency stop button; The emergency stop module can respond to the key-in action of the emergency stop button, so that the control module emergency stops the hydraulic motor drive unit and the motor drive unit. 9. A power head, characterized in that it comprises any electro-hydraulic hybrid drive system according to any one of claims 2-8. 10. A rotary drilling rig, comprising the electro-hydraulic hybrid drive system according to any one of claims 2-8 or the power head according to any one of claims 2-8.

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