Vibroseis double-servo-valve vibrator system

Abstract

The utility model provides a vibroseis double-servo-valve vibrator system, belongs to the field of seismic exploration excitation, aims to realize synchronous control of double servo valves, and comprises a piston assembly comprising a piston rod; the hammer body sleeves the piston rod and is in sliding connection with the piston rod; the first servo valve assembly and the second servo valve assembly are symmetrically arranged on the hammer body; the control unit is connected with the first servo valve assembly and the second servo valve assembly and is configured to collect first displacement information and second displacement information, and when the first displacement information represents that the first servo valve assembly moves to a first target limit position and the second displacement information represents that the second servo valve assembly moves to a second target limit position, the first displacement information and the second displacement information are transmitted to the control unit. Steering signals are sent to the first servo valve assembly and the second servo valve assembly respectively; and the first servo valve assembly and the second servo valve assembly are both configured to respond to the steering signal and apply target acting force to the hammer body, so that the moving direction of the hammer body on the piston rod is switched from the original first direction to the second direction.

Description

Technical Field

[0001] This application relates to the field of seismic exploration excitation, and in particular to a controllable source dual servo valve vibrator system. Background Technology

[0002] Controlled seismic sources are important excitation sources for seismic exploration. As the difficulty of exploration increases, higher requirements are placed on controlled seismic sources, which need to be large-tonnage, wide-bandwidth, and low-distortion controlled seismic sources that can generate higher-quality seismic waves and improve the resolution of stratigraphic structures.

[0003] Currently, in order to generate high-quality seismic waves, vibrator structures with dual servo valves are often used to achieve low-frequency and high-frequency extension of the controllable seismic source.

[0004] However, in related technologies, it is impossible to achieve synchronous control of dual servo valves, which affects the excitation of the controllable vibration source. Utility Model Content

[0005] In view of this, this application aims to propose a controllable source dual servo valve vibrator system, which aims to achieve synchronous control of the dual servo valves.

[0006] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0007] A controllable vibration source dual servo valve vibrator system includes: a vibrator and a control unit connected to the vibrator;

[0008] The vibrator includes:

[0009] Piston assembly, including piston rod;

[0010] The hammer body is sleeved on the piston rod and slidably connected to the piston rod;

[0011] A first servo valve assembly and a second servo valve assembly are symmetrically arranged on the hammer body. Both the first servo valve assembly and the second servo valve assembly are configured to provide a force to the hammer body so that the hammer body moves along the longitudinal direction of the piston rod.

[0012] A control unit, connected to the first servo valve assembly and the second servo valve assembly, is configured to acquire first displacement information of the first servo valve assembly and second displacement information of the second servo valve assembly, and to send steering signals to the first servo valve assembly and the second servo valve assembly respectively when the first displacement information indicates that the first servo valve assembly has moved to a first target limit position and the second displacement information indicates that the second servo valve assembly has moved to a second target limit position; wherein the first target limit position and the second target limit position are at the same horizontal height;

[0013] Both the first servo valve assembly and the second servo valve assembly are configured to apply a target force to the hammer body in response to the steering signal, so as to switch the direction of movement of the hammer body on the piston rod from the original first direction to the second direction.

[0014] Optionally, the control unit includes:

[0015] A displacement sensor is connected to the first servo valve assembly and the second servo valve assembly respectively, and is configured to collect the first displacement information and the second displacement information;

[0016] The controller, connected to the displacement sensor, is configured to receive the first displacement information and the second displacement information, and to send the steering signal to the first servo valve assembly and the second servo valve assembly respectively when the first displacement information indicates that the first servo valve assembly has moved to the first target limit position and the second displacement information indicates that the second servo valve assembly has moved to the second target limit position.

[0017] Optionally, the piston assembly further includes a piston disposed on the piston rod; the hammer body, the piston rod, and the piston form a first chamber and a second chamber;

[0018] The first servo valve assembly includes: a first servo valve, and a first oil passage and a second oil passage formed in the hammer body. The first servo valve is connected to the first chamber through the first oil passage and to the second chamber through the second oil passage.

[0019] The second servo valve assembly includes: a second servo valve, and a third oil passage and a fourth oil passage formed in the hammer body. The second servo valve is connected to the first chamber through the third oil passage and to the second chamber through the fourth oil passage. High-pressure hydraulic oil is present in both the first servo valve and the second servo valve.

[0020] Optionally, the control unit, connected to the first servo valve and the second servo valve, is configured to send a first steering signal to the first servo valve and the second servo valve respectively when the first displacement information indicates that the first servo valve assembly has moved to the first target limit position and the second displacement information indicates that the second servo valve assembly has moved to the second target limit position.

[0021] The first servo valve is configured to supply oil to the first chamber through a first oil passage in response to the first steering signal, so as to apply a first target force to the hammer; the second chamber is configured to return oil to the first servo valve through a second oil passage.

[0022] The second servo valve is configured to supply oil to the first chamber via a third oil passage in response to the first steering signal, so as to apply the first target force to the hammer; the second chamber is configured to return oil to the second servo valve via the fourth oil passage;

[0023] The hammer is configured to move along the piston rod toward the top of the vibrator in response to the first target force.

[0024] Optionally, the control unit is further configured to send a second steering signal to the first servo valve and the second servo valve respectively when the first displacement information indicates that the first servo valve assembly has moved to the first target limit position and the second displacement information indicates that the second servo valve assembly has moved to the second target limit position;

[0025] The first servo valve is configured to supply oil to the second chamber through the second oil passage in response to the second steering signal, so as to apply a second target force to the hammer; the first chamber is configured to return oil to the first servo valve through the first oil passage;

[0026] The second servo valve is configured to supply oil to the second chamber through the fourth oil passage in response to the second steering signal, so as to apply the second target force to the hammer; the first chamber is configured to return oil to the second servo valve through the third oil passage;

[0027] The hammer is configured to move along the piston rod away from the top of the vibrator in response to the second target force.

[0028] Optionally, the first oil passage and the third oil passage are in a straight line through the first chamber;

[0029] The second oil passage and the fourth oil passage are in a straight line through the second chamber.

[0030] Optionally, the vibrator further includes an accumulator, which is connected to the first servo valve and the second servo valve and is configured to supply the high-pressure hydraulic oil to the first servo valve and the second servo valve.

[0031] Optionally, the piston assembly further includes a sleeve fitted on the piston rod, the sleeve being slidably connected to the piston rod, and the hammer being fixedly fitted outside the sleeve.

[0032] Optionally, the vibrator further includes an end cap configured to press the sleeve between the piston rod and the hammer.

[0033] Optionally, the piston is located in the middle of the piston rod, and the first chamber and the second chamber are equal in size and volume.

[0034] Compared with existing technologies, the controllable vibration source dual servo valve vibrator system described in this application has the following advantages:

[0035] This application provides a controllable vibration source dual servo valve vibrator system, comprising: a vibrator and a control unit connected to the vibrator; wherein, the vibrator includes: a piston assembly including a piston rod; a hammer body sleeved on the piston rod and slidably connected to the piston rod; a first servo valve assembly and a second servo valve assembly symmetrically arranged on the hammer body, both the first servo valve assembly and the second servo valve assembly being configured to provide a force to the hammer body to move the hammer body along the longitudinal direction of the piston rod; the control unit is connected to the first servo valve assembly and the second servo valve assembly, and is configured to acquire first displacement information of the first servo valve assembly and the second servo valve assembly. The second displacement information of the two servo valve assemblies is used to send steering signals to the first servo valve assembly and the second servo valve assembly respectively when the first displacement information indicates that the first servo valve assembly has moved to the first target limit position and the second displacement information indicates that the second servo valve assembly has moved to the second target limit position; wherein the first target limit position and the second target limit position are at the same horizontal height; the first servo valve assembly and the second servo valve assembly are both configured to apply a target force to the hammer body in response to the steering signal, so that the direction of movement of the hammer body on the piston rod is switched from the original first direction to the second direction.

[0036] Therefore, this application connects the control unit to the first servo valve assembly and the second servo valve assembly in the vibrator, and collects the displacement information of the first servo valve assembly and the second servo valve assembly in real time. When the first displacement information of the first servo valve assembly indicates that the first servo valve assembly has moved to the first target limit position, and the second displacement information indicates that the second servo valve assembly has moved to the second target limit position, wherein the first target limit position and the second target limit position are at the same horizontal height, a turning signal is sent to the first servo valve assembly and the second servo valve assembly, so that the first servo valve assembly and the second servo valve assembly can work simultaneously, apply a target force to the hammer body, and drive the hammer body to switch its movement direction on the piston rod from the original first direction to the second direction. This realizes that the first servo valve assembly and the second servo valve assembly synchronously drive the hammer body in the vibrator, improves the excitation energy of the vibrator, and ensures high-quality excitation of the controllable vibration source. Attached Figure Description

[0037] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0038] Figure 1 This is a simplified schematic diagram of a controllable vibration source dual servo valve vibrator system according to an embodiment of this application;

[0039] Figure 2 This is a schematic diagram of the structure of a control unit according to an embodiment of this application;

[0040] Figure 3 This is a schematic diagram of the structure of a controllable vibration source dual servo valve vibrator system according to an embodiment of this application;

[0041] Figure 4 This is a top view of the vibrator described in an embodiment of this application;

[0042] Figure 5 This is a cross-sectional view of the oil passage in the piston chamber of a traditional piston vibrator hammer.

[0043] Reference numerals: 1. Vibrator; 11. Piston assembly; 111. Piston rod; 112. Piston; 113. Sleeve; 12. Hammer; 13. First servo valve assembly; 131. First servo valve; 132. First oil passage; 133. Second oil passage; 14. Second servo valve assembly; 141. Second servo valve; 142. Third oil passage; 143. Fourth oil passage; 15. First chamber; 16. Second chamber; 17. Accumulator; 18. End cap; 2. Control unit; 21. Displacement sensor; 22. Controller; 3. Oil passage; 4. Vibration source controller. Detailed Implementation

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0045] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] This application proposes a controllable source dual servo valve vibrator system, referring to... Figure 1 , Figure 1 A simplified schematic diagram of a controllable vibration source dual servo valve vibrator system according to an embodiment of this application is shown, as follows: Figure 1 As shown, the controllable source dual servo valve vibrator system includes: a vibrator 1 and a control unit 2 connected to the vibrator 1;

[0047] The vibrator 1 includes:

[0048] Piston assembly 11 includes piston rod 111;

[0049] Hammer body 12 is sleeved on the piston rod 111 and slidably connected to the piston rod 111;

[0050] A first servo valve assembly 13 and a second servo valve assembly 14 are symmetrically arranged on the hammer body 12. Both the first servo valve assembly 13 and the second servo valve assembly 14 are configured to provide force to the hammer body 12 so that the hammer body 12 moves along the longitudinal direction of the piston rod 111.

[0051] The control unit 2, connected to the first servo valve assembly 13 and the second servo valve assembly 14, is configured to collect first displacement information of the first servo valve assembly 13 and second displacement information of the second servo valve assembly 14, and send steering signals to the first servo valve assembly 13 and the second servo valve assembly 14 respectively when the first displacement information indicates that the first servo valve assembly 13 has moved to a first target limit position and the second displacement information indicates that the second servo valve assembly 14 has moved to a second target limit position; wherein the first target limit position and the second target limit position are at the same horizontal height;

[0052] Both the first servo valve assembly 13 and the second servo valve assembly 14 are configured to apply a target force to the hammer 12 in response to the steering signal, so that the direction of movement of the hammer 12 on the piston rod 111 is switched from the original first direction to the second direction.

[0053] In this embodiment, the vibrator 1 includes a piston assembly 11, a hammer 12, a first servo valve assembly 13, and a second servo valve assembly 14. By applying the same force to the hammer 12 through the first servo valve assembly 13 and the second servo valve assembly 14, the hammer 12 can move along the longitudinal direction of the piston rod 111 of the piston assembly 11. In this way, the first servo valve assembly 13 and the second servo valve assembly 14 continuously apply force to the hammer 12, which can cause the hammer 12 to vibrate up and down on the piston rod 111, thereby generating seismic waves.

[0054] The hammer body 12 can be a rectangular block or an octagonal block, and it has two working limit positions, including a first working limit position and a second working limit position. The first working limit position is close to the top of the vibrator 1, and the second working limit position is close to the bottom of the vibrator 1.

[0055] It should be noted that since the first servo valve assembly 13 and the second servo valve assembly 14 are mounted on the hammer body 12, when the hammer body 12 vibrates, the first servo valve assembly 13 and the second servo valve assembly 14 will also vibrate accordingly. Correspondingly, the first servo valve assembly 13 and the second servo valve assembly 14 also have their own limit working positions. That is, when the hammer body 12 moves to the first working limit position, the first servo valve assembly 13 and the second servo valve assembly 14 will also move to their respective limit working positions along with the hammer body 12; when the hammer body 12 moves to the second working limit position, the first servo valve assembly 13 and the second servo valve assembly 14 will also move to their respective other limit working positions along with the hammer body 12.

[0056] In practice, the first servo valve assembly 13 and the second servo valve assembly 14 cannot work in precise synchronization. For example, the following situation may occur: the direction of the force applied by the first servo valve assembly 13 to the hammer body 12 is opposite to the direction of the force applied by the second servo valve assembly 14 to the hammer body 12, which affects the movement of the hammer body 12 on the piston rod 111, that is, affects the vibration of the hammer body 12.

[0057] Therefore, in order to ensure the normal vibration of the hammer 12, it is necessary to ensure that the first servo valve assembly 13 and the second servo valve assembly 14 work synchronously and apply the same force to the hammer 12 at the same time. When the hammer 12 moves to one of its working limit positions, for example, when it moves to the first working limit position (at this time, the first servo valve assembly 13 and the second servo valve assembly 14 also move to their respective working limit positions), the first servo valve assembly 13 and the second servo valve assembly 14 again apply a force to the hammer 12 in the opposite direction to the previous force, so that the direction of movement of the hammer 12 on the piston rod 111 changes from the original first direction to the second direction, and moves to the second working limit position until it moves to the second working limit position (at this time, the first servo valve assembly 13 and the second servo valve assembly 14 also move to their respective other working limit positions). In this way, the hammer 12 can vibrate up and down normally.

[0058] Therefore, in this embodiment, a control unit 2 is also provided. The control unit 2 is connected to the first servo valve assembly 13 and the second servo valve assembly 14. The control unit 2 can collect the displacement information of the first servo valve assembly 13 and the second servo valve assembly 14 in real time, that is, the first displacement information of the first servo valve assembly 13 and the second displacement information of the second servo valve assembly 14. When the first displacement information indicates that the first servo valve assembly 13 has moved to the first target limit position and the second displacement information indicates that the second servo valve assembly 14 has moved to the second target limit position, the first target limit position and the second target limit position are at the same horizontal height. That is to say, when the first servo valve assembly 13 and the second servo valve assembly 14 move to the same horizontal working limit position, it indicates that the hammer 12 has also moved to the limit working position. At this time, the control unit 2 can send a steering signal to the first servo valve assembly 13 and the second servo valve assembly 14 respectively, drive the first servo valve assembly 13 and the second servo valve assembly 14 to work, and at the same time apply a target force to the hammer 12, so that the movement direction of the hammer 12 on the piston rod changes from the original first direction to the second direction, thereby realizing the reversal of the hammer 12.

[0059] The first target limit position and the second target limit position can be either the limit working position near the top of the vibrator 1 or the limit working position near the bottom of the vibrator 1.

[0060] In one example, the first direction can be a direction close to the top of the vibrator 1, and the second direction can be a direction away from the top of the vibrator 1. In another example, the first direction can also be a direction away from the top of the vibrator 1, and the second direction can be a direction close to the top of the vibrator 1.

[0061] Therefore, in this embodiment of the application, the control unit 2 collects the displacement information of the first servo valve assembly 13 and the second servo valve assembly 14, and monitors the displacement information of the first servo valve assembly 13 and the second servo valve assembly 14. This ensures that the first servo valve assembly 13 and the second servo valve assembly 14 are only driven to work when they have both moved to their respective limit working positions and are at the same horizontal height. This achieves real-time synchronous control of the first servo valve assembly 13 and the second servo valve assembly 14, enabling the first servo valve assembly 13 and the second servo valve assembly 14 to synchronously drive the hammer 12, thereby increasing the excitation energy of the vibration system and ensuring high-quality excitation of the controllable vibration source.

[0062] Furthermore, in this embodiment, since the first servo valve assembly 13 and the second servo valve assembly 14 are symmetrically arranged on the hammer body 12, the horizontal interference when the hammer body 12 is working can be reduced, the vibration performance of the entire vibrator 1 can be improved, and the high-quality excitation of the controllable vibration source can be further ensured.

[0063] In one example, the control unit 2 can also be connected to the vibration source controller 4 to ensure that the control unit 2 can synchronously drive the first servo valve assembly 13 and the second servo valve assembly 14.

[0064] In one alternative implementation, refer to Figure 2 , Figure 2 A schematic diagram of the structure of a control unit according to an embodiment of this application is shown, as follows: Figure 2 As shown, the control unit 2 includes:

[0065] Displacement sensor 21 is connected to the first servo valve assembly 13 and the second servo valve assembly 14 respectively, and is configured to collect the first displacement information and the second displacement information;

[0066] The controller 22, connected to the displacement sensor 21, is configured to receive the first displacement information and the second displacement information, and to send the steering signal to the first servo valve assembly 13 and the second servo valve assembly 14 respectively when the first displacement information indicates that the first servo valve assembly 13 has moved to the first target limit position and the second displacement information indicates that the second servo valve assembly 14 has moved to the second target limit position.

[0067] In this embodiment of the application, the control unit 2 integrates a displacement sensor 21 and a controller 22. The displacement sensor 21 is used to collect displacement information of the first servo valve assembly 13 and the second servo valve assembly 14. Specifically, the displacement sensor 21 can be a potentiometer-type displacement sensor, an inductive displacement sensor, a Hall-effect displacement sensor, etc. Using the above-mentioned types of displacement sensors, the displacement information of the first servo valve assembly 13 and the second servo valve assembly 14 can be accurately measured and collected.

[0068] The controller 22 can be a programmable logic controller, a microcontroller, or a computer. After receiving the displacement information collected by the displacement sensor 21, the controller 22 can analyze and process the collected displacement information to determine whether the first servo valve assembly 13 has moved to the first target limit position and whether the second servo valve assembly 14 has moved to the second target limit position. If the first displacement information indicates that the first servo valve assembly 13 has moved to the first target limit position and the second displacement information indicates that the second servo valve assembly 14 has moved to the second target limit position, the controller 22 sends a steering signal to the first servo valve assembly 13 and the second servo valve assembly 14 respectively, thereby driving the first servo valve assembly 13 and the second servo valve assembly 14 to work. At the same time, a target force is applied to the hammer 12, causing the direction of movement of the hammer 12 on the piston rod to switch from the original first direction to the second direction, thereby realizing the reversal of the hammer 12.

[0069] In one alternative implementation, refer to Figure 3 , Figure 3 A schematic diagram of a controllable vibration source dual servo valve vibrator system according to an embodiment of this application is shown, as follows: Figure 3 As shown, the piston assembly 11 further includes a piston 112 disposed on the piston rod 111; the hammer body 12, the piston rod 111, and the piston 112 form a first chamber 15 and a second chamber 16.

[0070] The first servo valve assembly 13 includes: a first servo valve 131, and a first oil passage 132 and a second oil passage 133 formed in the hammer body 12. The first servo valve 131 is connected to the first chamber 15 through the first oil passage 132 and to the second chamber 16 through the second oil passage 133.

[0071] The second servo valve assembly 14 includes: a second servo valve 141, and a third oil passage 142 and a fourth oil passage 143 opened in the hammer body 12. The second servo valve 141 is connected to the first chamber 15 through the third oil passage 142 and to the second chamber 16 through the fourth oil passage 143. High-pressure hydraulic oil is present in both the first servo valve 131 and the second servo valve 141.

[0072] In this embodiment of the application, in order to ensure that the first servo valve assembly 13 and the second servo valve assembly 14 can apply force to the hammer body 12, the piston assembly 11 further includes a piston 112 disposed on the piston rod 111, and the hammer body 12, the piston rod 111, and the piston 112 form a first chamber 15 and a second chamber 16.

[0073] The first servo valve 131 in the first servo valve assembly 13 is connected to the first chamber 15 via the first oil passage 132 and to the second chamber 16 via the second oil passage 133; the second servo valve 141 in the second servo valve assembly 14 is connected to the first chamber 15 via the third oil passage 142 and to the second chamber 16 via the fourth oil passage 143.

[0074] Thus, when vibrator 1 is working, refer to Figure 4 , Figure 4 A top view schematic diagram of the vibrator described in an embodiment of this application is shown, as follows: Figure 4As shown, the high-pressure hydraulic fluid from the external hydraulic system inlet P supplies oil to the vibrator 1 through the first servo valve 131 and the second servo valve 141 symmetrically arranged on the hammer body 12. First, the high-pressure hydraulic fluid passes through the first servo valve 131 and the second servo valve 141 into the first oil passage 132 and the third oil passage 142, and then enters the first chamber 15 through the first oil passage 132 and the third oil passage 142. Since the piston rod 1 is fixed, the high-pressure hydraulic fluid can provide hydraulic force, i.e., target force, to the hammer body 12, pushing it, which is sleeved on the piston rod 111, towards the top of the vibrator, i.e., upward. At this time, the space in the second chamber 16 decreases due to the upward movement of the hammer body 12, causing the high-pressure hydraulic fluid in the second chamber 16 to be squeezed into the first servo valve 131 and the second servo valve 141 through the second oil passage 133 and the fourth oil passage 143, and then return to the return port T. Next, the control unit 2 can drive the first servo valve 131 and the second servo valve 141 to switch, allowing high-pressure oil to enter the second chamber 16 through the second oil passage 133 and the fourth oil passage 143. Since the piston rod 1 remains stationary, the high-pressure oil can provide hydraulic force, i.e., target force, to the hammer 12, pushing it, which is mounted on the piston rod 111, to move away from the top of the vibrator, i.e., downwards. At this time, the space in the first chamber 15 decreases due to the downward movement of the hammer 12. The high-pressure oil in the first chamber 15 is squeezed into the first servo valve 131 and the second servo valve 141 through the first oil passage 132 and the third oil passage 142, and then returns to the return port T. The first servo valve 131 and the second servo valve 141 then switch again, and the above process is repeated, causing the hammer 12 to vibrate up and down, exciting a high-quality controllable vibration source.

[0075] In this application, the dual servo valve structure not only enables the hammer to generate high-quality seismic waves, but also increases the flow rate of oil supply to the hammer 12 at low frequencies and expands the high-frequency performance of the hammer 12 at high frequencies.

[0076] In addition, refer to Figure 5 , Figure 5 A cross-sectional view of the piston chamber oil passage of a conventional piston vibrator hammer body is shown, such as... Figure 5 As shown, in a traditional piston vibrator, the oil supply passage and the oil return passage of the hammer body are not on the same plane in the direction of the piston through hole, and there is a distance Lv between them. This will generate a torque, which will accelerate the wear of the piston rod seal and affect the vibration performance of the entire vibrator.

[0077] In this embodiment, the first servo valve 131 and the second servo valve 141 are symmetrically arranged before and after the hammer body 12, and the first oil passage 132 and the third oil passage 142, the second oil passage 133 and the fourth oil passage 143 are also symmetrically arranged before and after the hammer body 12, which greatly reduces the horizontal interference of the hammer body 12, increases the vibration performance of the hammer body 12, and further ensures the high-quality excitation of the controllable vibration source.

[0078] In an optional embodiment, the control unit 2, connected to the first servo valve 131 and the second servo valve 141, is configured to send a first steering signal to the first servo valve 131 and the second servo valve 141 respectively when the first displacement information indicates that the first servo valve assembly 13 has moved to the first target limit position and the second displacement information indicates that the second servo valve assembly 14 has moved to the second target limit position.

[0079] The first servo valve 131 is configured to supply oil to the first chamber 15 through the first oil passage 132 in response to the first steering signal, and the second chamber 16 is configured to return oil to the first servo valve 131 through the second oil passage 133, so as to apply a first target force to the hammer 12.

[0080] The second servo valve 141 is configured to supply oil to the first chamber 15 through the third oil passage 142 in response to the first steering signal, and the second chamber 16 is configured to return oil to the second servo valve 141 through the fourth oil passage 143 to apply the first target force to the hammer body 12.

[0081] The hammer 12 is configured to move along the piston rod 111 toward the top of the vibrator 1 in response to the first target force.

[0082] In this embodiment, the first target limit position and the second target limit position are the extreme working positions near the bottom of the vibrator 1, and correspondingly, the hammer 12 is located at the second working limit position. At this time, the control unit 2 sends a first steering signal to the first servo valve 131 and the second servo valve 141 respectively.

[0083] In this process, the first servo valve 131 responds to the first steering signal and supplies oil to the first chamber 15 through the first oil passage 132, so that the high-pressure hydraulic oil can provide hydraulic force to the hammer body 12, i.e., the first target force; at the same time, the second servo valve 141 responds to the first steering signal and supplies oil to the first chamber 15 through the third oil passage 142, so that the high-pressure hydraulic oil can provide hydraulic force to the hammer body 12, i.e., the first target force. In this way, the hammer body 12 responds to the first target force and moves towards the top of the vibrator 1, i.e., moves upward.

[0084] Next, the space in the second chamber 16 will decrease due to the upward movement of the hammer 12, so that the high-pressure oil in the second chamber 16 will be squeezed into the first servo valve 131 and the second servo valve 141 through the second oil passage 133 and the fourth oil passage 143, and then returned to the return port T.

[0085] Thus, the control unit 2 enables synchronous control of the first servo valve 131 and the second servo valve 141, thereby achieving the normal upward movement of the hammer 12.

[0086] In an optional implementation, the control unit 2 is further configured to send a second steering signal to the first servo valve 131 and the second servo valve 141 when the first displacement information indicates that the first servo valve assembly 13 has moved to the first target limit position and the second displacement information indicates that the second servo valve assembly 14 has moved to the second target limit position.

[0087] The first servo valve 131 is configured to supply oil to the second chamber 16 through the second oil passage 133 in response to the second steering signal, so as to apply a second target force to the hammer 12; the first chamber 15 is configured to return oil to the first servo valve 131 through the first oil passage 132.

[0088] The second servo valve 141 is configured to supply oil to the second chamber 16 through the fourth oil passage 143 in response to the second steering signal, so as to apply the second target force to the hammer 12; the first chamber 15 is configured to return oil to the second servo valve 141 through the third oil passage 142.

[0089] The hammer 12 is configured to move along the piston rod 111 in a direction away from the top of the vibrator 1 in response to the second target force.

[0090] In this embodiment, the first target limit position and the second target limit position are the extreme working positions near the top of the vibrator 1, and correspondingly, the hammer 12 is located at the first working limit position. At this time, the control unit 2 sends a second steering signal to the first servo valve 131 and the second servo valve 141 respectively.

[0091] In this configuration, the first servo valve 131 responds to the second steering signal and supplies oil to the second chamber 16 through the second oil passage 133, so that the high-pressure hydraulic oil can provide hydraulic force to the hammer body 12, i.e., the second target force. At the same time, the second servo valve 141 responds to the second steering signal and supplies oil to the second chamber 16 through the fourth oil passage 143, so that the high-pressure hydraulic oil can provide hydraulic force to the hammer body 12, i.e., the second target force. In this way, the hammer body 12 responds to the second target force and moves away from the top of the vibrator 1, i.e., moves downward.

[0092] Next, the space in the first chamber 15 will decrease due to the downward movement of the hammer body 12, so that the high-pressure oil in the first chamber 15 will be squeezed into the first servo valve 131 and the second servo valve 141 through the first oil passage 132 and the third oil passage 142, and then returned to the return port T.

[0093] Thus, the control unit 2 enables synchronous control of the first servo valve 131 and the second servo valve 141, thereby achieving the normal downward movement of the hammer 12.

[0094] The direction of the first target force is opposite to the direction of the second target force.

[0095] Thus, the control unit 2 enables synchronous control of the first servo valve 131 and the second servo valve 141, allowing the first servo valve 131 and the second servo valve 141 to switch synchronously, thereby achieving normal vibration of the hammer body 12 and ensuring high-quality excitation of the controllable vibration source.

[0096] In one alternative implementation, such as Figure 3 As shown, the first oil passage 132 and the third oil passage 142 are in a straight line through the first chamber 15;

[0097] The second oil passage 133 and the fourth oil passage 143 are in a straight line through the second chamber 16.

[0098] like Figure 5 As shown, in the traditional piston vibrator hammer body, the oil passage 3 of the hammer body 12 of the traditional piston vibrator is Z-shaped. When machining this oil passage, two process holes need to be drilled on the hammer body 12, which is complicated to machine, with many corners and a long distance. When the high-pressure hydraulic oil flows in this oil passage 3, it is easy to generate local resistance.

[0099] Therefore, in this embodiment, the first oil passage 132 and the third oil passage 142 are linearly connected to the first chamber 15, and the second oil passage 133 and the fourth oil passage 143 are linearly connected to the second chamber 16. This simplifies the processing of the oil passages, reduces the number of bends and the distance between them, and decreases the local resistance generated when the high-pressure hydraulic oil flows in the oil passages.

[0100] In one alternative implementation, such as Figure 3 As shown, the vibrator 1 also includes an accumulator 17, which is connected to the first servo valve 131 and the second servo valve 141 and is configured to supply the high-pressure hydraulic oil to the first servo valve 131 and the second servo valve 141.

[0101] In this embodiment, the accumulator 17 is connected to the oil inlet P of the external hydraulic system and installed near the first servo valve 131 and the second servo valve 141. It inputs the high-pressure hydraulic oil output from the external hydraulic system into the first servo valve 131 and the second servo valve 141 to eliminate hydraulic pulsation of the external hydraulic system and improve vibration harmonics.

[0102] In one example, the accumulator 17 can also be connected to the return port T, which further eliminates hydraulic pulsation in the external hydraulic system and improves vibration harmonics.

[0103] In one example, to minimize hydraulic pulsation from the external hydraulic system, the accumulator 17 may include four, with two accumulators 17 corresponding to each servo valve. Of the two accumulators 17, one is connected to the inlet port P of the external hydraulic system, and the other is connected to the return port T.

[0104] In one alternative implementation, such as Figure 3 As shown, the piston assembly 11 further includes a sleeve 113 sleeved on the piston rod 111, the sleeve 113 being slidably connected to the piston rod 111, and the hammer body 12 being fixedly sleeved outside the sleeve 113.

[0105] In this embodiment, by sleeve 113 fitted onto piston rod 111, hammer 12 is fixedly fitted onto sleeve 113. Thus, hammer 12, piston rod 111, piston 112, and sleeve 113 form a first chamber 15 and a second chamber 16. When the first servo valve 131 and the second servo valve 141 supply oil to the first chamber 15 or the second chamber 16, a hydraulic force can be generated, causing sleeve 113 to move on piston rod 111, thereby driving hammer 12 fixed on sleeve 113 to move.

[0106] In one alternative implementation, such as Figure 3 As shown, the vibrator 1 also includes an end cap 18, which is configured to press the sleeve 113 between the piston rod 111 and the hammer body 12.

[0107] In this embodiment of the application, the vibrator 1 further includes an end cap 18, which presses the sleeve 113 tightly between the piston rod 111 and the hammer body 12, thereby forming a sealed first chamber 15 and a second chamber 16.

[0108] In one alternative embodiment, the piston 112 is located in the middle of the piston rod 111, and the first chamber 15 and the second chamber 16 are equal in size and volume.

[0109] In this embodiment, the piston 112 is positioned in the middle of the piston rod 111, so that the size and volume of the first chamber 15 and the second chamber 16 are equal, further ensuring the synchronous operation of the first servo valve 131 and the second servo valve 141.

[0110] It should be noted that the servo valve, accumulator, etc. provided in the embodiments of this application can be any suitable existing structure.

[0111] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0112] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0113] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0114] It should also be noted that, in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor should they be construed as indicating or implying relative importance. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. In the absence of further restrictions, an element defined by the phrase "includes a..." does not preclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.

[0115] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand this application, and the content of this specification should not be construed as a limitation of this application. Furthermore, for those skilled in the art, there will be different forms of changes in the specific implementation methods and application scope based on this application. It is neither necessary nor possible to exhaustively list all implementation methods here, and obvious changes or modifications derived therefrom are still within the protection scope of this application.

Claims

1. A controllable vibration source dual servo valve vibrator system, characterized in that, include: The vibrator and the control unit connected to the vibrator; The vibrator includes: Piston assembly, including piston rod; The hammer body is sleeved on the piston rod and slidably connected to the piston rod; A first servo valve assembly and a second servo valve assembly are symmetrically arranged on the hammer body. Both the first servo valve assembly and the second servo valve assembly are configured to provide a force to the hammer body so that the hammer body moves along the longitudinal direction of the piston rod. A control unit, connected to the first servo valve assembly and the second servo valve assembly, is configured to acquire first displacement information of the first servo valve assembly and second displacement information of the second servo valve assembly, and to send steering signals to the first servo valve assembly and the second servo valve assembly respectively when the first displacement information indicates that the first servo valve assembly has moved to a first target limit position and the second displacement information indicates that the second servo valve assembly has moved to a second target limit position; wherein the first target limit position and the second target limit position are at the same horizontal height; Both the first servo valve assembly and the second servo valve assembly are configured to apply a target force to the hammer body in response to the steering signal, so as to switch the direction of movement of the hammer body on the piston rod from the original first direction to the second direction.

2. The controllable vibration source dual servo valve vibrator system according to claim 1, characterized in that, The control unit includes: A displacement sensor is connected to the first servo valve assembly and the second servo valve assembly respectively, and is configured to collect the first displacement information and the second displacement information; The controller, connected to the displacement sensor, is configured to receive the first displacement information and the second displacement information, and to send the steering signal to the first servo valve assembly and the second servo valve assembly respectively when the first displacement information indicates that the first servo valve assembly has moved to the first target limit position and the second displacement information indicates that the second servo valve assembly has moved to the second target limit position.

3. The controllable vibration source dual servo valve vibrator system according to claim 1, characterized in that, The piston assembly further includes a piston disposed on the piston rod; the hammer body, the piston rod, and the piston form a first chamber and a second chamber; The first servo valve assembly includes: a first servo valve, and a first oil passage and a second oil passage formed in the hammer body. The first servo valve is connected to the first chamber through the first oil passage and to the second chamber through the second oil passage. The second servo valve assembly includes: a second servo valve, and a third oil passage and a fourth oil passage formed in the hammer body. The second servo valve is connected to the first chamber through the third oil passage and to the second chamber through the fourth oil passage. High-pressure hydraulic oil is present in both the first servo valve and the second servo valve.

4. The controllable vibration source dual servo valve vibrator system according to claim 3, characterized in that, The control unit, connected to the first servo valve and the second servo valve, is configured to send a first steering signal to the first servo valve and the second servo valve respectively when the first displacement information indicates that the first servo valve assembly has moved to the first target limit position and the second displacement information indicates that the second servo valve assembly has moved to the second target limit position. The first servo valve is configured to supply oil to the first chamber through the first oil passage in response to the first steering signal, so as to apply a first target force to the hammer body; The second chamber is configured to return oil to the first servo valve through the second oil passage; The second servo valve is configured to supply oil to the first chamber through a third oil passage in response to the first steering signal, so as to apply the first target force to the hammer body; The second chamber is configured to return oil to the second servo valve through the fourth oil passage; The hammer is configured to move along the piston rod toward the top of the vibrator in response to the first target force.

5. A controllable vibration source dual servo valve vibrator system according to claim 3, characterized in that, The control unit is also configured to send a second steering signal to the first servo valve and the second servo valve respectively when the first displacement information indicates that the first servo valve assembly has moved to the first target limit position and the second displacement information indicates that the second servo valve assembly has moved to the second target limit position; The first servo valve is configured to supply oil to the second chamber through the second oil passage in response to the second steering signal, so as to apply a second target force to the hammer body; The first chamber is configured to return oil to the first servo valve through the first oil passage; The second servo valve is configured to supply oil to the second chamber through the fourth oil passage in response to the second steering signal, so as to apply the second target force to the hammer; the first chamber is configured to return oil to the second servo valve through the third oil passage; The hammer is configured to move along the piston rod away from the top of the vibrator in response to the second target force.

6. A controllable vibration source dual servo valve vibrator system according to any one of claims 3-5, characterized in that, The first oil passage and the third oil passage are in a straight line through the first chamber; The second oil passage and the fourth oil passage are in a straight line through the second chamber.

7. A controllable vibration source dual servo valve vibrator system according to claim 3, characterized in that, The vibrator also includes an accumulator, which is connected to the first servo valve and the second servo valve and is configured to supply the high-pressure hydraulic oil to the first servo valve and the second servo valve.

8. A controllable vibration source dual servo valve vibrator system according to claim 1, characterized in that, The piston assembly also includes a sleeve fitted on the piston rod, the sleeve being slidably connected to the piston rod, and the hammer being fixedly fitted outside the sleeve.

9. A controllable vibration source dual servo valve vibrator system according to claim 8, characterized in that, The vibrator also includes an end cap configured to press the sleeve tightly between the piston rod and the hammer.

10. A controllable vibration source dual servo valve vibrator system according to claim 3, characterized in that, The piston is located in the middle of the piston rod, and the first chamber and the second chamber are equal in size and volume.

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