Limiting stopper and vibrator

Abstract

The utility model discloses a limiter and a vibrator, and relates to the technical field of petroleum seismic exploration. The limiting device comprises a limiting angle plate and at least one friction piece, the limiting angle plate is provided with a first sub-plate and a second sub-plate, the first sub-plate and the second sub-plate are connected and form a preset included angle, the first sub-plate is used for being connected with a hammer body of the vibrator, the second sub-plate is opposite to a flat plate stand column of the vibrator, and the friction piece is located on the side, close to the flat plate stand column, of the second sub-plate. And the second sub-board is connected. When the hammer body has a rotating trend, the friction piece can abut against the flat plate stand column in time, the flat plate stand column serves as a stress face, the rotating amount of the hammer body is effectively reduced, then the distortion degree of seismic wave vibration signals is reduced, and the accuracy and reliability of the vibroseis in a seismic exploration project are improved.

Description

Technical Field

[0001] This disclosure relates to the field of petroleum seismic exploration technology, and in particular to a limiter and a vibrator. Background Technology

[0002] In the field of seismic exploration for oil and natural gas, controllable seismic sources, which have the characteristics of controllable excitation energy, controllable excitation frequency, high construction efficiency, and green environmental protection, have been widely used as excitation sources for artificial seismic signals.

[0003] In related technologies, the core component of a controllable vibration source is the vibrator. During normal construction, the hammer of the vibrator moves in a reciprocating linear motion. As the vibration frequency increases, the rotational torque on the hammer gradually increases, which in turn causes the hammer to rotate to a certain extent.

[0004] The rotation of the hammer increases the distortion of seismic wave vibration signals, affecting the accuracy and reliability of controllable sources in seismic exploration projects. Utility Model Content

[0005] This disclosure provides a limiter and a vibrator, which can solve the aforementioned technical problems existing in related technologies. The technical solution is as follows:

[0006] In a first aspect, a limiter is provided, the limiter comprising a limit angle plate and at least one friction element;

[0007] The limiting angle plate includes a first sub-plate and a second sub-plate. The first sub-plate and the second sub-plate are connected and form a preset angle. The first sub-plate is used to connect with the hammer body of the vibrator, and the second sub-plate is opposite to the flat column of the vibrator.

[0008] The friction element is located on the side of the second sub-plate near the flat plate column and is connected to the second sub-plate.

[0009] In some possible implementations, the limiter further includes a reinforcing member connected to the first sub-plate and the second sub-plate, respectively.

[0010] In some possible implementations, the first sub-plate has a first through hole, and the limiter further includes a first bolt that passes through the first through hole and is used to connect to the hammer body.

[0011] In some possible implementations, the first through hole is a threaded hole, and the thread of the first through hole is adapted to the thread of the first bolt.

[0012] In some possible implementations, there are multiple first through holes, which are spaced apart along the extension direction of the connection line between the first sub-board and the second sub-board.

[0013] In some possible implementations, the plurality of first through holes are of the same size.

[0014] In some possible implementations, the second sub-plate has a second through hole, and the limiter further includes a second bolt and a pressure strip, the second bolt passing through the second through hole and the friction element and being connected to the pressure strip.

[0015] In some possible implementations, the second through hole is a threaded hole, and the thread of the second through hole is adapted to the thread of the second bolt.

[0016] In some possible implementations, there are multiple friction elements, each of which corresponds to at least one second through hole and at least one second bolt.

[0017] In a second aspect, a vibrator is provided, the vibrator comprising the limiter described in any one of the first aspects.

[0018] The beneficial effects of the technical solution provided in this disclosure include at least the following:

[0019] In this disclosure, the first sub-plate is connected to the hammer body, and the second sub-plate is connected to the friction element. When the hammer body has a tendency to rotate, the friction element can promptly abut against the flat plate column, using the flat plate column as the force-bearing surface, effectively reducing the rotation of the hammer body, thereby reducing the distortion of the seismic wave vibration signal and improving the accuracy and reliability of the controllable source in seismic exploration projects.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a limiter provided in an embodiment of this disclosure.

[0023] Figure 2 This is an assembly diagram of a limiter and a vibrator provided in an embodiment of this disclosure.

[0024] Figure 3 This is an exploded view of a limiter provided in an embodiment of this disclosure.

[0025] Figure 4 This is a partial schematic diagram of a limiter provided in an embodiment of this disclosure.

[0026] Figure 5 This is an exploded view of a limiter provided in an embodiment of this disclosure.

[0027] Figure label:

[0028] 1. Limiting angle plate;

[0029] 11. First sub-plate; 11a. First through hole; 12. Second sub-plate; 12a. Second through hole;

[0030] 2. Friction component; 2a. Third through hole;

[0031] 3. Reinforcing component; 4. First bolt; 5. Second bolt;

[0032] 6. Pressure strip; 6a. Fourth through hole;

[0033] 100. Vibrator; 101. Hammer body; 102. Flat plate column; 103. Central piston rod; 104. Flat plate.

[0034] The accompanying drawings have illustrated specific embodiments of this disclosure, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this disclosure to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0036] In related technologies, refer to Figure 2 As shown, the vibrator 100 has a hammer body 101, a flat column 102, a central piston rod 103, and a flat plate 104. The working principle of the vibrator 100 is as follows:

[0037] The flat plate column 102 is an important supporting structure for the flat plate 104. It ensures that the flat plate 104 can be placed stably on the ground and maintain close contact with the ground. The central piston rod 103 drives the hammer 101 to move through a preset method (e.g., hydraulic). Under the drive of the central piston rod 103, the hammer 101 can reciprocate linearly along the axial extension direction of the central piston rod 103. The reaction force generated by this reciprocating linear motion pushes the flat plate 104 downward to generate vibration force. The vibration force then acts on the ground to generate seismic waves, thereby realizing the conversion of the mechanical energy of the hammer 101 into seismic wave energy.

[0038] When the vibrator 100 first starts working, the vibration frequency of the hammer 101 is relatively low. As time gradually increases, the vibration frequency of the hammer 101 also gradually increases, reaching a maximum of about 100Hz. As the vibration frequency increases, the rotational torque on the hammer 101 increases, which in turn causes the hammer 101 to rotate about the central piston rod 103 as an axis.

[0039] Thus, on the one hand, the rotation of the hammer 101 will increase the distortion of the seismic wave vibration signal, affecting the accuracy and reliability of the controllable source in the seismic exploration project, and affecting the construction quality and efficiency of the field seismic exploration project. On the other hand, the rotation of the hammer 101 will cause the hammer 101 to rub violently against the flat column 102, resulting in damage to the mechanical parts.

[0040] In a first aspect, embodiments of this disclosure provide a limiter, referring to... Figure 1 As shown, the limiter includes a limit angle plate 1 and at least one friction element 2.

[0041] The limiting angle plate 1 includes a first sub-plate 11 and a second sub-plate 12, which are connected and form a preset angle. The first sub-plate 11 is used to connect to the hammer body 101 of the vibrator 100, and the second sub-plate 12 is opposite to the flat column 102 of the vibrator 100. The friction element 2 is located on the side of the second sub-plate 12 near the flat column 102 and is connected to the second sub-plate 12.

[0042] This disclosure does not specifically limit the materials of the first sub-board 11 and the second sub-board 12, but can match and set them according to the strength requirements of the connection between the first sub-board 11, the second sub-board 12 and other components, manufacturing costs and other factors.

[0043] For example, the first sub-board 11 and the second sub-board 12 can be components made of metal (steel, aluminum alloy, etc.). Metal has the characteristics of high strength, wear resistance, and corrosion resistance, and can operate stably in high-load and high-speed environments. At the same time, metal also has good machinability and can be precisely processed by drilling, cutting, turning, etc., to meet the needs of different equipment and machinery.

[0044] As another example, the first sub-plate 11 and the second sub-plate 12 can also be components made of plastic (polyamide, polytetrafluoroethylene, polypropylene, etc.). Plastic has good wear resistance and self-lubricating properties, which can reduce friction and improve service life. At the same time, plastic also has the advantages of being lightweight, low cost, and easy to mold.

[0045] In some embodiments, the first sub-plate 11 and the second sub-plate 12 are integrally formed as a limiting angle plate 1. This integrally formed limiting angle plate 1 structure effectively reduces the gaps formed at the connection between the first sub-plate 11 and the second sub-plate 12, improving the overall stability and strength of the limiting angle plate 1 structure.

[0046] In other embodiments, the first sub-board 11 and the second sub-board 12 are processed separately and then connected using appropriate connection processes. This disclosure does not specifically limit the connection process of the first sub-board 11 and the second sub-board 12. Detachable connection methods such as threaded fastening or snap-fit ​​connection can be used, or non-detachable connection methods such as adhesive application or welding can be used. The specific connection process can be matched and set according to factors such as the connection strength requirements, connection cost, and connection speed of the first sub-board 11 and the second sub-board 12.

[0047] This disclosure does not specifically limit the preset included angle between the first sub-plate 11 and the second sub-plate 12. It can be matched and set according to the included angle between the hammer body 101 and the flat column 102 in the vibrator 100, so as to satisfy that when the first sub-plate 11 is connected to the hammer body 101, the second sub-plate 12 is opposite to and parallel to the flat column 102.

[0048] The friction element 2 can prevent the second sub-plate 12 from directly rubbing against the flat column 102, which would cause the limiting angle plate 1 to need to be replaced frequently. Since there is a connection between the limiting angle plate 1 and the hammer body 101, and the limiting angle plate 1 uses a lot of material and has a high cost, the friction element 2 is used to buffer wear. On the one hand, it can avoid the frequent disassembly and replacement of the limiting angle plate 1, and on the other hand, it can reduce the wear cost during the use of the limiter.

[0049] This disclosure does not specifically limit the material of the friction component 2, and it can be matched and set according to factors such as the target replacement frequency of the friction component 2 and the manufacturing cost. For example, the friction component 2 can be made of materials with high wear resistance such as alloy steel, nylon (also known as polyamide fiber, PA), and alumina ceramic. This can reduce the replacement frequency of the friction component 2 and help reduce the replacement work of the user.

[0050] Using the limiter disclosed herein, the first sub-plate 11 is connected to the hammer body 101, and the second sub-plate 12 is connected to the friction element 2. When the hammer body 101 has a tendency to rotate, the friction element 2 can promptly abut against the flat column 102, using the flat column 102 as the force-bearing surface, effectively reducing the rotation of the hammer body 101, thereby reducing the distortion of the seismic wave vibration signal and improving the accuracy and reliability of the controllable source in seismic exploration projects.

[0051] In some embodiments, refer to Figure 1As shown, the limiter also includes a reinforcing member 3, which is connected to the first sub-plate 11 and the second sub-plate 12 respectively. The reinforcing member 3 can effectively improve the bearing capacity between the first sub-plate 11 and the second sub-plate 12, and reduce the risk of deformation, breakage and other adverse phenomena caused by the first sub-plate 11 and the second sub-plate 12 under stress.

[0052] Meanwhile, the reinforcement 3 can avoid increasing the wall thickness of the first sub-plate 11 and the second sub-plate 12 due to strength requirements, thereby saving material usage, reducing the weight of the limiting angle plate 1 and reducing costs.

[0053] This disclosure does not specifically limit the shape of the reinforcing member 3, and it can be matched and set according to the shape, size and other parameters of the first sub-plate 11 and the second sub-plate 12. For example, the reinforcing member 3 can be a strip structure, a grid structure or a variable cross-section structure.

[0054] The reinforcing member 3 can be integrally formed with the first sub-plate 11 and the second sub-plate 12, or it can be connected by a detachable connection method such as threaded fastening or snap-fit ​​connection, or by a non-detachable connection method such as glue application or welding. The specific connection method can be matched and set according to factors such as the materials of the first sub-plate 11, the second sub-plate 12 and the reinforcing member 3, and the connection strength requirements of the reinforcing member 3 with the first sub-plate 11 and the second sub-plate 12 respectively.

[0055] In some embodiments, refer to Figure 3 As shown, the first sub-plate 11 has a first through hole 11a, and the limiter also includes a first bolt 4, which passes through the first through hole 11a and is used to connect to the hammer body 101. Bolted connections are characterized by high strength. The hammer body 101 is relatively heavy and operates in a reciprocating linear motion. The connection between the first sub-plate 11 and the hammer body 101 requires high strength and has a relatively concentrated stress distribution. Therefore, bolted connections are suitable for the connection between the first sub-plate 11 and the hammer body 101.

[0056] Meanwhile, bolted connections are highly reliable and have a long service life, which can prevent the first sub-plate 11 from falling off from the hammer body 101 and endangering the personal safety of users around the vibrator 100. They can also reduce the maintenance cost and replacement frequency of the limit switch.

[0057] In some embodiments, refer to Figure 4 As shown, the first through hole 11a is a threaded hole, and the thread of the first through hole 11a is adapted to the thread of the first bolt 4. The first through hole 11a and the first bolt 4 are engaged by the thread to form a high-strength connection. This connection method can withstand greater tensile and compressive forces, further improving the connection strength between the first sub-plate 11 and the hammer body 101.

[0058] Meanwhile, the threaded hole has the characteristic of strong anti-loosening ability. Since the hammer body 101 is in a high-frequency vibration state when it is working, the connection between the first sub-plate 11 and the hammer body 101 is easy to loosen, which may cause the limiter to fall off and endanger the personal safety of users around the vibrator 100. The threaded connection can effectively resist the influence of external vibration and impact through the interlocking action of the thread, and prevent the connection between the first sub-plate 11 and the hammer body 101 from loosening.

[0059] In some embodiments, refer to Figure 3 As shown, there are multiple first through holes 11a, which are distributed at intervals along the extension direction of the connecting line between the first sub-plate 11 and the second sub-plate 12. The uniformly spaced first through holes 11a can effectively disperse the stress on the first sub-plate 11, avoid stress concentration in the area around a certain first through hole 11a, and thus reduce the occurrence of defects such as deformation and cracks in the first sub-plate 11.

[0060] In some embodiments, the multiple first through holes 11a are of the same size. In this way, on the one hand, the first through holes 11a of the same size are convenient for the processing of the first sub-plate 11 and improve the processing efficiency of the first sub-plate 11; on the other hand, the first through holes 11a of the same size can correspond to the first bolts 4 of the same size, thereby reducing procurement costs and simplifying the production line process.

[0061] In some embodiments, refer to Figure 3 As shown, the second sub-plate 12 has a second through hole 12a, and the limiter also includes a second bolt 5 and a pressure strip 6. The second bolt 5 passes through the second through hole 12a and the friction member 2, and is connected to the pressure strip 6.

[0062] The friction element 2 has a third through hole 2a corresponding to the second through hole 12a, and the pressure strip 6 has a fourth through hole 6a corresponding to the second through hole 12a. Thus, the second bolt 5 passes through the second through hole 12a, the third through hole 2a and the fourth through hole 6a in sequence to achieve a fastening connection.

[0063] Bolted connections have the characteristic of high strength. When the vibrator 100 is working, the second sub-plate 12 and the friction element 2 vibrate at high frequency with the hammer body 101. At the same time, the friction element 2 may also come into contact with the flat column 102 and rub against it. Therefore, the friction element 2 is subjected to a large load and the connection requires high strength. Therefore, bolted connections are suitable for the connection between the second sub-plate 12 and the friction element 2.

[0064] The pressure strip 6 is also used to accommodate nuts and other components that mate with the second bolt 5, preventing the nuts and other components from directly facing the flat column 102 and reducing the collision or squeezing between the nuts and other components and the flat column 102.

[0065] In some embodiments, refer to Figure 3 and Figure 4As shown, the second through hole 12a is a threaded hole, and the thread of the second through hole 12a is adapted to the thread of the second bolt 5. The third through hole 2a and the fourth through hole 6a can also have threads adapted to the thread of the second bolt 5 (not shown in the attached figure). The second through hole 12a, through the threaded engagement with the second bolt 5, can form a high-strength connection. This connection method can withstand greater tensile and compressive forces, further improving the connection strength between the second sub-plate 12 and the friction element 2.

[0066] Meanwhile, the threaded hole has the characteristic of strong anti-loosening ability. As the second sub-plate 12 and the friction element 2 vibrate at high frequency with the hammer body 101, the connection between the second sub-plate 12 and the friction element 2 is prone to loosening, which may cause the friction element 2 to fall off and endanger the personal safety of users around the vibrator 100. However, the threaded connection can effectively resist the influence of external vibration and impact through the interlocking action of the threads, and prevent the connection between the second sub-plate 12 and the friction element 2 from loosening.

[0067] In some embodiments, refer to Figure 5 As shown, there are multiple friction elements 2, and each friction element 2 corresponds to at least one second through hole 12a and at least one second bolt 5.

[0068] Multiple friction components 2 can be friction plates with different thicknesses, materials, shapes, and other parameters. This allows for the matching of friction plates with different parameters based on the varying rotational torque experienced at different locations on the hammer body 101. For example, if the rotational torque is higher in the first region of the hammer body 101 and lower in the second region, a friction component 2 with a thicker thickness and higher wear resistance can be placed on the second sub-plate 12 corresponding to the first region, while a friction component 2 with a thinner thickness and lower wear resistance can be placed on the second sub-plate 12 corresponding to the second region. This avoids the need to replace multiple friction components 2 simultaneously; instead, each friction component 2 can be replaced according to its specific degree of damage.

[0069] Secondly, embodiments of this disclosure also provide a vibrator 100, which may include the limiter mentioned in any of the above.

[0070] The vibrator 100 has a hammer body 101, a flat column 102, a central piston rod 103, and a flat plate 104. The flat plate 104 is opposite to the ground, and the flat column 102 is connected to the flat plate 104. The flat column 102 is an important support structure for the flat plate 104, ensuring that the flat plate 104 can be stably placed on the ground and maintain close contact with the ground. The central piston rod 103 is slidably connected to the hammer body 101 and can drive the hammer body 101 to move through a preset method (e.g., hydraulic). Under the drive of the central piston rod 103, the hammer body 101 can reciprocate linearly along the axial extension direction of the central piston rod 103. The reaction force generated by this reciprocating linear motion pushes the flat plate 104 downward to generate a vibration force. The vibration force then acts on the ground to generate seismic waves, thereby realizing the conversion of the mechanical energy of the hammer body 101 into seismic wave energy.

[0071] The first sub-plate 11 is connected to the hammer body 101, the second sub-plate 12 is opposite to the flat plate column 102, and the friction element 2 is located on the side of the second sub-plate 12 close to the flat plate column 102 and is connected to the second sub-plate 12.

[0072] When the vibrator 100 first starts working, the vibration frequency of the hammer 101 is relatively low. As time gradually increases, the vibration frequency of the hammer 101 also gradually increases, reaching a maximum of about 100Hz. As the vibration frequency increases, the rotational torque on the hammer 101 increases, which in turn causes the hammer 101 to rotate about the central piston rod 103 as an axis.

[0073] When the hammer 101 has a tendency to rotate, the hammer 101 will drive the limiter and friction element 2 to rotate together. There is a small gap between the friction element 2 and the flat column 102. In this way, after the hammer 101 rotates a small displacement, the friction element 2 can abut against the flat column 102, using the flat column 102 as the force-bearing surface to block the continued rotation of the hammer 101, thereby reducing the distortion of the seismic wave vibration signal and improving the accuracy and reliability of the controllable source in seismic exploration projects.

[0074] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] It is understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0076] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0077] It is further understood that the terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment 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.

[0078] It is further understood that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the two components; they can refer to a direct connection between two components without the presence of other components, or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0079] It is further understood that although operations are described in a specific order in the accompanying drawings in the embodiments of this disclosure, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0080] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the solutions disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the scope of the claims.

[0081] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A limiter, characterized in that, The limiter includes a limiting angle plate (1) and at least one friction element (2); The limiting angle plate (1) includes a first sub-plate (11) and a second sub-plate (12). The first sub-plate (11) and the second sub-plate (12) are connected and form a preset angle. The first sub-plate (11) is used to connect with the hammer body of the vibrator, and the second sub-plate (12) is opposite to the flat column of the vibrator. The friction element (2) is located on the side of the second sub-plate (12) near the flat plate column and is connected to the second sub-plate (12).

2. The limiter according to claim 1, characterized in that, The limiter also includes a reinforcing member (3), which is connected to the first sub-plate (11) and the second sub-plate (12) respectively.

3. The limiter according to claim 1, characterized in that, The first sub-plate (11) has a first through hole (11a), and the limiter further includes a first bolt (4) which passes through the first through hole (11a) and is used to connect to the hammer body.

4. The limiter according to claim 3, characterized in that, The first through hole (11a) is a threaded hole, and the thread of the first through hole (11a) is adapted to the thread of the first bolt (4).

5. The limiter according to claim 3, characterized in that, There are multiple first through holes (11a), and the multiple first through holes (11a) are distributed at intervals along the extension direction of the connecting line between the first sub-plate (11) and the second sub-plate (12).

6. The limiter according to claim 5, characterized in that, The multiple first through holes (11a) are of the same size.

7. The limiter according to claim 1, characterized in that, The second sub-plate (12) has a second through hole (12a), and the limiter further includes a second bolt (5) and a pressure strip (6), the second bolt (5) passing through the second through hole (12a) and the friction member (2) and being connected to the pressure strip (6).

8. The limiter according to claim 7, characterized in that, The second through hole (12a) is a threaded hole, and the thread of the second through hole (12a) is adapted to the thread of the second bolt (5).

9. The limiter according to claim 7, characterized in that, The number of friction elements (2) is multiple, and each friction element (2) corresponds to at least one second through hole (12a) and at least one second bolt (5).

10. A vibrator, characterized in that, The vibrator includes a limiter as described in any one of claims 1-9.

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