Multi-dimensional positioning and damping device of deepwater hydraulic pile hammer power station

Abstract

The invention discloses a multi-dimensional positioning and damping device of a deepwater hydraulic pile hammer power station, and relates to the technical field of deepwater hydraulic piling, the multi-dimensional positioning and damping device comprises a power station, the power station is in a hollow cylinder shape, a positioning and damping cylinder is installed in the power station, and a pile hammer body middle cylinder is sleeved with the positioning and damping cylinder; a lower vertical supporting ring is installed at the bottom of the cylinder in the hammer body of the pile hammer and located below the power station. According to the device, the vertical direction positioning shock absorber, the circumferential direction positioning shock absorber and the radial positioning shock absorber are arranged, the six degrees of freedom of the positioning shock absorption cylinder relative to the middle cylinder body of the hammer body of the pile hammer in a space rectangular coordinate system are restrained in an all-around mode, and meanwhile the positioning shock absorption cylinder is allowed to move slightly in the middle cylinder body of the hammer body of the pile hammer; the impact of impact vibration of the pile hammer on a power station and other parts is reduced, the reliability of the deepwater hydraulic pile hammer is improved, and the service life of the deepwater hydraulic pile hammer is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of deepwater hydraulic piling, and in particular to a multi-dimensional positioning shock absorbing device for a deepwater hydraulic piling hammer power station. Background Art

[0002] Deepwater pile hammer is a heavy equipment specially used in marine engineering. It is a kind of deep-sea resource development technology. It implants piles on the seabed and lake bottom at a water depth of more than 400 meters, and strikes and sinks steel piles for pile foundation construction of underwater engineering facilities.

[0003] The defects of the existing positioning and shock absorbing device are: 1. Patent document CN107724390B discloses a hydraulic pile hammer, which mainly considers how to reduce the resistance during impact and prevent the hammer core and hammer body from being worn, but does not consider how to constrain in all directions, thereby improving the reliability and service life of the deepwater pile hammer; 2. Patent document CN111058444B discloses a piling force adjustment device and a hydraulic piling hammer, which mainly considers how to adjust the piling force of the hydraulic piling hammer to increase the service life of the hydraulic piling hammer, but does not consider how to cause the eccentric load of the shock absorbing element due to weight imbalance; 3. Patent document CN109458363B discloses a hydraulic pile hammer, which mainly considers how to achieve rapid reversal of the lifting hammer and the dropping hammer, but does not consider further reducing the impact vibration of the pile hammer through secondary shock absorption; 4. Patent document CN103866767B discloses a deepwater hydraulic pile hammer, which mainly considers how to improve the stability, reliability and efficiency of the pile hammer's underwater operation, but does not consider how to improve the relative safety of the pile hammer and other components. Summary of the invention

[0004] The object of the present invention is to provide a multi-dimensional positioning and shock absorbing device for a deepwater hydraulic pile hammer power station to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-dimensional positioning and shock absorbing device for a deepwater hydraulic pile hammer power station, including a power station, which is in the shape of a hollow cylinder, a positioning and shock absorbing cylinder is installed inside the power station, and the interior of the positioning and shock absorbing cylinder is sleeved with a cylinder body of a pile hammer, a lower vertical support ring is installed at the bottom of the cylinder body of the pile hammer, and the lower vertical support ring is located below the power station, a buffer seat installation square window hole is opened on the front and back sides of the positioning and shock absorbing cylinder, an upper vertical positioning and shock absorbing support plate is installed on the front and back sides of the positioning and shock absorbing cylinder, and the upper vertical positioning and shock absorbing support plate is located below the buffer seat installation square window hole, and a flange is installed at the bottom of the power station. The upper vertical positioning shock absorbing support plate and the flange are respectively installed with an upper vertical positioning shock absorbing assembly and a lower vertical positioning shock absorbing assembly, two groups of circumferential positioning shock absorber mounting blocks are installed on the front and back sides of the positioning shock absorber cylinder, and circumferential positioning shock absorbers are installed inside the circumferential positioning shock absorber mounting blocks, and the circumferential positioning shock absorbers are located on both sides of the shock absorbing assembly, and three groups of upper radial positioning shock absorber mounting holes and three groups of lower radial positioning shock absorber mounting holes are evenly opened on the outer surface of the positioning shock absorber cylinder, and the lower radial positioning shock absorber mounting holes are located below the upper radial positioning shock absorber mounting holes, and radial positioning shock absorbers are installed inside the lower radial positioning shock absorber mounting holes and the upper radial positioning shock absorber mounting holes.

[0006] Preferably, the pressure compensator tank group and the deep-water motor hydraulic oil pump group are evenly arranged on the circumference of the positioning shock-absorbing cylinder, and upper and lower groups of connecting parts are installed between the positioning shock-absorbing cylinder of the power station and the pressure compensator tank group and the deep-water motor hydraulic oil pump group of the power station. Pressure compensator tank group mounting holes and deep-water motor hydraulic oil pump group mounting holes are opened in the middle of the two groups of connecting parts, and the deep-water motor hydraulic oil pump group mounting holes are located on one side of the pressure compensator tank group mounting holes. The deep-water motor hydraulic oil pump group mounting holes are used to install the deep-water machine hydraulic oil pump group, and the pressure compensator tank group mounting holes are used to install the pressure compensator tank group.

[0007] Preferably, the upper vertical positioning shock absorbing assembly includes a buffer seat installed on the top of the upper vertical positioning shock absorbing support plate, the buffer seat is internally installed with a vertical positioning shock absorber, the bottom of the vertical positioning shock absorber is fitted with the top of the upper vertical positioning shock absorbing support plate, the lower vertical positioning shock absorber assembly includes a vertical positioning shock absorber installed on the top of the flange, the bottom of the vertical positioning shock absorber is fitted with the top of the lower vertical support ring, the vertical positioning shock absorber includes a cylinder body, a nitrogen chamber is provided inside the cylinder body, an inflation valve is installed inside the cylinder body, the output end of the inflation valve is connected to the nitrogen chamber, and a piston rod is installed at the bottom of the nitrogen chamber.

[0008] Preferably, the buffer seat is composed of two groups of circumferentially positioned shock absorber support plates and two groups of shock absorber mounting support plates, and the two groups of shock absorber mounting support plates are located between the two groups of circumferentially positioned shock absorber support plates.

[0009] Preferably, the two groups of shock absorber mounting support plates of the buffer seat are internally provided with upper vertical shock absorber mounting holes, and the upper vertical shock absorber mounting holes are used to place vertical positioning shock absorbers, and the back sides of the two groups of shock absorber mounting support plates are provided with two groups of buffer seat fixing screw holes.

[0010] Preferably, a buffer seat mounting base surface is provided on the front and back sides of the cylinder in the hammer body of the pile driving hammer, and the buffer seat mounting base surface corresponds to the position of the buffer seat.

[0011] Preferably, the circumferential positioning shock absorber includes an elastomer shell, which is C-shaped, with pressure rings installed at both ends of the elastomer shell, a polyurethane elastomer is installed on the inner side of the elastomer shell, and a telescopic plate is installed on the outer wall of one side of the polyurethane elastomer, the longitudinal section of the telescopic plate is T-shaped, the telescopic plate is located between the two groups of pressure rings, and the outer surface of one side of the telescopic plate is in contact with the outer wall of the support plate of the circumferential positioning shock absorber.

[0012] Preferably, the radial positioning shock absorber is composed of an elastomer shell two, a pressure cover, a polyurethane elastomer two and a telescopic plate two. The longitudinal section of the telescopic plate two is T-shaped, the pressure cover is located on one side of the elastomer shell two, the polyurethane elastomer two and the telescopic plate two are both located inside the elastomer shell two, one end of the telescopic plate two passes through the interior of the elastomer shell and is connected to the outer surface of the polyurethane elastomer two, and the outer wall of the other side of the telescopic plate two fits with the outer wall of the cylinder in the hammer body of the pile hammer.

[0013] Preferably, six groups of lower vertical direction shock absorber mounting holes are evenly opened inside the flange, and the lower vertical direction shock absorber mounting holes correspond to the positions of the lower vertical direction shock absorbing components.

[0014] Preferably, a circumferential direction positioning shock absorber mounting hole is provided inside the circumferential direction positioning shock absorber mounting block, and the circumferential direction positioning shock absorber mounting hole is used for mounting the circumferential direction positioning shock absorber.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is provided with a vertical positioning shock absorber, a circumferential positioning shock absorber and a radial positioning shock absorber. By arranging various forms of positioning shock absorber elements between the positioning shock absorber cylinder and the cylinder in the hammer body of the pile hammer, the six degrees of freedom of the positioning shock absorber cylinder relative to the cylinder in the hammer body of the pile hammer in the rectangular coordinate system are fully constrained. At the same time, relatively small movements between the positioning shock absorber cylinder and the cylinder in the hammer body of the pile hammer are allowed to reduce the impact of the impact vibration of the pile hammer on the power station and other components, thereby improving the reliability and service life of the deepwater hydraulic pile hammer.

[0016] 2. The present invention evenly distributes the "deepwater motor and hydraulic oil pump group" and the "hydraulic oil tank and hydraulic compensation device group" on the circumference of the positioning shock-absorbing cylinder in a one-to-one correspondence, thereby ensuring uniform mass distribution on the circumference of the positioning shock-absorbing cylinder, avoiding the imbalance of the positioning shock-absorbing cylinder's own weight on each shock-absorbing element to form an unbalanced load, ensuring the load balance of each shock-absorbing element, and thus extending the expected service life of the shock-absorbing element to a certain extent.

[0017] 3. In the present invention, when the cylinder in the hammer body of the pile driving hammer generates an upward impact force along the Z axis relative to the positioning shock-absorbing cylinder of the power station, the bottom of the telescopic piston rod of the upper vertical positioning shock absorber abuts against the positioning shock-absorbing support plate of the square window hole of the shock-absorbing cylinder of the power station, and when the cylinder in the hammer body of the pile driving hammer generates a downward impact force along the Z axis relative to the positioning shock-absorbing cylinder, the bottom of the telescopic piston rod of the lower vertical positioning shock absorber abuts against the lower vertical support ring of the cylinder in the hammer body. In the above two situations, the high-pressure nitrogen in the vertical positioning shock absorber is compressed, and along with the telescopic piston rod When the plunger is gradually pressed into the cavity, the internal pressure of the cavity further increases, and the resistance preventing the plunger from being pressed in further increases. The upward or downward impact force of the Z-axis generated by the shock-absorbing cylinder is absorbed by the nitrogen in the shock-absorbing body, thereby constraining the Z-axis displacement freedom and realizing the positioning shock absorption of the power station along the vertical direction of the Z-axis; when the cylinder in the hammer body of the pile hammer generates an impact force rotating around the Z-axis relative to the positioning shock-absorbing cylinder of the power station, the circumferential direction positioner on the upper part of the positioning shock-absorbing cylinder will be driven to move accordingly, and the telescopic plate of the circumferential direction positioning shock absorber will press against the circumferential direction positioning shock absorber support The support plate, and then the circumferential positioning shock absorber that fits with the buffer seat will be acted upon by force. When the telescopic plate 1 on the circumferential positioning shock absorber is loaded and compressed, the polyurethane elastomer 1 is compressed, and the telescopic plate 1 is displaced a certain distance toward the inner cavity. The impact force of the rotation around the Z axis is absorbed by the polyurethane elastomer 1. When the telescopic plate 1 is unloaded and depressurized, the polyurethane elastomer 1 rebounds, and the telescopic plate 1 will extend outward and reset, thereby realizing that the rotational freedom around the Z axis is constrained, and realizing the positioning shock absorption of the power station in the circumferential direction of rotation around the Z axis; when the cylinder in the hammer body of the pile hammer is relative to the positioning shock absorber of the power station When the shock cylinder generates impact force of rotation around the X and Y axes and displacement along the X and Y axes, the telescopic plate 2 of the radial positioning shock absorber, which is distributed in the upper and lower layers of the positioning shock absorber cylinder and three groups evenly distributed on each circumference, presses against the outer cylindrical surface of the cylinder in the hammer body. When the telescopic plate 2 is under pressure, the polyurethane elastomer 2 is compressed, and the telescopic plate 2 is displaced a certain distance into the inner cavity. When the telescopic plate 2 is unloaded and depressurized, the polyurethane elastomer 2 rebounds, and the telescopic plate 2 will extend outward and reset, thereby realizing the rotation around the X and Y axes and the displacement along the X and Y axes. The freedom is constrained, and the positioning shock absorption of the power station around the Z rotation circumferential direction is realized.

[0018] 4. The present invention ensures the relative position of the cylinder in the hammer body of the pile driving hammer and the positioning shock-absorbing cylinder by arranging a positioning shock-absorbing cylinder between the cylinder in the hammer body of the pile driving hammer and the positioning shock-absorbing cylinder of the power station, that is, the cylinder in the hammer body of the pile driving hammer is allowed to have a small displacement relative to the positioning shock-absorbing cylinder of the power station, and the small displacement is used as the buffering displacement of the positioning shock-absorbing cylinder, thereby avoiding the line tearing phenomenon caused by the huge displacement of the positioning shock-absorbing cylinder and the cylinder in the hammer body of the pile driving hammer due to the relative position. While ensuring the stable operation of the pile driving hammer, the relative safety of the pile driving hammer and other components is improved to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the buffer seat of the present invention; Figure 3 It is a schematic diagram of the main cross-sectional structure of the present invention; Figure 4 For the present invention Figure 3 A is a schematic diagram of the cross-sectional structure of the circumferential positioning shock absorber; Figure 5 For the present invention Figure 3 A schematic diagram of the cross-sectional structure of the radially positioned shock absorber at the upper (lower) part of the middle B; Figure 6 It is a schematic cross-sectional structure diagram of the vertical positioning shock absorber of the present invention; Figure 7 It is a schematic diagram for explaining the six-degree-of-freedom positioning of the power station of the present invention in a spatial rectangular coordinate system; Figure 8 It is a schematic diagram of the planar structure of the buffer seat installation base of the present invention.

[0020] In the figure: 1, power station; 2, middle cylinder of pile hammer body; 3, buffer seat mounting base; 4, buffer seat; 5, circumferential direction positioning shock absorber support plate; 6, shock absorber mounting support plate; 7, upper vertical direction shock absorber mounting hole; 8, buffer seat fixing screw hole; 9, lower vertical direction support ring; 10, circumferential direction positioning shock absorber; 11, buffer seat mounting square window hole; 12, elastomer shell 1; 13, pressure ring; 14, polyurethane elastomer 1; 15, telescopic plate 1; 16, circumferential direction positioning shock absorber mounting block; 17, circumferential direction positioning shock absorber mounting hole; 18 , radial positioning shock absorber; 19, elastomer shell 2; 20, pressure cover; 21, polyurethane elastomer 2; 22, telescopic plate 2; 23, upper radial positioning shock absorber mounting hole; 24, lower radial positioning shock absorber mounting hole; 25, upper vertical positioning shock absorber support plate; 26, vertical positioning shock absorber; 27, cylinder body; 28, nitrogen chamber; 29, charging valve; 30, piston rod; 31, flange; 32, lower vertical shock absorber mounting hole; 33, pressure compensator oil tank assembly mounting hole; 34, deep water motor hydraulic oil pump assembly mounting hole; 35, positioning shock absorber cylinder. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the term "vertical direction" refers to Figure 7 The Z-axis direction in the term "circumferential direction" refers to Figure 7 The term "radial" refers to the direction of rotation about the Z axis. Figure 7 in the diameter direction perpendicular to and passing through the Z axis.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Embodiment 1, See also Figure 1 , Figure 3 , Figure 5 and Figure 7, an embodiment provided by the present invention: a multi-dimensional positioning and shock absorbing device for a deepwater hydraulic pile hammer power station, comprising a power station 1, the power station 1 is in a hollow cylindrical shape, a positioning and shock absorbing cylinder 35 is installed inside the power station 1, the interior of the positioning and shock absorbing cylinder 35 is sleeved with a pile hammer body middle cylinder 2, a lower vertical support ring 9 is installed at the bottom of the pile hammer body middle cylinder 2, and the lower vertical support ring 9 is located below the power station 1, the front and back sides of the positioning and shock absorbing cylinder 35 are provided with a buffer seat installation square window hole 11, the front and back sides of the positioning and shock absorbing cylinder 35 are provided with an upper vertical positioning and shock absorbing support plate 25, and the upper vertical positioning and shock absorbing support plate 25 is located below the buffer seat installation square window hole 11, the bottom of the power station 1 is installed with a flange 31, the upper vertical positioning An upper vertical positioning shock absorbing assembly and a lower vertical positioning shock absorbing assembly are respectively installed on the positioning shock absorbing support plate 25 and the flange 31, and two groups of circumferential positioning shock absorber mounting blocks 16 are installed on the front and back sides of the positioning shock absorbing cylinder 35, and circumferential positioning shock absorbers 10 are installed inside the circumferential positioning shock absorber mounting blocks 16. The circumferential positioning shock absorbers 10 are located on both sides of the shock absorbing assembly, and three groups of upper radial positioning shock absorber mounting holes 23 and three groups of lower radial positioning shock absorber mounting holes 24 are evenly opened on the outer surface of the positioning shock absorbing cylinder 35, and the lower radial positioning shock absorber mounting holes 24 are located below the upper radial positioning shock absorber mounting holes 23, and radial positioning shock absorbers 18 are installed inside the lower radial positioning shock absorber mounting holes 24 and the upper radial positioning shock absorber mounting holes 23.

[0026] Further, establish Figure 8The spatial rectangular coordinate system shown in the figure, when in use, firstly install the deep-water motor, hydraulic oil pump group, hydraulic oil tank, and hydraulic compensation device group on the circumferential outer wall of the positioning shock-absorbing cylinder 35, and then put the power station 1 and the positioning shock-absorbing cylinder 35 on the cylinder 2 of the pile hammer body. There is an appropriate space between the cylinder 2 of the pile hammer body and the positioning shock-absorbing cylinder 35, which is convenient for installing the shock-absorbing element, and there is an appropriate relative displacement distance, which is convenient for the shock-absorbing element to function and can also help to install the shock-absorbing element. Since the lower part of the cylinder 2 of the pile hammer body is designed with a lower vertical support ring 9, and the lower end of the power station 1 is installed with a flange 31, the vertical positioning shock absorber 26 is used to support and limit between the flange 31 and the lower vertical support ring 9. Under the impact and vibration conditions of the pile hammer, the flange 31, the lower vertical support ring 9 and the vertical positioning shock absorber 26 limit the tendency of downward movement along the Z-axis direction, and the vertical positioning shock absorber 26 installed in the buffer seat installation square window hole 11 limits the tendency of downward movement along the Z-axis direction. Under the coordinated action of the flange 31, the lower vertical support ring 9, the vertical positioning shock absorber 26 and the vertical positioning shock absorber 26 in the buffer seat installation square window hole 11, the translational freedom along the Z-axis direction is constrained, and the shock absorbing and positioning function is played along the Z-axis direction. Circumferential positioning shock absorbers 10 are installed on both sides of the buffer seat installation square window hole 11, and the telescopic plates of the circumferential positioning shock absorber 10 are The bottom of 15 is against the circumferential direction positioning shock absorber support plate 5 of the buffer seat 4, and the buffer seat 4 in the buffer seat installation square window hole 11 and the vertical positioning shock absorber 26 are restricted to constrain the positioning shock absorber cylinder 35 to rotate relative to the power station 1 and the cylinder 2 in the hammer body of the pile driver around the Z axis, thereby realizing the positioning shock absorber effect of rotating around the Z axis. The upper and lower parts of the positioning shock absorber cylinder 35 are both installed with radial positioning shock absorbers 18, and the telescopic plate 22 of the radial positioning shock absorber 18 is against the outer cylindrical surface of the cylinder 2 in the hammer body of the pile driver. Through the joint action of the upper and lower radial positioning shock absorbers 18, the positioning shock absorber cylinder 35 is restricted from rotating relative to the power station 1 and the cylinder 2 in the hammer body of the pile driver around the X axis and around the Y axis, thereby realizing the positioning shock absorber effect of rotating around the X axis. The shock absorbing positioning in the direction of rotation around the Y axis, under the joint limiting positioning action of the circumferential positioning shock absorber 10, the buffer seat 4 in the buffer seat installation square window hole 11 and the vertical positioning shock absorber 26, the radial positioning shock absorber 18 at the upper and lower parts of the positioning shock absorber cylinder 35 and the vertical positioning shock absorber 26 at the flange 31, limits the freedom of movement along the X-axis and Y-axis directions, so that the positioning shock absorber cylinder 35 plays a role of positioning and shock absorption along the X-axis and Y-axis directions. Through a variety of shock absorbing elements, the positioning shock absorber cylinder 35 is restricted in six degrees of freedom in the spatial dimension, so that all relative movements between the positioning shock absorber cylinder 35 and the cylinder 2 in the hammer body of the pile hammer are constrained by the shock absorbing elements, and a comprehensive shock absorbing positioning effect is achieved; That is, when the cylinder in the hammer body of the pile driver generates an upward impact force along the Z axis relative to the positioning shock-absorbing cylinder of the power station, the bottom of the telescopic piston rod of the upper vertical positioning shock absorber abuts against the positioning shock-absorbing support plate of the square window hole of the shock-absorbing cylinder of the power station, and when the cylinder in the hammer body of the pile driver generates a downward impact force along the Z axis relative to the positioning shock-absorbing cylinder, the bottom of the telescopic piston rod of the lower vertical positioning shock absorber abuts against the lower vertical support ring of the cylinder in the hammer body. In the above two situations, the high-pressure nitrogen in the vertical positioning shock absorber is compressed. As the telescopic piston rod is gradually pressed into the cavity, the pressure inside the cavity is further increased, and the resistance preventing the plunger from being pressed in is further enhanced. The upward or downward impact force generated by the shock-absorbing cylinder in the Z axis is absorbed by the nitrogen in the shock-absorbing body, thereby realizing that the Z-axis displacement degree of freedom is constrained, and the positioning shock absorption of the power station along the vertical direction of the Z axis is realized. When the cylinder in the hammer body of the pile hammer generates an impact force rotating around the Z axis relative to the positioning shock absorber cylinder of the power station, the circumferential direction positioner on the upper part of the positioning shock absorber cylinder will be driven to move accordingly, and the telescopic plate of the circumferential direction positioning shock absorber will press against the supporting plate of the circumferential direction positioning shock absorber, and then the circumferential direction positioning shock absorber fitted with the buffer seat will be acted upon by force, when the telescopic plate on the circumferential direction positioning shock absorber is loaded and compressed, the polyurethane elastomer is compressed, and the telescopic plate is displaced a certain distance toward the inner cavity, and the impact force rotating around the Z axis is absorbed by the polyurethane elastomer, and when the telescopic plate is unloaded and depressurized, the polyurethane elastomer rebounds, and the telescopic plate extends outward to reset, thereby realizing that the rotational freedom around the Z axis is constrained, and realizing the positioning shock absorption of the power station in the circumferential direction of rotation around the Z axis; When the cylinder in the hammer body of the pile hammer generates an impact force of rotation around the X and Y axes and displacement along the X and Y axes relative to the positioning shock-absorbing cylinder of the power station, the telescopic plate 2 of the radial positioning shock absorber distributed in the upper and lower layers of the positioning shock-absorbing cylinder and three groups evenly distributed on each circumference presses against the outer cylindrical surface of the cylinder in the hammer body; when the telescopic plate 2 is under pressure, the polyurethane elastomer 2 is compressed, and the telescopic plate 2 is displaced toward the inner cavity for a distance; when the telescopic plate 2 is unloaded and depressurized, the polyurethane elastomer 2 rebounds, and the telescopic plate 2 extends outward and resets, thereby realizing the rotation around the X and Y axes and the displacement along the X and Y axes. The freedom is constrained, and the positioning shock absorption of the power station in the circumferential direction of rotation around the Z axis is realized.

[0027] The power station 1 is directly mounted on the outside of the cylinder 2 in the hammer body of the pile hammer to avoid many inconveniences caused by secondary lifting operations in deep-water construction. The entire deep-water hydraulic pile hammer power station is placed vertically in deep water, and a positioning shock-absorbing cylinder 35 is arranged inside the power station 1 to facilitate the subsequent distribution and installation of the deep-water motor, hydraulic oil pump group, hydraulic oil tank, and hydraulic compensation device group of the deep-water hydraulic pile hammer power station on the positioning shock-absorbing cylinder 35. There is a certain space between the power station 1 and the positioning shock-absorbing cylinder 35, and an appropriate relative displacement distance is reserved to facilitate the function of the shock-absorbing element and to help install the shock-absorbing element. Two centrally symmetrical buffer seat mounting square window holes 11 are opened at the upper end of the positioning shock-absorbing cylinder 35, and an upper vertical positioning shock-absorbing support plate 25 is arranged below the buffer seat mounting square window hole 11. A shock-absorbing assembly is installed inside the buffer seat mounting square window hole 11, and the bottom of the piston rod 30 of the shock-absorbing assembly is against the upper vertical positioning shock-absorbing support plate 25, which is used to limit the positioning shock-absorbing cylinder 35 from generating vertical displacement under the impact vibration condition of the pile hammer. The displacement on the buffer seat limits the freedom of parallel displacement of the positioning damping cylinder 35 in the Z-axis direction. In addition, circumferential positioning dampers 10 are installed on both sides of the buffer seat installation square window hole 11. The bottom of the telescopic plate 15 of the circumferential positioning damper 10 abuts against the circumferential positioning damper support plate 5 of the buffer seat 4 to limit the rotation of the positioning damping cylinder 35 around the Z-axis circumferential direction. The positioning damping cylinder 35 is constrained to a certain extent. The degree of freedom of rotation around the Z-axis, the lower vertical direction of the lower part of the cylinder 2 in the hammer body of the pile hammer The support ring 9 is used to support and limit the vertical downward movement of the positioning shock-absorbing cylinder 35. Three groups of radial positioning shock absorbers 18 distributed circumferentially are arranged on the upper waist and lower waist of the positioning shock-absorbing cylinder 35 to limit the rotation of the positioning shock-absorbing cylinder 35 around the X and Y axis directions, and perform positioning and shock absorption in the X and Y axis directions, which to a certain extent restricts the freedom of rotation around the X and Y axes. At the same time, the limiting effect of the power station 1 and the cylinder 2 in the hammer body of the pile hammer restricts the freedom of the positioning shock-absorbing cylinder 35 in the X-axis direction and the Y-axis direction. Through the cooperation of the lower vertical support ring 9 and the shock absorbing assembly, the freedom of the positioning shock absorbing cylinder 35 relative to the cylinder 2 in the pile hammer body in the Z-axis direction is limited, and the positioning shock absorbing cylinder 35 relative to the cylinder 2 in the pile hammer body in the X-axis and Y-axis directions are realized by the radial positioning shock absorbers 18 at the upper waist and the lower waist. By arranging various forms of positioning shock absorbing elements between the positioning shock absorbing cylinder 35 and the cylinder 2 in the pile hammer body, the six degrees of freedom of the positioning shock absorbing cylinder 35 relative to the cylinder 2 in the pile hammer body in the rectangular coordinate system of space are fully constrained, and at the same time, relatively small activities are allowed between the positioning shock absorbing cylinder 35 and the cylinder 2 in the pile hammer body, so as to reduce the impact of the impact vibration of the pile hammer on the power station 1 and other components, thereby improving the reliability and service life of the deepwater hydraulic pile hammer.

[0028] Embodiment 2: See also Figure 3 An embodiment of the present invention is: a multi-dimensional positioning shock absorbing device for a deepwater hydraulic pile hammer power station, wherein a pressure compensator tank group and a deepwater motor hydraulic oil pump group are evenly arranged on the circumference of the positioning shock absorbing cylinder 35, and an upper and lower groups of connecting parts are installed between the positioning shock absorbing cylinder 35 of the power station 1 and the pressure compensator tank group and the deepwater motor hydraulic oil pump group of the power station 1, and a pressure compensator tank group mounting hole 33 and a deepwater motor hydraulic oil pump group mounting hole 34 are opened in the middle of the two groups of connecting parts, and the deepwater motor hydraulic oil pump group mounting hole 34 is located on one side of the pressure compensator tank group mounting hole 33, and the deepwater motor hydraulic oil pump group mounting hole 34 is used to install the deepwater machine hydraulic oil pump group, and the pressure compensator tank group mounting hole 33 is used to install the pressure compensator tank group.

[0029] Furthermore, the positioning shock-absorbing cylinder 35 is a circular cylinder, which is mounted on the outer side of the cylinder 2 in the hammer body of the pile driving hammer. The cylinder 2 in the hammer body of the pile driving hammer is a guide cylinder of the hammer core of the pile driving hammer, and can also limit the movement of the positioning shock-absorbing cylinder 35 in all directions to a certain extent. There is a large amount of space between the positioning shock-absorbing cylinder 35 and the power station 1. Two groups of connecting parts are arranged between the positioning shock-absorbing cylinder 35 and the power station 1, and the connecting parts are provided with a pressure compensator oil tank group installation hole 33 and a deep-water motor hydraulic oil pump group installation hole 34, which are respectively used to install the hydraulic oil tank and the hydraulic compensation device group. The deep-water motor and hydraulic oil pump group are divided into the deep-water motor and hydraulic oil pump group, and the "deep-water motor and hydraulic oil pump group" and the "hydraulic oil tank and hydraulic compensation device group" are evenly distributed on the circumference of the positioning shock-absorbing cylinder 35 in a one-to-one correspondence, ensuring that the mass on the circumference of the positioning shock-absorbing cylinder 35 is evenly distributed, avoiding the imbalance of the weight of the positioning shock-absorbing cylinder 35 itself to form an eccentric load on each shock-absorbing element, ensuring the load balance of each shock-absorbing element, thereby extending the expected service life of the shock-absorbing element to a certain extent. The number of the pressure compensator tank group and the deep-water motor hydraulic oil pump group is configured as needed, and the number must correspond one to one; The relative position of the positioning shock-absorbing cylinder 35 and the cylinder 2 in the hammer body of the pile driver is relatively fixed, ensuring the connection reliability of the high and low pressure rubber hoses of the power station output oil pipe and the power lines, control lines, and detection information feeders of the electrical control components, and avoiding the pipeline tearing caused by the large-distance movement and large-angle rotation of the relative position of the positioning shock-absorbing cylinder 35 and the cylinder 2 in the hammer body of the pile driver.

[0030] Embodiment 3, See also Figure 3 and Figure 6, an embodiment provided by the present invention: a multi-dimensional positioning shock absorbing device of a deepwater hydraulic pile hammer power station, the upper vertical positioning shock absorbing assembly includes a buffer seat 4 installed on the top of an upper vertical positioning shock absorbing support plate 25, a vertical positioning shock absorber 26 is installed inside the buffer seat 4, the bottom of the vertical positioning shock absorber 26 is in contact with the top of the upper vertical positioning shock absorbing support plate 25, the lower vertical positioning shock absorbing assembly includes a vertical positioning shock absorber 26 installed on the top of a flange 31, the bottom of the vertical positioning shock absorber 26 is in contact with the top of a lower vertical support ring 9, the vertical positioning shock absorber 26 includes a cylinder body 27, a nitrogen chamber 28 is provided inside the cylinder body 27, an inflation valve 29 is installed inside the cylinder body 27, the output end of the inflation valve 29 is connected to the nitrogen chamber 28, and a piston rod 30 is installed at the bottom of the nitrogen chamber 28.

[0031] Furthermore, since the bottom of the vertical positioning shock absorber 26 in the shock absorbing assembly is against the lower vertical support ring 9 and the upper vertical positioning shock absorbing support plate 25, when the pile hammer generates impact vibration, the piston rod 30 will move upward and be pressed into the nitrogen chamber 28, thereby absorbing and buffering the impact, and then high-pressure nitrogen is injected into the nitrogen chamber 28 through the charging valve 29 to increase the pressure in the nitrogen chamber 28. When the piston rod 30 is pressed into the nitrogen chamber 28, the pressure inside the nitrogen chamber 28 will further increase, increasing the resistance of the piston rod 30 to be pressed in, thereby preventing the piston rod 30 from being pressed in. This resistance is balanced with the impact force received, thereby slowing down the vibration and impact on the positioning shock absorbing cylinder 35, the power station 1 and other components, so as to limit the vertical effect on the positioning shock absorbing cylinder 35 when the pile hammer generates impact. Since the upper and lower parts of the positioning shock absorbing cylinder 35 are provided with shock absorbing assemblies, the positioning shock absorbing effect in the upward or downward direction of the Z axis can be achieved.

[0032] Embodiment 4: See also Figure 2 , Figure 3 and Figure 8 , an embodiment provided by the present invention: a multi-dimensional positioning shock absorbing device of a deep-water hydraulic pile hammer power station, the buffer seat 4 is composed of two groups of circumferential positioning shock absorber support plates 5 and two groups of shock absorber mounting support plates 6, and the two groups of shock absorber mounting support plates 6 are located between the two groups of circumferential positioning shock absorber support plates 5; The two groups of shock absorber mounting support plates 6 of the buffer seat 4 are provided with upper vertical shock absorber mounting holes 7, and the upper vertical shock absorber mounting holes 7 are used to place the vertical positioning shock absorber 26. The backs of the two groups of shock absorber mounting support plates 6 are provided with two groups of buffer seat fixing screw holes 8; The front and back sides of the cylinder 2 in the hammer body of the pile hammer are both provided with a buffer seat mounting base surface 3 , and the buffer seat mounting base surface 3 corresponds to the position of the buffer seat 4 .

[0033] Furthermore, the buffer seat 4 is used to fix the position of the vertical positioning shock absorber 26, so as to facilitate fixing the vertical positioning shock absorber 26 on the positioning shock absorber cylinder 35 and the flange 31, and insert the vertical positioning shock absorber 26 into the upper vertical shock absorber mounting hole 7, and then align the buffer seat 4 with the buffer seat mounting base 3, and use bolts to insert into the corresponding buffer seat fixing screw holes 8 to fix it, the bottom push rod of the upper vertical positioning shock absorber 26 abuts against the upper vertical positioning shock absorber support plate 25, the bottom push rod of the lower vertical positioning shock absorber 26 abuts against the lower vertical support ring 9, and the bottom of the buffer seat 4 of the lower shock absorbing assembly abuts against the flange 31.

[0034] Embodiment 5, See also Figure 4 An embodiment of the present invention is: a multi-dimensional positioning shock absorbing device of a deepwater hydraulic pile hammer power station, wherein the circumferential positioning shock absorber 10 comprises an elastomer shell 12, the elastomer shell 12 is C-shaped, and pressure rings 13 are installed at both ends of the elastomer shell 12, a polyurethane elastomer 14 is installed on the inner side of the elastomer shell 12, and a telescopic plate 15 is installed on the outer wall of one side of the polyurethane elastomer 14, and the longitudinal section of the telescopic plate 15 is T-shaped. The telescopic plate 15 is located between the two groups of pressure rings 13, and the outer surface of one side of the telescopic plate 15 is in contact with the outer wall of the circumferential positioning shock absorber support plate 5.

[0035] Furthermore, the circumferential positioning shock absorber 10 is a rubber spring whose inner cavity is filled with polyurethane rubber. When the cylinder 2 in the hammer body of the pile hammer generates an impact force rotating around the Z axis relative to the positioning shock absorber cylinder 35, the shock absorbing component on the upper part of the positioning shock absorber cylinder 35 will be driven to move accordingly, and then the circumferential positioning shock absorber 10 that fits with the buffer seat 4 will be acted upon by force. When the telescopic plate 15 on the circumferential positioning shock absorber 10 is loaded and compressed, the polyurethane elastomer 14 is compressed, and the telescopic plate 15 is displaced a certain distance toward the inner cavity. When the telescopic plate 15 is unloaded and depressurized, the polyurethane elastomer 14 rebounds, and the telescopic plate 15 The retractable plate 15 of the circumferential positioning shock absorber 10 will be extended outward to reset, and the retractable plate 15 of the circumferential positioning shock absorber 10 will be against the circumferential positioning shock absorber support plate 5, so as to achieve buffering and shock absorption, so as to limit the rotation of the positioning shock absorber cylinder 35 relative to the cylinder 2 in the hammer body of the pile hammer around the Z-axis direction, so as to achieve the circumferential positioning and shock absorption effect, and perform secondary shock absorption on the basis of the shock absorption of the shock absorption component, further reducing the impact of the impact vibration of the pile hammer on the hydraulic unit, the deepwater control unit and the electrical control components, and further improving the reliability and life of the motor, oil pump, oil tank, pressure compensator in the hydraulic power station and the deepwater control unit and electrical control components installed thereon.

[0036] Embodiment six; See also Figure 5 The present invention provides an embodiment: a multi-dimensional positioning shock absorbing device for a deepwater hydraulic pile hammer power station, wherein the radial positioning shock absorber 18 is composed of an elastomer shell 19, a pressure cover 20, a polyurethane elastomer 21 and a telescopic plate 22. The longitudinal section of the telescopic plate 22 is T-shaped, the pressure cover 20 is located on one side of the elastomer shell 19, the polyurethane elastomer 21 and the telescopic plate 22 are both located inside the elastomer shell 19, one end of the telescopic plate 22 passes through the inside of the elastomer shell 19 and is connected to the outer surface of the polyurethane elastomer 21, and the outer wall of the other side of the telescopic plate 22 fits with the outer wall of the cylinder 2 in the hammer body of the pile hammer; Six groups of lower vertical shock absorber mounting holes 32 are evenly opened inside the flange 31, and the lower vertical shock absorber mounting holes 32 correspond to the positions of the lower vertical shock absorber components; A circumferential direction positioning shock absorber mounting hole 17 is provided inside the circumferential direction positioning shock absorber mounting block 16 , and the circumferential direction positioning shock absorber mounting hole 17 is used to install the circumferential direction positioning shock absorber 10 .

[0037] Furthermore, radial positioning shock absorbers 18 are installed on the upper and lower waists of the positioning shock absorber cylinder 35. The telescopic plate 22 of the radial positioning shock absorber 18 abuts against the cylinder 2 in the hammer body of the pile driver, and restricts the upper and lower parts of the cylinder 2 in the hammer body of the pile driver at the same time. There are three groups of radial positioning shock absorbers 18 in each layer, which are distributed in a circle. When the telescopic plate 22 is loaded and compressed, the polyurethane elastomer 21 is compressed, and the telescopic plate 22 is displaced toward the inner cavity for a distance. When the telescopic plate 22 is unloaded and depressurized, the polyurethane elastomer 21 rebounds, and the telescopic plate 22 extends outward and resets, and abuts against the cylinder 2 in the hammer body of the pile driver again. The upper and lower parts of the cylinder 2 in the hammer body of the pile driver are acted on respectively by the upper and lower radial positioning shock absorbers 18, so as to limit the rotation of the positioning shock absorber cylinder 35 relative to the power station 1 around the X and Y axes, and realize circumferential positioning shock absorption relative to the X and Y axes.

[0038] Working principle: the "deepwater motor and hydraulic oil pump group" and the "hydraulic oil tank and hydraulic compensation device group" are evenly distributed on the circumference of the positioning shock-absorbing cylinder 35 in a one-to-one correspondence, and the power station 1 is directly mounted on the outside of the cylinder 2 in the hammer body of the pile hammer. Under the impact vibration condition of the pile hammer, the positioning shock-absorbing cylinder 35 is limited in the Z-axis direction relative to the cylinder 2 in the hammer body of the pile hammer through the cooperation of the lower vertical support ring 9 and the shock-absorbing assembly. The positioning and shock-absorbing of the positioning shock-absorbing cylinder 35 relative to the cylinder 2 in the hammer body of the pile hammer in the X and Y axis directions are achieved through the radial positioning shock absorbers 18 at the upper waist and the lower waist. By arranging various forms of positioning shock-absorbing elements between the positioning shock-absorbing cylinder 35 and the cylinder 2 in the hammer body of the pile hammer, the six degrees of freedom of the positioning shock-absorbing cylinder 35 relative to the cylinder 2 in the pile hammer body in the spatial rectangular coordinate system are fully constrained.

[0039] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A multi-dimensional positioning and shock absorbing device for a deepwater hydraulic pile hammer power station, characterized in that: The invention comprises a power station (1), which is in the shape of a hollow cylinder. A positioning shock-absorbing cylinder (35) is installed inside the power station (1). A pile hammer body middle cylinder (2) is sleeved inside the positioning shock-absorbing cylinder (35). A lower vertical support ring (9) is installed at the bottom of the pile hammer body middle cylinder (2). The lower vertical support ring (9) is located below the power station (1). The front and back sides of the positioning shock-absorbing cylinder (35) are provided with buffer seat installation square window holes (11). The front and back sides of the positioning shock-absorbing cylinder (35) are installed with upper vertical positioning shock-absorbing support plates (25), and the upper vertical positioning shock-absorbing support plates (25) are located below the buffer seat installation square window holes (11). A flange (31) is installed at the bottom of the power station (1). The upper vertical positioning shock-absorbing support plate (25) and the flange (31) are connected to each other. 1) are respectively installed with an upper vertical positioning shock absorbing assembly and a lower vertical positioning shock absorbing assembly, two groups of circumferential positioning shock absorbing device mounting blocks (16) are installed on the front and back of the positioning shock absorbing cylinder (35), circumferential positioning shock absorbing devices (10) are installed inside the circumferential positioning shock absorbing device mounting blocks (16), and the circumferential positioning shock absorbing devices (10) are located on both sides of the shock absorbing assembly, and the outer surface of the positioning shock absorbing cylinder (35) is evenly opened with three groups of upper radial positioning shock absorbing device mounting holes (23) and three groups of lower radial positioning shock absorbing device mounting holes (24), and the lower radial positioning shock absorbing device mounting holes (24) are located below the upper radial positioning shock absorbing device mounting holes (23), and radial positioning shock absorbing devices (18) are installed inside the lower radial positioning shock absorbing device mounting holes (24) and the upper radial positioning shock absorbing device mounting holes (23).

2. The multi-dimensional positioning and shock absorbing device of a deepwater hydraulic pile hammer power station according to claim 1, characterized in that: The pressure compensator oil tank group and the deep-water motor hydraulic oil pump group are evenly arranged on the circumference of the positioning shock-absorbing cylinder (35); an upper and lower set of connecting parts are installed between the positioning shock-absorbing cylinder (35) of the power station (1) and the pressure compensator oil tank group and the deep-water motor hydraulic oil pump group of the power station (1); a pressure compensator oil tank group mounting hole (33) and a deep-water motor hydraulic oil pump group mounting hole (34) are opened in the middle of the two sets of connecting parts; the deep-water motor hydraulic oil pump group mounting hole (34) is located on one side of the pressure compensator oil tank group mounting hole (33); the deep-water motor hydraulic oil pump group mounting hole (34) is used to install the deep-water motor hydraulic oil pump group, and the pressure compensator oil tank group mounting hole (33) is used to install the pressure compensator oil tank group.

3. The multi-dimensional positioning and shock absorbing device of a deepwater hydraulic pile hammer power station according to claim 1, characterized in that: The upper vertical positioning shock absorbing assembly comprises a buffer seat (4) mounted on the top of the upper vertical positioning shock absorbing support plate (25); a vertical positioning shock absorber (26) is mounted inside the buffer seat (4); the bottom of the vertical positioning shock absorber (26) is in contact with the top of the upper vertical positioning shock absorbing support plate (25); the lower vertical positioning shock absorber assembly comprises a vertical positioning shock absorber (26) mounted on the top of the flange (31); the bottom of the vertical positioning shock absorber (26) is in contact with the top of the lower vertical support ring (9); the vertical positioning shock absorber (26) comprises a cylinder body (27); a nitrogen chamber (28) is arranged inside the cylinder body (27); an inflation valve (29) is mounted inside the cylinder body (27); the output end of the inflation valve (29) is connected to the nitrogen chamber (28); a piston rod (30) is mounted at the bottom of the nitrogen chamber (28).

4. The multi-dimensional positioning and shock absorbing device of a deepwater hydraulic pile hammer power station according to claim 3 is characterized in that: The buffer seat (4) is composed of two groups of circumferentially positioned shock absorber support plates (5) and two groups of shock absorber mounting support plates (6), and the two groups of shock absorber mounting support plates (6) are located between the two groups of circumferentially positioned shock absorber support plates (5).

5. The multi-dimensional positioning and shock absorbing device of a deepwater hydraulic pile hammer power station according to claim 4, characterized in that: The two groups of shock absorber mounting support plates (6) of the buffer seat (4) are provided with upper vertical shock absorber mounting holes (7) inside, and the upper vertical shock absorber mounting holes (7) are used to place vertical positioning shock absorbers (26). The backs of the two groups of shock absorber mounting support plates (6) are provided with two groups of buffer seat fixing screw holes (8).

6. The multi-dimensional positioning and shock absorbing device of a deepwater hydraulic pile hammer power station according to claim 3, characterized in that: The front and back sides of the cylinder (2) in the hammer body of the pile hammer are both provided with a buffer seat mounting base surface (3), and the buffer seat mounting base surface (3) corresponds to the position of the buffer seat (4).

7. The multi-dimensional positioning and shock absorbing device of a deepwater hydraulic pile hammer power station according to claim 1, characterized in that: The circumferential direction positioning shock absorber (10) comprises an elastomer shell (12), the elastomer shell (12) is C-shaped, pressure rings (13) are installed at both ends of the elastomer shell (12), a polyurethane elastomer (14) is installed on the inner side of the elastomer shell (12), and a telescopic plate (15) is installed on the outer wall of one side of the polyurethane elastomer (14), the longitudinal section of the telescopic plate (15) is T-shaped, the telescopic plate (15) is located between the two groups of pressure rings (13), and the outer surface of one side of the telescopic plate (15) is in contact with the outer wall of the circumferential direction positioning shock absorber support plate (5).

8. The multi-dimensional positioning and shock absorbing device of a deepwater hydraulic pile hammer power station according to claim 1, characterized in that: The radial positioning shock absorber (18) is composed of an elastomer shell (19), a pressure cover (20), a polyurethane elastomer (21) and a telescopic plate (22). The longitudinal section of the telescopic plate (22) is T-shaped. The pressure cover (20) is located on one side of the elastomer shell (19). The polyurethane elastomer (21) and the telescopic plate (22) are both located inside the elastomer shell (19). One end of the telescopic plate (22) passes through the inside of the elastomer shell (19) and is connected to the outer surface of the polyurethane elastomer (21). The outer wall of the other side of the telescopic plate (22) fits the outer wall of the cylinder (2) in the hammer body of the pile hammer.

9. The multi-dimensional positioning and shock absorbing device of a deepwater hydraulic pile hammer power station according to claim 1, characterized in that: Six groups of lower vertical shock absorber mounting holes (32) are evenly arranged inside the flange (31), and the lower vertical shock absorber mounting holes (32) correspond to the positions of the lower vertical shock absorber components.

10. The multi-dimensional positioning and shock absorbing device of a deepwater hydraulic pile hammer power station according to claim 1, characterized in that: A circumferential direction positioning shock absorber mounting hole (17) is provided inside the circumferential direction positioning shock absorber mounting block (16), and the circumferential direction positioning shock absorber mounting hole (17) is used to mount the circumferential direction positioning shock absorber (10).

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