CN112049833A - Novel hydraulic and pneumatic combined control cylinder of hydraulic hammer and sealing form - Google Patents
Novel hydraulic and pneumatic combined control cylinder of hydraulic hammer and sealing form Download PDFInfo
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- CN112049833A CN112049833A CN202010850597.4A CN202010850597A CN112049833A CN 112049833 A CN112049833 A CN 112049833A CN 202010850597 A CN202010850597 A CN 202010850597A CN 112049833 A CN112049833 A CN 112049833A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/02—Placing by driving
- E02D7/06—Power-driven drivers
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/02—Placing by driving
- E02D7/06—Power-driven drivers
- E02D7/14—Components for drivers inasmuch as not specially for a specific driver construction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1471—Guiding means other than in the end cap
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/202—Externally-operated valves mounted in or on the actuator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/24—Other details, e.g. assembly with regulating devices for restricting the stroke
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The utility model provides a reciprocating motion and the hammering of pile hammer are realized through hydraulic pressure force, aerodynamic force, hammer core gravity to novel hydraulic pressure pneumatic composite control jar and sealed form of hydraulic hammer hydropneumatic, by the piston rod, piston, airtight seal spare, liquid seal spare and the pneumatic composite control jar of cylinder body formation integral type. The integrated hydraulic and pneumatic composite control cylinder is compact in structure, the cylinder is composed of a shell, a high-pressure energy accumulator, a low-pressure energy accumulator and a closed space among cylinder bodies, the space in the hydraulic hammer is fully utilized, and the structural complexity caused by the fact that cylinder parts are added in the hammer is reduced. The piston end adopts a gas-liquid combined sealing form, the gas-liquid combined sealing form comprises three groups of assembled rings, gas sealing elements, oil sealing elements and the like, the compression rings are used as centers, gas and hydraulic sealing elements are respectively arranged on two sides, the outermost layer is respectively provided with a group of rings for bearing most of oil pressure and air pressure, the bearing capacity of the sealing elements is reduced, gas-liquid separation is realized, the complexity of a gas sealing structure and an oil sealing structure at the piston position can be reduced by adopting the structure, and then the combination of the hydraulic system and the pneumatic system of the pile hammer is. The structure can be used for driving inclined piles and underwater operation by adopting a totally enclosed structure and a piston rod guide mechanism.
Description
Technical Field
The invention belongs to the field of engineering machinery piling machinery, mechanical parts and transmission devices of mechanical engineering and civil engineering, and particularly relates to a mechanical structure and equipment of a hydraulic-pneumatic composite piling hammer.
Background
Compared with a hydraulic hammer which is rapidly developed in recent years, the traditional diesel hammer has the defects of environmental pollution control, piling efficiency, striking energy and the like, and has the characteristics of high piling efficiency, low noise, small vibration, no oil smoke pollution and the like.
The integrated hydraulic-pneumatic composite control cylinder of the double-acting hydraulic hammer is a core execution element of a hydraulic hammer pile driver, a cylinder body bears very large variable impact load during working, the requirements on the structure and the sealing form of the cylinder body are very high due to the specific working mode of the cylinder body, and the conventional hydraulic cylinder can leak and damage in different degrees after working for one to two months under the working condition, so that the conventional hydraulic cylinder cannot normally operate.
Patent US6162031 (TREMOULET JR OLIVIER L, Seal seat for high pressure pumps and vessels, 2000) proposes a sealing structure, including a sealing ring, an O-ring, a baffle ring, etc., the O-ring has a certain initial compression when installed, so that there is a certain initial contact pressure between the sealing ring and the piston rod, between the O-ring and the cylinder wall, when the liquid pressure in the cylinder increases, the O-ring is axially extruded, due to incompressibility of its material, the axial liquid pressure is transmitted to the radial direction, so that the contact pressure on the sealing surface increases synchronously with the increase of the liquid pressure in the cylinder, realizing self-tightening sealing; the triangular hoop is propped open under the action of pressure and prevents the sealing ring from being squeezed into a gap between the baffle ring and the cylinder body along with the expansion of the cylinder body. Patent CN 211039220U (zhushenqiang, a sealing support structure of a double-acting oil cylinder, 2020) proposes a sealing support structure of a double-acting oil cylinder, which includes a piston disposed in the oil cylinder, and is characterized by further including a guide support ring disposed at the front end and the rear end of the piston, and the piston indirectly contacts with the oil cylinder through the guide support ring; the middle part of the piston is provided with a groove, and a combined seal is arranged in the groove; the combined seal is of a five-layer structure, and a hard check ring, a soft check ring, an O-shaped seal ring, a soft check ring and a hard check ring are sequentially arranged from the front end to the rear end. Patent CN 209494786U (Zhuchanwan, a novel hydraulic hammer hydro-cylinder seal structure, 2019) proposes a novel hydraulic hammer hydro-cylinder seal structure, uses the high performance sealing member that forms by combination such as dust ring, U-shaped sealing washer, steckel and O shape circle, can play good sealed effect under the big operating mode of vibrations. But the structure and the sealing form are more complex, and the complexity of the structure of the hydraulic hammer is increased. Patent CN 102535465A ( Yao Bao, Shulingfei etc. the compound pile hammer of hydropneumatic, 2012) provides a mechanical structure of the compound pile hammer of hydropneumatic, solves the hydraulic pressure technique and the pneumatic technique combination problem of pile hammer through novel structure, realizes large-scale pile hammer hydraulic control system's large-traffic control of high pressure, and then reaches the great striking energy of the pneumatic pile hammer of hydropneumatic and strikes frequency. But the utilization rate of the internal space is lower, and the volume and the weight of the hydraulic hammer are increased.
The invention provides a novel hydraulic and pneumatic composite control cylinder of a hydraulic hammer and a sealing form, the novel hydraulic and pneumatic composite control cylinder is compact in structure, an airtight space formed by an outer shell, a cylinder body and the like is utilized to form a cylinder, the internal space of the hydraulic hammer is fully utilized, the structural complexity caused by the fact that a cylinder part is added in the hammer is reduced, a gas-liquid combined sealing form is adopted at a piston end, the novel hydraulic and pneumatic composite control cylinder comprises three groups of assembled rings, a gas sealing piece, an oil liquid sealing piece and the like, a compression ring is taken as the center, the gas sealing piece and the hydraulic sealing piece are respectively arranged on two sides, a group of rings are respectively arranged on the outermost layer to bear most of oil pressure and air pressure, the bearing capacity of the sealing piece is reduced, gas-liquid separation is.
Disclosure of Invention
The invention mainly aims to provide a novel hydraulic and pneumatic combined control cylinder of a hydraulic hammer and a sealing mode to realize the combination of a hydraulic system and a pneumatic system of a pile hammer and solve the problem of overlarge volume and weight of the pile hammer caused by the complicated structure of a cylinder body.
In order to achieve the above purpose, the solution adopted by the invention is as follows:
the utility model provides a novel hydraulic hammer hydropneumatic composite control jar and sealed form, includes piston ring 3, compression ring 4, solid fixed ring 5, cylinder body (integral type hydropneumatic composite control jar) 6, shell body 7, piston rod 9, hexagon socket head cap screw 10, piston rod bearing liner 11, piston rod seal box 12, gas seal 13, supporting ring 14, oil seal 15, supporting ring 16, O type ring 17, V type seal 18, gas-liquid combination sealing system A, the hydraulic oil seal structure B of integrated combination valve block end.
The integrated hydraulic and pneumatic composite control cylinder forms the hammering force of the pile hammer through hydraulic pressure generated by the hydraulic cylinder, aerodynamic force generated by the air cylinder and the gravitational potential energy of the piston rod and the hammer body, and realizes the reciprocating motion of the piston rod and the hammer body of the pile hammer. The hydraulic cylinder is connected with hydraulic oil with certain pressure to apply hydraulic force to one end of the piston, the cylinder is connected with gas with certain pressure to apply pneumatic force to the other end of the piston, and the reciprocating motion and the piling action of the piston rod of the piling hammer are realized through the combined action of the hydraulic force, the pneumatic force and the self-gravity potential energy of the hammer body.
The cylinder fully utilizes the space in the pile hammer, is composed of a closed space among a shell 7, a high-low pressure energy accumulator 8 and a cylinder body 6, adopts compressed gas as a working medium, compresses and expands the gas in the cylinder once in one working period, and utilizes the energy of the gas to accelerate the hammer body to descend. The problem of pile driver internally mounted space limited, newly-increased extra cylinder part leads to installation complexity and pile driver volume increase is solved.
Piston structure is gone up by piston rod 9, solid fixed ring 5, gas seal 13, supporting ring 14, compression ring 4, fluid seal 15, piston ring 3 and is constituteed, and piston ring 3, solid fixed ring 5 and compression ring 4 adopt the pin-connected panel structure, and the piston rod axial is equipped with three mounting groove, down is used for installing solid fixed ring 5, compression ring 4 and piston ring 3 respectively from the top, and gas seal 13 installs between solid fixed ring 5 and the compression ring 4, and fluid seal 15 installs between compression ring 4 and the piston ring 3. By adopting the split mounting type piston, the problem that the whole piston rod needs to be replaced due to long-time piston abrasion failure of the piston and piston rod integrated structure is avoided, and the service life of the piston rod is prolonged.
The piston rod 9 is a closed guide mechanism consisting of a top piston ring 3, a compression ring 4, a fixing ring 5, sealing elements 13 and 15, a bottom piston rod bearing sleeve 11, a piston rod seal box 12 and an oil sealing element 19.
The piston rod seal box 12 is of a stepped structure in the radial direction, and a support ring 16, a V-shaped seal ring 18 and an oil seal 19 are arranged between the piston rod seal box and the piston rod 9; the supporting ring 16, the V-shaped sealing ring 18 and the oil sealing element 19 are arranged at the position of the stepped surface of the piston rod sealing box 12; the V-shaped sealing ring 18 and the oil sealing piece 19 both have certain initial compression amount and are in close fit with the piston rod sealing box 12 and the piston rod 9; and an O-shaped ring seal 17 is arranged at the joint of the groove at the outer side of the piston rod seal box 12 and the integrated combined valve block 2.
The diameter of the bottom circle of the top stroke limiter 1 is slightly smaller than that of the hammer core, when the piston rod 9 moves to the top to the limit position, the movement of the hammer core is limited by the top stroke limiter 1, and the top of the piston rod 9 does not collide with the outer shell 7.
The integrated hydraulic and pneumatic composite control cylinder adopts a totally enclosed structure and a piston rod guide mechanism, and can be used for driving inclined piles and performing underwater operation.
Due to the adoption of the method, the invention has the following characteristics: through the mechanical structure who provides a novel hydraulic hammer hydropneumatic composite control jar and sealed form thereof, solve the separation problem of the hydraulic pressure of pile hammer and pneumatic module, realize the combination of hydraulic pressure and pneumatic technique, utilize pile driver internally mounted residual space as the gas seal space, make full use of pile driver inner space reduces built-in cylinder part and leads to further increase pile driver structural complexity, totally enclosed structure and piston rod guiding mechanism can be applied to and beat the batter pile and work under water.
Drawings
Fig. 1 is a schematic structural view of a main part of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a gas-liquid combined sealing system according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a hydraulic oil sealing structure of an integrated combination valve block end according to an embodiment of the invention.
The symbols shown in the drawings are: the hydraulic oil sealing device comprises a top stroke limiter 1, an integrated combined valve block 2, a piston ring X2, a compression ring X2, a fixing ring X2, a cylinder body (integrated hydraulic and pneumatic combined control cylinder) 6, a shell 7, an energy accumulator 8, a piston rod 9, a hexagon socket head screw 10, a piston rod bearing liner 11, a piston rod sealing box 12, a gas sealing element 13, a supporting ring 14, an oil sealing element 15, a supporting ring 16, an O-shaped ring 17, a V-shaped seal 18, an oil sealing element 19, a gas-liquid combined sealing system A and a hydraulic oil sealing structure B at the end of the integrated combined valve block.
Detailed Description
The invention is further described with reference to the following examples in conjunction with the accompanying drawings.
Fig. 1 is a schematic structural view of a main part of an embodiment of the present invention. As shown in the figure, the novel hydraulic and pneumatic combined control cylinder and the sealing form of the hydraulic hammer structurally comprise a top stroke limiter 1, an integrated combined valve block 2, a piston ring 3, a compression ring 4, a fixing ring 5, a cylinder body (integrated hydraulic and pneumatic combined control cylinder) 6, an outer shell 7, an energy accumulator 8, a piston rod 9, an inner hexagon head screw 10, a piston rod bearing bush 11 and a piston rod sealing box 12. The piston rod 9 is connected with the hammer body of the pile hammer.
The integrated hydraulic-pneumatic composite control cylinder is a key part of the hydraulic-pneumatic composite pile driving hammer. The sealed space between the cylinder body 6 and the outer shell 7 is connected with gas with certain pressure to act on one end of the piston with pneumatic force, the sealed space between the cylinder body 6, the piston rod 9, the integrated combined valve block 2 and the piston rod seal box 12 is connected with hydraulic oil with certain pressure to act on the other end of the piston with hydraulic force, the hydraulic force and the pneumatic force act on the same straight line, but the directions of the acting forces are opposite, and the reciprocating motion of the piston rod 9 is realized through the composite action of the hydraulic force, the pneumatic force and the dead weight of the hammer core.
The working analysis is as follows:
in the ascending process, the gas in the sealing chamber and the hammer core do work through hydraulic pressure, the potential energy of the gas in the sealing chamber and the hammer core is increased, and in the descending process, the hydraulic pressure is instantly reduced by switching the hydraulic circuit, so that the potential energy of the gas in the sealing chamber and the gravitational potential energy of the hammer core are released to form the hammering force of the pile hammer. The reciprocating motion and the piling action of the piston rod of the piling hammer are realized through the composite action of hydraulic pressure, pneumatic force and the self-gravity potential energy of the hammer body.
Energy storage during ascentE pComprises the following steps:
in the formula (I), the compound is shown in the specification,mis the mass of the hammer core;yis a rising displacement;y 0is the total displacement of the rise;A uthe effective area of the rodless cavity;G uis the gas volume constant in the nitrogen chamber;nis 1.4;V u0is the initial volume of the nitrogen chamber.
Kinetic energy of descending processE kComprises the following steps:
in the formula (I), the compound is shown in the specification,vis the hammer descent speed;E lto descendEnergy is lost in the process.
Fig. 2 is a schematic structural diagram of a gas-liquid combined sealing system according to an embodiment of the present invention. The gas-liquid combined sealing system of the embodiment comprises a piston ring 3, a compression ring 4, a fixing ring 5, a gas seal 13, a supporting ring 14 and an oil seal 15.
Specifically, piston ring 3, solid fixed ring 5 and compression ring 4 adopt the pin-connected panel structure, constitute by a pair of semi-ring, install respectively with the three mounting groove of piston rod axial in, from the top down be used for solid fixed ring 5 of installation, compression ring 4 and piston ring 3 respectively, gas seal 13 installs between solid fixed ring 5 and compression ring 4, fluid seal 15 installs between compression ring 4 and piston ring 3, compression ring both sides are equipped with supporting ring 14 respectively, adopt the pin-connected panel structure to prolong the life-span of piston rod, adopt the complexity that the combined seal reduces seal structure.
Fig. 3 is a schematic diagram of a hydraulic oil sealing structure of an integrated combination valve block end according to an embodiment of the invention. An O-ring seal 17 is arranged between the integrated combined valve block 2 and the cylinder body 6. The piston ring seal box 12 is of a stepped structure in the radial direction, and a support ring 16, a V-shaped seal ring 18 and an oil seal 19 are arranged between the piston ring seal box and the piston rod 9. And an O-shaped ring seal 17 is arranged at the joint of the outer side and the integrated valve block 2.
Furthermore, the novel hydraulic and pneumatic composite control cylinder and the sealing form of the hydraulic hammer adopt a fully-enclosed structure and a piston rod guide mechanism, so that the piling operation, the inclined pile driving operation and the underwater operation in the vertical direction can be realized.
The embodiments described above are intended to facilitate one of ordinary skill in the art in understanding and using the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art should make improvements and modifications to the present invention based on the disclosure of the present invention within the protection scope of the present invention.
Claims (6)
1. The utility model provides a novel hydraulic pressure pneumatic combination control jar and sealed form of hydraulic hammer which characterized in that: the top of the integrated combined valve block (2) is connected with the cylinder body (6) through an axial connecting hole, the bottom of the integrated combined valve block is coaxially matched with the stroke limiter 1, the cylinder body (6), the integrated combined valve block (2) and the central hole of the stroke limiter (1) are communicated, a piston rod (9) is installed in the central hole, the upper end of the piston rod (9) is connected with a piston, and the lower end of the piston rod is connected with a hammer body of the pile driving hammer; an airtight space is formed by an outer shell (7) and a cylinder body (6) at the upper end of the piston to form a cylinder, a hydraulic oil closed space is formed by the cylinder body (6), the integrated combined valve block (2), a seal box (12) and the like at the lower end of the piston to form a hydraulic cylinder, and the piston is sealed in a gas-liquid combined manner to form an integrated hydraulic-pneumatic composite control cylinder; a seal box (12) containing a seal and a piston containing the seal are respectively arranged at the free ends of the integrated combined valve block (2) and the cylinder body (6) to form a totally-enclosed sealing structure.
2. The novel hydraulic and pneumatic compound control cylinder and sealing form of the hydraulic hammer as claimed in claim 1 is characterized in that: the gas-liquid combined sealing structure is composed of a piston rod (9), a fixing ring (5), a gas seal (13), a supporting ring (14), a compression ring (4), an oil seal (15) and a piston ring (3); the piston ring (3), the fixing ring (5) and the compression ring (4) adopt an assembled structure, the piston rod is axially provided with three mounting grooves which are used for mounting the fixing ring (5), the compression ring (4) and the piston ring (3) from the top to the bottom respectively; the sections of the compression ring (4) and the piston ring (3) are rectangular with the width equal to the groove width and two corners removed, and the height is slightly larger than the groove depth; the section of the fixing ring (5) is a step-shaped convex section, the convex part of the fixing ring is matched with a first mounting groove at the top of the piston rod (3), and the step surface is matched with the surface of the mounting groove and is in a fixing form; two sides of the compression ring (4) are provided with supporting rings (14); a gas seal (13) is arranged between the fixed ring (5) and the compression ring (4), and an oil seal (15) is arranged between the compression ring (4) and the piston ring (3); the gas and oil seals have certain initial compression amount and are in close fit with the piston ring (3), the compression ring (4) and the fixing ring (5).
3. The novel hydraulic and pneumatic compound control cylinder and sealing form of the hydraulic hammer as claimed in claim 1 is characterized in that: the cylinder, the bottom is gas-liquid combination sealing system A, cylinder body (6) top is connected with shell body (7), and the cylinder body top radially has the aperture, gas can pass cylinder body (6) bottom connecting hole installation in integrating valve piece (2) through the connecting hole with the integrated mode of no pipeline with this aperture flow direction shell body (7) inner wall, the bottom axial is equipped with the connecting hole, be equipped with the energy storage ware bush in the connecting hole, high-low pressure energy storage ware (8) are inserted from shell (7), pass cylinder body (6) bottom connecting hole through the connecting hole, all be equipped with V type sealing washer with shell (7) and integrating valve piece (2) junction, form the totally enclosed type confined airtight space by shell body (7) inner wall to energy storage ware (8) outer wall.
4. The novel hydraulic and pneumatic compound control cylinder and sealing form of the hydraulic hammer as claimed in claim 1 is characterized in that: the piston rod (9) is provided with a guide mechanism and consists of a top piston ring (3), a compression ring (4), a fixing ring (5), sealing elements (13 and 15), a bottom piston rod bearing sleeve (11), a piston rod sealing box (12) and an oil sealing element (19) so as to form a piston rod guide closed structure.
5. The novel hydraulic and pneumatic compound control cylinder and sealing form of the hydraulic hammer as claimed in claim 4, is characterized in that: the piston rod seal box (12) is of a stepped structure in the radial direction, and a support ring (16), a V-shaped seal ring (18) and an oil seal (19) are arranged between the piston rod seal box and the piston rod (9); the support ring (16), the V-shaped seal ring (18) and the oil seal (19) are arranged on the step surface of the piston rod seal box (12); the V-shaped sealing ring (18) and the oil sealing element (19) both have certain initial compression amount and are in close fit with the piston rod sealing box (12) and the piston rod (9); and an O-shaped ring seal (17) is arranged at the joint of the outer side groove of the piston rod seal box (12) and the integrated combined valve block (2).
6. The novel hydraulic and pneumatic compound control cylinder and sealing form of the hydraulic hammer as claimed in claim 1 is characterized in that: the diameter of the bottom circle of the top stroke limiter (1) is slightly smaller than that of the hammer core, when the piston rod (9) moves to the top to the limit position, the hammer core moves to be limited by the top stroke limiter (1), and the top of the piston rod (9) cannot collide with the outer shell (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010850597.4A CN112049833A (en) | 2020-08-21 | 2020-08-21 | Novel hydraulic and pneumatic combined control cylinder of hydraulic hammer and sealing form |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010850597.4A CN112049833A (en) | 2020-08-21 | 2020-08-21 | Novel hydraulic and pneumatic combined control cylinder of hydraulic hammer and sealing form |
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| Publication Number | Publication Date |
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| CN112049833A true CN112049833A (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010850597.4A Pending CN112049833A (en) | 2020-08-21 | 2020-08-21 | Novel hydraulic and pneumatic combined control cylinder of hydraulic hammer and sealing form |
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| CN (1) | CN112049833A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983919A (en) * | 2021-03-31 | 2021-06-18 | 同济大学 | Large-impulse hydraulic power mechanism based on shaft flow distribution |
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Application publication date: 20201208 |