CN114922879A - Deep sea water pressure self-locking type oil cylinder - Google Patents
Deep sea water pressure self-locking type oil cylinder Download PDFInfo
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- CN114922879A CN114922879A CN202210352052.XA CN202210352052A CN114922879A CN 114922879 A CN114922879 A CN 114922879A CN 202210352052 A CN202210352052 A CN 202210352052A CN 114922879 A CN114922879 A CN 114922879A
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- oil
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- 239000013535 sea water Substances 0.000 title claims abstract description 16
- 239000000872 buffer Substances 0.000 claims abstract description 30
- 239000007853 buffer solution Substances 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 21
- 238000002347 injection Methods 0.000 claims description 20
- 239000007924 injection Substances 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 23
- 230000007613 environmental effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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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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- 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
- F15B15/1438—Cylinder to end cap assemblies
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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
- F15B15/1438—Cylinder to end cap assemblies
- F15B15/1442—End cap 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
- F15B15/1447—Pistons; Piston to piston rod assemblies
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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
- F15B15/1476—Special return means
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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
-
- 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
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/227—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having an auxiliary cushioning piston within the main piston or the cylinder end face
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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
- F15B15/26—Locking mechanisms
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention relates to the technical field of underwater hydraulic components, in particular to a deep sea water pressure self-locking oil cylinder which comprises a cylinder barrel, a front end cover, a rear end cover, a piston rod, a plug ring, an elastic cover and a connecting pipe, wherein the piston divides the cylinder barrel into a first oil cavity and a second oil cavity, the front end cover is provided with a first interface, the rear end cover is sequentially provided with a first channel, a second channel, a third channel and a fourth channel from the outer end to the inner end of the rear end cover, the rear end cover is also provided with a second interface, a first oil port and a second oil port, the plug is slidably arranged in the third channel, one end of the plug is provided with a first step groove, the plug ring is coaxially sleeved on the plug ring, one end of the plug ring is also provided with a second step groove which is coaxial with the plug ring and is communicated with the first oil port, the elastic cover is hermetically arranged at the outer end of the first channel, the outer end surfaces of the plug ring and the inner wall of the first channel and the inner surface of the elastic cover form a buffer cavity filled with buffer solution, the connecting pipe communicates the first interface and the second interface, and the oil cylinder is reliable in operation and better in self-locking effect.
Description
Technical Field
The invention relates to the technical field of underwater hydraulic elements, in particular to a deep sea water pressure self-locking type oil cylinder.
Background
With the development of mankind, the land resources are increasingly scarce, while the oceans cover about 70.8% of the surface of the earth, contain abundant biological, mineral, chemical and power resources and are one of the last available territories for mankind. Deep sea resource development is receiving more and more attention, and development equipment is also becoming more and more diversified. The hydraulic system has the advantages of strong bearing capacity, high power density, convenient speed regulation and the like, and is widely applied to deep sea resource development. Because the deep sea environment is inconvenient to maintain, the deep sea environment needs to float to the sea surface or even return to the land for maintenance each time, which is time-consuming and labor-consuming, the reliability of the system is especially important to be improved.
The largest differences between hydraulic systems in deep sea and land based environments are pressure and medium. The pressure can reach dozens of megapascals under the deep sea environment, and the environment medium is water; the onshore ambient pressure is only 0.1Mpa, while the ambient medium is air. In hydraulic systems, the hydraulic medium, referred to as system blood, is an important source of system failure. Get into the air and can age with higher speed fluid in land fluid, can change fluid after operating for a certain time usually, but at deep sea operating mode, pressure is high, and water can invade more easily, leads to fluid rotten, causes the system fault. Therefore, the deep sea hydraulic system generally adopts a pressure compensation technology to eliminate the influence of the seawater pressure on the system, and improve the system efficiency and the system sealing reliability. In a hydraulic system, a cylinder and a motor are common actuating elements. The motor is a rotary shaft seal, the pressure on the two sides of the sealing piece is irrelevant to the work charge, and the oil pressure can be slightly larger than the ambient water pressure through the pressure compensation technology, so that the oil is leaked to seawater; dynamic seal, oil pressure and work load of hydro-cylinder piston rod department closely are relevant, can't guarantee to be greater than environment water pressure through pressure compensation technique, and the piston rod motion process adsorbs the impurity granule easily moreover, causes the damage easily to the sealing member. Therefore, the dynamic seal of the piston rod becomes a main cause of water inflow of the deep sea system.
The land self-locking oil cylinder generally mainly has two structural forms of mechanical self-locking and interference fit self-locking. The mechanical structure is self-locked, and the volume and weight of the oil cylinder can be increased by adding a self-locking structure device; the interference fit self-locking adopts the interference fit of the piston and the cylinder barrel, the length and the diameter of the piston rod can be increased, and the effective locking force is limited. In a deep sea environment, all parts deform due to environmental pressure, so that the fit clearance changes. All deep sea oil cylinder self-locking generally adopts a mechanical structure, and the structure is large in size and is not suitable for a compact structure system.
Chinese patent CN201910114863.4 includes an oil cylinder barrel, one end of which is mounted with an oil cylinder front end cover, the other end is mounted with an oil cylinder rear end cover through a sealing device, the inner wall surface of the oil cylinder barrel is mounted with an oil cylinder piston through the sealing device, the middle part of the oil cylinder piston extends out of an oil cylinder piston rod, the oil cylinder piston rod penetrates out of the oil cylinder front end cover, and the oil cylinder pull rods are mounted on the outer side walls of the oil cylinder front end cover and the oil cylinder rear end cover; the hydro-cylinder auto-lock valve is all installed to the below of hydro-cylinder front end housing and hydro-cylinder rear end cap, and both structures are the same, and the symmetry sets up, and the mounting structure of hydro-cylinder auto-lock valve in the hydro-cylinder rear end cap is: a step hole is transversely formed below the rear end cover of the oil cylinder, a self-locking valve core is installed in the step hole and is of a cross structure, the head of the self-locking valve core is in butt joint with the inside of a cylinder barrel of the oil cylinder, the outer circumferential surface of the self-locking valve core is connected with the inner wall surface of the step hole through a self-locking valve sealing ring, a self-locking valve adjusting screw is installed at the tail of the self-locking valve core through a self-locking valve spring, and a through hole communicated with the self-locking valve adjusting screw is formed in the lower portion of the step hole.
This auto-lock hydro-cylinder needs to settle two hydro-cylinder auto-lock valves in two oil mouths department, and is comparatively loaded down with trivial details, and hydro-cylinder auto-lock valve receives the water pressure influence less, unable effectual locking.
Disclosure of Invention
Therefore, it is necessary to provide a deep sea water pressure self-locking type oil cylinder in order to solve the problems in the prior art.
In order to solve the problems of the prior art, the invention adopts the technical scheme that:
a deep sea water pressure self-locking oil cylinder comprises a cylinder barrel, a front end cover, a rear end cover, a piston rod, a plug ring, an elastic cover and a connecting pipe, wherein the front end cover and the rear end cover are arranged at two ends of the cylinder barrel, the piston is arranged in the cylinder barrel in a sliding manner, the piston divides the cylinder barrel into a first oil cavity close to the front end cover and a second oil cavity close to the rear end cover, the piston rod is fixedly connected with the piston and penetrates through the front end cover, a first interface communicated with the outside and the first oil cavity is arranged on the front end cover, a first channel, a second channel, a third channel and a fourth channel are sequentially arranged on the rear end cover from the outer end to the inner end of the rear end cover, the diameters of the first channel, the second channel, the third channel and the fourth channel are gradually reduced, a second interface communicated with the outside and the second channel, a first oil port communicated with the outside and the first channel, and a second oil port communicated with the outside and the third channel are also arranged on the rear end cover, the plug is coaxially and slidably arranged in the third channel, one end of the plug is abutted to first step surfaces of the third channel and the fourth channel, one end of the plug is further provided with a first step groove which is coaxial with the plug and communicated with the second oil port, the plug ring is coaxially sleeved on the plug and is in sliding fit with the first channel, one end of the plug ring is abutted to third step surfaces of the first channel and the second channel, one end of the plug ring is further provided with a second step groove which is coaxial with the plug ring and communicated with the first oil port, the elastic cover is hermetically arranged at the outer end of the first channel, the outer end surfaces of the plug and the plug ring, a buffer cavity filled with buffer solution is formed on the inner wall of the first channel and the inner surface of the elastic cover, and the connecting pipe is communicated with the first interface and the second interface.
Preferably, the outer end of the rear end cover is provided with a first ring groove, the outer peripheral surface of the first ring groove is provided with a thread coaxial with the first ring groove, one end edge of the elastic cover extends along the axial direction to form a barrel part sleeved on the inner peripheral surface of the first ring groove, the edge of the barrel part extends outwards to form a ring edge, the oil cylinder further comprises an external thread ring, the external thread ring is coaxially screwed in the first ring groove, and the external thread ring abuts against the outer end of the ring edge.
Preferably, the edge of the plug towards one end of the fourth channel has a first conical surface which coaxially abuts against the outer port of the fourth channel.
Preferably, the rim of the end of the ring facing the second channel has a second conical surface, which abuts coaxially against the outer port of the second channel.
Preferably, the rear end cover is further provided with a liquid injection hole used for communicating the outside and the buffer cavity, and the oil cylinder further comprises a plug piece coaxially arranged in the liquid injection hole.
Preferably, the oil cylinder further comprises an external thread limiting ring, the external thread limiting ring is coaxially screwed at the outer port of the first channel, and the inner diameter of the external thread limiting ring is smaller than the outer end diameter of the plug ring.
Preferably, the plug is sleeved with a first sealing ring in interference fit with the third channel.
Preferably, the outer circumferential surface of the plug ring is sleeved with a second sealing ring in interference fit with the first channel.
Preferably, the outer side of the circumferential surface of the plug is provided with a boss coaxial with the circumferential surface of the plug, the outer side of the inner circumferential surface of the plug ring is provided with a third stepped groove coaxial with the plug, the boss is in coaxial sliding fit with the third stepped groove, the circumferential surface of the boss is sleeved with a third sealing ring in interference fit with the third stepped groove, and the inner circumference of the plug ring is further provided with a fourth sealing ring in interference fit with the circumferential surface of the plug.
Preferably, the contact area of the first stepped groove and the third passage is equal to the contact area of the second stepped groove and the first passage, and the contact area of the plug and the second oil chamber is equal to the contact area of the plug ring and the second passage.
Compared with the prior art, the beneficial effect of this application is:
1. according to the oil injection device, the plug and the plug ring are arranged in the rear end cover in a sliding mode, when the oil injection pressure is larger than the deformation pressure and the environmental water pressure of the elastic cover, the plug or the plug ring can slide in the rear end cover to inject oil into the first oil cavity or the second oil cavity, the oil pressure in the first oil cavity and the second oil cavity is larger than the environmental pressure, seawater can be prevented from leaking into the first oil cavity or the second oil cavity, the operation is reliable, and the self-locking effect is better;
2. according to the buffer liquid sealing device, the first annular groove is formed in the outer end face of the rear end cover, so that the rear end cover and the elastic cover can be disassembled and assembled, and meanwhile, the sealing performance of the buffer liquid in the buffer cavity can be guaranteed;
3. according to the plug, the first conical surface is formed at the edge of one end, facing the fourth channel, of the plug column, and the first conical surface can be coaxially inserted into the outer port of the fourth channel, so that the fourth channel is stably plugged;
4. according to the plug structure, the edge of one end, facing the second channel, of the plug ring forms a second conical surface, so that the second conical surface can be coaxially inserted into an outer port of the second channel, and the second channel is stably plugged;
5. according to the buffer liquid injection device, the liquid injection hole for communicating the outside with the buffer cavity is formed in the rear end cover, buffer liquid can be injected into the buffer cavity through the liquid injection hole, and after the oil injection is finished, the liquid injection hole can be blocked through the plug part, so that the buffer liquid is prevented from overflowing outwards;
6. according to the plug, the external thread limiting ring is coaxially screwed at the outer port of the first channel, so that the plug column and the plug ring can be prevented from being directly separated from the rear end cover due to high-pressure oil;
7. according to the oil-water separator, the first sealing ring in interference fit with the third channel is sleeved on the plug, so that high-pressure oil in the third channel can be effectively prevented from overflowing into the second channel through a wall gap;
8. according to the oil-water separator, the second sealing ring in interference fit with the first channel is sleeved on the outer circumferential surface of the plug ring, so that high-pressure oil in the first channel can be effectively prevented from overflowing into the buffer cavity through a wall gap;
9. according to the plug, the boss is in sliding fit in the third stepped groove, and the boss and the third stepped groove are respectively provided with the third sealing ring and the fourth sealing ring, so that high-pressure oil in the first channel cannot overflow into the buffer cavity through the inner wall of the plug ring when the plug and the plug ring slide relatively;
10. this application is through making the area of contact with the third passageway equal to the area of contact of second step groove and first passageway, and the area of contact that makes the plunger and second oil pocket equals the area of contact of cock ring and second passageway, and then can promote plunger or cock ring with the same oil pressure promptly and slide in the rear end cap.
Drawings
Fig. 1 is a perspective view of a self-locking type cylinder of the present application;
FIG. 2 is a side view of the self-locking cylinder of the present application;
FIG. 3 is a perspective sectional view at section A-A of FIG. 2;
FIG. 4 is a cross-sectional view at section A-A of FIG. 2;
FIG. 5 is a side view of the rear end cap of the present application;
FIG. 6 is a cross-sectional view at section C-C of FIG. 5;
FIG. 7 is an enlarged view of a portion of FIG. 6 at E;
FIG. 8 is an enlarged view of a portion of FIG. 6 at F;
FIG. 9 is an axially exploded cross-sectional view of the back end cap, plug post and plug ring of the present application.
The reference numbers in the figures are:
1 a-a cylinder barrel; 1a1 — a first oil chamber; 1a 2-a second oil chamber; 1 b-front end cap; 1b1 — first interface; 1 c-rear end cap; 1c1 — first channel; 1c2 — second channel; 1c3 — third channel; 1c 4-fourth channel; 1c5 — second interface; 1c6 — first oil port; 1c 7-second oil port; 1c8 — first ring groove; 1c 9-liquid injection hole; 1 d-a piston; 1 e-a piston rod; 1 f-a pull rod; 2-plugging the column; 2 a-first step groove; 2 b-a first conical surface; 2 c-a first sealing ring; 2 d-boss; 2 e-a third seal ring; 3-a plug ring; 3 a-a second step groove; 3 b-a second conical surface; 3 c-a second seal ring; 3 d-third step groove; 3 e-a fourth seal ring; 4-an elastic cover; 4 a-a barrel portion; 4 b-ring edge; 5-connecting pipe; 6-buffer solution; 7-external thread circle; 8-a plug member; 9-external thread limiting ring.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
As shown in fig. 1-9, the present application provides:
a deep sea water pressure self-locking type oil cylinder comprises a cylinder barrel 1a, a front end cover 1b, a rear end cover 1c, a piston 1d, a piston rod 1e, a plunger 2, a plunger ring 3, an elastic cover 4 and a connecting pipe 5, wherein the front end cover 1b and the rear end cover 1c are arranged at two ends of the cylinder barrel 1a, the piston 1d is arranged in the cylinder barrel 1a in a sliding mode, the piston 1d divides the cylinder barrel 1a into a first oil cavity 1a1 close to the front end cover 1b and a second oil cavity 1a2 close to the rear end cover 1c, the piston rod 1e is fixedly connected with the piston 1d and penetrates through the front end cover 1b, a first interface 1b1 communicating the outside and the first oil cavity 1 is arranged on the front end cover 1b, a first channel 1c1, a second channel 1c2, a third channel 1c3 and a fourth channel 1c4 are sequentially arranged on the rear end cover 1c from the outer end to the inner end of the rear end cover, the rear end of the rear end cover is provided with a first channel 1c1, a second channel 1c2, a third channel 1c 736 and a fourth channel 4831 c4 with diameters of which are gradually reduced, the rear end cover 1c is further provided with a second interface 1c5 communicated with the outside and the second channel 1c2, a first oil port 1c6 communicated with the outside and the first channel 1c1, and a second oil port 1c7 communicated with the outside and the third channel 1c3, the plug 2 is coaxially and slidably arranged in the third channel 1c3, one end of the plug 2 is abutted against the first step surfaces of the third channel 1c3 and the fourth channel 1c4, one end of the plug 2 is further provided with a first step groove 2a which is coaxial with the plug and communicated with the second oil port 1c7, the plug ring 3 is coaxially sleeved on the plug 2 and is in sliding fit with the first channel 1c1, one end of the plug ring 3 is abutted against the third step surfaces of the first channel 1c1 and the second channel 1c2, one end of the plug ring 3 is further provided with a second step groove 3a which is coaxial with the plug ring 633 and is communicated with the first oil port 1c6, the elastic cover 4 is hermetically arranged at the outer end of the first channel 1c1, and the outer end surface of the plug ring 3 and the outer end of the plug ring 3, The inner wall of the first channel 1c1 and the inner surface of the elastic cover 4 form a buffer chamber filled with buffer solution 6, and the connection pipe 5 is communicated with the first connector 1b1 and the second connector 1c 5.
Based on the above embodiment, the technical problem that this application wants to solve is how to carry out the auto-lock to the hydro-cylinder under the state of environment water pressure. Therefore, by arranging the plug 2 and the plug ring 3 in the rear end cover 1c in a sliding manner, when the oil injection pressure is greater than the deformation pressure and the ambient water pressure of the elastic cover 4, the plug 2 or the plug ring 3 can slide in the rear end cover 1c to inject oil into the first oil chamber 1a1 or the second oil chamber 1a2, the oil pressure in the first oil chamber 1a1 and the second oil chamber 1a2 is greater than the ambient pressure, seawater can be prevented from leaking into the first oil chamber 1a1 or the second oil chamber 1a2, the operation is reliable, and the self-locking effect is better;
specifically, when the self-locking oil cylinder is in a deep sea environment but is not in operation, assuming that the ambient water pressure is P1, the elastic cover 4 is under the ambient water pressure, and the contact area between the elastic cover 4 and the sea water is S1; the second port 1c7 is communicated with the pressure oil, and assuming that the initial pressure of the second port 1c7 is P2, the contact area of the first step groove 2a and the pressure oil is S2; assuming that the pressure at the first step groove 2a is P3, the contact area of the first step groove 2a and the second oil chamber 1a2 is S3, and in the balanced state of the plug 2, F + P1S 1> P2S 2+ P3S 3, where F is the elastic pressure of the elastic cover 4 to the outer end face of the plug 2;
when the self-locking oil cylinder works in deep sea, pressure oil is boosted, so that P2 is far greater than the elastic pressure of the elastic cover 4 and the environmental water pressure, the high-pressure oil pushes the first stepped groove 2a to enable the plug 2 to slide in the third channel 1c3, in the process, the plug 2 needs to overcome the elastic pressure and the environmental water pressure of the elastic cover 4, the plug 2 slides in the third channel 1c3 to communicate the third channel 1c3 with the fourth channel 1c4, so that the second oil cavity 1a2 is communicated with the second oil port 1c7, the high-pressure oil pushes the rear end cover 1c to slide in the cylinder 1a towards the front end cover 1b, and the piston rod 1e can be driven to extend outwards;
when the self-locking oil cylinder is in a deep sea environment but does not work, the environment water pressure is P1, the elastic cover 4 is under the environment water pressure, and the contact area of the elastic cover 4 and the sea water is S1; the second port 1c5 is communicated with the first port 1b1 through the pull rod 1f, and assuming that the oil pressure at the second port 1c5 is P4, the contact area between the inner end surface of the plug ring 3 and the second passage 1c2 is S4; the first oil port 1c6 is communicated with an oil tank, assuming that the oil pressure at the second step groove 3a is P5, the contact area of the second step groove 3a and the first channel 1c1 is S5, and in a balanced state of the plug ring 3, F + P1S 1 is greater than P4S 4+ P5S 5, wherein F is the elastic pressure of the elastic cover 4 to the outer end face of the plug column 2;
because the piston 1d slides in the cylinder 1a, the pressure in the first oil chamber 1a1 is increased, the oil in the first oil chamber 1a1 sequentially passes through the first port 1b1, the connecting pipe 5 and the first oil port 1c6, and is injected into the first channel 1c1, the pressure in the first oil port 1c6 is increased, until the P4 is far greater than the elastic pressure of the elastic cover 4 and the ambient water pressure, the high-pressure oil pushes the second stepped groove 3a to make the plug ring 3 slide in the third channel 1c3, in the process, the plug column 2 needs to overcome the elastic pressure of the elastic cover 4 and the ambient water pressure, and the plug ring 3 slides in the first channel 1c1 to communicate the first channel 1c1 and the second channel 1c2, so that the first port 1b1 is communicated with the first oil port 1c6, and the pressure in the first oil chamber 1a1 returns to the oil chamber;
when the high-pressure oil source of the second oil port 1c7 is cut off, when the pressure P2 is reduced, the pressure P4 is reduced, the plug column 2 and the plug ring 3 reset under the action of the ambient water pressure and the elastic pressure of the elastic cover 4, the plug column 2 blocks the fourth channel 1c4 and the third channel 1c3, the plug ring 3 blocks the first channel 1c1 and the second channel 1c2, the situation that the pressure of one side of the oil cylinder is lower than the ambient water pressure due to inertia of the piston rod 1e is avoided, and the pressure at the first interface 1b1 and the fourth channel 1c4 of the oil cylinder is definitely higher than the ambient water pressure at the moment, so that the external seawater is prevented from entering the oil cylinder, and the self-locking function of the oil cylinder is realized;
when the first oil port 1c6 is selected to be communicated with the pressure oil and the second oil port 1c7 is selected to be communicated with the oil tank, the high-pressure oil flows in the opposite path, and the resetting work of the piston rod 1e is completed in sequence;
by injecting the buffer solution 6 into the buffer cavity, the water pressure can be stably conducted to the outer end faces of the plug column 2 and the plug ring 3 through the buffer solution 6, so that the self-locking is stabilized.
As some optional embodiments of the present application, the oil cylinder further includes a pull rod 1f for connecting the front end cover 1b and the rear end cover 1c, and the front end cover 1b and the rear end cover 1c can be stably connected by the pull rod 1f to prevent them from being separated from both ends of the cylinder barrel 1 a.
As shown in fig. 9, further:
the outer end of the rear end cover 1c is provided with a first annular groove 1c8, the outer peripheral surface of the first annular groove 1c8 is provided with a thread coaxial with the first annular groove, one end edge of the elastic cover 4 extends along the axial direction to form a barrel part 4a sleeved on the inner peripheral surface of the first annular groove 1c8, the edge of the barrel part 4a extends outwards to form a ring edge 4b, the oil cylinder further comprises an external thread ring 7, the external thread ring 7 is coaxially screwed in the first annular groove 1c8, and the external thread ring 7 abuts against the outer end of the ring edge 4 b.
Based on the above-described embodiment, the technical problem that the present application intends to solve is how to mount the elastic cover 4 on the outer end of the rear end cover 1 c. Therefore, the first annular groove 1c8 is arranged on the outer end face of the rear end cover 1c, the elastic cover 4 forming the cylinder part 4a is sleeved on the first annular groove 1c8, the outer thread ring 7 is coaxially screwed in the first annular groove 1c8, the end face of the outer thread ring is abutted against the outer end of the ring edge 4b, and the rear end cover 1c and the elastic cover 4 can be detachably mounted, and meanwhile, the sealing performance of the buffer solution 6 in the buffer cavity can be guaranteed.
As shown in fig. 7, further:
the edge of the plug 2 facing one end of the fourth channel 1c4 has a first tapered surface 2b, and the first tapered surface 2b coaxially abuts against the outer port of the fourth channel 1c 4.
Based on the above embodiments, the technical problem that the present application intends to solve is how to stably and coaxially block the outer port of the fourth channel 1c4 by the plug 2. For this purpose, the present application forms the first tapered surface 2b on the edge of the plug 2 facing one end of the fourth channel 1c4, so that the first tapered surface 2b can be coaxially inserted into the outer port of the fourth channel 1c4, thereby stably blocking the fourth channel 1c 4.
As shown in fig. 8, further:
the rim of the end of the plug ring 3 facing the second channel 1c2 has a second conical surface 3b, the second conical surface 3b coaxially abutting against the outer port of the second channel 1c 2.
Based on the above embodiment, the technical problem to be solved by the present application is how to stably and coaxially plug the outer port of the second passage 1c2 with the plug ring 3. For this purpose, the present application stably plugs the second channel 1c2 by forming the second tapered surface 3b on the edge of the plug ring 3 facing one end of the second channel 1c2, so that the second tapered surface 3b can be coaxially inserted into the outer port of the second channel 1c 2.
As shown in fig. 6 and 9, further:
the rear end cover 1c is also provided with a liquid injection hole 1c9 for communicating the outside with the buffer cavity, the oil cylinder also comprises a plug member 8, and the plug member 8 is coaxially arranged in the liquid injection hole 1c 9.
Based on the above-described embodiment, the technical problem that the present application intends to solve is how to inject the buffer solution 6 into the buffer chamber. Therefore, according to the buffer liquid injection device, the liquid injection hole 1c9 used for communicating the outside with the buffer cavity is formed in the rear end cover 1c, buffer liquid 6 can be injected into the buffer cavity through the liquid injection hole 1c9, the liquid injection hole 1c9 can be blocked through the plug piece 8 after oil injection is finished, the buffer liquid 6 is prevented from overflowing outwards, and the blocking pressure of the plug column 2 and the plug ring 3 can be adjusted by adjusting the pressure in the buffer cavity.
As shown in fig. 6 and 9, further:
the oil cylinder further comprises an external thread limiting ring 9, the external thread limiting ring 9 is coaxially screwed at the outer port of the first channel 1c1, and the inner diameter of the external thread limiting ring 9 is smaller than the outer end diameter of the plug ring 3.
Based on the above embodiments, the technical problem that the present application intends to solve is how to avoid the plug 2 and the plug ring 3 from sliding off the rear end cap 1 c. For this reason, this application is through connecting an external screw thread spacing collar 9 at the outer port of first passageway 1c1 coaxial screw to make the internal diameter of external screw thread spacing collar 9 be less than the outer end diameter of cock ring 3, make external screw thread spacing collar 9 can carry out spacing to cock post 2 and cock ring 3, in order to prevent to lead to cock post 2 and cock ring 3 directly to break away from rear end lid 1c because of high-pressure oil.
As shown in fig. 6, further:
the plug 2 is sleeved with a first sealing ring 2c which is in interference fit with the third channel 1c 3.
Based on the above-described embodiment, the technical problem that the present application intends to solve is how to avoid the high-pressure oil in the third passage 1c3 from overflowing into the second passage 1c 2. Therefore, the first sealing ring 2c in interference fit with the third channel 1c3 is sleeved on the plug 2, so that high-pressure oil in the third channel 1c3 can be effectively prevented from overflowing into the second channel 1c2 through a wall gap.
As shown in fig. 6, further:
the outer circumferential surface of the plug ring 3 is sleeved with a second sealing ring 3c which is in interference fit with the first passage 1c 1.
Based on the above-described embodiment, the technical problem that the present application intends to solve is how to prevent the high-pressure oil in the first passage 1c1 from overflowing into the buffer chamber through the inner wall of the first passage 1c 1. Therefore, the second sealing ring 3c in interference fit with the first channel 1c1 is sleeved on the outer circumferential surface of the plug ring 3, so that the high-pressure oil in the first channel 1c1 can be effectively prevented from overflowing into the buffer cavity through a wall gap.
As shown in fig. 6, further:
the outer side of the circumferential surface of the plug 2 is provided with a boss 2d coaxial with the plug, the outer side of the inner circumferential surface of the plug ring 3 is provided with a third stepped groove 3d coaxial with the plug, the boss 2d is in coaxial sliding fit with the third stepped groove 3d, a third sealing ring 2e in interference fit with the third stepped groove 3d is sleeved on the circumferential surface of the boss 2d, and a fourth sealing ring 3e in interference fit with the circumferential surface of the plug 2 is further arranged on the inner circumference of the plug ring 3.
Based on the above-described embodiment, the technical problem that the present application intends to solve is how to prevent the high-pressure oil in the first passage 1c1 from overflowing into the buffer chamber through the inner wall of the stopper ring 3. Therefore, the boss 2d is in sliding fit in the third stepped groove 3d, the third sealing ring 2e and the fourth sealing ring 3e are arranged on the boss 2d and the third stepped groove 3d respectively, and when the plug column 2 and the plug ring 3 slide relatively, high-pressure oil in the first channel 1c1 cannot overflow into the buffer cavity through the inner wall of the plug ring 3.
As shown in fig. 6, further:
the contact area of the first stepped groove 2a with the third passage 1c3 is equal to the contact area of the second stepped groove 3a with the first passage 1c1, and the contact area of the plug 2 with the second oil chamber 1a2 is equal to the contact area of the plug ring 3 with the second passage 1c 2.
Based on the above embodiment, the technical problem to be solved by the present application is how to make the force required for sliding the plug 2 and the plug ring 3 in the rear end cap 1c the same. For this reason, the present application can push the plug 2 or the plug ring 3 to slide in the rear end cover 1c with the same oil pressure by making the contact area of the second stepped groove 3a and the third passage 1c3 equal to the contact area of the second stepped groove 3a and the first passage 1c1, and making the contact area of the plug 2 and the second oil chamber 1a2 equal to the contact area of the plug ring 3 and the second passage 1c 2.
The above examples, which are intended to represent only one or more embodiments of the present invention, are described in greater detail and with greater particularity, and are not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (10)
1. A deep sea water pressure self-locking oil cylinder comprises a cylinder barrel (1a), a front end cover (1b), a rear end cover (1c), a piston (1d) and a piston rod (1e), wherein the front end cover (1b) and the rear end cover (1c) are arranged at two ends of the cylinder barrel (1a), the piston (1d) is arranged in the cylinder barrel (1a) in a sliding mode, the piston (1d) divides the cylinder barrel (1a) into a first oil cavity (1a1) close to the front end cover (1b) and a second oil cavity (1a2) close to the rear end cover (1c), the piston rod (1e) is fixedly connected with the piston (1d) and penetrates through the front end cover (1b), a first connector (1b1) which is communicated with the outside and the first oil cavity (1a1) is arranged on the front end cover (1b), and the deep sea water pressure self-locking oil cylinder is characterized in that a first channel (1c1), a second channel (1c2) and a second channel (1c) are sequentially arranged at the inner end from the outer end of the inner end cover (1c) to the outer end of the rear end cover (1c) in sequence, The diameter of the first channel (1c1), the second channel (1c2), the third channel (1c3) and the fourth channel (1c 8657) is gradually reduced, the rear end cover (1c) is further provided with a second interface (1c5) for communicating the outside with the second channel (1c2), a first oil port (1c6) for communicating the outside with the first channel (1c1), and a second oil port (1c7) for communicating the outside with the third channel (1c3), the oil cylinder further comprises a plug column (2), a plug ring (3), an elastic cover (4) and a connecting pipe (5), the plug column (2) is coaxially arranged in the third channel (1c3) in a sliding manner, one end of the plug column (2) is abutted to a first step surface of the third channel (1c3) and the fourth channel (1c4), one end of the plug column (2) is further provided with a first step surface which is coaxially communicated with the first step surface (892 a) of the second step surface (1c4), stopper ring (3) coaxial cover establish on stopper post (2) and with first passageway (1c1) sliding fit, the one end butt first passageway (1c1) of stopper ring (3) and the third step face of second passageway (1c2), the one end of stopper ring (3) still is equipped with rather than coaxial and with second step groove (3a) of first hydraulic fluid port (1c6) intercommunication, elastic cover (4) seal sets up the outer end at first passageway (1c1), the outer terminal surface of stopper post (2) and stopper ring (3), the inner wall of first passageway (1c1) and the inner face of elastic cover (4) form the buffer chamber of annotating buffer solution (6), connecting pipe (5) intercommunication first interface (1b1) and second interface (1c 5).
2. The deep sea hydraulic self-locking oil cylinder as claimed in claim 1, wherein the outer end of the rear end cover (1c) is provided with a first ring groove (1c8), the outer circumferential surface of the first ring groove (1c8) is provided with a thread coaxial therewith, one end edge of the elastic cover (4) extends along the axial direction thereof with a cylinder part (4a) sleeved on the inner circumferential surface of the first ring groove (1c8), the edge of the cylinder part (4a) extends outwards with a ring edge (4b), the oil cylinder further comprises an external thread ring (7), the external thread ring (7) is coaxially screwed in the first ring groove (1c8), and the external thread ring (7) abuts against the outer end of the ring edge (4 b).
3. A deep sea hydraulic self-locking cylinder according to claim 1, wherein the edge of the plug (2) facing the end of the fourth channel (1c4) has a first tapered surface (2b), and the first tapered surface (2b) coaxially abuts against the outer port of the fourth channel (1c 4).
4. The deep sea hydraulic self-locking oil cylinder as claimed in claim 1, wherein the edge of the plug ring (3) facing one end of the second channel (1c2) is provided with a second conical surface (3b), and the second conical surface (3b) is coaxially abutted against the outer port of the second channel (1c 2).
5. The deep sea hydraulic self-locking cylinder as claimed in claim 1, wherein the rear end cap (1c) is further provided with a liquid injection hole (1c9) for communicating the outside with the buffer chamber, and the cylinder further comprises a plug member (8), and the plug member (8) is coaxially arranged in the liquid injection hole (1c 9).
6. The deep sea hydraulic self-locking oil cylinder according to claim 1, characterized in that the oil cylinder further comprises an external thread limiting ring (9), the external thread limiting ring (9) is coaxially screwed at an outer port of the first passage (1c1), and the inner diameter of the external thread limiting ring (9) is smaller than the outer end diameter of the plug ring (3).
7. The deep sea hydraulic self-locking type cylinder according to claim 1, wherein the plug (2) is sleeved with a first sealing ring (2c) which is in interference fit with the third passage (1c 3).
8. The deep sea hydraulic self-locking type cylinder according to claim 1, wherein the second sealing ring (3c) which is interference-fitted with the first passage (1c1) is fitted over the outer circumferential surface of the stopper ring (3).
9. The deep sea hydraulic self-locking oil cylinder according to claim 1, wherein a boss (2d) coaxial with the plug is arranged on the outer side of the circumferential surface of the plug (2), a third stepped groove (3d) coaxial with the plug is arranged on the outer side of the inner circumferential surface of the plug ring (3), the boss (2d) is in coaxial sliding fit with the third stepped groove (3d), a third sealing ring (2e) in interference fit with the third stepped groove (3d) is sleeved on the circumferential surface of the boss (2d), and a fourth sealing ring (3e) in interference fit with the circumferential surface of the plug (2) is further arranged on the inner circumferential surface of the plug ring (3).
10. The deep sea hydraulic self-locking type cylinder according to any one of claims 1 to 9, wherein a contact area of the first stepped groove (2a) with the third passage (1c3) is equal to a contact area of the second stepped groove (3a) with the first passage (1c1), and a contact area of the plug (2) with the second oil chamber (1a2) is equal to a contact area of the plug ring (3) with the second passage (1c 2).
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| CN202210352052.XA CN114922879B (en) | 2022-04-02 | 2022-04-02 | Deep sea water pressure self-locking type oil cylinder |
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| CN202210352052.XA CN114922879B (en) | 2022-04-02 | 2022-04-02 | Deep sea water pressure self-locking type oil cylinder |
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| US4635536A (en) * | 1983-09-19 | 1987-01-13 | Miller Fluid Power Corporation | Cylinder locking apparatus |
| JP2004225777A (en) * | 2003-01-22 | 2004-08-12 | Komatsu Ltd | Cushion device for hydraulic cylinder |
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| CN104763706A (en) * | 2015-04-02 | 2015-07-08 | 中船重工中南装备有限责任公司 | Mechanical self-locking hydraulic cylinder |
| CN104989699A (en) * | 2015-08-04 | 2015-10-21 | 山东同力液压装备有限公司 | Reinforced self-locking wind-power hydraulic cylinder |
| CN109578377A (en) * | 2019-01-30 | 2019-04-05 | 华中科技大学无锡研究院 | The hydraulic cylinder of the two-way dual mechanical locking in any position can be achieved |
| CN109695605A (en) * | 2019-02-14 | 2019-04-30 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | A kind of deep-sea self-shield self-locking oil cylinder |
| CN211314729U (en) * | 2019-12-24 | 2020-08-21 | 无锡市益得孚液压缸有限公司 | Locking structure for piston rod of hydraulic cylinder |
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2022
- 2022-04-02 CN CN202210352052.XA patent/CN114922879B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4635536A (en) * | 1983-09-19 | 1987-01-13 | Miller Fluid Power Corporation | Cylinder locking apparatus |
| JP2004225777A (en) * | 2003-01-22 | 2004-08-12 | Komatsu Ltd | Cushion device for hydraulic cylinder |
| CN204003787U (en) * | 2014-06-25 | 2014-12-10 | 长治清华机械厂 | Elastic card claw retractably enclosed automatic locking mechanism for a kind of oil hydraulic cylinder |
| CN104763706A (en) * | 2015-04-02 | 2015-07-08 | 中船重工中南装备有限责任公司 | Mechanical self-locking hydraulic cylinder |
| CN104989699A (en) * | 2015-08-04 | 2015-10-21 | 山东同力液压装备有限公司 | Reinforced self-locking wind-power hydraulic cylinder |
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| CN109695605A (en) * | 2019-02-14 | 2019-04-30 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | A kind of deep-sea self-shield self-locking oil cylinder |
| CN211314729U (en) * | 2019-12-24 | 2020-08-21 | 无锡市益得孚液压缸有限公司 | Locking structure for piston rod of hydraulic cylinder |
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