• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In an hydraulic rock drill there is an hydraulic so called recoil damper that damps the reflected shock waves that propagates from the rock backwardly through the drill stem. The damper comprises a support piston (68) slidably in a cylinder so that a pressure chamber (20) is formed in which the support piston has a piston area. Narrow clearances (75,76) between the support (68) and its cylinder form leak passages and these leak passages are coupled in series with an orifice restrictor (84) to tank. The pressure peaks in the pressure chamber do not reach sealing rings located at the outer portions of the clearances.
    公开号:SU1272998A3
    申请号:SU823397337
    申请日:1982-02-09
    公开日:1986-11-23
    发明作者:Торстен Еклеф Эке
    申请人:Атлас Копко А.Б.(Фирма)；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION The invention relates to mining, in particular to hydraulic mechanisms of percussive action, used in drilling of rocks. The purpose of the invention is to increase the efficiency of the device by reducing leakage. Figure 1 and 2 presents the drilling device, a longitudinal section; on fig.Z - node 1 in figure 1. The drilling device comprises a front head 1, a cover 2, a gear housing 3 gears, an intermediate part 4, a cylinder 5 and a rear head 6. The piston-hammer 7 can reciprocate inside the cylinder 5. The piston 7 consists of a cylindrical rod with two hours Cylinders 8 and 9, Part of the piston 7 is designed to transmit blows to the holder 10, which is intended to secure the working tool (not shown). The rotary chuck 11 is provided with an annular gear wheel 12, which interacts with the gear wheel 13. The industrial fluid is supplied to the axial bore of the holder and to the drilling tool through the flushing head 14. The retaining ring 15 is mounted between the flushing head 14 and the drive sleeve 16. Support element 17 is inserted at the rear of the chuck 11. The supporting member 17 is provided with a ring 18 for stopping the rotating chuck 11 at the rear end surface. The supporting piston 19 is capable of providing displacement and a turning movement placed in the intermediate portion 4. The surface of the support piston 20 limits the movable wall delimiting the damping brake conductive or conductive chamber 21. The brake chamber 21 is limited by means of the rear surface 22 of the device housing. The feed force supplied to the hammer drill is transmitted to the drill bit.
    权利要求:
    Claims (3)
    [1]
    It is preferable that the surface of the piston 20 on the supporting piston 19 and the accumulator 23 are of such dimensions that the force acting in front of the supporting piston 19 substantially exceeds the feed force. With such dimensions, the position in which the holder 10 is located and, consequently, the crayfish from the chamber 21. In the annular grooves 29 and 30, sealing rings 31 and 32 are located at the outer ends of the gaps, channels 33 and 34 extend from the inner sides of the grooves 29 and 30, a drain sleeve 36 with a through hole, which forms a choke hole, is disposed to the drainage channel 35 of the tub. 35. Channel 37 feeds the escaping oil to the bore tool, when the piston strikes the holder, remains unchanged regardless of changes in the feed force. This forward-directed force is transmitted to the surface 24 on the lid 2 through the ring 18 on the sleeve of the support member 17, the cartridge 11 and the thrust bearing 25. When the drilling tool and the holder 10 bounce off the rock during operation of the drilling device, the holder 10 hits the sleeve of the support element 17. The recoil pulses are transmitted to the support piston 19 and then to the hydraulic fluid in the braking chamber, and the fluid in this case acts as a part that receives the recoil pulses. The accumulator 23 or other appropriate spring-loaded means are permanently connected to the damping fluid by means of a hydraulic liquid column in the channel 26. If the recoil force exceeds a certain value, the sleeve of the support element 17, and therefore also the support piston 19, comes out from contact with the chuck 11. With this device, the effect of recoil on the drilling device is damped. The holder 10 and the drilling tool are then returned by the pressure in the braking chamber 21 to a position that does not depend on the feed force. The rotation of the rotary chuck 11 and the holder is transmitted to the support piston 19 by means of the sleeve of the support element 17. The pressurized fluid in the braking chamber 21 thus provides a stop cushion for the holder 10 and the drilling tool. Narrow gaps 27 and 28 are formed between relatively moving surfaces (rotation and axial movement) of the support piston 19 and its cylinder, which is formed in the intermediate part 4 of the housing. These gaps 27 and 28 form narrow channels of the prote312 raly. Thus, the two gaps 27 and 28 form two stoppers that are connected in parallel with each other and are connected in series with a throttle bore of the sleeve 36. The throttle aperture represents a nozzle with a sharp edge of the aperture, i.e. nozzle which has a sharp entrance edge. The advantage is the presence of small leaks from the chamber 21, as the escaping oil carries heat from the chamber. However, the leak should not be too large, since the leak represents energy loss. The combination of limiters 27,28,36 described has two main advantages: it provides relatively small changes in the leakage flow with a change in viscosity and reduces the impact at the actual gap width due to the leakage flow. If the viscosity decreases, the flow through the gap 27 and 28 increases and due to the increase in the flow that passes through the opening of the restrictor 36, the pressure drop across the opening of the restrictor increases. Thus, the pressure drop across the gaps 27 and 28 decreases and the decreasing pressure drop tends to decrease the flow through the gaps. As a result, the increase in leakage flux will be relatively small. The gaps 27 and 28 will vary from one borer to another borer due to tolerances. Due to the presence of a restrictive orifice in the sleeve 36, changes in leakage flow between the drill tools will be relatively small, even when the gaps differ by a large amount. In the drill pullet, in which the gap width is 0.015 mm and the opening of the sleeve 36 has a diameter of 0.5 mm, the leakage flow is 1.2 liters / min. When the gap width doubles, the leakage flow increases to 1.7 l / min and increases very little. 8 In chamber 21, there is a normal pressure of the pump, which is usually above 200 bar, but the pressure peaks occurring during operation can exceed that value several times. These peaks will occur even when the channel 26 between the chamber 21 and the battery 23 is short, straight and wide, as shown in Fig. 1, since the pressure increase is very fast. The pressure peaks will however be damped in the gaps so that the sealing rings 31 and 32 will not be subjected to excessive pressure peaks. The pressure applied to the sealing rings is the pressure in channel 35, which is lower than the pressure in chamber 21. Claim 1. Borehole hydraulic percussion device containing a pressurized and merged line, piston-hammer, working tool with an anvil, support element for supporting the working tool and mounted in the cylinder, a supporting piston forming a damping chamber with the housing in communication with the pressure line, as well as gaps between the contact surfaces of the supporting piston and bodies, characterized in that, in order to increase the efficiency of the device by reducing leaks, a drainage channel is made in the body, which is communicated through the specified gaps and a throttle hole with a drain line.
    [2]
    2. A device according to claim 1, characterized in that the throttle hole is made with a sharp input edge.
    [3]
    3. The device according to PP.1-I 2, characterized in that the throttle opening is made in a replaceable sleeve.
    19 21 7 27
    29 33
    3 3S 28
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1272998A3|1986-11-23|Drilling hydraulic percussion device
    EP1611310B1|2007-10-10|A hydraulic drill string device, in particular a hydraulic in-hole rock drilling machine
    US5056606A|1991-10-15|Damped hammer drill
    US5715897A|1998-02-10|In-hole rock drilling machine with a hydraulic impact motor
    US4828048A|1989-05-09|Hydraulic Percussion tool
    US4073350A|1978-02-14|Device for damping the recoil of a work tool connected to a percussion tool
    US4068727A|1978-01-17|Method and device for damping the recoil of a work tool connected to a rock drilling machine
    US4660658A|1987-04-28|Hydraulic down-the-hole rock drill
    EP0543806B1|1996-01-17|Hydraulic down-the-hole rock drill
    US5002136A|1991-03-26|Damped hammer drill
    EP0584330B1|1996-05-15|Reversible bit bearing for percussion drill
    JP5830223B2|2015-12-09|Rock drill and method related to the rock drill
    GB1567090A|1980-05-08|Hydraulic powered rock drill
    EP0634559B1|1999-04-07|Fluid driven down-the-hole drilling machine
    US4726429A|1988-02-23|Percussion down hole drilling tool with central fluid flushing passage
    US4718500A|1988-01-12|Reversible percussion device for percussion tool
    US3464505A|1969-09-02|Drilling apparatus
    US3796271A|1974-03-12|Rock drill having a triple coaxial hammer
    EP0733153B1|2000-03-15|A hydraulic impact motor
    KR20200120671A|2020-10-21|Rotary impact hydraulic drill with control chamber permanently connected to the low pressure accumulator
    JP3588467B2|2004-11-10|Borehole drill
    US3460636A|1969-08-12|Percussive tools and machines
    US3945442A|1976-03-23|Hydraulic rock drill with stroke responsive advance
    CA1325562C|1993-12-28|Reciprocating percussive device
    US1326825A|1919-12-30|andersbon
    同族专利:
    公开号 | 公开日
    EP0058650A1|1982-08-25|
    EP0058650B1|1984-09-19|
    NO151531B|1985-01-14|
    NO151531C|1985-05-02|
    AT9450T|1984-10-15|
    ES509481A0|1983-01-16|
    AU8033682A|1982-08-19|
    DE3260748D1|1984-10-25|
    JPS57149176A|1982-09-14|
    ZA82492B|1982-12-29|
    FI73374C|1988-07-18|
    US4494614A|1985-01-22|
    SE8100961L|1982-08-12|
    JPH0141475B2|1989-09-05|
    CA1178513A|1984-11-27|
    AU544571B2|1985-06-06|
    FI73374B|1987-06-30|
    FI820237L|1982-08-12|
    ES8301724A1|1983-01-16|
    US4593768A|1986-06-10|
    NO820391L|1982-08-12|
    SE440873B|1985-08-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1771672A|1927-03-25|1930-07-29|Robert Alan Wimberley Bicknell|Liquid spring suspension for wave transmission tools|
    US2965074A|1958-10-29|1960-12-20|O D Herron|Hydraulic stop device|
    US3699675A|1971-04-05|1972-10-24|Hughes Tool Co|Hydraulic impactor methods and apparatus|
    US3887019A|1971-05-11|1975-06-03|Af Hydraulics|Hydraulic percussive implement|
    US3955478A|1973-10-29|1976-05-11|Dresser Industries, Inc.|Hydraulically powered percussion drill|
    SE398066B|1975-03-18|1977-12-05|Atlas Copco Ab|METHOD AND DEVICE FOR STRIKING PROCESSING FOR DAMPING THE RECYCLE FROM A WORKING TOOL|
    SE392830B|1975-03-18|1977-04-25|Atlas Copco Ab|MOUNTAIN DRILLING DEVICE FOR DAMPING THE RECYCLE FROM A WORK CONNECTED TO THE MACHINE|
    US4006666A|1975-05-22|1977-02-08|Towmotor Corporation|Cushioning device for a hydraulic jack|
    US4047595A|1975-09-22|1977-09-13|Ingersoll-Rand Company|Hydraulic-powered device|
    US4155287A|1977-11-30|1979-05-22|Hydroacoustics Inc.|Hydraulically operated impact devices|
    SE440873B|1981-02-11|1985-08-26|Atlas Copco Ab|HYDRAULIC SUSPENSION WITH REFLEX DUMPERS INCLUDING LOCK SPLACES IN SERIES WITH CUTTING NOZZLE|SE440873B|1981-02-11|1985-08-26|Atlas Copco Ab|HYDRAULIC SUSPENSION WITH REFLEX DUMPERS INCLUDING LOCK SPLACES IN SERIES WITH CUTTING NOZZLE|
    WO1986002694A1|1984-10-22|1986-05-09|Atlas Copco Aktiebolag|A rock drill|
    US4796956A|1985-07-30|1989-01-10|Spetsialnoe Konstruktorskoe Bjuro Gidroimpulsnoi Tekhniki|Machine for driving workings in hard rocks|
    FI861851A|1986-05-02|1987-11-03|Tampella Oy Ab|ANORDNING FOER ETT AXIALLAGER I EN BORRMASKIN.|
    FR2639279B1|1988-11-23|1991-01-04|Eimco Secoma|HYDRAULIC PERCUSSION APPARATUS WITH SHOCK ABSORBING DEVICE|
    SE463193B|1989-02-21|1990-10-22|Atlas Copco Mct Ab|DEVICE WITH BATTERY MACHINERY|
    US5060734A|1989-09-11|1991-10-29|United States Of America|Seawater hydraulic rock drill|
    ZA932778B|1993-04-21|1994-09-30|Jarmo Uolevi Leppaenen|Rock drill|
    FI102202B1|1997-03-21|1998-10-30|Tamrock Oy|An arrangement in a rock drilling machine and a method for controlling rock drilling|
    KR100524671B1|1998-12-31|2005-12-21|두산인프라코어 주식회사|Breaker|
    JP4463381B2|2000-06-01|2010-05-19|古河機械金属株式会社|Damper pressure control device for hydraulic drill|
    FI110804B|2000-06-27|2003-03-31|Sandvik Tamrock Oy|Method for opening joints of drilling components and rock drill|
    FR2837523B1|2002-03-19|2004-05-14|Montabert Sa|ROTO-PERCUTANT HYDRAULIC PERFORATOR HAMMER|
    SE528743C2|2005-06-22|2007-02-06|Atlas Copco Rock Drills Ab|Percussion for rock drill, procedure for effecting a reciprocating piston movement and rock drill|
    SE528745C2|2005-06-22|2007-02-06|Atlas Copco Rock Drills Ab|Valve device for percussion and percussion for rock drill|
    SE529416C2|2005-12-22|2007-08-07|Atlas Copco Rock Drills Ab|Damping device and drilling machine including such damping device|
    SE530781C2|2007-01-11|2008-09-09|Atlas Copco Rock Drills Ab|Rock drilling equipment and method associated with this|
    US8210274B2|2008-01-07|2012-07-03|Suk Shin In|Vibration hammer|
    US7980322B2|2008-12-22|2011-07-19|Alain Desmeules|Impact adapter for a rock drill|
    DE102011007433A1|2010-04-20|2011-12-08|Robert Bosch Gmbh|Hand machine tool device|
    SE534844C2|2010-05-28|2012-01-17|Atlas Copco Rock Drills Ab|Rock drill, detachable cartridge, padding and drill rig including rock drill|
    SE536562C2|2012-06-28|2014-02-25|Atlas Copco Rock Drills Ab|Device and method of a hydraulic rock drill and rock drill|
    US20140262395A1|2013-03-12|2014-09-18|Caterpillar Global Mining Equipment LLC.|Drilling apparatus|
    FR3026041B1|2014-09-18|2017-03-31|Montabert Roger|HYDRAULIC PERFORATION APPARATUS FOR PERFORATING MINE HOLES|
    CN107044258A|2017-04-06|2017-08-15|张家港保税区永大机械有限公司|A kind of multifrequency hydraulic rotary-percussive hammer drill|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE8100961A|SE440873B|1981-02-11|1981-02-11|HYDRAULIC SUSPENSION WITH REFLEX DUMPERS INCLUDING LOCK SPLACES IN SERIES WITH CUTTING NOZZLE|
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