EP2379283A1 - Damping device for percussion device, percussion device and drilling machine - Google Patents
Damping device for percussion device, percussion device and drilling machineInfo
- Publication number
- EP2379283A1 EP2379283A1 EP09838481A EP09838481A EP2379283A1 EP 2379283 A1 EP2379283 A1 EP 2379283A1 EP 09838481 A EP09838481 A EP 09838481A EP 09838481 A EP09838481 A EP 09838481A EP 2379283 A1 EP2379283 A1 EP 2379283A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- damping
- choking
- piston
- chamber
- percussion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000013016 damping Methods 0.000 title claims abstract description 106
- 238000009527 percussion Methods 0.000 title claims abstract description 25
- 238000005553 drilling Methods 0.000 title claims description 15
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000012530 fluid Substances 0.000 claims abstract 2
- 230000004044 response Effects 0.000 claims abstract 2
- 239000011435 rock Substances 0.000 claims description 14
- 230000011514 reflex Effects 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000035939 shock Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/24—Damping the reaction force
- B25D17/245—Damping the reaction force using a fluid
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B1/00—Percussion drilling
- E21B1/38—Hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
- B25D9/14—Control devices for the reciprocating piston
- B25D9/145—Control devices for the reciprocating piston for hydraulically actuated hammers having an accumulator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
- B25D2217/0011—Details of anvils, guide-sleeves or pistons
- B25D2217/0019—Guide-sleeves
Definitions
- the invention concerns a damping device for a percussion device according to the preamble of claim 1.
- the invention also concerns a percussion device and a drilling machine.
- the aim of a damping device in a drilling machine is to protect the drilling machine from reflecting shock waves that occur during drilling. Further, the damping device aims to provide enhanced conditions for transfer of the feed force over the drill steel to the rock, in order to ensure rock contact during drilling.
- a damping device for percussive machines including a first chamber being connected to an accumulator and a second chamber for damping reflexes from the drill steel.
- a damping piston is with snug fit receivable into the second chamber, which results in that the reflexes of the rock are damped by liquid being pressed out through the slot being formed between the piston and the machine housing when the piston moves in a direction opposite to the striking direction.
- a non return valve is arranged between the chambers and is directed such that a liquid flow is allowed from the first chamber to the second chamber when the piston moves out from the second chamber.
- damping piston before a strike is intended to be positioned in a so called floating position, around which it can move in the striking direction as well as in the opposite direction.
- a damping chamber, wherein a damping piston is received is connected to an accumulator, and a previously known representative -.of this category of dampers acts as a hydraulic spring, wherein, in practice, no energy reception or energy consumption exists for achieving real damping of the reflexes emanating from drilling, which results in the formation of an unwanted oscillating system.
- the supply conduit for pressure liquid is connected to the accumulator and thereby the supply conduit is connected to the damping chamber over said non return valve.
- damping is achieved in correspondence to what is described above.
- the ring surface being provided with at least one float hole for establishing a floating position of the damping piston, it is achieved that the damping piston will act so as to move a strike receiving component, such a drill steel adapter, to a striking position being advantageous for the percussion device, whereby low variation of the percussion energy of the percussion device will be the result.
- the return choking device and/or the second choking device are adjustable for the adaption of the damping device to prevailing requirements of the percussion device.
- the adjustability can be achieved through means that are per se known to the person skilled in the art. In principle, the smaller the area for energy reception that a choking device exhibits, the greater hardness the damper will have .
- Fig. Ia diagrammatically shows an axial section of a damping device according to the invention in a percussion device of a drilling machine
- Figs. Ib and Ic show a detail of damping device in Fig. Ia with the damping piston in different positions
- Fig. 2 diagrammaticalIy shows second embodiment of a damping device according to the invention
- Fig. 3 diagrammatically shows a third embodiment of a damping device according to the invention.
- a damping device in connection with a percussion device, wherein a percussive piston 2 is arranged to act in a striking direction R (to the left in Fig. Ia) on a drill steal adapter 1.
- a damping piston 8 being arranged surrounding a percussive piston 2 acts axially against the drill steal adapter 1 over a drill bushing 3.
- shock wave reflexes will tend to drive the drill steal adapter 1 in a direction opposite to the striking direction R, said shock wave reflexes being transmitted over the drill bushing 3 to the damping piston 8.
- the damping piston 8 has a piston portion 6, which is received in a ring-shaped damping chamber 7, which in turn is positioned radially outside an extended portion 8' of the damping piston 8.
- a flow q of pressure liquid is continuously supplied to the damping chamber 7 from a (not shown) pump through the supply conduit 14.
- an accumulator 13 which can be of a conventional kind, and which has been loaded with a suitable counter-pressure of a gas volume on one side of a flexible membrane, on the other side of which pressure liquid can be supplied/discharged.
- the supply conduit 14 is connected to the damping chamber 7 over a system including a choking device (second choking device) 11, which is connected in parallel to a non return valve 12, which is directed so as to allow a liquid flow to the damping chamber 7 but to prevent flows in direction from the damping chamber 7.
- a choking device second choking device
- non return valve 12 which is directed so as to allow a liquid flow to the damping chamber 7 but to prevent flows in direction from the damping chamber 7.
- a return channel which includes: at least one float hole 10 (suitably two float holes being positioned diametrically to each other and possibly even more float holes) , for ensuring that the damping piston 8 will occupy a desired floating position, a return chamber 9 and a conduit emanating from the return chamber 9, which finally debouches in a tank 5.
- This conduit can possibly include a return choking device 4, which is the case in the embodiments in Figs . Ia and 2.
- the tank 5 can be connected to said pump (not shown) for pressure liquid.
- a certain reflow of liquid to the damping chamber, and thereby reduction of pressure variations there inside, can also to certain extent be obtained through the arrangement of float holes 10, second choking device 16 in the form of a control slot and return chamber 9 when the pressure in the damping chamber momentary is reduced because of a received reflex from the rock.
- a damping piston 8 is shown where it has essentially occupied said floating position, wherein a control edge 6', radially most outwardly on the piston portion 6, in co-operation with a mouth of one (or more) float hole forms a variable float hole choking device 20 in dependence of the axial position of the damping piston.
- the damping piston will move with small axial movements approximately around the position shown in Fig. Ib (the floating position) .
- This control slot 16 is here indicated as a first choking device in a first choking channel of the damping device.
- a pressure increase will occur in the damping chamber 7.
- No liquid will pass through the non return valve, since this non return valve only allow a flow in the direction to the damping chamber. Because of the pressure increase, however, liquid will be pressed on the one hand through the first choking device being comprised of the choking slot 16, on the other hand through the second choking device being comprised of the choking device 11.
- the embodiment in Fig. 2 differs from the one in Fig. Ia only through the absence of the second choking device. In this embodiment, all energy reception is thus in the first choking device 16, as explained above, and which is established during a movement to the right, opposite to the striking direction R of the damping piston 8 from the positioned shown in Fig. 2.
- the embodiment in Fig. 3 differs from the one in Fig. Ia in that the supply conduit for pressure liquid 14 directly adjoins to the damping chamber 7. In this case, all recharging of the accumulator thus is over the second choking device 11. In this case it can also exist that a certain pressure fluctuation in the damping chamber 7 can be transferred into the supply conduit 14.
- the invention can be modified within the scope of the following claims, and as an example the percussion device can be constructed otherwise and even without a conventional percussive piston. In that case it can be a so called impulse machine . Transfer of shock wave reflexes to the damping piston can also be arranged otherwise.
- the components in the machine housing can be arranged otherwise and, for example, the ring- shaped component outside the most extended portion of the damping piston can be an integrated part of the machine housing itself.
- the liquids that are used with the invention are the usual hydraulic liquids for similar applications.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0900045A SE533344C2 (en) | 2009-01-16 | 2009-01-16 | Attenuation device for percussion, percussion and drilling machine |
PCT/SE2009/000508 WO2010082871A1 (en) | 2009-01-16 | 2009-12-04 | Damping device for percussion device, percussion device and drilling machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2379283A1 true EP2379283A1 (en) | 2011-10-26 |
EP2379283A4 EP2379283A4 (en) | 2013-09-04 |
Family
ID=42339986
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09838481.1A Withdrawn EP2379283A4 (en) | 2009-01-16 | 2009-12-04 | Damping device for percussion device, percussion device and drilling machine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2379283A4 (en) |
SE (1) | SE533344C2 (en) |
WO (1) | WO2010082871A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010029918A1 (en) * | 2010-06-10 | 2011-12-15 | Hilti Aktiengesellschaft | machine tool |
SE537838C2 (en) * | 2014-02-14 | 2015-11-03 | Atlas Copco Rock Drills Ab | Damping device for percussion, percussion and rock drill |
CN108367419A (en) * | 2015-12-24 | 2018-08-03 | 古河凿岩机械有限公司 | Hydraulic impact device |
FR3077752B1 (en) * | 2018-02-14 | 2020-01-31 | Montabert | ROTO-PERCUTANT HYDRAULIC PERFORATOR PROVIDED WITH A CONTROL CHAMBER PERMANENTLY CONNECTED TO A LOW PRESSURE ACCUMULATOR |
SE543622C2 (en) | 2019-10-31 | 2021-04-20 | Epiroc Drilling Tools Ab | Pneumatic drill hammer comprising a boost chamber and a drilling rig comprising such a drill hammer |
EP3822037A1 (en) * | 2019-11-15 | 2021-05-19 | Hilti Aktiengesellschaft | Impact device assembly |
FR3120247B1 (en) | 2021-03-01 | 2023-09-29 | Montabert Roger | Hydraulic rotary hammer drill equipped with a stop piston |
FR3120248B1 (en) | 2021-03-01 | 2023-02-10 | Montabert Roger | Hydraulic roto-percussion drill equipped with a stop piston and a braking chamber |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2355617A1 (en) * | 1975-12-18 | 1978-01-20 | Montabert Roger | Percussion tool with bit operated by double acting piston - has stepped dia. annular chamber filled with incompressible fluid to absorb shock |
US4582145A (en) * | 1982-10-08 | 1986-04-15 | Oy Tampella Ab | Pressure-medium driven percussion device |
GB2193919A (en) * | 1986-05-02 | 1988-02-24 | Tampella Oy Ab | Arrangement for the axial bearing of a drilling machine |
US5351763A (en) * | 1990-02-23 | 1994-10-04 | Tamrock Oy | Arrangement for an axial bearing in a drilling machine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3741072A (en) * | 1971-02-17 | 1973-06-26 | G Romell | Hydraulic fluid actuated percussion tool |
SE8604362L (en) * | 1986-10-15 | 1988-04-16 | Atlas Copco Ab | DIMMING DEVICE AT A BEAUTIFUL MOUNTAIN DRILLING MACHINE |
SE508064C2 (en) * | 1993-10-15 | 1998-08-17 | Atlas Copco Rock Drills Ab | Rock drilling device with reflex damper |
US5944120A (en) * | 1997-11-10 | 1999-08-31 | Caterpillar Inc. | Hydraulic hammer assembly having low vibration characteristics |
-
2009
- 2009-01-16 SE SE0900045A patent/SE533344C2/en not_active IP Right Cessation
- 2009-12-04 WO PCT/SE2009/000508 patent/WO2010082871A1/en active Application Filing
- 2009-12-04 EP EP09838481.1A patent/EP2379283A4/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2355617A1 (en) * | 1975-12-18 | 1978-01-20 | Montabert Roger | Percussion tool with bit operated by double acting piston - has stepped dia. annular chamber filled with incompressible fluid to absorb shock |
US4582145A (en) * | 1982-10-08 | 1986-04-15 | Oy Tampella Ab | Pressure-medium driven percussion device |
GB2193919A (en) * | 1986-05-02 | 1988-02-24 | Tampella Oy Ab | Arrangement for the axial bearing of a drilling machine |
US5351763A (en) * | 1990-02-23 | 1994-10-04 | Tamrock Oy | Arrangement for an axial bearing in a drilling machine |
Non-Patent Citations (1)
Title |
---|
See also references of WO2010082871A1 * |
Also Published As
Publication number | Publication date |
---|---|
SE0900045A1 (en) | 2010-07-17 |
WO2010082871A1 (en) | 2010-07-22 |
EP2379283A4 (en) | 2013-09-04 |
SE533344C2 (en) | 2010-08-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20110721 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: JONSSON, ERIK Inventor name: GUSTAVSSON, DANIEL Inventor name: WALLIN, JAKOB Inventor name: LARSSON, FREDRIK |
|
DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20130802 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: B25D 17/24 20060101AFI20130729BHEP Ipc: B25D 17/06 20060101ALN20130729BHEP |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20140301 |