EP0127885A2 - Mécanisme d'impact hydraulique - Google Patents

Mécanisme d'impact hydraulique Download PDF

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Publication number
EP0127885A2
EP0127885A2 EP84106222A EP84106222A EP0127885A2 EP 0127885 A2 EP0127885 A2 EP 0127885A2 EP 84106222 A EP84106222 A EP 84106222A EP 84106222 A EP84106222 A EP 84106222A EP 0127885 A2 EP0127885 A2 EP 0127885A2
Authority
EP
European Patent Office
Prior art keywords
piston
working
chamber
der
cylindrical
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Withdrawn
Application number
EP84106222A
Other languages
German (de)
English (en)
Other versions
EP0127885A3 (fr
Inventor
Georgi Stoyanov Georgiev
Ivan Georgiev Kralev
Vassil Dimitrov Vassilev
Lyubomir Borissov Datchev
Assen Stefanov Horosov
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stopanski Kombinat SA Teshko Mashinostroene
Original Assignee
Stopanski Kombinat SA Teshko Mashinostroene
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Stopanski Kombinat SA Teshko Mashinostroene filed Critical Stopanski Kombinat SA Teshko Mashinostroene
Publication of EP0127885A2 publication Critical patent/EP0127885A2/fr
Publication of EP0127885A3 publication Critical patent/EP0127885A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B25D9/16—Valve arrangements therefor
    • B25D9/20—Valve arrangements therefor involving a tubular-type slide valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid
    • B06B1/183—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid operating with reciprocating masses
    • 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
    • B25D9/06—Means for driving the impulse member
    • B25D9/12—Means for driving the impulse member comprising a built-in liquid motor, i.e. the tool being driven by hydraulic pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2209/00—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D2209/005—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously having a tubular-slide valve, which is coaxial with the piston

Definitions

  • the invention relates to a hydraulic impact mechanism, which is primarily applicable to machines with an impact and destruction effect (crusher, concrete crusher, etc.), but can also be used for different light and heavy break-through hammers.
  • a hydraulic impact mechanism (1) which contains a working cylinder in which a cylindrical distributor sleeve and a piston with a working chamber are arranged.
  • the working cylinder ends at its ends with a front and a rear cover.
  • the working cylinder in turn consists of an outer cylinder and an intermediate cylinder, in which A movable cylindrical distributor sleeve is arranged between the cylinders, which contains a system of ring grooves and openings and concentrically comprises the piston with a symmetrically arranged working ring.
  • the intermediate cylinder is provided with inner ring grooves, which are united by openings with a common outer chamber, which is connected to the container by a central opening.
  • the chamber has feed grooves at both ends, which are connected by openings to the fluid pressure flow in the outer cylinder.
  • the distributor bushing is reversed by a pressure drop in the respective working chamber at the end of the working or the return of the piston and at the same time with the pressure increase in the opposite chamber, caused by the impact pulse of the moving piston and the entry of a certain fluid pressure through the throttle openings in the distributor box.
  • a disadvantage of the known impact mechanism is that a throttle supply to the working chamber is necessary to ensure the necessary pressure drop when reversing the distributor sleeve and that to eliminate the balance of the distributor sleeve at the time of reversing, part of the kinetic energy of the piston is consumed, which in the process of is essential.
  • the piston ends also protrude outside the working chamber and the last are hermetically sealed with rubber or plastic sleeve seals, which are characterized by low reliability.
  • the object of the invention is to develop a hydraulic impact mechanism through which the same the necessary pressure drop is ensured at an early stage with the automatic distribution of the working fluid, the kinetic energy obtained being used only for the operation of the piston and there is no need for rubber and plastic sleeve seals at the piston ends.
  • a hydraulic striking mechanism in which, according to the invention, a front and a rear guide sleeve are located at both ends of the intermediate cylinder, which are arranged in front of the respective end of the cylindrical distributor sleeve, which surround the cylindrical piston in such a way that a rear and a front working chamber and a central piston opening are formed, which connects the rear and front pressure chamber.
  • a rear and a front working chamber and a central piston opening are formed, which connects the rear and front pressure chamber.
  • it is arranged in the middle of a sleeve and the end of the working tool is compressed by a rear sleeve compression, under the limiting ring of which a support chamber is formed.
  • the support chamber is permanently connected to the front pressure chamber through the axial and inclined opening drilled at the end of the working tool.
  • Lattice sleeves and cylindrical pneumatic accumulators which are filled with neutral gas, are installed in the pressure chambers.
  • the invention has the following advantages: the reversing of the distributor sleeve at the end of the working and the return takes place impulsively due to the movement of the piston, the back of the sleeve being realized at a time when the respective working chamber is connected to the container and the entry of the pressurized fluid is interrupted in time. This ensures that the distributor bushing can be reversed freely and safely.
  • the rear cylindrical piston end has a larger diameter than the front end, which ensures an accelerated movement in one operation even during the reversing of the distributor sleeve without being accompanied by a loss of kinetic energy.
  • compression sleeves used in the present case to hermeticize the end of the breakthrough tool operate in much more favorable conditions due to the insignificant importance of the tool and it can be expected that their reliability will be significantly higher.
  • An exemplary embodiment of the invention is on the enclosed figure shown, which shows a cross section of the impact mechanism with a diagram of the feed.
  • the hydraulic striking mechanism consists of a working cylinder, which is composed of an outer (1) and an intermediate cylinder (2) with a front (3) and a rear guide bush (4).
  • a cylindrical distributor sleeve (5) with rear outlet openings (6), middle outlet openings (7) and front outlet openings (8) which the cylindrical piston (9) with a central working ring with a rear Edge (10) and a front edge (11), a feed cutout with a rear edge (12) and a front edge (13), a front feed cutout with a rear edge (14) and a front edge (15) and a central opening (16).
  • the working cylinder is closed with a front (17) and a rear cover (18).
  • a front pressure chamber (22) was formed in the front part by means of the same grating sleeve (19), which is connected to the rear pressure chamber by a central opening (16) of the piston (9).
  • cylindrical pneumatic accumulators (23) are arranged, which are filled with neutral gas.
  • a work tool (24) with a limiting ring (25) is mounted in the front pressure chamber (22) by means of a bush (26).
  • front pressure chamber (22) connects to the support chamber (33) by means of the central opening (31) and the inclined opening (32) in the working tool (24).
  • the intermediate cylinder (2) contains a rear (34) and a front ring groove (35), which are connected by a common ring groove (36) by means of front (37) and rear openings (38).
  • the intermediate cylinder contains a front (39), a middle (40) and a rear ring groove (41), connected to a common ring groove (45) by means of front (42), middle (43) and rear openings (44) .
  • the intermediate cylinder (2) contains a front (46) and a rear annular groove (47), which are connected to the common annular groove (50) by means of front (48) and rear openings (49).
  • the rear guide bush (4) contains openings ( 51) which connect the rear pressure chamber (20) to the rear ring groove (34)
  • the front guide bushing (3) contains openings (52) which connect the front pressure chamber (22) to the front ring groove (46) the piston (9) has a rear working chamber (53) and in front of the central working ring - a front working chamber (54).
  • the piston moves further forward (to the right in the illustration) under the influence of the kinetic energy obtained.
  • the distributor sleeve (5) begins to move backwards (to the left in the illustration) as a result of the rear working chamber (53) being connected to the container (21) and into the front working chamber (54) by the piston moving forward Impulse arises.
  • the rear col benende has a larger diameter than the front, an active force will continue to act on the piston in the direction of the stroke and this will also accelerate during the reversing of the sleeve (5) without no loss of kinetic energy.
  • the piston travels a substantial distance before the front edge of the sleeve detects the rear annular groove (47) and connects the front working chamber (54) to the front pressure chamber (22). It is precisely in this interval that the working tool (24) is struck in order to avoid the loss of kinetic energy.
  • a striking element in this construction is the behavior of the working tool (24), determined by the ratio between the active area of the piston-knocking end and hermetically sealed with a rear compression sleeve (29) and the surface of the support chamber (33), hermetically sealed with a front Compression sleeve (28).
  • the breakthrough tool is in a floating regime while working and the vibrations caused by the blow are practically not transferred to the machine body, which creates conditions for the substantial reduction of the vibrations of the breakthrough complex.
  • the proposed scheme of a hydraulic striking mechanism is also applicable when the ends of the Pistons (9) emerge outside the front (22) and the rear pressure chamber (20), which are hermetically sealed with compression sleeves, as is the case with all constructions known to date.
  • the central opening (16) of the piston is isolated and does not play the role of a connecting groove.
  • the supply of the front (22) and rear pressure chamber (20) is direct and is realized by the grooves in the inner cylinder (1).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)
EP84106222A 1983-05-30 1984-05-30 Mécanisme d'impact hydraulique Withdrawn EP0127885A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BG6113983A BG38433A1 (en) 1983-05-30 1983-05-30 Hydraulic percussion mechanism
BG61139/83 1983-05-30

Publications (2)

Publication Number Publication Date
EP0127885A2 true EP0127885A2 (fr) 1984-12-12
EP0127885A3 EP0127885A3 (fr) 1986-12-10

Family

ID=3912264

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84106222A Withdrawn EP0127885A3 (fr) 1983-05-30 1984-05-30 Mécanisme d'impact hydraulique

Country Status (3)

Country Link
EP (1) EP0127885A3 (fr)
BG (1) BG38433A1 (fr)
HU (1) HU197784B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0597813A1 (fr) * 1992-11-11 1994-05-18 Atlas Copco Rocktech Ab Marteau de forage hydraulique
AT403531B (de) * 1994-08-10 1998-03-25 Chemiefaser Lenzing Ag Vorrichtung zum regeln des druckes in einer strömenden, viskosen masse
WO2012075214A1 (fr) * 2010-12-02 2012-06-07 Caterpillar Inc. Ensemble manchon/chemise et marteau-batteur hydraulique l'utilisant
WO2014150473A1 (fr) * 2013-03-15 2014-09-25 Caterpillar Inc. Marteau hydraulique ayant un accumulateur et un piston coaxiaux
WO2014150521A1 (fr) * 2013-03-15 2014-09-25 Caterpillar Inc. Marteau hydraulique ayant un sous-ensemble de système d'impact
CN103352958B (zh) * 2013-07-02 2016-03-23 太原理工大学 一种液压缸的缓冲装置
US9822802B2 (en) 2013-03-15 2017-11-21 Caterpillar Inc. Accumulator membrane for a hydraulic hammer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE536289C2 (sv) * 2011-04-05 2013-08-06 Atlas Copco Rock Drills Ab Hydrauliska slagverk för berg- eller betongavverkande utrustning samt borr- och brytutrustning

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU27475A1 (ru) * 1928-08-09 1932-08-31 А.И. Медведев Прибор дл определени горизонтального положени помощью визировани по градуированной рейке
DE1503222A1 (de) * 1965-04-23 1969-04-03 Vickers Ltd Hydraulisch betriebenes Werkzeug
DE1628054B1 (de) * 1967-09-04 1971-05-06 Worthington Corp Hydraulisch angetriebene Schlagvorrichtung
DE2443800A1 (de) * 1973-09-14 1975-03-20 Roxon Oy Hydraulisch betriebene schlagvorrichtung
FR2328547A1 (fr) * 1975-10-20 1977-05-20 Tampella Oy Ab Appareil de percussion hydraulique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU27475A1 (ru) * 1928-08-09 1932-08-31 А.И. Медведев Прибор дл определени горизонтального положени помощью визировани по градуированной рейке
DE1503222A1 (de) * 1965-04-23 1969-04-03 Vickers Ltd Hydraulisch betriebenes Werkzeug
DE1628054B1 (de) * 1967-09-04 1971-05-06 Worthington Corp Hydraulisch angetriebene Schlagvorrichtung
DE2443800A1 (de) * 1973-09-14 1975-03-20 Roxon Oy Hydraulisch betriebene schlagvorrichtung
FR2328547A1 (fr) * 1975-10-20 1977-05-20 Tampella Oy Ab Appareil de percussion hydraulique

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0597813A1 (fr) * 1992-11-11 1994-05-18 Atlas Copco Rocktech Ab Marteau de forage hydraulique
AT403531B (de) * 1994-08-10 1998-03-25 Chemiefaser Lenzing Ag Vorrichtung zum regeln des druckes in einer strömenden, viskosen masse
US5826978A (en) * 1994-08-10 1998-10-27 Lenzing Aktiengesellschaft Device and method for controlling pressure in a flowing viscous mass within a system for processing cellulose solutions
CN103347657B (zh) * 2010-12-02 2015-11-25 卡特彼勒公司 套筒/衬套组件和使用该套筒/衬套组件的液压锤
CN103347657A (zh) * 2010-12-02 2013-10-09 卡特彼勒公司 套筒/衬套组件和使用该套筒/衬套组件的液压锤
US8733468B2 (en) 2010-12-02 2014-05-27 Caterpillar Inc. Sleeve/liner assembly and hydraulic hammer using same
WO2012075214A1 (fr) * 2010-12-02 2012-06-07 Caterpillar Inc. Ensemble manchon/chemise et marteau-batteur hydraulique l'utilisant
WO2014150473A1 (fr) * 2013-03-15 2014-09-25 Caterpillar Inc. Marteau hydraulique ayant un accumulateur et un piston coaxiaux
WO2014150521A1 (fr) * 2013-03-15 2014-09-25 Caterpillar Inc. Marteau hydraulique ayant un sous-ensemble de système d'impact
CN105026111A (zh) * 2013-03-15 2015-11-04 卡特彼勒公司 具有同轴蓄能器和活塞的液压锤
US9555531B2 (en) 2013-03-15 2017-01-31 Caterpillar Inc. Hydraulic hammer having co-axial accumulator and piston
US9592598B2 (en) 2013-03-15 2017-03-14 Caterpillar Inc. Hydraulic hammer having impact system subassembly
US9822802B2 (en) 2013-03-15 2017-11-21 Caterpillar Inc. Accumulator membrane for a hydraulic hammer
US10562166B2 (en) 2013-03-15 2020-02-18 Caterpillar Inc. Hydraulic hammer having co-axial accumulator and piston
CN103352958B (zh) * 2013-07-02 2016-03-23 太原理工大学 一种液压缸的缓冲装置

Also Published As

Publication number Publication date
BG38433A1 (en) 1985-12-16
HUT34801A (en) 1985-04-28
HU197784B (en) 1989-05-29
EP0127885A3 (fr) 1986-12-10

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Inventor name: GEORGIEV, GEORGI STOYANOV

Inventor name: VASSILEV, VASSIL DIMITROV

Inventor name: HOROSOV, ASSEN STEFANOV

Inventor name: KRALEV, IVAN GEORGIEV

Inventor name: DATCHEV, LYUBOMIR BORISSOV