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Pneumatic percussion mechanism Percussion mechanism includes a cylindrical housing with a sleeve and outlet channels, a working tool with a shank, a stepped piston with stock and main parts with a central channel and a sleeve with a longitudinal channel-slot and a hole in the stock part of the piston, which divides the cylindrical housing cavity into an annular chamber on the side of stock part of the piston, an idle stroke chamber on the side of the working tool shank and an annular distributing chamber in the sleeve of the cylindrical housing on the side of the piston stock part, an annular flange with air supply holes to the annular distributing chamber and a through axial channel for passage of the rod with a shutoff valve, a fastening shell fixed relative to the cylindrical housing, a network air chamber formed with the shell with and air supply channel and an annular flange, which is fixed in the through axial channel of the annular flange, the rod with the shutoff valve that constantly interacts with a longitudinal channel-slot in the hole of the sleeve located in the central channel of the piston, which connects periodically, depending on position of the stepped piston, the annular distributing chamber and the idle stroke chamber to each other. In the section of interaction of the annular stage of the cylindrical housing sleeve with the stock part of the piston there is an annular gap with a design flow cross-section, and on stock part of the piston there is a throttling bypass channel-slot that constantly connects the annular distributing chamber to the annular chamber. |
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Pneumatic percussion mechanism Mechanism includes a cylindrical housing with a sleeve and outlet channels, a working tool with a shank. A stepped piston with stock and main parts with a central channel and a sleeve with a longitudinal channel-slot and a hole in a stock part of the piston, which divides the cylindrical housing cavity into an annular distributing chamber in the sleeve of the cylindrical housing on the side of stock part of the piston and the idle stroke chamber on the side of the working tool shank. An annular flange with air inlet holes to the annular distributing chamber and a through axial channel for passage of a rod with a shutoff valve, a fastening shell fixed relative to the cylindrical housing. Network air chamber is formed with a fastening shell with an air supply channel and an annular flange fixed in the through axial channel of the annular flange, the rod with the shutoff valve, which constantly interacts with the longitudinal channel-slot in the hole of the sleeve located in the central channel of stepped piston, which connects periodically, depending on position of the stepped piston, the annular distributing chamber and the idle stroke chamber to each other. In the section of interaction of the annular stage of the cylindrical housing sleeve with the stock part of the piston there is an annular gap with a design flow cross-section, and on inner side surface of the sleeve there is a throttling bypass channel-slot along a generatrix, which constantly connects the annular distributing chamber to the annular chamber. |
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Cylindrical-pseuodospherical hammer Invention relates to hammers of percussion-type machines. Proposed hammer consists of interconnected cylinder and coaxial rod. Rod side surface makes the surface of permanent negative curvature surface formed by rotation of equitangential curve about its asymptote. |
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Invention relates to machine building, particularly, to drilling machine heads. Proposed head comprises generating part with lateral generating surface confined by sensor and convex impact end faces. Said convex impact end face features surface composed by revolution of catenary with parameters a=(3…20)D where d is head impact face diameter around head lengthwise axis. |
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Invention relates to machine building, particularly, to percussion machine heads. Proposed head comprises cylindrical piston and impact taper parts. Transition between head cylindrical and taper parts is made in arc of circle. Relationship between taper impact part l1 and cylindrical piston part l2 is defined as follows to ensure position of head center of gravity at its piston cylindrical part: where d is head impart face diameter, D is diameter of head idle face. |
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Pneumatic device of impact action includes a cylindrical body with a bushing and outlet channels, a working tool with a tail, a stepped piston with stem and main parts with a central channel and a bushing with a longitudinal channel-slot and a hole in a stem part of the piston, which separates the cavity of the cylindrical body into a circular distribution chamber in the bushing of the cylindrical body at the side of the stem part of the piston and an idle chamber at the side of the working element tail, a circular flange with holes of air supply into the circular distribution chamber and a through axial channel for passage of a rod with a stop valve, a fastening sleeve fixed relative to the cylindrical body, a network air chamber formed by the fastening sleeve with the air supply channel and the circular flange, a rod with a stop valve fixed in the through axial channel of the circular flange, which continuously interacts with the longitudinal channel-slot in the hole of the bushing arranged in the central channel of the stepped piston, which connects from time to time, depending on the stepped piston position, the circular distribution chamber and the idle chamber to each other. In the section of interaction of the circular stage of the bushing of the cylindrical body with the stem part of the piston there is a circular gap with a rated throughput section, and on the inner side surface of the bushing there is a throttling helical channel-slot arranged along its entire length, which continuously communicates the distribution chamber with the circular chamber. |
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Pneumatic impact mechanism is designed for application in impact machines of different purpose. It comprises a cylindrical body with a bushing and outlet channels, a working tool with a tail, a stepped piston with stem and main parts with a central channel and a bushing with a longitudinal channel-slot and a hole in the stem part of the piston, which separates the cavity of the cylindrical body into a circular chamber at the side of the stem part of the piston, an idle chamber at the side of the working tool tail and a circular distribution chamber in the bushing of the cylindrical body at the side of the stem part of the piston, a circular flange with holes of air supply into the circular distribution chamber and a through axial hole for passage of a rod with a stop valve, a fastening sleeve fixed relative to the cylindrical body, a network air chamber formed by the sleeve with an air-supply channel and a circular flange, a rod with a stop valve fixed in the through axial channel of the circular flange, which permanently interacts with the longitudinal channel-slot in the hole of the bushing being located in the central channel of the piston, connecting periodically, depending on the stepped piston position, the distribution chamber and the idle chamber between each other. In the section of interaction of the circular step of the cylindrical body bushing with the stem part of the piston there is a circular gap with a rated throughput section, and on the stem part of the piston there is a throttling relief helical channel-slot, which permanently communicates the distribution chamber with the circular chamber. |
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Impact device comprises a body with holes, a striker with longitudinal channels on the external surface installed in the body as capable of displacement, chambers of forward and reverse stroke, a channel in a striker to communicate chambers of forward and reverse stroke, a stop inner surface of the body with a front circular ledge and a reverse stroke limiter on its rear part, an elastic ring, installed in the circular groove on the striker as capable of interaction with the stop inner surface of the body. The stop inner surface of the body is equipped with a conical surface arranged between the front circular ledge and its rear part and coupled with them, besides, between the surface of the rear wall of the circular groove and the end surface of the elastic ring there is a sharp angle formed, the top of which is directed towards the striker axis. The sharp angle is formed by arrangement of the rear wall surface of the circular groove as conical. The sharp angle is formed by arrangement of the end surface of the elastic ring at the side of the rear wall of the circular groove as conical. The front wall of the circular groove has smaller diametre than its rear surface. The walls of the circular groove are formed by two collars on the external surface of the striker. The external surface of the elastic ring is arranged as conical and faces backwards with its smaller diametre. The rear part of the stop inner surface of the body is arranged as cylindrical or conical. The body is arranged with an anvil, besides, the stop inner surface is arranged in the anvil, and the front circular ledge, the specified conical surface and the reverse stroke limiter - on this surface. The elastic ring is installed in the circular groove with tight fit. |
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Pneumatic impact mechanism comprises a cylinder with outlet channels, a working tool with a tail, a stepped striker with a stem and a main parts with a central through channel and a bushing with a slot channel in the stem part of the striker, separating the cylinder cavity into an idle chamber at the tail side, a distribution chamber at the side of the stem part of the striker, a circular chamber of a forward stroke, a network air chamber, a circular cover installed between the network air chamber and the distribution chamber with a channel of air supply from the network air chamber into the distribution chamber, a rod rigidly fixed relative to the cover with a piston part, which is permanently installed in a central through channel of the striker, interacting with the slot channel of the bushing, connecting periodically, depending on the position of the stepped striker, the distribution chamber and the idle chamber between each other. The distribution chamber and the circular chamber of the forward stroke are permanently communicated to each other with a circular throttling channel, coaxially to the distribution chamber there is a sleeve installed, forming an additional circular chamber of an attached volume, permanently communicated with a relief channel to the circular chamber. |
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Air impact mechanism consists of cylinder case with outlet channels and installed in it bushing and of stepped striker with rod and main parts, with through orifice and bushing in rod part with channel-slot dividing cavity of case to chamber of idle run on side of shank end and circular working chamber. Further, the mechanism consists of a circular flange with channels supplying air from a network camera, of the rod rigidly secured relative to the circular flange and continuously inserted in a through orifice of the striker and interacting with the channel-slot of the bushing and of a working tool with the shank end. The impact mechanism has a circular distributing chamber on one side communicated with the network camera by means of air supplying channels of the circular flange and on another side continuously communicated with the circular chamber of working stroke by means of a circular throttle channel formed with a bushing of the impact mechanism and a rod part of the striker. Also, the rod is alternately communicated depending on position between the stepped striker of the circular distributing chamber and the idle stroke chamber. |
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Device for making wells in soil Device for making wells in soil includes body, anvil, striker, tail, accessories for air relief in process of direct and reverse travel of pneumatic drill and fixation of hose. Along anvil axis there is a channel arranged, besides the end of anvil near bottomhole is directly plugged, and channel communicates to adjacent layers of soil with the help of one ore several holes in side part of anvil. |
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Proposed here is an impact device for a bore hammer or similar device, with apparatus for transferring impact load or tension impulse to an instrument, linked to the impact device. The apparatus for transferring the tension impulse comprises striking element (2), fixed to housing (1a) of the impact device, and apparatus for applying tension on the striking element and, respectively, for sudden release of tension from striking element (2), after which the strain energy is released in form of a tension impulse, directed to instrument (3), which is directly or indirectly joined to the striking element. |
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Invention can be used for drilling bore holes in any rocks with hard inclusions, for instance, apatite nepheline ore. Proposed perforator contains rock breaking tool-bar with crow bit, housing accommodating rotary mechanism and twin hammer consisting of main and auxiliary strikers, air distributing system, rotary and end boxes. Auxiliary striker is installed in guides. Its section has from of polyhedron, and ratio of striker length L to its width b is chosen from L/b>1.5. Ratio of masses of twin hammer and bar should satisfy condition m2>m1(2R+R2). |
Another patent 2513688.