Method of adjustment of percussion machine impact frequency and power

FIELD: process engineering.

SUBSTANCE: invention relates to machine building, particularly to advisement of percussion machine impart frequency and poser. Said machine comprises case, hammer with discharge openings that form with the case the hammer forward stroke chamber and hammer backstroke chamber, inertial-friction valve with outlets and seal to reciprocate over the rod secured at hammer, working fluid source arranged to force working fluid into backstroke chamber. Working fluid is forced into backstroke chamber in controlled portions to make hammer with said inertial-friction valve reach the height in said case sufficient to deliver required impact power. Working fluid fed into said backstroke chamber is terminated to allow down travel of the hammer under action of gravity forces. Said inertial-friction valve is retained at top position at rod of the hammer under friction forces acting between the case and valve seal at hammer down travel to close discharge openings of the hammer and inertial-friction valve communicating both aforesaid chambers. It allows the travel of inertial-friction valve travel after hammer over the rod and closure of openings of hammer and said valve at hammer bottom position.

EFFECT: power savings, expanded applications.

2 cl, 1 dwg

 

The technical solution relates to mechanical engineering and can find application in mining with blasting monoliths, in the construction of the renovation of existing foundations, as well as in seismic exploration as a mechanical excitation source of seismic waves.

A known method of regulating the frequency and impact energy pneumatic percussion machine implemented in a pneumatic percussion mechanism (A.S. USSR №395251, B25d 17/00, publ. 07.01.1974), in which compressed air is fed to the camera forward stroke, through a calibrated orifice in the piston-drummer - in the back-stroke chamber, moving the piston-drummer in the upper position (in the drawing). To strike open the manual shutoff valve, relieving the pressure under the piston-drummer. Under the action of air pressure in the chamber forward movement and gravity piston-drummer strike at the head of the handpiece. When removing the load manually the valve under the action of the spring closed.

The disadvantage of this method is its low efficiency as a result of lower energy, frequency and stability of shock due to manual control and constant communication cameras direct and reverse the orifice which leads to wasteful consumption of compressed air, creating a compression pads in the back-stroke chamber before impact and, consequently, to decrease the power and pneumatic percussion machines. In addition, the control method reduces the reliability of its work, since all the blow passed through a check valve, quickly damaging the latter. The implementation of this method requires making quite complex, high-precision mechanism, which increases manufacturing technology known machines.

The closest in technical essence and essential features for the proposed solution is the way to control the frequency and impact energy of the shock machine implemented in the percussion device described in the patent of Russian Federation №2085363, B25D 9/04, F21C 3/24, E02F 5/18, publ. 27.07.97. In this way the compressed air through the inlet opening serves in the camera forward stroke, moving the drummer in the extreme forward position, with the back-stroke chamber communicated with the atmosphere through the exhaust channel. In the extreme forward position of the striker automatically or manually close the outlet channel open by pressure in the chamber forward stroke of the inertial and frictional valve connecting the camera backward and forward movement, and due to the difference of the squares of the drummer in the camera forward and reverse vzvoda drummer in the rearmost position. Then open the outlet, the pressure of the striker moves forward to strike. Through the forces of friction and inertia close inertial and frictional valve cover is so camera forward and reverse from each other. After impact, the inertial and frictional valve open due to the inertia of the past and the compressed air begins to flow from the chamber forward stroke in the back-stroke chamber.

The disadvantage of this technical solution is the inability to control the frequency and impact energy, because the shifting is carried out in accordance with the position of the striker, which reduces the efficiency of the method. The implementation of the method is possible only in machines with a constant supply of compressed air, which limits the possibilities of the method, since the periodic supply of compressed air will not provide for the actuation of the inertia-friction valve. With the constant supply of compressed air is loss of communication when switching drum machine, which reduces the efficiency of the method, because it leads to additional consumption of compressed air.

This method can only be implemented in machines with complex multi-stage impactor, the difference of which provides its movement. This increases the cost of the method and reduces its reliability due to the inevitable formation of stress in the body and the drummer, which lead to the breakage of the product. In addition, this method cannot be implemented in seismic work, because in its implementation due to the constant feed with whom ATAGO air in the shock machine it is impossible to prevent a re-kick.

The technical objective of the proposed method of regulating the frequency and impact energy impact machine is its efficiency by reducing energy consumption and extending the scope (different working environment, the opportunity to struggle with the re-kick). Additional effect : enhanced reliability by simplifying the shock mechanisms in which the proposed method is implemented.

The task is solved in that in the method of regulating the frequency and impact energy impact machine, comprising a housing, a drummer with the exhaust Windows, formed with the camera body backward and forward movement of the striker, inertial and frictional valve with exhaust Windows and seal made with the possibility reciprocating movement of the rod attached to the drummer, the source of the working environment, made with the possibility of supplying fluid into the chamber reverse drummer, including the supply of working medium in the camera-reverse striker, stopping the supply of the working medium in the camera reverse drummer and waste diversion working environment, in accordance with the technical the decision flow of the working medium in the camera-reverse striker carried out using the source control of the working environment and the solenoid adjustable portions to achieve the drummer from touching it inertial drag the second valve height in the housing, necessary to achieve the specified impact energy, stop the flow of operating medium in the camera-reverse striker to move the striker down under the force of gravity for applying the drummer kick in its lowest position, ensure the retention of the inertial and frictional valve in the upper position fixed on the striker rod under the action of frictional forces acting between the housing and the seal of the inertial and frictional valve, the motion of the striker down to the exhaust opening Windows on the drummer and the inertial and frictional valve connecting the camera backward and forward movement of the striker, and provide inertial and frictional valve for the drummer on the rod and closure exhaust boxes on the drummer and the inertial and frictional valve in the lower position of the striker.

This set of features can significantly change the operation mode of the shock machine: the possibility to control the frequency and impact energy, since the switching of the inertial and frictional valve depending on the direction of the velocity of the striker shoots geometric constraints in the design of the drum machine. The stroke of the striker can be of any length and does not depend on the position of drummer in the body, as in the prototype. Adjustable portions of the working environment cocking of the striker provide a modified e is ergie and frequency shock shock machine in a very wide range, because changing the size of the portions of the working environment and the frequency of their submission to the camera-reverse drum machine allows you to maneuver the frequency and height of the cocking of the striker. Adjustable portions of the working environment to avoid loss of energy to its supply in the back-stroke chamber, in comparison with a constant supply in the prototype, which significantly increases the efficiency of the proposed method. Improving the reliability of the method is achieved by the possibility of its use in a simpler and therefore more reliable, percussion mechanisms, where the drummers do not have complex configurations, and therefore, more durable and less costly. The proposed method of frequency control and power beats drum machine allows you to use any working environment (compressed air, hydraulics, vacuum, etc.) unlike the prototype, where the effect of design features you can use only compressed air, which expands the area of application of the method. The use of a control unit for adjusting the frequency and impact energy impact machine also contributes to the efficiency and reliability of the method.

It is expedient in the camera-reverse striker after his kick serve an additional portion of the working environment to prevent re-strike, which is very harmful in certain types of work, such as seismic exploration.

The essence of the technical solution is illustrated by the example of the method for adjusting the frequency and impact energy impact machine and drawing, which shows a diagram of the implementation of the proposed method.

To implement the method of the shock machine includes a housing 1, a drummer 2 with exhaust Windows 3, forming with the housing 1 of the camera 4 direct and reverse 5 stroke of the striker 2, the inertial and frictional valve 6 (hereinafter, the valve 6 with the exhaust Windows 7 and the seal 8. The valve 6 is made with the possibility of reciprocating movement of the rod 9 fixed to the striker 2. The source 10 of the working environment (hereinafter - the source 10) is arranged to feed fluid into the chamber 5 reverse drummer 2 through the solenoid 11. The flow of the working medium is carried out using block 12 control source 10 and the solenoid 11. Box 13 camera 4 forward stroke of the striker 2 is connected with the atmosphere.

The method of regulating the frequency and impact energy impact machine implemented as follows. In the initial position, the striker 2 is at the front (bottom drawing) position. The valve 6 is pressed against the striker 2 and closes the exhaust port 3 and 7, by isolating the camera 4 direct and reverse 5 move away from each other. The source 10 through block 12 configured to control the interval of the working condition required for intake into the chamber 5 reverse then the AI working environment through the solenoid 11 to obtain a given impact energy. When switching on the power source 10 and the opening of the valve 11 into the chamber 5 reverse serves adjustable portion of the working environment, cocking his drummer 2, until it reaches the height of the housing 1, is required to achieve the specified impact energy. When reaching this height, since the working fluid from the source 10 is terminated by the control block 12, under the action of the gravitational force to start the movement of the striker 2 down (drawing) for applying drummer 2 strokes in the lower position, i.e. there is a change in the direction of its velocity. Because the weight of the valve 3 is significantly less than the weight of the striker 2, the friction force generated between the housing 1 and the seal 8, the hold valve 6 in the top position on the rod 9 when the movement of the striker 2 down, thus opening the exhaust boxes 3 and 7. Connect cameras and reverse 5 direct 4 stroke and the exhaust stroke of the working medium from the chamber 5 reverse through the chamber 4 forward stroke and Windows 3 and 7 to the atmosphere through the window 13 when the pneumatic or in the drain tank when hydraulics - not shown). In the lowest position drummer 2 strikes on the working tool (not shown), the valve 6 by inertia moves the striker 2 on the rod 9 and closes the exhaust port 3 drums 2 and 7 on the inertial friction of the valve 6 in the lower position of the striker 2. The cycle repeats.

DL the expansion of the possibilities of using the method involves applying additional portions of the working environment in the chamber 5 reverse. A small additional portion of the working medium supplied from the source 10 through the valve 11 into the chamber 5 reverse drummer 2 after his stroke, prevents the possibility of re-strike and allows the use of the method of regulating the frequency and impact energy impact machine in various fields, where the second kick is harmful, for example, if the seismic survey.

1. The method of regulating the frequency and impact energy impact machine, comprising a housing, a drummer with the exhaust Windows, formed with the camera body forward stroke and return stroke of the striker, inertial and frictional valve with exhaust Windows and seal made with the possibility reciprocating movement of the rod attached to the drummer, the source of the working environment, made with the possibility of supplying fluid into the chamber reverse drummer, including the supply of working medium in the camera-reverse striker, stopping the supply of the working medium in the camera reverse drummer and waste diversion working medium, characterized in that the supply of the working environment in the camera-reverse striker carried out using the source control of the working environment and the solenoid adjustable portions to achieve the drummer from touching it, the inertial and frictional valve height in the body, necessary to ensure that C is a given impact energy, stop the flow of operating medium in the camera-reverse striker to move the striker down under the force of gravity for applying the drummer kick in its lowest position, ensure the retention of the inertial and frictional valve in the upper position fixed on the striker rod under the action of frictional forces acting between the housing and the seal of the inertial and frictional valve, the motion of the striker down to the exhaust opening Windows on the drummer and the inertial and frictional valve connecting the camera backward and forward movement of the striker, and provide inertial and frictional valve for the drummer on the rod and the closure of the exhaust window on the drummer and inertial friction the valve in the lower position of the striker.

2. The method according to claim 1, characterized in that the camera-reverse striker after his kick serves an additional portion of the working environment to prevent re-strike.



 

Same patents:

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Impact mechanism // 2286226

FIELD: plastic metal working; impact-type mechanisms for stamping, riveting and striking the gates.

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Pneumatic hammer // 2423221

FIELD: process engineering.

SUBSTANCE: invention relates to impact tools to be used in mining and construction. Proposed pneumatic hammer comprises hollow cylinder with discharge channel, striker, handle, discharge chamber with air deflector casing and discharge channel, working member and intermediate stepped anvil. Said striker divides cylinder inner space into working and idle stroke chambers with inlet channels. Anvil is arranged between striker and working member stem. Pneumatic buffer is arranged on anvil smaller step side. Annular mesh chamber is arranged on anvil larger step side to be communicated with hollow cylinder wall inlet channel. Said chamber has air distributor built in handle. Anvil central step has its face surface facing idle stroke chamber. Pneumatic buffer and mesh chambers are intercommunicated via bypass channel in anvil smaller-step body with deflecting edge on side surface of said smaller step. Deflector edge is periodically shut off by hollow cylinder on pneumatic buffer chamber side.

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15 cl, 14 dwg

FIELD: process engineering.

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9 cl, 9 dwg

Air hammer // 2410234

FIELD: machine building.

SUBSTANCE: air hammer consists of hollow cylinder with outlet channel, of striker dividing cavity of cylinder to chambers of working and idle strokes with inlet channels, of handle with devices for inlet and air distribution between chambers, of inlet chamber with air fending jacket and inlet channel and of operating tool with shank end. An intermediate stepped anvil is positioned between the striker and the shank end of the operating tool. A chamber of an air buffer is located on the side of less step of the anvil. From the side of a bigger step of the anvil there is arranged a circular network camera communicated with the distribution device in the handle with inlet channel in a wall of the cylinder. The middle step of the anvil with its end area faces the chamber of the idle stroke. Also, the middle step of the anvil has an air-escape channel with an outlet into the idle-stroke chamber and inlet on a section of side surface, this inlet is periodically overlapped with the cylinder from the side of the circular network camera.

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8 cl, 7 dwg

Impact device // 2400350

FIELD: construction.

SUBSTANCE: invention relates to mining and construction equipment - to pneumatic impact devices, is used to break rocks, to drive rod elements into soil, etc. Device comprises vessel with holes, striker with longitudinal channels, chambers of forward and backward motion, exhaust system, inertial valve installed with the possibility of axial motion in specified channel until ledge in it, seat of inertial valve arranged in this channel at the side of forward motion chamber, elastic bush installed in the same valve, and support bushing installed between inertial valve and elastic bush.

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11 cl, 9 dwg

Pneumatic chipper // 2396428

FIELD: construction.

SUBSTANCE: invention relates to mining and construction. Chipper comprises handle, barrel equipped with holes, intermediate link, valve, valve cover, striker, chamber of working travel arranged along longitudinal axis of barrel formed by valve cover and inner surface of barrel, where striker is installed with the possibility of displacement, and idle run chamber arranged inside barrel coaxially to working travel chamber, circular chamber, jacket with holes. Intermediate link is made of jacket and bushing, joined as a whole, mechanism of gas distribution is made of parts, which perform functions of box and seat, and also from cover and valve, inside jacket there is an expansion chamber formed by inner surface of jacket and jacket seal adjacent to external surface of barrel. Working travel chamber communicates with idle run chamber with the first axial hole arranged in inner part of barrel, and idle run chamber communicates with expansion chamber with the second axial opening arranged in outer part of barrel, box and seat of gas distribution mechanism are functionally combined and arranged in the form of valve barrel, and intermediate link is arranged with circular chamber formed as circular bore at the end of intermediate link inverted to handle. Intermediate link is arranged with circular chamber formed as circular bore at the end of intermediate link inverted to handle. Circular bore is also arranged between outer surface of intermediate link and inner surface of barrel and communicates with outer external surface of valve body. Valve body is equipped with bushing fixed on its external surface. There is a central hole arranged in valve body, as well as radial holes. There are crosswise slots communicated with circular chamber by means of circular bore arranged between opposite ends of valve body and valve cover. Valve is installed in area of slots crossing with the possibility to open-close central hole. Radial holes are communicated with chamber of working travel by means of joined holes arranged in valve body, in cover, in barrel bore and arranged along longitudinal axis between slots. Barrel bore communicates with chamber of working travel by means of hole arranged inside barrel between bore and part of working travel chamber, which is most remote from valve cover. Body is arranged from elastic material and is equipped with external ledges. Jacket seal comprises holes to exhaust spent air arranged longitudinally between external surface of barrel and seal of jacket and are inverted from handle.

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5 cl, 8 dwg

FIELD: technological processes.

SUBSTANCE: invention is related to construction equipment and is intended for destruction of hard materials with manmade and natural origin. Pneumatic hammer comprises network camera, handle, hollow cylinder, striker arranged in it with central channel, which separates cavity of specified cylinder into chambers of idle stroke and working stroke, tube pulled through central channel of striker and connecting network camera with idle stroke chamber, and working tool with tail. At cylinder end on the side of working stroke chamber there is fixed cover installed with central through opening for tube insertion through it. Side surfaces of tube and central through hole in cover produce throttling channel, which connects network camera with chamber of working stroke. Chamber of working stroke communicates by means of relief channel to accumulation chamber. Radial outlet channel is arranged in cylinder side wall. In central tube, coaxially to it, there is additional tube installed with annular gap. Additional tube is made of elastic material with closed end on the side of idle stroke chamber and is fixed by fastening elements relative to central tube with provision of network camera communication to chamber of idle stroke by means of annular gap.

EFFECT: invention provides for reduction of inefficient air flow.

2 cl, 2 dwg

Acerate gun // 2370358

FIELD: mechanics.

SUBSTANCE: invention relates to impact device and may be used to clean surfaces, namely to remove remains of old paint and rust film. The device is comprised of a cylindrical body, where movable cylinder is installed between two compression springs so that it can slide. The flying piston displaces in the cylinder in a reciprocal manner and under compressed air action and transfers impact pulse to anvil. The pin carrier rests upon the said anvil under the pressure of one spring. Besides a multiple set of pins is available in pin carrier so that they can slide in axial direction and adjoin the said anvil by their end heads under operating pressure. The pin carrier contains cup with guiding plate which is made up from at least two layers of material having different rate of hardness or resistance to wear. The layers are placed perpendicularly to pin displacement direction, while guiding plate material layer, which is the nearest layer to the anvil, is made up from hard or more wear-resistant material as compared to the next layer coming in axial direction of pins.

EFFECT: extended lifetime of device.

11 cl, 5 dwg

FIELD: machine engineering, namely manual percussion action machines such as electric hammers and perforators used in building, mining, machine engineering and other industry branches for making openings in building materials and rocks and also for breaking them.

SUBSTANCE: in percussion apparatus when guiding cylinder providing percussion action is arranged in limit axial position, opening is arranged outside zone 2R of working stroke of piston and outside zone H of air cushion, higher than working end of piston being in upper dead point. At idle stroke of percussion machine when guiding cylinder is in other limit axial position, striker is hold in front position due arrangement of opening in zone 2R of working stroke of piston directly near its working end when piston is in upper dead point. It provides short-time communication of air cushion with atmosphere.

EFFECT: enhanced reliability of idle stroke mode of percussion action machine.

2 dwg

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