The method of repair of pressure relief valves tractor hydraulic distributors
(57) Abstract:Usage: repair production, restoration of the bypass valve and increase their post-repair resource. The inventive valve seat rastaivaya without removing internal hole on the greater repair, cylinder valve, the tapered bolt is cut to education cylindrical surface on which zapressovyvajut sleeve with a radial drain channels. The sleeve is polished under the hole of the valve seat providing minimum clearance for connection and fixed to the valve by means of radially arranged pin and piston portion of the valve grind under repair size, and the orifice install the cover. 4 Il. The invention relates to the repair of production and can be used for recovery relief valves and enhance their post-repair resource.The known method of repair-pass valve comprising processing conical surface at an angle of 45aboutcutter on a lathe and grinding at the same angle, the expansion piston part staliunas or plating, followed slim method provided by the recovery of the by-pass valve with a relatively small wear cone-pass valve. In practice, however, found that at least half of the valves are conical part of a significant deterioration of the above-mentioned method cannot be localized and there is a need welding cone and machining after welding. These operations are time consuming and in most cases are not met, the valve is simply written off the scrap heap and replaced by a spare new one.Restoring piston part connected with staliunas or chrome also has considerable complexity.Low technical level repair production can not withstand the technical requirements on the repaired valve (for example, the alignment cone and piston parts), which leads to the decrease of the technical characteristics of the dispenser, namely, to reduce the volumetric efficiency of the distributor (increased leakage through the valve when it is closed), and hence the performance of the tractor unit. In terms of repair and production operations plating and cladding have certain difficulties in the application of these methods and disposal of waste and related environmental phenomena of nature. Processing normirovannih paratene is to provide a method of repair of pressure relief valves tractor valves, you can reduce the complexity of the repair, improve manufacturability recovery to significantly improve post-repair resource tractor hydraulic distributors.The invention differs in that the valve seat rastaivaya without removing internal hole on the greater repair, cylinder valve, the tapered bolt is cut to education cylindrical surface on which zapressovyvajut sleeve with a radial drain channels, then the sleeve is polished under the hole of the valve seat providing minimum clearance for connection and fixed to the valve by means of radially arranged pin and piston portion of the valve grind under repair size, and the orifice install the door.The use of the invention eliminates many of the technological operation to restore the bypass valve, which is required when the conventional method of repair. There is no need in the description silnosolenyh valves, since the proposed method all valves can be repaired. There is no need to ipressive saddle. Install the bushings on the modified tapered shank and fitting it under the seat diameter is not raheemah with stationary parts of the valve seats from three to two, that allows the valve to better centered. Thus, a new set of features of the proposed method allows to obtain a new technical result, which cannot be obtained by the known method. The invention can be used not only for major overhaul of valves, but when the current in the conditions of the rural Studio.The invention is illustrated by the following drawings for example tractor valve P80-3/1-222.Fig.1 is a schematic illustration of the geometric shape of the valve repair; Fig. 2 is a schematic illustration of the geometric shape of the valve after repair; Fig. 3 is a schematic illustration of the geometric shape of the sleeve with a radial channels; Fig.4 is a schematic representation of the relief valve Assembly after repair.The proposed method is implemented as follows.In case 1 (Fig.4) of the valve handle, for example, the saddle 2 hole 3 more repair size (for example 20 mm). Head 4 by-pass valve 5 (see Fig.1) cut off the shank 6 to the formation of the cylindrical surface 7 (see Fig.2), which is zapressovyvajut sleeve 8 (see Fig.3) with radial drain channels 9. The property is by a pin 11 fixed to the sleeve 8 on the valve 5, when the pin 11 serves to stop movement of the bypass valve 5 down to close the radial drain channels 9 body seat 2. Piston part 12 by-pass valve 5 grinding diameter underestimate 0.05...0.1 mm and the orifice 13 choke rivet 14 (see Fig.4). The METHOD of repair of pressure RELIEF VALVES TRACTOR hydraulic distributors, including machining the valve seat, the valve head with the tapered bolt and piston parts, characterized in that the valve seat stretch without removing internal hole on the greater repair, cylinder valve, the tapered bolt is cut to education cylindrical facets which zapressovyvajut sleeve with a radial drain channels, then the sleeve is polished under the hole of the valve seat providing minimum clearance for connection and fixed to the valve by means of radially arranged pin and piston portion of the valve grind under repair size, and the orifice install the cover.
FIELD: repairing equipment of shops, namely of locomotive depots of railway road transport vehicles.
SUBSTANCE: movable installation includes lifting table having lower wheeled platform and jointly mounted on it upper stand; mechanism for lifting and descending said stand; power hydraulic cylinder mounted on upper stand and communicated by means of hydraulic lines through control unit with high-pressure pump system; clamping device for mounting-dismounting bearing assemblies. High pressure pump system includes tank, pump aggregate, draining pipeline, suction pipeline connecting inlet of pump aggregate with tank. Lifting and descending mechanism is in the form of hydraulic cylinder and it is mounted on lower platform. Pump aggregate is arranged on upper lid of tank and it is in the form of displacement hydraulic pump with electric motor. Filter is mounted in suction pipeline. Control unit is in the form of body having two built-in safety valves, tap distributor and built-in non-return valve. Manometer and additional filter connected with draining pipeline and having pouring hole are connected with control unit. Hydraulic lines are in the form of flexible hoses. Installation is provided with additional power hydraulic cylinder that forms together with connected in parallel main hydraulic cylinder unit of power hydraulic cylinders. Said unit of power hydraulic cylinders is placed on supporting sheet-plate mounted on upper stand with possibility of rotation or removal from upper stand and with possibility of moving in range of length of flexible hoses. Similar cavities of hydraulic cylinders are mutually communicated. Clamping device includes movable and stationary plates mounted respectively on rods and back lids of hydraulic cylinders and designed for joining tie rods of attachment.
EFFECT: enhanced reliability, no-failure operation of installation.
FIELD: assembling of precise units of instruments by pressing-in with use of calibrated effort, by riveting and expanding with use of precession tool.
SUBSTANCE: press includes П-shaped housing; adjustable table mounted in struts of housing and fixed to said struts by means of pins; power hydraulic cylinder with axial motion of rod; rotation drive of precession head; pumping station of hydraulic drive unit. Rotation drive of precession head includes electric motor and belt transmission. Power hydraulic cylinder is rigidly mounted on cross piece of housing and it carries plate on end of spring-loaded rod. Said plate supports two plungers spaced in parallel relative to axis of rod and spring-loaded relative to housing. Pulleys of belt transmission of rotation drive are mounted in casing. The last is secured to plate in such a way that driven pulley is mounted on spindle coaxially relative to rod of hydraulic cylinder and driving pulley is mounted on the same axis as shaft of electric motor placed in cross piece of housing. Driving pulley and shaft of electric motor are kinematically joined by means of other shaft whose one end is mounted in shaft of electric motor and whose other end is joined by means of sliding dowel with opening of supporting axle of driving pulley. Spindle of driven pulley is joined with precession head.
EFFECT: improved design providing enhanced rigidity and working accuracy of press.
FIELD: mechanical assembling procedures, namely equipment for assembling aggregates of caterpillar transport vehicles, for example semiautomatic machines for assembling caterpillar tracks.
SUBSTANCE: in apparatus for assembling chain stop plate is mounted in such a way that its working surface is arranged in plane normal relative to pressing in plane. Upper non-working portion of stop plate at side of ending pressing-in cycle is inclined in horizontal plane to side from rotor type conveyer. Lower non-working portion of plate in vertical plane is inclined relative to vertical line to side from rotor type conveyer. Stop part of pusher exceeds diameter of head of pin. Rigid guides are arranged in plane parallel to pressing-in plane; said guides are in the form of roller tables with pitch between rollers of roller table less than pitch of chain links. Guides embrace upper branch of conveyer from downwards and branch of chain from upwards at least along the whole length of it. Drive unit is provided in addition with back-stroke mechanism. Splitter is in the form of plate that is jointly mounted in its mean portion along lateral sides on supporting surface in horizontal plane along motion direction of conveyer for moving pins and it forms two-arm lever. One end of said lever is spring-loaded from downwards with possibility of engaging with dents of conveyer for moving pins. Other end of said lever is Г-shaped one and it may engage by free end with pins on inclined trough. Horizontal axes of articulation joints in vertical plane are provided with holding levers rigidly joined with plate and mounted with possibility of engaging with pins on inclined trough.
EFFECT: enlarged manufacturing possibilities, enhanced operational reliability.
FIELD: mechanical engineering.
SUBSTANCE: mandrel has guide, working part made of deformable teeth, calibration parts, and diverging groove made in the guide and working parts. The expanded end of the groove is in coincident with the origin of the guiding part. The groove that ends at the last deformable tooth of the working part has radius-shaped cross-section.
EFFECT: enhanced quality of the press joint and expanded functional capability.
FIELD: machine engineering, namely equipment for dismounting press-fit joints, possibly restoration of electric machines.
SUBSTANCE: apparatus includes housing with platforms for horizontal and vertical motions. Part to be dismounted is placed on horizontal motion platform and it is fed to stripping mechanism. The last is joined with vertical motion platform by means of fastening members and it is provided with adjusted grips supporting heating members with possibility of their axial movement. Heating members are in the form of nozzles for alternating feed of hot and cooled air.
EFFECT: reduced axial errors between dismounted part and stripping mechanism, lowered efforts for stripping parts.
5 cl, 5 dwg
FIELD: mechanical engineering.
SUBSTANCE: device comprises the mechanism for locking pressed parts made of an extensible sleeve. The first power hydraulic cylinder is used for moving parts and can rotate between two vertical unmovable pillars. The pillars are pivotally connected in pair with movable vertical pillars through the top and bottom horizontal clamps. The extensible spring-loaded stop with the drive and the first hydraulic cylinder are axially aligned. The first power hydraulic cylinder receives the second power hydraulic cylinder whose rod is provided with first center and spring. One end of the spring co-operates with the piston, and other end of the spring co-operates with the face of the extensible sleeve. The extensible stop receives the second center with the stack of plate springs that is coaxial to the first center. The bottom clams are provided with a lifting-rotating device.
EFFECT: reduced labor consumption for making and simplified structure.
1 cl, 2 dwg
FIELD: devices designed for simplifying procedures of assembling/disassembling units.
SUBSTANCE: crank stripper includes cross piece 1 supporting power mechanism in the form of one-way telescopic hydraulic cylinder 2 having thrust rod 3 for shaft of crank 14; mechanism for forced closing of foots having cylindrical discs 8, 9, paired plates 10 and double-arm levers 4,5. One arm is used for engaging with crank; other arm of is cone one and it may rest upon lateral surface of cylindrical disc secured to lateral side of cross piece. Double-arm lever whose arms are mutually inclined by obtuse angle is jointly mounted through paired plates in center of disc. Articulation joint of lever is mounted in edge portion of second lever arm on line of inner surface of first lever arm.
EFFECT: intensified clamping of part by foots, enhanced efficiency, lowered cost price of working operations.
FIELD: mechanical engineering.
SUBSTANCE: method comprises gripping the part to be dismounted and applying axial load by means of at least two ties and, e.g., hydraulic cylinder. The rod of the hydraulic cylinder cooperates with the face of the shaft. The ties are interconnected via a plate opposite to the end of the part to be dismounted. Each of the ties is provided with the eccentric groove. The ties are set in the openings in the part to be dismounted for permitting engagement by their step defined by the eccentric groove. Between the wall of the opening of the part to be dismounted and each tie is sickle-shaped bushing member. The hydraulic cylinder abuts against the plate so that to provide relationships D1 ≤ D2, b ≥ H, e = h, where D1 is the outer diameter of the tie, D2 is the diameter of the opening in the part to be dismounted, b is the width of the eccentric groove, H is the thickness of the part, e is the eccentricity of the groove with respect to the axis of the tie, and h is the maximum thickness of the sickle-shaped bushing member.
EFFECT: expanded functional capabilities.
1 cl, 2 dwg
FIELD: machine engineering, namely mechanical strippers.
SUBSTANCE: stripper includes traverse bar with grips, screw having two outer threads with different pitches; main detachable sleeve mounted by thread whose pitch is less than that of said screw; additional threaded sleeve mounted by second thread of said screw; holder embracing both sleeves, fixed relative to them in angular direction and resting by its inner shoulder upon end of main sleeve. Inner shoulder is formed on one end of holder; other open end of holder is arranged in through opening of traverse bar and it is rigidly joined with said bar. Threads of powerful screw have similar sign; additional sleeve has outer flange spaced from open end of holder by interval determined according to relation K = B1(H2/H1 - 1), where K - interval between outer flange of additional sleeve and open end of holder; B1 - displacement (caused by main sleeve) of part stripped by means of stripper; H2 - thread pitch of additional sleeve; H1 - thread pitch of main sleeve. Sleeves are mutually spaced by interval T exceeding value of mutual convergence of sleeves.
EFFECT: simplified usage of stripper.
FIELD: railway road machine engineering, possibly repairing of railroad machines.
SUBSTANCE: press includes frame having base and two struts mutually joined by means of two columns; working cylinder mounted on one of said struts; force and supporting traverse bars with rollers. Said traverse bars are arranged between struts of press frame and they are mounted with possibility motion on rollers along columns of power frame. Force traverse bar is mounted with possibility of fixing it to columns.
EFFECT: enlarged manufacturing possibilities, improved quality of combining wheel pairs, simplified design of press.