Hydraulic drive of pneumatic wheeled excavator
FIELD: machine engineering.
SUBSTANCE: in the known hydraulic drive of the pneumatic wheeled excavator, an additional circuit is included in the servo control system consisting of two pedal control units and enabling execution by each of them, at least two functions of hydro-valve EITHER with two inputs and one output branch and two electro-hydraulic distributors with two outputs and one input branch each. The first pedal control unit is connected to the first input branch of hydraulic valve OR the second pedal control unit is connected to the second input branch of the OR hydraulic valve, the stroke hydraulic motor and the switching distributor, the output branch of the OR hydraulic valve is connected to the input taps of both electro-hydraulic distributors, the output taps of the first electro-hydraulic distributor are connected to the address spool of the stroke, the output taps of the second electro-hydraulic distributor are connected to the address spool of blade supports.
EFFECT: reduced fatigue, increased comfort and safety for the operator, increased the functionality of the excavator.
SUBSTANCE: invention relates to excavator drive with set of separate drives such as rotation gear drive, lifting gear drive, bucket drive and handle drive, where for rotary gear drive two reverse adjustable devices are provided which devices are connected with at least one energy accumulator. Invention task consists in excavator drive improvement so that as large as possible portion of driving energy could be recovered and put at disposal for other drive motions. The excavator drive consists of a number of separate drives such as rotation gear drive, lifting gear drive, bucket drive and handle drive, lifting gear drive, bucket drive and handle drive. In this structure, two reverse adjustable devices are provided for as rotation gear drive which devices are connected with at least one energy accumulator. One of reverse adjustable devices is made capable to be connected with excavator driving gear. In this structure, reverse adjustable devices represent hydraulic adjustable devices, and adjustable devices of rotary gear drive are energetically connected with adjustable devices of lifting gear drive.
EFFECT: perfected design.
11 cl, 3 dwg
SUBSTANCE: invention relates to construction, namely to the operating construction machine for excavation. Machine comprises carrier vehicle, mast and cable winch mounted on the carrier vehicle, which comprises a frame of winch and rope drum mounted therein with possibility of rotation around the rotation axis. Cable winch is mounted on the carrier vehicle with the possibility of rotation around the first pivot axis with the first hinge pin. The following is provided: at least one rotating cylinder by means of which the cable winch can be rotated around the first rotation axis, the first pivot pin produced with the possibility of disconnection to release the first pivot axis and at least one second pivot pin, mounted on the cable winch to form the second pivot axis, spaced from the first pivot axis. Cable winch is designed with the possibility of rotation by means of the rotating cylinder around the second pivot axis, extending transversely to the rotation axis of the cable winch.
EFFECT: hinged rotation of the cable winch around two specified different pivot axes is provided.
10 cl, 8 dwg
SUBSTANCE: machine comprises self-propelled chassis with full-revolving platform mounted on it, on which the operator's cab, engine, hydraulics, manipulator and the device for compensation of the overturning moment are mounted. The device for compensation of the overturning moment is made in the form of movable bracket of the manipulator fastener to the full-revolving platform. The bracket base with one its end is hingedly connected on the full-revolving platform. To the other end of the bracket base the pitch drive of the movable bracket in the form of a hydraulic cylinder is hingedly connected. The other end of the pitch drive of the movable bracket is hingedly mounted on the full-revolving platform. Above the fastener hinge of the movable bracket the manipulator is hingedly connected to the full-revolving platform. Lifting and lowering drive of the manipulator in the form of a hydraulic cylinder is hingedly connected with one its end to the manipulator, and with its other end it is hingedly connected to the full-revolving platform or the movable bracket.
EFFECT: expanding area of trees processing, eliminating of need in balance weight.
2 cl, 3 dwg
SUBSTANCE: machine comprises self-propelled chassis on which the rotary platform is mounted by means of the rotary rolling bearing, having the mechanism of its rotation, operator's cab, engine installation, compartment with hydraulics, tanks for fuel and power fluid for the hydraulic system, hydraulic manipulator with a working element, and a counterweight. The counterweight is mounted with the ability of its movement relative to the rotary platform depending on the hydraulic manipulator sweep. The counterweight in the form of the compartment with hydraulics, tanks for fuel and power fluid for the hydraulic system, as well as the engine installation is mounted on a secondary platform with the ability to rotate around a horizontal axis in the vertical longitudinal plane of the machine by double-arm lever. The double-arm lever with its one arm is connected to the secondary platform, and with the other - to the hydraulic manipulator. The axes of rotation of the secondary platform and double-arm lever are mounted on the rotary platform.
EFFECT: invention enables to reduce the size and weight of the machine.
2 cl, 3 dwg
SUBSTANCE: machine comprises self-propelled chassis, on which by means of rotary roller bearing the rotating platform is mounted with the mechanism of its turn, operator's cab, power installation, a compartment with hydraulics, tanks for fuel and power fluid for the hydraulic system, hydraulic manipulator with a working body, and a counterweight mounted with the ability to move it relative to the rotating platform depending on the hydraulic manipulator swing. The counterweight is made in the form of a compartment with hydraulics, tanks for fuel and power fluid for the hydraulic system and the power installation mounted on a secondary platform with its ability to rotate around a horizontal axis in the vertical longitudinal plane of the machine by double-arm lever. The double-arm lever with its one arm is connected to the secondary platform, and with the other - to the hydraulic manipulator. The axes of rotation of the secondary platform and the double-arm lever are mounted on the rotating platform.
EFFECT: implementation enables to reduce the size and weight of the machine.
3 cl, 4 dwg
FIELD: machine building.
SUBSTANCE: central collector of excavator consists of stationary and movable parts. The movable part has the central air channel wherein there is installed an internal pipeline, on one end of which there is mounted a double-channel air splitter, while another one is equipped with an additional air collector made in form of two elements interconnected and performing full-circle rotation one relative to another. The first element is secured on the movable part and has axial and lengthwise channels, while the other one is attached to the stationary part and has two outlet channels. Also, one of the channels of two-channel air splitter is connected with the central air channel, while the other one is connected with the internal pipeline. The axial channel of the first element is connected with the internal pipeline and with one of the outlet channels of the second element; the lengthwise channel is connected with the central air channel and another outlet channel of the second element.
EFFECT: expanded functionality of pneumatic system.
2 cl, 1 dwg
SUBSTANCE: machine comprises a motor vehicle chassis with a full-circle platform installed on it. The following components are mounted on the platform - an operator's cabin, an engine, hydraulic system sets, a manipulator, a balancing weight and a mechanism of balancing weight movement relative to the full-circle platform. The balancing weight in the form of an engine and hydraulic system sets on the auxiliary platform with the possibility of its movement in the horizontal plane along longitudinal guides. Longitudinal guides are rigidly fixed on the full-circle platform. The mechanism of balancing weight movement is made of a yoke, which is hingedly installed on the bracket, which is rigidly fixed on the full-circle platform. The yoke with its front arm is hingedly via a traction rod is connected to a manipulator, and with its back arm is hingedly via a traction rod connected to the balancing weight.
EFFECT: reduced weight of the machine, increased stability during process operations, and as a result, higher reliability in operation.
2 cl, 2 dwg
SUBSTANCE: invention is related to machine building support of mining industry, namely as combination of processes in servicing of excavators and roller-bit drilling machines designed for production of minerals by open-cut method. Method for lifting of heavy quarry equipment modules, in which lifting force is developed by power hydraulic cylinders, at the same time energy of high pressure working fluid is used, during the whole process of lifting, possibility is provided for automatic blocking of hydraulic system elements failures. Besides power hydraulic cylinders are equipped with parallel-acting screw jacks, the latter are used, at the moments of modules lifting, to set possibility of synchronous motion with power hydraulic cylinders without formation of lifting force, and at the moments of lifted modules slanting, to provide for the possibility of its leveling.
EFFECT: broader field of application, increased reliability, making process of modules lifting independent.
FIELD: mechanical engineering.
SUBSTANCE: invention relates to machinery field, provided for implementation of digging and loading operations, particularly to machinery of type of frontal bucket loader. Load-carrying system is formed by front half-frame, hinged to back half-frame, consisting two longerons with bearing of beam, counterbalance, accumulator boxes. On back ends of longerons it is rigidly fixed transverse beam with guidlines, on which there are mounted counterbalance and back lamellar element, fixation of which to transverse beam is implemented by means of releasable connection. Counterbalance is implemented as changeable and composite with "П"-shaped openings and mass, providing stability of motion and manageability of loader with cargo, and accumulator boxes are implemented as demountable and fixed to back lamellar element and longerons. Accumulator boxes allow openings for installation of clearance lamps and backup lamps.
EFFECT: invention provides for stability increasing of frontal bucket loader at changing of vehicle capacity of frontal bucket loader ensured by variation of counterbalance mass, and also simplification of erection and dismantling, increasing of maintainability and serviceability.
FIELD: mechanical engineering, particularly component parts of dredgers or soil-shifting machines with pneumatic wheels and hydraulic drives.
SUBSTANCE: soil-shifting machine comprises carriage, rotary platform with power unit, working equipment, hydraulic drive with controllable power pumps, as well as with hydraulic control means and hydraulic distribution means associated with working equipment. The soil-shifting machine also has power hydraulic lines and servo-control lines, as well as welding and pumping assemblies. Each pumping assembly comprises generator and self-priming pump with drives. Power take-off contour and control means are included in hydraulic drive. The power take-off contour comprises drive hydromotors for above generator and self-priming pump, two power distribution means. Each power distribution means is made as two-position dual-line slide and has hydraulic servo-control means. The control means comprises double-slide control unit with outlet channels, OR element and servo-control lines. The first hydraulic line of the first power distribution means is connected with pressure hydraulic line of one controllable power pumps. The second hydraulic line is linked to hydromotor of generator drive or self-priming pump through the second power distribution means. In the first position of the first power distribution means pressure hydraulic line of power pump is connected with hydraulic distribution means of working equipment. In the second position the pressure hydraulic line of power pump is linked to the second power distribution means, which in the first position is connected with generator drive hydromotor and in the second position is linked to self-priming pump drive hydromotor. Both hydraulic lines of outlet channels formed in double-slide control unit are attached to servo-control line of the first power distribution line and one to another by OR element. Besides, one hydraulic line of outlet channel is connected with servo-control line of the second power distribution means. Hydraulic line located between OR element and the first power distribution means is connected with servo-control line of controllable power pump.
EFFECT: extended functional capabilities, possibility to use the machine for sanitary service line repair.
FIELD: machine building.
SUBSTANCE: invention relates to the boom machines, namely to the single-bucket excavator and front loaders of cyclic operation. The energy-saving device of the boom machine is suggested: energy-saving cylinder, gas bottle, hydraulic distributor, stock cavity of the energy-saving cylinder. At that, the piston cavity of the compensating hydraulic cylinder is connected directly through the hole in the casing wall with the casing of the gas bottle, and stock cavity of the energy-saving cylinder is connected through the hydraulic distributor with the drain main. At that, the total volume of the gas cavity of the energy-saving cylinder and gas bottle exceeds two volume of the work stroke of the energy-saving cylinder.
EFFECT: simple design, exclusion of energy losses during rising of the gravity forces of the work equipment, reduction of the energy and fuel consumption by the internal combustion engine.
FIELD: machine building.
SUBSTANCE: operation of reduction of forces of gravity of working equipment with the rod of equalising cylinder is performed, the reduced force at the rod by gas pressure in the piston cavity is counterbalanced, and operation of stabilising of compressed gas pressure is performed. Meanwhile also the piston compressed gas cavity is sealed from atmosphere by means of connecting of variable volume of the rod hollow filled with greasing fluid, with the body of the deformed low pressure pneumocamera. The operation of pressure stabilising in the gas cavity is performed at the expense of increase of volume of high-pressure gas cavity. The device for counterbalancing of forces of gravity of working equipment of jib machines is offered which includes the equalising barrel and gas bottle. Meanwhile the equalising cylinder with a rod and piston are located inside the gas bottle body charged by compressed air. And the rod hollow of equalising cylinder is filled with lubricant fluid and is connected to the body, where the low pressure pneumocamera is installed. Meanwhile the piston and rod of equalising cylinder are made hollow.
EFFECT: lowering of load on the main hydraulic cylinders of the jib and on the engine shaft, and fuel consumption.
2 cl, 4 dwg
FIELD: machine building.
SUBSTANCE: invention refers to hydraulic control units for agricultural or building machines. A valve cluster to control at least one consumer is proposed, the consumer comprises two connections (A, B) to the consumer sides, connection (P) to a pump and connection (T) to a tank as well as four slide control valves (C1-C4) which are hydraulically controlled by relevant control connection (c1-c4). The first slide control valve (C1) couples the connection (P) to the pump and the first connection (A) to the consumer side, the second slide control valve (C2) couples the connection (P) to the pump and the second connection (B) to the consumer side, the third slide control valve (C3) couples the first connection (A) to the consumer side and the connection (T) to the tank and the fourth slide control valve (C4) couples the second connection (B) to the consumer side and the connection (T) to the tank. Additionally two servovalves (Y1, Y2) are provided to control the control connections (c1-c4) respectively of each pair of slide control valves (C1-C4).
EFFECT: reduced inner pressure losses and higher efficiency of consumer operation.
15 cl, 4 dwg
FIELD: physics; control.
SUBSTANCE: disclosed group of inventions relates to a hydraulic control system for working machines. The hydraulic control system has a pump, a tool actuator, a tool control valve configured to control the flow of pressurised fluid fed to the tool actuator, and a controller. The controller includes a feed-forward control map which responds to the intended change in the required flow rate with the possibility of relating the tool movement request to the change in discharge flow rate of the pump, and operably connected to the tool control valve and the pump. The controller can further be configured to receive a tool movement request. The controller can further be configured to estimate changes in the required flow rate of the tool control valve associated with the tool movement request. The controller can also be configured to generate instructions for adjusting the discharge flow rate of the pump based on the intended change in the required flow rate to execute the tool movement request. Also disclosed are a method of controlling tool movement and a machine having said hydraulic system.
EFFECT: providing feed-forward control to change supply of a liquid before the need thereof arises.
19 cl, 3 dwg
FIELD: machine building.
SUBSTANCE: invention relates to operation of working machine hydraulic system. Proposed method comprises the steps that follow. Equipment configuration is retained at definite orientation to measure first pressure in hydraulic drive chamber (56, 58) connected with equipment at preset position. First signal is compared with first pressure magnitude. First functional relationship (71) is selected from multiple memorised functional relationship if said first signal is higher than first pressure magnitude. Second functional relationship is selected from multiple memorised functional relationships if said first signal is lower than first pressure magnitude. Hydraulic drive is controlled on the basis of selected functional relationship. Note here that each of multiple memorised functional relationships is associated with different category of equipment configuration.
EFFECT: possibility to modify relationship between hydraulic drive speed.
9 cl, 3 dwg
FIELD: machine building.
SUBSTANCE: invention refers to machine-building hydraulics, and namely to hydraulic actuators of mobile machines and hydraulic plants of cyclic action with several actuating mechanisms. The invention proposes a channel of multiflow hydraulic actuator, which is intended for supply of a working liquid flow to pressure cavities and consists of several in-series connected double flow cavities having the possibility of disconnecting their inlets and outlets. Besides, on the flow inlet side, each double flow cavity is connected to the corresponding pressure cavity. Besides, in ties between pressure and overflow cavities there additionally installed are check valves directed with their outlets to pressure cavities. And outlets of double flow cavities are connected through inlets of check valves to the corresponding pressure cavities. Besides, the outlet of the last double flow cavity serves as an inlet for the other flow.
EFFECT: proposed invention allows supplying two independent flows via one hydraulic channel with several pressure cavities, as well as simplifying a hydraulic actuator and reducing dimensions of hydraulic equipment.
2 cl, 8 dwg
SUBSTANCE: ripper contains bidirectional liquid energy accumulator, underlying machine, framed suspension with hinged ripper tip mounted on it and elastic system. At that elastic system contains the main cylinder with piston at the rod mounted on the frame and power-operated rod passing through articulated rod and ripper tip. At that the main cylinder is divided by partition into two independent cylinders equipped with main and auxiliary cavity. In auxiliary cavities of cylinders there are installed pistons connected to hollow rods which interact with power-operated rods passing through the main cavities and fixed at inners walls of travelling barrel covering the main cylinder which is connected to ripping rack through a hinge. Auxiliary cavities of each cylinder are equipped with openings from rod side and free piston side, which interact with reversive hydro pump through bidirectional hydraulic locks and pipelines. Besides elastic system is equipped with auxiliary reversive hydro pump which outlet is connected though bidirectional hydraulic locks to openings in walls of the main cylinder cavities while its inlet is connected to pipeline with a tank for liquid storage.
EFFECT: increasing efficiency of soil ripping due to reduction of pulling force and dynamic loads acting on underlying machine and their transfer to the area of soil destruction within the wide range for forced oscillation frequencies of actuating device.
FIELD: engines and pumps.
SUBSTANCE: proposed device comprises control means and detection means. Control means serve to control engine output power for driving the machine. Detection means allow identification of reverse conditions, motion speed and preset gear ratio. In reverse, control means vary output power by control over engine shaft rpm.
EFFECT: fuel savings.
3 cl, 7 dwg
SUBSTANCE: loader boom hydraulic cylinder is proposed, comprising a body, lower and upper covers of the hydraulic cylinder, a braking device and a check valve. At the same time the check valve is made in the form of a cylindrical cap with a spring inside and an inlet nozzle installed in a separate body fixed on the hydraulic cylinder body. Besides, the specified valve communicates with the piston cavity of the hydraulic cylinder by means of an additional hole made in the hydraulic cylinder body.
EFFECT: elimination of piston strikes against a hydraulic cylinder cover as a loader boom is installed in a position of excavating start at the level of the support surface.
SUBSTANCE: collector of bulldozer equipment of an earth mover is proposed, which comprises a body with radial holes for supply and discharge of working fluid, connected as capable of rotation and axial displacement with a blade frame. Inside the body there is a part of a fixed core, installed with a gap into eyes of the blade frame and stopped by the other part against rotation in a lever of a blade lifting mechanism. Besides, the body is equipped with a leash element with a through slot. The fixed core is made with circular grooves for installation of seals and circular bores, communicated with radial holes of the body and channels of supply and discharge of working fluid in the lever of the blade lifting mechanism and axial channels for transfer of working fluid from the lever of the blade lifting mechanism to the blade frame. At the same time the specified axial channels are closed with plugs with seals at the end side of the core and are pressed with a flange on bolts. Connection of the body with the blade frame is carried out by means of a threaded element screwed into the blade frame and stretching via the central axial hole installed into a cut slot of the leash element, a stop made in the form of a four-face rod with a base in the form of a square, with a support site perpendicular to its faces. Between the leash element and the stop in the radial direction there is a gap, the value of which is more than the total value of gaps between the outer surface of the core and inner surfaces of the blade frame eyes. Height from the surface joined with the blade frame to the support site of the stop is more than the thickness of the leash element, and the width of the stop is less than the width of the slot of the leash element.
EFFECT: increased operational resource of a collector due to elimination of direct transfer of loads from a movable part of a machine towards a fixed one.
FIELD: earth-moving facilities; hydraulic drives of scraper working members.
SUBSTANCE: proposed hydraulic drive contains pressure spool installed in parallel with like spaces of two hydraulic cylinders, pressure main line connected between two check valves, free outlet of check valve being connected with inlet of pressure spool and one hydraulic cylinder. Free inlet is connected with outlet of pressure spool and other hydraulic cylinder, drum main line connects opposite spaces of hydraulic cylinders. Hydraulic drive is furnished with two series-connected pressure spools. Inlet of first pressure spool and outlet of second pressure spool are connected with outlet of first hydraulically controlled reversible spool. Their common line is connected with controllable space of second hydraulic cylinder and is separated by check valve from pressure main line. Inlets of first hydraulically controlled reversible spool are connected to outputs of second hydraulically controlled reversible spool and are connected with controllable spaces of first and second hydraulic cylinders. One inlet of second hydraulically controlled reversible spool is connected with inlet of pressure spool and is connected to pressure line through check valve, and second inlet is separated from pressure line by other check valve. Control spaces of two hydraulically controlled reversible spools are united and are connected to pressure main line through two-position spool.
EFFECT: improved efficiency of control of scraper blade system.