Energy-saving working equipment of excavator
SUBSTANCE: device comprises a boom, a bucket, the main hydraulic cylinder of the boom, a balancing pneumatic hydraulic cylinder, a gas balloon. The main hydraulic cylinder of the boom and the balancing pneumatic hydraulic cylinder are located in a single longitudinal vertical plane of the boom symmetry, so that the balancing pneumatic hydraulic cylinder is brought to the boom as close as possible in the lower and upper limit positions of the working equipment. The boom base is arranged in the form of a box, where the balancing pneumatic hydraulic cylinder is installed, a piston cavity of which is connected to a gas balloon charged with pressure of more than 10 MPa. At the same time the volume of the gas balloon makes more than five working volumes of the balancing pneumatic hydraulic cylinder.
EFFECT: energy-saving and simplification of design.
The invention relates to construction machinery, namely the hydraulic shovel excavators.
Known energy-saving production equipment excavator [AC No. 1631137, BI No. 8, 28.02.1991,]containing the boom, arm, bucket, main boom cylinder, an additional regenerative hydraulic, hydropneumatic accumulator, valves, hydraulic valve.
The disadvantages of the device are the power imbalance of the main cylinder of the boom and additional regenerative hydraulic cylinder, which is installed next, symmetrically about the vertical plane of symmetry of the working equipment. Such installation of the main cylinder of the boom and additional regenerative cylinder leads to distortion of the working equipment in the transverse plane due to the different efforts in these cylinders.
Another disadvantage of the design is the design complexity due to the use of the device pneumohydroaccumulators and a complex system of hydraulic valve.
The closest in technical essence of the known technical solutions of the present invention is a power-saving operating equipment excavator [Patent No. 2190062, BI No. 27, 27.09.2002,]containing the boom, arm, bucket, main cylinder balancing cylinder,gas cylinder, the hydropneumatic accumulator.
The disadvantage of this device is the presence of a hydropneumatic accumulator, which is complex, expensive device and the complicated construction of a drive system of work equipment.
The objective of the invention is the creation of a rational layout of the main cylinder of the boom and balancing pneumohydraulic, providing energy savings and simplification of the structure.
The invention consists in balancing the forces of gravity working equipment balanced pneumomediastinum, piston chamber which is connected to the gas bottle, charged with nitrogen to a pressure of more than 10 MPa, and in the establishment of a rational scheme of installation of the main cylinder of the boom and balancing pneumohydraulic, the volume of gas equals more than five working volume balancing pneumohydraulic.
The task of the invention is solved due to the fact that in the known device, comprising a boom, a bucket, a main hydraulic cylinder shafts, balancing pneumohydraulic, gas cylinder, according to the invention the main boom cylinder and balancing pneumohydraulic are in a longitudinal vertical plane of symmetry of the arrows, so that an equilibrium pneumohydraulic Mack the distribution panel is minimal close to the arrow in the lower and upper limit positions of the working equipment, while the base of the boom is made in the form of a box, in which is mounted a balancing pneumohydraulic, piston chamber which is connected to the gas cylinder, the charged pressure of more than 10 MPa, the volume of gas is equal to more than five working volume balancing pneumohydraulic.
The proposed invention provides an energy-saving at work by balancing the forces of gravity of the boom, stick, bucket and has a compact design.
Figure 1 shows the energy saving of the working equipment of wheeled excavator, figure 2 tracked excavator.
The invention provides an arrow 1, bucket 2, the main hydraulic cylinder 3 arrows, balancing pneumohydraulic 4, piston chamber which are connected by hydroline with a gas cylinder 5. The base of the boom 1 is made in the form of a box, in which is mounted a balancing pneumohydraulic.
Energy-saving production equipment is characterized by the following parameters. The volume of the gas cylinder is more than five working volume balancing pneumohydraulic, i.e. chosen so that when lifting and lowering the boom pressure in a gas cylinder remained almost constant. In the balancing forces of gravity of the boom, stick, bucket eliminating their harmful effects on the binding energy is emkosti workflow.
When the extension rod of the main cylinder 3 is the rise of working equipment with bucket 2. At the same time balancing pneumohydraulic 4, piston chamber which is connected to the gas cylinder 5, provides the balancing force of gravity of all items of work equipment.
Therefore, when raising the boom 1 and bucket 2 with a useful load of the engine power and fuel are expended only on the rise of the payload.
The proposed design of the arrows and axial location of the main cylinder of the boom and balancing pneumohydraulic provide a compact design and reliable operation.
Energy-saving production equipment shovel excavator containing the boom, the bucket, the main hydraulic cylinder shafts, balancing pneumohydraulic, gas cylinder, wherein the main boom cylinder and balancing pneumohydraulic are in the same longitudinal vertical plane of symmetry of the boom so that the balancing pneumohydraulic as close to the arrow in the lower and upper limit positions of the working equipment, the base of the boom is made in the form of a box, in which is mounted a balancing pneumohydraulic, piston chamber which is connected to the gas cylinder, the charged pressure is m ore than 10 MPa, the volume of gas is more than five working volume balancing pneumohydraulic.
SUBSTANCE: energy-saving working equipment of a single-bucket excavator on a rotary column comprises a top utility tractor, a rotary column, including a base and a head, a boom, a handle, a bucket, main hydraulic cylinders of a boom. The boom is hingedly connected to a head of a rotary column, and the main hydraulic cylinders of the boom are hingedly connected to the base of the rotary column and the boom. A balancing pneumatic hydraulic cylinder is connected to the base of the rotary column and the boom, and a piston cavity of the balancing pneumatic hydraulic cylinder is connected to a gas balloon charged with pressure of more than 10 MPa. At the same time the gas balloon volume makes more than five working volumes of the balancing pneumatic hydraulic cylinder, a hinged joint of which is arranged on the base of the rotary column with displacement relative to the boom hinged joint on the rotary column head, with the possibility to ensure compact arrangement at the upper and lower positions of the working equipment.
EFFECT: increased effectiveness and efficiency factor, improved design of the working equipment.
SUBSTANCE: hydraulic system of independent flows distribution consists of hydraulic distributors, discharge cavities of which are supplied from according discharge hydraulic lines. At least another hydraulic distributor is supplied from several discharge hydraulic lines with its discharge cavity via check valves. And at least one check valve that supplies to discharge cavity of any distributor is arranged with the possibility of its forced closure in case of necessity.
EFFECT: distribution of several independent flows by minimum number of distributors between various hydraulic engines.
FIELD: machine building.
SUBSTANCE: device comprises boom, bucket, hydraulic cylinders of boom, balancing pneumatic hydraulic cylinder, gas balloon, hydraulic pump, main and additional hydraulic distributors of boom control. Piston cavities of boom hydraulic cylinders are arranged with the possibility of connection to hydraulic pump via main hydraulic distributor or additional hydraulic distributor of differential type, providing for the possibility to connect simultaneously piston and stem cavities of boom hydraulic cylinders to hydraulic pump. At the same time piston cavity of balance pneumatic hydraulic cylinder is connected to gas balloon charged to pressure of more than 10 MPa, and ratio of squares of piston diametre and boom hydraulic cylinders stem is within the range of .
EFFECT: energy efficiency, increased capacity, higher efficiency factor of working equipment.
1 cl, 3 dwg
SUBSTANCE: working machine designed for at least two functions including attachment displacement and (or) steering. The machine includes at least two hydraulic circuits, one hydraulic circuit for each of mentioned functions. Each hydraulic circuit includes at least one hydraulic pump to control operation of corresponding attachment or steering functions; separate first electric machine with possibility to transfer driving force and connected with each of mentioned hydraulic pumps for separate power supply to the pump and power takeoff form the pump; transmission for working machine displacement by means of driving wheels. The transmission includes at least one second electric machine mechanically connected with the mentioned first electric machines to exchange power between hydraulic circuits and transmission.
EFFECT: lower fuel consumption and higher efficiency.
22 cl, 9 dwg
FIELD: machine building.
SUBSTANCE: facility consists of compressor, oil-moisture separator and receiver pneumatically and successively interconnected. An output of the receiver is coupled to inputs of adsorbers with evenly distributed heaters; while outputs of adsorbers are pneumatically connected to a consumer. Also a compressor is equipped with a suction filter containing a case with a conic bottom and an orifice in its lower part, a connecting pipe of purified air outlet, a condensate extractor positioned in the bottom orifice, a reflecting partition, and a connecting pipe of purified air inlet. The case of the filter is made in form of a two-layer jacket with an air cavity connected to adsorbers and the connecting pipe of outlet of heated generated air to atmosphere by means of the connecting pipe of inlet of heating generated air via a pipeline and a control valve. Notably, curvilinear grooves with a dovetail shape are made on internal surface of the connecting pipe of inlet of purified air; the connecting pipe of purified air inlet is made in form of a convergent nozzle. A circular groove connected with a device for impurities extraction is made at the inlet orifice of the connecting pipe for purified air inlet. The circular groove is coupled with curvilinear grooves and is equipped with a mesh.
EFFECT: raised reliability of operation of pneumatic systems of control for excavators and cranes operating with considerable amount of solid particles in process dust due to reduced amount of impurities in sucked atmospheric air coming into cavities of compressor.
SUBSTANCE: invention refers to the field of machine building, namely to wheel excavator with hydraulic system. Hydraulic system of wheel excavator comprises pumps, stroke hydraulic motors, hydraulic distributor with address travel spool, power hydraulic lines including discharge power hydraulic line and power hydraulic lines of stroke hydraulic motors, servocontrol hydraulic lines, hydraulic switch of speeds with tap to connection of the second gear, unit of address travel spool control with tap to start excavator movement "forward". Hydraulic system comprises additional power circuit connected into power hydraulic lines between stroke hydraulic motors and discharge power hydraulic line, and additional circuit of servocontrol connected into hydraulic lines of servocontrol between hydraulic switch of speeds and unit of address travel spool control. Additional power circuit includes three-position spool with normally closed inlet, two outlets and two cavities of servocontrol, two-position spool with two inlets, four outlets and cavity of servocontrol, hydraulic lines that connect outlets of three-position spool to according inlets of two-position spool, and also hydraulic lines that connect the first and second outlets of two-position spool with power hydraulic lines of stroke hydraulic motors, the third and fourth outlets of which are arranged with the possibility to connect additional hydraulic set to them, for instance hydraulic hammer. Additional circuit of servocontrol consists of three-position spool control unit, having two taps, valve OR with tap and two feeds, valve AND with tap and two feeds.
EFFECT: invention provides for displacement of excavator under severe road conditions at the second gear, and also expanded functionality.
SUBSTANCE: invention refers to the field of machine building, namely to hydraulically driven crawler shovels. Hydraulic drive of crawler shovel comprises power pumps, control pump, distributor, hydraulic motors of stroke, power hydraulic lines, hydraulic lines of servocontrol with control units, hydraulic cylinders of caterpillar belt tension. Besides between each hydraulic cylinder of caterpillar belts tension and according power hydraulic lines of stroke, there is an additional circuit included, made of two drain check valves, discharge check valve, safety valve and hydraulic lines of servocontrol, at the same time piston cavity of hydraulic cylinder of tension of caterpillar belts is connected to discharge cavity of safety valve and through discharge check valve with discharge hydraulic line of servocontrol, and stem cavity - to drain cavity of safety valve and through drain check valves with power hydraulic lines of stroke.
EFFECT: invention provides for automatic tension of caterpillar belts independently on load on master wheels.
SUBSTANCE: invention relates to the field of mining and may be used in designs of mining machines and other fields of machine building. Hydraulic system of mining machine control is additionally equipped with hydraulic cylinders of telescope tightening, in working manifolds of which there is a hydraulic valve installed with logical function "OR", as well as controlled check valve with control cavity, besides inlet manifolds of hydraulic valve with logical function "OR", which is installed in working manifolds of hydraulic cylinders for telescope tightening, are connected to outlet channels of hydraulic valves with logical function "OR", which are installed in outlet channels of hydraulic distributors for control of hydraulic cylinders of actuator lift and rotation, and control cavity of controlled check valve is connected to outlet channel of hydraulic valve with logical function "OR", which is installed in outlet channels of hydraulic distributor for control of hydraulic cylinder of telescope extension.
EFFECT: invention increases rigidity and reliability of support structures of mining machine actuator, improves durability of machine as a whole.
1 cl, 1 dwg
FIELD: construction industry.
SUBSTANCE: group of inventions refers to mining engineering and construction industry, namely to construction machine, particularly for vibration generation. Construction machine includes transfer mechanism, at least one hydraulic drive and hydraulic system for providing hydraulic drive with hydraulic medium. At that, at least one lubrication hydraulic line by means of which hydraulic medium can be supplied to transfer mechanism as lubrication means is branched off hydraulic system. At that, in lubrication hydraulic line there provided is dosing device by means of which supply of lubrication means can be changed depending on operating mode of transfer mechanism.
EFFECT: improving operating reliability of machine.
13 cl, 1 dwg
SUBSTANCE: group of inventions pertain to construction, namely, to hydraulic hammers hung on to construction excavators. Method of protection of the excavator from the influence of hydraulic hammer blowing mass of the hammer pin over the wedge of the hydraulic hammer according to which oscillation damping of the working equipment from the mass action of the hammer pin during its idle run is performed through main hydraulic cylinders of lead control. Oscillation damping of the working equipment is performed both through the main hydraulic cylinder and through a balancing pneumatic - hydraulic cylinder. Whereat balancing pneumatic - hydraulic cylinder is made with constant gas pressure characteristic, and head ends of main hydraulic cylinders of lead control are connected with hydropneumatic accumulator with variable characteristic of gas pressure in its air bladder.
EFFECT: facilitation of hydraulic hammer operation.
2 cl, 5 dwg
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.
FIELD: handling machinery, particularly soil-shifting, mining, agricultural and loading cyclic machines.
SUBSTANCE: device includes implement, main hydraulic cylinders and balancing hydraulic cylinder, at least one gas cylinder and hydropneumatic accumulator, main and additional hydrodistributors, as well as safety valve. Gas cylinder communicates with gas chamber of hydropneumatic accumulator. Device made in the first embodiment has the second additional hydrodistributor connecting working chambers of the main hydraulic cylinders with each other and with pump. Rod end of balancing hydraulic cylinder communicates with rod ends of the main ones. In the second embodiment additional hydraulic cylinder is arranged in main hydrodistributor case and connected to hydrolines of the main hydraulic cylinders through hydrolines. Additional hydrodistributor is installed so that additional hydrodistributor may connect working chambers of the main hydraulic cylinders with each other and with the pump when additional hydrodistributor is installed in the first position. Additional hydrodistributor being installed in the second position may connect working chambers of main hydraulic cylinders with each other and with drain. Rod end of balancing hydraulic cylinder is connected with rod ends of main hydraulic cylinders.
EFFECT: increased machine productivity due to increased implement hoisting speed.
3 cl, 4 dwg
FIELD: mechanical engineering, particularly hydraulically driven dredgers.
SUBSTANCE: drive comprises power plant with controlled power pumps having servo control taps, gear-box, hydraulic motors and hydraulic equipment. Hydraulic equipment has hydraulic distributor with address travel spool and its servo control taps, power hydraulic lines and servo control loop with hydraulic lines. The controlled power pumps may supply predetermined volume of working liquid at zero pressure in servo control lines thereof. Hydraulic lines for servo control of address travel spool have additional circuit including control unit, servo control lines and logical hydraulic OR valve with two inlet and one outlet taps. Hydraulic lines of servo control circuit included in additional loop are connected with inlet taps of hydraulic OR valve having outlet tap communicated with servo control taps of address travel spool.
EFFECT: provision of no-failure gear actuation in standing still dredger.
FIELD: mechanical engineering, particularly hydraulic systems for mobile machines.
SUBSTANCE: hydraulic system comprises hydraulic reservoir, controllable hydraulic pump with load-sensitive control slide, power hydraulic line protected with safety valve, main hydraulic distributor with three-position slide having one pressure supply means, two discharge lines, two working outlet means and line, which provides connection of each working outlet means with LS line, attached to control slide. The hydraulic system is provided with pressure control valve and with controllable reducing valve installed in LS line. Input and output of reducing valve are connected to hydraulic distributor and control slide correspondingly. Control line of reducing valve is linked to pressure control valve outlet. Inlet and discharge line of the pressure control valve are connected with power hydraulic line and with hydraulic reservoir correspondingly.
EFFECT: increased operational efficiency and reliability.
7 cl, 1 dwg
FIELD: earth-moving, mining, building machines and other wheeled and caterpillar handling periodically acting machines.
SUBSTANCE: device comprises working implement, main and balancing hydraulic cylinders, gas cylinder, main and additional working liquid distribution means. The piston cavity of balancing hydraulic cylinder is connected with gas cylinder. Additional distribution means may connect working cavities of main hydraulic cylinders one with another and with hydraulic pump during implement lifting.
EFFECT: increased working implement lifting speed without pump and system parameter change.
FIELD: mining industry, mechanical engineering, possible use in system for controlling caterpillar drive of mining machine.
SUBSTANCE: hydro-system contains pumps for caterpillar drive and pump, feeding system of working functions of machine, hydro-distributors for controlling caterpillar drive, driving hydro-motors and working mains, two controllable check valves and hydro-distributor for controlling system of machine working functions. Outlet channels of hydro-distributor for controlling system of machine working functions are connected to inlet channels of controllable check valves, which are connected between each other. Outlet channels of these valves are connected to working mains of driving hydro-motors and hydro-distributors for controlling caterpillar drive.
EFFECT: possible movement of mining machine in case of breakdown of driving pumps at the expense of influx of working liquid from pump driving system normally used for working functions of machine.
FIELD: earth moving machinery.
SUBSTANCE: invention relates to hydraulic drives of draw-booster gears of tractor-drawn scrapers. Proposed hydraulic drive contains pump, hydraulic tank, hydraulic cylinder, pressure valve connected in parallel with hydraulic cylinder, and hydraulic distributor. Hydraulic drive contains additionally hydraulic accumulator, time relay, check valve, pressure valve is provided with control line, and hydraulic cylinder has control arm engaging with two-position spool whose input is connected with pump and output, through time relay, with hydraulic accumulator and control line of pressure valve and with input of check valve whose output is connected to input of pressure valve.
EFFECT: provision of automatic continuous increase of adhesion weight of tractor of scraper when digging.
FIELD: earth-moving and transport machines, particularly blade assemblies having changeable width of cut.
SUBSTANCE: blade assembly comprises side sections and central section. The sections are provided with undercutting blades and are directly connected to bucket bottom. The central section is hinged to bucket bottom and is operated by rotation hydraulic cylinders through operation levers. Undercutting blades made as gussets are connected to inner edges of side sections from below. The gussets have supports to cooperate with central section in lower position thereof. Undercutting blades of central section are connected to outer side edges of central section. Undercutting gussets are provided with orifices to arrange fixers installed in lower parts of side sections so that they may cooperate with end switches. Position switches adapted to cooperate with operation levers of central section in central or extreme positions are mounted on bucket side walls. Hydraulic cylinders for central section rotation are linked in pairs to hydraulic cylinders for bucket operation. Lifting and lowering cavities of hydraulic cylinders are correspondingly communicated with raising and deepening cavities of hydraulic cylinders for central section rotation. Hydraulic drive for blade assembly includes hydraulically operated on-off three-way slide. The first outlet of the slide is united with the third one and is linked to raising cavity of hydraulic cylinder for central section rotation. Operational chamber and the first inlet of the slide are connected to outlet of pressure slide having output connected to lowering cavities of hydraulic cylinders for bucket operation. The second and the third inlets of on-off three-way slide are correspondingly connected to lifting cavities of hydraulic cylinders, which operate front bucket gate and lowering cavity of hydraulic cylinders for bucket operation.
EFFECT: decreased load to be applied to blade system during earth cutting as central section is in central and extreme positions, provision of automatic installation of above section in side blade plane and in extreme positions.
FIELD: mechanical engineering.
SUBSTANCE: group of invention relates to boom earth-moving, mine, construction and loading lifting-and-transporting machines of cyclic action. Proposed balancing system contains working equipment, boom hydraulic cylinders and balancing cylinder including hydraulic rod space and gas piston space connected with gas bottle, and distributors. According to first design version, hydraulic rod space of balancing cylinder is connected by hydraulic line with drain into hydraulic tank, and distributor of hydraulic liquid is installed for connecting in one position of spool, of boom hydraulic cylinders working spaces to each other with hydraulic pump. According to second design version, distributor is installed in system for connecting working spaces of boom hydraulic cylinders to each other and with hydraulic pump. According to third design version, rod space of balancing cylinder is connected with distributor installed for connecting, in one position of spool, of rod space of balancing cylinder with into hydraulic tank, and in other position, with hydraulic pump. Distributor is installed in hydraulic line of boom hydraulic cylinders for connecting, in one position of spool, of spaces of boom hydraulic cylinders to each other and with hydraulic pump.
EFFECT: increased capacity of machine owing to higher speed of lifting and lowering of working equipment.
5 cl, 6 dwg
FIELD: mechanical engineering, particularly earth-moving and construction equipment to be operated at low temperatures.
SUBSTANCE: device for hydraulic drive heating comprises heat engine and hydraulic pump kinematically connected with each other. Device also has liquid heat carrier circulation loop including heat accumulator. Heat pipe is connected to heat engine exhaust pipe through two-way valve. Heating member is arranged in tank and linked to heat engine generator.
EFFECT: increased simplicity and efficiency of hydraulic drive heating at negative ambient temperatures.