Boom machine implement balancing device

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.

4 dwg

 

The invention relates to earth moving, mining, construction and other wheeled and tracked lifting-transport machines circular action.

A device of the balancing forces of gravity working equipment : machines [1], containing operating equipment, main and balancing hydraulic cylinders, primary and secondary distributors, hydropneumatic accumulator, the control device further distributor, supply lines.

A disadvantage of this device is different loading main and balancing hydraulic cylinders boom, which reduces the efficiency of the operating equipment.

It is also known device trim work equipment : machines [2], containing the main and balancing hydraulic cylinders, primary and secondary distributors, hydropneumatic accumulator, the control device further allocator.

A disadvantage of this device is complex in structure and high cost of the hydropneumatic accumulator, which is the main element of this device.

The closest in technical essence of the known technical solutions is a device for counter-balancing force of gravity working equipment : machine [3], containing operating equipment, basic and balancing gidrol the Indra and gas cylinder, the hydropneumatic accumulator, valves fluid, a compensation of the leakage of the working fluid.

The drawback of the device [3] is a complex design due to the use of hydropneumatic accumulator, low lifting speed of the working equipment, small-capacity, high fuel consumption due to energy loss in the long hydrologists working equipment.

Object of the invention is a device for the balancing of work equipment, which allows to increase the lifting speed of the working equipment twice without changing the parameters of the hydraulic pump and system and to improve machine performance and reduce fuel consumption on the rise of the working equipment by reducing energy losses in the long hydrological by full exclusion and to increase the efficiency of the system.

The problem is solved due to the fact that in the known device, including operating equipment, basic and balancing hydraulic cylinders, gas cylinder, the valves of the working fluid, which according to the invention the piston chamber of the balancing cylinder is connected to a gas cylinder, with additional dispenser is mounted for connection working cavities of the main hydraulic cylinders between an IP by the water pump when lifting working equipment. Additional dispenser made in one body with the main dispenser.

The essence of the invention is that the system of balancing the forces of gravity working equipment by means of the balancing cylinder, a piston chamber which is connected to the gas tank, can significantly reduce the load of the hydraulic system work equipment and get connectivity working cavities of the main hydraulic cylinders and hydraulic pump when lifting working equipment. Thus the working fluid when the rise of the working equipment from the rod ends of the main cylinders are not discharged into the tank, and is served in the piston cavity of these cylinders, resulting in a constant supply of hydraulic pump lift speed of the working equipment will be doubled. The proposed device, the additional valve that solves the specified task, made in one body with the main valve, so there is a possibility for the machine to have two speed hoist working equipment: first normal and the second increased.

The invention is illustrated by drawings, where figure 1 shows a General view of a wheeled excavator with a balancing device consisting of the main and balancing cylinders; figure 2 - General view of huseni the aqueous excavator with a balancing device, containing the main and balancing hydraulic cylinders; figure 3 - General view of the wheel loader with the main and balancing cylinders; figure 4 shows a hydraulic control system work equipment with a system of balancing the forces of gravity.

The device of the balancing forces of gravity working equipment comprises equipment 1, the main cylinder 2, a balancing cylinder 3, the gas cylinder 4 (figure 4), the tank 5 of the balancing cylinder, a main valve 6, an additional valve 7, hydroline 8, 9, pump 10, the tank 11.

The device operates as follows. For lifting working equipment 1 spool of the main valve working fluid 6 include in the lower position, the working fluid from the hydraulic pump 10 is served in the piston cavity of the main cylinder 2. At the same time balancing piston chamber of the hydraulic cylinder 3 is connected by highway with a gas cylinder 4, the gas pressure on the piston 3 balances the force of gravity working equipment. In this regard, when the rise of the working equipment spend energy only on the rise of the payload in the bucket. Stop lifting carry out the installation of the slide valve of the distributor 6 to the neutral position shown in figure 4.

For lowering the working oborudovanie the slide valve of the distributor 6 include in the upper position, the working fluid from the hydraulic pump 10 serves in the rod end of the main cylinder 2, while the piston cavities of the cylinders 2, the working fluid is drained through the valve 6 into the tank 11.

Thus, with the help of distributor 6 are designed for the lifting and lowering work equipment in the pump mode with the usual speed lifting / lowering caused by the consumption of the water pump. Considered mode is balancing the forces of gravity working equipment, which provide significant savings in fuel consumption of the engine and reduce the load of the hydraulic system due to the reduced load on the main cylinder 2.

For the implementation of the rise of a working equipment with high speed include the additional spool valve 7 in the lower position. The working fluid from the hydraulic pump 10 serves simultaneously in the piston and the rod end of the main cylinder 2. Due to the fact that in this case, the active area of the main cylinder 2 is only the cross-sectional area of the rods, the flow rate of the hydraulic pump 10 provides increased speed of lifting. The pressure in the hydraulic system due to the smaller active area of the main cylinders, the rise of a working equipment with the load in the bucket is less than the standard g is crosstime without balancing the forces of gravity working equipment. To stop the accelerated rise of a working equipment additional spool valve 7 is set in the neutral position shown in figure 4.

For the implementation of fast biznesowego lowering work equipment the additional spool dispenser 7 includes in the upper position. While working cavity of the main hydraulic cylinders 2 are connected with a drain in the tank 11. When lowering work equipment gravity carry out the displacement of gas from the piston cavity of the balancing cylinder 3 in the gas tank 4.

In the balancing forces of gravity working equipment to get good fuel economy, and by increasing the speed of lifting and lowering work equipment reduce the cycle time of operation of the machine and increase the productivity and overall efficiency of the machine.

Sources of information

1. Copyright certificate №543715, CL E 02 F 9/22, BI No. 3, 1977.

2. Copyright certificate №804793, CL E 02 F 9/22, BI No. 6, 1981.

3. Patent for invention No. 2190062, CL E 02 F 9/22, BI No. 27, 2002.

Device trim work equipment : machine containing operating equipment, basic and balancing hydraulic cylinders, gas cylinder, primary and secondary distributors working fluid, wherein the piston is a first cavity of the balancing cylinder is connected to a gas cylinder, additional dispenser is mounted for connection working cavities of the main hydraulic cylinders and hydraulic pump when lifting working equipment.



 

Same patents:

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: 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.

2 dwg

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: 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.

4 dwg

The invention relates to earth-moving machinery, namely the hydraulic working bodies scraper

The invention relates to the construction and mining technique, namely, to drive vehicles cyclic actions

The invention relates to the construction and mining technique and can be used, for example, in a single bucket excavators

The invention relates to loaded, earthmoving, mining and other lifting-transport machines cyclic actions

The invention relates to the field of building and road machines, namely, the front shovel loaders

Front loader // 2235170
The invention relates to the field of building and road machines, namely, the front shovel loaders

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.

4 dwg

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.

2 dwg

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.

4 dwg

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.

1 dwg

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.

3 dwg

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.

9 dwg

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.

1 dwg

Up!