Energy-saving device of work equipment of boom machine

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.

5 dwg

 

The invention relates to strelovym shovel construction machines, namely to shovel, front loaders cyclic operation.

Known energy saving working equipment excavator [patent No. 2190062, 27.09.2002, BI No. 27] [1], comprising a boom, bucket, main boom cylinders, balancing the hydraulic cylinder, gas cylinder, hydropneumatic accumulator, hydraulic valve, hydraulic pump. The device is designed to balance the forces of gravity of the boom, bucket, hydraulic cylinders to avoid energy losses.

The disadvantage of this device is a complex structure due to the use of the hydropneumatic accumulator, the use of which leads to an increase in volume of the working fluid of the hydraulic system, having a higher cost compared with the cost of air when used as the working fluid.

The closest to the proposed device to the technical nature of the known technical solutions is an energy-saving system of work equipment crane machine [RF patent №2299296, 20.05.2007, BI No. 14] [2], comprising a boom, bucket, boom cylinders, balancing cylinder, gas cylinder, dispenser. The system eliminates energy losses due to the lifting forces of gravity working equipment.

A disadvantage of the known device [2] is carried�perfect energy saving design of the cylinder and the gas cylinder; the lack of recommendations on the choice of the design parameters of the system.

The object of the invention is the creation of energy-saving devices operating equipment allows to simplify the design of the device eliminates the loss of energy when lifting forces of gravity working equipment, which allows to reduce the consumption of energy and fuel by an internal combustion engine.

The task is solved due to the fact that in the known device, including boom, bucket, main boom cylinders, power cylinder, gas cylinder, valve, piston rod cavity of the cylinder energy saving, which according to the invention a gas cylinder filled with compressed air under pressure more than 10 MPa, the piston cavity of the balancing cylinder is connected directly through the hole in the cylinder wall with the cavity of the gas cylinder; the rod cavity of the power saving of the cylinder is connected through the valve with a drain line; in this case, the total volume of the gas cavity energy saving cylinder and the gas cylinder is more than two volumes of the working stroke of cylinder energy saving.

The technical result is achieved by use of compressed air instead of expensive working fluid and the simplified design of the device. Energy�egenie is achieved by storing a volume of compressed air at recurring periodic cycles of lifting and lowering the boom. A single injection of compressed air in the gas tank ensures long working life of the device provides a reduction in the loading of the main cylinders during lifting of the boom and bucket with load.

The invention is illustrated by drawings, where Fig. 1 shows the use of energy-saving devices during the digging of the soil excavator "backhoe"; Fig. 2 shows the use of energy-saving devices on the front loader; Fig. 3 shows the connection of the energy-saving device to the hydraulic system of the crane machine; Fig. 4 presents the energy-saving device in the initial position when lowered the boom; Fig. 5 - the energy-saving device with a raised arm.

The energy-saving device operating equipment crane machine contains: arrow 1; bucket 2; main boom cylinders 3; energy saving 4 cylinder; gas cylinder 5; the brake hose 6; dispenser 7; hydrosaluric 8; a hydraulic pump 9; the building energy-saving cylinder 10, the piston rod 11; the eyelet of the rod 12; the eyelet of the housing 13; the nut 14; a lock nut 15; fitting 16; hole in the casing 17; discharge device 18; the charger 19; mount 20 of the gas cylinder on the cylinder surface.

Fig. 4, 5 additionally shows: - working stroke of the piston cylinder energy saving; VG- the volume of a gas cylinder; P- working volume of energy-saving cylinder; V1- the volume of the cavity of the rod and piston; V2- residual volume of energy-saving cylinder; V3- volume hydraulic rod ends hollow cylinder energy saving.

The essence of energy-saving device is as follows. To perform the operation of the lifting boom of the excavator of Fig. 1 of the loader of Fig. 2 includes a spool dispenser 8 down 7, the working fluid by the hydraulic pump 9 is fed into the piston cavity of the main cylinders 3, carrying a boom lift. At the same time without participation of the operator comes into operation the energy-saving device.

Energy saving 4 cylinder creates additional force on the rod, which reduces the power in the main boom cylinders and consequently reduces the load on the engine, saving energy and fuel. Spillover effects of energy-saving devices is to increase the life of the engine and pumps while increasing performance.

To lower the boom spool dispenser 8 include up, the working fluid from the hydraulic pump flows into the stem cavity of the main cylinders 3. The gravity of the boom, bucket, hydraulic cylinders allow movement of the piston and rod of energy-saving cylinder�RA down to the starting position, without consuming additional energy from the engine.

Fig. 4 initial volume of the gas chamber when lowered the boom is equal to the sum of volumes

where VG- the volume of a gas cylinder; V1- the volume of the cavity of the rod and piston; V2- residual volume of the balancing cylinder.

When lifting the boom, the volume of the gas cavity of the energy saving device increases by an amount of stroke of the piston.

where D, H - respectively, the diameter of the cylinder energy saving and stroke.

Efficient operation of energy-saving devices provided by the fact that when the piston moves from the bottom position (Fig. 4) in the upper position (Fig. 5) the pressure in the gas cylinder remains almost constant.

To ensure this condition requires that the total volume of the gas cavity was more than two volumes of the working stroke of cylinder energy saving.

To ensure the efficient operation of energy-saving devices is provided by a disposable injection device with compressed air at a pressure of about 10 MPa.

When raising / lowering the boom, the volume of the stem cavity V3changes, providing lubrication to the cylinder walls and piston working fluid.

The energy-saving device equipped working�I crane machine, containing boom, bucket, main boom cylinders, includes energy saving cylinder, gas cylinder, valve, piston rod cavity energy saving cylinder, wherein a gas cylinder filled with compressed air under pressure more than 10 MPa, the piston cavity of the balancing cylinder is connected directly through a hole in the wall of the body cavity with a gas cylinder, the rod cavity of the power saving of the cylinder is connected through the valve with a drain line, wherein the total volume of the gas cavity energy saving cylinder and the gas cylinder is more than two volumes of the working stroke of cylinder energy saving.



 

Same patents:

FIELD: machine building.

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2 cl, 4 dwg

Valve cluster // 2529543

FIELD: machine building.

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15 cl, 4 dwg

FIELD: physics; control.

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2 cl, 8 dwg

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4 dwg

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4 dwg

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2 dwg

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7 cl, 1 dwg

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4 dwg

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1 dwg

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3 dwg

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9 dwg

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5 cl, 6 dwg

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EFFECT: increased simplicity and efficiency of hydraulic drive heating at negative ambient temperatures.

1 dwg

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