Method of counterbalancing of forces of gravity of working equipment of jib machines and device for its implementation

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

 

The invention relates to methods and devices for balancing the forces of gravity working equipment jib excavation, loading and transport vehicles cyclic steps, namely, the front shovel loaders, excavators.

There is a method of balancing the forces of gravity working equipment : machine implemented in the device [see, for example, patent RF №2258115 C2, E02F 9/22, publ. 10.08.2005, bull. No. 22], containing operating equipment, basic and balancing hydraulic cylinders, gas cylinder is connected with a gas cavity of the hydropneumatic accumulator. The disadvantage of this method and of the device design is the complexity caused by the use of hydropneumatic accumulator, which increases the volume of the hydraulic system : the machine and its complexity.

Of the known methods and technical solutions the closest to the technical nature of the claimed object is a method and device for balancing the forces of gravity working equipment : machine [see, for example, patent RF №2236515 C1,7E02F 9/22, published 20.09.2004, bull. No. 26], containing operating equipment, main and balancing cylinders, gas cylinder is charged with compressed air, connected with the piston cavity of the balancing cylinder, with a balancing cylinder is located inside the gas b is Llona.

The disadvantages of the known methods and devices is the use of the balancing cylinder of traditional design, working cavities which are connected with the hydraulic tank long highways and irrational design of the balancing cylinder from the point of view of the use of metal and beneficial use of volume as void in the cylinder filled with expensive working fluid.

The task is a way of balancing the forces of gravity working equipment jib cars, including cast gravity of the boom and elements of the working equipment to the shaft of the balancing cylinder, the operation of the trim shows the forces on the rod by the force of pressure of the compressed gas into the piston cavity of the balancing cylinder, the operation of stabilizing the pressure of the compressed gas, the method further perform the operation of sealing the piston cavity compressed gas balancing cylinder from the atmosphere connection variable displacement rod cavity filled with lubricating fluid, with the body of a deformable pnevmostartery low pressure, the operation of stabilizing the pressure in the gas cavity is achieved by increasing the volume of the gas cavity high pressure due to the execution of stock and the balancing piston cylinder hollow, in this case ur is namasivayam cylinder and gas cylinder is a device, made in one case.

The objective of the device of the balancing forces of gravity working equipment jib cars, including a counterbalancing cylinder and gas cylinder according to the invention includes a housing of the balancing cylinder with the rod and the piston, which is located inside the gas cylinder is charged with compressed air; rod cavity of the balancing cylinder filled with a lubricating fluid, which is connected to the housing, in which is installed pneumonia low pressure, the piston and rod of the balancing cylinder is made hollow.

This technical result in part a way of balancing is to implement the operation of bringing gravity to the shaft of the balancing cylinder, the operation of the counter-balancing force on the rod by the pressure of compressed air in the piston cavity of the balancing cylinder; the use of gas chambers to stabilize the magnitude of the changes in the gas pressure when lifting, lowering work equipment, the efficient use of the volume occupied by the device, is achieved by connecting one unit the functions of the balancing cylinder and gas cylinder.

This technical result in part of the device consists in the use of the balancing cylinder housing to the th is located inside the gas tank, this results in efficient use of space and reduces the amount of used fluid; connecting the rod end of the balancing cylinder filled with a lubricating fluid with the body, which is deformable pneumonia filled with compressed air under low pressure, ensure the sealing of the volume of the gas cavity high pressure from the atmosphere.

Use in the invention as a working body of compressed gas instead of the hydraulic fluid can improve the efficiency of the device by reducing internal losses. The volume occupied by the balancing cylinder, can be comparable with the size of the cylinder is of a traditional design.

The task at the balancing forces of gravity working equipment including a counterbalancing cylinder and gas cylinder, which according to the invention the housing of the balancing cylinder with the rod and piston are located inside the gas tank; charged with compressed air; rod cavity of the balancing cylinder filled with a lubricating fluid, is connected to the housing, in which is installed Primobolan low pressure, the piston and rod of the balancing cylinder is made hollow.

The method and the device are explained with drawings the, which figure 1 is a perspective view of an excavator with a balancing device; figure 2 shows a front loader with a device trim; figure 3 shows a device trim in the folded position when lowered the boom; figure 4 shows a device trim with extended spindle while lifting the boom. The device of the balancing forces of gravity working equipment includes: 1 - body balancing cylinder; 2 - stem; 3 - balancing piston cylinder; 4 - eyelet rod; 5 - piston seal; 6 - the body of the gas cylinder; 7 - eyelet gas cylinder; 8 - Buchs housing of the balancing cylinder with connection thread; 9 - Buchs housing of the balancing cylinder rod seals and threaded to housing pnevmostartery; 10 - stem seal; 11 - case pnevmostartery low pressure; 12 - pneumonia; 13 - channel, 14 - rod cavity; 15 - the space between buildings; 16 - bearing housing of the balancing cylinder; 17 - hole in the support body; 18 - piston gas cavity high pressure, is filled with compressed air; 19 - the inner cavity of the piston and rod, filled with compressed air; 20 - main hydraulic cylinders boom (1, 2).

In figure 1, 2 additionally shows: T - power in the balancing cylinder; Gwith, Gp, Gto, Gg- gravity, respectively, arrows, recoat is, bucket, the actual bucket. Nature of work a way of balancing the forces of gravity working equipment jib machines is to implement the following operations. The forces of gravity of the elements of the working equipment to the shaft of the balancing cylinder carried by the equation

where T is a given force on the shaft of the balancing cylinder; Gihiaccordingly gravity and shoulders relative to the hinge rotation arrows on the portal; h - the shoulder of the balancing cylinder.

The trim operation is given gravity by the pressure of compressed air in the piston cavity of the cylinder is determined by the expression

where p is the pressure of compressed air; D - diameter of the stem.

Lifting boom excavator, loader accompanied by some increase in the volume of the gas cavity, when lowering the boom, the volume of the gas cavity is reduced.

To stabilize the pressure of the compressed air in the gas cavity volume is condition

where VG- volume cavities of compressed gas; VC- the working volume of the balancing cylinder.

Nature of work a way of balancing lies in the sequence of operations. The cast is gravity working equipment allows the usredotociti distributed gravity working equipment excavator, the truck on the shaft of the balancing cylinder. The operation of balancing is to balance the given force on the rod by the pressure of the gas in the cross-sectional area of the rod, the operation of stabilizing the pressure when lifting, lowering is provided by selecting the appropriate volume of the gas cavity device trim. The operation of raising and lowering the boom associated with the volume change rod lubricating and sealing the cavity 14, which is provided by compression during lifting and extension when lowering the boom volume pnevmostartery 12, charged with air under low pressure.

Balancing device mounted on figure 1, figure 2 between the main hydraulic cylinders boom reduces the pressure of the working fluid in the hydraulic cylinders boom when the bucket is being raised with the load.

The device of the balancing forces of gravity working equipment excavator, loader works as follows. When lifting boom excavator, loader main cylinder 20 and a balancing cylinder 1, in which the rod 2 creates a constant force, which is defined by the formula (2). Force T on the rod is an additional lifting force, which remains almost constant during the whole cycle of work equipment and reduces the effort and pressure in the main hydraulic cylinders 20 p the crystals. In the process of lifting decreases the volume of the rod end 14, which is filled with lubricating fluid and performs the function of sealing cavities high pressure from the atmosphere. Lubricating fluid for lifting the boom is pushed into the housing 11, which has pneumonia 12 toroidal shape, filled with air under low pressure. Due to the deformation of the air in pneumacare 12 lubricating fluid from the rod end 14 flows into the housing 11. When lowering the boom the process is performed in reverse sequence. In the lower position of the boom bearing housing 16 of the cylinder 1 does not interact with the piston 3.

The gas passage 15 between cases 1, 6 has a constant volume, which is communicated by the holes 17 with a gas volume 18. Therefore, all the internal gas volume of the device is filled with compressed air and communicated among themselves.

The balancing piston 3 of the cylinder and the piston rod 2 is made hollow, the pressure in the cavities 15, 18, 19 in all operations work the same and equal to the pressure p of the charging device with compressed air.

When lowering the boom piston rod enters into the housing of the balancing device, with all the phenomena considered in the process of lifting, proceed in reverse order.

Method and device for balancing the forces of gravity raboteg the equipment are high, allowing to increase the efficiency of work equipment.

1. A way of balancing the forces of gravity working equipment jib cars, including cast gravity of the boom and elements of the working equipment to the shaft of the balancing cylinder, the operation of the trim shows the forces on the rod by the force of pressure of the compressed gas into the piston cavity of the balancing cylinder, and the operation of stabilizing the pressure of the compressed gas, characterized in that it further perform the operation of sealing the piston cavity compressed gas balancing cylinder from the atmosphere connection variable displacement rod cavity filled with lubricating fluid, with the body of a deformable pnevmostartery low pressure, the operation of stabilizing the pressure in the gas cavity is achieved by increasing the volume of the gas cavity high pressure due to the execution of stock and the balancing piston cylinder hollow, the housing of the balancing cylinder and gas cylinder is a device made in one case.

2. The device of the balancing forces of gravity working equipment jib cars, including a counterbalancing cylinder and gas cylinder, characterized in that the housing of the balancing cylinder with a piston rod and a piston positioned within a housing of the gas is about the cylinder, charged with compressed air; rod cavity of the balancing cylinder filled with a lubricating fluid, is connected to the housing, in which is installed pneumonia low pressure, the piston and rod of the balancing cylinder is made hollow.



 

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1 dwg

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