CN2147390Y

CN2147390Y - Filling material box seat for centre adjustable reciprocating piston compressor

Info

Publication number: CN2147390Y
Application number: CN 92228765
Authority: CN
Inventors: 艾绍奎
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-07-29
Filing date: 1992-07-29
Publication date: 1993-11-24
Anticipated expiration: 2002-07-29

Abstract

The utility model relates to a packing box seat for compressors. Compared with an existing packing box seat for compressors, the utility model is composed of an outer sleeve (2), an inner sleeve (3), a press cover (8), a lip type sealing ring (10), etc. The inner sleeve can be adjusted synchronously with the piston rod of a compressor to eliminate the alternate load on the inner surface of the packing box seat, which is caused by the deviation of the piston rod and the shaft line of the packing box, so that the compressed air in the compressor cylinder can be efficiently prevented from leaking out.

Description

Filling material box seat for centre adjustable reciprocating piston compressor

The utility model is a kind of being installed on the compressor casing, stops the device of the interior pressurized gas of cylinder body along piston rod movement direction gas leakage.

The to-and-fro motion of present big-and-middle-sized reciprocating-piston compressor is by crank (1), connecting rod (2), crosshead (3), piston rod (4), cylinder (6)), piston mechanisms such as (7) forms, referring to figure＜1 〉, in order to prevent the leakage of pressurized gas in the cylinder, on cylinder block, installed packing seal assembly (5), according to gas pressure difference in the cylinder, the packing seal assembly is made up of the Stuffing box of varying number, usually claim that first Stuffing box near cylinder is the filler block, it plays crucial effects to the sealing of gas in the entire cylinder, but at present employed filler block two serious problems is arranged: first, design reckons without the factor after the assembling, in design, the compressor piston rod crosshead, slideway, filler block, piston, cylinder are all on same shaft axis, but assembling owing to be subjected to the crankshaft operation direction, the influence of factors such as member gravity, piston rod, piston, crosshead all will be sunk, skew, design prefix and crosshead slideway gap are △ 1, the gap of piston rod and filler block is △ 2, the gap of piston and cylinder is △ 3, because the design function in these three gaps, so modular construction size difference in addition is also difference of the value in gap, and always △ 1 greater than △ 2, △ 3, sinks so △ 2 just hinders the skew of having made piston rod greater than △ 2, piston rod is subjected to bending at this, and friction is aggravation seriously.Second, Maintenance and Repair are very difficult, in compressor operation, crosshead, slideway is behind the cylinder wear, the piston rod axis is subjected to the influence of crosshead active force and is offset, in order to guarantee gas seal in the cylinder, filler block endoporus size can not be strengthened again, cause piston rod, the Stuffing box base inner surface bears tension and compression, alternate load causes the slippage of wear surface when serious and peels off, and sealing can not guarantee, in order to address this problem, normally at Stuffing box base inner surface lining with the anti-friction bearing alloy, or unit engineering plastic filler, but can not solve the problem of piston rod and filler block shaft axis decentraction.

The purpose of this utility model is the compressor packing block that a kind of adjustable axle heart line will be provided, and its internal surface can be adjusted arbitrarily with the axis change of compressor piston rod.

The purpose of this utility model be achieved in that will be contained in filler block endoporus on the compressor casing strengthen, places one in cover, between interior cover and the overcoat certain clearance is arranged, to guarantee that when assembling is adjusted interior cover can be mobile simultaneously with piston rod.

But the utility model is owing to adopted aligning compressor packing block, the filler block and the piston rod axle center line offset problem that cause owing to after design, assembling, the mechanical wear have been eliminated, reduce the wearing and tearing heating, made piston rod and filler block keep less matching gap, guaranteed sealing effect.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.

Figure＜1〉is a reciprocating-piston compressor driving mechanism schematic representation, crank＜1 〉, rotate, drivening rod＜2 〉, crosshead＜3 〉, piston rod＜4 〉, piston＜7〉are reciprocating, Stuffing box assembly＜5〉is installed on the compressor casing＜6 〉, prevents that gas is revealed along the piston rod direction in the compressor casing.Figure＜2〉be among the figure＜1〉part＜5〉but---aligning Stuffing box seat sectional drawing, should install concrete structure and effect is illustrated below with reference to figure＜2 〉.

Overcoat＜2 〉, plain cushion＜1〉are installed on the compressor cylinder block, and plain cushion＜1〉prevents gas leakage in the cylinder.In cover＜3〉be contained in the overcoat＜2 〉, and and piston rod＜11〉is tight cooperates, by means of the support of metal hollow C type circle＜4 〉, can be together mobile in overcoat＜2〉with piston rod＜11 〉.Plain cushion＜7〉prevents that gas is revealed in the cylinder in the middle of overcoat＜2〉and interior cover＜3 〉.Spacer ring＜5〉abuts against on the wall of overcoat＜2 〉, prevents that impurity enters matching surface in the cylinder.Gas acts in the lip-type packing＜10〉after interior cover＜3〉throttling in the cylinder, and lip-type packing＜10〉can be according to the pressure of gas from motive sealing, the back free expansion of being heated.The axial displacement of elasticity O type circle＜9〉limiting component＜10 〉, and play the axial seal effect, overcoat＜2〉and gland＜8〉are located with the cylinder tip＜6 〉.Be this device each member relative position under the reciprocating state of piston rod shown in the figure.

Adjusting method of the present utility model is fairly simple, no matter be new assembling or in maintenance, as long as earlier piston rod and crosshead are connected locking earlier, again with the stuffing gland bolton, the axis of cover＜3〉is promptly in to adjust in the filler block.

Claims

But 1, a kind of aligning Stuffing box seat that stops the interior pressurized gas of compresser cylinder to be revealed along the piston rod movement direction, main structure is by overcoat (2), interior cover (3), gland (8), plain cushion (7), metal hollow C type circle (4), spacer ring (5), lip-type packing (10) and elasticity 0 type circle (9) are formed, and it is characterized by between interior cover (3) and the overcoat (2) has certain clearance, interior cover (3) relies on metal hollow C type circle (4), can adjust arbitrarily with compressor piston rod in the gap.
But 2, aligning compressor packing block according to claim 1, it is characterized in that interior cover (3) endoporus can and piston rod (11) surface tightly cooperate.
But 3, aligning compressor packing block according to claim 1, it is characterized in that having installed in the filler block lip-type packing (10), its axial displacement is with elasticity O type circle (9) restriction, and lip-type packing can be according to the pressure of gas from motive sealing, the free expansion of being heated.