CN201412302Y

CN201412302Y - Piston reciprocating air compressor totally without oil lubrication

Info

Publication number: CN201412302Y
Application number: CN2009201723801U
Authority: CN
Inventors: 汪潜
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-06-03
Filing date: 2009-06-03
Publication date: 2010-02-24
Anticipated expiration: 2019-06-03

Abstract

The utility model discloses a piston reciprocating air compressor totally without oil lubrication, which has a crankcase that is obtained by combining the upper half crankcase and the lower half crankcase. The crankshaft is obtained by combining a left half crankshaft and a right half crankshaft. The left crankshaft is formed by a non-power input end main journal and a non-power input end crank which are connected together. The right crankshaft is formed by a power input end main journal, a power input end crank and a crank pin which are connected together. An end of the crank pin is insertedinto a crank pin installing hole on the non-power input end crank so that the left half crankshaft and the right half crankshaft are connected to a whole crankshaft. The combination crankshaft adoptedby the piston reciprocating air compressor reduces the axial length for one third to one half compared with the snake-shaped crankshaft under the precondition that a same technical requirement is obtained. The piston reciprocating air compressor has the advantages of compact structure of the whole machine, easily detaching and installation of the crankshaft and crankcase, greatly reduced using cost, and suitability for the piston reciprocating air compressor which totally has no oil lubrication and has a larger air displacement that is larger than 2.5m<3>/min.

Description

Full-oil-free lubrication piston reciprocating air compressor

(1) technical field:

The utility model relates to a kind of air compressor, relates in particular to a kind of full-oil-free lubrication piston reciprocating air compressor of big air displacement.

(2) background technique:

Pressurized air is extensive use of by the industry-by-industry in the national economy just more and more, more and more higher along with social progress and environmental requirement, oil-free compressed air is subjected to the favor to departments such as the higher medicine of source of the gas quality requirements, chemical industry, electronics, laser, national defence especially.The compressed-air actuated equipment that can produce pure no oil and technology maturation at present mainly contains piston compressor, oil free screw formula compressor and centrifugal compressor.Wherein oil free screw formula compressor host head core technology is developed by a few air compressor giant American-European and Japan, but blockade on new techniques is very strict, and price of complete machine costliness, technological scheme separately are also different fully, and close middle and high having a meeting, an audience, etc. well under one's control, oil free screw formula compressor is still not competent.Centrifugal compressor is only applicable to big air displacement and super large air displacement occasion, and manufacturing technology own requires high, requires very tight to user's scale and attendant's professional standards.Traditional piston compressor has remarkable advantages, and is wide as pressure range, efficient is high, adaptability is strong etc., still is widely adopted.Do not have oily piston type air compressor and mainly contain two kinds of structures: take the full-oil-free lubrication structure in the micro computer field, need not add thin oil lubricant in the compressor body, all can reliably produce the pressurized air that does not contain oil content in the whole Life cycle of machine; Take " half does not have oil " structure in small-sized, medium-sized and large scale computer field; only in cylinder, realize oil-free lubrication; still adopt thin oil lubricant at positions such as bent axle, connecting rods; only between connecting rod and cylinder, set up a distance piece; so can not guarantee all reliably to produce oil-free compressed air, " scurrying oil " phenomenon occur through regular meeting in the whole Life cycle of machine.Present stage can be realized the micro computer of full-oil-free lubrication structure, and general air displacement is at 2.5m ³Below/the min, air displacement is at 2.5m ³The relatively large machine that/min is above, domestic and even appearance yet in the world.The micro computer of the full-oil-free lubrication structure of common in the market less air displacement does not have lubricant oil in its crankcase, and the sealed type bearing of grease lubrication is installed at the two ends of bent axle; At connnecting rod big end the sealed type bearing of grease lubrication is installed, this bearing inner race cooperates with bent axle; At connecting rod small end needle bearing is installed, and seal ring is installed in the connecting rod small end both ends of the surface; Piston ring on the piston and guide ring all adopt the self lubricating material manufacturing.The more bent axle of micro computer employing at present is snakelike bent axle, and snakelike bent axle is made up of main journal, crank and crank pin three parts, is overall structure.From technical standpoint, make the full-oil-free lubrication air compressor of big air displacement, if still adopt the structure of micro computer, it is worthless amplifying in proportion simply, because after adopting the snakelike bent axle of micro computer, will inevitably increase the axial dimension of bent axle, can cause crankcase, the connecting rod all physical dimension and the amplification at double of essential factor adaptation bent axle so on the one hand, can cause the force-bearing situation of bent axle own to worsen on the other hand, suffered power becomes big on the same unit area, cause crankshaft fatigue easily, and can not guarantee strength of crankshaft and rigidity.Moreover main machine structure is huge, will cause manufacture cost higher, and cost performance is low, is difficult to be accepted by market.

(3) summary of the invention:

Technical problem to be solved in the utility model just provides a kind of full-oil-free lubrication piston reciprocating air compressor of big air displacement, and its air displacement is at 2.5m ³More than/the min, do not contain lubricant oil in the pressurized air of discharge, and compact integral structure, easy to maintenance, greatly reduce user cost.

In order to solve the problems of the technologies described above, the technical solution that full-oil-free lubrication piston reciprocating air compressor of the present utility model adopted is such: piston ring and guide ring that it comprises crankcase, bent axle, connecting rod, cylinder, piston and takes self lubricating material to make, all bearings all adopt grease lubrication, crankcase is combined by first crankcase and second crankcase two-part, is flexible connection between first crankcase and second crankcase; Bent axle is combined by a left side half bent axle and right half bent axle two-part, and left half bent axle is made of non-power intake main journal that fuses and non-power intake crank, and non-power intake crank is provided with the crank pin mounting hole; Right half bent axle is made of the power intake main journal that fuses, power intake crank and crank pin, and insert in the crank pin mounting hole on the non-power intake crank termination of crank pin, makes left half bent axle and right half bent axle be connected to become an integral shaft; Non-power intake main journal and power intake main journal are separately fixed on the main bearing on crankcase both sides.

After adopting technique scheme, because the bent axle of full-oil-free lubrication piston reciprocating air compressor of the present utility model is combined by a left side half bent axle and right half bent axle two-part, a left side half bent axle is made of non-power intake main journal that fuses and non-power intake crank, non-power intake crank is provided with the crank pin mounting hole, right half bent axle is by the power intake main journal that fuses, power intake crank and crank pin constitute, insert in the crank pin mounting hole on the non-power intake crank termination of crank pin, make left half bent axle and right half bent axle be connected to become an integral shaft, non-power intake main journal and power intake main journal are separately fixed on the main bearing on crankcase both sides, compare with the snakelike bent axle that micro computer is adopted, the assembled crankshaft that the utility model adopted is reaching under the same technical request, axial length has shortened 1/3rd to 1/2nd, thereby reduced warping stress, avoid crankshaft fatigue, guarantee crankshaft strength and rigidity, and make the crankcase of this machine, connecting rod does not need to amplify because of the physical dimension that adapts to bent axle changes at double; Because crankcase is combined by first crankcase and the flexible connection of second crankcase two-part, therefore greatly facilitate the assembling of crankshaft group again.The utility model does not have to amplify in proportion simply the complete machine structure size on the basis of traditional micro computer, compact integral structure, economical with materials consumption and taking up room, but bent axle and crankcase be easy removal and installation all, maintaining is simple and convenient, greatly reduce user cost, do not contain lubricant oil in the pressurized air that it is discharged, be applicable to that air displacement is at 2.5m ³The big air displacement full-oil-free lubrication piston reciprocating air compressor that/min is above.

(4) description of drawings:

Fig. 1 is the schematic representation of the utility model full-oil-free lubrication piston reciprocating air compressor;

Fig. 2 is the structural representation of first crankcase and second crankcase in the air compressor shown in Figure 1;

Fig. 3 is the structural representation of left half bent axle and right half bent axle in the air compressor shown in Figure 1.

(5) embodiment:

In conjunction with Fig. 1, Fig. 2, Fig. 3 as seen, full-oil-free lubrication piston reciprocating air compressor of the present utility model does not adopt thin oil lubricant, there is not lubricant oil in the crankcase of air compressor, crankcase is combined by first crankcase 1 and second crankcase 2 two-part, first crankcase 1 and second crankcase 2 are equipped with the corresponding screw 3 in several positions, flexibly connect by screw between first crankcase 1 and second crankcase 2.Bent axle is combined by a left side half bent axle 4 and right half bent axle, 5 two-part, and left half bent axle 4 is made of non-power intake main journal 6 that fuses and non-power intake crank 7, and non-power intake crank 7 is provided with crank pin mounting hole 8.Right half bent axle 5 is made of the power intake main journal 9 that fuses, power intake crank 10 and a crank pin 11, insert in the crank pin mounting hole 8 on the non-power intake crank 7 termination of crank pin 11, makes left half bent axle 4 and right half bent axle 5 be connected to become an integral shaft.Power intake main journal 9 terminations of right half bent axle 5 pass outside the crankcase, on power intake main journal 9, be equipped with the main bearing 12,12 of two grease lubrications ', one of them main bearing 12 is positioned at power intake main journal 9 outer ends, and be fixed on the power intake bearing support 13 of crankcase, these main bearing 12 end faces are equipped with grease seal circle 14; Another main bearing 12 ' be positioned at power intake crank 10 outsides, and being fixed on the power intake bearing support 13 of crankcase, this main bearing 12 ' end face be provided with grease seal circle 14 '.On non-power intake main journal 6, be equipped with the main bearing 15,15 of two grease lubrications ', one of them main bearing 15 is positioned at the termination of non-power intake main journal 6, and be fixed on the non-power intake bearing support 16 of crankcase, these main bearing 15 end faces are provided with grease seal circle 17; Another main bearing 15 ' be positioned at non-power intake crank 7 outsides, and being fixed on the non-power intake bearing support 16 of crankcase, this main bearing 15 ' end face be provided with grease seal circle 17 '.Since non-power intake main journal 6 and power intake main journal 9 be separately fixed at each two main bearing 15,15 on crankcase both sides ' and 12,12 ' on, so the other end of crank pin 11 inserts in the crank pin mounting hole 8 on the non-power intake crank 7, after making left half bent axle 4 and right half bent axle 5 be connected to become an integral shaft by finger setting, the proper functioning of bent axle can not be affected.At the major part of connecting rod 18 bearing 19 of grease lubrication is installed, and in the major part both ends of the surface of connecting rod 18 grease seal circle 20 is installed, these bearing 19 inner rings cooperate with the crank pin 11 of bent axle.The microcephaly of connecting rod 18 needle bearing 21 of grease lubrication is installed, and grease seal circle 22 is installed in connecting rod 18 microcephaly's both ends of the surface.All bearings of the utility model air compressor all adopt grease lubrication, and design has the grease seal circle to leak with grease-proof.Piston ring 25 and guide ring 26 on cylinder 23 inner carriers 24 all adopt nonmetal self lubricating material manufacturing, can guarantee that pressurized air does not contain oil content.In addition, be provided with on the power intake bearing support 13 of crankcase with power intake main journal 9 on the fuel filler neck 27 of two main bearings 12,12 ' be connected, be provided with on the non-power intake bearing support 16 of crankcase with non-power intake main journal 6 on the fuel filler neck 28 of two main bearings 15,15 ' be connected, on the major part of connecting rod 18, be provided with the fuel filler neck 29 that is connected with bearing 19, the purpose that above-mentioned fuel filler neck is set is in order to replenish grease as required in good time, to guarantee the long-time reliable operation of machine.

Described main bearing 12,12 ', 15,15 ' and bearing 19, needle bearing 21 all are the standard piece that on market, can directly buy, according to payload, operating conditions etc. suitably select model to get final product; The size of bent axle, the quantity of connecting rod and size are determined according to design pressure, designing and arranging tolerance; The self lubricating material that described piston ring 25 and guide ring 26 adopt can be nonmetal self lubricating materials such as filled polytetrafluoroethylene, polyether-ether-ketone.Above-mentioned variation is all to realize the purpose of this utility model degree of being.

Claims

1, a kind of full-oil-free lubrication piston reciprocating air compressor, the piston ring (25) and the guide ring (26) that comprise crankcase, bent axle, connecting rod (18), cylinder (23), piston (24) and take self lubricating material to make, all bearings all adopt grease lubrication, it is characterized in that: crankcase is combined by first crankcase (1) and second crankcase (2) two-part, is flexible connection between first crankcase (1) and second crankcase (2); Bent axle is combined by a left side half bent axle (4) and right half bent axle (5) two-part, a left side half bent axle (4) is made of non-power intake main journal (6) that fuses and non-power intake crank (7), and non-power intake crank (7) is provided with crank pin mounting hole (8); Right half bent axle (5) is made of the power intake main journal (9) that fuses, power intake crank (10) and crank pin (11), insert in the crank pin mounting hole (8) on the non-power intake crank (7) termination of crank pin (11), makes left half bent axle (4) and right half bent axle (5) be connected to become an integral shaft; Non-power intake main journal (6) is fixed on the main bearing (15,15 ') on crankcase both sides, and power intake main journal (9) is fixed on the main bearing (12,12 ') on crankcase both sides.