CN201650675U - Piston-valve-control air-inlet oil-free lubricating air compressor - Google Patents

Abstract

The utility model relates to a piston-valve-control air-inlet oil-free lubricating air compressor, which belongs to technical field of an air compressor. The air compressor comprises an air cylinder, an air-cylinder cover, a crank case, a piston and a connecting rod. The piston is fixedly connected with the connecting rod or is integrated with the connecting rod; the piston is provided with a sealing ring arranged into the air cylinder. Through adopting an offset air cylinder or an inclined piston or the offset air cylinder and the inclined piston, the flange surface of the sealing ring and the inner-hole wall surface of the air cylinder from an air-absorbing channel of the air compressor in the air-absorbing process, so as to obtain the effect of piston-control air suction. The air-inlet one-way valve of the traditional air compressor is removed, therefore, the structure is the number of simplified, easy-damage parts is reduced, the working reliability is improved, the mechanical noise source is reduced, and the clearance-volume reduced volume efficiency of the air compressor is increased; furthermore, the crank case used as an air-suction anechoic chamber, guide components and buffering parts arranged on the piston can buffer knocking intensity of the piston to the air cylinder, and can effectively reduce noise of the air compressor.

Description

Piston valve air suction non-lubricated air compressor

Technical field

The utility model belongs to the air compressor technical field, relates in particular to the Intaker controller of non-lubricated air compressor.

Background technique

Up to now, the lubricated air compressor of existing reciprocating-piston type oil-less all offers suction port bar none and is fitted with breather check valve, flows backwards from described suction port again when the compression procedure and regurgitates back ambient atmosphere to prevent to have entered in the air-breathing process air in the compressor operating chamber.As everyone knows, the suction port of traditional compressor can only be located on the cylinder head or be located on the piston, and the breather check valve that it adopts is usually by valve block, limiting board and fastening piece are formed, bring three problems thus: first problem is that the functional reliability of compressor is relatively poor, this is because the assembly of breather check valve is many and work under bad environment, no matter it is arranged on the cylinder head or is arranged on all can't be avoided being subjected to strong vibratory impulse on the piston, valve seat and limiting board are patted in valve block high frequency ground especially, be an easily damaged parts that very easily produces fatigue ruption, so the existence of breather check valve has reduced the functional reliability of compressor; The noise radiation that second problem is compressor is bigger, this is because the valve block of breather check valve can impact valve seat and limiting board at high speed when work, the vibration of its generation be directly transferred on the cylinder head or the body of piston on, be a mechanical noise source, so the existence of breather check valve has increased the noise of compressor; The volumetric efficiency that the 3rd problem is compressor is lower, in any case this is because breather check valve setting all must take a part of space, for fear of bumping, enough heavy holes must reserved on the piston or on cylinder head, cause bigger clearance volume thus, moreover the existence of suction port also can increase clearance volume, and the volumetric efficiency of the well-known big more compressor of clearance volume is low more, so the existence of suction port and breather check valve has reduced compressor volume efficient.

Summary of the invention

The problems referred to above at existing reciprocating-piston air compressor existence, the utility model provides a kind of piston valve air suction non-lubricated air compressor, one of purpose is effectively to improve the functional reliability of compressor, two of purpose is effectively to reduce the noise of compressor, and three of purpose is effectively to improve the volumetric efficiency of compressor.

The purpose of this utility model is achieved like this: piston valve air suction non-lubricated air compressor, comprise cylinder, cylinder head, crankcase, piston and connecting rod, described piston and connecting rod are fastenedly connected or piston and connecting rod are integral production, described cylinder head has the work bottom surface, described piston has top work surface, be fitted with seal ring on the piston and be positioned in together in the cylinder and cooperate with the motion of cylinder do, it is characterized in that: or adopt offset cylinder or employing loxosis piston or adopt offset cylinder simultaneously and the loxosis piston, make the outer fringe surface of seal ring such pose that cooperates be arranged with the inner hole wall mask of cylinder:

A) when the compressor air suction process, the endoporus wall of the outer fringe surface of described seal ring and cylinder occur coming to nothing slit and constitute the air intake passage of compressor with this, described air intake passage is connected crankcase with the active chamber of compressor;

B) when the compressor compresses process, the outer fringe surface of described seal ring is adjacent at the auxiliary following endoporus wall with cylinder of air pressure, and above-mentioned air intake passage is closed.

The work bottom surface of above-mentioned cylinder head and the top work surface of piston are plane or class plane.

When piston was in top dead center, the work bottom surface of above-mentioned cylinder head and the top work surface of piston were parallel to each other.

Above-mentioned crankcase is set to crankcase intake noise reduction chamber.

Indoor sound-absorbing material or the muffler material of being provided with of above-mentioned crankcase intake noise reduction.

The gas port of the connection of above-mentioned crankcase intake noise reduction chamber is provided with anti-air inlet and regurgitates one-way valve.

Above-mentioned cylinder and piston respectively have two, the V-shaped layout of described each cylinder, opposed type layout or be separately positioned on the two ends of motor.

Above-mentioned cylinder has non-circular cylinder hole.

Above-mentioned piston is provided with guiding elements.

Guiding elements between the endoporus wall of above-mentioned guiding elements and cylinder is provided with shock absorber.

The utility model drives seal ring reciprocating and oscillating motion in the cylinder hole of cylinder by piston, utilize come to nothing slit or the break-through breach that form between the outer fringe surface of seal ring and the cylinder bore wall to constitute so-called compressor air suction passage, variation along with the compressor operating process, piston can present different pendulum angles with cylinder-bore axis, make the actual internal area of air intake passage also change: when compressor was in air-breathing process, ozone passed through this air intake passage and is entered into by crankcase in the active chamber of compressor; When compressor is in compression procedure, with offset cylinder or with the loxosis piston piston is diminished with respect to the inclination amplitude of cylinder, air pressure in the active chamber impels the outside distending of seal ring and is adjacent to the cylinder bore wall simultaneously, thereby makes the sectional area of air intake passage diminish even complete closure.Undoubtedly, the utility model utilizes piston and the seal ring different operating pose with respect to cylinder, obtained to follow the valve control effect of compressor air suction process and compression procedure regulation and control air intake passage size, so can the abandoning tradition reciprocating-piston type oil-less breather check valve of lubricated air compressor, bring three benefits thus: one is the functional reliability that has improved compressor, another is to have reduced by a mechanical noise source, and also having one is the volumetric efficiency that has increased compressor; In addition, adopt crankcase can effectively reduce the induction noise of compressor as the intake noise reduction chamber, guiding elements being set on the piston, shock absorber is set between guiding elements and cylinder bore wall has alleviated the knock intensity of piston, so the technical solution of the utility model can effectively reduce the noise of compressor to cylinder.

Description of drawings

Fig. 1 is the generalized section of the utility model piston valve air suction non-lubricated air compressor when being in suction stroke;

Fig. 2 is that the K-K of the utility model piston valve air suction non-lubricated air compressor shown in Figure 1 is to sectional view;

Fig. 3 is the simplified schematic diagram that the utility model piston valve air suction non-lubricated air compressor adopts ellipse or the oval cylinder cylinder of class hole;

Fig. 4 is the generalized section of the utility model piston valve air suction non-lubricated air compressor when being in compression stroke;

Fig. 5 is the cross-sectional schematic diagram of mechanism of the utility model piston valve air suction non-lubricated air compressor when being in air-breathing process status;

Fig. 6 is the vertical profile schematic diagram of mechanism of corresponding the utility model piston valve air suction non-lubricated air compressor shown in Figure 5 when being in air-breathing process status;

Fig. 7 is the progress of work schematic representation of the utility model piston valve air suction non-lubricated air compressor when adopting cylinder not setover;

Progress of work sectional view when Fig. 8 is the utility model piston valve air suction non-lubricated air compressor employing cylinder offset;

Fig. 9 is the compressor schematic cross section that the utility model piston valve air suction non-lubricated air compressor piston only is provided with guiding elements and shock absorber;

Figure 10 is that the axle of the utility model piston valve air suction non-lubricated air compressor shown in Figure 9 is surveyed schematic representation.

Embodiment

With specific embodiment the utility model is further described below, referring to Fig. 1-10:

Piston valve air suction non-lubricated air compressor, comprise: cylinder 1, cylinder head 2, crankcase 3, bent axle, crank 4, piston 5 and connecting rod 6, described piston 5 is fastenedly connected with connecting rod 6 or piston 5 is integral production with connecting rod 6, be fitted with seal ring 7 on the piston 5 and be positioned in together in the cylinder 1 and cooperate with cylinder 1 do motion, described bent axle includes d-axis, crank 4 and crank pin 8, one end of described connecting rod 6 adopts bearing structure to be sleeved on rotationally on the crank pin 8, top work surface A by piston 5, the endoporus wall C fellowship of the work bottom surface B of cylinder head 2 and cylinder 1 encloses the active chamber 9 that is configured to compressor, also has various Sealings certainly, airway surface, component such as fastening piece and outlet valve also participate in enclosing the active chamber 9 of structure compressor; Need to prove, said top work surface A is the end face of the general reference piston 5 relative with the bottom surface of cylinder head 2 in the utility model, said work bottom surface B is the bottom surface of the general reference cylinder head 2 relative with the end face of piston 5, they can be the contoured surfaces of any single type or be the combination of polytype contoured surface, described contoured surface comprises the plane, the class plane, sphere, turning surface and other various curved surfaces, wherein top work surface A and work bottom surface B are the best with plane or class plane, so-called plane or class plane are meant that above-mentioned working surface is based on the plane and contain various hollows, chamfer surface, airway surface, the gas port surface, fastener surface, surface, heavy hole, less important plane or curved surfaces such as deep gouge surface and various defective convex-concave surfaces, in all for simplicity the utility model mentioned plane or class plane without exception with its body of work plane as representative, also be about to it and regard the plane as and treat; Need to prove that also piston 5 both can be that the one-piece piston (not shown) also can be a split type piston (as shown in the figure), wherein split type piston can be fastenedly connected on the piston only by the piston cover plate and by fastening piece 5a and constitute; There are two big maximum differences in the utility model with prior art: 1) the utility model utilizes piston 5 and seal ring 7 to cooperate the air-breathing process of controlling compressor with the different poses of cylinder 1, the outer fringe surface 7a that specifically is exactly special arrangements seal ring 7 comes to nothing the slit to constitute the air intake passage 10 (referring to Fig. 1 and Fig. 2) of compressor with respect to the endoporus wall C formation of cylinder 1, the lubricated air compressor of existing reciprocating-piston type oil-less then is to avoid occurring coming to nothing between seal ring and the cylinder bore wall slit or break-through breach by fair means or foul, and still none example is to cause the above-mentioned slit and its air intake passage as compressor come layout of coming to nothing consciously up to now; 2) breather check valve that the utility model can abandoning tradition, so simplify the structure, reduced easily damaged parts, improved the functional reliability of compressor, the lubricated air compressor of existing reciprocating-piston type oil-less then can't be abandoned structures such as breather check valve and suction port, has stayed therefore also that reliability is low, noise big and not high many defect of volumetric efficiency and hidden danger; Need to prove, to be piston 5 and seal ring 7 cooperate the breach that comes to nothing (or title break-through breach) because of what have with cylinder 1 that swing tilts to occur with respect to the endoporus wall C of cylinder 1 in the described slit of coming to nothing, the outer fringe surface 7a of described seal ring 7 is the set of the outer surface that refers to that the seal ring 7 and the endoporus wall C of cylinder 1 show up mutually, and described pose then is the occupy-place position, space of component and the space general name towards attitude; Obviously, difference along with the compressor operating process, piston 5 and seal ring 7 can present different pendulum angles with respect to cylinder-bore axis O1, therefore the actual internal area of air intake passage 10 also can constantly change, when compressor was in air-breathing process, ozone passed through air intake passage 10 and enters within the active chamber 9 of compressor (as shown in Figure 1); And when compressor is in compression procedure, piston 5 and seal ring 7 progressively diminish with respect to the amplitude of fluctuation of cylinder-bore axis O1, gas pressures in the while compressor operating chamber 9 force seal ring 7 outside distendings and are adjacent to the endoporus wall C of cylinder 1, this moment, the sectional area of air intake passage 10 diminished even fully closed (as shown in Figure 4), see through the progress of work schematic representation of the utility model compressor that Fig. 7 and Fig. 8 provide, can more clearly find out the evolution process of above-mentioned process, wherein Fig. 7 (a) and Fig. 8 (a) are pairing is the situation of piston 5 when being in top dead center, and this moment, the volume of active chamber 9 of compressor was a minimum state; Fig. 7 (b) and Fig. 8 (b) are corresponding then is the situation of compressor when being in air-breathing process, and this moment, air intake passage 10 was in the state of opening; Fig. 7 (c) and Fig. 8 (c) are corresponding is the situation of piston 5 when being in lower dead center, and this moment, the volume of active chamber 9 of compressor was a maximum rating; Fig. 7 (d) and Fig. 8 (d) are corresponding is the situation of compressor when being in compression and exhaust process, and the air intake passage 10 of this moment is in the long-pending or closed fully state of small bore; Special needs to be pointed out is, said air-breathing process of the utility model and compression procedure and traditional suction stroke and compression stroke are different, traditional suction stroke is meant that piston moves to the course that lower dead center (corresponding compressor operating chamber is from the minimum volume to the maximum volume) piston is passed by from top dead center, compression stroke is meant that piston moves to the course that top dead center (corresponding compressor operating chamber is from the maximum volume to the minimum volume) piston is passed by from lower dead center, they are essentially geometric sense, irrelevant with the running state of compressor, and the air-breathing process in the utility model is meant that ambient atmosphere flows to the process of the active chamber 9 of compressor from crankcase 3 via air intake passage 10, it is a dynamic process, not only relevant but also relevant with operating conditions with geometric parameter, such as a kind of situation wherein is that piston 5 is covered suction stroke and crossed lower dead center and set out to top dead center, but air intake passage 10 as do not close and ambient atmosphere still flows to active chamber 9 under the speed action of inertia, then look it and also be in the middle of the air-breathing process, compression procedure in like manner of the present utility model is meant the process that ambient atmosphere stops that active chamber 9 to compressor flows to and piston 5 continues motion and forces the volume of active chamber 9 to diminish; It is to be noted, the cylinder 1 in the utility model and the number of piston 5 can respectively have one and also can respectively have a plurality of, cylinder-bore axis O1 can be that vertical is arranged, horizontal arrangement or be in tilted layout, corresponding respectively compressor is vertical layout, horizontal layout and tilting layout, especially when the quantity of cylinder 1 and piston 5 all respectively has two, these two cylinder arrangement can also be become the V-type layout, opposed type layout or simply two cylinders are separately positioned on the two ends (not shown) of motor, so-called V-type layout is meant that the axis of two cylinders has certain included angle (their axis can intersect also can be non-intersect), so-called opposed layout is meant that two cylinders are 180 ° splits both sides at the crankshaft rotating axis (axis of two cylinders can coaxial setting also can shift to install in parallel to each other), the two ends that what is called splits at motor is to refer to that motor adopts axial two-way output and respectively disposes a cylinder and a piston in its two axial ends simultaneously; In sum, utilize piston 5 and seal ring 7 different operating pose with respect to cylinder 1, can regulate and control the actual internal area of the air intake passage 10 of compressor air suction process and compression procedure, in other words the utility model can the abandoning tradition reciprocating-piston type oil-less breather check valve of lubricated air compressor, so there is not the breather check valve problem of damage easily in it; In order to obtain better piston valve control air inlet effect, can select one of following structural measure to be implemented:

A) adopt offset cylinder, adopting offset cylinder is in order to obtain the actual internal area of big as far as possible air intake passage 10 when the compressor air suction process, simultaneously also in order to dwindle or close the actual internal area of air intake passage 10 when the compressor compresses process as soon as possible; The way of offset cylinder is that the cylinder-bore axis O1 of cylinder 1 is implemented the biasing layout with respect to the spin axis O2 of bent axle, that is cylinder-bore axis O1 and eccentric distance e of spin axis O2 existence, the numerical value of described eccentric distance e both can also can equal radius of crankshaft r less than radius of crankshaft r can also be greater than radius of crankshaft r, the turning radius that the crank pin axis O3 that said here radius of crankshaft r is a crank pin 8 rotates around the spin axis O2 of bent axle; It must be noted that, the offset position of best cylinder 1 should satisfy such condition: promptly when compressor is in compression stroke and crank line and cylinder-bore axis O1 and is in plumbness, axial direction along the spin axis O2 of bent axle is observed, described cylinder-bore axis O1 and crank pin axis O3 are in the same side other (this just situation that Fig. 4 provides) with respect to spin axis O2, here said crank line is the pedal line that refers between crank pin axis O3 and the spin axis O2, so-called crank 4 is to refer to the d-axis part (part that promptly comprises spin axis O2) of bent axle and linkage structure or the transition structure between the crank pin 8, described crank 4 can with equilibrium block 4a integral production, can certainly be with crank 4 with equilibrium block 4a and crank pin 8 integral manufacturings; It is easy to show that, offset position according to the cylinder 1 of above-mentioned the best carries out layout, can when the compressor air suction process, obtain bigger piston 5 and seal ring 7 swing magnitude of inclination with respect to cylinder-bore axis O1, the outer fringe surface 7a of seal ring 7 and the endoporus wall C of cylinder 1 have the bigger slit of coming to nothing at this moment, that is can obtain the actual internal area of bigger air intake passage 10, its result is favourable to the air-breathing process of compressor, on the other hand, when compressor carries out compression procedure, piston 5 and seal ring 7 can obviously reduce with respect to the swing inclination amplitude of cylinder 1, in other words the outer fringe surface 7a of seal ring 7 is less with respect to the break-through breach that comes to nothing of the endoporus wall C of cylinder 1, and piston 5 and the motion of seal ring 7 in cylinder 1 approach straight line motion more, so favourable to the sealing of compressor compresses process;

B) adopt the loxosis piston, the purpose that adopts the loxosis piston is to dwindle during in compression procedure for the actual internal area that helps air intake passage 10 opens greatlyyer when the air-breathing process as far as possible or close equally; Be defined as about the loxosis piston in the utility model: at first piston 5 is positioned at top dead center position, observe then, if the top work surface A of piston 5 is plane or class plane, and its top work surface A and cylinder-bore axis O1 intersect but out of plumb, then claim this piston 5 to be the loxosis piston, if the top work surface A of piston 5 is other contoured surfaces, if its working reference plane P and cylinder-bore axis O1 intersect but out of plumb, then also claim this piston 5 to be the loxosis piston, wherein the working reference plane P of piston 5 determines like this, at first allow piston 5 be in top dead center, crossing cylinder-bore axis O1 then does the plane vertical with crankshaft rotating axes O 2 and dissects the cross section that obtains compressor, can find that on the cross section endoporus wall C of cylinder 1 and the work bottom surface B of cylinder head 2 have two joints, then on piston 5, find and immediate two some S points of above-mentioned joint and T point, cross line that S point and T order at last and make to be parallel to the working reference plane P that the plane of spin axis O2 is piston 5, can be with reference to Fig. 7 (a) and Fig. 8 (a); Need to prove when the top work surface A of piston 5 is plane or class plane, do not adopt the method for above-mentioned working reference plane P to remove to judge whether to be the loxosis piston; What Fig. 7 provided is the progress of work schematic representation that adopts the compressor of loxosis piston under the situation that cylinder 1 is not setovered, as seen from the figure because piston 5 loxosis in advance, piston 5 was with respect to the inclination of cylinder 1 when piston 5 partly was transferred to air-breathing process with respect to the inclination of cylinder 1 when in fact being equivalent to compression procedure, in other words under the influence of piston 5 work poses, the outer fringe surface 7a of seal ring 7 has the bigger slit and have the littler slit of coming to nothing during in compression procedure of coming to nothing when the air-breathing process with respect to the endoporus wall C of cylinder 1, and the unlatching sectional area of air intake passage 10 can obtain bigger when air-breathing process and can become littler during in compression procedure in other words;

C) adopt offset cylinder and loxosis piston simultaneously, what Fig. 8 provided is the progress of work schematic representation that adopts the compressor of loxosis piston under the situation of offset cylinder at cylinder 1 just, obvious this allocation plan is very favourable to the sealing of the air-breathing and compression procedure of compressor air suction process, its principle is with preceding identical, and narration is omitted.

In order to reduce clearance volume as far as possible to improve the volumetric efficiency of compressor, can allow the work bottom surface B and the pistons work end face A of cylinder head 2 have same or analogous contoured surface, but must keep certain matching gap between them in case piston 5 when running to top dead center and cylinder head 2 bump; Especially, when the top work surface A of piston 5 adopts plane or class plane, the work bottom surface B of cylinder head 2 also can be made plane or class plane, and when making piston 5 be in top dead center, top work surface A and work bottom surface B are arranged in parallel, be more convenient for like this making, install and detect, can control the clearance volume of compressor simultaneously better.

In order to reduce the noise of compressor, can crankcase 3 be closed and form crankcase intake noise reduction chamber 12 (referring to Fig. 6) with crankcase cover 11, described crankcase cover 11 can be that a whole lid also can be formed by some tegillum spellings, crankcase intake noise reduction chamber 12 can be that a big volume space (referring to Fig. 5 and Fig. 6) also can be formed (as Fig. 1 by several little volume spaces or even long-channel space spelling, Fig. 4, Fig. 9 and shown in Figure 10), crankcase intake noise reduction chamber 12 allows it to be connected with gas port 13 grades and allows it to have certain movement clearance, seal clearance and various foozle, assembly error and the slit that distortion caused, described gas port 13 can be located at that (as shown in Figure 1 and Figure 4) also can be located at (as shown in Figure 6) on the crankcase cover on the casing of crankcase 3, and it also can be several that the quantity of gas port 13 can be one; Sound-absorbing material or muffler material 12a can be set in crankcase intake noise reduction chamber 12, so that can in wideer frequency range, eliminate or weaken the charge pulsation noise, described sound-absorbing material or muffler material 12a can adopt various sound-absorbing material used in the prior art and muffler material, and sound-absorbing material or muffler material 12a can also use as air filtering core especially; For the fresh airs that prevent to enter in the crankcase intake noise reduction chamber 12 are regurgitated back extraneous atmosphere via gas port 13 places again, can gas port 13 places therein be provided with and prevent that air inlet regurgitates one-way valve 13a; Obviously, crankcase intake noise reduction chamber 12 is communicated with the active chamber 9 of compressor by air intake passage 10, because the volume of crankcase intake noise reduction chamber 12 is bigger, therefore can effectively weaken the induction noise of compressor, crankcase intake noise reduction chamber 12 is also with piston 5, connecting rod 6, crank pin 8 even equilibrium block 4a sealing (referring to Fig. 4 to Fig. 6) within it in addition, imprisons within crankcase intake noise reduction chamber 12 so the noise that air produces is bounced in the mechanical noise that can effectively these parts be sent and they.

In order to reduce because of piston 5 and the back too quickly impact of endoporus wall C generation of seal ring 7 generation wearing and tearing to cylinder 1, the cylinder hole of cylinder 1 can be made non-circular ellipse or class ellipse (as shown in Figure 3), even the cylinder hole of cylinder 1 can also be made non-circular rectangle, trapezoidal and cylinder hole shape (not shown) that other are special-shaped, correspondingly piston 5 and seal ring 7 also should be made the non-circular shape suitable with the cylinder hole certainly; Be not difficult to find, piston 5 or seal ring 7 (allow because of wearing and tearing with have point of contact M and N of the endoporus wall C of cylinder 1 on the direction of or almost parallel parallel with the spin axis O2 of bent axle, distortion and manufacturing and assembling etc. cause comes to nothing and does not contact), obviously, not only there are the axially reciprocating with respect to cylinder 1 in piston 5 and seal ring 7, but also existence is around the oscillating motion of M point and N point line, when compressor operating after certain time limit, the outer fringe surface of piston 5 or seal ring 7 M point and N point or near it position wearing and tearing appear unavoidably, and cause them between the endoporus wall C of these positions and cylinder 1, the gap to occur thus, undoubtedly, when adopting ellipse or the oval-shaped cylinder of class hole, when piston 5 and seal ring 7, M point and N point drop on two-end part or near its position of their long axis direction, compare with the cylinder hole of circle, occur under the prerequisite in identical gap at M point and N point, the oval-shaped cylinder of ellipse or class hole can retrain the swing of control piston 5 and seal ring 7 better and rock, this is because of ellipse or the oval-shaped cylinder of class hole goes to tackle piston 5 with the less position of radius of curvature just and waving of seal ring 7 rocked, and the radius of curvature of ordering at M point and N in the circular cylinder hole of identical stroke and same cylinder discharge capacity is relatively large, in other words waving of piston 5 of working in circular cylinder hole and seal ring 7 rocked wearing clearance responsively more, that is to say that its mechanical slapping noise is bigger; It is to be noted, the inner hole surface C of the cylinder 1 in the utility model is the cylinder shape, random position on cylinder 1 is to go to cut perpendicular to the plane of cylinder-bore axis O1 in other words, the cylinder pass line that is obtained is consistent (allowing to exist because of making and caused size error of various distortion and morpheme error), when being circle, the molded lines in above-mentioned cylinder hole is so-called circular cylinder hole, when being ellipse, the molded lines in above-mentioned cylinder hole is oval cylinder hole, when being class ellipticity, above-mentioned cylinder pass line then is the oval cylinder of class hole especially, here the oval cylinder of said class hole comprises by the simple harmonic quantity function, various spline functions, the cylinder pass line that high power function or multi-section circular arc are constituted, molded lines when the cylinder hole is a rectangle in addition, during trapezoidal or other different forms, then Dui Ying cylinder hole is respectively rectangle cylinder hole, trapezoidal cylinder hole and profiled cylinder hole.

In order to alleviate the intensity of bouncing of 5 pairs of cylinders 1 of piston, guiding elements 14 can be set on piston 5, described guiding elements 14 is the projection with respect to the outer surface protuberance of piston 5, such as with respect to the top work surface A of piston 5 protuberance or with respect to this external surface protuberance (as shown in Figure 1 and Figure 4) of piston 5, the quantity of guiding elements 14 has one or several, and the position of its protuberance must not interfere with the endoporus wall C of cylinder 1; The effect of guiding elements 14 is: when the part outer fringe surface that causes piston 5 or seal ring 7 with respect to cylinder-bore axis O1 run-off the straight swing when piston 5 and seal ring 7 occurs coming to nothing with the endoporus wall C of cylinder 1 (air intake passage 10 is in opening state at this moment), guiding elements 14 still keeps in touch or remains with small motion matching gap with the endoporus wall C of cylinder 1, like this when piston 5 and seal ring 7 just more smooth-going in backswing the time, internally the impact of wall surface of the hole C is just little, the working life that can not only reduce noise and can also improve seal ring 7; It is to be noted, guiding elements 14 both can form on the piston cover plate of piston 5 and also can form on the piston only of piston 5, when guiding elements 14 during with respect to the top work surface A of piston 5 protuberance, bump for fear of itself and cylinder head 2, collision avoidance hole 2a can be set on cylinder head 2, described collision avoidance hole 2a can be provided with separately also and can be wholely set with the exhaust port of compressor, guide 14 both can adopt metallic material also can adopt nonmetallic material even can also adopt composite material in addition, certainly guiding elements 14 can also be made split-type structural, such as will guiding elements 14 being fastened to again on the piston 5 after making separately, cover outside guiding elements 14 can also adopt on the basis of metal body in addition or outside wrap and variously have the nonmetallic material of self-enrichment performance and constitute; Need to prove, guiding elements 14 can be provided with along any orientation of circumference of the outer rim of piston 5, even on the orientation that M point and N are ordered, also can be provided with, if the outer surface of guiding elements 14 has spherical in addition or dolioform shape then guide effect better; Especially, between the endoporus wall C of guiding elements 14 and cylinder 1, shock absorber 15 can also be set, shock absorber 15 can adopt existing variously have certain flexible material and makes, wherein non-lubricated air compressor is employed to comprise that the various self-enrichment materials of teflon and filling teflon are the best to have now, further, shock absorber 15 can also be the part of seal ring 7.

In sum, the utility model can be abandoned traditional breather check valve of the lubricated air compressor of reciprocating-piston type oil-less, so can improve the functional reliability of compressor, in addition crankcase 3 can effectively be reduced the induction noise of compressor as crankcase intake noise reduction chamber 12, guiding elements 14 is set on piston 5 and the intensity of knocking that shock absorber 15 can be alleviated 5 pairs of cylinders 1 of piston is set, so can reduce the noise of compressor.In fact, adopt the utility model piston valve control air inlet can also effectively shorten the length of connecting rod 6, can make compressor compact more.

The foregoing description only is the some preferred embodiments of the utility model, is not to limit protection domain of the present utility model according to this, so: all equivalences of doing according to structure of the present utility model, shape, principle change, and all should be covered by within the protection domain of the present utility model.

Claims (10)

1. piston valve air suction non-lubricated air compressor, comprise cylinder, cylinder head, crankcase, piston and connecting rod, described piston and connecting rod are fastenedly connected or piston and connecting rod are integral production, described cylinder head has the work bottom surface, described piston has top work surface, be fitted with seal ring on the piston and be positioned in together in the cylinder and cooperate with the motion of cylinder do, it is characterized in that: adopt offset cylinder or employing loxosis piston or adopt offset cylinder simultaneously and the loxosis piston, make the outer fringe surface of seal ring such pose that cooperates be arranged with the inner hole wall mask of cylinder:

A) when the compressor air suction process, the endoporus wall of the outer fringe surface of described seal ring and cylinder occur coming to nothing slit and constitute the air intake passage of compressor with this, described air intake passage is connected crankcase with the active chamber of compressor;

B) when the compressor compresses process, the outer fringe surface of described seal ring is adjacent at the auxiliary following endoporus wall with cylinder of air pressure, and described air intake passage is closed.

2. piston valve air suction non-lubricated air compressor according to claim 1 is characterized in that: the work bottom surface of described cylinder head and the top work surface of described piston are plane or class plane.

3. piston valve air suction non-lubricated air compressor according to claim 2 is characterized in that: when piston was in top dead center, the work bottom surface of described cylinder head and the top work surface of described piston were parallel to each other.

4. piston valve air suction non-lubricated air compressor according to claim 3 is characterized in that: described crankcase is set to crankcase intake noise reduction chamber.

5. piston valve air suction non-lubricated air compressor according to claim 4 is characterized in that: indoor sound-absorbing material or the muffler material of being provided with of described crankcase intake noise reduction.

6. piston valve air suction non-lubricated air compressor according to claim 5 is characterized in that: the gas port that is communicated with crankcase intake noise reduction chamber is provided with anti-air inlet and regurgitates one-way valve.

7. according to each described piston valve air suction non-lubricated air compressor in the claim 1 to 6, it is characterized in that: described cylinder and piston respectively have two, the V-shaped layout of described each cylinder, opposed type layout or be separately positioned on the two ends of motor.

8. according to each described piston valve air suction non-lubricated air compressor in the claim 1 to 6, it is characterized in that: described cylinder has non-circular cylinder hole.

9. according to each described piston valve air suction non-lubricated air compressor in the claim 1 to 6, it is characterized in that: described piston is provided with guiding elements.

10. piston valve air suction non-lubricated air compressor according to claim 9 is characterized in that: the guiding elements between the endoporus wall of described guiding elements and cylinder is provided with shock absorber.

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