CN209621561U

CN209621561U - Closed crankcase oil-free air compressor with dual-cooled system

Info

Publication number: CN209621561U
Application number: CN201920420311.1U
Authority: CN
Inventors: 杨晶; 周光富; 张冰洁; 王长森
Original assignee: Tianjin Linkstrong Technology Development Co ltd
Current assignee: Tianjin Linkstrong Technology Development Co ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2019-11-12
Anticipated expiration: 2029-03-29

Abstract

The utility model relates to a kind of closed crankcase oil-free air compressor with dual-cooled system, including crankcase, valve plate, cylinder cap, piston rod part, driving motor, fan cover assembly, centrifugal fan；The valve plate is set at the top of the crankcase, and the cylinder cap is set to the valve plate top；The fan cover assembly and the centrifugal fan constitute external cooling, and the piston rod part, crankcase collectively form internal cooling.The utility model is able to solve existing open oil-free air compressor easily causes piston and cylinder to lead to the problem of the working life and stability for pulling, reducing compressor because of the entrance of the impurity such as extraneous dust granule, and it is cooling that inside and outside dual is arranged, the operating temperature of effective control oil-free air compressor, ensures the safe and stable operation of air compressor.

Description

Closed crankcase oil-free air compressor with dual-cooled system

Technical field

The utility model relates to air compressor technical fields, and in particular to a kind of closed song with dual-cooled system Axle box oil-free air compressor.

Background technique

Air compressor is one kind to compressed gas, provides the equipment of gas source power, and the dynamic mechanical energy of original is converted into Air at runtime, can be compressed in air accumulator by the device of gas pressure energy, air compressor.It is same to have oil lubricating compressor phase Than, oilless (oil free) compressor due to the cooling and lubrication of not no lubricating oil, piston ring is in high temperature, high pressure, top load, oil-free lubrication Bad working environments, the rate of wear quickly, influence the service life and reliability of operation of air compressor machine.In order to reduce piston during exercise The high-temperature of generation, at this stage, oil-free air compressor are usually that open crankcase structure is still opened by the way of The crankcase structure for putting formula can cause piston to pull, wear with cylinder generation because of the entrance of the impurity such as extraneous dust granule, drop The working life of low compressor, increases maintenance cost.Furthermore the valve of oil-free air compressor inlet and outlet at this stage is integrated in valve At plate, for the structure because inlet and outlet valve is arranged on the valve plate of limited area, air inlet section product is smaller, resistance is big and eliminates the noise Chamber limited volume causes intake resistance height, Mach number big, so that intake efficiency is lower and noise is high.

Utility model content

In order to solve the problems existing in the prior art, the utility model provides a kind of closed crankshaft with dual-cooled system On the one hand case oil-free air compressor not only solves existing open oil-free air compressor easily because of impurity such as extraneous dust granules Entrance and cause piston and cylinder generation to pull, wear, reduce the working life and stability of compressor, and overcome into Gas efficiency is lower, the big problem of noise；Still further aspect, setting inside and outside dual is cooling, effectively controls oil-free air compressor Operating temperature, the problem of avoiding high temperature lower piston ring rapid wear, ensure the safe and stable operation of air compressor.

In order to achieve the above purposes, the technical solution adopted by the utility model is:

A kind of closed crankcase oil-free air compressor with dual-cooled system, including crankcase, further include valve plate, Cylinder cap, piston rod part, driving motor, fan cover assembly, centrifugal fan；The valve plate is set at the top of the crankcase, The cylinder cap is set to the valve plate top；The crankcase is fixedly connected with the valve plate, cylinder cap respectively and is formed closed Crankcase structure；Piston rod part is equipped in the crankcase；The fan cover assembly, crankcase, driving motor successively connect It connects, the fan cover assembly and the centrifugal fan constitute external cooling, and the piston rod part, crankcase collectively form interior Portion is cooling.

In any of the above-described scheme preferably, the fan cover assembly includes fan guard, lid, connecting plate, air mistake Filter；The top of the fan guard is fixedly connected with the lid, and the bottom of the fan guard passes through connecting plate and the crankshaft The outer wall bottom of case is fixedly connected, and the lid and fan guard, connecting plate are coated on the crankshaft box shell back to driving motor Outer wall on and form cavity；The fan cover assembly is fixedly connected with the crankshaft box outer wall, the air filter cover Top passes through and puts in cavity.

In any of the above-described scheme preferably, the piston rod part includes piston, cylinder, eccentric disc, bearing, company Bar, piston pin；The piston be hollow barrel-like structure, the piston it is opening down, be provided on the piston piston pin peace Fill hole；The piston is located in institute's cylinder and cooperates with it, and the top of the piston is equipped with intake valve, the cylinder fixed setting Top in the crankcase.

In any of the above-described scheme preferably, eccentric mounting hole is offered on the eccentric disc；The driving motor Flange be fixedly connected with the outer wall of the crankcase, on the driving motor output shaft in the crankcase and the eccentric disc Mounting hole is fixedly connected, and is extend out in cavity；The eccentric disc is located in the big end end and is realized by bearing Rotation connection, the small end of connecting rod end are formed by bearing and piston pin and are rotatablely connected, and the piston pin is fixedly connected with the piston.

In any of the above-described scheme preferably, the centrifugation wind is socketed in the driving motor output shaft in the cavity Fan, in the cavity, position corresponding with the centrifugal fan blade opens up on the fan guard for the centrifugal fan position There is flow-guiding channel, the flow-guiding channel is the circular passage being placed equidistant with from inside to outside.

In any of the above-described scheme preferably, the outer wall of the crankcase is equipped with the radiating fin of multiple equidistantly distributeds The water conservancy diversion direction of piece, the radiating fin is parallel with fan cover assembly outer direction；The cooling that the centrifugal fan generates Air-flow realizes the external cooling of air compressor through the fan cover assembly and radiating fin guiding.

In any of the above-described scheme preferably, corresponding with cylinder on the crankcase side wall far from driving motor Position is equipped with air inlet, the center line of the air inlet and the central axis of cylinder, between the crankcase and the cylinder Equipped with inlet channel, one end of the air filter is injected in air inlet, and the other end of the air filter is through described Lid, external cooling air-flow enter circulating cooling in crankcase through air filter and air inlet, then through on the piston into Air valve flows into cylinder interior, before being compressed, realizes cooling to compressor inside.

In any of the above-described scheme preferably, the air filter includes fixed lid, connecting shaft, is set in connecting shaft On filter core, mounting rack is arranged in position corresponding with air inlet on the lid, and the filter core is located in the mounting rack, institute The fixed lid one end far from crankcase that is coated on mounting rack is stated, the fixed lid connects by the way that one end of screw and connecting shaft is fixed It connects, the other end of the connecting shaft passes through mounting rack and injects in the air inlet.

In any of the above-described scheme preferably, the connecting shaft is hollow tubular structures, and the connecting shaft inside filter core On offer multiple air inlets.

The utility model also provides a kind of cooling of closed crankcase oil-free air compressor with dual-cooled system Method, suitable for the closed crankcase oil-free air compressor described in any of the above-described scheme with dual-cooled system, packet Include following steps:

Step 1, outside is cooling, driving motor rotation, and the output shaft of driving motor drives the centrifugal fan rotation in fan guard Turn, centrifugal fan is not required to power supply and is powered, and the cooling air-flow of generation is oriented to air pressure by fan guard, cover board by centrifugal fan The water conservancy diversion direction in the direction of contracting machine high-temperature area, radiating fin is parallel with fan cover assembly outer direction, cooperates fan guard Component makes cooling air-flow be oriented to radiating fin, and the heat that radiating fin generates is taken away crankcase, keeps cylinder cap gentle by cooling air-flow Cylinder region is radiated, and is realized to the external cooling of air compressor；

Step 2, inside is cooling, and extraneous cooling air-flow passes through after the filter core on air filter is filtered dust Air inlet enters in connecting shaft, is then entered in closed crankcase by air inlet again, by between crankcase and cylinder Air intake duct flows downward, and driving motor drives eccentric disc rotation, so that connecting rod band piston is done reciprocal operation in cylinder, works as piston When running down, the inlet open being set on piston sucks extraneous cooling air-flow, when air-flow passes through cylinder, connecting rod, bias When disk, driving motor output shaft component, these components are cooled down, are then entered in cylinder by intake valve again；On piston When shifting, piston carries out compression to the air-flow in cylinder and is discharged by the exhaust valve on valve plate, realizes in air compressor Portion is cooling；Step 1 and step 2 are realized cooling to the inside and outside dual of air compressor simultaneously.

Compared with prior art, the closed crankcase oil-free air pressure provided by the utility model with dual-cooled system Contracting machine has the advantages that

1, by being enclosed construction by crankcase designs, the components such as piston, cylinder, bearing, connecting rod, eccentric wheel are sealed Close in crankcase, avoid the impurity particles such as extraneous dust entrance caused by between piston and cylinder relative motion produced Raw pulls, wears, and extends the service life of the components such as piston, cylinder, to effectively raise the work of compressor entirety Make stability and service life

2, dual-cooled design can effectively control the operating temperature of oil-free air compressor, solve because crankcase seals It closes and the bad problem that causes to radiate, extends the service life of piston rod part；By the way that air is arranged in the outside of crankcase Filter can suck cool ambient air in crankcase, and the cold air of sucking is first recycled in inside, to cylinder and piston connecting rod unit After part etc. carries out cooling, then entered in cylinder by the intake valve on piston and compressed, realizes self-cooling function inside crankcase；

3, external centrifugal fan realizes that external forced is air-cooled, and the centrifugal fan coaxial with driving motor is arranged outside crankcase Blade, and the fan guard and lid that crankcase outer profile is enveloped, when fan work, cooling air is through fan guard water conservancy diversion Afterwards, flow direction is parallel with radiating fin direction, avoids around arbitrarily diffusion, while optimizing the distribution of cooling air-flow, It is cooling to form external forced, it is ensured that cooling air carries out crankcase (high-temperature area especially near cylinder cap and cylinder) efficient Ground is cooling.

4, air filter design is in the cavity that fan guard, lid and crankcase are formed, and compact-sized design is not only Be conducive to air compressor small form factor requirements, and prefilter is carried out to outside air, prevents from carrying dust entrance in air Piston, cylinder are caused to pull and be worn in crankcase, plays the role of protecting compressor.

5, by crankcase closure designs, intake valve is individually arranged on piston, can increase exponentially air inlet section product, Intake resistance and air inlet Mach number are reduced, not only improves intake efficiency, but also the big volume that closed crankcase is formed is eliminated the noise Chamber greatly reduces the noise generated when compressor operation.

Detailed description of the invention

Fig. 1 is the one excellent of the closed crankcase oil-free air compressor provided by the utility model with dual-cooled system Select the overall structure diagram of embodiment；

Fig. 2 is the cross-sectional view of embodiment illustrated in fig. 1；

Fig. 3 is the 3-D view of eccentric wheel in embodiment illustrated in fig. 1；

Fig. 4 is the main view of embodiment illustrated in fig. 3.

Explanation: 1, crankcase is marked in figure；2, mounting rack；3, driving motor；4, cylinder cap；5, fan guard；6, flow-guiding channel； 7, output shaft；8, connecting rod；9, air inlet；10, intake valve；11, exhaust valve；12, connecting shaft；13, centrifugal fan；14, filter core； 15, connecting plate；16, lid；17, fixed lid；18, mounting hole；19, cylinder；20, valve plate；21, eccentric disc；22, radiating fin.

Specific embodiment

In order to be further understood that the utility model content of the utility model, elaborated below in conjunction with specific embodiment The utility model.

As shown in Figs 1-4, it is compressed according to the closed crankcase oil-free air with dual-cooled system of the utility model One embodiment of machine, including crankcase 1 further include valve plate 20, cylinder cap 4, piston rod part, driving motor 3, fan guard group Part, centrifugal fan 13；The valve plate 20 is set to 1 top of crankcase, and the cylinder cap 4 is set to 20 top of valve plate； The crankcase 1 is fixedly connected to form closed 1 structure of crankcase with the valve plate 20, cylinder cap 4；It is equipped in the crankcase 1 The piston rod part；The fan cover assembly, crankcase 1, driving motor 3 are sequentially connected, the fan cover assembly and institute It states centrifugal fan 13 and constitutes external cooling, the piston rod part, crankcase 1 collectively form internal cooling.

The fan cover assembly includes fan guard 5, lid 16, connecting plate 15, air filter；The top of the fan guard 5 Portion is fixedly connected with the lid 16, and the bottom of the fan guard 5 is solid by the outer wall bottom of connecting plate 15 and the crankcase 1 Fixed connection, the lid 16 and fan guard 5, connecting plate 15 are coated on 1 shell of crankcase back on the outer wall of driving motor 3 And form cavity；The fan cover assembly is fixedly connected with 1 outer wall of crankcase, is passed through at the top of the air filter cover And it puts in cavity.

The piston rod part includes piston, cylinder 19, eccentric disc 21, bearing, connecting rod 8, piston pin；The piston is Hollow barrel-like structure, the piston it is opening down, piston pin mounting hole 18 is provided on the piston；The piston is located at institute Cooperate in cylinder 19 and with it, the top of the piston is equipped with intake valve 10, and the cylinder 19 is fixed at the crankcase 1 Interior top.The material of cylinder 19 is brass, and piston is made of aluminum material；

Eccentric mounting hole 18 is offered on the eccentric disc 21；The number of mounting hole 18 is two, the driving motor 3 Flange be fixedly connected with the outer wall of the crankcase 1, and the output shaft 7 of driving motor 3 is through the crankcase 1 and extending out to In cavity, 3 output shaft 7 of driving motor in the crankcase 1 is fixedly connected with the mounting hole 18 on the eccentric disc 21；It is described Eccentric disc 21 is located in 8 stub end of connecting rod and realizes rotation connection by bearing, the small head end of the connecting rod 8 by bearing and Piston pin forms rotation connection, and the piston pin is fixedly connected with the piston.

The centrifugal fan 13 is socketed on 3 output shaft 7 of driving motor in the cavity, the centrifugal fan 13 is located at institute It states in cavity, position corresponding with 13 blade of centrifugal fan offers flow-guiding channel 6 on the fan guard 5, described to lead Circulation road 6 is the circular passage being placed equidistant with from inside to outside.Air enters in cavity through flow-guiding channel 6, then through air filtration Device enters in crankcase 1.

The outer wall of the crankcase 1 is equipped with the radiating fin 22 of multiple equidistantly distributeds, and the radiating fin 22 is led It is parallel with fan cover assembly outer direction to flow direction；It is i.e. parallel with fan guard, the outer direction of lid, the centrifugal fan 13 cooling air-flows generated are oriented to through the fan guard, lid and the radiating fin realizes the external cooling of air compressor.

Far from driving motor 3 the crankcase side wall on position corresponding with cylinder 19 be equipped with air inlet, it is described into The central axis of the center line of port and cylinder 19 is equipped with inlet channel between the crankcase 1 and the cylinder 19, i.e., into There is gap to form inlet channel between 19 axial direction of port and cylinder, one end of the air filter is injected in air inlet, The other end of the air filter runs through the lid 16, and external cooling air-flow enters crankshaft through air filter and air inlet Circulating cooling in case 1, then cylinder interior is flowed into through the intake valve on the piston, before being compressed, realize to compressor inside It is cooling.

The air filter includes fixed lid 17, connecting shaft 12, the filter core 14 being set in connecting shaft 12, the lid Mounting rack 2 is arranged in position corresponding with air inlet on 16, and the filter core 14 is located in the mounting rack 2, the fixed lid 17 It is coated on the one end of mounting rack 2 far from crankcase 1, fixed lid 17 is located at the outside of the lid 16, and the fixed lid 17 passes through Screw is fixedly connected with one end of connecting shaft 12, and the other end of the connecting shaft 12 passes through mounting rack 2 and injects in the air inlet. Mounting rack 2 is coated on the outside of filter core 14.

The connecting shaft 12 is hollow tubular structures, and multiple air inlets 9 are offered in the connecting shaft 12 inside filter core 14. Company between connection, fan guard 5 between crankcase 1 and cylinder cap 4 and the connection between lid 16, fan guard 5 and connecting plate 15 Connect is to be detachably fixed connection.

The present embodiment further includes a kind of cooling of oil-free piston type air compressor of closed crankcase 1 with dual-cooled Method, comprising the following steps:

The working principle of the present embodiment: the output shaft 7 on driving motor 3 is rotated with movable eccentric wheel, so that connecting rod 8 be made to drive Piston does reciprocating linear motion, and during piston moves downward, the intake valve 10 being set on piston is opened, and sucks outside air, and And intake valve 10 is individually arranged on piston can increase exponentially air inlet section product, is reduced intake resistance and air inlet number, is promoted Intake efficiency carries out compression to air in piston upwards and is passed through compressed air out by the exhaust valve 11 on valve plate Stomata discharge；In moving back and forth breathing process, outside air is entered in closed crankcase 1 piston by air filter, and The components such as bearing, connecting rod 8 are cooled down, is then entered in cylinder 19 by the intake valve 10 on piston again, realizes song The inside refrigerating function of axle box 1, closed 1 space of crankcase becomes good anechoic room in this course, can dramatically ground Noise is reduced, while also avoiding the piston caused by of the impurity such as extraneous dust, particle and pulling, grinding for cylinder 19 Damage, effectively raises job stability and the service life of compressor；Driving motor 3 also can band while driving reciprocating motion of the pistons Dynamic 13 blade of centrifugal fan rotation, and under the water conservancy diversion through fan guard 5 and lid 16, cold air is blowed to and is radiated by centrifugal fan 13 The parallel direction of fin, to realize high-temperature area (19 peripheral region of cylinder cap 4 and cylinder of cooling air-flow guiding air compressor Domain), external forced cooling is formed, oil-free air compressor can effectively be controlled by inside and outside dual-cooled design Operating temperature ensures the safe and stable operation of air compressor, effectively extends the service life of piston ring.

Compared with prior art, the present embodiment has the advantages that

By by crankcase designs be enclosed construction, by the components such as piston, cylinder, bearing, connecting rod, eccentric wheel closing with In crankcase, avoid the impurity particles such as extraneous dust entrance caused by between piston and cylinder relative motion and generate It pulls, wear, extend the service life of the components such as piston, cylinder, and then the work for effectively raising compressor entirety is steady The qualitative and service life；Oil-free air compression can be effectively controlled by the internal cooling and external cooling dual-cooled design of setting The operating temperature of machine solves the problems, such as to cause to radiate because of crankcase closing bad, effectively extends the service life of piston； Since crankcase is closed, noise can be effectively reduced.

It will be apparent to those skilled in the art that the oil-free sky of closed crankcase with dual-cooled system of the utility model Air compressor include above-mentioned the utility model specification utility model content and specific embodiment part and attached drawing shown in Any combination of each section out, as space is limited and to keep specification concise without these combining each scheme constituted one by one Description.Within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done, should be included in Within the protection scope of the utility model.

Claims

1. a kind of closed crankcase oil-free air compressor with dual-cooled system, including crankcase, it is characterised in that: also Including valve plate, cylinder cap, piston rod part, driving motor, fan cover assembly, centrifugal fan；The valve plate is set to the song At the top of axle box, the cylinder cap is set to the valve plate top；The crankcase is fixedly connected respectively with the valve plate, cylinder cap and shape At closed crankcase structure；Piston rod part is equipped in the crankcase；The fan cover assembly, crankcase, driving electricity Machine is sequentially connected, and the fan cover assembly and the centrifugal fan constitute external cooling, and the piston rod part, crankcase are total It is internal cooling with constituting.

2. the closed crankcase oil-free air compressor according to claim 1 with dual-cooled system, feature exist In: the fan cover assembly includes fan guard, lid, connecting plate, air filter；The top of the fan guard and the lid Be fixedly connected, the bottom of the fan guard is fixedly connected by connecting plate with the outer wall bottom of the crankcase, the lid and Fan guard, connecting plate are coated on the crankshaft box shell back on the outer wall of driving motor and forming cavity；The fan guard group Part is fixedly connected with the crankshaft box outer wall, and the air filter is passed through at the top of lid and put in cavity.

3. the closed crankcase oil-free air compressor according to claim 2 with dual-cooled system, feature exist In: the piston rod part includes piston, cylinder, eccentric disc, bearing, connecting rod, piston pin；The piston is hollow tubbiness knot Structure, the piston it is opening down, piston pin mounting hole is provided on the piston；The piston be located in institute's cylinder and and its The top of cooperation, the piston is equipped with intake valve, and the cylinder is fixed at the top in the crankcase.

4. the closed crankcase oil-free air compressor according to claim 3 with dual-cooled system, feature exist In: eccentric mounting hole is offered on the eccentric disc；The outer wall of the flange of the driving motor and the crankcase is fixed to be connected It connects, the driving motor output shaft in the crankcase is fixedly connected with the mounting hole on the eccentric disc, and extend out to cavity It is interior；The eccentric disc, which is located in the big end end and is realized by bearing, to be rotatablely connected, and the small end of connecting rod end passes through axis It holds to be formed with piston pin and be rotatablely connected, the piston pin is fixedly connected with the piston.

5. the closed crankcase oil-free air compressor according to claim 2 with dual-cooled system, feature exist In: be socketed the centrifugal fan in the driving motor output shaft in the cavity, the centrifugal fan position in the cavity, institute It states position corresponding with the centrifugal fan blade on fan guard and offers flow-guiding channel, the flow-guiding channel is from inside to outside The circular passage being placed equidistant with.

6. the closed crankcase oil-free air compressor according to claim 5 with dual-cooled system, feature exist In: the outer wall of the crankcase is equipped with the radiating fin of multiple equidistantly distributeds, the water conservancy diversion direction of the radiating fin and institute It is parallel to state fan cover assembly outer direction；The cooling air-flow that the centrifugal fan generates is through the fan cover assembly and the heat dissipation Fin guiding realizes the external cooling of air compressor.

7. the closed crankcase oil-free air compressor according to claim 3 with dual-cooled system, feature exist In: position corresponding with cylinder is equipped with air inlet on the crankcase side wall far from driving motor, in the air inlet The central axis of heart line and cylinder is equipped with inlet channel between the crankcase and the cylinder, the air filter One end is injected in air inlet, and the other end of the air filter runs through the lid, and external cooling air-flow is through air filter Enter circulating cooling in crankcase with air inlet, then flows into cylinder interior through the intake valve on the piston, it is real before being compressed It is now cooling to compressor inside.

8. the closed crankcase oil-free air compressor according to claim 2 with dual-cooled system, feature exist In: the air filter include fixed lid, connecting shaft, the filter core being set in connecting shaft, on the lid with air inlet phase Mounting rack is arranged in corresponding position, and the filter core is located in the mounting rack, and the fixed lid is coated on mounting rack far from crankshaft One end of case, the fixed lid are fixedly connected by screw with one end of connecting shaft, and the other end of the connecting shaft passes through installation Frame injects in the air inlet.

9. the closed crankcase oil-free air compressor according to claim 8 with dual-cooled system, feature exist In: the connecting shaft is hollow tubular structures, and multiple air inlets are offered in the connecting shaft inside filter core.