CN101371042A

CN101371042A - A unit for generating and treating compressed aeriform fluids, with an improved cooling system

Info

Publication number: CN101371042A
Application number: CNA200680051920XA
Authority: CN
Inventors: D·巴贝里斯; A·比科
Original assignee: Faiveley Transport Italia SpA
Current assignee: Faiveley Transport Italia SpA
Priority date: 2005-11-28
Filing date: 2006-05-17
Publication date: 2009-02-18
Anticipated expiration: 2026-05-17
Also published as: WO2007060553A2; CN101371042B; EP1957795A2; WO2007060553A3; ITTO20050839A1; US20080298984A1; HK1129720A1

Abstract

The unit (1) comprises a positive-displacement compressor (2) including: a prime mover (4) , a rotatable shaft (5) rotatable by the prime mover (4) , and at least one cylinder (7-10) in which an associated piston (11, 12), coupled to the shaft (5) by means of a crank mechanism (13, 14), is mounted for sliding in a leaktight manner; and a heat-exchanger unit (3) for receiving and cooling the compressed fluid produced by the compressor (2). The unit comprises at least one tapping duct (41; 41a, 41b) extending between the heat-exchanger unit (3) and that region of the at least one cylinder (7-10) which is disposed between the associated piston and the shaft (5), the duct being suitable for supplying a flow of compressed fluid to that region in operation in a manner such that the flow of fluid can expand and be cooled further in that region.

Description

The unit that is used for producing and handling compressed gaseous fluid that has improved cooling system

Technical field

The present invention relates to a kind of unit that is used for producing and handling compressed gaseous fluid.

More particularly, the objective of the invention is a kind of generation and processing unit, this unit comprises:

Positive displacement (positive-displacement) compressor, this compressor comprises:

Prime mover;

Can be by the running shaft of this prime mover rotation; And

At least one cylinder body (cylinder), the piston that is associated in this cylinder body are mounted in the mode of sealing and slide, and this piston that is associated is connected on the axle by means of crank mechanism (a crankmechanism); And

Heat exchanger is used for admitting the compressed fluid that also cooling compressor produced.

Summary of the invention

The generation and the processing unit that the purpose of this invention is to provide the sort of type described above, it particularly comprises the positive-displacement compressor of so-called " not having oil ", promptly, the positive-displacement compressor that does not have oiling agent, this unit has improved cooling system, and this cooling system can make compressor that long operating life is arranged.

According to the present invention, unit by the sort of type defined above achieves this end and other purpose, it is characterized in that, this unit further comprises bleeder pipe, described bleeder pipe stretches between the zone of heat exchanger and described at least one cylinder body, that zone is arranged between the piston and running shaft that is associated, and described bleeder pipe is suitable for flowing to the compressed fluid of that zone supply in the course of the work, and mode is described fluid stream can be expanded also further be cooled in that zone.

Because these features produce the effectively effect of cooling on the rotary bearing of crank mechanism, by means of this crank mechanism this or each piston are connected on the rotatingshaft.Promptly there is not cooling particular importance such in the compressor of forced flow oiling agent or sputtered lubricant at oilless compressor.In fact, as known, sliding bearing is provided with the film of solid lubricant or is provided with the bearing unit of sealing, these sliding bearings are used for working under the condition of the oiling agent that does not have forced flow, and the bearing unit of the film of solid lubricant or sealing may lose efficacy being higher than under about 70 ℃ temperature.Therefore, for the long service live of these bearings, the operating temperature of controlling them is essential.

Description of drawings

Other characteristics of the present invention and advantage will become clearer by following detailed, provide these descriptions in the mode of non-limiting example purely with reference to accompanying drawing, in the accompanying drawings:

Fig. 1 is the perspective view that is used for producing and handle the unit of compressed gaseous fluid according to the present invention;

Fig. 2 is another perspective view of the unit shown in Fig. 1;

Fig. 3 is and perspective view like the view shown in Fig. 1, and illustrate produce and processing unit less than the cooling fan relevant with its cylinder body;

Fig. 4 is a perspective view, and it shows the part of Fig. 3 with the size of amplifying; And

Fig. 5 and 6 is respectively the sectional view of getting on the line V-V of Fig. 3 and VI-VI.

Embodiment

In Fig. 1 to 3, be used for producing and handling the compressed gaseous fluid according to the present invention and particularly represent with reference character 1 generally the unit of air.

In the illustrated embodiment, unit 1 is included in positive displacement (or positive displacement) compressor of representing with reference character 2 generally among Fig. 3, and the relevant heat exchange unit of representing with reference character 3 generally in figure such as Fig. 2, or the like.

Heat exchange unit 3 comprises for example two heat exchange parts (or heat exchange segment), and each heat exchange department belongs to the sort of type that has parallel flabellum, and an a branch of pipeline that is arranged parallel to each other or a volute (or coil pipe) stretch through these parts.

In the illustrated embodiment, positive-displacement compressor 2 comprises prime mover (or motive force) 4 (Fig. 1-3), motor for example, and it makes bent axle 5 rotate (Fig. 3-6) when work.Bent axle 5 is mounted in order to rotate in the rigid support housing 6 of the shape of box-like basically on the shell that is connected to prime mover 4.

In the embodiment who illustrates by way of example, positive-displacement compressor 2 comprises two pairs of

cylinder bodies

7,8 and 9,10, and these cylinder bodies are with relative paired mode (a kind of " box-shaped (boxer) " arranges) configuration.Yet the present invention is not limited to the configuration of the cylinder body or their 180 degree of this number.

Cylinder body 7-10 is connected on the supporting structure 6, and relevant piston is mounted in order to slide in sealing (or not having leakage) mode in each cylinder body.In accompanying drawing (Fig. 5), can only see and be mounted to the

piston

11 and 12 that slides in order in

cylinder body

9 and 10.

In known manner piston above-mentioned is connected on the bent axle 5 by means of corresponding crank mechanism, these crank mechanisms comprise connecting rod 13 and be used for realizing the pin 14 (Fig. 5) of hinged (or movable joint is connected) between connecting rod and pistons.

Referring to Fig. 3 and 4,

cylinder body

7,9 and 8,10 lays respectively at the same side of supporting structure 6, and they have the corresponding inlet connector that is connected on corresponding import (or air inlet) manifold 15 and 16.These cylinder bodies have corresponding output pipeline or the conveyance conduit on the corresponding part that is connected to heat exchange unit 3.Heat exchanger is the compressed fluid that is used for cooling off by compressor 2 outputs, and specifies connection to be used for unshowned user's pneumatic circuit.

Inlet manifold

15 and 16 is connected on the support plate 17 between the shell that is interposed in supporting structure 6 and prime mover 4 (Fig. 1-3).

Fan unit represents with reference character 18 generally that in Fig. 1 and 5 this fan unit is associated with positive-displacement compressor 2.In the embodiment who illustrates by way of example, fan unit 18 comprises supporting structure 19, the cross section of this supporting structure is essentially the shape (Fig. 5) of C shape, it has upper arm or upper limbs portion 20, underarm or lower limb portion 21, and the intermediate portion 22 that forms definite shape, defining four perforate 27-30 at this intermediate portion, these perforates are respectively in the face of cylinder body 7-10.In each perforate, be equipped with in order to produce the corresponding electric fan 37-40 (Fig. 1,5 and 6) of air stream, be used for each relevant cylinder body of cooling compressor 2.

Be subjected to the fan 37-40 of motor driven preferably to belong to " suction " type, still, also do not get rid of the possibility that they belong to " extrapolation " type about each relevant cylinder body 7-10.

As especially by Fig. 1,2 and 5 can see like that, the

end arm

20 and 21 of supporting structure 19 is connected on the relative end of two parts of heat exchanger 3, and, these end arms are with transverse plate 17 and with the substantially parallel hexahedral box shaped casing that helps to determine a compactness in the face of the end plate 31 (Fig. 2) of transverse plate 17, this shell encapsulated the supporting structure 6 of bent axle 5 and each cylinder body 7-10 of positive-displacement compressor.

Referring to Fig. 3,4 and 6, in according to generation of the present invention and processing unit 1, corresponding bleeder pipe is associated with the cylinder body of compressor, and these cylinder bodies are stretched by the same side of central support structure 6.At Fig. 3, in 4 and 6, only can the visible bleeder pipe 41 that is associated with cylinder body 8 and 10.Especially referring to Fig. 6, bleeder pipe 41 by the part that is associated of heat exchanger 3 the outside of supporting structure 6 and above stretch, and be stretched over (Fig. 4 and 6) in that structure through perforate subsequently with reference character 42 expressions.In the illustrated embodiment, bleeder pipe 41 separately, forms two 41a of branch and 41b (Fig. 3 and 4) in supporting structure 6, and these branches bend to L shaped towards the piston that is associated.The 41a of branch of bleeder pipe 41 and the terminal of 41b in piston that being arranged at of

cylinder body

8 and 10 is associated and supporting crankshaft 5 usefulness so that stretch in those zones between the structure 6 that its rotates.

Replacement scheme as an above-described configuration, bleeder pipe 41 can be stretched by a position in the drying apparatus in the output that is connected to heat exchanger 3 (this device is) downstream, and perhaps the drainage (a drain region) by such drying apparatus stretches.

In the course of the work, extract air stream compressed and cooling out by the end of heat exchanger 3, and this air stream given in the zone below the piston of delivering in

cylinder body

8 and 10 by bleeder pipe 41 and its terminal branch 41a and 41b.Air stream compressed and cooling expands in that zone, and to piston, hinged pin 14 and the corresponding connecting rod 13 that is associated effectively cooled off.The effect of this cooling has prevented that the temperature of the bearing of crank mechanism from raising in the course of the work, thereby has avoided the composite lubricating film that is associated with these bearings is caused the danger of damage, guarantees the corresponding prolongation of their operating life.

Equally effectively piston and cylinder body have been realized cooling.

Though can't see in the accompanying drawings, also be provided with similar bleeder pipe for the

cylinder body

7 and 9 of opposite side.

For example, be housed in electronic control unit in the holding device 50 on the housing that is connected to prime mover 4 advantageously be associated (Fig. 1 and 3) with the fan 37-40 that is subjected to motor driven.

This control unit advantageously is configured to start the fan 37-40 that is subjected to motor driven at starting with a predetermined advancement amount of prime mover 4, and turn-offs the fan that is subjected to motor driven with a predetermined delay after prime mover turn-offs.

Advantageously, for example pre-determine the advancement amount size that is subjected to the fan of motor driven in startup according to the one or more somes place in the unit in the course of the work near near the detected temperature cylinder head or crank mechanism.Same step also advantageously is applied to turn-off the retardation of the fan that is subjected to motor driven.

Had by the fan of motor driven necessarily lingeringly to turn-off to have prevented or reduced the thermal shock that the cylinder body by positive-displacement compressor brings at least.

Nature, when principle of the present invention keeps identical, at those embodiments that describe and illustrate in the mode of non-limiting example purely, embodiment's the form and the details of structure can change in very wide scope, and do not depart from the scope of determining in appending claims of the present invention.

In the embodiment who does not illustrate, a plurality of fans of motor driven that are subjected to are associated with that or each cylinder body.

In other embodiment who does not illustrate, the fan that is subjected to motor driven that the city is single is associated with two or more cylinder bodies.

In all cases, can advantageously control the fan that is subjected to motor driven or the rotational velocity of a plurality of fans, mode is to form ice such as preventing on heat exchanger or a plurality of heat exchanger 3.

In all cases, that or each are subjected to the fan of motor driven and/or the control corresponding device can be so that be subjected to the sense of rotation of the fan of motor driven can be according to the temperature of outside and/or at the temperature inversion of the gaseous fluid of the outlet of heat exchanger 3.In this case, it is possible arranging the switching of sense of rotation according to the weather conditions of outside.

Make heated air to extract out like this, carried, for example under the weather conditions of certain environment, can do like this towards heat exchanger by zone around cylinder head or a plurality of heads.Particularly when heat exchanger was associated with a film drier, it was useful especially doing like this, and this film drier will become no longer valid when particularly being lower than 0 ℃ when the circuit air temperature is low therein.

In comprising the embodiment of film drier, can be advantageously be subjected to the rotating speed of the fan of motor driven according to external temperature and/or in a predetermined functions control of the temperature of the gaseous fluid in the outlet port of heat exchanger 3, this will consider for example such be lower than the fact that about 0 ℃ temperature drying device generally can not be worked effectively.

At last, though top description and accompanying drawing relate to single-stage positive-displacement compressor,, the present invention also certainly is used for multistage compressor.

Claims

1. one kind is used for producing and handling compressed the gaseous fluid particularly unit of air (1), and it comprises:

Positive-displacement compressor (2), described positive-displacement compressor comprises:

Prime mover (4);

Can be by the running shaft (5) of described prime mover (4) rotation; And

At least one cylinder body (7-10) wherein is connected to the piston that is associated (11,12) on the described running shaft (5) by means of crank mechanism (13,14) and is mounted in the mode of sealing and slides; And

Heat exchanger unit (3) is used for admitting and cooling off the compressed fluid that described compressor (2) is produced;

Described generation and processing unit are characterised in that: described unit comprises at least one bleeder pipe (41; 41a, 41b), described bleeder pipe stretches between that zone between described heat exchanger unit (3) and described piston that is associated of being arranged at of described at least one cylinder body (7-10) and the described running shaft (5), described bleeder pipe is suitable for flowing to the compressed fluid of that zone supply in the course of the work, and mode is to make described fluid stream to expand in that zone also further to be cooled.

2. according to the described unit of claim 1, it is characterized in that described unit is associated with exsiccator in the output that is connected to described heat exchanger (3), and at least one described bleeder pipe (41) a bit stretching by the outlet downstream of described exsiccator wherein.

3. according to claim 1 or 2 described unit, it is characterized in that the automatically controlled fan that is subjected to motor driven (37-40) is associated with described at least one cylinder body (7-10).

4. according to the described unit of claim 3, it is characterized in that, control gear (50) with described or each be associated by the fan (37-40) of motor driven, and can be so that the shutoff of fan has a predetermined delay at the shutoff of described prime mover (4).

5. according to claim 3 or 4 described unit, it is characterized in that, control gear (50) with described or each be associated by the fan (37-40) of motor driven, and the startup that is arranged such that fan has a predetermined advancement amount at the startup of described prime mover (4).

6. according to each described unit in the claim 3 to 5, it is characterized in that, depend on that in described unit detected temperature pre-determines the size of described advancement amount and/or described retardation.

7. according to the described unit of claim 6, it is characterized in that, in the described temperature of the head detection of described at least one cylinder body.

8. according to the described unit of claim 6, it is characterized in that, in described crank mechanism (13,14), detect described temperature.

9. according to each described unit in the claim 3 to 8, it is characterized in that, described at least one be subjected to the fan (37-40) of motor driven and/or the control gear that is associated can make according to the temperature of outside described at least one reversed by the sense of rotation of the fan (37-40) of motor driven, and therefore make the direction of the air stream that ventilates reverse.

10. according to each described unit in the aforementioned claim, it is characterized in that it comprises single cylinder body, the piston that is associated be installed in the described cylinder body slide, and, described at least one be associated with described cylinder body by the fan of motor driven.

11. according to each described unit in the claim 1 to 9, it is characterized in that, it comprises a plurality of cylinder bodies (7-10), wherein with corresponding piston (11,12) be mounted to the sealing mode slide, at least one is associated with each cylinder body (7-10) by the fan (37-40) of motor driven accordingly.

12., it is characterized in that corresponding a plurality of fans of motor driven that are subjected to are associated with each cylinder body (7-10) according to the described unit of claim 11.

13. according to each described unit in the claim 1 to 9, it is characterized in that it comprises a plurality of cylinder bodies (7-10), wherein with corresponding piston (11,12) be mounted in the mode of sealing and slide, be associated with one or more cylinder bodies in the described cylinder body by the fan of motor driven.

14., it is characterized in that according to each described unit in the claim 11 to 13, drive described or each is subjected to the fan of motor driven with certain rotational speed, prevent to go up and form ice at described heat exchanger (3).

15. according to each described unit in the claim 11 to 13, it is characterized in that, at least one film drier is associated with described unit, and wherein, drive described or each is subjected to the fan of motor driven with certain rotational speed, change described rotational speed according to a predetermined function of external temperature.

16. according to each described unit in the aforementioned claim, it is characterized in that, drive described or each is subjected to the fan (37-40) of motor driven with certain rotational speed and certain sense of rotation, according to determining described rotational speed and described sense of rotation according to temperature predetermined program at the gaseous fluid of the outlet of described heat exchanger (3).

17. one kind basically such as description and illustrated and be used for specific purposes be used for producing and handling the particularly unit of air of compressed gaseous fluid.