WO2011107203A1

WO2011107203A1 - Improved oiler for textile machines

Info

Publication number: WO2011107203A1
Application number: PCT/EP2011/000545
Authority: WO
Inventors: Markus Hermann; Richard Kaufmann; Sascha Schleeh; Alfred Lampprecht
Original assignee: Memminger-Iro Gmbh
Priority date: 2010-03-05
Filing date: 2011-02-05
Publication date: 2011-09-09
Also published as: TW201200660A; CN102812171B; BR112012022103A2; DE102010010525A1; DE102010010525B4; BR112012022103B1; TWI448594B; CN102812171A

Abstract

The oiler (1) according to the invention is in particular suited for the operation at low air pressure and for applications with a very low consumption of compressed air. Said oiler has an atomiser (6) which sprays downward and below which an oil collecting unit (7) is disposed. The oil collecting unit is characterised by large oil traps (45) which are disposed concentrically around a central passage (46). The oil traps (45) cover the surface of a ring which is disposed concentrically with respect to the central axis (26) and the atomiser jet (27) and is only separated by radial partitions (47).

Description

Improved oiler for textile machines

The invention relates to a textile machine oiler, in particular for knitting machines, e.g. Circular knitting machines or flat knitting machines.

Knitting machines and other textile machines usually require an oiler to moving parts, such as knitting needles, boards and the like, in operation with a

Supply lubricating film. Lubricant feed must be carefully metered to avoid contamination of the textiles by lubricants. An excessive supply of lubricant is just as unacceptable as an insufficient supply of lubricant, which leads to inappropriate wear.

Most are used as textile machine oiler compressed air actuated devices, as they are known for example from DE 30 28 125 C2. The oiler illustrated there has a pressurized oil tank. In the tank, an atomizer for generating an oil mist is provided, which is blown through connecting lines as an air oil mixture to lubrication points of the knitting machine. To generate the

Oil mist is provided a nozzle which produces an approximately conical spray jet. In most embodiments, hollow drilled pins on a rim are provided above the nozzle to receive the oil mist. In a different embodiment, the nozzle is arranged to blow down and the pins are arranged below the same. The faces of the pins are small, so they absorb little oil mist. Nevertheless, on or at the respective end faces of the spigot oil accumulations may form that can be dragged from time to time in the pipes for oil and air. This can lead to excessive lubrication when the oil accumulation arrives at the lubrication point. This appearance is special

pronounced when working to reduce the compressed air consumption with low air pressure and small amounts of compressed air.

It is an object of the invention to provide an improved lubricator. This object is achieved with the lubricator according to claim 1:

The oiler according to the invention preferably has a downward blowing

Nebulizer for generating an oil mist on, as well as an oil-collecting device, which is arranged below the atomizer. The oil catcher has outputs from which leads to the lubrication points to supply an oil-air mixture. Due to the arrangement of the oil-collecting device below the atomizer, the oil precipitate forming in the oil-collecting device is continuously fed into the oil

Lubrication points led lines. The longer accumulation of oil and thus the formation of larger accumulations of oil, which could occasionally be dragged into the lines, is avoided. In this way, the uniform oil supply to the lubrication points is ensured.

This is especially true when operating with fluctuating and very low compressed air flow rates. Compressed air is required to operate the atomizer and atomize the oil. The inventive concept makes it possible here to make do with very small amounts of compressed air. Pressure fluctuations that lead to a change in the

Droplet size in oil mist can play a minor role. In any case, the generated oil mist will strike the oil catcher device arranged below the atomizer device. From there, the oil mist and any oil precipitate forming on the capture device can be conveyed to the lubrication points.

The oil catch bags each have a cross section, which is preferably greater than the cross section of the connected lines. The pocket cross section is measured transversely to the pocket flow direction. He is at least bigger than that

Flow cross section of the connected lines, but preferably greater than the outer cross section of the lines to be connected. In a preferred embodiment, what has been said above applies correspondingly to the oil and air line (s). Due to the large catch cross-section of the oil catch pockets, which are preferably arranged as a wreath and thereby preferably occupy a closed annular surface, each oil catch pocket takes on a temporally and spatially averaged share of the oil mist of the oil mist spray cone. Irregularities and fluctuations in the oil mist spray cone and / or variations in oil droplet size and density are above the catching cross-section of the oil mist catcher pocket and thus result in averaging the amount of oil collected. The leads to a uniform, fine

adjustable oil flow in the laxative pipe. In this way, the

Nebulizer device to be designed for minimal compressed air consumption. It can be operated at an operating point where it produces not only very fine oil mist but a (cone or hollow cone) jet with oil droplets of different sizes. Such an operating point can usually be achieved with very low compressed air flows and also with low air pressures. Preferably, both the atomizer and the catcher are disposed within an outwardly closed oil tank, in which also the oil reservoir can be located. Preferably, the oil tank is under a pressure increased from the environment to promote the oil mist out of the oil tank to the lubrication points. The textile machine oiler is preferably provided with a compressed air connection via which compressed air can be conducted on a way to build up a pressure cushion in the oil tank and on another way to the atomizer device. The compressed air introduction into the oil tank is preferably done via an adjusting or regulating device to ensure that the pressure within the oil tank is lower than the pressure at the

Nebulizer device pending compressed air. However, because of the downward spray of the nebulizer and the large oil catcher cross section of the oil capture pockets, only relatively low pressure is required on the nebulizer.

The atomizer preferably operates on the jet pump principle to produce an oil mist. The jet pump can suck oil directly from the oil reservoir of the oil tank or, in another design, from an intermediate reservoir, which is continuously filled out of the oil tank in order to guarantee a constant suction lift for the operation of the jet pump.

The oil catcher preferably has an open passage coaxially aligned with the atomizer, which is surrounded by a ring of oil catch pockets. The oil catch pockets have at their upper, the atomizer facing side narrow edge-like edges on which no oil accumulations,

in particular can not hold oil drops. Oil deposited on the walls of the oil catches either runs inward towards the outgoing pipes or runs outwards and thus back into the oil reservoir. Due to the diminished tendency towards the formation of temporary oil accumulations, the atomizer nozzle can

Atomizer device work with extremely low air volumes. There is no need to blow off any accumulations of oil, because these run down by themselves, for example, through the central opening of the oil-collecting device.

Further details of advantageous embodiments of the invention are the subject of the drawing, the description or claims. Show it:

- Figure 1 shows a textile machine oiler inventive design, in a schematic representation.

FIG. 2 shows the textile machine oiler according to FIG. 1, in a simplified sectional view, FIG. 3 shows the atomizer module of the textile machine oiler according to FIG. 2, in a first vertical sectional view,

- Figure 3a, the atomizer module of Figure 3 in a fragmentary

Detailed illustration,

- Figure 4, the atomizer module of the textile machine oiler of Figure 2, in a

second vertical sectional view, and

- Figure 5, the oil-collecting device of the atomizer module, in a perspective view.

In Figure 1, an oiler 1 is illustrated, for example, the oil supply of a

Knitting machine or another machine, in particular textile machine is used. The oiler 1 can simultaneously supply one or more lubrication points with oil. The oiler 1 is adapted to deliver to the lubrication points an oil / air mixture. The oiler 1 has a preferably closed housing 2, which serves as an oil tank or in which an oil tank 3 is arranged. In addition, the oiler 1 is a Zerstäubermodul 4, which serves to generate an oil mist. The atomizer module 4 is a built-in oil tank 3 unit, which is preferably removable as a whole. For this purpose, the atomizer module 4 preferably sits in an opening of the oil tank 3 and is in this with suitable fastening means, e.g. Screws, held. It can be detached from the oil tank 3 and cleaned as needed.

The atomizer module 4 is operated with compressed air. Preferably, the atomizer module 4 is preceded by a pressure regulator 5 or another device for reducing or regulating the pressure of incoming compressed air.

The atomizer module 4 includes a metering distribution device that is configured to generate a steady stream of oil droplets. The metering distribution device may be a piston pump, e.g. one oil drop per piston stroke through one or more oil nozzles. One or more of such oil droplet dispensing nozzles may be provided which produce an oil droplet stream of larger cross-section. Such an embodiment comes with very small amounts of compressed air. The piston pump can be operated by compressed air. The oil droplet stream may encounter an oil trap 7, which catches droplet subflows and distributes them to conduits.

In the preferred embodiment, the Dosierverteileinrichtung is formed as a Zerstäuber- device 6. Below this, the oil-collecting device 7 is arranged. From the oil-collecting device 7 go lines 8 to individual lubrication points, which are not further illustrated. FIG. 2 illustrates in more detail an embodiment of the oiler 1 according to the invention. As can be seen, the oil tank 3 is closed on all sides. At its top, a lid 9 is provided, which closes the oil tank 3 upwards and from which the atomizer module 4 protrudes. In addition, 9 more connections and adjusting members are provided on the lid. A compressed air connection 9a serves to supply the atomizer module 4 via a channel and the compressed air to the oil tank 3 via another channel. While the atomizer module 4 is supplied via a line 10 preferably directly with compressed air, the supply of compressed air into the interior of the oil tank 3 is preferably via a pressure reducing device 11. The pressure reducing device 1 1 may have a pressure regulator or possibly also only a throttle device or other adjusting device ,

In the present embodiment, above the actual one in the oil tank 3

provided oil reservoir 24 an oil reservoir 2 is provided, which is continuously supplied via a pumping device 13 with oil. The oil reservoir 12 is arranged independently of the oil level in the oil tank 3 at a given height and serves to supply the

Atomizer device 4.

The pumping device 13 is preferably operated by compressed air. It comprises a riser 14 into which compressed air is introduced via the pressure-reducing device 11 and a line 15. This bubbles upwards starting from a nozzle 16 arranged at the lower open end of the riser pipe 14, thereby also conveying oil in the riser pipe 14 upwards. The oil occurs at a e.g. lateral opening 17 above the reservoir 12 and fills this.

The atomizer module 4 is supplied with oil via an oil line 18. It sucks the oil while from a metering chamber, which is covered and visible above a transparent cap 19 or another viewing window. The interior 20 of the metering chamber is largely closed to the outside. He is supplied via a riser 21 with oil. This drips in a continuous stream in the interior 20. To adjust the pressure in the interior 20, this is connected via a channel 22 and a throttle 23 to the interior of the oil tank 3.

In an alternative embodiment, the reservoir 12 and the pump device 13 are omitted. In this case, either the line 18 or the riser 21 leads directly into the oil reservoir 24th The atomizer module 4 is illustrated separately in FIG. The atomizing device 6 and the oil-collecting device 7 are arranged one above the other vertically above each other. At the top of arranged atomizer 6 are connections 25 for connecting the not further illustrated here, leading to the lubrication points

Lines 8 provided. The terminals 25 are arranged on an imaginary circle, which is preferably arranged concentrically to a central axis 26 of the atomizer module 4.

The atomizing device 6 includes as a central element an atomizing nozzle 27, which also emerges from FIG. 3a. The atomizer nozzle 27 has a central oil passage 28 which terminates at a downwardly directed nozzle orifice 29. An air channel 30 strikes the oil channel 28 at an annular gap.

The atomizing nozzle 27 is held between an upper lid 31 and a lower lid 32. The two outside in the outline preferably circular lid 31, 32 sit sealingly flat on each other. The atomizing nozzle 27 consists of the upper lid 31, an insert 32a and the lower lid 32. A provided on the upper lid 31 cylindrical, outside (ie on its outer peripheral surface) provided with a seal projection 34 projects into the extended upper end of the oil passage 28th The covers 31, 32 are flat and lie flat and sealing against each other. They receive the insert 32a between each other in a chamber or pocket formed in the lower lid 32. The atomizer nozzle 27 having a circular cross-section is seated centrically and sealingly in the opening of the receptacle 33. The extension 34 contains an oil channel which communicates with a radial section of the oil channel of the cover 31. The oil passage is fed via a pipe 38 with oil, which connects the atomizer 6 with the oil catcher 7. The tubes 36, 38 hold the top and bottom of the nebulizer module 4 together and transport oil and air.

The air channel 30 communicates with an annular groove 37 provided on the upper flat side of the atomizing nozzle 27, which in turn communicates via an air channel 35 extending radially into the upper cover 31 and then branching off downwards through the lower cover 32. This is supplied via a pipe 36 with air, the

Atomizer 6 connects with the catcher 7. The tube 36 is connected to the

Compressed air line 10 connected. The receptacle 33 has a central, preferably cylindrical opening, in which a lower disc-shaped extension of the lower lid 32 is seated. Above this opening, a pocket is present, which receives the two covers 31, 32. The edge surrounding this pocket 39 has a ring of vertical openings, each having a cylindrical portion at the top. In these sections, fittings 40 sit for connection of the lines leading to the lubrication points. For this purpose, the connecting pieces 40 each have a cylindrical section provided on the outside with at least one seal. The protruding from the edge 39 part of the respective connector 40 may be formed as a hose connection piece. Also, the fittings 40 may be threaded into the vertical openings.

At its lower end, the connecting pieces 40, which are penetrated by a central bore, as shown in FIG. 4, have a funnel opening 41, which adjoins a space 42 which narrows again downwards, formed in the rim 39. This goes down into a connecting piece 43 for a riser 44 for oil and air over.

Each riser 44 connects the oil collecting device 7 with the respective one

Lubrication point leading line to supply this oil-air mixture. The oil-air mixture is provided by atomizer 6 as a downwardly directed conical oil mist spray. For receiving the same, the oil-collecting device 7 for each laxative line in each case an oil-catching pocket 45. The oil catch pockets 45 are preferably identical to one another and arranged on a concentric to the central axis 26 circle. The oil catch pockets 45 together form an oil collecting cross section. This is preferably greater than half of the measured at the same height (circular or Kreisring-) cross section of the oil mist spray cone. The oil mist spray cone can be a full cone or a hollow cone. The oil catch pockets 45 make it possible to absorb a larger proportion, preferably at least 5% to 30%, of the oil mist spray cone so that local irregularities in the oil mist flow do not affect the oil distribution between the individual lubrication points.

The oil catch pockets 45 may be disposed on one or more concentric rings. The oil catch pockets 45 of the two rings may have the same or different cross-sectional areas and thus different collecting cross sections. The latter can be used to achieve 45 equal oil catches for spray cones with non-uniform oil density in all oil catch bags. The oil catch pockets 45 are, as mentioned, arranged in a ring around a central opening 46 and open to the top of the atomizer 6 out. The oil catching pockets 45 are separated from one another by walls 47 which are preferably oriented radially relative to the central axis 26. These walls 47 preferably extend vertically, ie parallel to the central axis 26. The following description of an oil trap bag 45 is representative of all oil catch bags.

The size of the oil catch pockets 45 and the diameter of the collar formed by them is preferably such that the oil catch pockets 45 are in the outer region of an oil spray jet. This preferably has an opening angle of 30 °. The oil catching pockets 45 preferably occupy the range of 10 ° to 30 °. They thus catch preferably 5% to 30% of the generated oil mist.

The oil catching pocket 45 is closed at its upper portion by further walls 48, 49 to the central opening radially inwardly and radially outwardly. In plan view, the radial walls 47 and the inner and outer walls 48, 49 each form an approximately trapezoidal in the outline or in plan view closed wall arrangement. The area of the trapezoid, ie the cross section of the oil trap pocket 45 is greater than the cross section of the riser 44 or the discharge line 8. The walls 47 are preferably higher than radially inner or radially outer walls of the oil catch pockets 45th If at least the outer wall 49 or, additionally or alternatively, the radially inner respective wall 48 is lower than the intermediate wall 47, the lower wall 49 (or 48) may serve as an overflow. For example, if no oil is removed from an oil trap 45 and it fills with oil, no oil can overflow into the adjacent oil trap 45. Instead of the low construction of the entire wall 49 or 48, an oil overflow notch provided in the relevant wall or another opening of the same type may also be provided. The walls 47, 48, 49 preferably terminate at the top in a narrow edge 50, which is so narrow that oil puddles or drops of oil can not form thereon. The oil catching pocket 45 also has a substantially funnel-shaped bottom 51, from which an oil passage 52 branches off. The oil passage 52 initially leads vertically downwards and then merges into a radially extending section. From this he continues up to a port 53 to which the riser 44 is connected. The oil-collecting device 7 is preferably formed in the form of two plates, which are arranged one above the other and firmly connected to each other. The upper plate has the oil catch pockets 45. The channel 52 is also disposed in the upper plate 54. The lower plate 55 closes the oil passage 52 down. The oiler 1 described so far works as follows:

In operation, compressed air is applied to the compressed air port 9a. Via the line 10, the compressed air is passed directly to the atomizer module 4. A small part of the compressed air is diverted and passed for example via the pressure reducing device 11 and the line 15 in the pumping device 13. There ascending air bubbles promote a flow of oil into the oil reservoir 12. At the same time the interior of the oil tank 3 is supplied with compressed air. However, this is under a lower pressure than the air supplied to the atomizing device 6.

The exiting compressed air sucks through the oil passage 28 and ultimately via the pipe 38 and the oil line 18 oil from the interior 20 at which it is thereby kept under reduced pressure at the atomizing device 6 results in an air flow through the air passage 30 of the atomizer. The reduced pressure causes constantly oil is passed through the riser 21 into the inner space 20 and provided there for the atomizer 6.

Alternatively, the pipe 38 communicate via a suitable line also directly to the oil reservoir 24 and suck oil from it.

The spray nozzle 27 produces a spray cone 56 of fine oil droplets. These rain from the top of the oil catch pockets 45. The present in the oil tank 3 air pressure causes the oil-air mixture further promoted via the oil passage 52 and the riser 44 to the respective port 40 and to the connected there leading away line becomes. Oil precipitation at the inner surfaces of the walls 47, 48, 49 delimiting the oil catching pocket 45 runs directly over the funnel-shaped bottom 51 into the oil channel 52 and is carried away continuously. The ascending in the riser 44 oil-air mixture thus contains no major accumulations of oil.

On the outer surfaces of the walls 48 incident and there precipitating oil mist is discharged via the central opening 46 downwards. Outside on the walls 49

impinging oil can also flow outward. Part of the spray hits the oil catch pockets 45 and is thus ultimately conveyed to the lubrication points. Unlike known oilers, the oiler according to the invention has a low compressed air consumption.

The oiler 1 according to the invention is particularly suitable for operation with low air pressure and for applications with very low compressed air consumption. It preferably has a downward-spraying atomizer 6, below which an oil-collecting device 7 is arranged. This is characterized by large oil catch pockets 45, which are arranged concentrically around a central passage 46 around. The oil catch pockets 45 cover the surface of a circular ring, which is arranged concentrically to the central axis 26 and the spray nozzle 27 and separated only by radial partition walls 47.

reference numeral

1 oiler

2 housings

3 oil tank

4 atomizer module

5 pressure regulator

6 atomizer device

7 oil catcher

8 lines

9 lids

9a compressed air connection

10 line

11 Pressure reducer

12 oil reservoir

13 pumping device

14 riser

15 line

16 nozzle

17 opening

18 oil line

19 cap

20 interior

21 riser

22 channel

23 throttle

24 oil supply

25 connections

26 central axis

27 atomizer nozzle

28 oil channel

29 nozzle mouth

30 air duct

31 upper lid

32 lower lid 32a use

33 recording

34 extension

35 air duct

36 pipe

37 annular groove

38 pipe

39 edge

40 fittings

41 funnel opening

42 room

43 connecting pieces

44 riser

45 oil catch bag

46 central opening

47 radial wall

48 inner wall

49 outer wall

50 edge

51 floor

52 oil channel

53 nozzles

54 upper plate

55 lower plate

56 spray cone

Claims

claims

1. textile machine oiler (1), in particular for knitting machines,

with a metering distribution device, for generating an oil droplet stream,

with an oil collecting device (7) which is arranged at a distance from the Dosierverteilereinrichtung and oil collecting pockets (45) having vertical walls, with outputs, to the lines leading to lubrication points (8) are connectable to an oil -Air mixture to lead to the lubrication points.

2. textile machine oiler according to claim 1, characterized in that the

Dosierverteilereinrichtung is designed as an atomizing device (6) which is adapted to produce a downwardly directed oil mist spray.

3. textile machine oiler according to claim 1, characterized in that the

Dosierverteileinrichtung an outwardly closed oil tank (3) is assigned, in which an oil reservoir (24) is provided, wherein a compressed air port (9a) is provided, via the compressed air for establishing a compressed air cushion in the oil tank (3) can be introduced, and wherein a Adjustment or control device (11) for influencing the compressed air access to the oil tank (3) is provided.

4. Textile machine oiler according to claim 2, characterized in that the

Sputtering device (6) comprises a jet pump assembly, which with the

Compressed air connection (9a) is connected.

5. Textile machine oiler according to claim 1, characterized in that the oil-catching device (7) with outputs (40) is connected, the rising from the textile machine oiler (1) ascending upward, wherein between the oil-catching device (7) and the outputs risers (44) are arranged.

6. textile machine oiler according to claim 1, characterized in that each oil catching pocket (45) has a cross section which is greater than the cross section of a line leading to the respective lubrication point (8), wherein the oil collecting bags at least 5% to 30% of the output from the Dosierverteileinrichtung oil flow are arranged detecting.

7. textile machine oiler according to claim 1, characterized in that the oil-catching device (7) has a central, to the atomizing device (6) coaxial aligned passage (46) surrounded by a ring of oil catch pockets (45).

8. Textile machine oiler according to claim 6, characterized in that the oil catch bags (45) are open at the top, separated by intermediate walls pockets each having a bottom outlet.

9. textile machine oiler according to claim 7, characterized in that the oil catch pockets (45) each have a funnel-shaped bottom (51).

10. Textile machine oiler according to claim 1, characterized in that the oil-catching device (7) has a seamless one-piece plastic injection part (54) formed on the oil collecting pockets (45) and connections (53) for ascending risers (44) are connected to a bottom plate (55).

1 1. textile machine oiler according to claim 1, characterized in that the

Atomizer module (4) sits at an opening of the oil tank (3) and is held in this.

12. textile machine oiler according to claim 1, characterized in that the oil-catching device (7) has oil catch pockets (45) which form a circular rim.

13. Textile machine oiler according to claim 1, characterized in that the oil-catching device (7) oil catch pockets (45) which form at least two concentric circular rings.

14. Textile machine oiler according to claim 13, characterized in that the oil catch pockets (45) between them have partitions which are higher than the radially inner or radially outer walls of the oil catch pockets (45).

15. Textile machine oiler according to claim 1, characterized in that the

Atomizer module (4) has an upper part with an atomizing device (6) and a lower part with an oil-collecting device (7), which are held together by tubes (36, 38).