DE202011102405U1 - Pneumatic device or pneumatic system with an oiler device - Google Patents

Abstract

Pneumatic device or pneumatic system (1) with an oiler device (6), the dosing needle (7) or dosing spindle of which supplies a constant amount of oil from an available oil supply, as long as there is an outlet pressure in a room (2), characterized in that the lubricator device (6) is provided with a switching / regulating element (5) that directly or indirectly influences the function of the metering needle (7) or the valve spindle.

Description

The invention relates to a pneumatic device or a pneumatic system with an oiler device, the dispensing needle emits a steady amount of oil from an available oil supply, as long as there is a pneumatic pressure in a room.

Such oiler devices are used to form a fine oil mist in compressed air lines. Such an oil mist serves to lubricate the connected compressed air devices. Such a metered oil delivery is usually carried out by means of a pneumatic pressure drop, which is generated or achieved by a control valve or a cross-sectional change of the space in which the outlet pressure prevails.

A device for atomizing oil in a compressed air line is in the DE 24 20 050 A1 described. There, a device for atomizing oil in a compressed air line for supplying compressed air units, in which the oil supply in the compressed air line is controlled by the flow conditions in the compressed air line, that only when flowing through the compressed air line, an oil supply in the compressed air line he follows. Such a device is fraught with defects, since there is a steady oil consumption when concerns the corresponding compressed air.

Due to the fact that, for example, in existing systems, the lubricant consumption is proportional to the flow velocity of the air in the compressed air lines, so that there is too much oil is atomized. In addition, the control forces are comparatively low at low air velocities and there is not always a risk of the device functioning properly.

A person skilled in the art for applications in the compressed air sector either single pneumatic devices or composed of individual multiple modules pneumatic systems are known. Such modules may be, for example, pressure regulators, lubricators, filters, etc. In this case, such modules can be assembled into a pneumatic system. The compressed air entering there is influenced in the individual pneumatic devices so that at the output of such a pneumatic system, the compressed air in the desired manner, as the requirements of the customer demand is available. In such devices or systems, the lubricant consumption is proportional to the flow velocity of the air. Such a lubricant consumption is not very useful for all applications.

In the pneumatic device or a pneumatic system with an oiler device by a, between an output pressure and an inlet pressure pressure drop, the oil production as a steady amount of oil, for example via a drip chamber or a drip channel and then into the air flow (effective channel) of the output pressure into promoted. In this case, the oil supply in the oiler device is likewise preferably conveyed out of a storage container by the air flow within the active channel.

The object of the invention is to reduce the overall oil consumption in such pneumatic devices or pneumatic systems and at the same time to improve so that the oil flow rate is as independent as possible of prevailing pressure and temperature conditions. However, the amount of oil should always be such that the connected compressed air devices are not damaged.

The object of the invention is solved by the features of claim 1. The dependent claims provide a further embodiment of the inventive concept again.

To accomplish the task, a volumetrically controlled or controlled amount of the oil is metered as needed by means of an electrical control or regulating device. This controlled or controlled amount of oil is only available if there is also an outlet pressure.

In order to achieve the object of the invention, the lubricator device has a switching or control element which influences the functions of the dispensing needle or a valve spindle. In this case, the switching / regulating element can be designed as a switching valve or as a proportional valve or as an electromagnet or as an electric motor or the like.

In this case, by the switching or control element, the position of the dispensing needle or the valve stem with its valve body axially influence so that each intermediate position can be achieved in addition to a closed position and a total open position in the embodiment as a control element. This is particularly important if the viscosity of the oil changes or even if, depending on the application, a large or reduced amount of oil within the air stream is needed. Even through the use of a corresponding electronic control, which networks a plurality of pneumatic devices or pneumatic systems with each other, it is possible to selectively make a targeted influencing of the oil supply via a bus device in conjunction with the switching / regulating elements as an actuator.

It is understood that such a switching / control element can be retrofitted to a pneumatic device or a pneumatic system. As a result, the flexibility in terms of the devices used is significantly increased, without having to make an expensive replacement of entire devices or modules.

The invention will be described below with reference to the 1 illustrated possible embodiment explained in more detail.

In the 1 is a possible embodiment of a pneumatic unit / device 1 reproduced with an oiler 6 Is provided. The oiler 6 has a dispensing needle or a valve spindle which volumetrisch a not shown oil flow, for example, in a drip chamber 8th with subsequent drip channel 9 in an active channel 12 performs. The active channel 12 is with a room 2 connected, in which the pneumatic outlet pressure is present. The oiler 6 is with a switching / regulating element 5 equipped, in which over a connecting element 4 the connection between the switching / control element 5 and the dispensing needle 7 or the valve stem is made. Such a switching / regulating element 5 can be designed as a switching valve in the form of a solenoid valve or as a proportional valve or as a motor or the like.

By the switching / control element 5 causes the amount of oil via the dispensing needle or the valve stem with the valve seat can be volumetrically controlled or regulated. In the case of a control, the dispensing needle or the valve spindle 7 opened and closed, which is carried out in time via an electronic control, not shown, preferably in conjunction with a bus system. This is a targeted control of the flow of oil within the room 2 possible and it must not constantly come as in the prior art to an oil nebulization within the output pressure, which is not always desirable.

In the execution of the switching / control element 5 As a control device, for example as a proportional valve or in the form of an electric drive, the opening of the dispensing needle or the valve stem relative to the valve seat can be selectively influenced. Compared with the control of the oil supply, the control of the oil supply is much finer and can thus be better adapted to the desired consumption.

The oil supply is via the connection 3 to the dispensing needle 7 or realized the valve stem.

LIST OF REFERENCE NUMBERS

1

Pneumatic device / pneumatic system

2

room

3

Oil supply

4

connecting element

5

Switching / regulating element

6

oiler

7

Dispense

8th

drip chamber

9

drip channel

12

active channel

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 2420050 A1 [0003]

Claims (6)

Pneumatic device or pneumatic system ( 1 ) with an oiler device ( 6 ), whose dispensing needle ( 7 ) or dosing spindle from an available oil supply emits a steady amount of oil, as long as in a room ( 2 ) there is an outlet pressure, characterized in that the oiler device ( 6 ) with a switching / control element ( 5 ), that the function of the dispensing needle ( 7 ) or the valve stem directly or indirectly influenced. Pneumatic device or pneumatic system according to claim 1, characterized in that the switching / regulating element ( 5 ) is designed as an electrical control or regulating device. Pneumatic device or pneumatic system according to claims 1 or 2, characterized in that the switching / control element ( 5 ) is designed as a switching valve or as a proportional valve or the like. Pneumatic device or pneumatic system according to one of the preceding claims, characterized in that the switching valve is designed as a solenoid valve or the like. Pneumatic device or pneumatic system according to one of the preceding claims, characterized in that the switching / regulating element ( 5 ) is networked with an electronic control, preferably via a bus system or the like. Pneumatic device or pneumatic system according to one of the preceding claims, characterized in that the switching / regulating element ( 5 ) can be retrofitted.

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