DE2823558C2 - Device for monitoring complex machines such as compressor systems - Google Patents

Description

³³

⁵⁰

The invention relates to a device for monitoring complex work machines, such as compressor systems or the like according to the preamble of claim 1.

In machine systems, regular maintenance of individual elements is of fundamental importance. For example, regular maintenance must be carried out on oil-flooded compressor systems, with regard to · " the air filter, the oil filter, the oil change, the oil separator cartridge, the dirt trap in front of the Oil cooler and the like. In doing so, irregularities in maintenance can cause serious damage to the company Machine system and also lead to considerable consequential damage. The individual maintenance are often carried out after different hours of operation, what a requires special attention from the operator, although there is still some confusion with regard to the individual elements and thus operational disruptions.

DE-OS 25 35 004 a device for displaying a maintenance time has become known, for monitoring the installation of a catalytic converter in a motor vehicle, with Reaching a certain predetermined number of kilometers driven a jump switch and thus an advertisement is triggered. This arrangement works in a similar way to a "trip meter" like her in motor vehicles for displaying the number of kilometers driven since the last refueling or the like are common. One could think of providing appropriate devices for each element to be serviced. However, this would be relatively expensive, both in terms of the space required and the How to operate.

The invention is therefore based on the object of providing a monitoring device according to the preamble of claim 1 so that a plurality of items to be serviced simultaneously with only one hour meter can be monitored.

This object is achieved with a device according to the preamble of claim 1 with the Features of the character of this claim solved.

In itself, DE-OS 25 01280 is a Combined working time recording with the help of an electronic counter and a very specific one Storage organization including magnetic tape storage has become known, which ended up being over A computer compiles a series of time sequences assigned to different work processes can be. In the case of the previously known recording of working hours, however, there is a; respective display of the Hours of operation of one of the elements since the last maintenance and thus resetting of the register not provided and not possible.

With the device according to the invention, however, can with respect to each element accumulated operating hours since the last maintenance or by reversing to those still possible Operating hours can be recognized for the next necessary maintenance without the need for a computer and a complex program would be necessary. Rather, with the device according to the invention Operator always has an exact picture of the next maintenance due dates of the individual elements and thus also make the work machine lost to work. This in turn creates good ones Requirements for scheduling the procurement of replacement material, such as a new filter, but also oil with regard to the work to be carried out with the machine.

The invention is described below with reference to an exemplary embodiment shown schematically in the drawing explained in more detail, with advantageous refinements and developments also arising. In the Drawings shows

1 shows a schematic block diagram of a device according to the invention and

Fig. 2 shows an embodiment of a Bcdicnungs-

Control panel of the device according to the invention according to FIG. 1.

The drawing shows the application in an oil-flooded screw compressor system as an example an embodiment of a device according to the invention is shown

Before a more detailed explanation of the in F i g. 1 schematically illustrated device is initially for a better understanding of the basic structure as well as the individual elements to be maintained a screw compressor system, including the schematic representation of such a Appendix in the drawing Figure 2 is referred to.

The screw compressor system shown is an air compressor. The air to be compressed flows according to arrow 1 through an intake filter A into the screw compressor 2, in which oil is also injected through a line 3. The air-oil mixture is compressed in a known manner in the working space of the compressor 2, exits through a pressure line 4 and flows into an oil separator 5. In the oil separator 5, the oil is separated from the air-oil mixture as it passes through an oil separator cartridge D , after which the compressed air freed from the oil flows according to arrow 6 to a pressure vessel or directly to the consumer, while the oil is in the oil sump earn the bottom of the Oil separator 5 with an oil level C collects The oil flows continuously from the oil sump E through an oil line 7, a dirt trap F , an oil cooler 8, an oil line 9, an oil filter B and finally through the oil line 3 back to the working chamber of the screw compressor 2 .

As highlighted in the drawing by capital letters, the screw combination shown has ii pressor the following items to be maintained:

A: suction filter (change after 1000 operating hours)

B: Oil filter (change after 1000 operating hours) w

C: Oil level dipstick (check)

D: oil separator cartridge (change after 4000 operating hours)

E: Oil sump 10 liters (change after 4000 operating hours) 4Ί

F; Dirt trap (cleaning after 4000 operating hours)

The maintenance mentioned above must be carried out in the interest of the correct operation of the ">" Screw compressor system to the called way to be carried out.

The device according to the invention is provided for this purpose, the basic structure of which is shown schematically in FIG. The device shown has a continuous operating hours counter 10 which is driven by the power consumption of the compressor drive 11. The operating hours of the compressor system determined by the operating hours counter are continuously sent to a computer device 12, which continuously stores the operating hours for the individual elements A ... F to be serviced since the respective last maintenance. The program of the computer device contains the maximum number of permitted operating hours for the individual elements A ... F, and the computer device 12 continuously compares the respective number of operating hours for the individual elements A ... F with the specified maximum permitted number of operating hours for the individual elements A. ... Fund activates a signaling device for each of the individual elements A ... F after the maintenance intervals have expired. These signaling devices are formed by a plurality of push-button indicator lamps 13 connected to the computer device 12, one of which is assigned to an element A ... F to be serviced and lights up when the maximum permissible number of operating hours of this element A ... F has expired

This indicates to the operator optically (and, if necessary, also acoustically by means of an alarm device 14) that one or more of the elements A ... F must be serviced.

The operator carries out the prescribed maintenance of the element A ... F concerned. It then resets the number of operating hours stored in the computer device 12 for the element A ... F that has just been serviced -neither back to zero. For this purpose, an arrangement is provided which is formed by a contact device 15, which is only accessible to the operator (not shown), and the push-button indicator lamp 13, which is assigned to the relevant element A ... F and is also to be actuated when resetting. The push-button indicator lamp 13 of the element A ... F in question goes out again, and the computer device 12 begins with the ongoing storage of the number of operating hours of this element for a new maintenance interval.

According to a further particularly advantageous feature of the invention, the pushbutton indicator lamps 13 can also fulfill another function. When they are operated during an ongoing maintenance interval, the number of operating hours stored for the individual elements A ... F since the last maintenance are supplied to a visual display device 15, on which a digital display takes place. In this case, the visual display device 16 can display the number of operating hours that has already elapsed for the relevant Eler.ent A ... Firn currently running maintenance interval. The circuit of the device according to the invention can, however, also be designed in such a way that the visual display device 16 shows the number of operating hours still remaining for the relevant item A ... F in the currently running maintenance interval.

Finally, a further visual display device 17 can also be provided, which the Displays the total number of operating hours of the machine system since its installation, but its function can also be taken over by the device 16.

For further illustration, FIG. 2 shows an operating control panel 18 for operating the device according to the invention. On the control panel 18, the push-button indicator lamps 13 for the individual elements A ... F, the key-operated contact device 15 and the visual display device 16, along with associated brief explanations for the operator, are arranged in the lower area. Above this is on the control panel 18 for further illustration for the operator a schematic representation of the screw compressor system to be serviced by the device according to the invention, highlighting the individual screw compressor systems to be serviced

Elements A ... I. This representation has already been described in more detail above.

Finally it should be noted that the computer equipment 12 is always fed with mains power. However, it is for the Fa !! of a Net / a'.isfall Battery operation switchable, so that because of power failure "forgetting" the program input to the computer device 12 is avoided by the latter.

Here / u 2 sheets of drawing

Claims (6)

Patent claims: 1. Device for monitoring complex work machines, such as compressor systems or the like, with a plurality of elements to be serviced according to predetermined operating hours, ζ. As air and / or oil filter, wherein the operating hours of the machine are counted continuously, characterized in that a associated with a plurality of the elements (A ... F) registers via a computer means (12) cooperating, digitally operating hour meter ( 10) is provided, the progression of which takes place depending on the switch-on state of the machine and from which the registers are advanced in parallel, and that display devices (13, 16) are provided which are optionally activated depending on the individual registers if the since the last reset of a register, the counter reading in the register that has accumulated to zero has reached the maximum number of operating hours permitted for the respective element 2. Device according to claim 1, characterized in that that the counting process in the individual registers also exceeds the maximum permissible number of operating hours resumable and the counter value as overflow (time exceeding the maintenance time) A reset can be displayed until the maintenance of the corresponding element has been carried out of the register is carried out from the outside. 3. Apparatus according to claim 2, characterized by one, preferably via a Spezialschlussi releasable locking mechanism for register reset, which iJie reset to zero only allowed after maintenance of the corresponding element of the work machine. 4. Device according to one of claims 1 to 3, characterized in that the contents of each register to display the since the last Resetting to zero (maintenance) elapsed time for display by a visual display is retrievable. 5. Device according to one of claims 1 to 3, characterized in that of the individual Register the rest of the operating hours (period until the next maintenance) at any time is available. 6. Device according to one of claims 1 to 5, characterized in that the power supply and maintenance of the accumulated count values in the operating hours counter and the individual registers in times of mains disconnection or a mains failure, preferably rechargeable supply batteries are provided. ^20th