KR100665522B1 - Oil supply device - Google Patents

Abstract

The present invention relates to an oil supply device for an engine, wherein the engine includes lubricating points capable of supplying lubricating oil and hydraulic units (11, 12) capable of supplying hydraulic oil. Is provided with a common oil reservoir of which one common oil tank 5 is assigned. From the oil tank one feed pipe 6 branching out from one branch point 13 into one branch 6a assigned to the lubricating oil and one branch 6b assigned to the hydraulic oil exits and into the oil tank. The whole leaking oil and / or the returning oil are recovered using at least one return line 7, and at the same time one filter set is arranged in the upper flow direction of the branch point 13 in the supply line 6. (26) is provided. In the case of such an oil supply device, a simple and compact configuration is achieved by including the filter device only 26 in the feed pipe 6 and the filter set 26 arranged in front of the branch point 13, wherein the filter set is It includes a number of filter units 28, 29 with different meshes adapted to the required quality of the hydraulic fluid.

Oil supply, lubricating oil, filter, engine

Description

Oil supply device

1 is a system configuration diagram of an oil supply device of the present invention applied to a two-stroke marine diesel engine equipped with an oil supply device of the present invention.

 ** Description of the symbols for the main parts of the drawings **

1: piston engine 2: screw

4: oil pan 5: oil tank

6: supply pipe 6a: lubricating oil branch

6b: working oil branch 7: recovery pipe

11: injection nozzle 12: piston device

13: branch point 14: separation engine

15: pump set 18: discharge pipe

26: filter set 28, 29: filter unit

30: separator

The present invention relates to an oil supply device for an engine, in particular for a piston engine. The piston engine is preferably in the form of a large diesel engine having lubricating points capable of supplying lubricating oil and hydraulic units capable of supplying hydraulic oil, while at the same time storing one common oil for lubricating oil and working oil. Oil storage is provided, and the oil reservoir is assigned one common oil tank, from which the oil tank branches into one branch assigned to the lubricating oil and one branch assigned to the working oil. The supply pipe is extended and all leaking oil and / or recovered oil is recovered by using at least one return pipe into the oil tank, and at the same time the filter device is disposed in the supply pipe at the upper flow direction of the branch point. One filter set is provided.

An oil supply of this type is disclosed from DE 196 19 843 C2. In the case of the known device the filter device comprises two filter sets, one of which is arranged in front of the branch point and the other in the working oil branch of the supply pipe behind the branch point. This proves to be very expensive because not only does each filter set require two complete filter elements in the form of a main filter and an auxiliary filter, but each activates the desired filter element and This is because it requires one bypass device assigned to the filter elements to passivate another filter element, respectively.

It is therefore an object of the present invention to provide an oil feeder of the type mentioned above which is relatively simple and inexpensively constructed from the above points and which nevertheless provides the desired oil quality.

The object is that, according to the present invention, the filter device only comprises a filter set comprising a plurality of filter units which are arranged in the feed pipe and in front of the branch point and which have different meshes adapted to the required quality of the working oil. It is solved by including it.

Since the filter device according to the invention comprises only one filter set, it is advantageously possible to reduce the total cost previously required for the second filter set. Since the one filter set includes a plurality of filter units having different meshes adapted to the desired hydraulic oil quality, the oil to be filtered is thus maintained in a percentage purity suitable for the hydraulic unit used. It is therefore possible to omit one set of filters in the hydraulic branch without any problem, thereby advantageously reducing all costs associated with it, as already mentioned. Since the oil volume flow through the filter set according to the invention first branches into the lubricating oil branch and the operating oil branch in the lower flow direction of the filter set according to the invention, the lubricating oil preferably has the same quality as the working oil. This point preferably affects lubrication. Since the filter set according to the present invention comprises a plurality of filter units having different meshes, it is preferable not only to filter a very large amount of contaminating particles while using the filter set according to the present invention, but also to relatively less pollution. The required amount of particles can also be filtered. In this regard, the purity stage of the oil can be maintained as well as improved compared to the initial stage.

Improvements suitable for the preferred embodiment and purpose of the measures are set forth in the dependent claims of the claims. As in the dependent claims, the filter station according to the invention may suitably comprise a plurality of filter chambers, each of which comprises a plurality of filter units, and at the same time all filter units of the same filter chamber. Have the same mesh and filter units of different meshes are assigned to different filter chambers. These measures achieve particularly simple and compact configurations. In addition, by doing so, it is possible to easily reset known devices in the manner according to the invention. In this regard, a corresponding quantity of filter strainers, each containing only one filter chamber, is exchanged.

In the case of a two-stroke large diesel engine in the form of a ship engine, the filter set according to the present invention has a fine filter unit having a mesh of up to 10υ, preferably a mesh of up to 34υ and a mesh of up to 34υ, preferably 34υ. If the branch includes coarser filter units, excellent results are achieved. In this respect, for purposes suitable, the filter size is passed through filter units in which 3-15%, preferably approximately 10%, of the volumetric oil volume flowing through the filter set is assigned to less mesh and the remainder to the coarser mesh. Select to pass through the assigned filter units. This allows for a compact construction and provides good oil quality.

As a measure suitable for further purposes, all filter units of the filter set according to the invention may be formed as a dirt-backflushing automatic cleaning filter. This preferably allows a long maintenance rate and thereby guarantees low maintenance costs.

In a further refinement of the above measures, a safety screen with a larger mesh, in fact a larger screen hole size, of the filter units of the filter set according to the invention within the starting area of the hydraulic oil branch disposed behind the branch point. (safety screen) may be provided. These safety screens do not act as a filtration but ensure that very large contaminant particles are not inserted into the hydraulic system, which may cause problems upon restart if the entire system is broken.

Further preferred embodiments and refinements suitable for the purpose are presented in the dependent claims of the remainder of the claims, and can be seen in more detail from the following description according to the drawings.

Large engines of the type herein include many engines supplied with lubricating oil for lubrication and / or cooling. Therefore, many bearings are supplied with lubricating oil, for example using lubricating oil pipes not shown in more detail. Large engines of the type herein are also provided with engines operable using hydraulic devices. As an example, one cylinder piston device 12 and one injection nozzle 11 which are assigned to the exhaust gas-exhaust valve are shown. The hydraulic devices are supplied with hydraulic oil containing the required pressure.

A common oil reservoir is provided in the common oil supply system for lubricating oils at the lubrication points and hydraulic oil in the hydraulic units, and the lubricant and hydraulic oil are discharged from the oil reservoir. In this connection one common oil tank 5 is provided, from which one feed tube 6 extends and the return tube 7 is opened into the oil tank. The supply pipe 6 is divided into two branches at one branch point 13, that is, one lubricant branch 6a assigned to the lubrication points and a hydraulic oil branch 6b assigned to the hydraulic units. The branch point 13 is assigned an adjustable volume dividing organ 14.

The leaking oil from the lubricating points and the returning oil from the hydraulic units are still integrated in the area of the piston engine 1 and are recovered together into the oil tank 5. The leaking oil falling from the lubrication point is collected in an oil pan 4 which is formed in the bottom side region of the crankcase of the piston engine 1. In addition, the recovery oil generated from the hydraulic unit flows into the oil pan 4 through which the recovery pipe 7 extends, as shown in the figure. This provides for a closed oil circulation.

One pump set is provided in the region of the feed duct 6 extending from the oil tank 5. The pump set includes two parallel connected low pressure pumps with assigned drive motors. The two low pressure pumps function as alternatingly operated main pumps and auxiliary pumps. The oil pressure that can be generated using the pump is chosen so that the lubrication points can be supplied in a reliable manner. One cooling device 9 is arranged at the rear of the pump set 8. In the hydraulic oil branch 6b, one further pump set 15 is provided, which in turn contains a plurality of high pressure pumps which function as main pumps and auxiliary pumps. At the same time the main pumps can be driven directly from the piston engine 1 at this point, and the auxiliary pumps are assigned their own drive motors. The low pressure pumps of the pump set 8 mentioned above serve as preparation pumps in connection with the high pressure pumps of the pump set 15, whereby the high pressure pumps are always charged in a reliable manner.

Industrial oils contain some number of contaminating particles of different sizes. Depending on the number and size of contaminating particles present, different quality steps are produced, for example by ISO standards. The oil used in the illustrated embodiment corresponds to ISO standard 4406. Within these standards are different purity steps, identified with different codes, for example, indicated by ISO _xx 19/16. In this regard, for example, at least 2v of 250,000 to 500,000 contaminants and at least 15v of 32,000 to 64,000 contaminants should be present in one 100 ml sample. The above oils are very suitable for the hydraulic unit of this example and in addition have excellent lubricating properties.

One filter arrangement is provided for removing a specified number of different sized particles from the oil per unit of time in order to maintain or further improve the purity level during operation. Only one filter set 26 is provided in the feed tube 6 which is arranged above the flow direction of the branch point 13 in order to form the filter device. In contrast, the lubricating oil branches 6a to hydraulic oil branches 6b formed in the flow direction lower portion of the branch point 13 are not provided with a filter. Only in the starting area of the hydraulic oil branch 6b there is provided a safety screen 27, which is formed by the screen wall or the like, in which case very large particles of hydraulic oil are lost if the oil supply system breaks through the safety screen. Further passage into branch 6b is impeded.

The filter set 26 includes a plurality of filter units 28, 29 having different meshes adapted to the desired quality of the hydraulic fluid. Only two filter units 28, 29 are shown in the figure to simplify the scheme. The two filter units are assigned to different meshes. In practice, a plurality of such filter units are generally provided for each mesh. Filter unit 28 is assigned to fewer meshes and filter unit 29 is assigned to a larger mesh in the illustrated example. In this respect, fewer meshes are selected adapted to the particle size identified by the first code number, and larger meshes are selected adapted to the particle size identified by the second code number. In an application of the type herein, where appropriate, filter units 28 assigned to less mesh are perfused by fewer particles of the total oil volume flow and filter units 29 assigned to larger mesh. ) Is when perfused by larger particles. These points are represented by different size ratios in the figures.

For large diesel engines of the type herein, the less mesh assigned to the filter units shown by filter unit 28 is up to 10v, preferably exactly 10v. The larger mesh assigned to the filter units shown by filter unit 29 is up to 34v, preferably exactly 34v. In this respect, the total size of the filter units 28 and 29, which are present respectively, means that 3-15%, preferably 10%, of the total oil volume flow rate is less than 10 mesh, preferably exactly 10 mesh. The branches pass through the filter units 28, and the remainder of the total oil volume flow rate is selected to pass through the filter units 29 having a larger mesh up to 34v, preferably a mesh of exactly 34v. With the above filter set, the aforementioned purity level ISO _xx 19/16 is maintained or further improved in continuous operation. The size of the screen aperture of the safety screen 27 is generally larger than the larger mesh of 34v herein and is preferably at least 5 times larger.

The filter set 26 includes a plurality of filter chambers suitably for the purpose, and at the same time a plurality of filter cartridges are arranged in each filter chamber to form one filter unit each named 28 and 29 herein. There may be. In order to achieve a very compact configuration, all filter cartridges of one chamber each have the same mesh, suitably for the purpose. The total number and size of existing filter cartridges each having the same mesh is adapted to the desired flow rate mentioned above. In this regard, for fewer meshes, larger filtering surfaces should be used than for larger meshes.

The filter units 28 with fewer meshes are suitably shaped in the cross section, suitably for the purpose, whereby a filtering surface of the desired size is achieved using relatively few filter units. In contrast, filter units assigned to larger meshes may be circular in cross section. In the example shown, the filtering surface assigned to less mesh amounts to approximately 33,600 cm 2. This surface is achieved using two filter chambers with seven filter units 28 each having a star cross section, which provides a compact configuration. The filtering surface assigned to the larger mesh amounts to approximately 20,577 cm 2. In this case, three filter chambers with 19 circular filter units 29 each are sufficient.

Therefore, in the hypothetical example, two + three, that is, five filter chambers are usually used. Nevertheless, the filter set 26 comprises at least five, preferably six filter chambers as a whole, as appropriate for the purpose. In this regard the filter chambers of the remaining chambers or chambers can be cleaned during the normal filtering operation of the remaining chambers. This cleaning step takes place from the chamber to the chamber in a period of approximately one hour. During the cleaning of the filter units 28 assigned to fewer meshes each assigned filter chamber is immobilized and replaced by a filter chamber with filter units 29 assigned to the larger mesh during the cleaning time associated therewith. . However, this condition is not a steady state condition, but only for a smaller portion, and here only for 2/5 of the total operating time, thus ensuring the desired oil quality.

All filter units 28, 29 of filter set 26 are formed as self-cleaning filters. In the above units, a backwashing device, not shown in more detail, is assigned to backwash the accumulated foreign matter. Oil sludge generated during backwash is discharged from the filter set 26. In this regard, one set of sludge outlets is provided in the filter set, and one outlet pipe 18 is connected to the outlet. One separator 30 is disposed at the rear of the discharge pipe, and the oil sludge is separated into clean oil and pollutants through the separator. The clean oil is sent into the oil tank 5, as shown by one feed fitting. The contaminants are fed to an oil collecting trough 23 through one outlet.

The separator 30 is designed as a centrifuge suitably for the purpose, and includes a pipeline strainer in which the pump is disposed in front. The suction port of the pump is connected to a suction pipe protruding into the oil tank on the one hand and to the discharge tank 31 on the other hand using one switching device 24, and into the discharge tank 31. 18) is open. As long as there is sufficient oil sludge, the suction pipe protruding into the oil tank 5 is immobilized, so that only oil sludge is sucked in. As soon as the discharge tank 31 assigned to the discharge pipe 18 is emptied, the oil is sucked in.

According to the invention, this prevents the drying of the pump of the separator 30 and at the same time the contents of the oil tank 5 using the separator 30 also continue to separate into contaminants and clean oil, which is why this is a filter device. Reduce the load on.

As described above, the present invention has been described only for the preferred embodiments, but it is apparent to those skilled in the art that various modifications and changes can be made within the scope of the present invention based on the above embodiments. It is obvious that modifications and variations belong to the appended claims.

Claims (16)

An oil supply device for a piston engine such as a two-stroke large diesel engine in the form of a marine engine, the piston engine having a lubrication point capable of supplying lubrication oil and a large hydraulic unit (11, 12) capable of supplying hydraulic oil. It is in the form of a diesel engine 1 and at the same time one common oil reservoir is provided for the lubricating oil and the hydraulic oil, and the oil reservoir is assigned one common oil tank 5. At the branch point 13 one supply pipe 6 is branched out which branches into one branch 6a assigned to the lubricating oil and one branch 6b assigned to the working oil, and into the oil tank the entire leaking oil and / or Alternatively, the recovered oil may be recovered using at least one recovery pipe 7, and at the same time, one filter device may be disposed above the flow direction of the branch point 13 in the supply pipe 6. In the oil supply unit of a large diesel engine with my filter set 26 are provided, The filter device comprises only said filter set 26, which is arranged in the feed pipe 6 and in front of the branch point 13, the filter set having a plurality of different meshes adapted to the required quality of the hydraulic fluid. Comprising filter units 28, 29, the filter set 26 of a large engine comprises a plurality of filter chambers, each of which comprises a plurality of filter units 28-29. And at the same time all filter units (28-29) of the same filter chamber each have the same mesh and the filter units (28-29) of the different filter chambers have different meshes. delete The method of claim 1, The filter units (28) are provided with up to 10 meshes, and the filter units (29) are provided with meshes up to 34υ. The method of claim 3, In a large diesel engine, the oil supply of a large engine is characterized in that the small mesh assigned to the filter units (28) is 10 v and the large mesh assigned to the filter units (29) is 34 n. The method according to any one of claims 1, 3 and 4, Filter set 26 is characterized in that the oil flow of filter units 28 assigned to fewer meshes is configured to be less than the oil flow of filter units 29 assigned to larger meshes. Oil supply. The method of claim 5, The filter set 26 is configured such that the oil flow of the filter units 28 assigned to fewer meshes is 3-15% of the total oil flow of the filter set 26. Oil supply. The method of claim 6, Oil supply of a large engine, characterized in that the oil flow of the filter units (28) assigned to less mesh is configured to be 10% of the total oil flow of the filter set (26). The method according to any one of claims 1, 3 and 4, The oil supply of a large engine, characterized in that the filter units (28) assigned to fewer meshes have a star cross section. The method according to any one of claims 1, 3 and 4, The oil supply of a large engine, characterized in that the filter units (29) assigned to the larger mesh have a circular cross section. The method according to any one of claims 1, 3 and 4, Oil filter of a large engine, characterized in that all filter units (28, 29) of the filter set (26) are formed as self-cleaning filters. The method of claim 10, An oil supply device for a large engine, characterized in that the filter set (26) is provided with one separation device (30) for separating oil sludge generated during cleaning into clean oil and contaminants. The method according to any one of claims 1, 3 and 4, The filter set 26 comprises at least one filter chamber, characterized in that the filter units 28 to 29 of the filter chambers are alternately cleaned with the filter units 28 to 29 of the remaining filter chambers. Oil supply for large engines. The method of claim 12, Cleaning of the filter units (28 to 29) of each one of the filter chambers is carried out alternately while moving from the filter chamber to the filter chamber at an interval of one hour. The method according to any one of claims 1, 3 and 4, The branching point (13) is an oil supply device for a large engine, characterized in that one adjustable volume flow separator (14) is provided. The method according to any one of claims 1, 3 and 4, In the inlet region of the hydraulic oil branch 6b there is provided one safety screen 27 with a larger screen hole size for the larger mesh of the filter unit 29 of the filter set 26. Oil supply for large engines. The method of claim 15, The oil supply of a large engine, characterized in that the screen hole size of the safety screen (27) is at least five times larger than the larger mesh of the filter unit (29) of the filter set (26).

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