DE2611437A1 - FILTER ARRANGEMENT FOR HYDRAULIC SYSTEMS - Google Patents

Description

Massey-Ferguson Services NV,
Abraham de Veerstraat 7 a,
Curacao,
Netherlands Antilles

Filter arrangement for hydraulic systems

The invention relates to a filter arrangement for hydraulic systems, usually filters are used in hydraulic systems to hold back contaminants in the hydraulic fluid, the parts of the Could damage the system. Such filters must be replaced at set intervals so that the filter resistance does not increase impermissibly or the effectiveness of the filter subsides.

When replacing the filters, at least some of the hydraulic fluid is usually lost or else the hydraulic fluid must be drained completely before replacement. Both options are fraught with disadvantages, which means that they generally shy away from changing the filter will. This endangers the entire hydraulic system.

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The object of the invention is therefore to avoid these disadvantages and to create a filter arrangement, when changing the filter neither hydraulic fluid if all the liquid is lost, it must be drained off before changing. This is because of this achieved that in a filter assembly for hydraulic Systems with a liquid storage tank on which the supply lines of the hydraulic System and any return lines connected and at least one of these lines with a filter are provided, according to the invention, the filters provided on the respective lines in the collecting container a working position lying below the liquid level in a working position lying above the same Inspection position are pivotably arranged.

Preferably, each of the lines brought up to the collecting container ends in such a filter arrangement. The filters can be rotated or pivoted with the line assigned to them tied together.

Each filter expediently sits on one leg of an L-shaped tube, which is connected to its other Leg is rotatably inserted into the associated line. On the other hand, each filter arrangement includes a filter cartridge that sits interchangeably on the respective pipe limb and a detachable one Fastening members is held.

An embodiment of the invention is described below explained in more detail with reference to the accompanying drawings. Show:

609842 / Q2S9

261U37

Fig. 1 is an overall view of a vehicle with a liquid container next to it the bike;

Fig. 2 is a longitudinal section along the line II-II in Fig. 1 and

Fig. 3 is a view along the line III-III in Fig. 2, partly in section.

In Fig. 1, a conventional loading vehicle 10 is shown, which with a hydraulic fluid container is equipped, which is designated as a whole by 12.

As can be seen from FIG. 2, the container 12 has metal walls 13 with an inspection hatch 14. In addition, a baffle plate 15 is provided which enables the liquid to circulate in the container 12. '

The liquid reaches the container 12 via the supply line 16, to which a filter arrangement 17 is connected is. A filter arrangement 18 is connected to the supply line 19 in a similar manner. As best seen in Figure 3, each of the two filter assemblies includes 17 and 18, respectively an L-shaped curved tube 20, which is inserted with one end into the line 16 or 19 and with a screw 21, which engages in an annular groove 22 on the tube, is secured. An O-ring 23 seals the Connection between pipe 20 and line 16 or 19.

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261U37

A plate 25 is welded to the other leg of the tube 20, against which the tube 20 is positioned surrounding filter element 26 is supported. The filter 26 is held by a on the lower end of the Filters 26 placed removable plate 27, which with a bolt 28 and a wing nut 29 on the pipe 20 is releasably attached. A seal 30 seals the connection between wing nut 29 and the plate 27

The pipe 20, which is connected to the supply line 19 in Connection is provided with a bypass valve 31 through which the liquid in the Line 19 arrives when the resistance of filter 26 becomes too high.

The end plate 27 of each filter 26 is via a chain 3 2 with the wall 13 immediately next to the Inspection plate 14 connected.

During operation, the filter assemblies 17 and 18 are in the lower position, where they Immerse completely in the hydraulic fluid. If the filter element 26 needs to be replaced is, the inspection flap 14 is opened and the filter element by means of the chain 32 around the line 16 or 19 pivoted upwards.

In this position the hydraulic fluid runs out of the filter elements. When they are completely have emptied, the wing nut 29 is unscrewed and the end plate 27 is removed. The filter 26 can then be exchanged for a new one. The plate 27 is then put back on and with the

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Wing nut 29 screwed tight and the filter assembly back in its lower working position lowered.

The rotatable connection between the filter elements and the lines 16 and 19 can also be through a flexible tube 20 can be replaced.

In addition, instead of the chains 32 levers can be used, which are connected to the inspection hatch 14 in Are connected so that opening this flap automatically erects the filter assemblies 17 and 18 entails.

For a better overview, only one filter arrangement is shown in detail. The other is but similar in structure.

With regard to the graphic representations, it should be expressly noted that their disclosure content is the subject matter belongs to the invention, even if the individual elements thereof are not specifically mentioned in the description were treated 1

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Claims (7)

261U37 Patent claims : λ J Filter arrangement for hydraulic systems with a liquid collecting container to which the supply line of the hydraulic system and a return line are connected, at least one of these lines being connected to a filter, characterized in that the filters (17, 18 ) are arranged in the collecting container (12) such that they can be pivoted from a working position below the liquid level into an inspection position above the same. 2. Filter arrangement according to claim 1, characterized in that that the filters (17, 18) are rotatably connected to the line (16, 19) assigned to them. 3. Filter arrangement according to claim 1 and 2, characterized characterized in that the filters (17, 18) on one Legs of an L-shaped tube (20) sit, which is rotatable with its other leg in the associated Line (16 or 19) is used. 4. Filter arrangement according to claim 1 to 3, characterized in that the filter (17, 18) one Filter cartridge (28) which are interchangeably placed on the respective pipe limb (20) and passed through releasable fastening members (27 to 30) is held. 5. Filter arrangement according to claim 1 to 4, characterized characterized in that the liquid collecting container (12) in its ceiling is covered by a lid (14) Has closable inspection opening, to the pulling means (32) for pivoting out the filter arrangement (17, 18) are introduced. 609842/0259 6. Filter arrangement according to claim 5, characterized in that that the inspection flap (14) with the filters (17, 18) by chains, ropes, levers (32) od. Like. Is connected in such a way that when the flap is opened, the filter is swiveled out of the liquid at the same time will. 7. Filter arrangement according to claim 1 to 6, characterized characterized in that each of the individual lines (16, 19) opening into the collecting container (12) has each with its own filter arrangement (17, 18) is provided. 6098 42/0259 Blank page