DK142003B - Oil scraper for packing boxes. - Google Patents

Description

/ «Fen i m i (11) PUBLICATION 142003 VES 'DENMARK re') int.ci.3 f ie j a / zo f (21) Application No. 37 ^ 7 / ^ 4- (22) Filed on 12 Jul. 197 ^ · (23) Race day 12 Jul. 197 ^ (44) The application submitted and the writ of publication published on t- · & Ug. 1 ζ) οΟ

Dl THE RECTORATE FOR.

PATENT AND TRADE MARKET (30) Priority requested from it

Jul 13 1973, 33 ^ 2 / 73a GB

(71) HENNING PETER CORNELIUS, Liden GunversveJ 1, Mølholm, Vejle, DK.

(72) Inventor: Same.

(74) Plenipotentiary in the proceedings:

Patent Engineer K. Skøtt »Jens en .________ (54) Scraper for packing boxes.

The present invention relates to an oil scraper of the kind set forth in the preamble of claim 1. Generally, such rings consist of a strong base ring of cast iron which is segmented to facilitate its mounting around a piston rod and in which retainer grooves are relatively mounted. thin metal scraping lamellae which are pressed against the piston rod when the base ring is tightened with a spring. The scraper blades are inserted with a slight sliding fit in the holder grooves, so that after wear, they are easy to replace with new blades or slats.

In order to show a good scraping effect, the slats should be quite thin, preferably 1.5-2.5 mm, as well as should be firmly held in the holders, ie. precisely with light or moderately tight sliding fit. To be able to wear for a long time, the slats should protrude far from the base ring, 5 but due to their small thickness they can in fact only protrude a few millimeters, which also gives a reasonably long life. However, the width or wear of the slats protruding from the foundation ring is also limited by the fact that one does not want too large a gap between the neighboring segments, in order to utilize a large wear-down width of the slats, a correspondingly large initial gap must be used, thus that the ring can constantly snap around the piston rod during the wear. The neighboring segments must not collide before with total wear of the 15 protruding lamellar edges, as the ring after the impact can no longer exert an elastic pressure on the rod surface.

Wide initial gaps between the segments are undesirable because at the gaps there is passage along the rod surface in the axial direction, so that the oil scraping is not effective at these locations, and therefore the selectable slab width is usually chosen to be less than the maximum possible. thereby reducing the width of the gaps.

The invention has for its object to provide an oil scraper in which one can work with a relatively large effective slab width without the mentioned disadvantage with regard to inefficient scraping at the gaps between the segments.

This is achieved according to the invention in that the ring is arranged as defined in the characterizing part of claim 1. Since the gaps between the slat segments in one holder groove 30 will be positioned offset for the gaps between the segments in the other groove, the scraping will be effective everywhere, regardless of the that there may be relatively wide gaps between the segments, which last just means that a relatively large, degradable width of the slats 35 can be used and a significant increase in the life of the slats can be obtained, e.g. by 50%. The said stop lugs facilitate their proper placement of the slat segments at their 3 U2 * 03 position and counteract that the segments could possibly shift in their circumferential direction thereby causing the respective gaps to flow axially. As stated in claim 2, it is achieved that the 5 different segments are easy to assemble around the piston rod, because the individual stop knobs on the foundation ring segments will determine a correct mutual position of the laurel segments in the different foundation ring segments. In practice, it appears that the embodiment 10 of claim 3 is particularly suitable for obtaining a light assembly of the ring.

The invention is explained in greater detail below with reference to the drawing, which shows in perspective and partly in section a ring according to the invention, one segment of dexm · 15 being shown fully drawn while the others are shown punctured.

The ring shown consists of three segments 2, each with an outer base ring segment 4, in the outward side of which is formed a groove 6 for receiving an annular, unscrewed spring, which in the usual way serves to keep the segments pressed against the rod surface, they: ver. X the inwardly facing surface of the slotted base ring 4 is formed an upper and a lower, circumferential support groove 8 and 10, in each of which, with a sliding fit, an outer edge area of a ring lamella 12 and 14 is formed, which, like the base ring, is divided in three segments of 120a and here its inner edge portion protrudes in front of the surface of the foundation ring.

However, each lamella segment is disposed offset of the associated primer segment, the two lamellar segments projecting 15 ° outside, respectively, one and the other end of the primer segment. At least one, but preferably all, primer segments are formed with a stop cam 16 in each of the retainer grooves 8 and 10, these bosses being bent at the respective ends of the slat segments opposite their protruding ends.

4 142003

In assembling the ring around the piston rod not shown in a ship diesel engine, the slat segments are brought into place in the base ring segments and the assembled ring segments thus assembled, the projecting ends of the 5 slat segments being received at the free ends of the holder grooves in the neighboring segments. The assembled ring is provided with said clamping spring and is otherwise held in the usual manner in a seat groove in a surrounding packing box which is assembled around the ring.

10 As explained, the gaps between the neighboring segments can be relatively wide without scraping becoming less effective, and similarly, the scraping lamellae can project relatively far from the foundation ring without the segments collapsing even after partial wear as the gaps narrow. The stop lugs 16 take up space between the segment ends, which is why you can choose to make the slat segments a little shorter than 120 °. it will be possible to allow the stop lugs to engage with recesses or notches in the outer edge of the slat segments 20, whereby the ends of these can be placed very close together at full wear.

With proper placement of the stop lugs 16, the slat segments can be mounted protruding from the same end of the base ring segment, albeit still set apart. In 25 rings where the slat segments are retained with tight sliding fit so as not to bend in the circumferential direction during use, the segments of one scraper blade can be aligned with the foundation segment, without the use of stop lugs in the associated holder groove while a stop or guide cam in the second support groove determines a continued placement of the segments in the second scraper plate.

In rings with such semi-tightly mounted lamella segments, it is possible to choose to mount these segments in a conventional manner, ie. flush with the base ring segments and use an additional or third support groove 22 in which

Claims (3)

142003 5 lamella pieces 24 which bridge the gaps between the other segments. These slats 24 may be shorter than the other slab segments and are preferably disposed between stop or guide knobs 26 in the groove sections 5 22. For draining of the scraped oil, the base ring segments may be formed with radial drain holes 20 behind the scraper slab segments used. PATENT REQUIREMENTS: An oil scraper for packing boxes for piston rods and corresponding machine elements, comprising a segmental base ring (4), which is intended to be stored in a packing box with its segments elastically pressed against the rod surface against which the ring is to scrape, which base ring in its inner cylindrical surface is formed with at least two circumferentially spaced apart spacers (8, 10, 22) in each of which are loosely inserted the outer edge region of an annular similarly segmented scraper lamella (12, 14) opposite; inner edge protrudes in front of the surface of the base ring and thus constitutes an oil-20 scratching edge, which slat segments are interchangeably inserted into the holder grooves, characterized in that the base ring is formed with stop lugs (16, 26) which project into the holder grooves and cooperate with at least some of the the slat segments for limiting their displaceability in their circumferential direction, and the slat segments are arranged so that a scraper along the entire circumference of the rod surface. Oil scraping according to claim 1, characterized in that one stop cam (16) is formed in each holding groove (8, 10) in each base ring segment. An oil scraper according to claim 2, and with two holding grooves