SE541638C2

SE541638C2 - Vibration damper for liner processing machine

Info

Publication number: SE541638C2
Application number: SE1850025A
Authority: SE
Inventors: Frank Lundahl; Mats Pranter
Original assignee: Chris Marine Ab
Priority date: 2018-01-09
Filing date: 2018-01-09
Publication date: 2019-11-19
Also published as: SE1850025A1; WO2019137697A1

Abstract

The invention relates to a liner processing device (1) for maintenance of a cylinder liner (2). The liner processing device (1) comprises a spindle (3) extending in a first direction (D), at least three arms (4) connected to the spindle (3) and extending in a second direction (D) substantially perpendicular from the first direction (D), each arm (4) comprising a cutting material (6) arranged on an outer end thereof, and a stabilizing device (7) connecting the at least three (4) arms to each other. The invention also relates to the use of the liner processing device (1) for maintenance of a cylinder liner (2).

Description

VIBRATION DAMPER FOR LINER PROCESSING MACHINE Technical field The invention relates to a liner processing device for maintenance of a cylinder liner and the use of the liner processing device.

Background art In order to optimise the operational conditions of internal combustion engines and to prevent shutdowns to the largest extent possible, the operational state of the engines is checked at regular intervals. One common cause for impaired engine state or for shutdowns is that the piston rings have become worn-out or burnt and consequently need to be replaced. Experience has shown, however, that the cause may equally well be the cylinder liners which, when examined, have been found to be in a worn state or to no longer exhibit a desired surface because of depositions of soot or of abrasive or corrosive attacks on the cylinder liner walls.

Attacks of this kind might be due to sulphurous fuel used to operate the engine, which in combination with steam produces sulphuric acid that condenses at predetermined temperature and pressure levels in the engine. The effects on the cylinder liner from for example corrosion attacks are localised because of the uneven distribution of cylinder oil, of gas leakage via openings, such as passages between piston rings and cylinder liner, and/or variations of the cylinder liner wall temperature.

Cylinder liner checks are therefore extremely important to determine whether the heat stress or other damage, to which the cylinder liner has been exposed has caused the liner to deform, resulting in the liner adopting an oval shape or a trumpet shape with a larger diameter in the top section. If any defects or deviations in the cylinder liner is detected it is vital to alleviate the same as soon as possible.

When maintenance of the cylinder liner is necessary it is conventional to use a liner processing device that is lowered into the cylinder liner by means of a wire such that the inner surface of the same can be processed. A problem that might arise during such a process is that the liner processing starts to vibrate due to the pressure applied towards the inner surface of the cylinder liner. Such vibrations could damage the cutting material of the liner processing device as well as the inner surface of the cylinder liner.

Summary of the invention It is an objective of the present invention to provide an improvement of the above technique and prior art. More particularly, it is an objective of this invention to provide an improved liner processing device for maintenance of a cylinder liner.

According to a first aspect, these and other objects, and/or advantages that will be apparent from the following description of embodiments, are achieved, in full or at least in part, by a liner processing device for maintenance of a cylinder liner. The liner processing device comprises a spindle extending in a first direction, at least three arms connected to the spindle and extending in a second direction substantially perpendicular from the first direction, each arm comprising a cutting material arranged on an outer end thereof, and a stabilizing device connecting the at least three arms to each other.

This is advantageous in that the stabilizing device will connect the arms to each other and thereby neutralize the vibrations of the liner processing device that might occur during processing of the cylinder liner. A further advantage is a decrease in processing time since the stabilizing device enables a higher cutting pressure against the cylinder wall.

The first direction may correspond with the axial direction of the cylinder liner to be processed when the liner processing device is placed therein.

The second direction may correspond with the radial direction of the cylinder liner to be processed when the liner processing device is placed therein.

The at least three arms may be extendable in the second direction in order to align with the cylinder liner to be processed.

Each one of the at least three arms may comprise at least two arm racks extending between the spindle and the cutting material.

The cutting materials may extend substantially in the first direction. The stabilizing device may comprise support rods extending between the at least three arms thereby connected them to each other.

Each support rod may be disposed between an outer end of two sets of the arms.

The stabilizing device may comprise support rods extending between the cutting materials of the at least three arms thereby connected them to each other.

The support rods may be arranged substantially in the same plane, which plane extends in the second direction.

The support rods may be inclined.

The at least two support rods of the stabilizing device may be extendable.

The liner processing device may further comprise a holder configured to hold the cutting material for processing of the cylinder liner.

According to a second aspect, these and other objects are achieved, in full or at least in part, by the use of the liner processing device according to the features above for maintenance of a cylinder liner.

Effects and features of the second and third aspect of the present invention are largely analogous to those described above in connection with the first aspect of the inventive concept. Embodiments mentioned in relation to the first aspect of the present invention are largely compatible with the further aspects of the invention.

Other objectives, features and advantages of the present invention will appear from the following detailed disclosure, from the attached claims, as well as from the drawings. It is noted that the invention relates to all possible combinations of features.

Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to “a/an/the [element, device, component, means, step, etc.]” are to be interpreted openly as referring to at least one instance of said element, device, component, means, step, etc., unless explicitly stated otherwise.

As used herein, the term “comprising” and variations of that term are not intended to exclude other additives, components, integers or steps.

Brief description of the drawings The above, as well as additional objects, features and advantages of the present invention, will be better understood through the following illustrative and non-limiting detailed description of embodiments of the present invention, with reference to the appended drawings, where the same reference numerals may be used for similar elements, and wherein: Fig. 1 is a perspective view of a liner processing device according to one exemplary embodiment of a first aspect of the invention.

Fig. 2 is a perspective view of the liner processing device according to another exemplary embodiment of the first aspect of the invention.

Fig. 3 is a perspective view of the liner processing device according to another exemplary embodiment of the first aspect of the invention.

Fig. 4 is a perspective view of the liner processing device according to another exemplary embodiment of the first aspect of the invention.

Fig. 5 is a perspective view of the liner processing device according to another exemplary embodiment of the first aspect of the invention.

Detailed description of preferred embodiments of the invention Fig. 1 illustrates a liner processing device 1 according to one exemplary embodiment of a first aspect of the invention. The liner processing device 1 is especially adapted for maintenance of a cylinder liner 2.

In Fig. 2, the liner processing device 1 is illustrated in greater detail. The liner processing device 1 comprises a spindle 3 extending in a first direction Di and three arms 4 connected to the spindle 3 and extending in a second direction D2substantially perpendicular from the first direction Di. Each arm 4 is equipped with a holder 5 which holds a cutting material 6 for processing of the cylinder liner 2. Both the holder 5 and the cutting material 6 extend in the first direction. The liner processing device 1 further comprises a stabilizing device 7 which connects the arms 4 with each other.

The first direction Di substantially corresponds with the axial direction of the cylinder liner 2 to be processed when the liner processing device 1 is placed therein, and the second direction D2substantially corresponds with the radial direction of the cylinder liner 2 to be processed when the liner processing device is placed therein.

In this specific embodiment, the stabilizing device 7 comprises six support rods 8, three upper support rods and three lower support rods. Each one of the support rods 8 is disposed between an outer end of two sets of the holders 5. The upper support rods are arranged on top of the holders 5 in the same plane, which extend in the second direction D2, and the lower support rods are arranged in the bottom of the holders 5 in the same plane, which also extend in the second direction D2.

Fig. 3 illustrates another embodiment of the liner processing device 1. In this embodiment, the liner processing device 1 comprises four arms 4. The arms 4 are extendable in the second direction in order to align with the cylinder liner 2 to be processed. Each arm 4 is equipped with a holder 5 which holds a cutting material 6 for processing of the cylinder liner 2. Here, each arm 4 comprises two arm racks 9 which extend between the spindle 3 and the holder 5. Both the holder 5 and the cutting material 6 extend in the first direction. The liner processing device 1 further comprises a stabilizing device 7 which connects the arms 4 with each other.

Here, the stabilizing device 7 comprises four support rods 8. Each one of the support rods 8 is disposed between a midpoint of two sets of the holders 5. The support rods are extendable and arranged substantially in the same plane which extend in the second direction D2.

Fig. 4 and Fig. 5 illustrate further embodiments of the liner processing device 1. These embodiments correspond to the embodiment illustrated in Fig. 3 and described above. However, here, the support rods 8 are inclined. The support rods extend either from the bottom of one holder 5 to the top of an adjacent holder 5, or from the top of one holder 5 to the bottom of an adjacent holder 5.

The invention has mainly been described above with reference to a few embodiments. However, as is readily appreciated by a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the invention, as defined by the appended patent claims.

For instance, each holder 5 may also include a fastening arrangement which is connected to the arm 4.

The support rods 8 may extend between the arms 4, between the holders 5, between the cutting materials 6, or between the fastening arrangements of the holders 5. A combination of the above is also possible. The support rods 8 may be arranged between two sets of the above on at the top, at the middle, or at the bottom thereof.

The arm racks 9 may extend between the spindle 3 and the holder 5 or the cutting material 6 directly. They may, for example, be linearly arranged in relation to each other in the first direction D1.

Claims

1. A liner processing device (1) for maintenance of a cylinder liner (2), comprising: a spindle (3) extending in a first direction (D1), at least three arms (4) connected to the spindle (3) and extending in a second direction (D2) substantially perpendicular from the first direction(D1), each arm (4) comprising a cutting material (6) arranged on an outer end thereof, and a stabilizing device (7) connecting the at least three arms (4) to each other.

2. The liner processing device (1) according to claim 1, wherein the first direction (D1) substantially corresponds with the axial direction of the cylinder liner (2) to be processed when the liner processing device (1) is placed therein.

3. The liner processing device (1) according to claim 1 or 2, wherein the second direction substantially corresponds with the radial direction of the cylinder liner (2) to be processed when the liner processing device (1) is placed therein.

4. The liner processing device (1) according to any one of the preceding claims, wherein the at least three arms (4) are extendable in the second direction (D2) in order to align with the cylinder liner (2) to be processed.

5. The liner processing device (1) according to any one of the preceding claims, wherein each one of the at least three arms (4) comprise at least two arm racks (9) extending between the spindle (3) and the cutting material (6).

6. The liner processing device (1) according to any one of the preceding claims, wherein the cutting materials (6) extend in the first direction (D1).

7. The liner processing device (1) according to any one of the preceding claims, wherein the stabilizing device (7) comprises support rods (8) extending between the at least three arms (4) thereby connected them to each other.

8. The liner processing device (1) according to claim 7, wherein each support rod (8) is disposed between an outer end of two sets of the arms (4).

9. The liner processing device (1) according to any one of the claims 1 to 6, wherein the stabilizing device (7) comprises support rods (8) extending between the cutting material (6) of the at least three arms (4) thereby connected them to each other.

10. The liner processing device (1) according to any one of the claims 7 to 9, wherein the support rods (8) are arranged substantially in the same plane, the plane extending in the second direction (D2).

11.The liner processing device (1) according to any one of the claims 7 to 9, wherein the support rods (8) are inclined.

12. The liner processing device (1) according to any one of the claims 7 to 11, wherein the support rods (8) of the stabilizing device (7) are extendable.

13. The liner processing device (1) according to any one of the preceding claims, further comprising a holder (5) configured to hold the cutting material (6) for processing of the cylinder liner (2).

14. Use of a liner processing device (1) according to any one of the claims 1 to 13 for maintenance of a cylinder liner (2).