DE1059240B - Piston engine - Google Patents

Description

GERMAN

kl. 46 c ⁴ 4

INTERNAT. KL. F 02 f

PATENT OFFICE

S50777Ia / 46c ⁴

REGISTRATION DATE: OCTOBER 5, 1956

NOTICE
DEH REGISTRATION
AND ISSUE OF THE
EXECUTION: JUNE 11, 1959

The invention relates to a piston machine, the piston of which is cooled by a means that by Telescopic lines are fed and discharged, as well as those with a cross head provided piston rod with glands sealed are passed through a partition, which separates the cylinder space below the piston from the crankcase.

In the case of piston maschineii of this type Difficulties in particular when the coolant is not oil, but water or even sea water or z. B. Freon is used. The sealing of the telescopic tubes, which are plugged into one another, can be carried out in practice Never keep operation so tight that the sealing glands do not more or less Coolant passes through as a leak. Also the connection points of the telescopic tubes with the coolant lines are sensitive and can easily be affected by the vibrations when the machine is running leak. This is better known through the seals of the telescopic tubes and the other leaks Leakage passing through machines can get into the crankcase and spoil the lubricating oil there, resulting in a reduction in smeariness and can even result in dangerous corrosion under certain circumstances.

The invention provides a way to avoid these difficulties. Sk is that the Coolant lines passed through the crankcase in a chamber adjoining the partition which is sealed against the crankcase test.

It is advisable to keep the pressure in the cylinder space below the piston higher than that pressure prevailing in the chamber, which causes the stuffing boxes that seal the telescopic tubes there is a pressure drop directed towards the chamber.

It is advisable to provide the chamber with an opening that communicates with the outside air stands and through which the connecting lines for the coolant are passed.

It is also recommended that the chamber with at least one outflow device for drainage Provide leakage.

By these measures it is achieved that it is now prevented that a leakage of the stuffing boxes the coolant line enters the crankcase. Rather, the leakage is caught in the chamber and can easily be discharged to the outside from there without coming into contact with the lubricating oil will. Here, an additional advantage is achieved in that, namely, the occurrence of any Leakages visible through the machine if suitable drainage facilities are arranged Piston engine

Applicant:

Sulzer Brothers Aktiengesellschaft,
Winterthur (Switzerland)

Representative: Dipl.-Ing. H. Marsch, patent attorney,
Sdrwelm (Westphalia), Drosselstr. 31

Claimed credit:
Switzerland from October 26, 1955

leaks leaking to the outside are displayed immediately.

Further features of the invention can be found in the description and the drawing in which As an embodiment of the invention, a partial section of an internal combustion engine, namely a diesel engine with cross head and piston rod with stuffing box is shown schematically.

In the drawing, the space enclosed by the cylinder housing 1 is denoted by a, the space enclosed by the crankcase 2 is denoted by b and the piston to be cooled is denoted by 3. The spaces α and b are separated from each other in a gas- and liquid-tight manner. Chamber 4, which is closed on all sides from this space, is housed in space b of the crank wedge housing. This chamber has an opening 5 leading to the outside, through which the supply line 6 and the discharge line 7 for the coolant are introduced into the chamber. The opening 5 is expediently covered with a cover 8 through which, in addition to the coolant lines, the drainage device 9 of the chamber and other lines, not shown here, which, for. B. can serve for measuring purposes, are passed. The chamber also has openings 10 and 10 'leading into the space α of the cylinder housing, through which the tubes 12 and 12', which are firmly connected to the cooling chamber 11 of the piston 3 and belonging to the telescopic connections, are inserted into the chamber. These pipes are guided in the stuffing box packings 13 and 13 'which seal these openings. The supply line 6 protrudes into the sufficient length, which depends on the piston stroke

909 530 / 12B

Claims (4)

Tube 12 into it, in which it is passed through the lock 14. The pipe 12 'protrudes in a corresponding length into the discharge line 7, wherein it is passed through the lock 15 in the line 7. In the embodiment shown, the chamber is welded firmly to the crankcase or to the transverse wall separating the cylinder housing from the crankcase with its ends having the openings 5 and 10 or 10 '. The piston rod 17 is passed through the stuffing box 18. When the cooling system is started up, the coolant reaches the cooling chamber 11 of the piston 3 via the supply line 6 and the pipe 12, which are telescopically connected, and leaves it via the same after sufficient cooling Tube 12 'telescopically connected to the discharge line 7. The inner barriers 14 and 15 of the telescopic tubes never hold so tight that coolant does not pass through the The coolant penetrating through the barriers can, however, with the arrangement of the special chamber 4 ni cht more into the space b and thus to the lubricating oil, but is collected in this chamber, from which it flows through the drainage device 9 to the outside. The observation of this drainage device is a simple means of preventing any leakage of the coolant lines housed in the chamber and their soldered or welded joints, which, for. B. can be caused by vibrations when the internal combustion engine is running, and in particular the occurrence of excessive leaks in the telescopic connections of the "coolant lines to detect immediately 19 (dashed lines) in the drawing, and if one of the number of special drainage devices corresponding to the number of spaces created by dividing the chamber by transverse walls is arranged, the respective location of the leak on the lines can be easily determined To provide a special chamber for each individual supply or discharge line of the coolant. The pressure in space a, which is connected to the scavenging air receiver chamber, not shown here, generally corresponds to that of the scavenging air or the discharge air and is therefore greater than that in the crank chamber b prevailing pressure ck or the pressure of the external atmosphere. These pressure differences between the two spaces have the effect of improving the sealing effect of the stuffing boxes 13 and 13 '. So that these pressure differences remain effective, it is advisable to dimension the discharge opening 16 only so large that a throttling effect of this opening is guaranteed. If leaks occur on the stuffing boxes 13 to 13 ', these could leak any agent sprayed onto the surface of the telescopic tubes 12 or 12'. Is this leak z. B. from coolant, which splashes about as a result of leaking locks 14 and 15 inside the chamber 4 on the telescopic tubes 12 and 12 ', the same can theoretically, but practically only be transported in negligible amounts into the space α, which is under overpressure but never in the crankcase b. Is this leak z. B. from cylinder lubricating oil contaminated with fuel and combustion residues, which splashes within the space α on the telescopic tubes 12 or 12 ', the same can, according to the overpressure in space ο, be transported into chamber 4, but never into crankcase b . The leaks transported into space α or chamber 4 run off from there harmlessly through outlets 16 and 9, and the leakage of leaks from these outlets provides an externally visible measure of any leaks occurring inside the internal combustion engine . _- Instead of the telescopic tubes used, other flexible connections between the coolant lines, e.g. B. rubber or metal hoses or articulated pipes can be used. The chamber 4 can be firmly connected to the crankcase in the form of a special housing or welded to it or also be cast in one piece with it. The application of the invention not only for internal combustion engines but also for piston compressors, heat pumps, refrigeration or other machines whose moving pistons have to be cooled and where the coolant escaping from leaks must not come into contact with lubricating oil or other substances incompatible with the substances to be compressed, is also within the scope of the invention, but their use in internal combustion engines should offer the most advantages. Patent to p.K o.c he: 1. Piston machine, the piston of which is cooled by a means formed by telescoping Lines are fed and discharged, just like the one provided with a cross head Piston rod sealed with stuffing boxes are passed through a partition, which the The cylinder space below the piston separates from the crankcase, characterized in that that the coolant lines through the crankcase in a connecting to the partition wall Chamber are guided, which is tightly sealed against the crankcase. 2. Piston machine according to claim 1, characterized in that the pressure in the cylinder space below the piston is greater than the pressure prevailing in the chamber. 3. Piston machine according to claim 1, characterized in that the chamber is one with the external atmosphere in "aferbind" standing Has opening through which the connecting lines for the coolant are passed. 4. Piston machine according to claim 1, characterized in that the chamber with at least a drainage device leading to the outside for leakage is provided. Considered publications:
German Patent No. 459 873;
H. Krug, "Experiences with marine diesel engines", Springer, 1954, p. 67, fig. 117. 1 sheet of drawings © .909 530/128 6.59