CN211343106U - Auxiliary blower device for large engine and large engine with same - Google Patents

Auxiliary blower device for large engine and large engine with same Download PDF

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Publication number
CN211343106U
CN211343106U CN201922188831.7U CN201922188831U CN211343106U CN 211343106 U CN211343106 U CN 211343106U CN 201922188831 U CN201922188831 U CN 201922188831U CN 211343106 U CN211343106 U CN 211343106U
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CN
China
Prior art keywords
auxiliary blower
large engine
engine
blower device
auxiliary
Prior art date
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Active
Application number
CN201922188831.7U
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Chinese (zh)
Inventor
M·格拉芙
S·泽尼克森
R·鲁施
R·艾格
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Winterthur Gas and Diesel AG
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Winterthur Gas and Diesel AG
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Publication date
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/32—Engines with pumps other than of reciprocating-piston type
    • F02B33/34—Engines with pumps other than of reciprocating-piston type with rotary pumps
    • F02B33/40—Engines with pumps other than of reciprocating-piston type with rotary pumps of non-positive-displacement type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/32—Engines with pumps other than of reciprocating-piston type
    • F02B33/34—Engines with pumps other than of reciprocating-piston type with rotary pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/04—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
    • F02B37/10—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump at least one pump being alternatively or simultaneously driven by exhaust and other drive, e.g. by pressurised fluid from a reservoir or an engine-driven pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/02—Drives of pumps; Varying pump drive gear ratio
    • F02B39/08—Non-mechanical drives, e.g. fluid drives having variable gear ratio
    • F02B39/10—Non-mechanical drives, e.g. fluid drives having variable gear ratio electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/10157—Supercharged engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
    • F02B25/02—Engines characterised by using fresh charge for scavenging cylinders using unidirectional scavenging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/04—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump

Abstract

The utility model relates to a large-scale engine that is used for auxiliary blower device of large-scale engine and has it. The large engine is especially a longitudinal scavenging low-speed running crosshead large engine. The large engine has an exhaust pipe including: a collecting pipe having a plurality of connecting branches connectable to cylinder liners of the large engine, respectively, for receiving and collecting exhaust gas; and an outlet pipe connectable to a turbocharger for receiving the exhaust gas, wherein the auxiliary blower device includes an auxiliary blower, and the exhaust pipe has a plurality of flexible supports and at least one fixed leg to be supported on the large engine. According to the utility model discloses, supplementary air-blower with fixed stabilizer blade forms whole unit.

Description

Auxiliary blower device for large engine and large engine with same
Technical Field
The present invention relates to an auxiliary blower device for large engines, in particular for longitudinally swept low-speed running crosshead large engines, and to a large engine comprising such an auxiliary blower device.
Background
In a number of different detailed variants, large engines operating at low speed, in particular longitudinally scavenged large engines of the crosshead design according to the invention, have been used preferably in shipbuilding or in stationary installations, for example for the production of electrical energy, for decades.
In many cases, such large engines include three large casing segments that form the motor frame. On the base plate (which has, in addition to the bearing blocks for receiving the crankshaft main bearings of the crankshaft, also transverse supporting elements), so-called brackets are arranged separately from the bottom plate. The known bracket comprises a number of supporting bodies arranged opposite to each other corresponding to the number of cylinder liners of a large engine, each supporting body having a vertically extending sliding surface for guiding two adjacent crossheads, which are connected to the crankshaft by means of push rods. A cylinder part, usually called cylinder shell, is then arranged above the support, which cylinder part is adapted to accommodate one or more cylinder liners. The base plate, the bracket and the cylinder part are connected to each other by a connecting rod which extends in the support body, usually in the vicinity of the bracket, i.e. by screwing the connecting rod into or onto the base plate under considerable prestress.
In the operating state, by opening an outlet valve provided in the cylinder head of the cylinder liner, hot exhaust gases are supplied from the combustion chambers of the cylinder liner via an exhaust pipe to a charging group in the form of a turbocharger, by means of which fresh air is sucked in and compressed and delivered as scavenging air to the respective combustion chambers of the cylinder liners of the large engine via so-called scavenging slots in the lower region of the cylinder liners.
An example of such a large engine is particularly disclosed in CN 105545437A.
Furthermore, it is known to additionally provide an electrically driven auxiliary blower for supporting the turbocharger, which auxiliary blower serves as an alternative to the turbocharger or in addition to the turbocharger for ensuring that fresh air is sufficiently supplied into the cylinder liners depending on the operating conditions. Such large engines with electrically assisted blowers are disclosed, for example, in DE 102005016820B 4.
As is well known, engines operate by either a diesel process (i.e., as a self-ignition) or by an Otto (Otto) process in which the mixture can be spark ignited at a suitable crank angle with a suitable ignition source. The fuel used is, for example, heavy fuel oil, diesel oil, gas or other suitable fuels known per se to the person skilled in the art. According to the present invention, there are more and more types of large engines on the market, also so-called dual fuel engines, which can be operated with conventional fuels, such as heavy fuel oil or diesel, and also with suitable gases as fuel.
An exhaust pipe is usually supported on the engine by a plurality of flexible supports and substantially inflexible or fixed supports, which exhaust pipe is simultaneously connected to a plurality of cylinder liners in a manner known per se for the purpose of discharging exhaust gases from the associated combustion chamber. The inflexible or fixed support (hereinafter referred to as the fixed leg) and thus the corresponding attachment part on the exhaust pipe that connects the exhaust pipe with the fixed support (i.e., the fixed leg) enable the exhaust pipe to be positioned safely and reliably with respect to the longitudinal, lateral, and vertical directions. In addition to the effects due to the great weight of these components and the static and dynamic effects of pressure fluctuations and vibrations in the exhaust system and the engine as a whole, it is of utmost importance that the structural components of the fixing feet are also exposed to thermal stresses due to the temperature difference between the thermally insulated exhaust pipe located on top of the engine and the cold non-insulated fixing feet also attached under the engine.
The current state of the art design of the above exhaust system is based on the following principle: the exhaust pipe is first manufactured in one piece and then the fixing feet are welded to the exhaust pipe in a second step. The exhaust pipe is embedded in the fixing leg. The fixing feet themselves are generally wider than the distance between two adjacent cylinder liners.
The design of the fixing feet known from the prior art usually has a double function. On the one hand, they serve as connection points for an electrically auxiliary blower. In this case, pressurized, cold scavenging air is applied to the structure of the fixing foot or to different or all parts or to the fixing foot itself. Via the horizontally arranged connection point, an auxiliary blower attached outside the fixed foot sucks in fresh air from the fixed foot (which has a first bottom opening in the bottom of the fixed foot) so that fresh air from the fresh air charging unit can enter the fixed foot through the bottom opening after cooling and discharging of the fresh air. The outlet of the auxiliary blower housing is arranged on the scavenging air receiver or on a second bottom opening on the fresh air charging unit for blowing in fresh air. In some cases, a specially designed non-return or air-control device can still be arranged in a manner known per se in front of or behind the auxiliary blower, which in some cases can also be arranged in the fixing foot.
All these auxiliary blower devices known from the prior art have the disadvantage, among other things, of occupying a relatively large amount of space, but in practice the installation space available on the engine is often very limited anyway.
SUMMERY OF THE UTILITY MODEL
It is therefore an object of the present invention to provide an improved auxiliary blower device for large engines.
The subject matter of the present invention that meets these objectives is characterized by the features of the first aspect of the invention.
Other aspects relate to particularly advantageous embodiments of the invention.
Accordingly, in a first aspect, the present invention relates to an auxiliary blower arrangement for a large engine, in particular for a longitudinally scavenged slow running crosshead large engine, said large engine having an exhaust pipe comprising: a collecting pipe having a plurality of connecting branches that can be respectively connected to cylinder liners of a large engine for receiving and collecting exhaust gas; and an outlet duct connectable to a turbocharger for receiving exhaust gas, wherein the auxiliary blower device comprises an auxiliary blower and the exhaust duct has a plurality of flexible supports and at least one fixed foot for support on the large engine, characterized in that the auxiliary blower forms an integral unit with the fixed foot.
It is therefore important for the present invention that the auxiliary blowers form an integral unit with the fixing feet. Thus, compared to the prior art, the new design of the present invention provides a more compact and space-saving option for an integrated auxiliary blower. The horizontal connecting flange between the fixing legs and the auxiliary blower, which is required in the prior art, becomes unnecessary since the welded structure of the auxiliary blower and the fixing legs forms an integral unit. The special welding process for the housing of the auxiliary blower ensures that the required dimensional tolerances of the housing of the rotary auxiliary blower can be maintained.
In one aspect, the auxiliary blower can be arranged particularly advantageously inside the fixing feet if its housing is sufficiently small, so that no additional installation space is required for the auxiliary blower itself. Thus, only the slightly protruding electric motor of the auxiliary blower requires some installation space on the outside. But not the auxiliary blowers themselves. An opening for an air outlet of the auxiliary blower is also located in the fixing leg.
In another aspect, the housing of the auxiliary blower can also be arranged very advantageously on the outer boundary wall of the fixing foot if it is too large and therefore cannot be placed inside the fixing foot. In this case, the housing of the auxiliary blower or the auxiliary blower itself can be welded very easily from the outside to the frame or boundary wall of the fixing foot. In this case, the auxiliary blower is in fact also driven by an electric motor, which is preferably arranged outside the fixing foot.
The utility model discloses still relate to one kind and have the utility model discloses a large-scale engine of supplementary air-blower device, especially the large-scale engine of the low-speed operation cross head of vertical scavenging formula.
Drawings
Hereinafter, the present invention will be explained in more detail with reference to the accompanying drawings. Shown in the schematic diagram:
fig. 1 schematically shows an auxiliary blower arranged inside a stationary foot;
fig. 2 shows a second embodiment in which the auxiliary blower is arranged on the outer boundary wall of the fixing leg.
Detailed Description
Fig. 1 and 2 each show two different embodiments of an auxiliary blower device 1 according to the invention for large engines, in particular for longitudinally scavenged slow running crosshead large engines. Although fig. 1 schematically shows the auxiliary blower arranged inside the fixing leg, a second embodiment of the present invention in which the auxiliary blower is arranged on the outer boundary wall of the fixing leg is schematically shown with reference to fig. 2.
The exhaust system of a large engine, not shown, which is also not shown in detail in fig. 1 and 2, comprises in a manner known per se: a collecting pipe having a plurality of connecting branches which are in each case connected to the cylinder liners of the large engine for receiving and collecting exhaust gases; and at least one outlet pipe connected to a turbocharger for receiving exhaust gas. In addition to the turbocharger, an auxiliary blower 2 is provided, wherein the exhaust pipe also has a plurality of flexible supports, which are also not shown for the sake of clarity. Furthermore, a fixing foot 3 is provided for support on large engines. According to the present invention, in fig. 1 and 2, the auxiliary blowers 2 and the fixed legs 3 all form an integral unit.
In the embodiment shown in fig. 1, which is particularly advantageous in practice, the auxiliary blower 2 is arranged in the interior 31 of the fixed leg part 3. This, of course, allows a particularly compact design, since no additional installation space is required for the auxiliary blower 2.
If the auxiliary blower 2 or the housing of the auxiliary blower 2 cannot be placed in the fixing foot as shown in fig. 1 because of its size, it can be arranged according to fig. 2 on the outer boundary wall 32 of the fixing foot 3. In this case, the housing of the auxiliary blower 2 or the auxiliary blower 2 itself can be welded very easily from the outside to the frame 33 or the boundary wall 32 of the fixing foot 3. In this case, the auxiliary blower 2 is in fact also driven by an electric motor 21, which is preferably arranged outside the fixing foot 3.
It is understood by the person skilled in the art that the invention is not limited to the embodiments explicitly discussed, but that the invention also covers corresponding further designs. In particular, the invention naturally relates to all suitable combinations of the particular embodiments discussed.

Claims (8)

1. An auxiliary blower device (1) for a large engine having an exhaust pipe comprising: a collecting pipe having a plurality of connecting branches connectable to cylinder liners of the large engine, respectively, for receiving and collecting exhaust gas; and an outlet pipe connectable to a turbocharger for receiving the exhaust gases, wherein the auxiliary blower device (1) comprises an auxiliary blower (2) and the exhaust pipe has a plurality of flexible supports and at least one fixed foot (3) for support on the large engine, characterized in that the auxiliary blower (2) forms an integral unit with the fixed foot (3).
2. The auxiliary blower device (1) according to claim 1, characterized in that the auxiliary blower (2) is arranged in the interior (31) of the fixing foot (3).
3. Auxiliary blower device (1) according to claim 1, characterised in that the auxiliary blower (2) is arranged on an outer boundary wall (32) of the fixing foot (3).
4. Auxiliary blower device (1) according to claim 3, characterised in that the auxiliary blower (2) is welded to the frame (33) of the fixing foot (3).
5. The auxiliary blower device (1) according to any one of claims 1 to 4, characterized in that the auxiliary blower (2) is driven by an electric motor (21) arranged outside the fixing foot (3).
6. The auxiliary blower device (1) according to any one of claims 1-4, characterized in that the large engine is a longitudinal scavenging slow running crosshead large engine.
7. A large engine, characterized in that it has an auxiliary blower device (1) according to any one of claims 1-5.
8. The large engine according to claim 7, characterized in that it is a longitudinal scavenging slow running crosshead large engine.
CN201922188831.7U 2019-09-12 2019-12-06 Auxiliary blower device for large engine and large engine with same Active CN211343106U (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01149/19 2019-09-12
CH01149/19A CH716579A2 (en) 2019-09-12 2019-09-12 Auxiliary fan arrangement for a large engine, as well as a large engine with an auxiliary fan.

Publications (1)

Publication Number Publication Date
CN211343106U true CN211343106U (en) 2020-08-25

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CN201922188831.7U Active CN211343106U (en) 2019-09-12 2019-12-06 Auxiliary blower device for large engine and large engine with same

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JP (1) JP3225406U (en)
KR (1) KR20210000678U (en)
CN (1) CN211343106U (en)
CH (1) CH716579A2 (en)

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Publication number Publication date
CH716579A2 (en) 2021-03-15
KR20210000678U (en) 2021-03-23
JP3225406U (en) 2020-03-05

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