CN-121976892-A - Modular cylinder sleeve-crankcase assembly device, and replacement method and application thereof

CN121976892ACN 121976892 ACN121976892 ACN 121976892ACN-121976892-A

Abstract

The invention provides a modularized cylinder sleeve-crankcase assembly device, a replacement method and application thereof, and belongs to the technical field of piston aeroengines. The invention comprises a core crankcase module and at least one single cylinder module detachably mounted on the core crankcase module so as to realize independent quick replacement of the single cylinder. According to the invention, a cylinder sleeve, a cylinder cover and a valve mechanism are integrated in an independent single cylinder module, and are connected with a core crankcase module integrating a main oil duct, a crankshaft installation cavity and other core functional cavities by adopting a standardized detachable interface, so that a modularized cylinder sleeve-crankcase assembly device is constructed. Independent quick replacement of a single cylinder is realized, engines with different cylinder numbers can be flexibly combined by replacing core crankcase modules with different installation positions, meanwhile, the sealing reliability is improved through a standardized sealing interface and a quick fluid connector, the maintenance cost and the period are greatly reduced, and the expansibility of a product platform is enhanced.

Inventors

WANG YANHU
DU JIAN
Shi Haipo
LIU DONG
Jin Tianwei

Assignees

浙江直列动力有限公司

Dates

Publication Date: 20260505
Application Date: 20260305

Claims (10)

1. A modular cylinder liner-crankcase assembly comprising: The core crankcase module is internally integrated with a main oil duct, a crankshaft mounting cavity, a cooling liquid distribution cavity and a branch oil duct; At least one single cylinder module detachably mounted on the core crankcase module to achieve independent quick replacement of the single cylinder; the single cylinder module includes: The lower part of the cylinder sleeve is provided with an opening, and an oil scraping ring for preventing engine oil of the crankcase from channeling upwards is arranged at the opening; The cylinder cover is used for sealing the top of the cylinder sleeve and is provided with an air inlet and an air outlet; And the valve mechanism is arranged on the cylinder cover.
2. The modular cylinder liner-crankcase assembly of claim 1, wherein the upper mating surface of the core crankcase module is provided with a plurality of standard module mounting locations of uniform geometry for the adapted mounting of the single cylinder modules to achieve flexible combinations of different numbers of single cylinder modules.
3. The modular cylinder liner-crankcase assembly of claim 1, wherein a standardized high strength seal interface is provided between the single cylinder module and the core crankcase module, the standardized high strength seal interface comprising: The finish machining positioning structure is formed by matching a crankcase positioning hole on the core crankcase module with a cylinder positioning hole on the single cylinder module and is used for realizing radial positioning of the single cylinder module and the core crankcase module; the high-strength bolt connection structure is circumferentially arranged around the cylinder sleeve and is formed by matching a crankcase high-strength bolt hole on the core crankcase module with a cylinder high-strength bolt on the single cylinder module, and is used for providing axial pressing force to bear the explosion pressure in the cylinder; The sealing structure is formed by matching a cylinder bottom sealing groove arranged at the lower end of the cylinder sleeve with a dry sleeve mounting shoulder arranged on the core crankcase module and is used for isolating a cylinder combustion chamber from the interior of the crankcase.
4. The modular cylinder liner-crankcase assembly of claim 1, further comprising a quick fluid connector comprising a female connector and a male connector that mate with each other, the female connector being disposed on the core crankcase module and the male connector being disposed on the single cylinder module for automatically conducting or sealing the main oil gallery and the fluid passages corresponding to the coolant distribution chamber when the modules are docked or undocked.
5. The modular cylinder sleeve-crankcase assembly device of claim 4, wherein the quick fluid connector is a dry disconnect self-sealing joint, a one-way valve core is arranged in the female joint, an oil passage female interface, a cooling fluid female interface and a female joint sealing ring are arranged on the female joint, and an engine oil male interface, a cooling fluid male interface, an engine oil male joint sealing ring and a cooling fluid joint sealing ring are arranged on the male joint for realizing the sealing connection of a fluid passage.
6. A modular cylinder liner-crankcase assembly according to claim 1, wherein the cylinder head is further provided with an air passage reservation for adjusting the intake or exhaust path.
7. A modular cylinder liner-crankcase assembly according to any of claims 1-6, wherein the left and right ends of the core crankcase module are provided with left and right end steps, respectively.
8. A method of replacing a modular cylinder liner-crankcase assembly according to any of claims 1-7, comprising the steps of: s1, detaching a single cylinder module to be replaced; Step S2, separating the single cylinder module from the core crankcase module along the axial direction, wherein in the process, the quick fluid connector between the single cylinder module and the core crankcase module is automatically disconnected and the fluid channel of the quick fluid connector is sealed; s3, axially aligning the new single-cylinder module with the corresponding installation position of the core crankcase module; Step S4, installing a new single-cylinder module along the axial direction until the single-cylinder module is completely positioned, and automatically butting and conducting a fluid channel by a quick fluid connector between the single-cylinder module and the quick fluid connector in the process; And S5, installing and fastening a new single cylinder module.
9. A method of replacing a modular cylinder liner-crankcase assembly according to claim 8, wherein the different cylinder numbers are formed by replacing a core crankcase module having a different number of module mounting locations and mounting a corresponding number of single cylinder modules thereon.
10. Use of a modular cylinder liner-crankcase assembly device according to any of claims 1-6 in an aeroengine.

Description

Modular cylinder sleeve-crankcase assembly device, and replacement method and application thereof Technical Field The invention relates to the technical field of piston aeroengines, in particular to a modularized cylinder sleeve-crankcase assembly device, and a replacement method and application thereof. Background The crankcase and the cylinder block of the traditional integrated engine are generally in a structure form of integral casting, integral processing or rigid connection of bolts, and the design has the defects of inconvenient maintenance, poor expansibility, complex sealing structure and the like. When a single cylinder is severely worn, pulled or damaged, the whole engine is often required to be disassembled and disassembled in a large area, and even the whole cylinder body is required to be replaced, so that the maintenance period is long and the cost is high. In addition, the displacement and the number of cylinders of the engine are fixed in the design and manufacturing stage, and when engines with different displacement (such as 4 cylinders and 6 cylinders) are developed based on the same platform, different cylinder blocks and crankcases are usually required to be redesigned and manufactured, so that the generalization and the rapid modification of core components are difficult to realize. Meanwhile, the cooling water channel and the lubricating oil channel penetrate through the integral cylinder body, a large number of O-shaped rings, sealing gaskets and complex machining channels are relied on, a plurality of potential leakage points exist, and the requirement on assembly precision is high. Therefore, there is a need for an engine structural design that is easy to maintain, easy to expand, and reliable in sealing. Disclosure of Invention In view of the above, in order to solve the technical problems of difficult maintenance and poor discharge capacity expansibility of an engine in the prior art, the invention provides a modularized cylinder sleeve-crankcase assembly device, a replacement method and application thereof. Independent quick replacement of a single cylinder is realized, engines with different cylinder numbers can be flexibly combined by replacing core crankcase modules with different installation positions, meanwhile, the sealing reliability is improved through a standardized sealing interface and a quick fluid connector, the maintenance cost and the period are greatly reduced, and the expansibility of a product platform is enhanced. In order to achieve the above purpose, the present invention provides the following technical solutions: in a first aspect, the present invention provides a modular cylinder liner-crankcase assembly device comprising: The core crankcase module is internally integrated with a main oil duct, a crankshaft mounting cavity, a cooling liquid distribution cavity and a branch oil duct; At least one single cylinder module detachably mounted on the core crankcase module to achieve independent quick replacement of the single cylinder; the single cylinder module includes: The lower part of the cylinder sleeve is provided with an opening, and an oil scraping ring for preventing engine oil of the crankcase from channeling upwards is arranged at the opening; The cylinder cover is used for sealing the top of the cylinder sleeve and is provided with an air inlet and an air outlet; And the valve mechanism is arranged on the cylinder cover. Preferably, the upper joint surface of the core crankcase module is provided with a plurality of standard module installation positions with uniform geometric dimensions, and the standard module installation positions are used for adaptively installing the single cylinder modules, so that flexible combination of different numbers of single cylinder modules is realized. Preferably, a standardized high-strength sealing interface is arranged between the single cylinder module and the core crankcase module, and the standardized high-strength sealing interface comprises: The finish machining positioning structure is formed by matching a crankcase positioning hole on the core crankcase module with a cylinder positioning hole on the single cylinder module and is used for realizing radial positioning of the single cylinder module and the core crankcase module; the high-strength bolt connection structure is circumferentially arranged around the cylinder sleeve and is formed by matching a crankcase high-strength bolt hole on the core crankcase module with a cylinder high-strength bolt on the single cylinder module, and is used for providing axial pressing force to bear the explosion pressure in the cylinder; The sealing structure is formed by matching a cylinder bottom sealing groove arranged at the lower end of the cylinder sleeve with a dry sleeve mounting shoulder arranged on the core crankcase module and is used for isolating a cylinder combustion chamber from the interior of the crankcase. Preferably, the engine further comprises a qu