Split flywheel shell integrating heat dissipation air duct and EGR support

Abstract

The present application relates to a kind of flywheel shell, especially a kind of split flywheel shell integrated with heat dissipation air duct and EGR support, comprising flywheel shell, engine support is arranged on the outer circular surface of the flywheel shell, positioning concave circle is arranged in the flange end of the rear end of the flywheel shell, mounting port is arranged on the front end surface and is connected and installed with the output end of crankcase, the top of the flywheel shell is provided with connecting port, the connecting port is connected with EGR support mounting seat, the side of the EGR support mounting seat is provided with heat dissipation air duct opening for heat dissipation, and EGR cooler is arranged on the top surface.The present application utilizes the axial space of flywheel shell, integrates EGR support mounting seat above it, utilizes the characteristics that EGR cooler is suitable for being installed in high position, and simultaneously integrates the function of generator heat dissipation air duct below EGR support mounting seat, is conducive to the compactification and light weight of the overall design of generator set.

Description

TECHNICAL FIELD

[0001] The present application relates to a flywheel housing, in particular to a split flywheel housing integrated with a heat dissipation air duct and an EGR support. BACKGROUND

[0002] With the development and application of engine two-stage supercharging, EGR and other technologies, more and more auxiliary equipment needs to be externally hung around the crankcase, and the space and pipeline layout is becoming more and more complex; diesel generating set in closed factory building or indoor corridor type locomotive and other application occasions need to design a closed heat dissipation air duct for the generator, and the heat dissipation problem of the generator matched with high-power engine puts forward greater demand for the overall space and weight of the integrated unit.

[0003] The flywheel housing bears the connection and positioning function between the engine and the driven part. In addition to the above functions, the split flywheel housing also needs to consider the positioning problem between the crankcase and the crankshaft. The support of part of the engine is also arranged on both sides of the flywheel housing. At present, most flywheel housings adopt thin-walled structure, which has the advantages of simple structure, but has the disadvantages of low functional integration and poor rigidity. SUMMARY

[0004] The present application aims to solve the above-mentioned defects, and provides a split flywheel housing integrated with a heat dissipation air duct and an EGR support, which integrates an EGR support mounting seat for mounting an EGR cooler and a generator heat dissipation air duct, and realizes the compactness and light weight of the overall design of the generator set.

[0005] In order to overcome the defects in the background art, the technical scheme adopted by the present application to solve its technical problems is: a split flywheel housing integrated with a heat dissipation air duct and an EGR support, comprising a flywheel housing, an engine support is arranged on the outer circular surface of the flywheel housing, a positioning concave circle is arranged in the flange end of the rear end of the flywheel housing, an installation port is arranged on the front end surface for butt joint installation with the output end of the crankcase, a connecting port is arranged on the top of the flywheel housing, the connecting port is connected with the EGR support mounting seat, the side surface of the EGR support mounting seat is provided with a heat dissipation air duct port for heat dissipation, and the top surface is provided with an EGR cooler.

[0006] Further improvement, including the flywheel housing outer circle two sides symmetrically arranged window, the window is covered with cover plate, the window and cover plate are fixedly connected through the threaded bolt.

[0007] Further improvement, including the window adopts closed or shielding cover plate.

[0008] Further improvement, including the EGR support mounting seat top is distributedly provided with a fixed rib, and the upper end of the fixed rib is connected and fixed with the EGR cooler.

[0009] Further improvement, including the inner wall of the mounting port annular staggered arrangement of ribs, the rib on the positioning hole, the positioning hole through the inserted positioning pin and screw and crankcase output end connection fixed.

[0010] Further improvement, including the EGR bracket mounting seat is provided with a partition rib plate.

[0011] Further improvement, including the flywheel shell outer wall lower part is provided with an observation hole.

[0012] The beneficial effects of the present application are: the structure utilizes the axial space of the flywheel shell, reduces the axial space requirement of the main generator for its own heat dissipation duct, and further reduces the overall space occupation and weight of the generator set, facilitates heat dissipation, and is conducive to the compactness and light weight of the unit design, meets the increasingly stringent unit structure design requirements; by integrating the EGR bracket mounting seat, the EGR cooler with high integration degree is arranged in the upper space of the conventional circular flywheel shell, and the space and fixing position requirement of the crankcase attached equipment is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] The present application will be further described below in conjunction with the drawings and examples.

[0014] Figure 1 is the axial section view of the rib plate in the present application;

[0015] Figure 2 is the axial section view of the EGR bracket mounting seat duct in the present application;

[0016] Figure 3 is the axial view of the present application;

[0017] In the figure 1-EGR cooler, 2-EGR bracket mounting seat, 3-crankcase, 4-cover plate, 5-engine support, 6-observation hole, 7-flywheel shell, 8-rib, 9-positioning hole, 10-window, 11-positioning concave circle, 12-heat dissipation duct, 13-fixing rib, 14-connection port, 15-mounting port, 16-rib plate. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. All other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0019] According to Figure 2 and Figure 3As shown, a split flywheel shell integrated with a heat dissipation air duct and an EGR support includes a flywheel shell 7, an engine support 5 is arranged on the outer circular surface of the flywheel shell 7, the engine support 5 is assembled and connected through bolts, a positioning concave circle 11 is arranged in the flange end of the rear end of the flywheel shell 7, an installation port 15 is arranged on the front end surface and is connected and installed with the output end of the crankcase 3, the flywheel shell 7 and the main generator are radially positioned through the positioning concave circle 11 in the flange end, the installation position requirement of the generator stator part is ensured, a connecting port 14 is arranged on the top of the flywheel shell 7, the connecting port 14 is connected and arranged with the EGR support mounting seat 2, the EGR support mounting seat 2 is provided with a heat dissipation air duct port 12 on the side surface for heat dissipation, and an EGR cooler 1 is arranged on the top surface, by using the above implementation mode, the axial space of the flywheel shell 7 is utilized, the axial space requirement of the main generator for its own heat dissipation air duct is reduced, and then the space occupation and weight of the generator set as a whole are reduced, which is beneficial to the compactness and light weight of the unit design, is beneficial to meeting the increasingly harsh unit structure design requirements, by integrating the EGR support mounting seat 2, the EGR cooler 1 with high integration degree is arranged in the upper space of the conventional circular flywheel shell 7, the space and fixing position requirement of the crankcase 3 attached equipment is reduced, according to the comprehensive consideration of the assembly position degree and the casting difficulty, the EGR support mounting seat 2 can be integrally cast with the flywheel shell 7 or can be split and separately cast and assembled.

[0020] The flywheel shell 7 is symmetrically provided with a window 10 on both sides of the outer circle, a cover plate 4 is arranged on the window 10, and the window 10 and the cover plate 4 are fixedly connected through the bolts arranged therein, so as to facilitate the opening of the cover plate 4. The window 10 facilitates the assembly work between the crankshaft and the shaft coupling, and is also used for the work of observing and recording the angle indicating value of the hand wheel and the crankshaft during maintenance, and the window 10 adopts a closed or shielding cover plate to realize the function of organizing the flow direction of the generator heat dissipation air duct or shielding foreign matters.

[0021] The window 10 adopts a closed or shielding cover plate 4 to realize the function of organizing the flow direction of the generator heat dissipation air duct or shielding foreign matters. For an outside corridor locomotive, the generator heat dissipation air is directly dispersed in the power room through the flywheel shell 7, at this time, the window 10 cover plate 4 of the flywheel shell 7 is selected to be shielding type, which can allow the hot air to be discharged from the side to increase the heat dissipation area, and has the effect of forming internal and external isolation shielding for the rotating flywheel. For an inside corridor locomotive, since the temperature in the power room cannot be too high, the flywheel shell 7 and the connected air duct are responsible for leading the generator heat dissipation air out of the vehicle, at this time, the window 10 is selected to be a closed cover plate 4, so as to form a relatively closed air duct flow.

[0022] The EGR support mounting seat 2 is provided with a fixed rib 13 on the top, the upper end of the fixed rib 13 is connected and fixed with the EGR cooler 1, the structural rigidity is increased, and the heat dissipation of the EGR cooler 1 is facilitated.

[0023] The inner wall of the mounting port 15 is annularly staggered with reinforcing ribs 8, which are provided with positioning holes 9, and the positioning holes 9 are connected, positioned and fixed with the output end of the crankcase 3 through inserted positioning pins and screws, the flywheel housing 7 and the crankcase 3 are radially positioned through the positioning pins, and the installation shape and position requirements of the positioning concave circle 11 of the output end generator are ensured.

[0024] According to Figure 1 As shown in the drawings, the EGR support mounting seat 2 is provided with a reinforcing rib plate 16 for separation, which plays a guiding role for the heat dissipation air duct and improves the stability and structural rigidity of the EGR support mounting seat 2.

[0025] The flywheel housing 7 is provided with an observation hole 6 on the outer circular wall, which is used for timely finding the water and oil leakage faults of the engine output end.

[0026] Working principle: the flywheel housing 7 is positioned and connected and fixed with the crankcase 3 through the positioning pins inserted in the positioning holes 9, the positioning concave circle 11 in the front flange of the flywheel housing 7 is butted with the main generator, the flywheel housing 7 is connected and fixed with the EGR support mounting seat 2, the EGR cooler 1 is installed on the EGR support mounting seat 2, and the heat generated by the main generator working in the crankcase is discharged through the heat dissipation air duct port 12 and the window 10.

[0027] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A split flywheel housing integrated with a heat dissipation air duct and an EGR support, comprising a flywheel housing (7), an engine support (5) is arranged on the outer circular surface of the flywheel housing (7), a positioning concave circle (11) is arranged in the flange end of the rear end of the flywheel housing (7), and a mounting port (15) is arranged on the front end surface and is connected and mounted with the output end of the crankcase (3), characterized in that, The flywheel shell (7) top is provided with a connecting port (14), the connecting port (14) is connected with EGR support mounting seat (2) setting, the EGR support mounting seat (2) side is equipped with the heat dissipation air duct mouth (12) for heat dissipation, top is provided with EGR cooler (1), the flywheel shell (7) outer circle both sides are symmetrically provided with window (10), the main generator work generates heat in the crankcase, is discharged through the heat dissipation air duct mouth (12) and window (10); The inner wall of the mounting port (15) is provided with annular staggered rib (8), the rib (8) is provided with positioning hole (9), the positioning hole (9) is connected and fixed with the output end of the crankcase (3) through the inserted positioning pin and screw; The EGR support mounting seat (2) is provided with rib (16) for separation.

2. The split flywheel housing of claim 1, wherein: The window (10) is provided with cover plate (4), and the window (10) and the cover plate (4) are fixedly connected by penetrating bolt.

3. The split flywheel housing of claim 2, wherein: the first flywheel housing half further comprises: a first EGR support member; and a first heat sink fan; and the second flywheel housing half further comprises: a second EGR support member; and a second heat sink fan. The window (10) adopts closed or shielding cover plate (4).

4. The split flywheel housing integrating heat dissipation duct and EGR bracket as described in claim 1, characterized in that: The EGR support mounting seat (2) top is distributed and is provided with fixed rib (13), and the upper end of the fixed rib (13) is connected and fixed with the EGR cooler (1).

5. The split flywheel housing of claim 1, wherein: the first housing half further comprises: a first EGR support member; and a first heat sink fan; and the second housing half further comprises: a second EGR support member; and a second heat sink fan. The flywheel shell (7) outer circle wall lower part is equipped with observation hole (6).

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