CN212105996U

CN212105996U - Oil return port connecting structure of oil pan of diesel engine

Info

Publication number: CN212105996U
Application number: CN202020836105.1U
Authority: CN
Inventors: 郑庆国
Original assignee: Guo Chengjiang
Current assignee: Guo Chengjiang
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2020-12-08
Anticipated expiration: 2030-05-19

Abstract

The utility model relates to a diesel engine oil sump oil return opening connecting structure, which comprises a metal connecting sheet and a rubber gasket; the metal connecting sheet is annular, the outer ring is fixed between the flow guide sleeve and the oil pan flange, and the other inner ring is fixed between the circulation cabin compression ring and the circulation cabin flange; the middle section of the metal connecting sheet is in a U-shaped bend or an omega-shaped bend; the rubber gasket is arranged on the connecting surface of at least the lower side of the metal connecting sheet. The utility model discloses metal connecting piece adopts the curved or omega shape of U-shaped to bend, has the elastic deformation ability, can carry out the offset compensation to the vibration displacement of diesel engine, has ensured the leakproofness simultaneously, and structural style is simple, simple to operate, and the reliability is high, and the security is high, and the seepage risk is low, and oil, water pollution risk are low.

Description

Oil return port connecting structure of oil pan of diesel engine

Technical Field

The utility model relates to a diesel engine oil pan oil return opening connection structure belongs to diesel engine technical field.

Background

The oil return port connecting structure of the existing diesel engine oil pan adopts a single-layer or multi-layer (2 or 3 layers) rubber connecting sheet mode to realize the connection between the diesel engine oil pan and the circulating cabin, has the defect that a compression bolt is easy to loosen, has short rubber service life, poor shock absorption performance, easy aging and cracking and smaller bearable external pressure, and has the risk of causing lubricating oil to easily overflow from the circulating cabin to the outside and polluting the lubricating oil by pouring the sewage at the bottom of the cabin into the oil cabin if the lubricating oil is damaged. The engine room sewage flows back into the circulating cabin from the damaged rubber connection part, so that the accidents of polluting lubricating oil and causing damage to moving parts of the diesel engine sometimes occur, and the service life of the diesel engine is influenced. The concrete points are as follows:

1) after the rubber connecting sheet is used for a long time, the compression recovery capacity of the rubber connecting sheet is weakened, the fit degree between the multi-layer rubber connecting sheet and the compression ring is reduced, gaps are generated, the compression bolts are loosened, and the risk of lubricating oil or sewage leakage is increased;

2) the rubber connecting sheet can be subjected to tensile force or extrusion force generated by vibration of the diesel engine in the up-down direction and the front-back direction, so that fatigue is easily generated to cause cracking, the service life is influenced, and the isolation protection effect is lost;

3) the rubber connecting sheet is easy to age and break after being stressed, so that lubricating oil overflows outwards or bilge sewage flows back into the oil tank;

4) the rubber connecting sheet can bear smaller external pressure, and is easily crushed when a large amount of water enters the cabin, so that a large amount of water enters the diesel engine.

Disclosure of Invention

The utility model aims at providing a diesel engine oil pan oil return opening connection structure, use through taking metal connecting piece and rubber gasket combination, utilize the U-shaped of metal connecting piece to bend or the curved offset compensation that carries out of omega shape, overcome the above-mentioned shortcoming of current connecting device structural style, and guarantee good shock absorption performance, possess and bear certain external pressure, even when the cabin intakes in a large number, also can guarantee can not let inside the diesel engine of water refluence inflow, reduce the seepage risk, improve reliability and the security of being connected between diesel engine oil pan and circulation cabin.

The utility model adopts the following technical proposal:

a diesel engine oil sump oil return opening connecting structure comprises a metal connecting sheet 12 and a rubber gasket 11; the metal connecting sheet 12 is annular, the outer ring is fixed between the flow guide sleeve 15 and the oil pan flange 8, and the other inner ring is fixed between the circulation cabin compression ring 13 and the circulation cabin flange 14; the middle section of the metal connecting sheet 12 is in a U-shaped bend or an omega-shaped bend; the rubber gasket 11 is arranged on at least the lower side connecting surface of the metal connecting sheet 12.

Preferably, the oil pan compression ring 7 is also included; the oil pan flange 8 is provided with corresponding bolt holes, and the oil pan clamp ring 7, the air guide sleeve 15, the metal connecting sheet 12 and the oil pan clamp ring 7 are sequentially connected and fixed through the clamp bolts.

Further, the circulating cabin compression ring 13 and the metal connecting sheet 12 and the circulating cabin flange 14 are sequentially connected and fixed through the compression bolts.

Preferably, the upper connecting surface of the metal connecting sheet 12 is also provided with a rubber gasket 11.

Preferably, the curved convex part of the U-shaped bend or the omega-shaped bend faces downwards.

The beneficial effects of the utility model reside in that:

1) the metal connecting sheet and the rubber gasket are combined for use, so that the sealing property is ensured;

2) the metal connecting sheet adopts a U-shaped bend or an omega-shaped bend, has elastic deformation capacity and can compensate the offset of the vibration displacement of the diesel engine;

3) the joint degree of the compression ring and the connecting sheet is high;

4) the metal connecting sheet has high-strength pressure resistance and strong compensation capability.

5) The structure type is simple, simple to operate, and the reliability is high, and the security is high, and the seepage risk is low, and oil, water pollution risk are low.

Drawings

FIG. 1 is a schematic elevation view of a diesel engine oil sump and oil circulation tank.

Fig. 2 is an elevation view of a connection structure of a bottom case and an oil circulation compartment of a conventional diesel engine.

Fig. 3 is a top view of fig. 2.

Fig. 4 is a schematic view of a conventional connection structure of a bottom case and an oil circulation tank of a diesel engine using a single-layer rubber connecting sheet (a partially enlarged view of fig. 2).

Fig. 5 is a schematic diagram of a connection structure of a bottom shell and an oil circulation tank of a conventional diesel engine, which adopts a double-layer rubber connecting sheet.

Fig. 6 is a vertical view of the oil return port connecting structure of the oil pan of the diesel engine of the utility model.

Fig. 7 is a schematic diagram (a partial enlarged view of fig. 6) of the oil return port connection structure of the diesel engine oil pan of the present invention using a single-layer rubber gasket.

Fig. 8 is a partially enlarged view of fig. 7.

Fig. 9 is a schematic diagram of the oil return port connection structure of the diesel engine oil pan of the present invention using a double-layer rubber gasket.

Fig. 10 is a partially enlarged view of fig. 9.

Fig. 11 is a schematic diagram of the oil return port connection structure of the diesel engine oil pan of the present invention, which adopts a double-layer rubber gasket with a U-shaped curved profile of a metal connecting sheet.

Fig. 12 is a partially enlarged view of fig. 11.

Fig. 13 is the utility model discloses diesel engine oil pan oil return opening connection structure adopts the double-deck rubber gasket with the curved profile modeling of metal connecting piece omega shape.

Fig. 14 is a partially enlarged view of fig. 13.

In the figure, 1, a diesel engine, 2, an oil pan, 3, a connecting piece, 4, a circulation tank compression ring, 5, a circulation tank flange, 6, a filter screen, 7, an oil pan compression ring, 8, an oil pan flange, 9, a rubber connecting piece, 10, an oil circulation tank top plate, 11, a rubber gasket, 12, a metal connecting sheet, 13, a circulation tank compression ring, 14, a circulation tank flange and 15, a flow guide cover.

Detailed Description

The invention is further described with reference to the following figures and specific examples.

Comparative example:

the lubricating system of the diesel engine is relatively complicated, and particularly, the lubricating system can normally run only by arranging 1 independent lubricating oil circulating cabin below the diesel engine because the lubricating oil quantity for lubricating is relatively large in a large-scale low-speed diesel engine for ship propulsion. The lubricating oil pump sucks lubricating oil from the lubricating oil circulation cabin, the lubricating oil enters the diesel engine after being pressurized, moving parts in a cylinder of the diesel engine are lubricated, and then the lubricating oil flows back to the circulation cabin through a connecting piece between the oil pan and the lubricating oil circulation cabin, and the figure 1 shows. Because there is certain vibration in the diesel engine operation process, make the diesel engine can produce the displacement volume of upper and lower, fore-and-aft direction, and the circulation cabin is fixed, if the oil pan direct mount of diesel engine is in the circulation cabin, then will destroy the circulation cabin, so can not adopt fixed connection spare between oil pan and the circulation cabin, need adopt the connecting piece that has certain flexibility to the vibration of adaptation diesel engine.

The existing connecting device is structurally characterized in that flexible connection between an oil pan and a circulation cabin of the diesel engine is achieved by adopting a mode of multiple layers of rubber connecting sheets, and the internal lubricating oil of the diesel engine is guaranteed to be isolated from the outside, and the connecting sheets are respectively fixed on an oil pan flange and a circulation cabin flange through bolts, for example, 2 layers of rubber connecting sheets are adopted in fig. 2-4, and 3 layers of rubber connecting sheets are adopted in fig. 5.

The first embodiment is as follows:

the embodiment is directed to a connection mode between an oil pan and an oil circulation chamber of a modern diesel engine.

As shown in fig. 6-8, the oil return port connecting structure of the oil pan of the diesel engine is composed of an oil pan flange 8, a clamp ring 7, a clamp bolt, a metal connecting sheet 12, a rubber gasket 11 and a circulation tank flange 14.

The metal connecting sheet 12 participates in isolation, the rubber gasket 11 only participates in sealing of the metal connecting sheet 12 and each flange, the outer ring of the metal connecting sheet 12 and the rubber gasket 11 are fixed on the oil pan flange 7 through compression bolts, and the inner ring of the metal connecting sheet 12 and the rubber gasket 11 are fixed on the circulation cabin flange 14 through compression bolts.

The metal connecting sheet is made of stainless steel, copper or copper alloy materials, has certain oil resistance and corrosion resistance, is bent in a U shape or an omega shape in the middle section, and has good anti-seismic performance.

When in installation, the method comprises the following steps:

s1, processing the metal connecting sheet and the rubber gasket in a workshop according to the sizes of the oil pan and the flange of the circulation cabin;

s2, using 1 layer of metal connecting sheet and 1 layer of rubber gasket, firstly placing the rubber gasket on the outer side of the metal connecting sheet (contacting with the flange);

and S3, fastening the metal connecting sheet inner ring and the metal connecting sheet inner ring on the circulation cabin flange by using the circulation cabin clamp ring and the bolts for the rubber gasket, and fastening the metal connecting sheet outer ring and the metal connecting sheet outer ring on the oil pan flange by using the oil pan clamp ring and the bolts for the rubber gasket.

Example two:

as shown in fig. 9-10: the difference from the first embodiment is that: in this example 1 metal tab and 2 rubber gaskets were used.

When in installation, the method comprises the following steps:

s2, using 1 layer of metal connecting sheet and 2 layers of rubber gaskets, firstly placing the rubber gaskets on the inner side and the outer side of the metal connecting sheet;

The following modifications of the invention with respect to the prior art are listed below:

1) the metal connecting sheet is used for replacing part of the rubber connecting sheet, so that the effect of the rubber connecting sheet on the sealing performance is kept, the negative influence of weakened resilience of the original rubber connecting sheet is reduced, the connecting sheet and the compression ring can keep close contact, no gap exists, the compression bolt does not loosen, and the risk of leakage of lubricating oil or sewage is reduced;

2) the U-shaped bend or the omega-shaped bend is adopted, so that the vertical and front and back offsets generated by the vibration of the diesel engine can be compensated, the fatigue stress of the connecting sheet is reduced, and the service life of the connecting sheet is prolonged;

3) aiming at the problems that the rubber connecting sheet is easy to age and break after being stressed, the first embodiment is as follows: due to the adoption of the metal connecting sheet, the lubricating oil and bilge water can be blocked by sufficient strength and sealing performance, the risk that the lubricating oil overflows outwards and the bilge water flows back into the oil tank is reduced, and meanwhile, the tight fit degree is maintained and the risk of leakage of the lubricating oil or the bilge water is reduced because the rubber connecting sheet or the rubber gasket at the position of the compression ring is still positioned; for the second form embodiment, as the isolation form of the lubricating oil from the outside is simplified, namely a single-layer metal connecting sheet is adopted, redundancy is avoided, and the lubricating oil can be used conditionally.

Example three:

as shown in fig. 11-12: the difference from the second embodiment is that: in this embodiment a rubber gasket is used which follows the U-bend of the metal connecting piece 12. It should be noted that, in this embodiment, the rubber gasket 11 may be provided with two layers (as shown in fig. 11) or may be provided with one layer (not shown) only below the metal connecting sheet 12.

The rest is the same as the second embodiment.

Example four:

as shown in fig. 13-14: the difference from the second embodiment is that: in this embodiment a rubber gasket is used which follows the omega bend of the metal web 12. It should be noted that, in this embodiment, the rubber gasket 11 may be provided with two layers (as shown in fig. 13) or may be provided with only one layer (not shown) below the metal connecting sheet 12.

The above are preferred embodiments of the present invention, and those skilled in the art can make various changes or improvements on the basis of the above embodiments, which should fall within the protection scope of the present invention without departing from the general concept of the present invention.

Claims

1. The utility model provides a diesel engine oil pan oil return opening connection structure which characterized in that:

comprises a metal connecting sheet (12) and a rubber gasket (11);

the metal connecting sheet (12) is annular, the outer ring is fixed between the flow guide sleeve (15) and the oil pan flange (8), and the other inner ring is fixed between the circulation cabin pressing ring (13) and the circulation cabin flange (14);

the middle section of the metal connecting sheet (12) is in a U-shaped bend or omega-shaped bend shape;

the rubber gasket (11) is arranged on at least the lower side connecting surface of the metal connecting sheet (12).

2. The diesel engine oil pan oil return port connection structure according to claim 1, characterized in that: the oil pan compression ring (7) is also arranged; the oil pan flange (8) is provided with corresponding bolt holes, and the oil pan clamp ring (7), the air guide sleeve (15), the metal connecting sheet (12) and the oil pan clamp ring (7) are sequentially connected and fixed through the hold-down bolts.

3. The diesel engine oil pan oil return port connection structure according to claim 2, characterized in that: and the circulating cabin compression ring (13), the metal connecting sheet (12) and the circulating cabin flange (14) are sequentially connected and fixed through the compression bolts.

4. The diesel engine oil pan oil return port connection structure according to claim 1, characterized in that: the upper side connecting surface of the metal connecting sheet (12) is also provided with a rubber gasket (11).

5. The diesel engine oil pan oil return port connection structure according to claim 1, characterized in that: the convex part of the U-shaped bend or the omega-shaped bend is downward.