CN110005502A - Marine low-speed oil sump enhanced cooling device - Google Patents

Abstract

The purpose of the present invention is to provide an enhanced cooling device for marine low-speed oil sump, including an oil sump, an oil inlet is arranged on the outer wall of the upper end of the oil sump, an oil discharge port is arranged on the outer wall of the lower end of the oil sump, and a cooling device is arranged in the oil sump. In the water pipeline, the cooling water inlet of the cooling water pipeline is located outside of one side of the oil pan, the cooling water outlet of the cooling water pipeline is located outside the other side of the oil pan, the cooling water pipeline is located on the inner wall of the bottom surface of the oil pan, and the cooling water pipe The outer wall of the oil pan is provided with annular fins of cooling water pipes, and the inner wall of the bottom surface of the oil pan is provided with enhanced heat exchange grooves. The guide turbine of the present invention avoids the current situation in which the hot lubricating oil cannot be cooled at the upper layer in the existing cooling method, while the lubricating oil with a lower temperature is cooled at the bottom. Annular fins are arranged outside the water-cooling pipe, and no equipment is added in the limited space, which effectively enhances the heat exchange. The grooves on the bottom plate of the oil pan are arranged so that the lubricating oil at the bottom of the oil pan can be cooled by the surrounding air.

Description

Marine low-speed oil sump enhanced cooling device

technical field

The invention relates to a marine diesel engine, in particular to a diesel oil pan cooling device.

Background technique

Internal combustion engine is a very important power machine, which is widely used in many fields of industrial production and social life. Among them, diesel engine is an important branch of internal combustion engine, and has an irreplaceable position in the power of transportation tools, agricultural machinery and construction machinery.

The function of the oil pan is that the closed crankcase can prevent the entry of other impurities, and collect and store the lubricating oil flowing back between the moving pairs of the diesel engine, dissipate part of the heat, and prevent the oxidative degeneration of the lubricating oil.

With the continuous improvement of the engine strengthening degree, the heat load is getting higher and higher, which can easily lead to the high temperature of the lubricating oil, which will affect the lubrication effect of the engine, and even lead to the failure of lubrication, which will affect the power economy and reliability of the engine.

In the oil pan of the diesel engine, the density of the hot lubricating oil decreases due to the increase of temperature, and is concentrated in the upper layer, while the cold oil is in the lower layer. The existing cooling device of the diesel oil pan is only concentrated in the lower part of the diesel oil pan. Cooling, so that the lubricating oil in the oil pan cannot be effectively cooled. The hidden dangers caused by the high lubricating oil temperature still exist.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a marine low-speed oil sump enhanced cooling device with strong versatility and remarkable cooling effect.

The object of the present invention is achieved in this way:

The marine low-speed oil sump enhanced cooling device of the present invention is characterized in that it includes an oil sump, an oil inlet is arranged on the outer wall of the upper end of the oil sump, an oil discharge port is arranged on the outer wall of the lower end of the oil sump, and a cooling device is arranged in the oil sump. In the water pipeline, the cooling water inlet of the cooling water pipeline is located outside of one side of the oil pan, the cooling water outlet of the cooling water pipeline is located outside the other side of the oil pan, the cooling water pipeline is located on the inner wall of the bottom surface of the oil pan, and the cooling water pipe The outer wall of the oil pan is provided with annular fins of cooling water pipes, and the inner wall of the bottom surface of the oil pan is provided with enhanced heat exchange grooves.

The present invention can also include:

1. The bottom of the oil pan is equipped with a guide turbine that guides the upper oil into the lower part of the oil pan and sends the lower oil to the upper part.

2. The upper part of the oil pan is provided with a wind and wave baffle along its longitudinal direction.

The advantages of the present invention are:

1. A new guide turbine is added, so that the hot lubricating oil can be effectively cooled. In the existing cooling method, the current situation in which the hot lubricating oil cannot be cooled at the upper layer and the lubricating oil with a lower temperature is cooled at the bottom is avoided.

2. The annular fins are set outside the water-cooling pipe, and no equipment is added in the limited space, which effectively enhances the heat exchange.

3. The grooves on the bottom plate of the oil pan are arranged so that the lubricating oil at the bottom of the oil pan can be cooled by the surrounding air.

Description of drawings

Fig. 1 is a schematic diagram of annular fins and heat exchange grooves;

Figure 2 is a schematic diagram of an oil pan with a diversion turbine added;

FIG. 3 is an overall schematic diagram of the present invention.

Detailed ways

The present invention will be described in more detail below in conjunction with the accompanying drawings:

1-3, the marine low-speed oil sump reinforced cooling device of the present invention mainly includes: an oil inlet 1, an oil discharge port 2, a cooling water inlet 3, a cooling water outlet 4, an anti-wave ring groove 5, an oil sump reinforcement Ribs 6, oil pan bolt holes 7, diversion turbine 8, enhanced heat exchange grooves 9, cooling water pipe annular fins 10.

The upper part of the oil pan is provided with an anti-wind and wave baffle 5, and the floor of the oil pan is provided with a reinforced heat exchange groove 9, which are combined with each other to prevent the oil in the oil pan from leaking due to the turbulent sea wind and waves.

The rectangular groove 9 in the lower part of the oil pan becomes a fin for heat exchange between the lower part of the oil pan and the air, which strengthens the convection heat exchange and radiation heat exchange between the bottom plate of the oil pan and the air.

The water-cooling pipes at the lower part of the oil pan make reasonable use of the seawater at sea for heat exchange, and a ring of annular fins is added outside the heat-exchange pipes, which helps to strengthen the heat exchange between the water-cooling pipes and the lubricating oil.

In the present invention, two diversion turbines are arranged at the bottom of the traditional diesel oil pan, and the two turbines are used to introduce the lubricating oil with higher temperature in the upper layer of the oil pan into the lower part of the oil pan for centralized cooling, and then the oil pan is cooled. The cooled oil in the lower layer is sent to the upper layer of the oil pan.

The invention transforms the design of the bottom plate of the traditional oil pan, and sets multiple grooves on the bottom plate at the bottom of the oil pan. The addition of the grooves can deepen the liquid level in the oil pan and prevent the occurrence of wind and waves at sea. Causes the oil in the oil pan to shake and spill out causing oil loss. In addition, the grooves form cooling ribs on the outside of the oil pan bottom plate, so that the oil pan bottom plate can dissipate heat with the help of the surrounding air.

In order to achieve the above effect of strengthening heat exchange, in addition to the above measures, the present invention also sets a seawater cooling water pipeline at the bottom of the oil pan, and sets annular fins outside the cooling water pipeline to strengthen the relationship between the cooling water and the hot lubricating oil. heat exchange between.

As shown in FIG. 3 , the hot lubricating oil enters the oil pan from the oil inlet 1 and is then sucked into the bottom of the oil pan by the guide turbine 8 . The hot lubricating oil is cooled at the bottom of the oil pan by cooling water pipes with annular fins 10 and rectangular grooves 9 in the bottom of the oil pan. The cooling seawater in the cooling water pipeline enters from the cooling water inlet 3 and flows out from the cooling water pipeline 4 after cooling the lubricating oil. The cooled lubricating oil flows out from the oil discharge port 2.

The concrete principle of the present invention is:

The lubricating oil with higher temperature accumulates in the upper layer of the oil pan due to its low density, and cannot be effectively cooled by the cooling device located in the oil pan. Therefore, the present invention adopts two guide turbines to suck the hot lubricating oil from the upper part. , and the cooling device at the lower part is ribbed and strengthened to achieve a more efficient cooling effect of lubricating oil.

Claims (3)

1. marine low-speed oil pan strengthens cooling device, it is characterized in that: including oil sump, it is arranged on the outer wall of oil sump upper end Oil inlet is arranged oil discharge outlet on the outer wall of oil sump lower end, cooling water pipeline, the cooling water of cooling water pipeline is arranged in oil sump Import is located at the outside of oil sump side, and the cooling water outlet of cooling water pipeline is located at the outside of the oil sump other side, cooling water Pipeline is located on the bottom surface inner wall of oil sump, and cooling water pipe annular fin, the bottom surface of oil sump are arranged on the outer wall of cooling water pipe Enhanced heat exchange groove is arranged in inner wall.

2. marine low-speed oil pan according to claim 1 strengthens cooling device, it is characterized in that: the bottom inside oil sump Upper layer lubricating oil is imported crankcase pit bottom section and send lower layer's lubricating oil to the water conservancy diversion turbine on top by portion's setting.

3. marine low-speed oil pan according to claim 1 or 2 strengthens cooling device, it is characterized in that: oil sump is upper Wind wave prevention baffle is arranged in part along itself longitudinal direction.