CN104061321B - A kind of heavy-duty power transmission lubricating system - Google Patents

Abstract

The invention provides a heavy-duty gearbox lubrication system, which includes oil pump I and oil pump II, the oil suction port I of oil pump I is connected with the main gearbox, the oil outlet I is connected with the auxiliary gearbox through oil pipes, and the oil suction port II of oil pump II It is connected with the auxiliary gearbox, and the oil outlet II is connected with the main gearbox through the oil pipe. Through this structural form, the oil pump I absorbs oil from the main gearbox to provide the auxiliary gearbox with the lubricating oil required for forced lubrication, and the oil pump II draws oil from the auxiliary gearbox. The gearbox oil suction provides the lubricating oil required for the forced lubrication of the main gearbox. Compared with the lubricating system in the existing gearbox, the lubricating oil flow speed is accelerated, the lubricating effect is better, and the temperature of the parts in the box can be better reduced, and the cooling effect is better, which greatly improves the Transmission reliability and service life.

Description

A heavy-duty gearbox lubrication system

technical field

The invention relates to a heavy-duty gearbox, in particular to a heavy-duty gearbox lubricating system.

Background technique

Splash lubrication is based on the fact that when the rotating parts sealed in the chassis rotate at a high speed, the lubricating oil is splashed and atomized from oil droplets into small droplets, and brought to the friction pair to form automatic lubrication, or concentrated in the oil collector first , and then flow into the lubricating part through the designed oil channel.

Forced lubrication means that an oil pump provides pressure to circulate the lubricating oil under pressure, then cools back to the oil tank, and then enters the oil pump.

When designing the conventional gearbox assembly, there are two ways of lubrication in the box, one is splash lubrication, and the other is splash lubrication + forced lubrication. Generally, only one oil pump is designed for forced lubrication, and the oil suction port sucks oil from the front end of the main gearbox, mainly to lubricate the auxiliary gearbox.

During the normal operation of the gearbox assembly, the main gearbox is lubricated by splash lubrication, and the auxiliary gearbox is lubricated by the oil pump. The combination of the two can realize the lubrication inside the gearbox. However, when the vehicle is working on a slope, due to the large slope conditions, a large amount of lubricating oil is located in the auxiliary gearbox, and often the oil pump cannot absorb oil at the front end of the main gearbox. At this time, most parts of the auxiliary gearbox are immersed in the Lubricating oil, but the gears in the main gearbox can no longer be splash lubricated, and the lubrication effect is not ideal, which affects the reliability of the gearbox and reduces the service life of the gearbox. This is the deficiency of the existing technology .

Contents of the invention

The technical problem to be solved by the present invention is to provide a heavy-duty gearbox lubrication system for the deficiencies in the prior art. The lubrication system adopts double-pump lubrication, which has a good lubrication effect and effectively improves the reliability of the gearbox. sex and longevity.

This solution is realized through the following technical measures: the heavy-duty gearbox lubrication system includes oil pump I and oil pump II, the oil suction port I of the oil pump I is connected to the main gearbox, and the oil outlet I is connected to the auxiliary gearbox through oil pipes, The oil suction port II of the oil pump II is connected to the auxiliary gearbox, and the oil outlet II is connected to the main gearbox through an oil pipe.

The above-mentioned oil suction port I is arranged at the front of the main gearbox.

The above-mentioned oil suction port II is arranged on the front part of the sub-transmission.

The above-mentioned oil outlet I is connected with the inner pipe I and the oil pipe II through the oil pipe I, and the inner pipe I and the oil pipe II are connected in parallel.

The above-mentioned oil pipe II is connected with the inner pipe III in the tank.

The above-mentioned oil suction port II is connected with the oil pump II through the oil pipe V.

The above-mentioned oil outlet II is connected with the inner pipe IV and the oil pipe III through the oil pipe IV, and the inner pipe IV and the oil pipe III are connected in parallel.

The above-mentioned inner pipe IV is connected with the inner pipe II through the oil pipe III.

Radial oil holes are processed on the side wall of the tube IV in the above-mentioned box.

The beneficial effect of this scheme can be known from the description of the above scheme. In this heavy-duty gearbox lubrication system, the oil suction port I of the oil pump I is connected with the main gearbox, the oil outlet I is connected with the auxiliary gearbox through the oil pipe, and the oil pump II is connected to the auxiliary gearbox. The oil suction port II is connected to the auxiliary gearbox, and the oil outlet II is connected to the main gearbox through the oil pipe. Through this structure, the oil pump I sucks oil from the main gearbox to provide the auxiliary gearbox with the lubricating oil required for forced lubrication, and the oil pump Ⅱ Suction oil from the auxiliary gearbox to provide the lubricating oil required for forced lubrication of the main gearbox. Compared with the lubricating system in the existing gearbox, this lubricating system has faster flow speed of lubricating oil, better lubricating effect, and can better reduce the temperature of parts in the box, and its cooling effect is better, which greatly improves the Transmission reliability and service life. It can be seen that, compared with the prior art, the present invention has outstanding substantive features and remarkable progress, and the beneficial effects of its implementation are also obvious.

Description of drawings

Fig. 1 is a schematic structural diagram of a specific embodiment of the present invention.

Fig. 2 is a sectional view of A-A in Fig. 1 .

In the figure, A-main gearbox, B-auxiliary gearbox, 1-oil pipe Ⅱ, 2-inner pipe Ⅰ, 3-oil pipe Ⅰ, 4-oil outlet Ⅰ, 5-oil pump Ⅰ, 6-oil suction port Ⅰ, 7-oil suction port Ⅱ, 8-oil pipe Ⅴ, 9-oil pump Ⅱ, 10-oil outlet Ⅱ, 11-oil pipe Ⅳ, 12-inner pipe Ⅳ, 13-inner pipe Ⅲ, 14-oil pipe Ⅲ, 15-box Inner tube II.

detailed description

In order to clearly illustrate the technical characteristics of this solution, the following will describe this solution through specific implementation modes and in conjunction with the accompanying drawings.

A heavy-duty gearbox lubrication system, as shown in the figure, it includes oil pump I5 and oil pump II9, oil pump I5 and oil pump II9 are installed at the front end of the left countershaft and right countershaft respectively, and the oil suction port I6 of the oil pump I5 is installed at the main gearbox At the front of A, the oil suction port II7 of the oil pump II9 is set at the front of the auxiliary gearbox B. The lubrication system is a double oil pump lubrication system. The oil pump I5 mainly provides forced lubrication for the auxiliary gearbox B, specifically, it mainly provides forced lubrication for the auxiliary gearbox synchronizer and the auxiliary gearbox planetary gear train in the auxiliary gearbox B; the oil pump Ⅱ9 is mainly to provide forced lubrication for the main gearbox A. Specifically, it mainly provides forced lubrication for the main gearbox gear and the main shaft gear spacers in the main gearbox A. Especially when the main gearbox is working on a slope, the main gearbox A cannot achieve For splash lubrication, the normal meshing transmission of the gears must be ensured by adding forced lubrication, and the oil pump II9 ensures the realization of forced lubrication in the main gearbox A.

Among them, the oil suction port I6 of the oil pump I5 is connected with the main gearbox A, and the oil outlet I4 is connected with the auxiliary gearbox B through the oil pipe. The pipe I2 is connected with the oil pipe II1, the inner pipe I2 is connected with the oil pipe II1 in parallel, and the oil pipe II1 is connected with the inner pipe III13.

The oil suction port Ⅱ7 of the oil pump Ⅱ9 is connected to the auxiliary gearbox B, the oil outlet Ⅱ10 is connected to the main gearbox A through the oil pipe, the oil suction port Ⅱ7 is set at the front of the auxiliary gearbox B, and the oil suction port Ⅱ7 is connected to the oil pump Ⅱ9 through the oil pipe Ⅴ8. The oil outlet II10 is connected with the tank pipe IV12 and the oil pipe III14 through the oil pipe IV11, the tank pipe IV12 is connected with the oil pipe III14 in parallel, and the tank pipe IV12 is connected with the tank pipe II15 through the oil pipe III14.

Among them, the oil pipe I3 transports the lubricating oil in the oil pump I5 to the inner pipe I2 and the oil pipe II1; the oil pipe II1 transports the lubricating oil to the inner pipe III13; The lubricating oil from the oil pump II9 is sent to the tank pipe IV12 and the oil pipe III14; the oil pipe V8 is the oil inlet pipe of the oil pump II9, and the lubricating oil sucked from the auxiliary gearbox B is sent to the oil pump II9.

Pipe Ⅰ2 in the box is used to deliver the lubricating oil in the oil pump Ⅰ5 to the left idler shaft to lubricate the needle roller bearing at the shaft of the left idler; the pipe Ⅱ15 in the box is used to deliver the lubricating oil in the oil pump Ⅱ9 to the input shaft and the oil hole of the main shaft , to lubricate the spacer assembled on the main shaft; the box inner pipe III13 is installed on the upper part of the main gearbox A, and is used to transport the lubricating oil in the oil pump I5 to the auxiliary gearbox B to lubricate the planetary gear train in the auxiliary gearbox B; the box The inner pipe IV12 is installed on the upper part of the main gearbox A, and is used to deliver the lubricating oil in the oil pump II9 to the main gearbox A, and the side wall of the inner pipe IV12 is processed with radial oil holes, which are used for the main gearbox A. Spray the gears of the main gearbox A to lubricate the gears in the main gearbox A.

Both the main gearbox A and the auxiliary gearbox B adopt the traditional splash lubrication + double oil pump forced lubrication, which solves the problems of unsatisfactory lubrication effect and low service life of heavy-duty gearboxes in the prior art. At the same time, lubricating oil passages are added in the gearbox, and lubricating oil holes are provided at the parts that need to be lubricated to increase the reliability of lubrication. Compared with the lubricating system in the existing gearbox, the lubricating system has better lubricating and cooling effects, effectively reduces the oil temperature, and greatly improves the working reliability and service life of the gearbox.

The technical features not described in the present invention can be realized by existing technologies, and will not be repeated here. The above is only a preferred embodiment of the present invention, and the present invention is not limited to the above-mentioned specific implementation, and changes, modifications, additions or replacements made by those of ordinary skill in the art within the essential scope of the present invention should also belong to protection scope of the present invention.

Claims (9)

1. A heavy-duty gearbox lubrication system, characterized in that it includes an oil pump I and an oil pump II, the oil suction port I of the oil pump I is connected to the main gearbox, and the oil outlet I is connected to the auxiliary gearbox through an oil pipe. The oil suction port II of the oil pump II is connected with the auxiliary gearbox, and the oil outlet II is connected with the main gearbox through the oil pipe. 2. The heavy-duty gearbox lubrication system according to claim 1, characterized in that: the oil suction port I is arranged at the front of the main gearbox. 3. The heavy-duty gearbox lubrication system according to claim 2, characterized in that: the oil suction port II is arranged at the front of the auxiliary gearbox. 4. The heavy-duty gearbox lubrication system according to claim 3, characterized in that: the oil outlet I is connected to the inner pipe I and the oil pipe II through the oil pipe I, and the inner pipe I and the oil pipe II are connected in parallel. 5. The heavy-duty gearbox lubrication system according to claim 4, characterized in that: the oil pipe II is connected to the tank inner pipe III. 6. The heavy-duty gearbox lubrication system according to claim 3, characterized in that: the oil suction port II is connected to the oil pump II through the oil pipe V. 7. The heavy-duty gearbox lubrication system according to claim 6, characterized in that: the oil outlet II is connected to the tank pipe IV and the oil pipe III through the oil pipe IV, and the tank pipe IV and the oil pipe III are connected in parallel. 8. The heavy-duty gearbox lubrication system according to claim 7, characterized in that: the inner pipe IV is connected to the inner pipe II through the oil pipe III. 9. The heavy-duty gearbox lubrication system according to claim 8, characterized in that: radial oil holes are processed on the side wall of the inner tube IV in the tank.