CN205744444U - A kind of engine with supercharger oil-sealed rotary pump - Google Patents

Abstract

In order to overcome the problem that the lubricating oil circuit of the existing mechanical vacuum pump is usually connected by a rubber hose, the cost is high, and the rubber hose is easy to age and affect the lubrication effect, the utility model provides a mechanical vacuum pump for a booster engine, which is characterized in that the vacuum pump body With an elliptical pump chamber, the vacuum pump body has a suction port connected to the pump chamber. The rear part of the cylindrical drive shaft whose axis deviates from the center of the pump chamber extends into the pump chamber through the bottom surface of the mechanical vacuum pump. The drive shaft The front part extends out of the vacuum pump body, and the drive shaft rotates relative to the vacuum pump body. There is a blade groove on the part of the shaft body where the drive shaft extends into the pump chamber, and a movable blade is inserted into the blade groove. The oil inlet is located in the vacuum pump. The bottom surface is docked with the main oil passage of the engine, and the oil outlet is located on the bottom surface of the vacuum pump, which is docked with the oil return port of the engine; the utility model is reasonable in design, simple and reliable in structure, easy to process, and low in cost. vacuum source.

Description

Mechanical vacuum pump for supercharged engine

technical field

The utility model belongs to the technical field of mechanical vacuum pumps for automobile booster engines, and is a mechanical vacuum pump designed for various passenger cars, light vehicles and miniature vehicles.

Background technique

Along with the increasing requirements for the quality of human life and the rapid progress of the automobile industry, automobiles have gradually evolved into an indispensable means of transportation for people in their daily life and work. While enjoying the convenience that cars bring to our lives, the safety performance of cars has also attracted more and more attention from consumers.

In consideration of alleviating the driver's driving intensity, most current cars are equipped with a vacuum booster in the service braking system. The principle of the vacuum booster to generate power is to rely on the adjustment of the vacuum valve and the air valve to generate a pressure difference between the inner and outer chambers to provide the power boosting function. Therefore, the vacuum inner chamber needs to maintain a certain degree of vacuum and can quickly recover when the vacuum is broken. Filling, so as to continue to produce power-assisted function. For a traditional gasoline engine, the servo air chamber is connected to the engine intake pipe vacuum line, and the vacuum generated by the engine during the intake stroke is used to provide a vacuum source. For gasoline turbocharged engines or gasoline direct injection engines, the intake manifold cannot guarantee stable and reliable vacuum negative pressure, so a vacuum pump is required.

The vehicle vacuum pump is also called the vacuum booster pump. Its main function is to provide vacuum for the vacuum booster device of the vehicle braking system, so as to reduce the fatigue of the driver and ensure that the vehicle braking system can provide sufficient braking force.

At present, the servo braking system in the automotive industry uses vacuum pumps as the external vacuum source. The main types are single-vane vacuum pumps, multi-vane vacuum pumps and reciprocating vacuum pumps.

Contents of the invention

The lubricating oil circuit of the existing mechanical vacuum pump is usually connected by a rubber hose, which is expensive, and the rubber hose is easy to age, which affects the lubrication effect. In order to overcome the problems referred to above, the technical solution of the utility model is achieved in this way:

A mechanical vacuum pump for a supercharged engine is a single vane mechanical vacuum pump, comprising a vacuum pump body, a pump cover covered on the top surface of the vacuum pump body, a drive shaft and blades, and is characterized in that the vacuum pump body has an oval pump The pump body of the vacuum pump has a suction port connected with the pump chamber, the rear part of the cylindrical drive shaft whose axis deviates from the center of the pump chamber penetrates the bottom surface of the mechanical vacuum pump and extends into the pump chamber, and the front part of the drive shaft extends out of the vacuum pump. Outside the body, the drive shaft rotates relative to the vacuum pump body. There is a blade groove on the part of the shaft body where the drive shaft extends into the pump chamber. A movable blade is inserted into the blade groove. The oil inlet is located on the bottom surface of the vacuum pump, which is connected with the main engine The oil passage is connected, and the oil outlet is located on the bottom surface of the vacuum pump, and connected with the oil return port of the engine.

Further technical solutions include:

There are three mounting holes on the bottom surface of the mechanical vacuum pump, and the vacuum pump body is fixed on the engine cylinder head through the mounting holes.

A strainer and a sealing ring are installed between the oil inlet and the main oil passage of the engine cylinder head.

Compared with prior art, the beneficial effect of the present invention:

The oil inlet is directly connected to the main oil passage on the engine, which reduces the cost, avoids the poor lubrication caused by the aging of the hose, and improves the reliability of the lubrication. It has the characteristics of reasonable design, simple and reliable structure.

Description of drawings

Fig. 1 is the structural representation of mechanical vacuum pump assembly of the present utility model;

Fig. 2 is a structural schematic diagram of the bottom surface of the pump body of the mechanical vacuum pump of the present invention;

Fig. 3 is a structural schematic diagram of the pump cover of the mechanical vacuum pump of the present invention;

Fig. 4 is a schematic diagram of the structure of the exhaust port of the mechanical vacuum pump of the present invention;

Fig. 5 is a schematic diagram of the structure of the pump chamber of the mechanical vacuum pump of the present invention;

In the figure: 1. Vacuum pump body, 2. Oil inlet, 3. Oil outlet, 4. Pump chamber, 5. Drive shaft, 6. Bottom surface of mechanical vacuum pump, 7. Blade groove, 8. Blade, 9. Sealing ring , 10. Filter screen, 11. Mounting hole, 12. Suction port, 13. Pump cover, 14. Bolt.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described further:

The mechanical vacuum pump for a supercharged engine of the invention provides vacuum for a vacuum booster of an automobile, has the characteristics of reasonable design, simple and reliable structure, convenient processing, and low cost, and is a reliable vacuum source for automobiles.

In this embodiment, as shown in FIG. 1 , a mechanical vacuum pump for a booster engine according to the present invention is a single-vane mechanical vacuum pump. An oil inlet 2 and an oil outlet 3 are opened on the vacuum pump body 1 respectively, and the oil inlet 2 and the oil outlet 3 are located on the same side of the vacuum pump body 1 . There are also three mounting holes 11 on this side, through which the vacuum pump body 1 can be reliably connected to the engine cylinder head.

In this embodiment, as shown in Figure 5, the vacuum pump body 1 has an elliptical pump chamber 4, and the vacuum pump body 1 has an air suction port 12 communicated with the pump chamber 4, and the cylindrical drive shaft 5 is opposite to the elliptical pump chamber. The center of 4 is arranged eccentrically. As shown in FIG. 4 , the pump cover 13 is connected with the vacuum pump body 1 through four bolts 14 . As shown in FIG. 1 , the drive shaft 5 can rotate relative to the vacuum pump body 1 , and the rear part of the drive shaft 5 passes through the bottom surface 6 of the mechanical vacuum pump and extends out of the vacuum pump body 1 . A groove is processed at the end of the camshaft of the engine, which matches the shape of the end of the drive shaft 5 of a mechanical vacuum pump for a booster engine according to the present invention, so as to drive the vacuum pump to operate, thereby generating vacuum. As shown in FIG. 5 , the drive shaft is provided with a vane groove 7 , and a movable vane 8 is inserted into the vane slot 7 , which cooperates with the drive shaft 5 to rotate at high speed in the pump chamber 4 . As shown in FIG. 5 , when the vanes 8 and the drive shaft 5 rotate in the pump chamber 4 , the pump chamber 5 is divided into three spaces with variable volumes. As shown in Figure 2, the oil inlet 2 of the vacuum pump communicates with the main oil passage of the cylinder head, and a sealing ring 9 and a filter screen 10 are installed therebetween. When the vacuum pump is running, the oil pump of the engine delivers the oil to the oil passage to lubricate the various parts of the engine; at the same time, the oil enters the vacuum pump body 1 through the oil inlet 2; Cover the oil return hole to flow back to the oil pan.

In this embodiment, the air suction port 12 is connected with the automobile vacuum booster through a vacuum hose, and is fixed by an elastic clip.

The working principle of this embodiment is as follows: when the engine is working, the vacuum pump starts to generate vacuum driven by the drive shaft 5 . The lubricating oil with pressure enters the pump body 1 of the vacuum pump through the oil inlet 2, and after lubricating the vacuum pump, the lubricating oil enters the oil pan through the oil outlet 3, and the lubrication is convenient and reliable.

Claims (3)

1. A mechanical vacuum pump for a booster engine, which is a single vane mechanical vacuum pump, comprising a vacuum pump body (1), a pump cover (13), a drive shaft (5) and blades covered on the top surface of the vacuum pump body (1) (8), characterized in that the vacuum pump body (1) has an elliptical pump chamber (4), and the vacuum pump body (1) has a suction port (12) connected to the pump chamber (4), and the axis deviates from The rear part of the cylindrical driving shaft (5) in the center of the pump chamber (4) extends into the pump chamber (4) through the bottom surface (6) of the mechanical vacuum pump, and the front part of the driving shaft (5) extends out of the vacuum pump body (1 ), the drive shaft (5) rotates relative to the vacuum pump body (1), and the part of the drive shaft (5) extending into the pump chamber (4) has a vane groove (7), and the vane groove (7) A movable vane (8) is inserted inside, the oil inlet (2) is located on the bottom surface (6) of the vacuum pump, and is connected with the main oil passage of the engine, and the oil outlet (3) is located on the bottom surface (6) of the vacuum pump, connected to the oil return of the engine Mouth butt. 2. A mechanical vacuum pump for a supercharged engine according to claim 1, characterized in that the bottom surface (6) of the mechanical vacuum pump has three mounting holes (11), and the vacuum pump body (1) is fixed through the mounting holes (11) on the engine cylinder head. 3. The mechanical vacuum pump for a supercharged engine according to claim 1, characterized in that a filter screen (9) and a sealing ring (10) are installed between the oil inlet (2) and the main oil passage of the engine cylinder head .