CN201071826Y - Sealing structure for turbosupercharger - Google Patents

Abstract

The utility model relates to a seal structure of a turbocharger, which is characterized in that a gas compressor is sealed by a V-shaped obturating ring disposed on the outer coating of a rotor spindle in a choke plug seat; the head face of a carbon seal ring is seamlessly stuck with the supporting head face of the rotor spindle; the head face of the carbon seal ring and the head face of the rotor spindle are softly and tightly combined through a low pressure spring and a spring blade positioned in the choke plug seat. The utility model overcomes the problems that the sealability of the turbocharger is insecure and the oil leaks easily in prior art. The carbon seal ring is seamlessly combined with the rubber obturating ring, so that the sealing quality of the turbocharger is ensured, oil leakage is eliminated and the service life of the turbocharger is prolonged. Therefore, the turbocharger can work in optimum state.

Description

Turbocharger seal structure

technical field

The utility model relates to a turbocharger sealing technology, in particular to a turbocharger graphite sealing structure.

Background technique

Turbocharger is the most effective measure to increase engine power and improve economy, and it is also an inevitable way to strengthen the engine. It has become an important direction for the development of internal combustion engines and is widely used in the fields of miniature cars and heavy trucks. Turbochargers have been As one of the important parts of the engine, it needs to be continuously improved in terms of its performance and durability. The sealing structure of the turbocharger prevents the lubricating oil of the bearing body from entering the circulation part of the supercharger, and prevents the air of the compressor or the gas at the turbine end from entering the lubricating oil chamber of the supercharger, which is an important factor to ensure the normal operation of the supercharger. links. At present, the seals of superchargers mainly include piston ring seals, graphite ring contact seals and lip seals. When the booster throttle of the gasoline engine is closed, the pressure on the back of the compressor impeller will be much lower than the pressure in the bearing body. The impeller works under a relatively large negative pressure, and the pressure difference can be as high as 80kpa. At this time, the piston seal structure cannot guarantee effectiveness. The seal needs to use graphite ring contact seal. Ordinary graphite ring seals are susceptible to thermal backflow and affect the adhesion to the end face of the turbine, and the mechanical loss is large, and the turbine lag is also large. In order to ensure high sealing performance, there are also double-piston ring sealing methods with a relatively complex structure. In a word, the sealing structure has always been the weak link of the turbocharger, which needs continuous improvement to ensure the normal operation of the turbocharger.

Utility model content

The utility model aims at the above-mentioned existing technical problems and provides a turbocharger graphite turbocharger sealing structure with simple structure, reliable sealing performance and small mechanical loss.

The technical scheme of the sealing structure of the turbocharger of the present invention is as follows:

A sealing structure for a turbocharger, including a turbine shell and a compressor impeller, characterized in that: for the seal of the compressor, a V-shaped sealing ring is installed on the outer rotor shaft sleeve in the plugging seat, and the end face of the graphite sealing ring is connected with the supporting end face of the rotor shaft There is no gap in the adhesive connection, and the end face of the graphite sealing ring is softly and tightly combined with the end face of the rotor shaft through the low-pressure spring and the spring stopper set in the cover seat.

Advantage and effect of the present utility model are as follows:

The utility model overcomes the unreliable sealing performance of the turbocharger in the prior art and is prone to oil leakage. The utility model adopts the non-gap sealing of the graphite sealing ring and the non-gap sealing of the rubber sealing ring to ensure that the turbocharger Excellent sealing quality avoids oil leakage, improves the service life of the supercharger, and makes the turbocharger work in the best condition.

Description of drawings

Fig. 1 is a schematic diagram of the sealing structure of the turbocharger of the present invention.

FIG. 2 is a side view of FIG. 1 .

In the figure: 1. V-shaped sealing ring, 2. Graphite sealing ring, 3. Low pressure spring, 4. Spring stopper, 5. Blocking cover seat.

Detailed ways

Describe the utility model in detail below in conjunction with accompanying drawing and specific embodiment.

Example 1

The sealing structure of the turbocharger of the utility model is shown in Figure 1. The compressor is sealed by a sealing method combining graphite and rubber. The end face and the end face of the rotor shaft support are adhesively connected without gaps, and the end face of the graphite sealing ring 2 and the end face of the rotor shaft are softly and tightly combined by the low-pressure spring 3 and the spring stopper 4 set in the cover seat 5 to ensure that the pressure difference is large. Reliable sealing of the compressor in the case of

On the one hand, the V-shaped rubber seal is in close contact with the outer sleeve of the rotor shaft in the cover seat, and on the other hand, it is closely combined with the inner hole of the graphite sealing ring, which acts as a double seal;

The V-shaped sealing ring is made of hydrogenated nitrile rubber, which makes the contact point soft and can change with the contact surface. The production of graphite sealing rings requires that the graphite surface be flat and smooth as a mirror. The low-pressure spring is used to make the elastic force soft and ensure reliable sealing.

Claims (1)

1. seal structure of turbocharger, it is characterized in that the sealing of gas compressor: V-shaped seal ring (1) blanking cover seat (5) inner rotor shaft of packing into puts outward, graphite-seal ring (2) end face and rotor shaft support the gapless adhesion of end face and are connected, soft the combining closely of end face that low pressing spring (3) and the spring stop piece (4) by setting in the blanking cover seat (5) makes graphite-seal ring (2) end face and rotor shaft.

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