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Sealing structure for sealing rotary part

A technology of sealing structure and sealing parts, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of increasing manufacturing and processing costs, affecting sealing performance, and high requirements for sealing parts, so as to meet the requirements of low manufacturing and processing accuracy and reduce Low production cost and good sealing performance

Inactive Publication Date: 2018-11-06
WUXI WOERFU AUTO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the requirements for seals are high and it is difficult to achieve complete sealing;
[0003] The traditional sealing method is, on the crankshaft (as shown in the attached drawing of the specification figure 1 and figure 2 As shown), a rubber-coated metal skeleton sealing part is installed on it, which is usually called an oil seal. The inner ring of the oil seal is designed with a series of annular raised sealing lines, which rely on the pressure generated by the interference fit between the sealing line and the rotating shaft. The tight force is used to seal; the disadvantages of this sealing method are:
[0004] 1. Because the shaft parts are constantly rotating during the working process, while the sealing parts are stationary, the relative movement between the two will cause the sealing line of the sealing parts to wear, and after a certain period of work, the seal will be damaged. If it is not strict, it will cause oil leakage;
[0005] 2. Because the tightness between the sealing line and the rotating parts has a great influence on the sealing effect, the sealing method has great influence on the coaxiality, cylindricity, surface roughness, roundness, sealing The line width and the hardness of the sealing material have high requirements, which increases the manufacturing and processing costs;
[0006] 3. If there is a gap or break in one of the annular sealing lines, it will affect the sealing performance

Method used

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  • Sealing structure for sealing rotary part
  • Sealing structure for sealing rotary part
  • Sealing structure for sealing rotary part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as Figure 3-6 As shown, a sealing structure for sealing rotating parts is characterized in that it includes a seal body 1, and a sealing line is provided along the inner wall of the seal body 1,

[0031] The sealing line includes an annular sealing line 2 and a spiral sealing line 3 arranged on the side of the annular sealing line 2 close to the inner cavity of the rotating parts;

[0032] The spiral direction of the spiral sealing line 3 is the same as that of the rotating parts.

[0033] Further, the seal body 1 is sheathed on the outer wall of the rotating shaft 4 .

[0034] Further, the annular sealing line 2 has an annular structure.

[0035] Further, the spiral sealing line 3 has a spiral structure.

[0036] Further, in this embodiment, the rotating shaft 4 is right-handed, and the helical direction of the spiral sealing line 3 is right-handed.

[0037] Further, the sealing structure disclosed in the present invention can be applied to any type of sealin...

Embodiment 2

[0051] The difference from Embodiment 1 is that the rotating shaft 4 is left-handed, and the helical direction of the spiral sealing line 3 is left-handed.

[0052] Compared with the traditional rotating parts, the sealing in the present invention is not simply based on the tight force between the sealing line and the rotating shaft, but mainly depends on the frictional resistance between the side of the sealing line and the oil Yes, as long as the helical direction of the helical sealing line is kept in the same direction as the rotation axis, the sealing can be guaranteed.

[0053] The invention solves the shortcomings of the traditional way of sealing between moving parts, not only reduces the manufacturing and processing cost, but also improves the reliability of the parts.

[0054] The main advantages of the sealing structure for sealing rotating parts provided by the embodiments of the present invention are:

[0055] 1. When the speed of the rotating shaft increases, th...

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PUM

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Abstract

The invention discloses a sealing structure for sealing a rotary part. The sealing structure comprises a sealing part body. A sealing line is arranged along the inner wall of the sealing part body. The sealing line comprises an annular sealing line and a spiral sealing line arranged on the side, close to an inner cavity of the rotary part, of the annular sealing line; and the spiral direction of the spiral sealing line is identical to the rotating direction of the rotary part. The sealing structure disclosed by the invention overcomes the defect of a conventional moving part sealing mode, so that the manufacturing and processing cost is lowered, and the reliability of the part is improved. The sealing structure has good durability and sealing property.

Description

technical field [0001] The invention relates to the technical field of sealing equipment, in particular to a sealing structure for sealing rotating parts. Background technique [0002] At present, the dynamic sealing of rotating parts in the machinery industry is a problem that is not easy to solve. Take the engine crankshaft as an example. The crankshaft is a high-speed rotating shaft part. The middle part is in the oil environment of the inner cavity, and the end part needs to drive other parts. It generates power output and is in an oil-free outer cavity environment, so sealing parts are required at the front and rear ends for sealing. However, the requirements for seals are high and it is difficult to achieve complete sealing; [0003] The traditional sealing method is, on the crankshaft (as shown in the attached drawing of the specification figure 1 and figure 2 As shown), a sealing part with metal skeleton structure covered with rubber is installed on it, which is ...

Claims

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Application Information

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IPC IPC(8): F16J15/16
CPCF16J15/16
Inventor 张侠
Owner WUXI WOERFU AUTO TECH CO LTD