Reciprocating type magnetic liquid self-circulating lubrication sealing device

A magnetic liquid and sealing device technology, which is applied in the direction of engine sealing, engine lubrication, engine components, etc., can solve problems such as safety threats, missing devices, and malfunctioning staff, so as to improve service life, reduce and prevent leakage, The effect of reducing leakage

Active Publication Date: 2017-03-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For continuous reciprocating motion machinery, during the reciprocating motion of the piston, the lubricant or sealant will be thrown away from the action area under the action of inertia; security threat

Method used

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  • Reciprocating type magnetic liquid self-circulating lubrication sealing device
  • Reciprocating type magnetic liquid self-circulating lubrication sealing device
  • Reciprocating type magnetic liquid self-circulating lubrication sealing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] like figure 1 As shown, a reciprocating magnetic liquid self-circulating lubrication sealing device includes a piston shaft 1, a magnetic liquid lubricant 3, a ring magnet 5, a piston 8 and a cylinder 9;

[0035] The piston 8 includes a piston middle part 8a, a piston end part I8b and a piston end part II8c; the piston middle part 8a is spindle-shaped, and the middle section has the largest diameter and is cylindrical in shape, and the middle section accounts for 30% of the total length of the piston middle part 8a, extending to both ends of the piston middle part 8a The diameter gradually decreases; the two ends of the middle part of the piston 8a are respectively connected with the piston end I8b and the piston end II8c, and the connection forms an angle α of 70°; the piston end I8b is connected with the piston shaft 1;

[0036] The piston 8 is placed inside the cylinder 9, and the inner diameter of the cylinder 9 is 16mm. There is a 2.65×2.65mm annular groove 4 in t...

Embodiment 2

[0039] With reference to the structure of embodiment 1, the difference between the present embodiment and embodiment 1 is that the section of the ring magnet 5 is an isosceles triangle with an apex angle of 120°, the magnetic field strength in the middle of the magnet is greater than that on both sides, and the scattered magnetic liquid lubricant 3 droplets are captured by the magnet. After capture, snap to the center from both sides, such as Figure 4 shown.

Embodiment 3

[0041] Referring to the structure of Embodiment 1, the difference between this embodiment and Embodiment 1 is that the angle α between the middle part of the piston 8a and the connection between the piston end I8b and the piston end II8c is 45°, and the piston end I8b and the piston end II8c are close to the gap 2 One side protrudes to form a sharp corner, such as Figure 5 As shown, reducing the angle α can prevent lubricant leakage more effectively.

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PUM

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Abstract

The invention relates to a reciprocating type magnetic liquid self-circulating lubrication sealing device which comprises annular magnets, a piston, an air cylinder and the like. The middle portion of the piston is fusiform, an angle alpha is formed at the joint of the middle portion and each end, annular grooves are formed in the middle portion, and an O-shaped sealing ring and a piston ring are arranged in each annular groove. The annular magnets are arranged on the outer side of the air cylinder and located at the middle point of reciprocating movement of the piston. The reciprocating type magnetic liquid self-circulating lubrication sealing device is compact in structure, the working conditions of the high pressure and high speed can be met, leakage and losses of a lubricant can be effectively reduced and stopped, the service life of the piston rings is prolonged, and the sealing effect of the piston rings is improved; and no special requirement exists for the movement direction of the piston.

Description

technical field [0001] The invention belongs to the field of reciprocating motion machines, in particular to a reciprocating magnetic liquid self-circulating lubrication and sealing device, which can be used in reciprocating machines such as internal combustion engines, air-conditioning systems, and heavy machinery bearings. Background technique [0002] The magnetic liquid is a colloidal suspension composed of nano-magnetic particles, a base carrier liquid and a surfactant, and is a functional fluid with both magnetism and fluidity. Due to the unique properties of magnetic liquids, magnetic liquids are widely used as sealants and lubricants. Most of these applications achieve static or rotary seals through magnetic liquids, such as vacuum seals and rotary motors; magnetic liquids are used in There are few reciprocating mechanical structures, and most of the magnetic liquid sealing structures cannot realize the self-circulation of magnetic liquid. [0003] Reciprocating mac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/53F16N15/00
CPCF16J15/43F16N15/00
Inventor 刘菁晗何永清宋鹏云
Owner KUNMING UNIV OF SCI & TECH
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