Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16J—PISTONS; CYLINDERS; SEALINGS
  • F16J15/00—Sealings
  • F16J15/16—Sealings between relatively-moving surfaces
  • F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16J—PISTONS; CYLINDERS; SEALINGS
  • F16J15/00—Sealings
  • F16J15/16—Sealings between relatively-moving surfaces
  • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
  • F16J15/3404—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
  • F16J15/3408—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16J—PISTONS; CYLINDERS; SEALINGS
  • F16J15/00—Sealings
  • F16J15/16—Sealings between relatively-moving surfaces
  • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
  • F16J15/3404—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
  • F16J15/3408—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface
  • F16J15/3412—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface with cavities
  • F16J15/3416—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface with cavities with at least one continuous groove
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S277/00—Seal for a joint or juncture
  • Y10S277/908—Seal for use in rotating and reciprocating arrangement

Definitions

• the present invention relates to a mechanical seal adapted so as to prevent any leakage of a fluid from a shaft rotating in the interior of a mechanical apparatus having fluids therein, and in particular to an improved mechanical seal which is capable of extending a life span of a mechanical seal based on an abrasion of a sliding surface so that multiple sliding surfaces are formed between a rotor and a stator of a mechanical seal Background Art
• a mechanical seal is a kind of a packing device adapted so as to prevent leakage of fluid from a shaft, which rotates in the interior of a mechanical apparatus having fluid therein.
• the mechanical seal is adapted so as to tightly seal a portion of a rotor rotating together with a shaft in the interior of a mechanical apparatus and a portion of a stator fixed at a gland, so that desired airtight and fluid-tight operations are obtained with a sliding operation.
• a key element in the mechanical seal is a rotor which rotates together with a shaft, and a stator fixed at a gland.
• the rotor and the stator are always closely contacted with each other irrespective of friction during a sliding operation.
• the rotor is controlled to be closer to the stator using a certain pressurizing member such as a coil spring at the backside of the rotor, so that a uniform contact of the rotor is obtained.
• the rotor and the stator are closely contacted based on a pressure of an operation fluid applied from a rear side to the rotor and a force of the pressurizing member, so that it is possible to prevent any leakage of fluid from a sliding part.
• the mechanical seal is made of an anti-abrasion material such as carbon steel, copper alloy or stainless steel, so that the abrasion at the sliding portion is minimized.
• a mechanical seal in which a support member is engaged at a rotary shaft using a fixing means, a rotator having packing is inserted into a rotation shaft, and a pressurizing member such as a coil spring is elastically disposed between the support member and the rotator, and a stator having sliding parts closely contacting with the rotator at one side of the rotator is fixed at the body of the mechanical apparatus having fluids therein, so that sliding is performed in a state that the rotator and the stator are closely contacted based on pressure of the pressurizing member, there is provided a mechanical seal characterized in that sliding parts having at least one multiple sliding surfaces are formed at opposite surfaces of the rotator and the stator.
• Figure 1 is a disassembled perspective view illustrating major elements of the present invention.
• Figure 2 is a lateral cross sectional view of the present invention.
• Figure 3 is a cross sectional view illustrating a construction that multiple sliding portions are provided according to the present invention.
• Figures 4 through 7 are views of other embodiments of the present invention.
• FIG. 1 is a disassembled perspective view illustrating a basic construction of the present invention.
• a support member 20 is fixed at a rotary shaft 10 using a certain fixing member such as a key.
• the rotary shaft 10 and the support member 20 rotate together.
• a pressurizing member 30 is inserted into the rotary shaft 10 so that the pressurizing member 30 like a coil spring is positioned at an inner side.
• the rotor 50 is inserted into the rotary shaft 10 so that the rotor 50 is positioned at an outer side.
• the rotor 30 is provided with a pressure in the direction reverse to the support member based on the pressurizing member 30 like the coil spring disposed between the support member 20 and the rotator 50.
• Double packing 40 and 41 are inserted into the rotary shaft 10 and are positioned at the inner side of the rotor 50 so as to maintain an airtight and fluid-tight operation at the rotator 50 and the rotary shaft 10.
• a stator 60 fixed at the side of the body of various apparatus having fluid such as a pump or a tank is installed at the outer side of the rotor 50.
• the stator 60 is installed so that packing 70 made of a proper material such as silicon or rubber member is inserted between the stator 60 and the body of various apparatuses having fluids therein so as to maintain a fluid tight state between the body and the rotary shaft 10.
• stator 60 and the rotator 50 fixed at the body such as pump or tank having fluids therein are inserted into each rotary shaft 10.
• the rotator 50 maintains a close contact state with the stator 60 by a pressure of the pressurizing member 30 installed between the support member 20 and the rotator 50, with the support member 20 being key-engaged with the rotary shaft 10.
• sliding parts 50a and 60a are formed at the opposite surfaces of the rotator 50 and the stator 60.
• the sliding parts 50a and 60a are provided with at least one, preferably multiple sliding surfaces, so that the abrasion of the sliding surfaces can be extended.
• the sliding parts 50a and 60a are formed at the closely contacting surfaces of the rotator 50 and the stator 60. Protrusions are formed at the surfaces of the sliding parts 50a and 60a.
• at least one sliding surface is provided, so that the abrasion of the sliding surface can be extended based on the rotation of the rotary shaft 10.
• the protrusions of the sliding portions may be selectively adapted to either the rotator 50 or the stator 60. Forming the sliding parts having multiple sliding surfaces at either rotator 50 or stator 60 can prevent abrasions with same effects.
• FIGS 4 through 6 are views of various embodiments of the present invention. As shown therein, the sliding parts 50a and 60a are formed in multiple steps, with the sliding parts being embedded into the rotator 50 or the stator 60.
• the sliding part 50a having one sliding surface is formed in the rotator 50.
• the sliding part 60a of the stator 60 is constructed in a structure that the thickness gets decreased in the direction from the center portion to the outer side.
• the sliding surface positioned at the center of the sliding part 60a slides with the rotator 50 and the sliding part 50a.
• the next thinner sliding surface slides with the rotator 50 and the sliding part 50a.
• the sliding is sequentially performed with the sliding part 60a which is formed with the multiple steps, so that it is possible to significantly extend the life span with respect to the abrasion of the sliding part 60a.
• FIG. 7 is a view of another embodiment of the sliding parts 50a and 60a according to the present invention.
• the sliding parts 50a and 60a of the present invention may be separately fabricated from the rotator 50 or the stator 60 and then may be attached to the same or may be integrally fabricated with the rotator 50 or the stator 60.
• the constructions of the sliding parts 50a and 60a formed at the rotator 50 and the stator 60 according to the present invention may be changed within ranges of multi-step sliding surfaces and may be modified or changed in various shapes.
• the abrasion of the sliding parts of the mechanical seal in which abrasion occurs due to sliding operation may be extended, and the durability and life span of the mechanical seal can be extended. Stable packing effects can be obtained for long time period, and the performance and quality of the products can be enhanced.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Sealing Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (2)

Cited By (2)

Families Citing this family (2)

Citations (3)

• 2004
  • 2004-12-17 KR KR20040107664A patent/KR100709960B1/ko not_active IP Right Cessation
• 2005
  • 2005-12-16 WO PCT/KR2005/004343 patent/WO2006065097A1/en active Application Filing

Patent Citations (3)

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