WO2008025220A1 - Élément de protection de palier à manchon à deux bagues - Google Patents

Élément de protection de palier à manchon à deux bagues Download PDF

Info

Publication number
WO2008025220A1
WO2008025220A1 PCT/CN2007/002391 CN2007002391W WO2008025220A1 WO 2008025220 A1 WO2008025220 A1 WO 2008025220A1 CN 2007002391 W CN2007002391 W CN 2007002391W WO 2008025220 A1 WO2008025220 A1 WO 2008025220A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring
outer ring
bearing protector
double
inner ring
Prior art date
Application number
PCT/CN2007/002391
Other languages
English (en)
Chinese (zh)
Inventor
Jingwei Zhao
Original Assignee
Aig Industrial Group
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN 200620132712 external-priority patent/CN2937623Y/zh
Priority claimed from CN 200620132713 external-priority patent/CN200940638Y/zh
Application filed by Aig Industrial Group filed Critical Aig Industrial Group
Publication of WO2008025220A1 publication Critical patent/WO2008025220A1/fr

Links

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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • 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
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3268—Mounting of sealing rings
    • F16J15/3272—Mounting of sealing rings the rings having a break or opening, e.g. to enable mounting on a shaft otherwise than from a shaft end

Definitions

  • the present invention relates to a double loop split type bearing protector which can have a clasping mechanism and a plug-in type joint.
  • bearing protectors are mostly monolithic and require installation from one end of the shaft. This type of bearing protector has the advantage of good sealing performance, but it is inconvenient to disassemble. That is to say, in the case where other parts are mounted on the shaft, they may hinder the disassembly and assembly of the protector.
  • a split type bearing protector has been proposed in which the ring structure of the protector is broken at a certain point, that is, there is a slit. Through this slit, the protector can be mounted directly to the shaft or removed from the shaft without interference from other parts. However, due to the presence of the slit, the sealability, operability and reliability of the protector may be degraded.
  • the present invention aims to solve these problems in the prior art, that is, to provide a split type bearing protector having a tightening mechanism, which has the advantages of easy disassembly and assembly, and improves sealing, operability and reliability. Sex.
  • the present invention provides a double-ring split bearing protector having a tightening mechanism, comprising an elastic outer ring that is statically mounted in a frame of the device and an elastic inner ring that is held in the outer ring, the inner ring set On the shaft of the device and held relative to the outer ring Still, the inner ring and the outer ring respectively have slits, wherein the bearing protector further comprises at least one of an elastic clasp ring embedded in the outer ring and a shaft spring embedded in the inner ring.
  • the slits of the inner and outer rings are offset from one another in the circumferential direction of the bearing protector.
  • the inner ring has a resilient lip extending obliquely toward the axis of rotation, the resilient lip having a raised portion that urges against the outer circumference of the shaft and that slidably engages the shaft.
  • the outer circumference of the outer ring is fitted with an auxiliary clad split ring.
  • an auxiliary sealing split ring is provided between or outside the outer ring and the inner ring.
  • the inner and outer rings are made of the same or different rubber and plastic materials.
  • the incision of the outer ring is provided with an insert joint, which is inserted in the circumferential direction at one end of the outer ring and bulges to the sides and the insertion and insertion at the other end of the outer ring
  • the portion is matched with a groove-shaped receiving portion.
  • the slit of the inner ring is provided with a flexible compensating block which is softer than the inner ring and has the same cross-sectional shape as the inner ring.
  • the incision of the outer ring is provided with a plug-in joint, which is provided by an insertion portion at one end of the outer ring and a groove-shaped receiving portion at the other end of the outer ring that matches the shape of the insertion portion.
  • the front end and the rear end of the insertion portion have a lateral dimension smaller than a middle portion thereof.
  • the shape of the insertion portion is a circle, an ellipse or a diamond.
  • the slit of the inner ring is straight.
  • FIG. 1 is a front view of a bearing protector of a first embodiment of the present invention.
  • Figure 2 is a cross-sectional view of the bearing protector of Figure 1 taken along line A-A.
  • Figure 3 is a partial enlarged view of the outer ring notch insert of the present invention as seen from the outside of the bearing protector.
  • FIG. 4 is a cross-sectional view showing a bearing protector of a second embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
  • a double-ring split bearing protector in accordance with a first embodiment of the present invention includes an outer ring 10 and an inner ring 20 retained in the outer ring.
  • the outer ring 10 is made of an elastic material such as a rubber material and is statically mounted on the frame of the apparatus in use.
  • the outer circumference of the outer ring 10 is provided with a raised ring 14 to facilitate mounting the outer ring on the frame.
  • the outer ring can be mounted directly on the frame or mounted on the frame with auxiliary components.
  • the outer circumferential side of the outer ring may be provided with an elastic sealing ring.
  • the outer ring 10 holds the inner ring 20 firmly therein.
  • the circumference of the outer ring 10 at the interface of the two is slightly smaller than the circumference of the inner ring 20 at the interface therebetween, thereby causing an interference fit between the outer ring 10 and the inner ring 20.
  • the inner side of the outer ring is provided with a shape suitable for holding the inner ring.
  • the inner side of the outer ring is opened by an inner ring pocket that matches the outer peripheral shape of the inner ring to hold the inner ring compactly in the inner ring pocket.
  • the outer ring can be pressed against the inner ring, thereby ensuring that the inner ring and the outer ring remain stationary relative to the frame.
  • an adhesive can be applied between the inner and outer rings.
  • the outer ring 10 is not a continuous ring but a split ring having a slit 12. That is, at the slit 12, the outer ring 10 is broken.
  • the slit 12 can be a straight slit.
  • the slit 12 has a fitting joint 16 as will be described later.
  • the inner ring 20 that is fitted over the shaft of the device is also made of an elastic material such as a rubber material.
  • the materials used for the inner ring 20 and the outer ring 10 may be the same or different. In addition, the two can have different colors for ease of manufacture and maintenance.
  • the inner side of the inner ring 20 is formed with an elastic lip 26 extending obliquely inwardly, an annular groove 24 is formed between the lip and the inner ring body, and the lip has a projecting portion 28 directed toward the inner side, the corner The portion forms a loop that is in contact with the rotating shaft of the device, and the circumference of the loop is slightly smaller than the outer circumference of the rotating shaft.
  • the inner ring 20 is fitted over the rotating shaft, and the protruding portion 28 is in contact with the outer circumference of the rotating shaft and is slidably engaged, and is slightly extended by the rotating shaft, that is, slightly elastically retracted to the outer side.
  • the lip 26 is tightly surrounded by the corner portion 28 by a certain continuous, uniform elastic thrust against the outer circumference of the rotating shaft without leaving a gap between the inner ring and the rotating shaft.
  • the inner ring 20 is a split ring having a slit 22 at which the inner ring 20 is broken.
  • the slit 22 can be a straight slit.
  • the slit 22 of the inner ring 20 and the slit 12 of the outer ring 10 are offset by a certain angle in the circumferential direction, for example, 5 ° to 180 °, preferably 10 ° to 90 °, whereby the sealing ability can be improved.
  • both the outer ring and the inner ring are split rings with slits, the bearing protectors can be mounted directly on the shaft or removed from the shaft without interference from other parts.
  • the slits of the outer ring and the inner ring are staggered from each other in the circumferential direction of the bearing protector, it is difficult for foreign matter to pass through the two slits at the same time to invade the bearing protector, and therefore, the sealing performance of the bearing protector can be improved.
  • a sleeve can be applied to the outer ring to enclose the outer ring and the inner ring on the rotating shaft. Elastic retaining ring 30.
  • the center of the outer peripheral side of the outer ring 10 is provided with an elastic clasp ring accommodating ring groove 32 (see Fig. 2) for accommodating the elastic clasp ring 30 therein.
  • the length of the elastic clasp ring 30 is less than the circumference of the elastic clasp ring receiving ring groove.
  • the elastic clasp ring 30 can be a continuous uninterrupted ring that can be inserted into the elastic clasp ring receiving ring groove by extending the elastic clasp ring 30.
  • the elastic clasp ring 30 may be detachable, that is, an elongated strip in a normal state, and the detachable elastic clasp ring is more convenient to disassemble.
  • the elastic clasp ring 30 After the elastic clasp ring 30 is placed in the elastic clasp ring accommodating ring groove, the elastic clasp ring is elongated to connect the end and the tail, thereby applying a compressive force to the outer ring to restrain the outer ring and enclose the inner ring. Ring, so that under the action of the outer ring's tightening force and the inner ring's repulsive force, a reliable seal between the inner and outer rings is achieved; in this case, in order to facilitate the stretching of the elastic clasp ring 30 itself, the end-to-end connection can be
  • the first and second ends of the elastic clasp ring 30 are provided with a quick connecting structure, such as a hook structure.
  • the elastic clasp ring 30 can take various forms such as an elastic band, a shaft spring, and the like.
  • the contact portion between the two may be provided with a matching structure, for example, the inner ring is provided with a protrusion protruding outwardly, and the outer ring is provided for accommodating the Protruding grooves, and vice versa.
  • an auxiliary sealing split ring may be provided between the inner ring and the outer ring or both, to assist in sealing.
  • a flexible compensating block (not shown) having a softer cross-sectional shape than the inner ring 20 and having the same cross-sectional shape as the inner ring 20 is added, so that the sealing and assembly effect is further improved. it is good.
  • the elastic clasp ring can also be used as an elastic sealing ring at the same time.
  • the cross-sectional shape (not shown) of the elastic clasp ring may be configured to be adapted to abut against the fitting hole of the frame, thereby improving the bearing protector after the bearing protector is assembled in the frame Static sealing performance between racks
  • An insert joint 16 can be formed at the slit 12 of the outer ring 10. That is, at the slit 12, one end of the outer ring has a projecting insertion portion that protrudes in the circumferential direction and bulges toward both sides; the other end of the outer ring has a groove-shaped accommodating portion that matches the insertion portion.
  • the shape of the insertion portion is gradually increased from the front end, and the lateral dimension is gradually decreased after increasing to a certain extent. Therefore, the front end and the rear end of the insertion portion have a lateral dimension smaller than the intermediate portion, and the groove-shaped receiving portion has a corresponding matching shape.
  • the insertion portion when the insertion portion is inserted into the accommodating portion, the insertion portion first opens the accommodating portion to both sides to enter the accommodating portion. After the insertion portion enters the accommodating portion, the accommodating portion elastically restores the original shape, and the two form a close fit, thereby forming the outer ring into an integral ring. Since the insertion portion is generally inserted into the accommodating portion in the circumferential direction, the insertion portion and the accommodating portion are required to have sufficient elasticity.
  • the insert portion may have a circular shape, an elliptical shape, a rhombic shape, other laterally convex shapes, or a combination of different shapes, etc., as seen in the radial direction of the bearing protector at the insert joint 16.
  • the lip 26 has a certain elastic thrust through its knurled portion 28. Tightly pushed against the outer circumference of the shaft.
  • the elastic thrust may be insufficient, resulting in the inner ring not being able to Hold it securely on the shaft.
  • an important feature of the second embodiment is that a shaft spring 40 for its tightening action is added to increase the elastic thrust of the lip 26 on the rotating shaft and the tightening action of the inner ring against the rotating shaft, and at the same time increase the inner
  • the outer ring has a tight outer force and a sealing effect.
  • the shaft spring 40 is O-shaped in cross section and is fitted in the annular groove 24 of the inner ring 20. Similar to the elastic clasp 30, the shaft spring 40 can be a continuous uninterrupted ring or a breakable ring. In the latter case, in order to facilitate the end-to-end connection of the shaft springs 40 themselves, a quick-connecting structure such as a shackle or a head-inserted structure may be provided at both ends of the shaft spring 40.
  • the elastic clasp ring and the shaft spring for holding are simultaneously provided.
  • the elastic holding ring fitted in the outer ring is not provided. In this case, the tension of the inner ring and the tension of the outer ring can still achieve the tight seal of the entire bearing protector and the rotating shaft.
  • the present invention employs a tightening mechanism to improve the self-encapsulation of the double-ring split bearing protector and the ability to hold the shaft, thereby improving the sealing performance.
  • the holding mechanism may be either or both of an elastic clasp ring embedded in the outer ring and a shaft spring embedded in the inner ring.
  • the present invention adopts an insert type joint at the slit of the outer ring, thereby facilitating the disassembly and assembly of the double-ring split type bearing protector, and improving the sealing property, the operability and the reliability.

Abstract

L'invention concerne un élément de protection de palier à manchon à deux bagues, l'élément de protection comprenant une bague externe élastique (10) montée de façon statique dans le châssis du dispositif et une bague interne élastique (20) retenue dans ladite bague externe (10). La bague interne (20) montée autour de l'arbre du dispositif est immobile par rapport à la bague externe (10). La bague interne (20) et la bague externe (10) ont respectivement une coupure (12, 22). Dans l'invention, l'élément de protection du palier comprend au moins une bague élastique pour enserrer (30) incorporée dans la bague externe (10) et un ressort axial (40) incorporé dans la bague interne (20). De plus, un joint inséré (16) est disposé dans la coupure. Par conséquent, l'élément de protection du palier a l'avantage d'un démontage et d'un montage faciles et possède une bonne caractéristique d'étanchéité.
PCT/CN2007/002391 2006-08-24 2007-08-09 Élément de protection de palier à manchon à deux bagues WO2008025220A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN 200620132712 CN2937623Y (zh) 2006-08-24 2006-08-24 双环剖分式轴承保护器
CN 200620132713 CN200940638Y (zh) 2006-08-24 2006-08-24 具有抱紧机制的双环剖分式轴承保护器
CN200620132712.X 2006-08-24
CN200620132713.4 2006-08-24

Publications (1)

Publication Number Publication Date
WO2008025220A1 true WO2008025220A1 (fr) 2008-03-06

Family

ID=39135496

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2007/002391 WO2008025220A1 (fr) 2006-08-24 2007-08-09 Élément de protection de palier à manchon à deux bagues

Country Status (1)

Country Link
WO (1) WO2008025220A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2604420A (en) * 2021-03-03 2022-09-07 Aigi Env Inc A split oil seal composed of double springs and double rings

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4743034A (en) * 1987-03-27 1988-05-10 Durametallic Corporation Labyrinth bearing protector seal
EP0306979A2 (fr) * 1987-09-10 1989-03-15 Durametallic Corporation Dispositif de joint magnétique
US4890941A (en) * 1989-04-14 1990-01-02 Durametallic Corporation Bearing protector with slinger ring
US5852093A (en) * 1994-11-30 1998-12-22 Nippon Zeon Co., Ltd. Vulcanizable rubber composition, seal used in dynamic state, and sealing material
CN2367831Y (zh) * 1999-04-26 2000-03-08 艾志(南京)机械工业技术有限公司 机械密封轴承保护器
CN2648190Y (zh) * 2003-08-29 2004-10-13 赵晶玮 双环剖分式油封
CN1544821A (zh) * 2003-11-14 2004-11-10 清华大学 电磁轴承保护装置
CN2748711Y (zh) * 2004-11-16 2005-12-28 艾志(南京)机械工业技术有限公司 一种轴承保护密封装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4743034A (en) * 1987-03-27 1988-05-10 Durametallic Corporation Labyrinth bearing protector seal
EP0306979A2 (fr) * 1987-09-10 1989-03-15 Durametallic Corporation Dispositif de joint magnétique
US4890941A (en) * 1989-04-14 1990-01-02 Durametallic Corporation Bearing protector with slinger ring
US5852093A (en) * 1994-11-30 1998-12-22 Nippon Zeon Co., Ltd. Vulcanizable rubber composition, seal used in dynamic state, and sealing material
CN2367831Y (zh) * 1999-04-26 2000-03-08 艾志(南京)机械工业技术有限公司 机械密封轴承保护器
CN2648190Y (zh) * 2003-08-29 2004-10-13 赵晶玮 双环剖分式油封
CN1544821A (zh) * 2003-11-14 2004-11-10 清华大学 电磁轴承保护装置
CN2748711Y (zh) * 2004-11-16 2005-12-28 艾志(南京)机械工业技术有限公司 一种轴承保护密封装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2604420A (en) * 2021-03-03 2022-09-07 Aigi Env Inc A split oil seal composed of double springs and double rings
GB2604420B (en) * 2021-03-03 2023-05-03 Aigi Env Inc A split oil seal composed of double springs and double rings

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