CN217355550U - Spherical floating oil seal - Google Patents

Abstract

The utility model provides a spherical floating oil seal, which comprises two symmetrically arranged oil seal components; the two oil seal assemblies are coaxially arranged and comprise floating seal seats, floating seal rings, sealing rings and elastic pieces; the inner ring of the floating seal seat is provided with a floating seal cavity, and the floating seal cavity is provided with a first opening facing to the opposite side and a second opening facing to the axis of the floating seal seat; the floating seal ring is arranged in the floating seal cavity, the outer peripheral surface of the floating seal ring forms a spherical surface and is tangent to the side wall of the floating seal seat facing the second opening, and a clamping groove is formed in the outer peripheral surface of the floating seal ring in a concave mode; the sealing ring is clamped and matched with the clamping groove; the two elastic pieces are used for enabling one ends of the two floating seal rings facing the opposite sides to abut against each other. The utility model provides a spherical floating oil seal, floating seal ring, elastic component have shared the original function of sealing washer, have reduced the packing force that the sealing washer received, have prolonged life.

Description

Spherical floating oil seal

Technical Field

The utility model belongs to the technical field of mechanical seal spare, concretely relates to spherical floating oil blanket.

Background

The floating oil seal is a special mechanical sealing structure, belongs to one of mechanical seals, has stronger sealing performance under severe working environments with much dust, silt, water vapor and the like, is a compact mechanical seal, and is mainly used in low-speed heavy-load engineering production occasions. The floating oil seal generally comprises two seal assemblies respectively consisting of a pair of wear-resistant metal rings (generally called floating seal rings) and a pair of O-shaped rubber rings, and the two seal assemblies are respectively assembled in two special seal cavities (generally called floating seal seats) for use.

The prior floating oil seal has the following disadvantages:

(1) the pressing force, the rotation prevention, the sealing and the floating functions are all realized by the O-shaped rubber ring, the functions can be realized only by applying a large pressing force to the O-shaped rubber ring, and the O-shaped ring is easy to age and deform and influences the use performance.

(2) The floating seal ring floats through the O-shaped ring, the floating amplitude is small, and the formed floating oil seal is poor in sealing effect.

(3) The pressing force applied by the O-shaped ring is too large, so that the floating seal ring is easy to abrade and wear; heat is easily generated during friction, and the service life is influenced.

(4) After the floating seal ring is pre-installed, the floating seal ring is aligned through the O-shaped ring, the alignment effect is greatly influenced by the use time and the performance of the O-shaped ring, and the alignment difficulty is high.

(5) The design size of the floating seal cavity is complex, the machining precision has large influence on the installation and the use of the floating seal ring, and the requirement is high.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a spherical floating oil seal aims at reducing the packing force to O type circle, and the function that split O type circle was undertaken realizes floating the automation of sealing the ring and adjusts well, improves floating oil seal precision and reliability.

In order to achieve the above object, the utility model adopts the following technical scheme: there is provided a spherical floating oil seal comprising: two symmetrically disposed oil seal assemblies having opposite sides facing one another, said oil seal assemblies comprising:

the floating seal seat is an annular component, and a floating seal cavity is formed in the inner ring of the floating seal seat and is provided with a first opening facing the opposite side and a second opening facing the axis of the floating seal seat;

the floating seal ring is arranged in the floating seal cavity, the outer peripheral surface of the floating seal ring forms a spherical surface and is tangent to the side wall of the floating seal seat facing the second opening, and a clamping groove is formed in the outer peripheral surface of the floating seal ring in a concave mode;

the sealing ring is in clamping fit with the clamping groove and is abutted against the side wall, opposite to the second opening, in the floating seal cavity; and

the elastic piece is in clamping fit with the floating seal cavity and abuts against one end, back to the opposite side, of the floating seal ring;

the two oil seal assemblies are coaxially arranged, opposite sides of the two floating seal seats are distributed at intervals, and the two elastic pieces are used for enabling one ends of the two floating seal rings, facing the opposite sides, to be mutually abutted.

In a possible implementation manner, a limiting member is further disposed on a side wall of each floating seal cavity opposite to the first opening, and the limiting member is matched with the floating seal ring to limit relative displacement between the floating seal ring and the corresponding floating seal seat in the circumferential direction of the floating seal ring.

In a possible implementation manner, each of the limiting members is provided with a clamping head protruding out of the side wall of the floating seal cavity, and the floating seal ring is correspondingly provided with a clamping groove used for being matched with the clamping head.

In a possible implementation manner, the clamping groove is located in the middle of the spherical surface on the floating seal ring.

In a possible implementation manner, the end face of at least one floating seal ring, which faces away from the elastic piece, is recessed to form a collecting groove.

In a possible implementation, the end face of each floating seal ring facing the opposite side comprises a spacing part located at the inner ring and an abutting part located at the outer ring;

the interval distribution of the interval parts on the two floating seal rings forms oil continuous grooves, and the abutting parts on the two floating seal rings are mutually abutted to form sealing surfaces.

In a possible implementation manner, a heat conducting rod is inserted on each floating seal ring, and one end of the heat conducting rod extends to the side wall of the oil continuous groove.

In a possible implementation manner, a closing-in part is further arranged between the side wall of the floating seal cavity and the side face, close to the opposite side, of the floating seal seat, and is used for limiting the floating seal ring in the axial direction of the floating seal ring.

In a possible implementation manner, a stepped ring groove is formed in the inner ring of the end face of the floating seal ring facing the opposite side, and a dirt blocking ring is clamped in the stepped ring groove.

In a possible implementation manner, two end faces of each floating seal ring are respectively provided with a wear-resistant layer.

The utility model provides a spherical floating oil seal, compared with the prior art, there is following beneficial effect:

(1) the elastic part replaces a sealing ring to enable the two floating seal rings to be attached tightly, after the elastic part is pre-installed on the floating seal seat, the floating seal rings swing along with the elastic deformation of the elastic part, and finally the centering of the axis of the floating seal rings and the axis of the floating seal seat is achieved. The elastic piece makes the floating seal ring automatically centered, and the installation difficulty is reduced.

(2) The peripheral surface of the floating seal ring is a spherical surface, the floating seal ring swings by taking the axis of the floating seal ring as a rotation point, the swing amplitude of the spherical surface is large, the adjusting capability of the abutting surfaces of the two floating seal rings is improved, the adjusting precision is improved, and the installation error is reduced; the floating seal ring is prevented from floating and causing oil leakage unobviously, and the sealing performance of the floating oil seal is improved.

(3) The floating seal ring and the elastic piece are separated, the original pressing force and floating function of the sealing ring are achieved, and the elastic piece is compressed axially to achieve pressing of the abutting surfaces of the two floating seal rings. In the prior art, the pressing force of the seal ring on the floating seal ring is generated by the deformation of the compressed seal ring, and the elastic part replaces the function of the seal ring, so that the axial pressing force of the floating seal ring is reduced, the abrasion and the wear are not easy to happen, the service life of the floating seal ring is prolonged in multiples, and the use effect is improved.

(4) The original functions of the O-shaped ring are shared, so that the axial pressing force and the friction strength are reduced, the O-shaped ring is not easy to age, and the performance of the sealing ring is improved; the fatal defects of the rubber element as a main functional element, such as aging, creep and elasticity loss of a sealing ring, are eliminated, and the service life is prolonged.

(5) The floating oil seal has small pressing force, reduces friction force, further reduces heat generated by friction of the floating seal ring, and improves the use effect and safety.

Drawings

Fig. 1 is a schematic cross-sectional view of a spherical floating oil seal according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a floating seal seat according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 1;

fig. 4 is a schematic structural diagram of a floating seal ring according to an embodiment of the present invention;

fig. 5 is a cross-sectional view of a floating seal ring according to a second embodiment of the present invention;

fig. 6 is a schematic diagram of one of the floating seal rings according to the second embodiment of the present invention.

Description of reference numerals:

1. an oil seal assembly;

10. a floating seal seat; 110. a floating seal cavity; 111. a first opening; 112. a second opening; 120. a closing-in part;

20. a floating seal ring; 210. a clamping groove; 220. a card slot; 230. collecting tank; 240. a spacer section; 241. an oil feeding groove; 250. an abutting portion; 251. a sealing surface; 260. a heat conducting rod; 270. a containing groove; 271. a ring groove;

30. a seal ring;

40. an elastic member;

50. a limiting member; 510. a clamping head;

60. keep off dirty circle.

Detailed Description

In order to make the technical problem, technical solution and beneficial effects to be solved by the present invention more clearly understood, the following description is made in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1 to 6, the spherical floating oil seal of the present invention will now be described. The spherical floating oil seal comprises two oil seal assemblies 1 which are symmetrically arranged, and the oil seal assemblies 1 are provided with opposite sides (not shown) facing to the other oil seal assembly 1. The oil seal assembly 1 comprises a floating seal seat 10, a floating seal ring 20, a seal ring 30 and an elastic member 40. The floating seal seat 10 is an annular member, a floating seal cavity 110 is formed in the inner ring of the floating seal seat 10, and the floating seal cavity 110 is provided with a first opening 111 facing to the opposite side and a second opening 112 facing to the axis of the floating seal seat 10; the floating seal ring 20 is arranged in the floating seal cavity 110, the outer peripheral surface of the floating seal ring 20 forms a spherical surface and is tangent to the side wall of the floating seal seat 10 facing the second opening 112, and the outer peripheral surface of the floating seal ring 20 is sunken to form a clamping groove 210; the sealing ring 30 is in clamping fit with the clamping groove 210 and abuts against the side wall of the floating seal cavity 110 opposite to the second opening 112; the elastic piece 40 is in clamping fit with the floating seal cavity 110 and abuts against one end of the floating seal ring 20, which faces away from the opposite side; the two oil seal assemblies 1 are coaxially arranged, opposite sides of the two floating seal seats 10 are distributed at intervals, and the two elastic members 40 are used for enabling one ends of the two floating seal rings 20 facing the opposite sides to abut against each other.

It should be noted that the sealing ring 30 is an O-ring, three sizes of the sealing ring 30, namely, Φ 5.3, Φ 4, and Φ 2.65 exist, and three diameter specifications can be matched with the floating seal rings 20 with various inner diameter sizes.

It should be understood that the utility model discloses the sphere floating oil seal size that produces differs little with current floating oil seal size appearance, compact structure.

Defining the axial end surfaces of the two floating seal rings 20 which are mutually abutted as friction seal surfaces; one side of the floating seal cavity 110 adjacent to the floating seal cavity 110 in the other oil seal assembly 1 is an oil sealing surface.

It should be noted that the cross section of the floating seal ring 20 is similar to a rectangle, but the outer peripheral surface of the floating seal ring 20 is a spherical surface, the abutting surface of the floating seal ring 20 and the floating seal ring 20 in the other oil seal assembly 1 is an inclined and straight surface, and the straight surface forms a friction sealing surface. The self structural strength of the floating seal ring 20 is high, the floating seal ring cannot be easily deformed under pressure, and the service life and the use effect of the floating seal ring 20 are improved.

Compared with the prior art, the spherical floating oil seal provided by the embodiment has the following beneficial effects:

(1) the elastic part 40 replaces the sealing ring 30 to enable the two floating seal rings 20 to be mutually attached tightly, after the floating seal ring is pre-installed on the floating seal seat 10, the floating seal ring 20 swings along with the elastic deformation of the elastic part 40, and finally the centering of the axis of the floating seal ring 20 and the axis of the floating seal seat 10 is realized; the elastic piece 40 enables the floating seal ring 20 to be automatically centered, and installation difficulty is reduced.

(2) The peripheral surface of the floating seal ring 20 is a spherical surface, the floating seal ring 20 swings by taking the axis of the floating seal ring 20 as a rotation point, the swing amplitude of the spherical surface is large, the adjustment capability of the abutting surfaces of the two floating seal rings 20 is improved, the adjustment precision is improved, and the installation error is reduced; the floating seal ring 20 is prevented from floating and not obviously causing oil leakage, and the sealing performance of the floating oil seal is improved.

(3) The floating seal ring 20 and the elastic part 40 split the original pressing force and floating function of the seal ring 30, and the elastic part 40 realizes the pressing of the abutting surfaces of the two floating seal rings 20. In the prior art, the pressing force on the floating seal ring 20 is generated by the deformation of the seal ring 30 after compression, and the elastic part 40 replaces the function of the seal ring 30, so that the axial pressing force on the floating seal ring 20 is reduced, the abrasion and the wear are not easy to happen, the service life of the floating seal ring 20 is prolonged in multiples, and the use effect is improved.

(4) The original functions of the sealing ring 30 are shared, so that the pressing force and the friction strength are reduced, the sealing ring is not easy to age, and the performance of the sealing ring 30 is improved; the fatal defects of the rubber element as a main functional element, such as aging, creep and elasticity loss of the sealing ring 30, are eliminated, and the service life is prolonged.

(5) The pressing force of the floating oil seal is small, the friction force between the two floating seal rings 20 is reduced, the heat generated by the friction of the floating seal rings 20 is further reduced, and the using effect and the safety are improved.

In specific embodiments, the elastic member 40 is a wave spring or a disc spring. The material of the wave spring per unit volume has large deformation energy, variable rigidity and compact structural size, can adapt to narrow installation space and meets the requirement of being used as an elastic component group; the disk spring can bear great ground load in a small space, the deformation energy of unit volume is large, force is transmitted in a concentric mode in a centralized mode, and the requirement for swinging of the floating seal ring 20 is met.

In some embodiments, referring to fig. 1 to 4, a limiting member 50 is further disposed on a sidewall of each floating seal cavity 110 opposite to the first opening 111, and the limiting member 50 cooperates with the floating seal ring 20 to limit the relative displacement between the floating seal ring 20 and the corresponding floating seal seat 10 in the circumferential direction of the floating seal ring 20. The limiting member 50 limits the rotation of the floating seal ring 20 in the circumferential direction, so as to prevent the circumferential side wall of the floating seal ring 20 from sliding relative to the floating seal seat 10, and prevent the friction seal surface from sliding. The limiting piece 5 plays a role in preventing rotation of the sealing ring 30, so that the compression strength is further reduced, the sealing ring 30 is not easy to wear, and the compression strength of the sealing ring 30 is reduced.

Referring to fig. 1 to 2, each of the position-limiting members 50 has a clamping head 510 protruding from a sidewall of the floating seal cavity 110, and the floating seal ring 20 is correspondingly provided with a clamping groove 220 for matching with the clamping head 510. The card connector 510 protrudes from the sidewall of the floating seal cavity 110 opposite to the first opening 111, and extends into the card slot 220, so as to circumferentially limit the rotation of the floating seal ring 20, and prevent the circumferential sidewall of the floating seal ring 20 from sliding relative to the floating seal holder 1.

In order to further improve the effect of the limiting member 50 on preventing the floating seal ring 20 and the floating seal seat 10 from sliding relatively, a plurality of clamping grooves 220 are provided around the axis of the floating seal ring 20, and a plurality of clamping connectors 510 are provided corresponding to the clamping grooves 220.

It should be noted that the depth of the clamping groove 220 of the floating seal ring 20 and the clamping head 510 have a floating margin of 1-2 mm.

In some embodiments, referring to fig. 1-4, the snap groove 210 is located at the middle of the spherical surface of the floating seal ring 20. The clamping groove 210 can ensure that the sealing ring 30 is sealed at the maximum diameter position of the floating seal ring 20, and the sealing effect of the floating oil seal is improved. The outer peripheral surface of the floating seal ring 20 is engaged with the spherical surface of the floating seal holder 10, and bears the pressing force function of the seal ring 30.

The central portion of the spherical surface of the floating seal ring 20 is the central line of the two axial end surfaces of the floating seal ring 20.

In some embodiments, referring to fig. 5-6, the end surface of at least one floating seal ring 20 facing away from the elastic member 40 is recessed to form a collection groove 230. The oil leaked from the oil sealing surface flows into the collecting tank 230, and is subsequently collected and reused, so that the recovery rate of the oil is improved, and the cost is reduced.

In some embodiments, referring to fig. 1-5, the end faces of each floating seal ring 20 facing opposite sides include a spacer portion 240 at the inner race and an abutment portion 250 at the outer race; the spacing parts 240 on the two floating seal rings 20 are distributed at intervals to form oil continuous grooves 241, and the abutting parts 250 on the two floating seal rings 20 are abutted with each other to form sealing surfaces 251. The oil feeding groove 241 ensures the supply of oil to the sealing surfaces 251, prevents dry grinding between the sealing surfaces 251, enhances the oil sealing effect and prolongs the service life. The oil feeding groove 241 reduces the contact area of the sealing surface 251, reducing the frictional force.

Note that the groove width of the oil continuous groove 241 is gradually increased in a direction approaching the axis of the floating seal ring 20.

In some embodiments, referring to fig. 5, a heat conduction rod 260 is inserted into each floating seal ring 20, and one end of the heat conduction rod 260 extends to the sidewall of the oil continuous groove 241. The heat conducting rod 260 can quickly transfer heat generated during the operation of the floating seal ring 20, so that the heat loss speed generated during the operation of the floating seal ring 20 is increased, and the heat dissipation effect and the floating oil seal performance are improved.

Optionally, the material of heat conduction pole 260 is carbon fiber, and the carbon fiber quality is light, and intensity is high, and the heat conductivity is good, satisfies the demand that further improves the radiating effect on floating seal ring 20. Of course, the material of the heat conducting rod 260 may be other materials, such as high temperature thermal ceramics, as long as the heat transfer efficiency is higher than that of the floating seal ring 20 and the strength is high, which is not listed here.

In some embodiments, referring to fig. 2, a closing-in portion 120 is further provided between the side wall of the floating seal cavity 110 and the side surface of the floating seal seat 10 close to the opposite side, for limiting the floating seal ring 20 in the axial direction of the floating seal ring 20. The closing part 120 can prevent the floating seal ring 20 from falling off the floating seal cavity 110 when the oil seal assembly 1 is in butt joint installation, so that the normal installation of the oil seal assembly 1 is ensured, and the floating seal ring 20 is convenient to automatically align.

In specific implementation, the closing-in portion 120 may be a spherical protrusion formed by protruding the side wall of the floating seal cavity 110, and the spherical protrusion is in fit clamping connection with the spherical wall of the floating seal ring 20; or a convex ring is arranged between the side wall of the floating seal cavity 110 and the side surface of the floating seal seat 10 close to the opposite side, and the convex ring can be clamped with the spherical side wall of the floating seal ring 20 to prevent the floating seal ring 20 from separating from the floating seal cavity 110.

In some embodiments, referring to fig. 1 to 5, a stepped ring groove 270 is formed in an inner circle of an end surface of the floating seal ring 20 facing to the opposite side, and the dirt blocking ring 60 is snap-fitted in the stepped ring groove 270. The dirt blocking ring 60 can seal the oil feeding groove 240, so that oil impurities are prevented from entering the sealing surface 251 from the oil feeding groove 240 to grind and damage the abutting part 250, the sealing surface 251 is prevented from being effectively sealed, and the reliability of the floating oil seal is improved.

In some embodiments, each of the floating seal rings 20 has an anti-wear layer (not shown) on both end surfaces. Specifically, the wear-resistant layer is arranged on the end faces of the opposite sides of the abutting portion 250 and the floating seal ring 20 in the opposite direction, the wear-resistant layer can reduce the wear of the floating seal ring 20 when abutting against the elastic piece 40, the wear degree of the sealing face 251 of the abutting portion 250 is reduced, and the service life of the floating seal ring 20 is prolonged.

It should be noted that the entire floating seal ring 20 may be made of wear-resistant alloy cast iron.

Optionally, the wear-resistant layer is made of hard alloy, so that the friction and wear resistance of the hard alloy are good, and the requirement for manufacturing the wear-resistant layer is met. Of course, the material of the wear-resistant layer may also be other materials, for example, a ceramic material, which has good wear resistance, and the material that satisfies the high friction and wear resistance and reduces the wear degree of the floating seal ring 20 may be any material, which is not listed here one by one.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A spherical floating oil seal, comprising: two symmetrically disposed oil seal assemblies having opposite sides facing the other of said oil seal assemblies, said oil seal assemblies comprising:

the floating seal seat is an annular component, and a floating seal cavity is formed in the inner ring of the floating seal seat and is provided with a first opening facing the opposite side and a second opening facing the axis of the floating seal seat;

the floating seal ring is arranged in the floating seal cavity, the outer peripheral surface of the floating seal ring forms a spherical surface and is tangent to the side wall of the floating seal seat facing the second opening, and a clamping groove is formed in the outer peripheral surface of the floating seal ring in a concave mode;

the sealing ring is in clamping fit with the clamping groove and is abutted against the side wall, opposite to the second opening, in the floating seal cavity; and

the elastic piece is in clamping fit with the floating seal cavity and abuts against one end, back to the opposite side, of the floating seal ring;

the two oil seal assemblies are coaxially arranged, opposite sides of the two floating seal seats are distributed at intervals, and the two elastic pieces are used for enabling one ends of the two floating seal rings, facing the opposite sides, to be mutually abutted.

2. The spherical floating oil seal according to claim 1, wherein a limiting member is further provided on a side wall of each floating seal cavity opposite to the first opening, and the limiting member is engaged with the floating seal ring to limit relative displacement between the floating seal ring and the corresponding floating seal seat in a circumferential direction of the floating seal ring.

3. The spherical floating oil seal as claimed in claim 2, wherein each of the position-limiting members has a clamping head protruding from a sidewall of the floating seal cavity, and the floating seal ring is correspondingly provided with a clamping groove for being matched with the clamping head.

4. The spherical floating oil seal as defined in claim 1, wherein said snap-in groove is located in the middle of the spherical surface of said floating seal ring.

5. A spherical floating oil seal according to claim 1, wherein at least one end face of said floating seal ring facing away from said elastic member is recessed to form a collection groove.

6. A spherical floating oil seal according to claim 1, wherein each of end faces of said floating seal rings facing said opposite sides includes a spacing portion at an inner ring, and an abutting portion at an outer ring;

the interval distribution of the interval parts on the two floating seal rings forms oil continuous grooves, and the abutting parts on the two floating seal rings are mutually abutted to form sealing surfaces.

7. A spherical floating oil seal according to claim 6, wherein each of said floating seal rings has a heat transfer rod inserted therein, one end of said heat transfer rod extending to a side wall of said oil continuous groove.

8. A spherical floating oil seal as defined in claim 1, wherein a closing-in part is further provided between the side wall of the floating seal cavity and the side surface of the floating seal seat close to the opposite sides, and is used for limiting the floating seal ring in the axial direction of the floating seal ring.

9. The spherical floating oil seal as defined in claim 1, wherein each floating seal ring has a ring groove formed in the inner ring of the end surface facing said opposite side, two of said ring grooves are defined by a receiving groove, and a dirt blocking ring is snap-fitted into said receiving groove.

10. A spherical floating oil seal as defined in claim 1, wherein each of said floating seal rings has wear resistant layers on both end surfaces.

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