TWM492383U - Box sealed type seal ring with flexibility - Google Patents

Description

Resilient boxed seal

This creation is about a kind of seal, especially a tough boxed ring.

As shown in FIG. 1 , in the prior art, at least one ring 100 is included, and the ring has a triangular pyramid shape at the top of the cross section viewed in the axial direction, and the bottom portion is retracted to have a concave triangular pyramid shape, and is concave. The opening on the outside of the part gradually enlarges, and the thickness of the bottom will gradually decrease. The top of the seal fits into the bottom of the other seal. When the prior art is applied, a pressure will be applied to the top, and the seal has been made downward. At this time, the top of the seal will be raised. On the other side of the inner circumference of the seal ring, the outer sides of the seal ring are expanded outward by external force, but the thickness is different, and leakage is likely to occur. And the sealing rings are stacked and stacked with each other, when the external force is applied, it is not easy to uniformly disperse the pressure in each of the sealing rings, and the pressure of the upper sealing ring will be greater than the pressure of the lower sealing ring, resulting in no force. Both are easy to damage, easy to deform, causing leakage and other problems.

In addition, in 1998, U.S. Patent No. 5,806,858, issued by Garlock, Inc., is a box-sealed seal consisting of five concentric seal rings, wherein the upper and lower seal rings form a complementary pattern, and the middle three seals are formed. The ring is tapered, and the seal of this type can properly withstand the pressure fed from above and push the pressure outward, which has been improved more than the prior art, but in this type of seal, different seals The rings are not symmetric with each other in the radial direction, so the radial stress cannot be balanced, and it is still possible to cause friction between the components for a long time, so that oil leakage and the like are caused to break the shaft seal. Therefore, in order to improve the above disadvantages, it is necessary to propose a sealing device which is less prone to deformation and offset to improve the disadvantages of the above-mentioned prior art.

Therefore, the purpose of the present invention is to solve the above-mentioned problems in the prior art. In the present invention, a toughness-sealed seal ring is proposed, the main purpose of which is that the shaft seal structure forms an effective shaft seal structure around the shaft center. Avoid fluid leakage. The structure of this creation provides that each ring has a margin of outward expansion. When expanding, the outer space between the seal rings provides an axial expansion space; and the V-shaped groove of the seal ring provides a material expansion margin in the radial middle portion of the shaft seal; the space between the inner sides of the seal ring forms the material of the inner portion. Expansion of the surplus. Therefore, the integral sealing ring can be effectively extruded outward to form a strong oil seal structure, and the pressure of the pushdown is appropriately distributed. The nearly symmetrical structure of the second, third and fourth seal rings in the present invention can make the overall extrapolated pressure relatively uniform without causing stress concentration, which contributes to the extension of the overall life.

In order to achieve the above object, a tough seal-type seal ring is proposed in the present invention, comprising a first seal ring, a second seal ring, a third seal ring, a fourth seal ring, and a fifth seal ring. Each of the seal rings is a torus; each ring has a certain thickness along the axial direction; each inner ring surface of the ring forms a cylindrical body having an equal radius in the axial direction, and similarly, each ring The outer annular surface forms another cylindrical body having an equal radius in the axial direction and concentric with the inner annular surface, wherein: the upper surface of the cross section of the first sealing ring in the axial direction is a plane parallel to the radial direction, and the bottom portion is The outer side has a nearly linear retraction, and the cross section of the first seal ring has a trapezoidal shape; the upper surface of the cross section of the second seal ring in the axial direction is a cut surface which is downwardly inclined from the inside, and the bottom portion is a a plane parallel to the radial direction, but an inverted V-shaped groove is formed at a near center thereof; the upper surface of the cross section of the third seal ring is a plane parallel to the radial direction a face, but a V-shaped groove is formed at a near center thereof; a lower surface of the cross section of the third seal ring is a plane parallel to the radial direction, but an inverted V-shaped groove is formed at a near center thereof; a four-ring ring in the form of a shape in which the second seal ring is rotated by 180 degrees in the radial direction; the lower surface of the cross-section of the fifth seal ring in the axial direction is a plane parallel to the radial direction, and the top portion is outwardly and outwardly a nearly linear retraction, such that the fifth sealing ring has a trapezoidal cross section; wherein each inner annular surface of the first to fifth sealing rings is a concentric equal radius annulus; and the first to fifth sealing rings Each of the outer toroids is a torus of equal radius.

The features of the present invention and its advantages can be further understood from the description below, and please refer to the attached drawings when reading.

10‧‧‧ valve body

20‧‧‧ valve stem

30‧‧‧ venting agency

40‧‧‧ side cover

50‧‧‧ valve room

Figure 1 shows a cross-sectional view of a prior art.

Figure 2 shows an exploded view of the creation.

Figure 3 shows a perspective view of the creation.

Figure 4 shows a cross-sectional view of the creation.

Figure 5 shows the application diagram of this creation.

In view of the structural composition of the case, and the functions and advantages that can be produced, in conjunction with the drawings, a preferred embodiment of the present invention is described in detail below.

Please refer to FIG. 2 to FIG. 5, which shows the toughness of the stuffing box ring of the present invention. In the following description, several ring combinations are taken as an example, but the case is not limited to use. The quantity and location of use, other similar sealing structures, are compatible with the structure of the case. Within the scope of this creation, the toughness of this creation includes at least one of the following elements or a combination thereof:

A first seal ring 10 is a torus. The first seal ring 10 has a certain thickness in the axial direction. The inner annular surface forms a cylindrical body having an equal radius in the axial direction. Similarly, the outer annular surface forms another cylindrical body having an equal radius in the axial direction and concentric with the inner annular surface. The upper surface of the cross section of the first sealing ring 10 in the axial direction is a plane parallel to the radial direction, and the bottom portion is contracted from the outer side to the inner side in a nearly straight line, so that the cross section of the first sealing ring 10 has a trapezoidal shape, such as Figure 2 shows.

A second seal ring 20 is a torus. The second seal ring 20 has a certain thickness in the axial direction. The inner annular surface forms a cylindrical body having an equal radius in the axial direction. Similarly, the outer annular surface forms another cylindrical body having an equal radius in the axial direction and concentric with the inner annular surface. The upper surface of the cross section of the second seal ring 20 in the axial direction is a cut surface which is inclined downward from the inside, and the bottom portion is a plane parallel to the radial direction, but an inverted V-shaped groove is formed at the near center thereof, and the shape thereof is as follows. Figure 2 shows. Wherein the slope of the upper surface of the second seal is inclined to be greater than the slope of the lower surface of the first seal, so when the two are stacked together, a gap on the outer side is formed as shown in FIG.

A third seal ring 30 is a torus. The third seal ring 30 has a certain thickness in the axial direction. The inner annular surface forms a cylindrical body having an equal radius in the axial direction. Similarly, the outer annular surface forms another cylindrical body having an equal radius in the axial direction and concentric with the inner annular surface. The upper surface of the cross section of the third seal ring 30 in the axial direction is a plane parallel to the radial direction, but a V-shaped groove is formed at the near center thereof; the lower surface of the cross section of the third seal ring 30 along the axial direction It is a plane parallel to the radial direction, but an inverted V-shaped groove is formed at the near center thereof, and its shape is as shown in FIG.

A fourth seal ring 40 is in the form of a shape in which the second seal ring 20 is rotated 180 degrees in the radial direction.

A fifth seal ring 50 is a torus. The fifth seal ring 50 has a certain thickness in the axial direction. The inner annular surface forms a cylindrical body having an equal radius in the axial direction. Similarly, the outer annular surface forms another cylindrical body having an equal radius in the axial direction and concentric with the inner annular surface. The lower surface of the cross section of the fifth seal ring 50 in the axial direction is a plane parallel to the radial direction, and the top portion is nearly linearly contracted from the outside to the inside, so that the cross section of the fifth seal ring 50 has a trapezoidal shape, such as Figure 2 shows. Preferably, the axial length of the inner annulus of the fifth seal ring 50 is shorter than the axial length of the inner annulus of the first seal ring 10. The axial length of the outer annulus of the fifth seal ring 50 is longer than the axial length of the outer annulus of the first seal ring 10.

Wherein the slope of the upper surface of the fifth sealing ring is greater than the slope of the lower surface of the fourth sealing ring, so when the two are stacked together, a space on the inner side is formed as shown in FIG.

The inner annular faces of the first to fifth seal rings are concentric annular surfaces of equal radius. And each of the outer annular faces of the first to fifth seal rings is a torus of equal radius.

Please refer to FIG. 4 and FIG. 5, which show a preferred embodiment, which is a preferred design of the cross-sectional dimensions of the first to fifth seal rings in the creation. However, this creation is not limited to this particular type. Anyone who meets the definitions of the first to fifth rings above is within the scope of this creation.

In the present invention, the first to fifth seal rings are sequentially stacked in a concentric manner, so that the inner annular faces of the concentric equi-radius of the first to fifth seal rings form a substantially flat inner side of the shaft seal. . And the outer annular faces of the concentric and equal radii of the first to fifth seal rings form a substantially flat outer side of the shaft seal. Therefore, an effective shaft seal structure is formed.

In practical application, as shown in FIG. 5, a shaft center passes through the inner space of the first component and the second component to form an enlarged inner space at the second component, that is, a box-sealed type, and the shaft seal structure is surrounded by An effective shaft seal structure is formed around the shaft to prevent fluid leakage. In actual use, the upper first component will apply a pressure that has caused the first seal to be downward, and the pressure is sequentially followed by the first, second, third, fourth, and fifth seal rings. Passing down, and the structure of this creation provides the margin for each expansion to expand outward. In the case of expansion, the outer gap between the first and second seal rings provides the axial expansion of the five seal rings; and the V-shaped groove between the second, third and fourth seal rings provides the shaft seal The material in the radial middle portion is expanded; and the space between the inner sides of the fourth and fifth seals forms an expansion margin of the material of the inner portion. Therefore, the integral sealing ring can be effectively extruded outward to form a strong oil seal structure, and the pressure of the pushdown is appropriately distributed. The nearly symmetrical structure of the second, third and fourth seal rings in the present invention can make the overall extrapolated pressure relatively uniform without causing stress concentration, which contributes to the extension of the overall life.

At this time, the groove of the upper sealing ring will be on the two sides of the top of the middle sealing ring, and the two sides of the inner groove are formed in an arc shape to be in contact with the convex arc of the top portion, and the groove of the upper sealing ring is received by the groove of the upper sealing ring. The external force will expand to the outside to withstand the objects it is applied to ensure that no leakage will occur.

In summary, the humanized design of this case is quite in line with actual needs. The specific improvement of the existing defects is obviously a breakthrough improvement advantage compared with the prior art, and it has an improvement in efficacy and is not easy to achieve. The case has not been disclosed or disclosed in domestic and foreign literature and market, and has complied with the provisions of the Patent Law.

The detailed description above is a detailed description of one of the possible embodiments of the present invention, and the embodiment is not intended to limit the scope of the patents, and the equivalent implementations or modifications that are not included in the spirit of the present invention should be included in The patent scope of this case.

10‧‧‧ valve body

20‧‧‧ valve stem

30‧‧‧ venting agency

40‧‧‧ side cover

50‧‧‧ valve room

Claims (4)

A toughened sealed seal ring comprising a first seal ring, a second seal ring, a third seal ring, a fourth seal ring, and a fifth seal ring, wherein each of the seal rings is a circle a ring body; each ring has a certain thickness along the axial direction; each inner ring surface of the ring forms a cylindrical body having an equal radius in the axial direction, and likewise, each outer ring surface of each ring forms an axis along the axis Another cylindrical body having an equal radius and concentric with the inner annulus, wherein: the upper surface of the cross section of the first sealing ring in the axial direction is a plane parallel to the radial direction, and the bottom portion is a nearly linear retraction from the outside to the inside. The cross section of the first seal ring has a trapezoidal shape; the upper surface of the cross section of the second seal ring is a cut surface which is inclined downward from the inside, and the bottom portion is a plane parallel to the radial direction, but the vicinity thereof Forming an inverted V-shaped groove at the center; the upper surface of the cross section of the third sealing ring is a plane parallel to the radial direction, but a V-shaped groove is formed at a near center thereof; the third sealing ring The lower surface of the axial cross section is a plane parallel to the radial direction, but an inverted V-shaped groove is formed at the near center thereof; The seal ring is in the form of a rotation of the second seal ring by 180 degrees in the radial direction; the lower surface of the cross section of the fifth seal ring in the axial direction is a plane parallel to the radial direction, and the top portion is nearly outward from the outside. a linear retraction such that the fifth sealing ring has a trapezoidal cross section; wherein each inner annular surface of the first to fifth sealing rings is a concentric equal radius annulus; and the first to fifth sealing rings Each of the outer annulus is a toroidal equal radius annular surface, and the first to fifth sealing rings are sequentially stacked together, and the second sealing ring is superposed under the first sealing ring, and the second sealing ring is superposed below The third seal ring is folded under the third seal ring, and the fourth seal is folded under the fourth seal ring. ring. The flexible sealing ring seal of claim 1, wherein the slope of the upper surface of the second sealing ring is greater than the slope of the lower surface of the first sealing ring, so when the two are stacked Together, a gap is formed on the outside. The toughness of the sealed seal ring according to claim 2, wherein the slope of the upper surface of the fifth seal is inclined to be greater than the slope of the lower surface of the fourth seal, so when the two are stacked Together, a gap in the inside is formed. The flexible sealing seal ring according to claim 3, wherein an axial length of the inner annular surface of the fifth seal ring is shorter than an axial length of the inner annular surface of the first seal ring; The axial length of the outer annulus of the fifth seal is longer than the axial length of the outer annulus of the first seal.