TWI601894B - Stuffing box seal ring with toughness - 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 is better than conventional techniques. There is a greater improvement in the technique. However, in this type of seal, the different seals are not symmetric with each other in the radial direction, so the radial stress cannot be balanced, and it may still cause friction between the components for a long time, resulting in Oil leakage and other phenomena destroy 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 each ring forms a cylindrical body having an equal radius in the axial direction. Similarly, each outer ring surface of each ring forms another cylindrical body having an axial equi-radius 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 nearly linearly contracted from the outside to the inside, so that the cross section of the first sealing ring is a trapezoid; The upper surface of the cross section of the second seal in the axial direction is a cut surface which is inclined downward from the inside, and the bottom is a plane parallel to the radial direction, but an inverted V-shaped groove is formed at the near center thereof; the third seal ring The upper surface of the cross section along 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 is parallel to the radial direction a plane, but an inverted V-shaped groove is formed at a near center thereof; the fourth seal ring is in the form of a shape in which the second seal ring is rotated by 180 degrees in the radial direction; the fifth seal ring is axially cross-sectioned The lower surface 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 fifth The cross section of the ring has a trapezoidal shape; wherein each inner annular surface of the first to fifth sealing rings is a concentric radius of the torus; and each outer annular surface of the first to fifth sealing rings is a concentric radius of the torus .

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.

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 position of use, other similar sealing structure, and the structure compatible with the present case are within the scope of this creation. The flexible ring of this creation includes at least one of the following elements or a combination thereof: The first 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 sealing ring 30 has a certain axial direction The thickness. 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, an axial center passes through an 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 structure, and the shaft sealing structure surrounds the The shaft core forms an effective shaft seal structure 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 rings forms the inner portion The expansion of the material of the bit. 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 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‧‧‧First ring

20‧‧‧Second ring

30‧‧‧ third ring

40‧‧‧ fourth ring

50‧‧‧ fifth ring

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.

10‧‧‧First ring

20‧‧‧First ring

30‧‧‧ third ring

40‧‧‧ fourth ring

50‧‧‧ fifth ring

Claims (9)

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 stacked along an axial direction, each of the seals The ring has an inner annular surface and an outer annular surface concentrically and substantially parallel to the axial direction, an upper surface connected between the inner annular surface and the top end of each of the outer annular surfaces, and the inner annular surface and the inner annular surface a lower surface between the respective bottom ends of the outer annulus, wherein: the upper surface of the first sealing ring is a substantially planar plane substantially perpendicular to the axial direction, and the lower surface of the first sealing ring is opposite to the upper surface thereof An inclined inclined surface, and a distance of the lower surface from the upper surface is gradually decreased from the outer annular surface toward the inner annular surface; the lower surface of the second sealing ring is substantially perpendicular to the axial plane and formed Having at least one first recess recessed toward the inside of the second seal ring, the upper surface of the second seal ring being an inclined surface inclined with respect to the lower surface thereof, and the distance between the upper surface and the lower surface is determined by the The outer annular surface gradually increases toward the inner annular surface; the upper surface of the third sealing ring and The lower surface is a substantially planar plane substantially perpendicular to the axial direction; the upper surface of the fourth seal ring is substantially a substantially planar plane of the axial direction and is formed with at least one dimension recessed toward the interior of the fourth seal ring a second groove, the lower surface of the four seal ring is an inclined surface inclined with respect to the upper surface thereof, and a distance of the lower surface relative to the upper surface is gradually increased from the outer annular surface toward the inner annular surface; The lower surface of the fifth seal is a substantially planar plane substantially perpendicular to the axial direction, the upper surface of the fifth seal is an inclined surface inclined with respect to the lower surface thereof, and the upper surface is opposite to the lower surface The spacing is gradually reduced from the outer annulus toward the inner annulus. The flexible sealing seal ring according to claim 1, wherein the upper surface of the second sealing ring has an inclination angle with respect to the lower surface thereof, and the lower surface of the first sealing ring is opposite to the upper surface thereof. An angle of inclination of the surface. The flexible sealing seal ring according to claim 1, wherein an inclination angle of the upper surface of the fifth seal ring relative to the lower surface thereof is greater than the lower surface of the fourth seal ring An angle of inclination of the surface. The flexible sealing seal ring of claim 1, wherein the second seal ring and the fourth seal ring have a substantially mirror-symmetrical shape with respect to the third seal ring. The flexible sealing seal ring of claim 1, wherein the upper surface of the third seal is formed with a third recess at a position corresponding to the first recess, and the third seal The lower surface of the ring is formed with a fourth recess at a position corresponding to the second recess. The toughness of the sealed seal ring according to claim 1, wherein each of the seal rings is a torus, and the inner annular faces of each of the seal rings have substantially the same radius, and each of the seal rings The outer annulus has substantially the same radius. 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 stacked along an axial direction, each of the seals The ring has an inner annular surface concentrically and substantially parallel to the axial direction and an outer annular surface, the inner annular surface of each of the sealing rings having substantially the same radius, and the outer annular surface of each sealing ring has substantially the same radius. The second sealing ring and the fourth sealing ring have a substantially mirror-symmetrical outer shape with respect to the third sealing ring, and the first sealing ring and the second sealing ring form an opening at the outer annular surface, the first sealing ring The fourth sealing ring and the fifth sealing ring form an opening at the inner annular surface, and the second sealing ring is formed on a surface adjacent to the third sealing ring to have at least one recessed toward the inside of the second sealing ring a groove, and the fourth sealing ring is formed on a surface adjacent to the third sealing ring with at least one second groove recessed toward the inside of the fourth sealing ring. The flexible sealing ring seal of claim 7, wherein the third sealing ring forms a third concave at a position corresponding to a first groove of a surface adjacent to the second sealing ring. a groove, and the third sealing ring is formed with a fourth groove at a position corresponding to a surface of the second sealing ring adjacent to the second sealing ring. The box-sealing ring with toughness as described in claim 1, 5, 7 or 8, wherein the first, second, third and fourth grooves are respectively a V-shaped groove .