KR20080052485A - High pressure sealing apparatus - Google Patents

Abstract

A high pressure sealing apparatus is provided to have high sealing ability by closely contacting a packing member to a sliding rod or a sliding piston with proper contact force under high pressure. A high pressure sealing apparatus includes a top adapter(1), a bottom adapter(3), a plurality of packing members(5), and a plurality of metal backup rings(6). The top adapter is substantially circular on a plane view and has a packing fitting groove(2) with an inverted V-shaped cross section on a bottom wall. The bottom adapter is substantially circular on a plane view and has a packing support wall(4) with an inverted V-shaped cross section on a top wall(3a). The packing members are interposed between the top and bottom adapters. Each of the packing members is substantially circular on a plane view and has an inverted V-shaped cross section. The metal backup rings are alternately overlapped with the packing members. Each of the metal backup rings is substantially circular on a plane view, has an inverted V-shaped cross section, and has a packing fitting unit(7) on a bottom wall(6b). The packing member is made of hard synthetic resin. Deformation allowable gaps(K) are formed on at least two opposite walls among top and bottom walls(5a,5b) of the packing member, the bottom wall of the top adapter, a top wall(6a) and the bottom wall of the metal backup ring, and the top wall of the bottom adapter. The deformation allowable gaps are closed by compressive force of an axial direction(X).

Description

HIGH PRESSURE SEALING APPARATUS

The present invention claims the priority of Japanese Patent Application No. 2007-175220, the contents of which are incorporated herein by reference.

The present invention relates to a high pressure homogenizer for treating and cleaving a material by dispersing, emulsifying, or crushing the material contained in the suspension under high pressure, such as high pressure, or as another example, sliding It prevents excessive deformation of the packing member to the rod or sliding piston, and in close contact with the rod or the piston with an appropriate contact force, has excellent following performance and excellent sealing performance under high pressure, and also has low deterioration and excellent wear resistance, It relates to a high pressure pump exhibiting high heat resistance.

Conventionally, there has been a packing assembly for use in instruments such as, for example, pumps with sliding plungers and plunger bores for receiving the plungers. Such a packing assembly is produced by alternately laminating a supple ring made of nitrile rubber and a rigid ring made of fluorine resin having a V-shaped cross section interposed between the hard upper and lower packing rings (eg, Patent Document 1). ).

In addition, another general packing assembly includes a packing gland nut inserted into the rear end of the plunger bore, a packing gland spacer abutting on the packing gland nut, a lubricating gland abutting on the packing gland spacer, A single stack of packing rings each having a concave shape at the front and a convex shape at the back, a female adapter ring interposed between the lubricating gland and the packing ring and having a concave front face corresponding to the convex back of the packing ring, the female ring A convex backside positioned in front of the first packing ring of the stack and corresponding to the concave front face of the packing ring comprises a male adapter ring (eg, patent document 2).

[Patent Document 1] US Patent No. 5,577,737

[Patent Document 2] US Patent No. 4,572,519

However, the conventional packing assembly described in Patent Document 1 has a structure in which a supple ring made of nitrile rubber and a rigid ring formed of a fluorine resin having a V-shaped cross section interposed between a hard upper and lower packing ring are alternately stacked. The plunger is slidably supported by the plunger bore. Therefore, when the plunger reciprocates under high pressure, the supple ring deforms excessively elastically due to its flexibility, thereby increasing the adhesion to the plunger. However, as the operating speed of the plunger or rod increases, or if the internal pressure of the plunger bore increases, or the plunger is heated, the suppleness and strength of the plunger deteriorate drastically, and the adhesion and sealing performance decrease, resulting in leakage. .

In addition, according to the conventional packing assembly described in Patent Document 1, when the metal plunger moves, the wear resistance of the spool made of nitrile rubber decreases, so that the spool may be markedly worn out and cracked, and the stress limit is exceeded. As a result, the plunger in intimate contact position is damaged. As a result, the mechanical life of the suppling is shortened. Therefore, the suppling must be frequently replaced with another suppling. Considerable labor is required for maintenance inspections.

Therefore, when the sealing performance is increased by increasing the flexibility of the supple ring in order to increase the contact force on the metal plunger, the suppling ring deteriorates wear resistance. In contrast, when the wear resistance of the suppling is increased, the suppleness of the suppling is broken, and the sealing performance on the plunger is reduced. Therefore, conventionally, it has been very difficult to achieve high pressure sealing in which the sealing performance and the wear resistance are balanced. Basically, the conventional packing assembly described in Patent Document 1 is used at a normal pressure of about 8000 Psi to 12000 Psi, and is not used at a high pressure below 100 MPa.

Further, in the conventional packing assembly described in Patent Document 2, a plurality of packing rings that have a substantially V-shaped cross section are separated between a female female adapter ring having a concave front face and a metallic male adapter ring having a convex rear face. It is interposed. Therefore, when the plunger reciprocates under high pressure, the rigidity of the male male adapter ring and the female adapter ring and the lubrication performance of the lubrication gland are performed. However, similar to Patent Document 1, the wear resistance of the packing ring to the plunger is not significantly improved. In addition, the packing ring is degraded in flexibility and ductility, and cracks as it deteriorates. In addition, the contact point with the plunger of the packing ring may be damaged by exceeding the stress limit.

In the general packaging assembly described in Patent Document 2, when the driving speed of the plunger increases, the internal pressure of the plunger increases, or the temperature of the plunger decreases, the wear resistance, ductility, elastic strain, and strength of the packing ring also occur. Therefore, the sealing performance of the packing assembly is not sufficient, leakage occurs and the mechanical life is shortened. The packing ring must be replaced frequently with another packing ring. Considerable labor is required for maintenance inspections.

Further, in the conventional packaging assembly described in Patent Document 2, the plurality of separated packing rings having a substantially V-shaped cross section, as described above, are made of a metal female adapter ring having a concave front face and a metal having a convex shape on the back side. Interposed between male adapter rings. Further, a packing gland screwed into one end of the plunger, a packing gland spacer fitted to the packing gland, and a lubrication ring in contact with the packing gland spacer are provided in the plunger bore. As a result, the number of parts increases, and the structure of the packing assembly becomes complicated. As a result, the production assembly of the packing assembly is not easy, and a considerable workmanship is required.

Accordingly, it is an object of the present invention to provide a superior following performance by preventing excessive deformation of the packing member relative to the sliding rod or sliding piston, and an excellent sealing performance by intimate contact with the sliding rod or sliding piston with an appropriate contact force under high pressure. High pressure sealing device with a simple structure, excellent wear resistance due to deterioration, high strength with a long mechanical life time to facilitate maintenance inspection, high heat resistance, and a small number of parts for easy production and assembly. To provide.

In order to achieve the above object, the upper adapter is substantially circular in plan view and has a packing receiving groove with an inverted V-shaped cross section in its lower wall, substantially circular in plan view, and inverse V in its upper wall. A lower adapter having a packing support wall having a shaped cross section, a plurality of packing members interposed between the upper adapter and the lower adapter, each being substantially circular in plan view, having a reverse V-shaped cross section, and the packing member; Each of which is alternately superimposed, each in a substantially planar view in plan view, has a reverse V-shaped cross section, and has a plurality of metal backing rings having a packing receptacle on its bottom wall, the packing member being made of a hard synthetic resin , Deformation allowance gap K is the upper wall and the lower wall of the packing member, the lower wall of the upper adapter, the upper wall and the lower wall of the backup ring, the upper portion of the lower adapter The at least one is formed on the two opposing wall-axis high-pressure sealing device is closed due to the pressure adhesion in the direction (X) is prepared.

Preferably, when the pressing force is released, a deformation allowance gap is created, and a contact portion formed near a bisecting center in the thickness direction of the packing member, and a non-contact portion in which a non-contact region extends as it extends from the contact portion. When installing the sealing device, the deformation allowance gap is deformed and closed by the tightening force of the fastening bolts for assembling the upper adapter, the packing member, the backup ring, the lower adapter, and the pressing force of the plunger or rod inserted into the packing member.

Preferably, the inclination angle at the upper wall of the packing member is smaller than the inclination angle of the packing receiving groove formed on the lower wall of the upper adapter and the inclination angle of the packing receiving portion formed on the lower wall of the backup ring. The inclination angle at the bottom wall of the packing member is greater than the inclination angle at the top wall of the backup ring and the inclination angle at the top wall of the lower adapter.

Preferably, as the walls extend from the contact portion disposed near the bisectoral center, the deformation allowance gap formed in both the upper wall and the lower wall of the packing member becomes wider.

Preferably, the inclination angle at the top wall of the packing member is substantially equal to the inclination angle of the packing receiving groove formed at the bottom wall of the upper adapter and the inclination angle of the packing receiving portion formed at the bottom wall of the backup ring. Further, the inclination angle at the bottom wall of the packing member is greater than the inclination angle at the top wall of the backup ring and the inclination angle at the top wall of the lower adapter. Also, as the walls extend from the contact near the bisectoral center, the deformation allowance gap formed in the lower wall of the packing member becomes wider.

Preferably, the inclination angle at the upper wall of the packing member is smaller than the inclination angle of the packing receiving groove formed at the lower wall of the upper adapter and the inclination angle of the packing receiving portion formed at the lower wall of the backup ring. Further, the inclination angle at the bottom wall of the packing member is substantially the same as the inclination angle at the top wall of the backup ring and the inclination angle at the top wall of the lower adapter. Also, as the walls extend from the contact near the bisectoral center, the deformation allowance gap formed in the upper wall of the packing member becomes wider.

Preferably, on at least an inner sidewall of the packing member in which the plunger or rod is in close contact, a lip having an inclined portion with a gradual decrease in cross-sectional area from the high pressure side to the low pressure side is formed.

Preferably, the inner wall and outer wall of the packing member are formed in a tapered shape with respect to the bisecting center.

Preferably, the packing member is made of any one of polyamide resin, polyether ether ketone resin, polyethylene resin, polystyrene resin or polyvinyl chloride resin.

Preferably, the packing member withstands high pressures in excess of 100 MPa.

Preferably, any one of the top adapter, backup ring or bottom adapter is made of any one of phosphor bronze, stainless steel, aluminum bronze, nickel silver or beryllium copper alloy.

Preferably, the contact portions formed on the lower wall of the upper adapter, the upper wall of the backup ring, and the upper wall of the lower adapter are each formed of a center bisector centered arc centered on a bisecting center having a predetermined radius.

Preferably, the non-contact portion formed in the lower wall of the upper adapter, the upper wall of the backup ring, and the upper wall of the lower adapter is formed to have a substantially triangular cross-section which is linearly symmetrical with respect to the bisector center.

Preferably, the angle of inclination of the packing member, the backing ring, and the top walls of the lower adapter with respect to the bisector center is 57.5 °. Further, the inclination angle of the packing receiving groove formed in the lower wall of the upper adapter and the inclination angle of the packing receiving portion formed in the lower wall of the backup ring are 60 degrees with respect to the bisected center.

Preferably, the inclination angles of the upper wall and the lower wall of the packing member and the inclination angle of the packing receiving groove formed in the lower wall of the upper adapter are 60 degrees with respect to the bisected center. In addition, the inclination angles of the upper wall of the backup ring and the lower adapter with respect to the bisector center are 57.5 degrees, respectively.

According to the present invention, due to the excellent following performance by preventing excessive deformation of the packing member against the sliding rod or the sliding piston, the excellent sealing performance by close contact with the sliding rod or the sliding piston with a suitable contact force under high pressure, due to the small deterioration To provide a high pressure sealing device having a high structure with excellent wear resistance, long mechanical life time to facilitate maintenance inspection, high heat resistance, and a simple structure composed of a small number of parts for easy production and assembly. Can be.

These and other objects, features and advantages of the present invention will become more apparent by reading the accompanying drawings in conjunction with the following detailed description.

First embodiment

A first embodiment of the high pressure sealing apparatus according to the present invention will be described with reference to FIGS. 1 to 5.

As shown in Figs. 1 to 5, the sealing device according to the first embodiment is an upper adapter having a packing receiving groove 2 on its lower wall which is substantially circular in plan view and has an inverted V-shaped cross section. (1), a lower adapter (3) having a packing support wall (4) on its upper wall that is substantially circular in plan view and has an inverted V-shaped cross section, and the upper adapter (1) and the lower adapter ( 3) a plurality of packing members 5 interposed therebetween, each being substantially circular in plan view, having an inverted V-shaped cross section, and alternately overlapping with the packing member 5, and each being substantially in plan view. And a plurality of metallic back-up rings (6) having a reverse V-shaped cross section and having a packing receiving portion (7) on the bottom wall, the packing member is made of hard synthetic resin, K) is the upper wall 5a and the lower wall 5b of the packing member 5, the upper adapter Formed on at least two opposing walls of the lower wall of (1), the upper wall 6a and the lower wall 6b of the backup ring 6, and the upper wall 3a of the lower adapter 3; The packing member 5 is deformed compressively due to the pressing force to the.

The packing member 5 is made of one of polyamide resin, polyether ether ketone resin, polyethylene resin, polystyrene resin or polyvinyl chloride resin. Preferably, the packing member 5 is made of polyamide resin or polyether ether ketone resin, and is formed hard to withstand high pressure. The reason why the packing member 5 is formed hard is to provide excellent following performance for the plunger or the rod R involving deformation under high pressure. Since the packing member 5 is in close contact with the rod with an appropriate butting force, the packing member 5 has excellent sealing performance, thereby reliably preventing leakage. In addition, the packing member 5 is made of a relatively hard synthetic resin, and the packing member 5 has excellent wear resistance due to less deterioration and generates less wear by-products, thereby exhibiting high strength and high heat resistance.

2, when the pressing force is released, the deformation allowance gap K extends from the contact portion 8 and the contact portion 8 formed near the bisecting center M of the thickness t of the packing member 5. It consists of a non-contact part 9 in which the non-contact area extends accordingly. When installing the sealing device, the deformation allowance gap K is narrowed by assembling the upper adapter 1, the packing member 5, the backup ring 6, and the lower adapter 3 by tightening the tightening bolt 10. FIG. After the overall shape of the packing member 5 is trimmed, a plunger or a rod R is inserted into the packing member 5 to deform the packing member 5 due to the axial direction X pressing force.

Since the contact portion 8 is formed on the arc 8A whose radius center is the bisecting center M, the packing member 5 is interposed between the lower wall of the upper adapter 1 and the upper wall of the backup ring 6. do. Thus, the sealing device has excellent sealing performance even under high pressure.

Specifically, according to the first embodiment, in the deformation allowance gap K, the inclination angle θ1 at the upper wall of the packing member 5 is the packing receiving groove 2 formed on the lower wall of the upper adapter 1. Is smaller than the inclination angle θ2 and the inclination angle θ2 of the packing accommodating portion 7 formed in the lower wall 6b of the backup ring 6. Incidentally, the inclination angle θ3 of the lower wall 5b of the packing member 5 is the inclination angle θ4 at the upper wall 6a of the backup ring 6 and the inclination angle θ4 at the upper wall of the lower adapter 3. Greater than)

More specifically, according to the first embodiment, as shown in FIGS. 1 and 2, the inclination angle θ1 and the inclination angle θ4 are 115 °, respectively. Inclination angle (theta) 2 and inclination angle (theta) 3 are 120 degrees, respectively. However, these inclination angles are not limited to the angles according to the present invention.

Moreover, the non-contact part 9 has a substantially triangular cross section, and makes line symmetry with respect to the bisector center M. As shown in FIG. Therefore, when installing the packing member 5, by tightening the fastening bolt 10, the deformation | transformation tolerance gap K is narrowed. Next, after arranging the packing member 5, the plunger or the rod R is inserted into the packing member 5. Therefore, the pressing force in the axial direction X deforms the packing member 5 to close the non-contact portion 9. Therefore, excessive deformation of the plunger or rod R beyond the stress limit or elastic limit is prevented, and the left and right balance of the deformation of the packing member 5 is achieved. Thus, since the packing member 5 is subjected to dispersed high pressure, the packing member 5 is in intimate contact with the plunger or the rod R with an appropriate contact force, and has excellent sealing performance. In addition, at the inner circumference of the packing member 5, wear of the packing member 5 to the plunger or rod R is reduced, so that the wear resistance of the packing member 5 increases, and the packing member 5 due to wear The heat is controlled and the life of the packing member 5 is increased.

The packing member 5 according to the first embodiment of the present invention can withstand a pressure of less than 100 MPa, has excellent sealing performance and can withstand pressures greater than 100 MPa. Preferably, the packing member 5 withstands a pressure of more than 280 MPa and has excellent sealing performance to reliably prevent leakage.

On at least an inner sidewall of the packing member in which the plunger or rod R is in close contact, a lip 11 having an inclined portion 11a in which the cross-sectional area gradually decreases from the high pressure side to the low pressure side is formed. Due to the lip portion 11, excessive deformation of the packing member 14 is prevented, and it has an excellent following performance with respect to the plunger or the rod R reciprocating in the axial direction X, and has an excellent sealing performance to provide an appropriate contact force. In close contact with the plunger or rod (R). In addition, wear to the plunger or rod R is reduced, thereby improving wear resistance.

Specifically, the inclined portion 11a has an inclination angle α with respect to the bisecting center M. As shown in FIG. In the first embodiment, the inclination angle α is 5 °. According to the hardness level, thickness, height, etc. of the packing member 5, the inclination angle (alpha) of the inclination part 11a changes. Accordingly, the sealing performance and wear resistance of the packing member 5 with respect to the plunger or rod R can be appropriately changed and adjusted.

In addition, any one of the upper adapter 1, the backup ring 6, or the lower adapter 3 may be phosphor bronze (two or three), stainless steel (SUS329J4L), aluminum bronze (two or three), It is made of any one of nickel silver (2 kinds or 3 kinds) or beryllium copper alloy. Thus, the mechanical life time of the upper adapter 1, the backup ring 6, or the lower adapter 3 increases, and its heat resistance, rust preventing ability and chemical resistance increase.

In order to install the sealing device in the packing receiving groove 12 of the target device B, such as a high pressure homogenizer or a high pressure pump for processing and dividing the material, first, the upper adapter 1 and the lower adapter 3 Are arranged. Subsequently, the packing member 5 and the backup ring 6 alternately overlap each other between the upper adapter 1 and the lower adapter 3. Subsequently, the cover F is covered, the plurality of tightening bolts 10 are tightened to narrow the deformation allowance gap K, and the entire contour of the packing member 5 is trimmed. At this time, the number of the packing member 5 and the backup ring 6 is selected according to the normal internal pressure of the target device B.

As shown in FIGS. 1 and 2, when the pressing force is released before the tightening bolt 10 is tightened, the upper wall 5a and the lower wall 5b of the packing members 5 toward the high pressure side P. FIG. , Between at least two opposing walls of the lower wall of the upper adapter 1, the upper wall 6a and the lower wall 6b of the backup ring 6, and the upper wall of the lower adapter 3, the deformation allowance gap K ) Is formed.

The plunger or rod R is then inserted from the top of the cover F into the packing assembly accommodated in the packing receiving groove 12. Then, in addition to the tightening force of the tightening bolt 10, the pressing force deforms the packing member 5 in the axial direction due to the insertion of the plunger or the rod R into the axial direction X. Thus, as shown in FIG. 5, each deformation allowance gap K is closed. At this time, the volume of the packing member 5 decreases as the deformation allowance gap K is closed. Thus, the packing member 5 is smooth, fast and easily induced to deform in the axial direction, in the radial direction perpendicular to the axial direction, and in the circumferential direction, but excessive deformation is prevented. Accordingly, the packing member 5 has excellent sealing performance and is in close contact with the plunger or the rod R with an appropriate contact force, thereby preventing leakage. In addition, since the tracking performance of the packing member 5 against the plunger or the rod R reciprocating in the axial direction X increases, the stress limit and the elastic limit, even under high pressure, when the target device B is operated. Excessive deformation beyond is avoided (see FIGS. 2 and 4). The plunger or rod R thus moves reciprocally and liquid tightly in the axial direction X inside the upper adapter 1, the packing member 5, the backup ring 6, and the lower adapter 3. do.

At this time, the inclination angle θ1 on the upper wall of the packing member 5 is formed on the inclination angle θ2 of the packing receiving groove 2 formed on the lower wall of the upper adapter 1 and on the lower wall of the backup ring 6. It is smaller than the inclination angle θ2 of the packing accommodation portion 7. Further, the inclination angle θ3 at the bottom wall of the packing member 5 is greater than the inclination angle θ4 at the top wall of the backup ring 6 and the inclination angle θ4 at the top wall of the lower adapter 3. Also, as the wall extends from the contact 8 near the bisecting center M, the deformation allowance gap K formed in the upper wall 5a and the lower wall 5b of the packing member 5 becomes wider. Therefore, when the deformation allowance gap K is closed by the pressing force of the tightening bolt 10 in the axial direction X, the packing member 5 is the lower wall of the upper adapter 1, the upper part of the backup ring 6. It is in intimate contact with the wall and the bottom wall and the top wall of the bottom adapter 3. Since the packing member 5 is in intimate contact with the already reduced volume due to the deformation allowance gap K provided, excessive deformation beyond the stress limit and the elastic limit is prevented.

At this time, the non-contact portion 9 of the packing member 5 formed on both the near end side and the distal end side of the plunger or rod R is formed in a substantially triangular cross section, and when the pressing force of the tightening bolt 10 is released, Asymmetry about the center (M). Thus, as the non-contacting portion 9 is provided, excessive deformation of the packing member 5 with respect to the plunger or rod R is prevented. In addition, pressure deformation is induced evenly in both the left and right directions with respect to the bisecting center M. FIG. Since most of the packing member 5 is subjected to a high pressure distributed in the axial direction X, the packing member 5 is in intimate contact with the plunger or the rod R with an appropriate contact force.

Furthermore, for the lower adapter 3, the backup ring 6, and the upper adapter 1, the packing member is provided because the deformation allowance gap K has a substantially triangular cross section and is linearly symmetrical with respect to the bisecting center M. FIG. The assembly of (5) is made with high precision without deflection.

In addition, the packing member 5 is made of any one of a relatively hard synthetic resin, i.e., polyamide resin, polyether ether ketone resin, polyethylene resin, polystyrene resin or polyvinyl chloride resin. Further, the lip 11 of the inclined portion 11a having an inclination angle α of about 5 ° with respect to the bisecting center M is at least plunger so that the cross-sectional area of the packing member 5 decreases from the high pressure side to the low pressure side. On the rod R side, formed on the side wall of the packing member 5, the volume of the packing member 5 is reduced. Accordingly, the packing member 5 is deformed, but excessive deformation beyond the stress limit and the elastic limit is prevented, and the following performance of the packing member 5 with respect to the reciprocating plunger or the rod R becomes excellent. . Since the packing member 5 comes into close contact with an appropriate contact force, excellent sealing performance is obtained, and leakage is reliably prevented. In addition, wear of the packing member 5 to the plunger or rod R is reduced, and wear resistance of the packing member 5 is increased. Thus, the packing member 5 has excellent wear resistance due to less deterioration and generates less wear by-products. In addition, since the packing member 5 is alternately protected by a backup ring 6 made of any one of phosphor bronze, stainless steel, aluminum bronze, nickel silver or beryllium copper alloy, the packing member ( 5) maintains high strength, increasing its mechanical life time. Thus, the man-hour for replacing the packing member 5 with new ones or the man-hour for removing wear by-products is reduced, so that maintenance inspection becomes easy, and the packing member 5 has excellent heat resistance and is made up of a small number of parts, Its simple structure makes it easy to manufacture and assemble.

In addition, the upper adapter 1, the lower adapter 3, and the backup ring 6 are made of any one of phosphor bronze, stainless steel, aluminum bronze, nickel silver or beryllium copper alloy, and a plunger or rod made of hard metal Excellent due to the low wear resistance of the upper adapter 1, the lower adapter 3, and the backup ring 6 to (R), the sealing device gives high strength, has a long mechanical life time, and excellent It has heat resistance, excellent antirust property and excellent chemical resistance.

Therefore, in the packing member 5 according to the first embodiment, even under a pressure of less than 100 MPa and under a pressure of more than 100 MPa, even under a pressure of more than 280 MPa, of course, a stress limit and an elastic limit Excessive deformation beyond is avoided. The packing member 5 has a good following performance with respect to the plunger or the rod R and is in intimate contact with the plunger or the rod R with an appropriate contact force. Thus, the packing member 5 has excellent sealing performance and reliably prevents leakage. In addition, the packing member 5 is excellent in wear resistance and exhibits high strength due to a small deterioration. Accordingly, the mechanical life time of the packing member 5 is hundreds of hours or more even under continuous operation, and the heat resistance of the packing member 5 is 120 ° C or more. Therefore, a high pressure sealing member is obtained that can be driven for a long time with both excellent sealing performance and excellent wear resistance under high pressure. Thus, the packing member 5 may be, for example, a high pressure homogenizer, or another example of a high pressure pump, which processes and splits the material by dispering, emulsifying, or crushing the material contained in the suspension under high pressure. It is used in the sealing device for the sliding rod, piston, or plunger of the target object device (B). Applications of the packing member 5 are very diverse.

2nd Embodiment

A second embodiment of the high pressure sealing apparatus according to the present invention will be described with reference to FIGS. 6 to 9.

In the second embodiment, the deformation allowance gap K is formed in the lower wall 5b of the packing member 5. In the first embodiment, when the pressing force is released, the deformation allowance gap K is formed in both the upper wall 5a and the lower wall 5b of the packing member 5. In the second embodiment, the inclination angle [theta] 1 formed on the upper wall 5a of the packing member 5 is the inclination angle [theta] '2 of the packing receiving groove 2 formed on the lower wall of the upper adapter 1, and the backup. It is substantially the same as the inclination angle θ'2 of the packing receiving portion 7 formed in the lower wall 6b of the ring 6. Incidentally, the inclination angle θ3 of the lower wall 5b of the packing member 5 is the inclination angle θ4 of the upper wall 6a of the backup ring 6 and the inclination angle of the upper wall of the lower adapter 3 ( greater than θ4). As the lower wall 5b extends from the contact 8 near the bisecting center M, the deformation allowance gap K formed in the lower wall 5b of the packing member becomes wider.

Specifically, the inclination angle θ1, the inclination angle θ3, and the inclination angle θ'2 are 120 °, and the inclination angle θ4 is 115 °. However, these inclination angles are not limited to the angles according to the present invention.

Further, according to the second embodiment, the pressing force in the axial direction X at the time of installation in the target device B is smaller than the pressing force of the first embodiment, the packing member 5 is deformed, and the backup ring 6 And the deformation allowance gap K is in close contact with the lower adapter 3. In addition, since the packing member 5 is supported by the metal back-up ring 6, deformation of the packing member 5, even under high pressure, prevents excessive deformation beyond the stress limit and the elastic limit of the packing member 5 is prevented. This is induced. Thereby, the following performance of the packing member 5 with respect to the plunger or the rod R is excellent, and the packing member 5 is in close contact with the rod R or the like with an appropriate contact force. As a result, the packing member 5 exhibits excellent sealing performance. Thus, the plunger or rod R moves smoothly and surely. In addition, since the backup ring 6 is made of any one of phosphor bronze, stainless steel, aluminum bronze, nickel silver or beryllium copper alloy, the wear resistance of the packing member 5 against the metal plunger or the rod R is increased, Heat generation due to wear is regulated.

Third embodiment

10 to 13 show a third embodiment of a sealing apparatus according to the invention.

The difference from the first embodiment in the third embodiment is that the deformation allowance gap K is formed on the upper wall 5a of the packing member 5. That is, in the third embodiment, the inclination angle [theta] 1 formed on the upper wall 5a of the packing member 5 is the inclination angle [theta] 2 of the packing receiving groove 2 formed on the lower wall of the upper adapter 1, and the backup. It is smaller than the inclination angle θ2 of the packing receiving portion 7 formed in the lower wall 6b of the ring 6. Incidentally, the inclination angle θ3 formed on the lower wall 5b of the packing member 5 is the inclination angle θ4 at the upper wall 6a of the backup ring 6 and the inclination angle of the upper wall of the lower adapter 3. It is substantially the same as (θ4). As the upper wall 5a extends from the contact 8 near the bisecting center M, the deformation allowance gap K formed in the upper wall 5a of the packing member becomes wider.

According to the third embodiment, due to the pressing force in the axial direction X of the tightening bolt 10 smaller than the pressing force of the first embodiment, the deformation allowance gap K is closed and the upper portion of the packing member 5 is closed. The wall 5a is in contact with the packing receiving groove 2 formed in the lower wall of the upper adapter 1 and the lower wall 6b of the backup ring 6. Since the packing member 5 is supported by a backup ring 6 made of any one of phosphor bronze, stainless steel, aluminum bronze, nickel silver or beryllium copper alloy, the packing member 5 is induced to deform, but Under strain, excessive deformation beyond the stress limit and elastic limit is prevented, and the following performance of the packing member 5 against the reciprocating plunger or the rod R is excellent. Since the packing member 5 comes into close contact with an appropriate contact force, excellent sealing performance is obtained. Thus, the plunger or rod R moves smoothly and surely. In addition, since the backup ring 6 is made of any one of phosphor bronze, stainless steel, aluminum bronze, nickel silver or beryllium copper alloy, the wear resistance of the packing member 5 against the metal plunger or rod R is increased, Heat generation due to wear is regulated.

Although the present invention has been described at least in an illustrative manner with reference to the accompanying drawings, it is obvious that various changes and modifications will be apparent to those skilled in the art. Accordingly, such variations and modifications will be considered to be included in the present invention without departing from the scope of the invention as defined below.

1 is a cross-sectional view showing a first embodiment of the high pressure sealing apparatus according to the present invention when the pressing force is released.

2 is an enlarged cross-sectional view showing a part of the high pressure sealing apparatus.

3 is a cross-sectional view showing a high pressure sealing device when a pressing force is applied to the high pressure sealing device.

4 is an enlarged cross-sectional view showing a part of the high pressure sealing apparatus.

Fig. 5 is a sectional view showing the high pressure sealing device installed inside the target device.

Fig. 6 is a sectional view showing a second embodiment of the present invention when the pressing force is released.

7 is an enlarged cross-sectional view showing a part of the high pressure sealing apparatus.

8 is a cross-sectional view showing a high pressure sealing device when a pressing force is applied to the high pressure sealing device.

9 is an enlarged cross-sectional view showing a part of the high pressure sealing apparatus.

Fig. 10 is a sectional view showing a third embodiment of the high pressure sealing apparatus according to the present invention when the pressing force is released.

11 is an enlarged cross-sectional view showing a part of the high pressure sealing device.

12 is a cross-sectional view showing a high pressure sealing device when a pressing force is applied to the high pressure sealing device.

13 is an enlarged cross-sectional view showing a part of the high pressure sealing device.

<Explanation of symbols for the main parts of the drawings>

1: upper adapter 3: lower adapter

4 packing support wall 5 packing member

6: backup ring K: deformation allowance gap

5a: upper wall of the packing member 5b: lower wall of the packing member

6a: upper wall of the backup ring 6b: lower wall of the backup ring

M: Bisector center (M) 8: Contact part

9 non-contact portion 10 tightening bolt

Claims (15)

An upper adapter substantially circular in plan view, the upper adapter having a packing receiving groove having an inverted V-shaped cross section at its bottom wall; A bottom adapter that is substantially circular in plan view and has a packing support wall having an inverted V-shaped cross section at its top wall; A plurality of packing members interposed between the upper adapter and the lower adapter, each being substantially circular in plan view, having a reverse V-shaped cross section, and And a plurality of metal back-up rings superimposed alternately with said packing member, each being substantially circular in plan view, having an inverted V-shaped cross section and having a packing receptacle on the bottom wall thereof, The packing member is made of hard synthetic resin, The deformation allowance gap K is formed on at least two opposing walls of an upper wall and a lower wall of the packing member, a lower wall of the upper adapter, an upper wall and a lower wall of the backup ring, and an upper wall of the lower adapter to form an axial direction. High pressure sealing device closed due to the pressing force to (X). 2. The method according to claim 1, wherein when the pressing force is released, the deformation allowance gap is formed, and the contact portion is formed near the bisecting center in the thickness direction of the packing member, and the non-contact portion extends from the contact portion and extends from the contact portion. , When installing the sealing device, the deformation is caused by the tightening force of the fastening bolts for assembling the upper adapter, the packing member, the backup ring and the lower adapter, and by the pressing force of the plunger or the rod inserted into the packing member. High pressure sealing device in which the allowable gap is deformed and closed. The inclination angle at the upper wall of the packing member is smaller than the inclination angle of the packing receiving groove formed on the lower wall of the upper adapter, and the inclination angle of the packing receiving portion formed on the lower wall of the backup ring. , And the inclination angle at the bottom wall of the packing member is greater than the inclination angle at the top wall of the backup ring and the inclination angle at the top wall of the lower adapter. The inclination angle at the top wall of the packing member is smaller than the inclination angle of the packing accommodation groove formed on the bottom wall of the upper adapter, and the inclination angle of the packing accommodation portion formed on the bottom wall of the backup ring. The inclination angle at the bottom wall of the packing member is greater than the inclination angle at the top wall of the backup ring, and the inclination angle at the top wall of the bottom adapter, And as the walls extend from the contact portion disposed near the bisecting center, a deformation allowance gap formed in both the upper wall and the lower wall of the packing member becomes wider. The inclination angle at the top wall of the packing member is substantially equal to the inclination angle of the packing receiving groove formed on the bottom wall of the upper adapter and the inclination angle of the packing receiving portion formed on the bottom wall of the backup ring. Same as The inclination angle at the bottom wall of the packing member is greater than the inclination angle at the top wall of the backup ring, and the inclination angle at the top wall of the lower adapter, And as the walls extend from the contact near the bisecting center, the deformation allowance gap formed in the bottom wall of the packing member becomes wider. The inclination angle at the upper wall of the packing member is smaller than the inclination angle of the packing receiving groove formed on the lower wall of the upper adapter, and the inclination angle of the packing receiving portion formed on the lower wall of the backup ring. , The inclination angle at the bottom wall of the packing member is substantially equal to the inclination angle at the top wall of the backup ring, and the inclination angle at the top wall of the bottom adapter, And the walls extend from the contact portion near the bisected center, so that the deformation allowance gap formed in the upper wall of the packing member becomes wider. 2. The high pressure sealing apparatus as claimed in claim 1, wherein a lip portion is formed on at least an inner sidewall of the packing member in which the plunger or the rod is in close contact with an inclined portion that gradually decreases in cross-sectional area from the high pressure side to the low pressure side. The high pressure sealing apparatus according to claim 1, wherein the inner and outer walls of the packing member are formed in a tapered shape with respect to the bisecting center. The high pressure sealing apparatus as claimed in claim 1, wherein the packing member is made of any one of polyamide resin, polyether ether ketone resin, polyethylene resin, polystyrene resin or polyvinyl chloride resin. 2. The high pressure sealing apparatus of claim 1, wherein the packing member withstands high pressure in excess of 100 MPa. The high pressure sealing apparatus of claim 1, wherein any one of the upper adapter, the backup ring, or the lower adapter is made of any one of phosphor bronze, stainless steel, aluminum bronze, nickel silver, or beryllium copper alloy. The center bisector of claim 1, wherein the contact portions formed in the lower wall of the upper adapter, the upper wall of the backup ring, and the upper wall of the lower adapter each have a center of a bisector having a predetermined radius. High pressure sealing device is formed by a centered arc). The non-contact portion formed in the lower wall of the upper adapter, the upper wall of the backup ring, and the upper wall of the lower adapter is formed to have a substantially triangular cross-section that is linearly symmetrical with respect to a bisectoral center. High pressure sealing device. The angle of inclination of the packing member, the backup ring, and the upper walls of the lower adapter relative to a bisecting center is 57.5 °, The inclination angle of the packing receiving groove formed in the lower wall of the upper adapter and the inclination angle of the packing receiving portion formed in the lower wall of the backup ring with respect to the bisecting center are each 60 °. The inclination angle of the upper wall and the lower wall of the packing member, and the inclination angle of the packing receiving groove formed in the lower wall of the upper adapter, respectively, with respect to the bisecting center is 60 °, And the inclination angle of the upper wall of the backup ring and the lower adapter relative to the bisecting center is 57.5 ° each.

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