JP5041896B2 - High pressure sealing device - Google Patents

Abstract

There is provided a high pressure sealing apparatus including: a top adapter including a packing receiving recess having an inverted V-shaped section; a bottom adapter including a packing supporting wall having an inverted V-shaped section; packing members each having an inverted V-shaped section, and interposed between the top adapter and the bottom adapter; and backup rings each having an inverted V-shaped section, and alternately overlapped with the packing members. The packing members are made of hard synthetic resin. A deformation allowing gap is formed on at least two facing walls of a top wall or a bottom wall of the packing member, and a bottom wall of the top adapter, a top wall and a bottom wall of the backup ring, or a top wall of the bottom adapter to be closed owing to compaction force in an axial direction X.

Description

The present invention relates to a high-pressure sealing device, for example, a high-pressure homogenizer for processing or subdividing raw materials, such as dispersing, emulsifying, or crushing raw materials contained in a suspension under a high-pressure atmosphere, In a target device that pumps liquid in a high-pressure atmosphere, such as a high- pressure pump , the rod or the piston that slides can be prevented from excessive deformation and the followability is good. It exhibits an excellent sealing property in a high-pressure atmosphere, and has good wear resistance, little deterioration, high strength, and heat resistance.

  Conventionally, for example, as a packing assembly used in a machine such as a pump having a plunger that slides and a plunger hole that accommodates the plunger, a V-shaped cross section is provided between upper and lower rigid filling rings. And a plurality of soft rings formed of nitrile rubber and a hard ring formed of a fluororesin sandwiched between the soft rings (see, for example, Patent Document 1).

Further, as another prior art as a packing assembly, a packing pressing member that is fastened to one end of a plunger hole, a packing pressing spacer that contacts the packing pressing member, a lubrication ring that contacts the packing pressing spacer, and a front surface Concave shape, rear surface has a convex shape, is located between the separated packing ring and the lubricating ring and the packing ring, and the concave front surface corresponding to the convex shape of the rear surface of the packing ring contacts the packing ring A female adapter ring, and a male adapter ring located on the front surface side of the first packing ring and having a convex rear surface corresponding to the concave shape on the front surface side of the packing ring, in contact with the packing ring. There was a packing assembly (see, for example, Patent Document 2).
US Pat. No. 5,577,737 U.S. Pat. No. 4,572,519

  However, the conventional packing assembly described in Patent Document 1 has a V-shaped cross section between upper and lower hard filling rings, and a plurality of soft rings formed of nitrile rubber, and between the soft rings. A structure that supports a plunger formed of a hard material made of metal in a plunger hole so as to be slidable by laminating a hard ring formed of fluororesin and sandwiched between When the jar slides back and forth, the soft ring with respect to the plunger is extremely elastically deformed due to flexibility, while the closeness to the plunger is good, while the operating speed of the plunger or rod increases, When the internal pressure in the plunger hole increases and the temperature rises, the flexibility, elastic deformation, strength, etc. deteriorate rapidly, and the adhesion to the plunger and the sealing performance are impaired. , Resulting in leakage.

  Further, in the above-described conventional packing assembly described in Patent Document 1, the soft ring formed of nitrile rubber due to the sliding movement of the metal plunger lacks wear resistance, and wear becomes excessive. , Cracks occurred, the close part to the plunger was damaged due to the stress limit, and the mechanical life was short. For this reason, the soft ring requires frequent replacement work, and much labor is required for maintenance and inspection.

  As described above, when the softness of the soft ring is increased with respect to the metal plunger to increase the sealing force by increasing the pressure contact force, the wearability is lacking, and conversely, the wear resistance of the soft ring is increased. In addition, since the softness of the soft ring is impaired and the sealing performance against the plunger is lacking, it has been difficult to obtain a high-pressure sealing material in which the sealing performance and the wearability are balanced. . In the first place, the conventional packing assembly described in Patent Document 1 exhibits a sealing property at a normal pressure of about 8000 to 12000 PSI, and the physical properties do not deteriorate under a high pressure of 100 MPa or more. It did not obtain a good sealing property and was not put to practical use.

  The conventional packing assembly described in Patent Document 2 includes a female adapter ring having a concave front surface formed of metal and a male adapter ring having a convex rear surface in the plunger hole. Since a plurality of separated packing rings having a substantially V-shaped cross section are interposed between the male adapter ring and the male adapter ring formed by reciprocating and sliding the plunger under high pressure, The lubricity with respect to the plunger formed of metal is exhibited by the hardness of the female adapter ring and the lubricity by the lubrication ring. Wear resistance has not been improved sufficiently, lacks flexibility and elasticity, causes deterioration and cracks, and the close contact with the plunger exceeds the stress limit. , Also they caused damage.

  Even in the above-described conventional packing assembly described in Patent Document 2, the wear resistance, flexibility, elastic deformation, strength, etc. of the packing ring may be reduced due to an increase in the operating speed of the plunger or in the plunger hole. Found when the internal pressure increases or becomes hot, the sealing of the packing assembly is still insufficient, liquid leakage occurs, the mechanical life is short-lived, frequently requires replacement with a new one, and maintenance -A lot of labor is required for inspection, and sufficient sealing performance is not guaranteed under a high pressure of 100 MPa or more.

  Moreover, the conventional packing assembly described in Patent Document 2 also has a female adapter ring formed of metal and having a concave front surface and a convex rear surface in the plunger hole as described above. A plurality of separated packing rings having a substantially V-shaped cross section are interposed between the male adapter ring, a packing pressing member that is tightened at one end in the plunger hole, and the packing pressing member. Since it includes a packing pressing spacer that contacts and a lubricating ring that contacts the packing pressing spacer, the number of parts increases, the structure becomes complicated, and manufacturing and assembly cannot be performed easily, requiring a lot of time and labor. It was.

The present invention solves the above-mentioned conventional drawbacks, prevents excessive deformation of the plunger or rod due to pressure deformation of the packing member under high pressure, has good followability, and is in close contact with an appropriate pressure contact force. Excellent sealing performance under high pressure atmosphere, good wear resistance, little deterioration, high strength, long mechanical life, easy maintenance and inspection, excellent heat resistance, An object of the present invention is to provide a high-pressure sealing device that has a small number of parts, has a simple structure, and is easy to manufacture, assemble , and replace parts .

The present invention has been made in view of the above problems, and the invention according to claim 1 includes: (A) a planar substantially annular top adapter having a packing housing concave portion having a medium cross section in the bottom surface; and a packing support surface portion having a medium cross section. A plurality of planar bottom annular adapters on the top surface, a plurality of bottom adapters arranged between the top adapter and the bottom adapter, each having a substantially planar planar shape and having a substantially V-shaped or substantially U-shaped cross section. The packing member is formed in a substantially V-shaped or U-shaped shape having a substantially annular plane with a metal and having a medium cross-section, and a packing storage portion is provided on the lower surface, and is interposed between the packing members. and a backup ring that is, the top adapter, the bottom adapter, the packing member, the plunger or the rod is inserted into the backup ring It assembled target device for pumping a liquid under high pressure atmosphere established a whole shape of the packing member by the compression force from the axial direction by tightening the fastening bolt, in the high-pressure sealing device to be fixed,
(B) The packing member is formed of a relatively hard synthetic resin that can withstand a high pressure atmosphere of 100 MPa or more ,
(C) The upper surface and the lower surface of the packing member, or the upper surface or the lower surface of the packing member, and the top adapter, the upper surface or the lower surface of the backup ring, or the upper surface of the bottom adapter, between at least two parties , A deformation permissible gap is provided that allows the packing member to be compressed and deformed by the compressive force of the tightening bolt from the axial length direction ,
(D) When the deformation allowable gap is released from the compression force by the tightening bolt, the contact portion is provided in the vicinity of the center bisector of the thickness of the packing member, and the distance from the contact portion to the outer periphery and the inner periphery is increased. The non-contact portion increases in non-contact area, and the top adapter, the packing member, the backup ring, and the bottom adapter are added to the tightening force of the tightening bolt, and a plunger or a rod is inserted during mounting. It is characterized in that it is deformed by the compressive force caused by the contact and can be brought into close contact .

The invention according to claim 2 of the present application is that, in claim 1 , the inclination angle provided on the upper surface of the packing member is provided on the lower surface of the packing accommodation recess provided on the lower surface of the top adapter and on the lower surface of the backup ring. In addition, the inclination angle of the packing member formed at an acute angle widening toward the high pressure side than the inclination angle of the packing housing portion, the inclination angle provided on the lower surface of the packing member, the inclination angle provided on the upper surface of the backup ring, and the bottom adapter It is characterized by being formed at an obtuse angle that is wider than the inclination angle provided on the upper surface.

According to a third aspect of the present invention, in the first or second aspect , the packing storage recess provided on the lower surface of the top adapter has an inclination angle provided on the upper surface of the packing member, and the backup ring. The inclination angle provided on the upper surface of the backup ring is formed at an acute angle that is wider toward the high pressure side than the inclination angle of the packing storage portion provided on the lower surface of the packing member. , And an obtuse angle wider than the inclination angle provided on the upper surface of the bottom adapter, and the upper surface and the lower surface of the packing member are near the center bisector with respect to the top adapter, the backup ring, and the bottom adapter The deformation-allowing gap is provided as the distance from the contact portion provided to the outer periphery and the inner periphery increases. And butterflies.

In addition, the invention according to claim 4 of the present invention is the packing storage recess according to any one of claims 1 to 3 , wherein the inclination angle provided on the upper surface of the packing member is provided on the lower surface of the top adapter, and The inclination angle provided on the lower surface of the packing member substantially coincides with the inclination angle of the packing housing portion provided on the lower surface of the backup ring, and the inclination angle of the upper surface of the backup ring and the upper surface of the bottom adapter. The packing member is formed with an obtuse angle wider than the angle, and the lower surface of the packing member is moved away from the contact portion provided in the vicinity of the center bisector with respect to the backup ring and the bottom adapter toward the outer periphery and the inner periphery. The deformation allowable gap is provided.

The invention according to claim 5 of the present invention is the packing storage recess according to any one of claims 1-4, wherein the inclination angle provided on the upper surface of the packing member is provided on the lower surface of the top adapter, and An inclination angle formed on the lower surface of the packing member is formed on the upper surface of the backup ring. The contact surface is formed substantially in agreement with the angle and the inclination angle provided on the upper surface of the bottom adapter, and the upper surface of the packing member is provided in the vicinity of the central bisector with respect to the backup ring and the bottom adapter. The deformation permitting gap is provided as the part moves away from the outer periphery and the inner periphery.

The invention according to claim 6 of the present invention is the method according to any one of claims 1 to 5 , wherein the packing member is provided at least on the inner peripheral surface slidably in close contact with the plunger or rod from the high pressure side. A lip portion having a slope whose cross-sectional area gradually decreases is provided on the low-pressure side.

In addition, the invention according to claim 7 of the present invention is the invention according to any one of claims 1-6, wherein the inner circumferential side and the outer circumferential side of the packing member have a lower end on the upper end side with respect to the central bisector. characterized in that it is formed in the squeeze a few degrees away than the side.

The invention according to claim 8 of the present invention is the method according to any one of claims 1 to 7 , wherein the packing member is a polyamide resin, a polyether-ether-ketone resin, a polyethylene resin, a polystyrene resin, or a polyvinyl chloride resin. It is formed by.

The invention according to claim 9 of the present invention is the method according to any one of claims 1 to 8 , wherein at least one member of the top adapter, the backup ring, and the bottom adapter is phosphor bronze or stainless steel. It is formed of a metal material selected from any one of aluminum bronze, white and beryllium copper alloys.

The invention according to claim 1 0 of the present invention, in any one of claims 1 -9, wherein the central two lower surface of the top adapter, and an upper surface of the backup ring, and the upper surface of the bottom adapter A contact portion of the packing member formed in the vicinity of the bisector is formed in an arc portion having a desired radius centered on the central bisector.

The invention of claim 1 of the present invention, in any one of claims 1 -10, the lower surface of the top adapter, and an upper surface of the backup ring, and the packing member against the top surface of the bottom adapter The non-contact portions formed on the inner peripheral side and the outer peripheral side are formed in a substantially triangular section in line symmetry with respect to the central bisector of the thickness of the packing member.

The invention according to claim 1 2 of the present invention, in any one of claims 1 -11 the angle of inclination of the upper surface of said packing member, and the upper surface inclination angle of the backup ring, and the top surface of the bottom adapter Is formed at 57.5 degrees with respect to the center bisector of the thickness of the packing member, and is provided on the packing housing recess provided on the lower surface of the top adapter and on the lower surface of the backup ring. The packing storage portion is formed at 60 degrees with respect to the central bisector.

The invention according to claim 1 3 of the present invention, in any one of claims 1 -12, upper and lower surfaces of said packing member, and the inclination angle of the packing receiving recess formed on the lower surface of the top adapter, The upper surface of the backup ring and the upper surface of the bottom adapter are formed at 57.5 degrees with respect to the central bisector, and are formed at 60 degrees with respect to the central bisector. And

According to the invention described in claim 1 of the present invention, a planar substantially annular top adapter having a packing housing recess having a medium cross section on the bottom surface, a planar generally annular bottom adapter having a packing supporting surface portion having a medium cross section on the top surface, A plurality of packing members disposed between the top adapter and the bottom adapter and having a substantially planar shape and having a substantially V-shaped or substantially U-shaped cross section, and a substantially planar shape made of metal. And a backup ring that is formed in a substantially V-shaped or U-shaped section with a middle height in cross section, a packing housing portion is provided on the lower surface, and is interposed between the packing members, and the top A plunger or a rod is inserted into the adapter, the bottom adapter, the packing member, and the backup ring, and the axial length direction by tightening the tightening bolt Assembled target device for pumping a liquid under high pressure atmosphere established a whole shape of the packing member by the compression force of al, the high-pressure seal device that is secured compared, the packing member, to withstand the high pressure atmosphere over 100MPa or more The upper surface and the lower surface of the packing member or the upper surface or the lower surface of the packing member and the upper surface of the top adapter, the upper surface or the lower surface of the backup ring, and the upper surface of the bottom adapter. Among them, at least two members are provided with a deformation permissible gap that allows the packing member to be compressed and deformed by the compressive force of the tightening bolt from the axial length direction, and the deformation permissible space is compressed by the tightening bolt. a contact portion provided in the vicinity of the center bisector of the thickness of the packing member at the time of power release, out of the contact portion And a non-contact portion whose non-contact area increases as it moves away from the inner circumference, and when mounting, the top adapter, the packing member, the backup ring, and the bottom adapter are added to the tightening force of the tightening bolt. When the compression force is released when the compression force is not applied to the packing member by tightening bolts, etc. A deformation permissible gap is provided between at least two of the upper surface and lower surface of the member, or the upper surface or lower surface of the packing member and the upper surface of the top adapter, the upper surface or lower surface of the backup ring, and the upper surface of the bottom adapter. (In this case, it is different from volume reduction in this specification. It refers to volume decreases as compared to that without the tolerance gap the packing member). When the mounting bolt is attached, the deformation allowable gap of the packing member is compressed and deformed by the compressive force from the axial length direction by the tightening bolt, the interval is narrowed, and the plunger or the rod is inserted in a state where the overall shape is ready. Since the packing member is supported between the metal backup rings, the packing member is supported by the compression force in the axial direction, so that the packing member is prevented from excessive pressure deformation even in a high-pressure atmosphere. As a result, pressure follow-up is promoted, and the followability with respect to the plunger or the rod is improved, and close contact is achieved by an appropriate pressure contact force, excellent sealing performance is exhibited, and liquid leakage is prevented. In addition, since the packing member can be removed and replaced from the packing storage recess of the target device while being held between the metal backup rings, the packing member can be easily replaced. Thus, the plunger or rod slides smoothly and reliably. In addition, since the backup ring provided between the top adapter, the bottom adapter, and the packing member is made of metal, the wear resistance of the packing member against the plunger or rod made of metal is reduced. And suppresses heat generation due to friction. In addition, the packing member formed of a relatively hard synthetic resin that can withstand a high pressure atmosphere of 100 MPa or more is supported and protected between metal backup rings, and the packing member has an excessive pressure even under a high pressure atmosphere. Pressure deformation is promoted in a state in which the deformation is prevented, the plunger or rod is brought into close contact with each other, an excellent sealing property is exhibited, and liquid leakage is prevented. Thus, the plunger or rod slides smoothly and reliably.

  In addition, the wear resistance is good and the deterioration is small, and the mechanical life is prolonged by exhibiting high strength. Moreover, the packing member can be easily maintained and inspected, has excellent heat resistance, has a large number of parts, has a simple structure, and is easy to manufacture and assemble.

According to the invention described in claim 2 , the packing member provided on the lower surface of the top adapter and the packing provided on the lower surface of the backup ring have an inclination angle provided on the upper surface of the packing member. An inclination angle formed on the lower surface of the packing member is formed on an upper surface of the backup ring and an upper surface of the bottom adapter. Further, the contact portion is formed near the center bisector on the upper and lower surfaces of the packing member or the upper or lower surface of the packing member when the compression force is released. The deformation-allowable gap provided so that the non-contact area increases with the distance from the outer circumference to the inner circumference. By tightening the tightening bolt, the space between the deformation-allowable gaps is narrowed, and after adjusting the overall shape of the packing member, the top adapter, the backup ring, and the compression force in the axial direction due to the plunger or rod being inserted into the packing member Since the packing member is supported by deformation between the bottom adapter and the metal backup ring, the packing member is prevented from excessive pressure deformation even in a high-pressure atmosphere, and pressure deformation in the axial direction is promoted. As a result, the followability in the axial length direction with respect to the plunger or the rod is improved and the plunger or the rod is brought into close contact with an appropriate pressure contact force, an excellent sealing property is exhibited, and liquid leakage can be prevented. Thus, the plunger or rod slides in the axial direction. In addition, since the backup ring provided between the top adapter, the bottom adapter, and the packing member is made of metal, the wear resistance of the packing member against the plunger or rod made of metal is reduced. And suppresses heat generation due to friction.

  Thus, the followability in the axial length direction with respect to the plunger or rod accompanying the pressure deformation of the packing member under high pressure is good, and the packing member is in close contact with an appropriate pressure contact force and has excellent sealing properties. Demonstrated. In addition, the wear resistance is good and the deterioration is small, and the mechanical life is prolonged by exhibiting high strength. Moreover, the packing member can be easily maintained and inspected, has excellent heat resistance, has a large number of parts, has a simple structure, and is easy to manufacture and assemble.

According to the invention described in claim 3 of the present invention, the inclination angle provided on the upper surface of the packing member is provided on the packing housing recess provided on the lower surface of the top adapter and on the lower surface of the backup ring. An inclination angle formed on the lower surface of the packing member is an inclination angle provided on the upper surface of the backup ring, and an inclination angle provided on the lower surface of the backup member, and the bottom adapter. The upper and lower surfaces of the packing member are formed in the vicinity of the central bisector with respect to the top adapter, the backup ring, and the bottom adapter. since there is provided the deformable gap with to recede toward the outer periphery and the inner periphery from package during compression release The packing member is provided on the upper surface and lower surface of the packing member or on the upper surface or lower surface of the packing member so that the non-contact area increases in the vicinity of the central bisector from the contact portion to the outer periphery and inner periphery. The deformation allowable gap that reduces the volume of the member is reduced by tightening the tightening bolts at the time of mounting, and the shaft by which the plunger or rod is inserted into the packing member after adjusting the overall shape of the packing member Due to the compressive force in the long direction, the top adapter, backup ring, and bottom adapter are deformed and intimately supported, and the packing member is supported between the metal backup rings, so that the packing member is prevented from excessive pressure deformation even in a high-pressure atmosphere. In this state, the pressure deformation in the axial direction is urged and the plunger or Becomes good followability to the axial direction with respect to, closely by a suitable contact pressure is exerted excellent sealing properties, prevents liquid leakage. Thus, the plunger or rod slides smoothly and reliably. In addition, since the backup ring provided between the top adapter, the bottom adapter, and the packing member is made of metal, the wear resistance of the packing member against the plunger or rod made of metal is reduced. And suppresses heat generation due to friction.

  Thus, the followability in the axial length direction with respect to the plunger or rod accompanying the pressure deformation of the packing member under high pressure is good, and the packing member is in close contact with an appropriate pressure contact force and has excellent sealing properties. Demonstrated. In addition, the wear resistance is good and the deterioration is small, and the mechanical life is prolonged by exhibiting high strength. Moreover, the packing member can be easily maintained and inspected, has excellent heat resistance, has a large number of parts, has a simple structure, and is easy to manufacture and assemble.

According to the invention described in claim 4 of the present invention, the inclination angle provided on the upper surface of the packing member is provided on the packing housing recess provided on the lower surface of the top adapter and on the lower surface of the backup ring. The inclination angle substantially coincides with the inclination angle of the packing storage portion, and the inclination angle provided on the lower surface of the packing member is formed to be an obtuse angle wider than the inclination angle of the upper surface of the backup ring and the upper surface of the bottom adapter. It is, for the lower surface of the packing member, the backup ring, provided with the said deformable gap with to recede toward the outer periphery and the inner periphery from the contact portion provided in the vicinity of the center bisector to bottom adapter When the compression force is released, the packing member moves away from the contact portion in the vicinity of the center bisector to the outer periphery and the inner periphery. The deformation permissible gap provided so as to increase the non-contact area is narrowed by tightening the tightening bolts at the time of mounting, and the plunger or rod is attached to the packing member after adjusting the overall shape of the packing member. As the packing member is supported between the metal backup ring and the back-up ring and the bottom adapter are deformed in close contact with the back-up ring and bottom adapter by the compressive force in the axial direction due to the insertion of the packing member, the packing member can be used even in a high-pressure atmosphere. In the state where excessive pressure deformation is prevented, pressure deformation in the axial length direction is promoted, and the followability in the axial length direction with respect to the plunger or the rod is improved, and it is in close contact with an appropriate pressure contact force and excellent Sealing performance is demonstrated and liquid leakage can be prevented. Thus, the plunger or rod slides smoothly and reliably. In addition, since the backup ring provided between the top adapter, the bottom adapter, and the packing member is made of metal, the wear resistance of the packing member against the plunger or rod made of metal is reduced. And suppresses heat generation due to friction.

  In this way, the packing member becomes better in the axial direction with respect to the plunger or rod with pressure deformation under high pressure, and the packing member is brought into close contact with the plunger or rod with an appropriate pressure contact force. Excellent sealing performance is demonstrated. In addition, the packing member has good wear resistance and little deterioration, exhibits high strength, and has a long mechanical life. Moreover, the packing member can be easily maintained and inspected, has excellent heat resistance, has a large number of parts, has a simple structure, and is easy to manufacture and assemble.

According to the invention described in claim 5 of the present invention, the inclination angle provided on the upper surface of the packing member is provided on the packing housing recess provided on the lower surface of the top adapter and on the lower surface of the backup ring. The inclination angle formed on the lower surface of the packing member is an inclination angle provided on the upper surface of the backup ring, and the upper surface of the bottom adapter. The upper surface of the packing member is far from the contact portion provided in the vicinity of the center bisector with respect to the backup ring and the bottom adapter. than it provided with the deformation allowing gap due to the retreat, when the compressive force released the upper and lower surfaces of the top adapter of the packing member Alternatively, the deformation tolerance provided between the upper surface of the packing member and the lower surface of the backup ring so that the non-contact area increases in the vicinity of the central bisector from the contact portion to the outer periphery and the inner periphery. The volume of the packing member is reduced in the axial length direction by the gap. Then, by tightening the tightening bolts at the time of mounting, the space between the deformation permissible gaps is narrowed, and the overall shape of the packing member is adjusted, and then the plunger or rod is inserted into the packing member due to the compressive force in the axial direction. The deformation-allowable gap is deformed and intimately contacted with the top adapter and the backup ring, and the packing member is supported between the metal backup rings, so that the packing member has an axial length in a state where excessive pressure deformation is prevented even under a high pressure atmosphere. The pressure deformation in the direction is promoted, and the followability in the axial direction with respect to the plunger or the rod is improved, the contact is made by an appropriate pressure contact force, the excellent sealing performance is exhibited, and the liquid leakage can be prevented. Thus, the plunger or rod slides smoothly and reliably. In addition, since the backup ring provided between the top adapter, the bottom adapter, and the packing member is made of metal, the wear resistance of the packing member against the plunger or rod made of metal is reduced. And suppresses heat generation due to friction.

  Thus, the followability with respect to the plunger or rod accompanying the pressure deformation of the packing member under high pressure is good, and the packing member is brought into close contact with an appropriate pressure contact force, so that excellent sealing performance is exhibited. In addition, the packing member has good wear resistance and little deterioration, exhibits high strength, and has a long mechanical life. Moreover, the packing member can be easily maintained and inspected, has excellent heat resistance, has a large number of parts, has a simple structure, and is easy to manufacture and assemble.

According to a sixth aspect of the present invention, the packing member has a cross-sectional area that gradually decreases from the high pressure side to the low pressure side on at least the inner peripheral surface that is slidably in close contact with the plunger or rod. than lip slopes is Ru provided for, packing member which is not provided in the packing member gradually lip slopes sectional area decreases the volume reduction which is volume-reduced (in this case, in the present specification This means that the volume is reduced compared to the pressure limit), so that the pressure deformation is promoted in a state where excessive pressure deformation such as exceeding the stress limit and elastic limit is prevented, so that the followability to the plunger or rod is good. Thus, close contact is achieved by an appropriate pressure contact force, and excellent sealing performance is exhibited to prevent liquid leakage, and friction against the plunger or rod is reduced, and wear resistance is improved.

Moreover, according to invention of Claim 7 of this invention, as for the side surface of the inner peripheral side and outer peripheral side of the said packing member, an upper end side is squeezed several times rather than a lower end side with respect to the said center bisector. than is formed Ru, packing member is stress limit, moderately is to plunger prompted pressure deformation becomes favorable followability to the rod in a state in which excessive pressure deformation is prevented, such as exceeding the elastic limit, suitably The pressure contact force makes it close and exhibits excellent sealing properties to prevent liquid leakage, while reducing friction against the plunger or rod and improving wear resistance.

Further, according to the invention described in claim 8 of the present invention, the packing member, a polyamide resin, polyether ether ketone resin, Ru is formed by a polyethylene resin, polystyrene resin, or polyvinyl chloride resin the by a relatively rigid withstand high pressure and, to the plunger due to pressure deformation under high pressure is a good followability to the rod, excellent sealing property by close contact with an appropriate pressing force In addition, it is possible to obtain a product with good wear resistance and little deterioration, high strength, long mechanical life and excellent heat resistance.

According to the ninth aspect of the present invention, at least one member of the top adapter, the backup ring, and the bottom adapter is phosphor bronze, stainless steel, aluminum bronze, white, beryllium copper. than Ru is formed of a metal material selected from any one of the alloys, improving in under high pressure, the top adapter, the backup ring, wear resistance to the bottom adapter plunger to the rod In addition, it exhibits high strength and a long mechanical life, and is excellent in heat resistance, rust resistance, and chemical resistance.

Further, according to the invention described in claim 1 0 of the present invention, the lower surface of the top adapter, and an upper surface of the backup ring, and the contact portion with respect to the upper surface of the bottom adapter, the center bisector than Ru is formed in a circular arc portion having a desired radius around the packing member lower surface of the top adapter, and the upper surface of the backup ring, it is supported by being sandwiched between the backup ring at the contact portion of the circular arc portion, This contact portion is in close contact with the top adapter and the backup ring in a balanced manner and exhibits a sealing property even under high pressure, thereby reliably exhibiting liquid leakage.

Further, according to the invention described in claim 1 of the present invention, the lower surface of the top adapter, and an upper surface of the backup ring, and an inner peripheral side of the packing member to the upper surface of the bottom adapter, and the outer the non-contact portion to be formed, than formed approximately triangular cross section symmetrically with respect to the center bisector of the thickness of the packing member, the packing member includes a central bisector of the thickness during compression release The packing member is reduced in volume by the non-contact portion. At the time of mounting, the space between the deformation-permitting gaps is narrowed by tightening the tightening bolts, and the compression force in the axial direction is generated by inserting the plunger or rod into the packing member after adjusting the overall shape of the packing member. Since the non-contact member is compressed and compressed by the packing member, excessive pressure deformation is prevented with respect to the plunger or rod, and pressure deformation is promoted in the axial direction in a balanced manner on the left and right sides. Since several pieces in the long direction are dispersed and receive high pressure, the packing member is brought into close contact with the plunger or rod with an appropriate pressure contact force, and excellent sealing performance is exerted to ensure liquid leakage. To prevent. Moreover, on the inner peripheral side of the packing member, wear on the plunger or rod of the packing member is reduced to improve wear resistance, heat generation due to wear is suppressed, and life resistance is improved.

Further, according to the invention described in claim 1 2 of the present invention, the angle of inclination of the upper surface of the inclination angle, and the backup ring of the upper surface of the packing member, and the angle of inclination of the upper surface of the bottom adapter, the packing member Are formed at 57.5 degrees with respect to the central bisector of the thickness of the top adapter, and the packing storage recess provided on the lower surface of the top adapter and the packing storage portion provided on the lower surface of the backup ring are than formed 60 degrees with respect to the bisector, so that the upper and lower surfaces of the packing member noncontact area with to become distant from the center bisector vicinity of the contact portion during compression release increases The packing member is reduced in volume by being provided with a deformation | transformation tolerance space | gap. The deformation permissible gap is narrowed by tightening the tightening bolt, and the space between the deformation permissible gaps is reduced. After the overall shape of the packing member is adjusted, the plunger or rod is inserted into the packing member in the axial direction. It is deformed at the time of mounting by the compressive force, and excessive pressure deformation is prevented with respect to the plunger or the rod by close contact. In addition, the packing member is balanced in the left and right directions and pressure deformation is promoted, and several pieces are dispersed in the axial length direction to receive high pressure, and the packing member has an appropriate pressure contact force against the plunger or the rod. In close contact, excellent sealing performance is exhibited, and liquid leakage is prevented. Moreover, on the inner peripheral side of the packing member, wear on the plunger or rod of the packing member is reduced to improve wear resistance, heat generation due to wear is suppressed, and life resistance is improved.

Further, according to the invention described in claim 1 3 of the present invention, upper and lower surfaces of said packing member, and the inclination angle of the packing receiving recess formed on the lower surface of the top adapter with respect to the center bisector converting mechanism is formed 60 degrees, the upper surface of the backup ring, and the upper surface of the bottom adapter, the underside of the than formed 57.5 degrees with respect to the center bisector, packing member at the time of compression release Further, the packing member is reduced in volume by a deformation allowable gap provided so that the non-contact area increases as the distance from the contact portion increases in the vicinity of the central bisector. When mounting, the space between the deformation-permitting gaps is narrowed by tightening the tightening bolts, and the compression force in the axial direction is generated by inserting the plunger or rod into the packing member after adjusting the overall shape of the packing member. As a result, the packing member is compressed and deformed so that the allowable deformation gap is in close contact, and the packing member is supported between the metal backup rings, so that the packing member is pressurized in a state in which excessive pressure deformation is prevented even under a high pressure atmosphere. Deformation is promoted, and the followability in the axial direction with respect to the plunger or the rod becomes good, it is brought into close contact with an appropriate pressure contact force, an excellent sealing property is exhibited, and liquid leakage is prevented. Thus, the plunger or rod slides smoothly and reliably. In addition, since the backup ring provided between the top adapter, the bottom adapter, and the packing member is made of metal, the wear resistance of the packing member against the plunger or rod made of metal is reduced. And suppresses heat generation due to friction.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

[Embodiment 1]
FIG. 1 is a cross-sectional view of a high-pressure sealing device according to a first embodiment of the present invention when releasing a compressive force, FIG. 2 is an enlarged cross-sectional view showing a part of the high-pressure sealing device, and FIG. FIG. 4 is an enlarged cross-sectional view showing a part of the high-pressure sealing device, and FIG. 5 is a cross-sectional view showing a use state in which the high-pressure sealing device is similarly attached to the target device.

  1 to 5, Embodiment 1 of the sealing device of the present invention is a plane having a substantially annular top adapter 1 having a packing housing recess 2 having a medium cross section on the bottom surface and a packing support surface portion 4 having a medium cross section on the top surface. A plurality of annular adapters arranged between a substantially annular bottom adapter 3 and the top adapter 1 and the bottom adapter 3, having a substantially planar shape and having a substantially V-shaped or substantially U-shaped cross-section. The packing member 5 is formed of a metal and is substantially annular in a plane and has a substantially V-shaped or substantially U-shaped cross section, and a packing storage portion 7 is provided on the lower surface. In the high-pressure sealing device A in which the backup ring 6 to be interposed is assembled, the packing member 5 is formed of a relatively hard synthetic resin, and the upper surface 5a and the lower side of the packing member 5 5b, or the upper surface 5a or the lower surface 5b of the packing member 5, and the opposing surfaces of the top adapter 1, the upper surface 6a or the lower surface 6b of the backup ring 6, and the upper surface 3a of the bottom adapter 3 between at least two parties. It is characterized in that a deformation-allowing gap K is provided in which the packing member 5 can be compressed and deformed by a compressive force from the axial direction X to be brought into close contact.

  The packing member 5 is formed of any one of polyamide resin, polyether / ether / ketone resin, polyethylene resin, polystyrene resin, and polyvinyl chloride resin. Desirably, the packing member 5 is made of a polyamide resin or a polyether ether ketone resin and is relatively hard to withstand high pressure. The reason why the packing member 5 is formed to be relatively hard is to improve the followability with respect to the plunger or rod R accompanying pressure deformation under high pressure. This is because it exerts an excellent sealing property by being in close contact with a force and reliably prevents liquid leakage. In addition, the packing member 5 has relatively good wear resistance, little deterioration, little wear debris, high strength, long mechanical life, and excellent heat resistance. The packing member 5 is formed using a hard synthetic resin.

  In FIG. 2, the deformation allowable gap K is moved away from the contact portion 8 to the outer circumference and the inner circumference when the compressive force is released, and the contact portion 8 provided in the vicinity of the center bisector M of the thickness t of the packing member 5. And the non-contact portion 9 whose non-contact area increases. Then, the deformation allowable gap K is narrowed by tightening the tightening bolt 10 for assembling and fixing the top adapter 1, the packing member 5, the backup ring 6, and the bottom adapter 3 at the time of mounting. When the plunger or rod R is inserted into the packing member 5 after adjusting the overall shape, the packing member 5 is deformed by the compressive force in the axial length direction X so as to be closely attached.

  Since the contact portion 8 is formed in a circular arc portion 8A having a desired radius r centered on the central bisector M, the packing member 5 is provided on the lower surface of the top adapter 1 and the upper surface of the backup ring 6. Even under high pressure by being sandwiched between the backup ring 6 and in close contact with the lower surface of the top adapter 1, the upper surface of the backup ring 6, and the upper surface of the bottom adapter 3 at the contact portion 8. Excellent sealing performance.

  That is, in the first embodiment, the deformation allowance gap K has an inclination angle θ1 provided on the upper surface of the packing member 5 such that the packing housing recess 2 provided on the lower surface of the top adapter 1 and the lower surface of the backup ring 6 are provided. It is formed at an acute angle that spreads toward the high-pressure side P1 with respect to the inclination angle θ2 of the packing storage portion 7 provided at the top. Further, the inclination angle θ3 provided on the lower surface of the packing member 5 is formed to have an obtuse angle that is wider than the inclination angle θ4 provided on the upper surface of the backup ring 6 and the inclination angle θ4 provided on the upper surface of the bottom adapter 3. Is done.

  Specifically, in the first embodiment, in order to form the deformation allowable gap K, as shown in FIGS. 1 and 2, the inclination angle θ1 of the upper surface 5a of the packing member 5, and the backup ring 6 is formed at 57.5 degrees with respect to the center bisector M of the thickness t of the packing member 5, and the inclination angle θ4 of the upper surface 6a of the bottom surface 6 and the inclination angle θ4 of the top surface of the bottom adapter 3 are The packing storage recess 2 provided on the lower surface of the top adapter 1 and the packing storage portion 7 provided on the lower surface of the backup ring 6 are formed at 60 degrees with respect to the central bisector M. The numerical values of θ1 and θ4 are not limited to this, and the illustration is a representative example.

  Furthermore, the non-contact part 9 formed on the inner peripheral side of the packing member 5 and the outer peripheral side with respect to the lower surface of the top adapter 1 and the upper surface of the backup ring 6 and the upper surface of the bottom adapter 3, The packing member 5 is formed to have a substantially triangular cross section in line symmetry with respect to the center bisector M of the thickness t of the packing member 5. In this way, the non-contact portion 9 is formed in a substantially triangular section in line symmetry with respect to the central bisector M of the thickness t of the packing member 5, so that the tightening bolt 10 is tightened when the packing member 5 is mounted. By narrowing the deformation allowable gap K and adjusting the overall shape of the packing member 5, the plunger or rod R is inserted into the packing member 5, so that the packing member 5 is compressed and deformed by the compressive force in the axial length direction I. Thus, the non-contact portion 9 is brought into close contact with the plunger or rod R to prevent excessive pressure deformation such as exceeding the stress limit and the elastic limit, and the pressure deformation is promoted in a balanced manner on the left and right. Since several parts are dispersed at X and receive high pressure, the packing member 5 is in close contact with the plunger or rod R with an appropriate pressure contact force and has excellent sealing performance. It is volatilization. Moreover, on the inner peripheral side of the packing member 5, the wear of the packing member 5 on the plunger or rod R is reduced, the wear resistance of the packing member 5 is improved, the heat generated by the wear is suppressed, and the life resistance is improved. Be improved.

  In this way, a packing member formed to withstand high pressure using a relatively hard synthetic resin such as polyamide resin, polyether ether ketone resin, polyethylene resin, polystyrene resin, or polyvinyl chloride resin. 1 and 2 when the compression force is released as shown in FIGS. 1 and 2 so that the non-contact area increases in the vicinity of the central bisector M as the distance from the contact portion 8 increases. The deformation allowable gap K is formed by tightening the tightening bolt 10 to narrow the interval of the deformation allowable gap K, and after the overall shape of the packing member 5 is adjusted, the plunger or the rod R is inserted into the packing member 5. 3 through 5 is compressed and deformed by the compressive force in the axial direction X and brought into close contact with the plunger or rod R. And, excessive pressure deformation is prevented. In addition, the packing member is balanced in the left-right direction and pressure deformation is promoted, and several members are dispersed in the axial length direction X and receive high pressure. Therefore, the packing member 5 is suitable for the plunger or rod R. It is intimately contacted with a good pressure contact force, exhibits excellent sealing properties, and can reliably prevent liquid leakage. The packing member 5 formed according to the first embodiment can withstand high pressures of 100 (MPa) or higher and exhibits excellent sealing performance, as well as under a pressure of 100 (MPa) or lower. Preferably, it can withstand high pressures of 280 (MPa) or more and exhibits excellent sealing properties, and liquid leakage can be reliably prevented.

  In addition, as described above, the deformation allowable gap K provided in the upper surface 5a and the lower surface 5b of the packing member 5 is expanded when the compression force is released, and compressed by tightening in the axial length direction X by the tightening bolt 10 when used. Since it is brought into close contact under force, on the inner peripheral side of the packing member 5, the wear of the packing member 5 on the plunger or rod R is reduced to improve wear resistance, thereby causing cracks, The close contact point between the plunger and the rod R exceeds the stress limit and the elastic limit, so that it will not be damaged and worn out. This eliminates the trouble of cleaning and enables continuous operation for several hundred hours or more. Can be easily maintained and inspected by reducing the labor and labor of exchanging new ones.

  Reference numeral 11 denotes a lip portion having an inclined surface 11a whose cross-sectional area gradually decreases from the high pressure side to the low pressure side on at least the inner peripheral surface of the packing member 5 slidably in close contact with the plunger or rod R. The lip portion 11 prevents excessive pressure deformation such as exceeding the stress limit and elastic limit, and the pressure deformation is promoted, and the followability to the plunger or rod R that reciprocates in the axial direction X is good. Accordingly, the plunger or rod R is brought into close contact with an appropriate pressure contact force, and an excellent sealing performance is exhibited, and friction against the plunger or rod R is reduced, so that wear resistance is improved.

  That is, the lip portion 11 has an inner side and an outer side surface of the packing member 5 with an inclination angle α of several degrees on the upper end side with respect to the central bisector M from the lower end side. In the first aspect, by providing the inclined surface 11a of about 5 degrees, the packing member 5 is prevented from excessive pressure deformation such as exceeding the stress limit and the elastic limit, and the pressure deformation is promoted, and the plunger or rod R Therefore, the wear resistance is improved because friction with respect to the plunger or the rod R is reduced. The increase / decrease change of the inclined surface 11a is set freely according to the hardness, thickness, height, etc. of the packing member 5, for example, so that the sealing performance and wear resistance for the plunger or rod R are improved. Appropriate selection and adjustment can be made.

  In addition, at least one member of the top adapter 1, the backup ring 6, and the bottom adapter 3 is, for example, phosphor bronze (2 types or 3 types), stainless steel (SUS329J4L), aluminum bronze (2 types, Alternatively, it is formed of a material selected from any one of 3 types), white (2 types or 3 types), and beryllium copper alloys. As described above, at least one member of the top adapter 1, the backup ring 6, and the bottom adapter 3 is any one of phosphor bronze, stainless steel, aluminum bronze, white, beryllium copper alloy as described above. The packing material 5 is formed of a metal material selected from 1 under high pressure, and exhibits good wear resistance to the plunger and rod R formed of cemented carbide to reduce deterioration. At the same time, in addition to extending the mechanical life by exhibiting high strength, it is also excellent in heat resistance, rust prevention and chemical resistance.

  Embodiment 1 of the sealing device of the present invention has the above-described configuration, and this sealing device is a high-pressure homogenizing device for processing and subdividing raw materials, and in a packing housing recess 12 of a target device B such as a high-pressure pump. In order to assemble and mount, first, a flat substantially annular top adapter 1 having a packing housing recess 2 with a medium cross section on the bottom surface, and a flat substantially annular bottom adapter 3 having a packing support surface portion 4 with a medium cross section on the top surface. Is placed between the top adapter 1 and the bottom adapter 3. A relatively hard synthetic of any of polyamide resin, polyether ether ketone ketone, polyethylene resin, polystyrene resin, and polyvinyl chloride resin is provided between the top adapter 1 and the bottom adapter 3. A plurality of packing members 5 having a substantially annular shape and a substantially V-shaped or substantially U-shaped cross section formed of resin, and the packing members 5 They are alternately stacked and a backup ring 6 interposed 互間, capped F, narrowing the distance between the deformation allowing gap K by tightening a plurality of fastening bolts 10, adjust the overall shape of the packing member 5. At this time, the number of packing members 5 and backup rings 6 to be used is selected assuming a normal internal pressure at which the target device B is to be sealed, and the increase / decrease change is freely set.

In addition, the packing member 5 of the first embodiment formed of a relatively hard synthetic resin has an upper surface on the inner peripheral side and the outer peripheral side when the compression force is released until the tightening force is applied by the tightening bolt 10. 5a and the lower surface 5b, the lower surface of the top adapter 1 that the upper surface 5a and the lower surface 5b face each other, the upper surface 6a or the lower surface 6b of the backup ring 6 and the upper surface of the bottom adapter 3 that face each other. deformation allowing gap K to face the side P 1 is formed (see FIG. 1, FIG. 2).

  When the plunger and the rod R are inserted into the packing assembly housed in the packing housing recess 12 from above the lid member F, in addition to the tightening force of the plurality of tightening bolts 10 described above, the plunger, Alternatively, the packing member 5 is compressed and deformed in the axial length direction X by the compressive force in the axial length direction X due to the insertion of the rod R, so that the deformation allowable gap K is in close contact (see FIG. 5). At this time, the packing member 5 may be formed of a relatively hard synthetic resin such as a polyamide resin, a polyether / ether / ketone resin, a polyethylene resin, a polystyrene resin, or a polyvinyl chloride resin. The volume is reduced by forming a deformation allowable gap K between the upper surface 5a and the lower surface 5b, the lower surface of the top adapter 1, the upper surface 6a or the lower surface 6b of the backup ring 6, and the upper surface of the bottom adapter 3. Therefore, the packing member 5 can be quickly and easily without difficulty and is prevented from excessive pressure deformation in the axial direction X and the radial direction or the circumferential direction intersecting the axial direction X. Because pressure deformation is urged, the plunger or rod R is brought into close contact with an appropriate pressure contact force, and excellent sealing performance is exhibited. Flip no. Moreover, since the packing member 5 has good followability with respect to the plunger or rod R that is reciprocated in the axial direction X, the stress limit and the elastic limit are exceeded even under high pressure where the target device B is operated. Is prevented from excessive pressure deformation (see FIGS. 2 and 4). Thus, the plunger or rod R slides back and forth in the axial direction X in a liquid-tight manner inside the top adapter 1, the packing member 5, the backup ring 6, and the bottom adapter 3 that are substantially ring-shaped. .

  At this time, the packing member 5 of the first embodiment has the inclination angle θ1 provided on the upper surface 5a as described above provided on the packing housing recess 2 provided on the lower surface of the top adapter 1 and the lower surface of the backup ring 6. Further, the inclination angle θ3 provided on the lower surface 5b of the packing member 5 is the inclination angle provided on the upper surface 6a of the backup ring 6 while being formed at an acute angle that spreads toward the high pressure side relative to the inclination angle θ2 of the packing storage portion 7. θ4 and an obtuse angle that is wider than the inclination angle θ4 provided on the upper surface of the bottom adapter 3, and the upper surface 5 a and the lower surface 5 b of the packing member 5 are centered on the top adapter 1, the backup ring 6, and the bottom adapter 3. The deformation allowance gap K is provided as the contact portion 8 provided in the vicinity of the equipartition line M moves away from the outer periphery and the inner periphery. Therefore, the packing member 5 receives the compressive force in the axial length direction X of the tightening bolt 10 in the deformation allowable gap K and is attached to the lower surface of the top adapter 1, the upper and lower surfaces of the backup ring 6, and the upper surface of the bottom adapter 3. Although the packing member 5 is brought into close contact in a state where the volume has been reduced in advance by providing the deformation allowable gap K, the load that is excessively deformed by pressure such as exceeding the stress limit and the elastic limit is reduced. The

  At this time, the non-contact portion 9 formed on the inner peripheral side and the outer peripheral side of the packing member 5 is divided into the center bisection of the thickness t of the packing member 5 when the compression force is released by the tightening bolt 10 as described above. Since the packing member 5 is provided with a non-contact portion 9 with respect to the plunger or the rod R, the pressure deformation is prevented from being excessively deformed. Since the pressure deformation is promoted in a balanced manner with the central bisector M as a boundary, and several pieces are dispersed in the axial direction X and receive high pressure, packing against the plunger or rod R The member 5 is brought into close contact with an appropriate pressure contact force.

  Moreover, the upper surface 5a and the lower surface 5b of the packing member 5 are moved away from the contact portion 8 provided in the vicinity of the center bisector M with respect to the top adapter 1, the backup ring 6, and the bottom adapter 3 toward the outer periphery and the inner periphery. Since the deformation allowable gap K having a substantially triangular cross section is provided in line symmetry with respect to the central bisector M, the packing member 5 is not assembled to the bottom adapter 3, the backup ring 6, and the top adapter 1 without displacement. It can be done with high accuracy.

In addition, the packing member 5 has a cross-sectional area that gradually decreases from the high pressure side to the low pressure side on the inner and outer side surfaces, at least the inner surface that is slidably in contact with the plunger or rod R. In addition, a lip portion 11 of an inclined surface 11a formed with an inclination angle α of several degrees from the lower end side with respect to the center bisector M, for example, approximately 5 degrees, is provided, and a plunger or rod R Since the sliding surface that is slidably close to the surface is reduced in volume in the radial direction, the packing member 5 is subjected to pressure deformation in a state in which excessive pressure deformation such as exceeding the stress limit and elastic limit is prevented. As a result, the followability with respect to the plunger or the rod R is improved, and it is brought into close contact with an appropriate pressure contact force, and an excellent sealing property is exhibited. Moreover, friction against the plunger or rod R is reduced, and wear resistance is improved. Thus, the packing member 5 has good wear resistance and less deterioration, so that no abrasion debris is generated. Further, since the packing member 5 is protected by being interposed between the backup rings 6 formed of metal, for example, phosphor bronze, it exhibits high strength even under high pressure and high temperature, and has a mechanical life. become longer. For this reason, the packing member 5 can be exchanged by taking it out from the packing recess 12 while being held between the metal backup rings 6 , saving labor and labor for exchanging with a new one or cleaning the worn debris. In addition, maintenance and inspection are easy, heat resistance is excellent, and the number of parts is large, the structure is simple, and manufacture and assembly are easy.

  Further, the backup ring 6 provided between the top adapter 1 and the bottom adapter 3 and the packing member 5 is made of metal, for example, phosphor bronze described above, stainless steel, aluminum bronze, white, beryllium copper alloy. Since it is formed of a metal material selected from any one, the top adapter 1, the bottom adapter 3, and the backup ring 6 are resistant to a plunger or a rod R formed of super hard metal under high pressure. It has good wear resistance and less deterioration, and also exhibits high strength and long mechanical life, and is excellent in heat resistance, rust resistance, and chemical resistance.

  As described above, the packing member 5 of the first embodiment has a stress limit not only at a pressure of 100 (MPa) or less, but also at a pressure of 100 (MPa) or more, more preferably 280 (MPa) or more. Excessive compressive deformation such as exceeding the elastic limit is prevented, the followability to the plunger or the rod R is improved, and the plunger or the rod R is brought into close contact with an appropriate pressure contact force. Performance is exhibited, and liquid leakage can be reliably prevented. Further, the packing member 5 has good wear resistance, little deterioration, and exhibits high strength, so that the mechanical life is as long as several hundred hours continuous operation and the heat resistance is excellent at 120 ° C. or more. You can get things. In this way, a high-pressure sealant that can be operated for a long period of time, in which the excellent sealability under high pressure and the excellent wearability are balanced, was obtained. Therefore, for example, a high-pressure homogenizer for processing or subdividing raw materials, such as dispersing, emulsifying, or crushing raw materials contained in a suspension under a high-pressure atmosphere, or a high-pressure pump, an internal combustion engine, etc. The target device B is suitable for a sealing device for a rod R or a piston or plunger that slides, and has a wide range of uses.

[Embodiment 2]
FIGS. 6 to 9 show Embodiment 2 of the sealing device of the present invention. FIG. 6 is a cross-sectional view of the high-pressure sealing device of Embodiment 2 of the present invention when the compression force is released, and FIG. FIG. 8 is an enlarged cross-sectional view showing a part of the high-pressure sealing device, FIG. 8 is a cross-sectional view showing a state where a compression force is applied when the high-pressure sealing device is mounted, and FIG. 9 is an enlarged cross-sectional view showing a part of the high-pressure sealing device.

  In the second embodiment, a deformation allowable gap K is provided on the lower surface 5 b of the packing member 5. That is, in Embodiment 2, when the compression force is released to the upper surface 5a and the lower surface 5b of the packing member 5, the lower surface of the top adapter 1, the upper surface 6a and the lower surface 6b of the backup ring 6, and the upper surface of the bottom adapter 3 are used. Unlike the case where the deformation-permissible gap K is provided between the packing housing 5 and the back surface of the packing member 5, the inclination angle θ 1 provided on the upper surface 5 a is set at the packing housing recess 2 provided on the lower surface of the top adapter 1 and the backup. The inclination angle θ3 provided on the lower surface 5b of the packing member 5 substantially coincides with the inclination angle θ′2 of the packing housing portion 7 provided on the lower surface 6b of the ring 6, and the inclination angle of the upper surface 6a of the backup ring 6 The packing member 5 is formed to have an obtuse angle that is wider than θ4 and the inclination angle θ4 of the upper surface of the bottom adapter 6. The lower surface 5b is provided with the deformation permissible gap K as the backup ring 6 and the bottom adapter 3 move away from the contact portion 8 provided in the vicinity of the center bisector M toward the outer periphery and the inner periphery. It is a configuration.

  Specifically, the inclination angles θ1, θ3 of the upper surface 5a and the lower surface 5b of the packing member 5 and the inclination angle θ′2 of the packing housing recess 2 provided on the lower surface of the top adapter 1 are the center bisector M. The inclination angle θ4 of the upper surface 6a of the backup ring 6 and the inclination angle θ4 of the upper surface of the bottom adapter 3 are formed at 57.5 degrees with respect to the central bisector. Is done. These numerical values of the inclination angle θ′2 and the inclination angle θ4 are representative examples, and are not limited thereto.

  In the second embodiment, when the compression force is released by the tightening bolt 10, the non-contact area is increased on the lower surface 5 b of the packing member 5 in the vicinity of the central bisector M from the contact portion 8 to the outer periphery and the inner periphery. Even if the deformation allowable gap K provided so as to increase is smaller than the compression force in the axial direction X of the tightening bolt 10 or the like when mounted on the target device B, the backup ring 6 and the bottom adapter 3, and the packing member 5 is supported between the metal backup rings 6, so that excessive pressure deformation such as exceeding the stress limit and the elastic limit is prevented even in a high pressure atmosphere. In this state, pressure deformation is urged and the followability to the plunger or rod R is improved, and the rod R is brought into close contact with an appropriate pressure contact force, resulting in excellent sealing performance. It is. In this way, the plunger or rod R slides smoothly and reliably. The backup ring 6 provided between the top adapter 1 and the bottom adapter 3 and the packing member 5 is, for example, phosphor bronze, or any one of stainless steel, aluminum bronze, white, beryllium copper alloy. Other than the action of reducing the wear resistance of the packing member 5 with respect to the plunger or rod R formed of metal and suppressing heat generation due to friction. The configuration and operation are the same as those of the first embodiment.

[Embodiment 3]
FIGS. 10 to 13 show Embodiment 3 of the sealing device of the present invention. FIG. 10 is a cross-sectional view of the high-pressure sealing device of Embodiment 3 of the present invention when the compression force is released, and FIG. FIG. 12 is an enlarged sectional view showing a part of the sealing device, FIG. 12 is a sectional view showing a state in which a compression force is applied when the high pressure sealing device is mounted, and FIG. 13 is an enlarged sectional view showing a part of the high pressure sealing device.

  In the third embodiment, unlike the first embodiment, the upper surface 5a of the packing member 5 is provided with a deformation allowable gap K. That is, in the third embodiment, the inclination angle θ1 provided on the upper surface 5a of the packing member 5 has the packing storage recess 2 provided on the lower surface of the top adapter 1 and the lower surface 6b of the backup ring 6 described above. The inclination angle θ3 formed on the lower surface 5b of the packing member 5 is formed at an acute angle that is wider toward the high-pressure side P1 than the inclination angle θ2 of the packing storage portion 7, and the inclination angle provided on the upper surface 6a of the backup ring 6 θ4 and the inclination angle θ4 provided on the upper surface of the bottom adapter 3 are substantially coincident with each other, and the upper surface 5a of the packing member 5 is divided into the central bisection with respect to the backup ring 6 and the bottom adapter 3. The deformation allowable gap K is provided as the contact portion 8 provided in the vicinity of the line M moves away from the outer periphery and the inner periphery.

  In the third embodiment, when the compressive force is released, the center 2 is interposed between the upper surface 5a of the packing member 5 and the lower surface of the top adapter 1 or between the upper surface 5a of the packing member 5 and the lower surface 6b of the backup ring 6. The deformation allowable gap K provided so that the non-contact area increases with distance from the contact portion 8 to the outer periphery and the inner periphery in the vicinity of the equipartition line M is the axial length of the tightening bolt 10 smaller than that of the first embodiment. When the target device B is mounted by the compressive force in the direction X, the top adapter 1 and the backup ring 6 are deformed and brought into close contact with each other, and the packing member 5 is, for example, phosphor bronze, stainless steel, aluminum bronze, white, beryllium. Since it is supported between metal backup rings 6 made of a material selected from any one of copper alloys, packing is performed even in a high-pressure atmosphere. In the state in which excessive pressure deformation such as exceeding the stress limit and the elastic limit is prevented, the pressure deformation is promoted and the followability with respect to the plunger or the rod R is improved, and the member 5 is brought into close contact with an appropriate pressure contact force. Excellent sealing performance is demonstrated. In this way, the plunger or rod R slides smoothly and reliably. The backup ring 6 provided between the top adapter 1 and the bottom adapter 3 and the packing member 5 is, for example, phosphor bronze, or any one of stainless steel, aluminum bronze, white, beryllium copper alloy. Therefore, the wear resistance of the packing member 5 with respect to the plunger or rod R formed of cemented carbide is reduced, and heat generated by friction can be suppressed. Others are the same configurations and operations as those of the first embodiment.

  The present invention prevents over-deformation of the plunger or rod due to pressure deformation of the packing member under high pressure, has good followability, and is excellent in a high-pressure atmosphere in close contact with an appropriate pressure contact force. Performance, good wear resistance, low degradation, high strength, long mechanical life, easy maintenance and inspection, excellent heat resistance, and fewer parts, Suitable for applications and functions that are simple in structure and easy to manufacture and assemble.

FIG. 1 is a cross-sectional view showing a first embodiment of a high-pressure sealing device according to the present invention when releasing a compressive force. FIG. 2 is an enlarged cross-sectional view showing a part of the high-pressure sealing device. FIG. 3 is a cross-sectional view showing a state in which a compressive force is applied when the high-pressure sealing device is mounted. FIG. 4 is an enlarged cross-sectional view showing a part of the high-pressure sealing device. FIG. 5 is a cross-sectional view showing a use state in which the high-pressure sealing device is similarly attached to the target device. FIG. 6 is a cross-sectional view showing a second embodiment of the high-pressure sealing device of the present invention when the compressive force is released. FIG. 7 is an enlarged cross-sectional view showing a part of the high-pressure sealing device. FIG. 8 is a cross-sectional view showing a state in which a compressive force is applied when the high-pressure sealing device is mounted. FIG. 9 is an enlarged sectional view showing a part of the high-pressure sealing device. FIG. 10 is a cross-sectional view showing a third embodiment of the high-pressure sealing device of the present invention when the compressive force is released. FIG. 11 is an enlarged cross-sectional view showing a part of the high-pressure sealing device. FIG. 12 is a cross-sectional view showing a state in which a compressive force is applied when the high-pressure sealing device is mounted. FIG. 13 is an enlarged cross-sectional view showing a part of the high-pressure sealing device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Top adapter 2 Packing storage recessed part 3 Bottom adapter 4 Packing support surface part 5 Packing member 5a Upper surface 5b Lower surface 6 Backup ring 6a Upper surface 6b Lower surface 7 Packing storage part 8 Contact part 9 Non-contact part 10 Tightening bolt 11 Lip part 11a Slope 12 Packing accommodation Concave part A High-pressure seal device B Target device F Lid member K Deformable gap P1 High-pressure side X Axis length direction

Claims (13)

(A) A planar substantially annular top adapter having a packing housing recess having a medium cross section on the bottom surface, a planar generally annular bottom adapter having a packing supporting surface portion having a medium cross section on the top surface, and the top adapter and the bottom adapter. A plurality of packing members arranged in a substantially ring shape and having a substantially V-shaped or substantially U-shaped cross-section, and a substantially V-shape having a substantially ring-shaped and metal-shaped flat surface. Or formed in a substantially U shape, and provided with a packing housing portion on the lower surface, and a backup ring interposed between the packing members , the top adapter, the bottom adapter, the packing member, A plunger or rod is inserted into the backup ring, and the packing is applied by the compressive force from the axial direction by tightening the tightening bolt. Assembled target device for pumping a liquid under high pressure atmosphere established a whole shape of the timber, in the high pressure sealing apparatus to be fixed,
(B) The packing member is formed of a relatively hard synthetic resin that can withstand a high pressure atmosphere of 100 MPa or more ,
(C) The upper surface and the lower surface of the packing member, or the upper surface or the lower surface of the packing member, and the top adapter, the upper surface or the lower surface of the backup ring, or the upper surface of the bottom adapter, between at least two parties , A deformation permissible gap is provided that allows the packing member to be compressed and deformed by the compressive force of the tightening bolt from the axial length direction ,
(D) When the deformation allowable gap is released from the compression force by the tightening bolt, the contact portion is provided in the vicinity of the center bisector of the thickness of the packing member , and the distance from the contact portion to the outer periphery and the inner periphery is increased. The non-contact portion increases in non-contact area, and the top adapter, the packing member, the backup ring, and the bottom adapter are added to the tightening force of the tightening bolt, and a plunger or a rod is inserted during mounting. The high-pressure sealing device is provided so as to be capable of being brought into close contact by being deformed by a compressive force generated by the above (E). The inclination angle provided on the upper surface of the packing member is wider toward the high pressure side than the inclination angle of the packing storage recess provided on the lower surface of the top adapter and the packing storage portion provided on the lower surface of the backup ring. The inclination angle formed on the lower surface of the packing member is formed at an acute angle, and the obtuse angle is wider than the inclination angle provided on the upper surface of the backup ring and the inclination angle provided on the upper surface of the bottom adapter. The high-pressure sealing device according to claim 1 . The inclination angle provided on the upper surface of the packing member is wider toward the high pressure side than the inclination angle of the packing storage recess provided on the lower surface of the top adapter and the packing storage portion provided on the lower surface of the backup ring. In addition to being formed at an acute angle, the inclination angle provided on the lower surface of the packing member is formed at an inclination angle provided on the upper surface of the backup ring and an obtuse angle wider than the inclination angle provided on the upper surface of the bottom adapter, The upper and lower surfaces of the packing member have the deformation-allowable gap as they move away from the contact portion provided in the vicinity of the center bisector with respect to the top adapter, the backup ring, and the bottom adapter toward the outer periphery and the inner periphery. high pressure sealing apparatus as claimed in claim 1 or 2, characterized in that provided. The inclination angle provided on the upper surface of the packing member substantially coincides with the inclination angle of the packing storage recess provided on the lower surface of the top adapter and the packing storage portion provided on the lower surface of the backup ring, and the packing member An inclination angle provided on the lower surface of the back-up ring is formed at an obtuse angle wider than the inclination angle of the upper surface of the backup ring and the upper surface of the bottom adapter, and the lower surface of the packing member includes the backup ring and the bottom adapter. high pressure according to any one of claims 1 -3, characterized in that a said deformable gap with to recede toward the outer periphery and the inner periphery from the contact portion provided in the vicinity of the center bisector to Sealing device. The inclination angle provided on the upper surface of the packing member is wider toward the high pressure side than the inclination angle of the packing storage recess provided on the lower surface of the top adapter and the packing storage portion provided on the lower surface of the backup ring. The packing is formed at an acute angle, and an inclination angle provided on the lower surface of the packing member substantially coincides with an inclination angle provided on the upper surface of the backup ring and the inclination angle provided on the upper surface of the bottom adapter. The upper surface of the member is characterized in that the deformation allowance gap is provided as the backup ring and the bottom adapter move away from the contact portion provided in the vicinity of the center bisector to the outer periphery and the inner periphery. The high-pressure sealing device according to any one of claims 1 to 4 . 2. The packing member according to claim 1, wherein a lip portion having a slope whose cross-sectional area gradually decreases from a high pressure side to a low pressure side is provided on at least an inner peripheral surface where a plunger or a rod is slidably in close contact. -The high pressure sealing device according to any one of 5 to 5 . 7. The packing member according to any one of claims 1 to 6 , wherein the side surfaces on the inner peripheral side and the outer peripheral side are formed such that the upper end side is squeezed several times from the lower end side with respect to the central bisector. A high-pressure sealing device according to claim 1. Said packing member, polyamide resins, polyether ether ketone resin, according to the polyethylene resin, any one of claims 1 7, characterized in that it is formed by any of a polystyrene resin or polyvinyl chloride resin, High pressure sealing device. At least one member of the top adapter, the backup ring, and the bottom adapter is formed of phosphor bronze, or a metal material selected from any one of stainless steel, aluminum bronze, white, and beryllium copper alloy. The high-pressure sealing device according to any one of claims 1 to 8 , wherein The contact portion is formed in an arc portion having a desired radius centered on the central bisector with respect to the lower surface of the top adapter, the upper surface of the backup ring, and the upper surface of the bottom adapter. The high-pressure sealing device according to any one of claims 1 to 9 . A non-contact portion formed on the inner peripheral side and the outer peripheral side of the packing member with respect to the lower surface of the top adapter, the upper surface of the backup ring, and the upper surface of the bottom adapter, with respect to the central bisector it formed a substantially triangular Te symmetrical high-pressure seal according to claim 1 10, characterized in. The inclination angle of the upper surface of the packing member, the inclination angle of the upper surface of the backup ring, and the inclination angle of the upper surface of the bottom adapter are formed at 57.5 degrees with respect to the central bisector, and claim 1-11 packing storage recess provided on the lower surface of the top adapter, and the packing housing portion is provided on the lower surface of the backup ring, characterized in that formed at 60 degrees from the center bisector The high pressure sealing device according to any one of the above. The packing storage recess provided on the upper and lower surfaces of the packing member and the lower surface of the top adapter is inclined at an angle of 60 degrees with respect to the central bisector, and the upper and lower surfaces of the backup ring. adapter upper surface, a high pressure sealing apparatus according to any one of claims 1-1 2, characterized in that formed in the 57.5 degrees with respect to the center bisector.

Images