CN105020397A - Contact type mechanical seal stationary ring assembly and assembling method - Google Patents

Abstract

The invention provides a static ring assembly of a contact mechanical seal and an assembly method. The static ring assembly includes a static ring body and an end cover located at the rear end of the static ring body. The front end face of the static ring body is a sealing end face. The static ring body is provided with at least one cavity with an open rear end, the end cap is used to seal the cavity, and capillary core material and condensing agent are arranged in the cavity. In the high temperature area near the sealing end surface, the condensing agent absorbs heat during the gasification process, which reduces the temperature in the cavity near the sealing end surface, thereby reducing the temperature of the sealing end surface; in the low temperature area, the condensing agent is condensed into a liquid process medium heat. In this way, according to the heat pipe principle, a cycle of phase change of the condensing agent from liquid state to gaseous state and then to liquid state is formed by using the temperature difference in the cavity, which realizes the rapid removal of a large amount of heat at the sealing end face and reduces the sealing end face. The thermal stress and thermal deformation can improve the stability of the seal and prolong its service life.

Description

A contact type mechanical seal static ring assembly and assembly method

technical field

The invention belongs to the technical field of mechanical seals, and specifically relates to a static ring assembly of a contact mechanical seal suitable for special working conditions (such as high pressure, high speed, high temperature, large shaft diameter, etc.) and an assembly method of the static ring assembly .

Background technique

Mechanical seals are widely used in petroleum, chemical, aviation and other fields, and are mainly used for shaft end seals of centrifugal pumps in these fields. Mechanical seals can generally be divided into two types: non-contact and contact seals. In recent years, the non-contact mechanical seal has developed rapidly, but because the sealing end face is non-contact, resulting in relatively large leakage, so some occasions with high requirements still need to use the contact mechanical seal, and the application of the contact mechanical seal The range is wide.

Contact mechanical seals used for special working conditions (such as high pressure, high speed, high temperature, large shaft diameter, etc.). The temperature rise will generate a large thermal stress, which will easily cause thermal deformation of the sealing end face, and even radial cracks on the sealing end face and material bonding transfer, resulting in increased wear and leakage; the dynamic and static ring sealing end faces are in mixed friction State, there is a small amount of fluid between the sealing end faces, which is prone to vaporization at high temperature, sometimes accompanied by a loud steaming sound, and may cause the sealing ring to break; in addition, the excessive heat generated between the sealing end faces may easily cause O-shaped rubber Ring hardened and cracked. The above problems are likely to cause seal failure and reduce the life of the seal.

Most of the heat generated by the friction between the sealing end faces of the dynamic and static rings is transferred to the dynamic and static rings through heat conduction. Fast; and cooperate with the flushing liquid to flush the outer wall surface of the dynamic and static rings to achieve a cooling effect.

Contents of the invention

The invention provides a contact-type mechanical seal static ring assembly, which uses the heat pipe principle to improve the heat transfer efficiency of the static ring, effectively reduce the temperature of the sealing end face, reduce the thermal stress and thermal deformation of the sealing end face, and improve the stability of the seal to prolong the life of the seal. Seal life.

In order to achieve the above-mentioned technical purpose, the present invention adopts the following technical solutions to realize:

A static ring assembly of a contact mechanical seal, comprising a static ring body and an end cap located at the rear end of the static ring body, the front end face of the static ring body is a sealing end face, and at least one rear end is arranged on the static ring body A cavity with an open end, the end cover is used to seal the cavity, and capillary core material and condensing agent are arranged in the cavity.

When the static ring assembly is working, a large amount of frictional heat is generated at the sealing end surface; the condensing agent near the sealing end surface at the front end of the cavity absorbs heat and is vaporized into a gaseous state, so that the When the air pressure increases, the gaseous condensing agent flows to the area with low air pressure in the cavity, and is condensed into a liquid state and adheres to the capillary core material, and then the capillary core material releases the liquid state condensing agent Delivery to the front end of the cavity.

Further, the end cover is provided with an annular notch matching the rear end surface of the stationary ring body, and the notch is wound with epoxy resin or sprayed with nickel-based alloy.

Further, a plurality of sector-shaped cavities are evenly distributed in the circumferential direction of the stationary ring body.

Further, an injection hole communicating with the cavity is opened on the stationary ring body, and the condensing agent is injected through the injection hole.

Further, the static ring body is provided with a plug for sealing the injection hole.

Further, the distance between the front end surface of the cavity and the sealing end surface is 0.8-1.2mm.

Further, the capillary core material is arranged on the front end face and the outer diameter face of the cavity, and the capillary core material arranged on the front end face and the outer diameter face is continuous.

Further, the capillary core material is nylon fiber or nylon fiber.

Further, the end cover is installed on the rear end surface of the static ring body by welding or interference fit.

Further, during the manufacturing process of the static ring assembly, vacuumize the cavity so that the pressure in the cavity corresponds to a boiling point of the condensing agent that is lower than that of the static ring assembly under normal working conditions. Between the highest temperature and the lowest temperature in the cavity.

Further, the outer side of the static ring body includes a boss adjacent to the sealing end surface and a fixing platform for fixing; when the static ring assembly is working, the flushing liquid flow used to reduce the temperature of the sealing end surface Through the outer surface of the boss; the outer surface of the boss is provided with several grooves.

Further, the distance between the centers of two adjacent grooves is 0.8-1.1 mm.

Further, the distance between the center of the groove close to the sealing end surface and the sealing end surface is 1-2 mm.

Further, a plurality of spherical grooves of equal size and offset distribution are provided on the outer surface of the boss.

Further, the ratio of the depth to the diameter of the spherical groove is 0.12-0.15. The depth of the spherical groove is 0.12-0.15mm.

Further, the diameter of the spherical groove is 0.8-1.1 mm.

Further, annular grooves are arranged at intervals on the outer surface of the boss.

Further, a plurality of triangular-shaped grooves of equal size and offset distribution are provided on the outer surface of the boss.

Based on the above contact mechanical seal static ring assembly, the present invention also provides an assembly method of the above contact mechanical seal static ring assembly, which includes the following steps:

A. Install the capillary core material into the cavity of the static ring body, and the capillary core material fits the front end surface and the outer diameter surface of the cavity;

B. Wrap epoxy-based resin or spray nickel-based alloy on the front end surface of the end cover and the static ring body, and seal and fix the end cover to the static ring body;

C. Inject cooling liquid into the cavity through the injection hole, and then vacuumize the cavity so that the pressure in the cavity corresponds to the boiling point of the condensing agent between the normal operation of the static ring assembly Between the highest temperature and the lowest temperature in the cavity under the state; finally, the injection hole is closed to complete the assembly.

In the static ring assembly of a contact mechanical seal provided by the present invention, at least one cavity with an open rear end is provided on the static ring body, and capillary core material and liquid condensing agent are arranged in the cavity; when When the static ring assembly is in the working state, the static ring and the moving ring cooperate to play a sealing role, and the friction at the sealing end face of the static ring generates a large amount of friction heat, that is, the temperature of the sealing end face is the highest, and it passes through the body of the static ring outwards and backwards. The heat is transferred, so the temperature in the cavity is the highest near the sealing end surface; the front end of the cavity is close to the sealing end surface, that is, the temperature at the front end of the cavity is relatively high, so that the condensing agent absorbs heat and is vaporized into a gaseous state, and then the front end of the cavity When the air pressure increases, the gaseous condensing agent flows to the area with low air pressure in the cavity, so that the condensing agent is condensed into a liquid state and adheres to the capillary core material, and then the capillary core material converts the liquid state The condensing agent is delivered to the front end of the cavity. In the high temperature zone near the sealing end surface, the condensing agent absorbs heat during the gasification process, which reduces the temperature in the cavity near the sealing end surface, thereby reducing the temperature of the sealing end surface; in the low temperature zone, the condensing agent is condensed into a liquid process medium heat. In this way, according to the heat pipe principle, a cycle of phase change of the condensing agent from liquid state to gaseous state and then to liquid state is formed by using the temperature difference in the cavity, which realizes the rapid removal of a large amount of heat at the sealing end face and reduces the sealing end face. The thermal stress and thermal deformation can improve the stability of the seal and prolong its service life.

Other characteristics and advantages of the present invention will become clearer after reading the detailed description of the present invention in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the structure schematic diagram of the first embodiment of the static ring assembly of the contact mechanical seal proposed by the present invention;

Fig. 2 is a schematic diagram of a cross-sectional structure along A-A in Fig. 1;

Fig. 3 is a schematic diagram of a cross-sectional structure along B-B in Fig. 2;

Fig. 4 is the structural representation of end cap in Fig. 3;

Fig. 5 is a schematic structural view of the static ring body in Fig. 3;

Fig. 6 is a right view structural diagram of Fig. 5;

Fig. 7 is a schematic structural view of the static ring body of the second embodiment of the contact mechanical seal static ring assembly proposed by the present invention;

Fig. 8 is a schematic diagram of the cross-sectional structure of C-C in Fig. 7;

FIG. 9 is a schematic structural view of the static ring body of the third embodiment of the contact mechanical seal static ring assembly proposed by the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the definition terms: the direction close to the axis of the static ring body is "inner", the direction away from the axis of the static ring body is "outside", and the direction close to the sealing end face is "Front", with the direction away from the sealing end face as "rear", the terms are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation , and therefore cannot be construed as a limitation of the present invention.

Referring to Fig. 1-Fig. 6, it is the first embodiment of the static ring assembly of the contact mechanical seal proposed by the present invention. A static ring assembly of the contact mechanical seal includes the static ring body 1 and the static ring body 1. The end cover 2 at the end, wherein the front end face of the static ring body 1 is a sealing end face 11, at least one cavity 12 with an open rear end is provided on the static ring body 1, and the end cover 2 is used to seal the opening of the rear end of the cavity 12 , the capillary core material 3 and the condensing agent are arranged in the cavity 12 .

In this embodiment, at least one cavity 12 with an open rear end is provided on the static ring body 1, and a capillary core material 3 and a liquid condensing agent are arranged in the cavity; when the static ring assembly is in working condition, The static ring and the moving ring cooperate to play a sealing role. The friction of the sealing end face 11 of the static ring generates a large amount of friction heat, that is, the temperature of the sealing end face is the highest, and the heat is transferred outward and backward through the static ring body 1, so the cavity 12 The temperature near the sealing end surface 11 is the highest; the front end of the cavity 12 is close to the sealing end surface 11, that is, the temperature at the front end of the cavity 12 is relatively high, so that the condensing agent absorbs heat and is vaporized into a gaseous state, and then the air pressure at the front end of the cavity 12 increases. At this time, the gaseous condensing agent flows to the area with low air pressure in the cavity 12, so that the condensing agent is condensed into a liquid state and adheres to the capillary material 3, and then the capillary material 3 transports the liquid condensing agent to the front end of the cavity 12 . In this way, the condensing agent in the high temperature area near the sealing end face 11 absorbs heat during the gasification process, which reduces the temperature in the cavity 12 near the sealing end face 11, thereby reducing the temperature of the sealing end face 11; in the low temperature area, the condensing agent is condensed into Exothermic in liquid state. In this way, according to the principle of the heat pipe, the temperature difference in the cavity 12 is used to form a phase change cycle of the condensing agent from liquid state to gaseous state and then to liquid state, so that a large amount of heat at the sealing end surface 11 can be quickly taken away, reducing The thermal stress and thermal deformation of the sealing end surface 11 are small, and the stability of the sealing is improved to prolong the service life.

Of course, during the working process of the static ring assembly, the coolant flows through the outside of the static ring body 1 to cool down the sealing end surface 11, so it is close to the outside of the static ring body 1 in the cavity 12, that is, the cavity 12 The temperature at the outer diameter side is lower, and the temperature at the rear of the cavity 12 is lower, that is, the outer diameter side of the cavity 12 and the rear of the cavity 12 are low temperature regions. That is, the condensing agent is vaporized at the front end of the cavity 12 and condensed into liquid at the outer diameter side of the cavity 12 or the rear of the cavity 12 .

In this embodiment, as shown in FIGS. 2 and 3 , the opening at the rear end of the cavity 12 is such that the capillary material 3 is disposed inside the cavity 2 , and the end cap 2 is used to seal the opening at the rear end of the cavity 12 . The end cover 2 is installed on the rear end surface of the static ring body 1 by welding or interference fit.

In this embodiment, as shown in FIG. 3 , a capillary core material 3 is provided on the front end surface and the outer diameter surface of the cavity 12, and the capillary core material 3 disposed between the front end surface and the outer diameter surface is continuous. The capillary core material 3 can be a porous material, preferably nylon fiber or nylon fiber; the capillary core material 3 is mainly used to transport the condensing agent, and is also used for the attachment of the liquid condensing agent; by being arranged on the front end surface and the outer diameter surface The wick material 3 between them is continuous, or the wick material 3 on the front end surface and the outer diameter surface is continuous, that is, the wick material 3 can transport the liquid condensate from the outer diameter surface to the front end surface place. The capillary core material 3 can be in the form of a sheet, which is attached to the front surface and the outer diameter surface of the cavity 12; after the capillary core material 3 is installed, there is still a large space in the cavity 12 for the flow of the gaseous condensing agent.

Referring to Fig. 4, in order to further improve the sealing between the end cover 2 and the static ring body 1, an annular notch 21 matching the rear end surface of the static ring body 1 is provided on the end cover 2, and the notch 21 is provided at the end The outer side of the cover 2 is wrapped with epoxy resin or nickel-based alloy sprayed on the notch 21 to improve the sealing between the end cover 2 and the static ring body 1 .

In this embodiment, as shown in Fig. 5 and Fig. 6, there are three fan-shaped cavities 12 evenly distributed in the circumferential direction of the static ring body 1, and the distance d between the front end surface of the cavity 12 and the sealing end surface 11 is set as 0.8-1.2mm, so that the heat transfer between the sealing end surface 11 and the cavity 12 is faster, which helps to dissipate the heat at the sealing end surface 11 and reduce the temperature of the sealing end surface 11 .

In order to inject the condensing agent into the cavity 12, an injection hole 13 communicating with the cavity 12 is provided on the static ring body 1, and the condensing agent is injected through the injection hole 13; for the injection amount of the condensing agent, the capillary core material 3 Just soak it, usually inject 1~2ml. A plug 4 for sealing the injection hole 13 is arranged on the static ring body 1 .

For the condensing agent, you can choose ordinary fluid as the condensing fluid, and in order to reduce the cost, you can choose water as the condensing agent.

In the manufacturing process of the static ring assembly, vacuumize the inside of the cavity 12, because the boiling point of the condensing agent is low under the condition of low air pressure; As the temperature becomes lower, the refrigerant becomes gaseous and absorbs heat, reducing the temperature at the front end of the cavity 12, so that the temperature in the cavity 12 is kept lower than the boiling point of the condensing agent, so that the heat transfer at the sealing end surface 11 is accelerated, and the sealing end surface can be effectively reduced. 11 temp. However, the pressure in the cavity 12 should not be too low, otherwise the condensing agent is always in a gaseous state and cannot be liquefied. Therefore, the boiling point of the condensing agent corresponding to the pressure in the cavity 12 is set to be within the cavity 12 under the normal working state of the stationary ring assembly. between the highest temperature and the lowest temperature.

Referring to Figure 1 and Figure 5, in order to install and fix the static ring assembly, the outside of the static ring body 1 includes a boss 15 close to the sealing end surface 11 and a fixing table 14 for fixing; when the static ring assembly is working , rinse, cool down and clean with flushing fluid, and the flushing fluid flows through the outer surface of the boss platform to lower the temperature; in order to increase the contact area between the boss platform 15 and the flushing fluid and increase the cooling effect, the Several grooves 151 are opened on the top. In this way, the contact area between the outer surface of the boss 15 and the flushing liquid increases the cooling effect, and then the temperature of the outer diameter surface of the cavity 12 close to the outer surface of the boss 15 is reduced, so that the gaseous condensation in the cavity 12 The condensate is condensed into a liquid on the outer diameter side of the cavity 12, which further enhances the phase change of the condensate, increases the speed of heat transfer and loss, and quickly reduces the temperature at the sealing end surface 11.

The front part of the outer diameter side of the cavity 12 is flushed with the flushing liquid on the outer surface of the bearing platform of the static ring body 1, so that the temperature of the front part of the outer diameter surface of the cavity 12 is quickly dissipated, while the temperature of the outer diameter surface of the cavity 12 The rear part is far away from the sealing end face, and the heat generated by the sealing end face 11 is less transferred to the past, so the temperature is not high; mainly to condense the gaseous condensing agent into a liquid state

In some embodiments of the present invention, as shown in FIG. 1 and FIG. 5 , in order to monitor the temperature of the sealing end face 11 and avoid seal failure caused by excessive temperature, an axial temperature measuring device is provided on the static ring body 1 Hole 16, the diameter of the temperature measuring hole 16 is 1 to 2 mm, the temperature measuring hole 16 extends from the rear end face opening of the static ring body to the sealing end face in the axial direction, so that the front end face of the temperature measuring hole 16 is close to the sealing end face 11; the temperature measuring hole A thermocouple is installed in 16 for measuring the temperature at the front end of the temperature measuring hole 16, which can reflect the temperature of the sealing end face 11. A coaxial hole 22 communicating with the temperature measuring hole 16 is also provided on the end cover 2, so that after the static ring assembly is assembled, a thermocouple is installed from the rear end face of the end cover 2, so that the thermocouple communicates with the outside world through the hole 22. Connected, it is convenient for the cable arrangement of the power line and the signal line of the thermocouple, and it is convenient for the maintenance and replacement of the thermocouple.

In some embodiments of the present invention, as shown in FIG. 1 , for the spacing setting of the adjacent grooves 151 on the outer surface of the boss 15, too close will reduce the strength of the static ring body 1, and too far can not be further adjusted. Improve the cooling effect; multiple tests have shown that setting the distance between the centers of two adjacent grooves at 0.8-1.1 mm can not only ensure the strength of the static ring body 1 but also achieve a better cooling effect. And the distance between the center of the groove 151 close to the sealing end surface 11 and the sealing end surface 11 is set to be 1-2 mm.

Referring to Fig. 1, in the present embodiment, a plurality of spherical grooves 151 of equal size and dislocation distribution are provided on the outer surface of the boss 151; The contact area with the flushing liquid increases the cooling effect, and makes the groove 151 less prone to stress concentration, and does not significantly reduce the strength of the outer side of the boss 15 .

The distance between the centers of two adjacent grooves 151 is set to be 0.8-1.1 mm, the depth of the spherical grooves is 0.12-0.15 mm, and the diameter of the spherical grooves is 0.8-1.1 mm.

Referring to Figure 1-Figure 6, the assembly method of the static ring assembly of the contact mechanical seal in this embodiment is illustrated, including the following steps:

A. Install the capillary core material 3 into the cavity 12 of the static ring body 1, so that the capillary core material 3 fits the front end surface and the outer diameter surface of the cavity 12, and ensures the capillary core between the front end surface and the outer diameter surface Material 3 is continuous. In this step, the capillary core material 3 is installed on the front end surface and the outer diameter surface of the cavity 12. The front end of the cavity 12 is close to the sealing end surface, and the temperature is relatively high. The temperature at the place, that is, the heat transferred from the sealing end face is rapidly reduced. The front part of the outer diameter side of the cavity 12 is flushed with the flushing liquid on the outer surface of the bearing platform of the static ring body 1, so that the temperature of the front part of the outer diameter surface of the cavity 12 is quickly dissipated, while the temperature of the outer diameter surface of the cavity 12 The rear part is far away from the sealing end surface, and less heat generated by the sealing end surface 11 is transferred there, so the temperature is not high; the outer diameter side of the cavity 12 condenses the gaseous condensing agent into a liquid state. The capillary material 3 provides adhesion for the condensation of the gaseous condensing agent, which helps to accelerate the speed of condensation; due to the evaporation of the condensing agent attached to the capillary material 3 at the front end of the cavity 12, the capillary material 3 will be in the cavity. The condensate condensed on the outer diameter side of 12 is transported forward.

B. Wind the epoxy-based resin or spray nickel-based alloy on the front end surface of the end cover 2 and the static ring body 1, and seal and fix the end cover 2 to the static ring body 1; in this step, place The end cover 2 is sealed and fixed to the static ring body 1, so that the opening at the rear end of the cavity 12 is sealed.

C. Inject the coolant into the cavity 12 through the injection hole 13, and then vacuumize the cavity 12, so that the boiling point of the condensing agent corresponding to the pressure in the cavity 12 is between the normal working state of the static ring assembly, and the cavity Between the highest temperature and the lowest temperature in 12; Finally, the injection hole 13 is closed with a plug 4 to complete the assembly.

Referring to Fig. 7 and Fig. 8, it is the second embodiment of the contact mechanical seal static ring assembly proposed by the present invention. The main difference from the first embodiment is: the The shapes of the grooves are different, and the number of cavities 12 is four; other structures can adopt the same structure as that of the first embodiment.

In this embodiment, annular grooves 152 are arranged at intervals on the outer surface of the boss 15, guided by the annular grooves 152, the flushing liquid can flow down through the annular grooves 152 through a larger circumferential area, or Said that the angle corresponding to the outer surface of the flow through the boss increases, increasing the cooling effect.

Set the distance between the centers of two adjacent annular grooves 152 to be 0.8-1.1 mm, and the distance between the center of the annular groove 152 close to the sealing end face 11 and the sealing end face 11 to be 1-2 mm; The depth range is 0.5~0.8mm, and the width range is 0.4~0.6mm.

In this embodiment, four fan-shaped cavities 12 are evenly distributed in the circumferential direction of the static ring body 1, and the rear ends of the cavities 12 are open. The four cavities 12 are connected to the injection holes 13 .

Referring to Fig. 9, it is the third embodiment of the static ring assembly of the contact mechanical seal proposed by the present invention. The main difference from the first embodiment is: Different shapes, other structures can adopt the same structure as the first embodiment.

In this embodiment, a plurality of triangular grooves 153 of equal size and offset distribution are provided on the outer surface of the boss 15, and the grooves 153 are equiangular triangles.

The distance between the centers of two adjacent triangular grooves 153 is set to be 0.8-1.1 mm, the depth of the triangular grooves 153 is 0.5-0.8 mm, and the side length is 0.8-1.1 mm.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention to other forms. Any skilled person who is familiar with this profession may use the technical content disclosed above to change or modify the equivalent of equivalent changes. Example. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims (10)

1. a contacting mechanical seal stationary ring assembly, it is characterized in that, comprise stationary ring body and the end cap being positioned at described stationary ring body rear end, the front-end face of described stationary ring body is seal face, described stationary ring body is at least provided with the cavity of an open rearward end, described end cap, for sealing described cavity, is provided with capillary core material and condensing agent in described cavity.

2. stationary ring assembly according to claim 1, is characterized in that, when described stationary ring assembly work, described seal face place produces a large amount of frictional heats; Described cavity front end is vaporizated into gaseous state near the described condensing agent heat absorption of described seal face, the air pressure of described cavity front end is increased, now the described condensing agent of gaseous state flows to the region that described cavity internal air pressure is low and is condensed into liquid state and is attached on described capillary core material, and the front end of the described condensing agent of liquid state to described cavity is carried by described capillary core material afterwards.

3. stationary ring assembly according to claim 1, is characterized in that, described end cap offers the annular notches matched with the ear end face of described stationary ring body, described notch is wound with epoxy or is coated with nickel-base alloy.

4. stationary ring assembly according to claim 1, is characterized in that, the circumferencial direction of described stationary ring body is evenly equipped with the described cavity of multiple fan annular.

5. the stationary ring assembly according to any one of Claims 1-4, is characterized in that, described stationary ring body offers the hand-hole be connected with described cavity, described condensing agent is injected by described hand-hole.

6. the stationary ring assembly according to any one of Claims 1-4, is characterized in that, the front-end face and outer diameter face of described cavity arrange described capillary core material, and the capillary core material be arranged between front-end face and outer diameter face is continuous print.

7. the stationary ring assembly according to any one of Claims 1-4, it is characterized in that, in described stationary ring assembly manufacture process, vacuumize process in described cavity, make between the maximum temperature of the boiling point of the condensing agent corresponding to the pressure in described cavity under described stationary ring assembly normal working in described cavity and minimum temperature.

8. the stationary ring assembly according to any one of Claims 1-4, is characterized in that, the outside of described stationary ring body comprise near described seal face hold boss and for fixing stationary platen; When the work of described stationary ring assembly, described in flowing through for reducing the washing solution of described seal face temperature, hold the outer side surface of boss; The described outer side surface holding boss offers some grooves.

9. stationary ring assembly according to claim 8, is characterized in that, the distance between two adjacent described groove center is 0.8 ~ 1.1mm, and the distance of pressing close between the center of the described groove of described seal face and described seal face is 1 ~ 2mm.

10. an assembly method for contacting mechanical seal stationary ring assembly according to claim 5, comprises the steps:

A, be installed to by described capillary core material in the cavity of described stationary ring body, described capillary core material is fitted the front-end face of described cavity and outer diameter face;

B, be wound around epoxy by the front-end face of described end cap with the position of described stationary ring body gluing, sealing or spray nickel-base alloy, and described end bracket enclosed being fixed on described stationary ring body;

C, cooling liquid is injected in described cavity by described hand-hole, afterwards described cavity is vacuumized process, make between the maximum temperature of the boiling point of the condensing agent corresponding to the pressure in described cavity under described stationary ring assembly normal working in described cavity and minimum temperature; Finally described hand-hole is closed, complete assembling.