CN114321372A - High-temperature high-pressure mechanical sealing device for composite power groove and using method thereof - Google Patents
High-temperature high-pressure mechanical sealing device for composite power groove and using method thereof Download PDFInfo
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- CN114321372A CN114321372A CN202011066523.8A CN202011066523A CN114321372A CN 114321372 A CN114321372 A CN 114321372A CN 202011066523 A CN202011066523 A CN 202011066523A CN 114321372 A CN114321372 A CN 114321372A
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Abstract
The invention relates to the field of fluid medium conveying pipeline sealing devices, in particular to a high-temperature high-pressure mechanical sealing device for a composite power groove and a using method thereof. The utility model provides a compound power groove high temperature high pressure mechanical seal device, includes pivot (1) and axle sleeve (2), characterized by: the cooling device is characterized by further comprising a movable ring (31), a stationary ring (32), a stationary ring seat (33), a gland (41), an inner gland (42), a cooler (5), a throttling ring (6), a spring (7) and a cover plate (8), wherein the movable ring (31) is sleeved outside the shaft sleeve (2) through a through hole in the middle, the stationary ring (32) and the like are all rotatably sleeved outside the shaft sleeve (2) in sequence through respective through holes in the middle, and the medium side end face of the stationary ring (32) is abutted against the atmosphere side end face of the movable ring (31) and keeps fit. A use method of a high-temperature high-pressure mechanical sealing device of a composite power groove is characterized by comprising the following steps: the method is implemented in sequence according to the following steps: rotating; and (5) sealing. The invention has good sealing performance, long service life and strong environmental adaptability.
Description
Technical Field
The invention relates to the field of fluid medium conveying pipeline sealing devices, in particular to a high-temperature high-pressure mechanical sealing device for a composite power groove and a using method thereof.
Background
With the development of the industry in China, the performance of high-end process equipment is improved quickly. Mechanical seals, which are key components of these devices, also face more stringent challenges. For example, the mechanical seal with high temperature, high pressure and high speed is increasingly required, and the parameters are also increasingly high.
The technology that present contact mechanical seal adopted in the terminal surface technique is more single, often offers the deep trouth for the terminal surface outside, has the cooling effect to the mechanical seal terminal surface during the in-service use, but in the face of higher pressure and temperature operating mode, can't satisfy the requirement.
At present, the mechanical seal cooling usually adopts a traditional cooling backpack mode, water in a seal cavity is introduced into a cooler, and the cooling effect of the mechanical seal cavity is realized through heat exchange with external cooling water. Mechanical seal coolers are typically in the form of coils or tubes.
Under high temperature high pressure operating mode, the high-speed friction of mechanical seal quiet ring terminal surface can produce a large amount of heats, and traditional mechanical seal structure has the dead angle near the terminal surface, and the cooling water reduces at this regional velocity of flow, causes heat exchange efficiency not enough, and the heat is gathered, and the foreign particles in the medium can gather in this region simultaneously, and the wearing and tearing terminal surface causes bigger generating heat. Eventually, the end face itself and the liquid film in its gap are severely damaged, leading to failure of the mechanical seal and even fracturing of the seal ring to form a large media leak. Seriously affecting the safety and stability of production.
Disclosure of Invention
The invention discloses a high-temperature and high-pressure mechanical sealing device of a composite power groove and a using method thereof, aiming at overcoming the defects of the prior art and providing a rotating shaft sealing device with good sealing performance, long service life and strong environmental adaptability.
The invention achieves the purpose by the following technical scheme:
the utility model provides a compound power groove high temperature high pressure mechanical seal device, including pivot and axle sleeve, the axle sleeve is established on the lateral surface of pivot through the through-hole cover at middle part, the middle part of axle sleeve lateral wall is equipped with the boss, move the ring cover and be one end open-ended cylindric, be equipped with the through-hole on the bottom plate of moving the ring cover, move the ring cover and establish on the axle sleeve through the through-hole cover of bottom plate, it is fixed with the screw connection for a terminal surface of bottom plate and the boss of moving the ring cover, it has O shape sealing washer, characterized by to line up between the medial surface of moving the ring cover lateral wall and the lateral wall of boss: also comprises a movable ring, a static ring seat, a gland, an inner gland, a cooler, a throttling ring, a spring and a cover plate,
the movable ring is hooped outside the shaft sleeve through a through hole in the middle and embedded in an annular space formed by the shaft sleeve, the boss and the movable ring sleeve, an O-shaped sealing ring is lined between the outer side face of the movable ring and the inner side face of the side wall of the movable ring sleeve, a movable ring sleeve groove is arranged on the end face of the movable ring sleeve close to the friction pair side, so that sealing medium fluid forms turbulent flow when flowing near the end face of the movable ring sleeve close to the friction pair side, at least three power grooves with arc-shaped sections are averagely arranged on the outer edge of the atmosphere side end face of the movable ring around the central axis of the movable ring, at least three non-rotation power grooves with arc-shaped sections are averagely arranged on the atmosphere side end face of the movable ring around the central axis of the movable ring, the circumference of each non-rotation power groove is concentric with the outer side face of the movable ring and is arranged inside the outer side face of the movable ring, and each non-rotation power groove is arranged in a staggered mode along the radial direction;
the static ring, the static ring seat and the gland are all rotatably sleeved outside the shaft sleeve in sequence through holes in the middle parts of the static ring, the static ring seat and the gland, an inner step is arranged in the through hole of the gland, an outer step matched with the inner step of the gland is arranged on the outer side surface of the static ring seat, the outer step of the static ring seat is sleeved in the inner step of the gland, the outer step of the static ring seat and the inner step of the gland are fixedly connected through screws, an O-shaped sealing ring is lined between the outer step of the static ring seat and the inner step of the gland, a static ring hole is arranged on the medium side end surface of the static ring seat, a static ring hole hoop of the static ring seat is arranged outside the static ring, and the medium side end surface of the static ring props against the atmosphere side end surface of the movable ring;
the inner gland is also rotatably sleeved outside the shaft sleeve through a through hole in the middle part, a cooling water inlet and outlet hole is arranged on the excircle of the inner gland, a throttling hole is arranged on the inner circle of the inner gland close to the end face of the medium side, the end face of the atmosphere side of the inner gland props against the end face of the medium side of the gland, an O-shaped sealing ring is lined between the end face of the atmosphere side of the inner gland and the end face of the medium side of the gland, the cooler is rotatably sleeved outside the shaft sleeve through the through hole in the middle part and is fixedly connected with the inner gland, a closed cooling chamber is formed by the two, the cooling water inlet and outlet holes of the inner gland respectively correspond to a flow passage inlet and outlet of the cooler, guide plates which are arranged in a staggered mode are arranged in the cooler to increase the heat exchange area, a labyrinth groove is arranged on the inner circle of the throttling ring, a spring is arranged between the throttling ring and the cooler, two ends of the spring respectively prop against the end face of the atmosphere side of the throttling ring and the end face of the medium side of the cooler, and the cover plate is rotatably sleeved outside the shaft sleeve through the through hole in the middle part, the cover plate covers the medium side end face of the throttling ring and the medium side end face of the inner gland respectively, and the cover plate and the medium side end face of the inner gland are fixedly connected through screws.
The high-temperature high-pressure mechanical sealing device of the composite power groove is characterized in that: the movable ring sleeve grooves are divided into at least one circle, the movable ring sleeve grooves of each circle are arranged on a circumference concentric with the side end face of the movable ring sleeve close to the friction pair, and the movable ring sleeve grooves of two adjacent circles are arranged in a staggered mode along the radial direction of the movable ring sleeve close to the side end face of the friction pair;
the depth of the dynamic groove is 0.5 mm-2 mm, and the depth of the non-rotation dynamic groove is 1 μm-10 μm.
The application method of the composite power groove high-temperature high-pressure mechanical sealing device is characterized in that: the method is implemented in sequence according to the following steps:
rotating: the rotating shaft rotates to drive the shaft sleeve, the boss and the rotating ring to synchronously rotate, the shaft sleeve, the boss and the rotating ring keep relatively static with the rotating shaft at the moment, the static ring seat, the gland, the inner gland, the cooler, the throttling ring and the cover plate do not rotate along with the rotating shaft, and the static ring, the static ring seat, the gland, the inner gland, the cooler, the throttling ring and the cover plate all keep relatively rotating with the rotating shaft at the moment;
sealing: the sealing medium fluid flows in the through hole of the gland, forms turbulent flow when flowing to the inner end surface of the movable ring sleeve, permeates into the space between the inner end surface of the static ring and the inner end surface of the movable ring to form a sealing liquid film, flows into the through hole of the inner gland and flows into the cooler, and is guided by the guide plate, and is cooled in a labyrinth groove formed by the guide plate.
The invention has the following beneficial effects:
1. the operation condition of the mechanical seal is greatly improved. Turbulent flow is generated near the end face of the movable ring sleeve, so that the heat exchange efficiency of the area is greatly improved, the heat dissipation requirement caused by high temperature and high pressure is effectively met, meanwhile, the gathering of nearby gas and impurities is successfully eliminated, and the end face abrasion is avoided.
2. The heat generated near the contact end surfaces of the static ring and the dynamic ring can be quickly taken away, and meanwhile, a liquid film with enough rigidity can be generated between the contact end surfaces, so that the high-pressure working condition is adapted.
3. The cooler can be with effectively keeping apart by fluid conveying equipment casing and medium conduction's heat, combines to increase heat transfer area 2 to 3 times under the unchangeable condition of occupation space with the labyrinth structure combination of interior circle survey simultaneously, has strengthened heat transfer performance greatly, effectively blocks again that the hot-fluid from getting into the seal chamber.
4. The blocker ring blocks the media side superheated fluid from entering the seal cavity.
Drawings
Figure 1 is a cross-sectional view of the present invention,
figure 2 is an enlarged partial schematic view of portion a of figure 1,
fig. 3 is a partially enlarged schematic view of a portion B in fig. 1.
Detailed Description
The invention is further illustrated by the following specific examples.
Example 1
A high-temperature and high-pressure mechanical sealing device for a composite power groove comprises a rotating shaft 1, a shaft sleeve 2, a moving ring 31, a static ring 32, a static ring seat 33, a gland 41, an inner gland 42, a cooler 5, a throttling ring 6, a spring 7 and a cover plate 8, and has the specific structure as shown in figures 1-3:
the shaft sleeve 2 is hooped on the outer side surface of the rotating shaft 1 through a through hole in the middle, the boss 21 is arranged in the middle of the outer side wall of the shaft sleeve 2, the movable ring sleeve 22 is in a cylindrical shape with one open end, a through hole is formed in a bottom plate of the movable ring sleeve 22, the movable ring sleeve 22 is sleeved on the shaft sleeve 2 through the through hole of the bottom plate, the bottom plate of the movable ring sleeve 22 and one end surface of the boss 21 are fixedly connected through a screw, and an O-shaped sealing ring is lined between the inner side surface of the side wall of the movable ring sleeve 22 and the outer side wall of the boss 21;
the rotating ring 31 is hooped outside the shaft sleeve 2 through a through hole in the middle, the rotating ring 31 is embedded in an annular space formed by the shaft sleeve 2, the boss 21 and the rotating ring sleeve 22, and an O-shaped sealing ring is lined between the outer side surface of the rotating ring 31 and the inner side surface of the side wall of the rotating ring sleeve 22, as shown in fig. 2: the inner end surface of the movable ring sleeve 22 is provided with a movable ring sleeve groove 221, so that the sealing medium fluid forms turbulent flow when flowing near the inner end surface of the movable ring sleeve 221, as shown in fig. 3: the outer edge of the inner end face of the rotating ring 31 is averagely provided with at least three rotating ring grooves 311 with arc sections around the central axis of the rotating ring 31, the inner end face of the rotating ring 31 is also averagely provided with at least three non-rotating power grooves 312 with arc sections around the central axis of the rotating ring 31, the circumference of each non-rotating power groove 312 and the outer side face of the rotating ring 31 are concentric and are arranged inside the outer side face of the rotating ring, and each non-rotating power groove 312 and one rotating ring groove 311 are arranged in a staggered mode along the radial direction;
the static ring 32, the static ring seat 33 and the gland 41 are all rotatably sleeved outside the shaft sleeve 2 in sequence through holes in the respective middle parts, an inner step is arranged in the through hole of the gland 41, an outer step matched with the inner step of the gland 41 is arranged on the outer side surface of the static ring seat 33, the outer step of the static ring seat 33 is sleeved in the inner step of the gland 41, the outer step of the static ring seat 33 and the inner step of the gland 41 are fixedly connected through screws, an O-shaped sealing ring is lined between the outer step of the static ring seat 33 and the inner step of the gland 41, a static ring hole is arranged on the inner end surface of the static ring seat 33, the static ring hole of the static ring seat 33 is hooped outside the static ring 32, and the inner end surface of the static ring 32 props against the inner end surface of the movable ring 31;
the inner gland 42 is also rotatably sleeved outside the shaft sleeve 2 through a through hole in the middle part, a cooling hole is arranged on the inner end surface of the inner gland 42, a throttling hole is arranged on the outer end surface of the inner gland 42, the cooling hole and the throttling hole are communicated with each other, the inner end surface of the inner gland 42 is propped against the inner end surface of the gland 41, an O-shaped sealing ring is lined between the inner end surface of the inner gland 42 and the inner end surface of the gland 41, the cooler 5 is rotatably sleeved outside the shaft sleeve 2 through the through hole in the middle part and the cooling hole of the inner gland 42 is hooped outside the cooler 5, a guide plate 51 which is arranged in a staggered mode is arranged in the cooler 5 to increase the heat exchange area, the throttling ring 6 is rotatably sleeved outside the shaft sleeve 2 through the through hole in the middle part and the throttling hole of the inner gland 42 is hooped outside the throttling ring 6, a labyrinth groove is arranged on the side wall of the through hole of the throttling ring 6, a spring 7 is arranged between the throttling ring 6 and the cooler 5, and two ends of the spring 7 are respectively propped against the inner end surface of the throttling ring 6 and the outer end surface of the cooler 5, the cover plate 8 is rotatably sleeved outside the shaft sleeve 2 through a through hole in the middle, the cover plate 8 covers the outer end face of the throttle ring 6 and the outer end face of the inner gland 42 respectively, and the cover plate 8 and the outer end face of the inner gland 42 are fixedly connected through screws.
In this embodiment: the movable ring sleeve groove 221 is divided into two circles, the movable ring sleeve groove 221 of each circle is arranged on a circumference concentric with the inner end face of the movable ring sleeve 22, and the movable ring sleeve grooves 221 of two adjacent circles are arranged in a staggered mode along the radial direction of the inner end face of the movable ring sleeve 22;
the depth of the dynamic groove 311 is 0.5 mm-2 mm, and the depth of the non-rotation dynamic groove 312 is 1 μm-10 μm.
When the method is used, the steps are implemented in sequence as follows:
rotating: the rotating shaft 1 rotates to drive the shaft sleeve 2, the boss 21 and the rotating ring 31 to synchronously rotate, at the moment, the shaft sleeve 2, the boss 21 and the rotating ring 31 all keep relative rest with the rotating shaft 1, the static ring 32, the static ring seat 33, the gland 41, the inner gland 42, the cooler 5, the throttling ring 6 and the cover plate 8 do not rotate along with the rotating shaft 1, and at the moment, the static ring 32, the static ring seat 33, the gland 41, the inner gland 42, the cooler 5, the throttling ring 6 and the cover plate 8 all keep relative rotation with the rotating shaft 1;
sealing: when the mechanical seal operates, cooling water is introduced into the cooling water inlet on the outer circle side of the inner gland 42, passes through the guide plate 51 of the cooler 5 and then flows out from the cooling water outlet. The sealed high-temperature medium fluid is mostly blocked outside the mechanical seal by the throttling ring, and part of the fluid entering the cavity of the mechanical seal is in heat exchange with cooling water on the other side of the cooler 5 when passing through a gap formed by the cooler 5 and the shaft sleeve 2, so that the temperature is remarkably reduced. The medium inside the mechanical seal flows in the through hole of the medium gland 41, turbulent flow is formed when the sealing medium fluid flows to the end face of the movable ring sleeve 22 close to the friction pair side, the sealing medium fluid penetrates between the end face of the medium side of the static ring 32 and the end face of the atmosphere side of the movable ring 31 to form a sealing liquid film, and the medium inside the mechanical seal flows out to an external heat exchanger through a medium inlet and outlet arranged on the gland (41) and returns to a sealing cavity after being cooled.
In fig. 1: a is the medium side and B is the atmosphere side.
Claims (3)
1. The utility model provides a compound power groove high temperature high pressure mechanical seal device, including pivot (1) and axle sleeve (2), axle sleeve (2) are established on the lateral surface of pivot (1) through the through-hole hoop at middle part, the middle part of axle sleeve (2) lateral wall is equipped with boss (21), move ring cover (22) be one end open-ended cylindric, be equipped with the through-hole on the bottom plate of moving ring cover (22), move ring cover (22) and establish on axle sleeve (2) through the through-hole cover of bottom plate, it is fixed with the screw connection to move the bottom plate of ring cover (22) and a terminal surface of boss (21), it has O shape sealing washer, characterized by to line in between the medial surface of moving ring cover (22) lateral wall and the lateral wall of boss (21): also comprises a movable ring (31), a static ring (32), a static ring seat (33), a gland (41), an inner gland (42), a cooler (5), a throttle ring (6), a spring (7) and a cover plate (8),
the movable ring (31) is sleeved outside the shaft sleeve (2) through a through hole in the middle part, the movable ring (31) is embedded in an annular space formed by the shaft sleeve (2), the boss (21) and the movable ring sleeve (22), an O-shaped sealing ring is lined between the outer side face of the movable ring (31) and the inner side face of the side wall of the movable ring sleeve (22), a movable ring sleeve groove (221) is arranged on the end face of the movable ring sleeve (22) close to the friction pair side, at least three movable ring grooves (311) with arc-shaped sections are averagely arranged at the outer edge of the atmosphere side end face of the movable ring (31) around the central axis of the movable ring (31), at least three non-rotation power grooves (312) with arc-shaped sections are averagely arranged on the atmosphere side end face of the movable ring (31) around the central axis of the movable ring (31), the circumference where each non-rotation power groove (312) is located and the outer side face of the movable ring (31) are concentric and are arranged inside the outer side face of the movable ring, and each non-rotation power groove (312) is arranged in a staggered mode with one movable ring groove (311) along the radial direction;
the static ring (32), the static ring seat (33) and the gland (41) are all rotatably sleeved outside the shaft sleeve (2) in sequence through holes in the middle parts of the static ring, an inner step is arranged in the through hole of the gland (41), and an outer step matched with the inner step of the gland (41) is arranged on the outer side surface of the static ring seat (33);
an outer step of the static ring seat (33) is sleeved in an inner step of the gland (41), the static ring seat (33) is sleeved in the gland (41) to ensure that the static ring seat can move in a compensating mode in the axial direction and prevent the static ring seat and the gland from rotating relative to each other by using a pin, an O-shaped sealing ring is lined between the outer step of the static ring seat (33) and the inner step of the gland (41), the inner step is arranged on the medium side end face of the static ring seat (33), the static ring (32) is embedded in the inner step of the static ring seat (33) in an interference fit mode, and the medium side end face of the static ring (32) abuts against the atmosphere side end face of the movable ring (31) and keeps attached;
the inner gland (42) is also rotatably sleeved outside the shaft sleeve (2) through a through hole in the middle, the excircle of the inner gland (42) is provided with a cooling water inlet and outlet hole, the inner circle of the inner gland (42) is provided with a throttling hole close to the end face of the medium side, the end face of the atmosphere side of the inner gland (42) props against the end face of the medium side of the gland (41), an O-shaped sealing ring is lined between the end face of the atmosphere side of the inner gland (42) and the end face of the medium side of the gland (41), the cooler (5) is rotatably sleeved outside the shaft sleeve (2) through the through hole in the middle and is fixedly connected with the inner gland (42) to form a closed cooling chamber, the cooling water inlet and outlet holes of the inner gland (42) respectively correspond to a flow passage inlet and outlet of the cooler (5), the cooler (5) is internally provided with guide plates (51) which are arranged in a staggered manner, the throttling ring (6) is rotatably sleeved outside the shaft sleeve (2) through the through hole in the middle and the throttling hole of the inner gland (42) is hooped outside the throttling ring (6), the inner circle of the throttling ring (6) is provided with a labyrinth groove, a spring (7) is arranged between the throttling ring (6) and the cooler (5), two ends of the spring (7) respectively abut against the atmosphere side end face of the throttling ring (6) and the medium side end face of the cooler (5), the cover plate (8) is rotatably sleeved outside the shaft sleeve (2) through a through hole in the middle, the cover plate (8) respectively covers the medium side end face of the throttling ring (6) and the medium side end face of the inner gland (42), and the cover plate (8) and the medium side end face of the inner gland (42) are fixedly connected through screws.
2. The hybrid power groove high-temperature high-pressure mechanical sealing device as claimed in claim 1, wherein: the movable ring sleeve grooves (221) are divided into at least one circle, the movable ring sleeve grooves (221) of each circle are arranged on a circumference concentric with the end surface of the movable ring sleeve (22) close to the friction pair side, and the movable ring sleeve grooves (221) of two adjacent circles are arranged in a staggered mode along the radial direction of the end surface of the movable ring sleeve (22) close to the friction pair side;
the depth of the dynamic ring groove (311) is 0.5 mm-2 mm, and the depth of the non-rotation dynamic groove (312) is 1 μm-10 μm.
3. The use method of the composite power groove high-temperature high-pressure mechanical sealing device as claimed in claim 1 or 2, is characterized in that: the method is implemented in sequence according to the following steps:
rotating: the rotating shaft (1) rotates to drive the shaft sleeve (2), the boss (21) and the moving ring (31) to synchronously rotate, the shaft sleeve (2), the boss (21) and the moving ring (31) are kept relatively static with the rotating shaft (1), the static ring (32), the static ring seat (33), the gland (41), the inner gland (42), the cooler (5), the throttling ring (6) and the cover plate (8) do not rotate along with the rotating shaft (1), and the static ring (32), the static ring seat (33), the gland (41), the inner gland (42), the cooler (5), the throttling ring (6) and the cover plate (8) are kept relatively rotating with the rotating shaft (1);
sealing: when the mechanical seal operates, cooling water is introduced into a cooling water inlet on the excircle side of the inner gland (42) and flows out from a cooling water outlet after passing through a guide plate (51) of the cooler (5). The sealed high-temperature medium fluid is mostly blocked outside the mechanical seal by the throttling ring, and part of the fluid entering the mechanical seal chamber is subjected to heat exchange with cooling water on the other side of the cooler (5) when the fluid passes through a gap formed by the cooler (5) and the shaft sleeve (2), so that the temperature is remarkably reduced. The medium inside the mechanical seal flows in a through hole of a medium gland (41), turbulent flow is formed when the sealing medium fluid flows to the end face of the movable ring sleeve (22) close to the friction pair side, the sealing medium fluid penetrates between the medium side end face of the static ring (32) and the atmosphere side end face of the movable ring (31) to form a sealing liquid film, and the medium inside the mechanical seal flows out to an external heat exchanger through a medium inlet and outlet formed in the gland (41) and returns to a sealing cavity after being cooled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011066523.8A CN114321372A (en) | 2020-09-30 | 2020-09-30 | High-temperature high-pressure mechanical sealing device for composite power groove and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011066523.8A CN114321372A (en) | 2020-09-30 | 2020-09-30 | High-temperature high-pressure mechanical sealing device for composite power groove and using method thereof |
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| CN114321372A true CN114321372A (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011066523.8A Pending CN114321372A (en) | 2020-09-30 | 2020-09-30 | High-temperature high-pressure mechanical sealing device for composite power groove and using method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117468996A (en) * | 2023-12-28 | 2024-01-30 | 中国核动力研究设计院 | Dry gas seal structure and supercritical carbon dioxide turbine system |
-
2020
- 2020-09-30 CN CN202011066523.8A patent/CN114321372A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117468996A (en) * | 2023-12-28 | 2024-01-30 | 中国核动力研究设计院 | Dry gas seal structure and supercritical carbon dioxide turbine system |
| CN117468996B (en) * | 2023-12-28 | 2024-05-03 | 中国核动力研究设计院 | Dry gas seal structure and supercritical carbon dioxide turbine system |
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