Ultra-high temperature resistant metal bellows double-end-face mechanical seal structure
By designing a double-end mechanical seal structure with ultra-high temperature resistant metal bellows, combined with a quench chamber, isolation chamber, and cooling components, the cooling and lubrication problems of mechanical seals under high or ultra-high temperature conditions are solved, achieving stable operation of the mechanical seal and extending its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZIGONG BEE BRAND MECHANICAL SEAL CO LTD
- Filing Date
- 2025-07-01
- Publication Date
- 2026-06-05
AI Technical Summary
Existing mechanical seals are difficult to effectively cool and lubricate under high or ultra-high temperature conditions, leading to seal failure and deformation, and thus failing to meet the requirements for use under high or ultra-high temperature conditions.
A double-end mechanical seal structure with ultra-high temperature resistant metal bellows was designed, which includes a quench chamber, an isolation chamber and a cooling component. The quench liquid and the isolation liquid work together to achieve cooling and lubrication of the inner and outer sides of the mechanical seal. The bellows compensates for friction loss and the cooling component reduces heat conduction.
Under high or ultra-high temperature conditions, the mechanical seal structure can work stably, effectively reduce heat conduction, ensure sealing effect, and extend service life.
Smart Images
Figure CN224326689U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical seal technology, and more specifically, to a double-end mechanical seal structure for ultra-high temperature resistant metal bellows. Background Technology
[0002] Mechanical seals are used in over 80% of fluid transport and mixing equipment in most industries, including petroleum, chemical, papermaking, and power. The adaptability and extended service life of mechanical seals have always been areas of research and development in this field. Furthermore, the proper functioning of mechanical seals requires rational design and material selection for each component to meet usage requirements.
[0003] Under normal operating conditions, mechanical seals only require a sufficient amount of sealing fluid to achieve cooling and lubrication. However, in high-temperature environments, the heat conducted from inside fluid conveying or mixing equipment cannot be adequately cooled and lubricated by the sealing fluid alone. Furthermore, existing spring-type mechanical seals generally operate at temperatures below 300°C, and excessively high temperatures can lead to loss of elasticity and deformation. The maximum operating temperature of existing rubber seals is also insufficient for use in high-temperature or ultra-high-temperature conditions.
[0004] Therefore, there is an urgent need for a double-end mechanical seal structure for ultra-high temperature resistant metal bellows. Utility Model Content
[0005] The purpose of this invention is to provide a double-end mechanical seal structure for ultra-high temperature resistant metal bellows, which can effectively solve the problem of stable normal operation of mechanical seals under high temperature and ultra-high temperature conditions.
[0006] To achieve the purpose of this utility model, the technical solution adopted is as follows: a double-end mechanical seal structure for ultra-high temperature resistant metal bellows, including a main shaft and a mechanical seal assembly mounted on the main shaft. The mechanical seal assembly also has a quenching chamber for filling quenching liquid and an isolation chamber for filling isolation liquid. The isolation chamber is located outside the quenching chamber. A cooling assembly for filling coolant is also installed on the medium side of the mechanical seal assembly, and the cooling assembly is sleeved on the main shaft.
[0007] Furthermore, the mechanical seal assembly includes an outer bushing and an inner bushing. The inner bushing is fitted onto the main shaft, and the outer bushing and the inner bushing are coaxially spaced apart. An outer end cover is installed on the outer end of the outer bushing and the outer end of the inner bushing. A bearing seat is installed on the inner end of the inner bushing, and an inner end cover is installed on the inner end of the outer bushing. Rotating rings are installed on both sides of the bearing seat, and stationary ring one is installed on each of the two rotating rings. Stationary ring two is installed on the opposite surfaces of the inner end cover and the outer end cover. A bellows connects the oppositely arranged stationary ring one and stationary ring two. A quenching chamber is formed between the bellows and the inner bushing, and an isolation chamber is formed between the bellows and the outer bushing.
[0008] Furthermore, a pressure cap is fixed to the inner side of the outer end cap, and the pressure cap is provided with a quench liquid outlet and a quench liquid inlet that communicate with the quench chamber.
[0009] Furthermore, the gland also has an annular partition plate extending toward the shaft seat, with a certain distance between the extended end of the annular partition plate and the shaft seat, and the outlet end of the quench liquid inlet and the inlet end of the quench liquid outlet are located on both sides of the annular partition plate.
[0010] Furthermore, a bushing is fitted on the outer end of the inner bushing, the outer end face of the inner bushing is located inside the bushing, and a pressure ring extending into the bushing is also installed on the main shaft; sealing rings are pressed between the bearing seat and the inner end face of the inner bushing, and between the pressure ring and the outer end face of the inner bushing.
[0011] Furthermore, a high-temperature resistant lip seal is also embedded in the inner circular surface of the outer end cap, and the high-temperature resistant lip seal is sealed to the outer wall of the bushing.
[0012] Furthermore, the outer bushing has an isolation fluid outlet communicating with the isolation cavity, the inner end cover has an isolation fluid inlet communicating with the isolation cavity, and the inner end cover also has a purging hole for purging the gap between the cooling assembly and the spindle.
[0013] Furthermore, the cooling assembly includes an annular base and a cap, the cap being disposed on the annular base, and a cooling chamber being formed inside the cap, the cooling chamber being located on the side of the annular base away from the mechanical seal assembly.
[0014] Furthermore, the cooling assembly also includes a flow guide sleeve fixed on an annular base, the flow guide sleeve is sleeved on the main shaft, and the flow guide sleeve is also provided with a flow guide groove, which communicates with the cooling chamber.
[0015] Furthermore, the drainage channel is spiral-shaped.
[0016] Furthermore, the drainage groove is located on the outer wall of the drainage sleeve, and the cooling assembly also includes an intermediate bushing fixed on the annular base. The intermediate bushing is mounted on the outer wall of the drainage sleeve, and the intermediate bushing is also provided with a water inlet channel connected to the drainage groove.
[0017] Furthermore, the annular base is also provided with a cooling medium inlet that connects to the water inlet channel and a cooling medium outlet that connects to the cooling chamber.
[0018] The beneficial effects of this utility model are:
[0019] 1. In this utility model, the rapid cooling chamber, the isolation chamber and the cooling components work together to ensure that both the inner and outer sides of the mechanical seal structure are fully cooled, lubricated and have reduced heat conduction.
[0020] 2. In this utility model, by connecting a bellows between stationary ring one and stationary ring two, not only can the isolation chamber and the quenching chamber be separated, but it can also effectively compensate for the friction loss of the mechanical seal in a high-temperature environment. Attached Figure Description
[0021] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.
[0022] Figure 1 This is a structural diagram of the ultra-high temperature resistant metal bellows double-end mechanical seal structure provided by this utility model.
[0023] The attached diagram shows the markings and corresponding component names:
[0024] 1. Mechanical seal assembly; 2. Cooling assembly; 3. Spindle;
[0025] 101. Outer bushing; 102. Inner bushing; 103. Outer end cap; 104. Inner end cap; 105. Shaft seat; 106. Rotating ring; 107. Stationary ring one; 108. Stationary ring two; 109. Bellows; 110. Quenching chamber; 111. Isolation chamber; 112. Gland; 113. Quenching liquid outlet; 114. Quenching liquid inlet; 115. Annular partition plate; 116. Isolation liquid outlet; 117. Isolation liquid inlet; 118. High temperature resistant lip seal; 119. Bushing; 120. Pressure ring; 121. Sealing ring; 122. Purge hole;
[0026] 201. Annular base; 202. Cap; 203. Cooling chamber; 204. Drain sleeve; 205. Drain groove; 206. Intermediate bushing; 207. Water inlet channel; 208. Cooling medium inlet; 209. Cooling medium outlet. Detailed Implementation
[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.
[0028] It should be noted that, where there is no conflict, the embodiments and features described in this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0029] like Figure 1As shown, the present invention provides a double-end mechanical seal structure for a high-temperature resistant metal bellows, including a main shaft 3 and a mechanical seal assembly 1 mounted on the main shaft 3. The mechanical seal assembly 1 forms a mechanical seal between the main shaft 3 and the equipment housing, thereby effectively preventing leakage of substances inside the equipment housing through the gap between the equipment housing and the main shaft 3.
[0030] The mechanical seal assembly 1 includes a quench chamber 110 and an isolation chamber 111. The isolation chamber 111 and the quench chamber 110 are two independent chambers, with the isolation chamber 111 located outside the quench chamber 110. The quench chamber 110 is filled with quenching fluid, which cools the spindle 3, reducing the heat conducted from the spindle 3 and ensuring that the inner side of the mechanical seal assembly 1 is also cooled by fluid. The isolation chamber 111 is filled with a sufficient amount of isolation fluid for flushing. Through the combined action of the quenching fluid in the quench chamber 110 and the isolation fluid in the isolation chamber 111, the mechanical seal can operate normally within its normal operating temperature range.
[0031] A cooling component 2 is installed on the side of the mechanical seal assembly 1 closest to the inside of the equipment housing. During installation, the end face of the cooling component 2 closest to the inside of the equipment housing does not extend beyond the inner wall of the equipment housing to avoid affecting the internal processes. The cooling component 2 is mounted on the mechanical seal assembly 1 and simultaneously sleeved on the main shaft 3.
[0032] In this invention, the rapid cooling chamber 110, the isolation chamber 111, and the cooling assembly 2 work together to ensure that both the inner and outer sides of the mechanical seal structure are adequately cooled, lubricated, and have their heat conduction reduced.
[0033] In this invention, the mechanical seal assembly 1 includes an outer bushing 101 and an inner bushing 102. The inner bushing 102 is fixedly sleeved on the main shaft 3 and seals with the main shaft 3. The outer bushing 101 and the inner bushing 102 are arranged coaxially at intervals, so that there is a certain gap between the inner wall of the outer bushing 101 and the outer wall of the inner bushing 102, forming a cavity between the outer wall of the inner bushing 102 and the inner wall of the outer bushing 101. An outer end cap 103 is installed on both the outer end of the outer bushing 101 and the outer end of the inner bushing 102, and the outer end cap 103 closes one end of the cavity between the outer wall of the inner bushing 102 and the inner wall of the outer bushing 101. The inner bushing 102 is shorter at the end closest to the inside of the equipment than the outer bushing 101. The inner end of the inner bushing 102 is also fixedly mounted with a bearing seat 105. The inner end of the outer bushing 101 is mounted with an inner end cover 104. There is a gap between the inner end cover 104 and the bearing seat 105. There is also a certain gap between the inner ring of the inner end cover 104 and the outer wall of the main shaft 3.
[0034] Rotating rings 106 are embedded on both sides of the bearing seat 105. The rotating rings 106 can rotate fully on the bearing seat 105, and the material of the rotating rings 106 can be selected according to requirements. On the other side of the rotating rings 106, a stationary ring 107 is installed to cooperate with its rotation seal. A stationary ring 108 is installed on the opposite surface of the inner end cover 104 and the outer end cover 103. The center of the stationary ring 108 and the stationary ring 107 is located on the central axis of the main shaft 3. A bellows 109 is connected between the corresponding stationary rings 107 and stationary ring 108. The bellows 109 is made of metal, which can not only effectively compensate for the friction loss of the mechanical seal in high temperature environment, but also is not easily deformed in high temperature environment.
[0035] The bellows 109, stationary ring 107, stationary ring 108, rotating ring 106, and bearing 105 at the end of the mechanical seal assembly away from the inside of the equipment work together to separate the cavity between the outer wall of the inner bushing 102 and the inner wall of the outer bushing 101 into a sealed chamber, which is the quench liquid chamber. The two bellows 109, two stationary rings 107, two stationary rings 108, two rotating rings 106, and bearing 105 work together to seal the cavity between the outer wall of the inner bushing 102 and the inner wall of the outer bushing 101 after separation, thereby forming an isolation chamber.
[0036] In this invention, in order to reduce the heat conducted from the spindle 3, long grooves can be formed on the outer wall of the inner bushing 102 and the surface of the bearing seat 105. However, it should be noted that in order to ensure the sealing between the mechanical seal assembly 1 and the spindle 3, long grooves cannot be formed on the side of the bearing seat 105 that is in contact with the spindle 3.
[0037] In this invention, to facilitate the installation of the bellows 109, mounting seats for installing the bellows 109 can also be installed on the stationary ring 107 and the stationary ring 108. Of course, when the stationary ring 107 and the stationary ring 108 are sufficient for the installation of the bellows 109, mounting seats may not be necessary. Furthermore, to ensure the sealing of the quench chamber 110 and the isolation chamber 111, a sealing ring 121 that seals with the rotating ring 106 can also be provided on the shaft seat 105. This sealing ring 121 can be a high-temperature resistant gasket, a flexible graphite ring, or a metal sealing ring 121.
[0038] To facilitate the entry of quenching liquid into the quenching chamber 110, a pressure cap 112 is attached and fixed to the side of the outer end cap 103 near the inside of the equipment. The inner diameter of the pressure cap 112 is smaller than the inner diameter of the outer end cap 103, and a quenching liquid outlet 113 is provided on the pressure cap 112. A quenching liquid inlet 114 is also provided on the outer end cap 103, so that the quenching liquid can enter the quenching chamber 110 through the quenching liquid inlet 114. After heat exchange, the quenching liquid in the quenching chamber 110 can be discharged from the quenching liquid outlet 113.
[0039] To improve the heat exchange effect of the quench liquid, the pressure plate 112 also has an annular partition plate 115 extending towards the shaft seat 105. The central axis of the annular partition plate 115 is on the same straight line as the central axis of the main shaft 3, and there is a certain distance between the extended end of the annular partition plate 115 and the shaft seat 105, so that the annular partition plate 115 divides the quench chamber 110 into two connected chambers. At this time, the outlet end of the quench liquid inlet 114 and the inlet end of the quench liquid outlet 113 are located on both sides of the annular partition plate 115, which avoids the quench liquid entering the quench chamber 110 from not flowing sufficiently, so that the quench liquid entering the quench chamber 110 can fully exchange heat, and the heat exchange effect of the quench liquid is better.
[0040] Furthermore, a bushing 119 is fitted onto the outer end of the inner bushing 102, and the bushing 119 is fixed to the inner bushing 102, with the outer end face of the inner bushing 102 located inside the bushing 119. Simultaneously, a pressure ring 120 is installed on the main shaft 3 and sealed therewith. The pressure ring 120 has a flange extending into the bushing 119. Sealing rings 121 are also provided on both end faces of the inner bushing 102. The sealing rings 121 are fitted onto the main shaft 3, with the sealing ring 121 at the outer end of the inner bushing 102 pressed between the end face of the inner bushing 102 and the flange on the pressure ring 120, and the sealing ring 121 at the inner end of the inner bushing 102 pressed between the end face of the inner bushing 102 and the shaft seat 105. Of course, to ensure the fixation of the pressure ring 120, a fixing seat is provided at the end of the bushing 119 near the pressure ring 120, and the pressure ring 120 and the fixing seat can be fixedly connected by bolts. In addition, the sealing ring 121 may also be a high-temperature resistant gasket or a flexible graphite or metal sealing ring 121.
[0041] To ensure the airtightness of the quench chamber 110, a high-temperature resistant lip seal 118 is also installed on the inner circular surface of the outer end cover 103. The high-temperature resistant lip seal 118 seals the gap between the inner circular surface of the outer end cover 103 and the outer wall of the bushing 119, preventing the quench liquid from leaking from the gap between the inner circular surface of the outer end cover 103 and the outer wall of the bushing 119.
[0042] To facilitate the feeding and discharging of the isolation fluid into and out of the isolation chamber 111, the outer bushing 101 is provided with an isolation fluid outlet 116 communicating with the isolation chamber 111, and the inner end cover 104 is provided with an isolation fluid inlet 117 communicating with the isolation chamber 111, so that the feeding and discharging of the isolation fluid are located at both ends of the isolation chamber 111, thus ensuring the heat exchange effect of the isolation fluid.
[0043] Because there is a certain gap between the cooling assembly 2 and the main shaft 3, when the material inside the equipment enters the gap between the cooling assembly 2 and the main shaft 3, a purging hole 122 is provided on the inner end cover 104 to purge the gap between the cooling assembly 2 and the main shaft 3 for easy cleaning. Since there is no sealing structure between the bellows 109 near the inside of the equipment in the mechanical seal assembly 1 and the main shaft 3, the material inside the equipment will also enter the bellows 109 when it enters the gap between the cooling assembly 2 and the main shaft 3. Therefore, in the design of the purging hole 122, the outlet end of the purging hole 122 can be located on the end face of the inner end cover 104 away from the inside of the equipment, and the outlet end of the purging hole 122 is located inside the stationary ring 108 installed on the inner end cover 104, so that the purging medium entering through the purging hole 122 can act on the inner wall of the bellows 109, thereby realizing the purging of the inner wall of the bellows 109.
[0044] In this invention, the purge hole 122 can also be used to flush the inner wall of the bellows 109 near the inside of the mechanical seal assembly 1 and the gap between the cooling assembly 2 and the main shaft 3. At this time, the medium entering the purge hole 122 is flushing liquid. In addition, the purge hole 122 can also be used as a drain hole for the discharge of small amounts of material inside the equipment.
[0045] In this utility model, the cooling assembly 2 includes an annular base 201 and a cap 202. The annular base 201 is fixed on the inner end cap 104 in the mechanical seal assembly 1, and the inner end face of the cap 202 can be flush with the inner wall of the equipment. When the cap 202 is placed on the annular base 201, a cooling chamber 203 is formed inside the cap 202. The cooling chamber 203 is annular and contains a cooling medium. When this invention is installed on the main shaft 3 of the equipment, the cooling chamber 203 is located on the side of the annular base 201 away from the mechanical seal assembly 1. At this time, the cooling chamber 203 surrounds the main shaft 3 on the equipment. When the heat inside the equipment is transferred to the mechanical seal assembly 1 through the main shaft 3, the cooling medium in the cooling chamber 203 exchanges heat with the heat on the main shaft 3, thereby cooling the main shaft 3 and reducing the heat transferred from the main shaft 3 to the mechanical seal assembly 1. At the same time, the cooling medium in the cooling chamber 203 can play an isolation role between the material inside the equipment and the mechanical seal assembly 1, thereby preventing the heat of the material inside the equipment from directly acting on the mechanical seal assembly 1.
[0046] The cooling assembly 2 also includes a drain sleeve 204. The inner wall of the drain sleeve 204 is clearance-fitted with the outer wall of the spindle 3, ensuring that the spindle 3 can rotate normally while avoiding wear on the drain sleeve 204. During installation, the inner end of the drain sleeve 204 is welded to the cap 202, and the outer end of the drain sleeve 204 is welded to the annular base 201. The inner end of the drain sleeve 204 can be flush with the inner end face of the cap 202, and the outer end of the drain sleeve 204 extends beyond the inner end face of the annular base 201 towards the mechanical seal assembly 1. This eliminates the need for an inner circular surface on the cap 202 to seal the cooling chamber 203 and allow the spindle 3 to pass through. The inner end of the drain sleeve 204 can be used as the inner circular surface of the cap 202. This simplifies the structure of the cooling assembly 2 while ensuring the formation of the cooling chamber 203.
[0047] The outer end of the flow guide sleeve 204 is also provided with a flow guide groove 205, which is connected to the cooling chamber 203, allowing the cooling medium to flow into the cooling chamber 203 after passing through the flow guide groove 205. By providing the flow guide groove 205 on the flow guide sleeve 204, when the cooling medium flows with the flow guide groove 205, the cooling medium is also held against the outer wall of the main shaft 3, increasing the length of the cooling medium holding the main shaft 3. As heat is transferred from the spindle 3 to the mechanical seal assembly 1, it first exchanges heat with the cooling medium in the cooling chamber 203. This causes the heat to gradually decrease as it is transferred to the mechanical seal assembly 1. Consequently, the efficiency of heat exchange between the heat and the cooling medium gradually decreases. Although the amount of cooling medium flowing in the drainage groove 205 is less than that in the cooling chamber 203, it still ensures further cooling of the spindle 3. At the same time, by setting the drainage groove 205, the thickness of the drainage sleeve 204 can be minimized. This allows the outer end of the drainage sleeve 204 to extend as close as possible to the inside of the mechanical seal assembly 1 during installation, resulting in a longer length of cooling medium holding the spindle 3 and a better cooling effect.
[0048] The flow channel 205 is spiral-shaped, allowing it to cover the entire flow sleeve 204 as much as possible during design, thus improving the cooling effect on the spindle 3 when the cooling medium flows through it. Alternatively, in this invention, while ensuring effective heat exchange between the cooling medium and the spindle 3, the flow channel 205 can also be arranged to cover the entire circumference of the flow sleeve 204 after extending along its axial direction.
[0049] To facilitate the machining of the drainage groove 205, the drainage groove 205 can be formed on the outer circular surface of the drainage sleeve 204. In this case, an intermediate bushing 206 can be fitted around the drainage sleeve 204, with the outer end of the intermediate bushing 206 flush with the outer end of the drainage sleeve 204, and the inner end of the intermediate bushing 206 abutting against the outer end face of the annular base 201 and fixed to the annular base 201. To ensure that the cooling medium enters the drainage groove 205, a water inlet channel 207 communicating with the drainage groove 205 is also provided inside the intermediate bushing 206. To facilitate the machining of the water inlet channel 207, the water inlet channel 207 penetrates through the inner end face of the intermediate bushing 206.
[0050] In this utility model, the outlet end of the purge hole 122 can also be set on the inner circular surface of the outer end cover 103. In this case, in order to avoid the intermediate bushing 206 blocking the outlet end of the purge hole 122, a guide groove corresponding to the outlet end of the purge hole 122 can be set on the inner circular surface of the outer end cover 103, and the guide groove can penetrate the end face of the outer end cover 103 away from the inside of the equipment. In this case, the outlet end of the guide groove is located inside the stationary ring 108.
[0051] The annular base 201 is also provided with a cooling medium inlet 208 that connects to the water inlet channel 207 and a cooling medium outlet 209 that connects to the cooling chamber 203. The cooling medium outlet 209 is located at the end of the cooling chamber 203 away from the inside of the equipment, so that the cooling medium enters the water inlet channel 207 through the cooling medium inlet 208 and then enters the diversion channel 205, and then enters the cooling chamber 203 after passing through the entire diversion channel 205, and finally exits from the cooling medium outlet 209, so that the heat exchange effect of the cooling medium is better.
[0052] In use, the cooling medium enters the water inlet channel 207, the diversion groove 205, and the cooling chamber 203 sequentially through the cooling medium inlet 208. The cooling medium in the diversion groove 205 and the cooling chamber 203 exchanges heat with the main shaft 3 and is discharged from the cooling medium outlet 209 after heat exchange. The quench liquid enters the quench chamber 110 through the quench liquid inlet 114. After the quench liquid exchanges heat with the inner bushing 102 and the main shaft 3, the quench liquid after heat exchange is discharged from the quench liquid outlet 113. The isolation liquid enters the isolation chamber 111 through the isolation liquid inlet 117. After the isolation liquid exchanges heat with the bearing seat 105, the rotating ring 106, the stationary ring one 107, the stationary ring two 108, and the bellows 109, the isolation liquid after heat exchange is discharged from the isolation liquid outlet 116.
[0053] When it is necessary to purge or flush the inner wall of the bellows 109 near the inside of the equipment in the mechanical seal assembly 1, the gap between the cooling assembly 2 and the main shaft 3, the purging medium or flushing medium enters through the purging hole 122. The purging medium or flushing medium enters the inner wall of the bellows 109 and the gap between the cooling assembly 2 and the main shaft 3 for purging or flushing. After purging or flushing, it enters the inside of the equipment.
[0054] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.
Claims
1. A double-end mechanical seal structure for ultra-high temperature resistant metal bellows, characterized in that, The assembly includes a spindle (3) and a mechanical seal assembly (1) mounted on the spindle (3). The mechanical seal assembly (1) also has a quench chamber (110) for filling with quench fluid and an isolation chamber (111) for filling with isolation fluid. The isolation chamber (111) is located outside the quench chamber (110). A cooling assembly (2) for filling with coolant is also installed on the medium side of the mechanical seal assembly (1), and the cooling assembly (2) is sleeved on the spindle (3).
2. The ultra-high temperature resistant metal bellows double-end mechanical seal structure according to claim 1, characterized in that, The mechanical seal assembly (1) includes an outer bushing (101) and an inner bushing (102). The inner bushing (102) is sleeved on the main shaft (3), and the outer bushing (101) and the inner bushing (102) are coaxially spaced. An outer end cap (103) is installed on the outer end of the outer bushing (101) and the outer end of the inner bushing (102). A bearing seat (105) is installed on the inner end of the inner bushing (102), and an inner end cap (104) is installed on the inner end of the outer bushing (101). Rotary bearings are installed on both sides of the bearing seat (105). The two rotating rings (106) are each equipped with a stationary ring (107); the inner end cover (104) and the outer end cover (103) are each equipped with a stationary ring (108); the stationary rings (107) and (108) are connected by a bellows (109); a quenching chamber (110) is formed between the bellows (109) and the inner bushing (102); and an isolation chamber (111) is formed between the bellows (109) and the outer bushing (101).
3. The ultra-high temperature resistant metal bellows double-end mechanical seal structure according to claim 2, characterized in that, The outer end cap (103) is also fixed with a pressure cap (112), and the pressure cap (112) is also provided with a quench liquid outlet (113) and a quench liquid inlet (114) that communicate with the quench chamber (110).
4. The ultra-high temperature resistant metal bellows double-end mechanical seal structure according to claim 3, characterized in that, The pressure cap (112) also has an annular partition plate (115) extending toward the shaft seat (105). The extended end of the annular partition plate (115) is spaced apart from the shaft seat (105), and the outlet end of the quench liquid inlet (114) and the inlet end of the quench liquid outlet (113) are located on both sides of the annular partition plate (115).
5. The ultra-high temperature resistant metal bellows double-end mechanical seal structure according to claim 2, characterized in that, The inner bushing (102) is also fitted with a bushing (119) at its outer end. The outer end face of the inner bushing (102) is located inside the bushing (119), and a pressure ring (120) extending into the bushing (119) is also installed on the main shaft (3). A sealing ring (121) is pressed between the bearing seat (105) and the inner end face of the inner bushing (102), and between the pressure ring (120) and the outer end face of the inner bushing (102).
6. The ultra-high temperature resistant metal bellows double-end mechanical seal structure according to claim 5, characterized in that, The inner circular surface of the outer end cap (103) is also fitted with a high-temperature resistant lip seal (118), which is sealed to the outer wall of the bushing (119).
7. The ultra-high temperature resistant metal bellows double-end mechanical seal structure according to claim 2, characterized in that, The outer bushing (101) has an isolation liquid outlet (116) communicating with the isolation chamber (111), the inner end cover (104) has an isolation liquid inlet (117) communicating with the isolation chamber (111), and the inner end cover (104) also has a purging hole (122) for purging the gap between the cooling assembly (2) and the spindle (3).
8. The ultra-high temperature resistant metal bellows double-end mechanical seal structure according to any one of claims 1 to 7, characterized in that, The cooling assembly (2) includes an annular base (201) and a cap (202). The cap (202) covers the annular base (201), and a cooling chamber (203) is formed inside the cap (202). The cooling chamber (203) is located on the side of the annular base (201) away from the mechanical seal assembly (1).
9. The ultra-high temperature resistant metal bellows double-end mechanical seal structure according to claim 8, characterized in that, The cooling assembly (2) also includes a flow guide sleeve (204) fixed on the annular base (201). The flow guide sleeve (204) is sleeved on the main shaft (3), and the flow guide sleeve (204) is also provided with a flow guide groove (205), which is connected to the cooling chamber (203).
10. The ultra-high temperature resistant metal bellows double-end mechanical seal structure according to claim 9, characterized in that, The diversion groove (205) is located on the outer wall of the diversion sleeve (204), and the cooling assembly (2) also includes an intermediate bushing (206) fixed on the annular base (201). The intermediate bushing (206) is mounted on the outer wall of the diversion sleeve (204), and the intermediate bushing (206) is also provided with a water inlet channel (207) connected to the diversion groove (205). The annular base (201) is also provided with a cooling medium inlet (208) connected to the water inlet channel (207) and a cooling medium outlet (209) connected to the cooling chamber (203).