CN115929909B - Mechanical seal for high-temperature oil pump - Google Patents
Mechanical seal for high-temperature oil pumpInfo
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- CN115929909B CN115929909B CN202211172778.1A CN202211172778A CN115929909B CN 115929909 B CN115929909 B CN 115929909B CN 202211172778 A CN202211172778 A CN 202211172778A CN 115929909 B CN115929909 B CN 115929909B
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Abstract
本发明提供了一种高温油泵用机械密封，包括轴套以及套装在其外部的压盖和密封座，轴套一端的外壁上设有安装环，安装环外周壁与密封座内侧的第一安装腔内壁之间形成介质通道；第一安装腔与安装环之间配装有主密封，主密封内壁与轴套外壁之间形成第一密封腔；密封座外侧壁与油泵腔体内壁之间形成第一隔离腔；轴套与安装环对应一端的内壁与转轴之间形成第二隔离腔，第二隔离腔通过第一密封腔与所述第一隔离腔相连通；压盖侧壁上开设有与第一隔离腔连通的进液孔以及与第二隔离腔连通的出液孔。本发明公开的一种高温油泵用机械密封，在高温介质接触密封磨面之前就得到冷却，避免主密封磨面发热量过高，保证密封性能稳定。
The present invention provides a mechanical seal for a high-temperature oil pump, comprising a shaft sleeve, a pressure cover and a sealing seat mounted on the outside thereof; a mounting ring is provided on the outer wall of one end of the shaft sleeve, and a medium channel is formed between the outer peripheral wall of the mounting ring and the inner wall of the first mounting cavity inside the sealing seat; a main seal is provided between the first mounting cavity and the mounting ring, and a first sealing cavity is formed between the inner wall of the main seal and the outer wall of the shaft sleeve; a first isolation cavity is formed between the outer wall of the sealing seat and the inner wall of the oil pump cavity; a second isolation cavity is formed between the inner wall of the shaft sleeve and the corresponding end of the mounting ring and the rotating shaft, and the second isolation cavity is connected to the first isolation cavity through the first sealing cavity; a liquid inlet hole connected to the first isolation cavity and a liquid outlet hole connected to the second isolation cavity are provided on the side wall of the pressure cover. The mechanical seal for a high-temperature oil pump disclosed by the present invention is cooled before the high-temperature medium contacts the sealing grinding surface, thereby avoiding excessive heat generation of the main sealing grinding surface and ensuring stable sealing performance.
Description
Technical Field
The invention relates to the technical field of mechanical sealing, in particular to a mechanical sealing for a high-temperature oil pump.
Background
The mechanical seal is a shaft seal device of a rotary machine, since a rotating shaft penetrates inside and outside the machine so that there is a circumferential gap between the shaft and the machine, through which the medium in the machine leaks out, and if the pressure in the machine is lower than the atmospheric pressure, air leaks into the machine, so that a shaft seal device for preventing leakage is necessary. Shaft seals are of many types, and mechanical seals are the most important shaft sealing means in these devices because of their advantages such as small leakage and long life.
In the prior conventional double-end mechanical sealing device, in order to improve the tightness of a sealing grinding surface, an isolation cavity, namely a sealing cavity, is usually arranged between the inner wall of a sealing assembly and the outer wall of a shaft sleeve, and isolation liquid is introduced into the sealing cavity for cooling the sealing grinding surface, but in the environment of a high-temperature oil pump, the sealing grinding surface is also subjected to high temperature from a medium besides bearing heat generated by self friction due to high medium temperature, so that higher requirements are put on the high-temperature resistance of the mechanical seal, the cooling requirement cannot be met only by virtue of cooling of the sealing cavity in the prior structure, and on the other hand, if the heat of the sealing grinding surface cannot be effectively cooled, a large amount of heat is transferred to a rotating shaft, and the rotating shaft is easy to deform, so that the risk of failure of the shaft seal is caused.
Disclosure of Invention
The mechanical seal for the high-temperature oil pump overcomes at least one defect in the prior art, is cooled before a high-temperature medium contacts a seal grinding surface, and avoids the excessive heating value of a main seal grinding surface, so that stable sealing can be realized in the high-temperature medium.
The invention provides a mechanical seal for a high-temperature oil pump, which comprises a shaft sleeve, wherein the shaft sleeve is sleeved outside a rotating shaft, a gland and a sealing seat are sleeved outside the shaft sleeve, the gland and the sealing seat are axially connected, a first mounting cavity is formed in the inner side of the sealing seat, which is far away from one end of the gland, the first mounting cavity is arranged on the inner side of the sealing seat, which is far away from one end of the gland, the mounting ring is rotatably accommodated in the first mounting cavity along the circumferential direction, so that a medium channel is formed between the outer peripheral wall of the mounting ring and the inner wall of the first mounting cavity, a main seal is assembled in the first mounting cavity, one end of the main seal, which is far away from the first mounting cavity, is assembled on the mounting ring, a first sealing cavity is formed between the inner wall of the main seal and the outer wall of the shaft sleeve, a first isolating groove which is concave and annular is formed on the outer side wall of the sealing seat, when the mechanical seal is arranged in the oil pump cavity, a first isolating cavity is formed between the first isolating cavity and the first isolating cavity, a first isolating cavity is formed between the first isolating cavity and the first liquid cavity is formed in the first isolating cavity, a second isolating cavity is formed towards the inner side of the first sealing cavity, a second isolating cavity is formed between the first isolating cavity and the second isolating cavity is communicated with the first isolating cavity through the first isolating cavity, and the first isolating cavity is formed between the first isolating cavity and the second isolating cavity.
Compared with the prior art, the invention has the advantages that:
In the mechanical sealing structure, the gland and the sealing seat structure outside the shaft sleeve are reasonably improved, the mounting ring is arranged at the outer side of one end of the shaft sleeve and is in rotary fit in the inner cavity of the sealing seat, so that a medium channel is formed between the outer side of the mounting ring and the inner wall of the first mounting cavity, a first isolation cavity and a second isolation cavity are respectively arranged at the inner side and the outer side in the radial direction of the medium channel, and cooling liquid is circularly fed into the first isolation cavity and the second isolation cavity towards the first isolation cavity through corresponding liquid inlet holes and liquid outlet holes formed in the gland and used for cooling media in the medium channel, namely, the high-temperature media are fully cooled before contacting the main sealing grinding surface, so that the heat of the main sealing grinding surface is reduced; in still another aspect, a first sealing cavity is further arranged between the main seal and the rotating shaft, the first sealing cavity is also filled with cooling liquid, and the first isolating cavity is communicated with the second isolating cavity through the first sealing cavity, namely, only one liquid inlet hole and one liquid outlet hole are formed, so that the structure is simple, the processing is convenient, the inner side of the main seal grinding surface is washed and cooled through the cooling liquid in the first sealing cavity, the cooling of the main seal grinding surface is further realized, the risk of thermal deformation of the main seal ring is avoided, the thermal cracking is avoided, and the service life of the mechanical seal is prolonged.
In addition, the first sealing cavity and the second sealing cavity are axially blocked through the arrangement of the framework oil seal, and a corresponding cooling cavity is arranged between the inner wall of the first shaft sleeve and the outer wall of the rotating shaft, so that the main seal is sleeved outside the first shaft sleeve, the friction surface needs to bear higher pressure, the heat generation is more serious in a high-pressure environment, the cooling cavity can enable cooling liquid in the first sealing cavity to flow through the rotating shaft corresponding to the main seal at the same time for carrying out local cooling and cooling, and the water inlet of the cooling cavity is positioned close to the main seal, so that the cooling liquid entering from the liquid inlet hole enters the first sealing cavity, firstly passes through the position of the main sealing surface for cooling, then enters the cooling cavity, finally enters the second sealing cavity and flows out from the liquid outlet hole.
The improved structure is characterized in that a driving seat which is used for being in transmission connection with the rotating shaft is sleeved on the outer side of one end, far away from the mounting ring, of the shaft sleeve, a second mounting cavity is formed in the inner side, far away from one end of the sealing seat, of the gland, an auxiliary seal is arranged in the second mounting cavity in a matched mode, one end, far away from the gland, of the auxiliary seal is arranged on the driving seat, a second sealing cavity is formed between the inner wall of the auxiliary seal and the outer wall of the shaft sleeve, the second sealing cavity is respectively communicated with the second isolation cavity and the liquid outlet, a framework oil seal is further arranged on the inner side, close to one end of the gland, of the sealing seat, and the inner ring of the framework oil seal is in sealing and rotatable fit with the outer wall of the shaft sleeve and is used for axially blocking liquid flow between the first sealing cavity and the second sealing cavity. In the improved structure, the axial blocking of the first sealing cavity and the second sealing cavity is realized through the framework oil seal, so that the cooling liquid in the first sealing cavity can only flow into the second isolation cavity first and then enter the second sealing cavity, and the primary sealing position is fully ensured to be cooled first.
And when the shaft sleeve is arranged outside the rotating shaft, a cooling cavity is formed between the inner groove and the outer wall of the rotating shaft, one end of the cooling cavity is communicated with the second isolation cavity, and the other end of the cooling cavity is communicated with the second sealing cavity. In the improved structure, the inner groove extending along the axial direction of the inner wall of the shaft sleeve is formed on the inner wall of the shaft sleeve, so that an effective cooling cavity is formed after the inner groove is matched with the rotating shaft, excessive friction heat of the main seal and the auxiliary seal is prevented from being transferred to the rotating shaft, the rotating shaft is prevented from deforming, and normal operation is ensured.
The main seal comprises a driving ring and a main static ring, wherein a first mounting groove is formed in the bottom of the first mounting cavity, one end of the main static ring is axially and slidably arranged in the first mounting groove, an annular second mounting groove is formed in one end of the mounting ring, which is close to the main static ring, one end of the driving ring is arranged in the second mounting groove, a gap is reserved between the inner wall of the driving ring and the side wall of the second mounting groove, the other end of the driving ring is in butt joint with the other end of the main static ring in a relative rotating mode in the circumferential direction, a first elastic compensation piece is arranged between the bottom of the first mounting groove and the main static ring, a first channel communicated to the first mounting groove is formed in the side wall, which is close to one end of the gland, of the first isolation groove, and a second channel communicated with the second isolation cavity is formed in the bottom of the second mounting groove. In the improved structure, the static ring compensation structure is adopted, and the main static ring part is static, namely the first elastic compensation piece is static, so that the stable compensation of the abrasion loss of the auxiliary sealing grinding surface is ensured, in addition, the positions of the first channel and the second channel are arranged, so that the cooling liquid in the first isolation cavity can be ensured to smoothly fill the first sealing cavity and then enter the second isolation cavity again, the medium in the medium channel is ensured to be fully cooled, meanwhile, the cooling liquid in the first sealing cavity realizes the real-time flushing and cooling of the inner side of the main sealing surface, and the risk of thermal cracking of the sealing ring caused by overlarge heating value of a friction pair consisting of the main sealing ring and the main static ring is avoided.
The auxiliary seal comprises an auxiliary moving ring, an auxiliary static ring and an auxiliary static ring seat, wherein an installation step is arranged at one end, close to the gland, of the driving seat, one end of the auxiliary moving ring is assembled on the installation step, a third installation groove is formed in the inner side, far away from one end of the sealing seat, of the gland, one end of the auxiliary static ring seat is assembled in the third installation groove in a sliding manner, one end of the auxiliary static ring is in butt joint with the other end of the auxiliary moving ring in a relatively rotatable manner, the other end of the auxiliary static ring is assembled at the other end of the auxiliary static ring seat, and a second elastic compensation piece is arranged between the tail end of the auxiliary static ring seat and the bottom of the third installation groove. In the improved structure, the auxiliary moving ring is directly installed by using the driving seat, the moving ring seat is not required to be added, the structure is simplified, the disassembly and the assembly are convenient, and the cost is reduced.
Further improved, a metal lantern ring is assembled on the circumferential outer wall of the auxiliary moving ring. In the improved structure, the stability of the auxiliary moving ring and the driving seat assembling structure is effectively improved by the metal sleeve ring, and the risk of cracking of the auxiliary moving ring is avoided.
And a fourth channel communicated with the second isolation cavity is formed on the side wall of the other end of the inner groove, and a fifth channel communicated with the liquid outlet hole is formed at the bottom of the second mounting groove. In the above-mentioned improved structure, the base plate is formed,
The sealing device is characterized in that a second mounting cavity is formed in the inner side of the gland close to one end of the sealing seat, one end of the sealing seat is assembled in the second mounting cavity, a plurality of connecting screws distributed along the circumferential direction are arranged on the gland, and each connecting screw is connected to the sealing seat. In the improved structure, one end of the sealing seat is assembled in the second installation cavity of the gland, and is axially connected and fixed through the connecting screw, so that the structure is simple, and the assembling is stable.
Drawings
FIG. 1 is a schematic view of a mechanical seal for a high temperature oil pump mounted on a rotating shaft;
FIG. 2 is a cross-sectional view of a sleeve according to the present invention;
FIG. 3 is an enlarged view of the structure at X in FIG. 1;
FIG. 4 is an enlarged view of the structure at Y in FIG. 1;
reference numerals illustrate:
1. A shaft sleeve; 1.1, a second isolation groove, 1.2, an inner groove, 1.3, a communication hole, 2, a gland, 2.1, a liquid inlet, 2.2, a liquid outlet, 2.3, a third installation groove, 2.4, a second installation groove, 3, a sealing seat, 3.1, a first installation groove, 3.2, a first isolation groove, 3.3, a first installation groove, 3.4, a first spring hole, 4, an installation ring, 4.1, a second installation groove, 5, a medium channel, 6, a first sealing groove, 7, a first isolation groove, 8, a second isolation groove, 9, a driving seat, 9.1, an installation step, 10, a second sealing groove, 11, a framework oil seal, 12, a cooling cavity, 13, a driving ring, 14, a main static ring, 14.1, a first pin groove, 15, a first channel, 16, a second channel, 17, an auxiliary ring, 18, an auxiliary static ring, 19, an auxiliary ring seat, 19.1, a static ring groove, 19.2, a second spring, 19.3, a second spring, 21, a second spring, a third spring, a fourth, a groove, a third spring, a fourth, a bolt, a fifth, a bolt, a fourth, a bolt, and a fourth bolt.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "external", "trailing", "outside", "inside", "bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "first", "second", "third", "fourth" and "fifth" are used for convenience of distinction and understanding, and are not specifically designated or defined. The tail end refers to one end away from the friction surface, for example, the tail end of the auxiliary static ring seat refers to one end of the auxiliary static ring seat away from the auxiliary static ring.
In the description of the present invention, unless explicitly stated and limited otherwise, the term "coupled" shall be interpreted as broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, or may be directly coupled, or may be indirectly coupled through an intermediate medium, or may be in communication with the interior of two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1, 2 and 3, the invention provides a mechanical seal for a high-temperature oil pump, which comprises a shaft sleeve 1 sleeved outside a rotating shaft, wherein a plurality of sealing rings are arranged between the inner wall of the shaft sleeve 1 and the outer wall of the rotating shaft, so that the sealing fit between the shaft sleeve 1 and the rotating shaft is realized; in addition, a gland 2 and a seal seat 3 which are connected with each other along the axial direction are sleeved outside the shaft sleeve 1, an outwards convex mounting ring 4 is arranged on the radial outer wall of one end of the shaft sleeve 1, which is close to the seal seat 3, the mounting ring 4 is rotatably contained in the first mounting cavity 3.1 along the circumferential direction, so that a medium channel 5 is formed between the outer peripheral wall of the mounting ring 4 and the inner wall of the first mounting cavity 3.1, a main seal is arranged on the inner side of one end, which is far away from the gland 2, of the seal seat 3, the end, which is far away from the seal seat 3, of the mounting ring 4 is sealed, a gap is reserved between the inner wall of the main seal and the outer wall of the shaft sleeve 1, so as to form a first seal cavity 6, the outer side wall of the seal seat 3 is provided with a first isolation groove 3.2 which is inwards concave and is annular along the axial direction, when the mechanical seal is arranged in the oil pump cavity, a first isolation cavity 7 is formed between the first isolation groove 3.2 and the inner wall of the oil pump cavity, the inner wall of the corresponding end of the shaft sleeve 1 and the mounting ring 4 inwards concave towards the outer side of the mounting ring 4 to form a second isolation groove 1.2, so that the second isolation cavity 1.2 is inwards concave towards the outer side of the mounting ring 4, so that the first isolation cavity 1.2 is communicated with the first isolation cavity 2 and the second isolation cavity 7.8 through the first isolation cavity 8, namely, the first isolation cavity 7 and the second isolation cavity 2 are respectively, and the second isolation cavity 7 are respectively communicated with the first isolation cavity 2 and the medium cavity 2 and the second isolation cavity 1, 8 isolation cavity 1 respectively, and the medium cavity 1 and the medium cavity are respectively, and the medium cavity 1 and the two isolation cavity and 8 through the medium cavity and respectively, and the medium cavity and respectively, in the mechanical seal installation operation process, cooling liquid is introduced from the liquid inlet hole 2.1, the cooling liquid sequentially enters the first isolation cavity 7, the first sealing cavity 6 and the second isolation cavity 8 and then is discharged from the liquid outlet hole 2.2, the cooling liquid is filled in the first isolation cavity 7, the second isolation cavity 8 and the first sealing cavity 6 through circulation, the cooling liquid is used for realizing real-time cooling of the medium channel 5 and the main seal, namely, in a high-temperature oil pump working condition, high-temperature medium is fully cooled before contacting the main seal, the friction heat of the main seal is effectively reduced, the cooling liquid of the other first sealing cavity 6 can also carry out real-time flushing and cooling on the inner side of the main seal, the main seal is further ensured not to generate excessive heat, the risk of thermal deformation even thermal cracking of the sealing ring of the main seal is avoided, the sealing performance of the main seal is effectively ensured, and the service life is prolonged.
In the embodiment, a driving seat 9 for driving connection with a rotating shaft is sleeved on the outer side of one end, far away from the mounting ring 4, of the shaft sleeve 1, an auxiliary seal is assembled on the inner side of one end, far away from the sealing seat 3, of the gland 2, the end, far away from the gland 2, of the auxiliary seal is assembled on the driving seat 9 in a sealing manner, a plurality of radially extending set screws 25 are arranged on the circumferential outer wall of the driving seat 9 in the structure, a plurality of communication holes 1.3 are correspondingly formed in the side wall of one end of the shaft sleeve 1, the inner ends of the set screws 25 penetrate through the corresponding communication holes 1.3 and are tightly matched with the rotating shaft to realize driving connection of the shaft sleeve 1 and the rotating shaft, and in the structure, the driving seat 9 is also used for installing the auxiliary seal, so that a mechanical sealing structure is simplified, and processing cost is reduced. Similarly, as shown in fig. 1, a second sealing cavity 10 is formed between the inner wall of the auxiliary seal and the outer wall of the shaft sleeve 1, and the second sealing cavity 10 is respectively communicated with the second isolation cavity 8 and the liquid outlet hole 2.2, namely, the cooling liquid introduced from the liquid inlet hole 2.1 sequentially passes through the first isolation cavity 7, the first sealing cavity 6 and the second isolation cavity 8 and then enters the second sealing cavity 10 again, so that the auxiliary seal is washed and cooled in real time, friction heat of the auxiliary seal is taken away in time, the sealing performance of the auxiliary seal is better ensured, and the service life of the auxiliary seal is prolonged.
In addition, since the main seal is in direct contact with the high-temperature medium in this embodiment, it is necessary to perform real-time flushing and cooling, as shown in fig. 1, the first seal cavity 6 and the second seal cavity 10 are axially connected, that is, the cooling liquid entering the first seal cavity 6 from the first seal cavity 7 can enter the second seal cavity 10 along the outside of the sleeve 1 in addition to the second seal cavity 8, in this embodiment, a skeleton oil seal 11 is mounted on the inner side of the seal seat 3 near one end of the gland 2, and the inner ring of the skeleton oil seal 11 is in sealing and rotatable fit with the outer wall of the sleeve 1, and the skeleton oil seal 11 is used for axially blocking the liquid flow between the first seal cavity 6 and the second seal cavity 10, that is, the cooling liquid in the first seal cavity 7 can only flow into the second seal cavity 8 along the first seal cavity 6, then enters the second seal cavity 10, and fully ensures that the main seal position is cooled.
More specifically, in this embodiment, an inner groove 1.2 extending along the axial direction of the inner groove is formed on the inner wall of the shaft sleeve 1, when the shaft sleeve 1 is installed outside the rotating shaft, a cooling cavity 12 is formed between the inner groove 1.2 and the outer wall of the rotating shaft, one end of the cooling cavity 12 is communicated with the second isolation cavity 8, and the other end of the cooling cavity 12 is communicated with the second sealing cavity 10. In the high-temperature medium environment, the sealing grinding surface is easy to generate more heat, the heat is transmitted to the rotating shaft at the same time, the deformation risk can occur when the temperature of the rotating shaft is too high, and therefore the performance of the rotating shaft can be affected.
The main seal comprises a drive ring 13 and a main static ring 14, a first mounting groove 3.3 is formed in the bottom of a first mounting cavity 3.1, one end of the main static ring 14 is arranged in the first mounting groove 3.3 in a sliding mode along the axial direction, an annular second mounting groove 4.1 is formed in one end of the mounting ring 4 close to the main static ring 14, one end of the drive ring 13 is arranged in the second mounting groove 4.1 in a matching mode, a sealing ring is arranged between the outer wall of one end of the drive ring 13 and the side wall of the second mounting groove 4.1 to achieve sealing fit, the other end of the drive ring 13 is in butt joint with the other end of the main static ring 14 in the circumferential direction in a relatively rotatable mode to form a main seal friction pair, in addition, a gap is reserved between the inner wall of the drive ring 13 and the side wall of the second mounting groove 4.1, cooling liquid can enter the cooling area of the drive ring 13, cooling efficiency is improved, a first channel 15 communicated to the first mounting groove 3.3 is further arranged on the side wall of the first isolating groove 3.2 close to one end of the gland 2, and a second channel 16 communicated with the bottom of the second isolating groove 4.1 is further arranged.
On the other hand, a first elastic compensation piece is arranged between the bottom of the first mounting groove 3.3 and the main static ring 14 in the structure, namely, the main seal is of a static ring compensation structure, and after the end face of the main static ring 13 or the end face of the main static ring 14 is worn, the main static ring 14 is driven to always have a trend of moving towards the main static ring 13 by the action of the first elastic compensation piece at the tail end of the main static ring 14, so that the sealing face is always attached and is not easy to leak. More specifically, as shown in fig. 4, the first elastic compensation member in this structure includes a plurality of first springs 26, a plurality of first spring holes 3.4 distributed along the circumferential direction are provided at the bottom of the first mounting groove 3.3, one end of each first spring 26 is fitted in the corresponding first spring hole 3.4, the end of each first spring 26 abuts against the bottom of the first spring hole 3.4, the other end of each first spring 26 abuts against the tail end of the main stationary ring 14, at least one first anti-rotation pin 27 is further provided at the bottom of the first mounting groove 3.3, and a first pin groove 14.1 matched with the first anti-rotation pin 27 is provided at the tail end of the main stationary ring 14. The plurality of first springs 26 are adopted for axially compensating the abrasion of the main sealing surface, so that the structure is simple, and the compensation force is uniform and stable.
In addition, in this embodiment, the auxiliary seal includes an auxiliary moving ring 17, an auxiliary stationary ring 18 and an auxiliary stationary ring seat 18, one end of the driving seat 9 near the gland 2 is provided with a mounting step 9.1, one end of the auxiliary moving ring 17 is assembled on the mounting step 9.1, and a metal collar 20 is assembled on the circumferential outer wall of the auxiliary moving ring 17, so that the structural strength of the auxiliary moving ring 17 is further ensured. The inner side of one end of the gland 2 far away from the sealing seat 3 is provided with a third mounting groove 2.3, one end of the auxiliary static ring seat 18 is slidably assembled in the third mounting groove 2.3, one end of the auxiliary static ring 18 is in butt joint with the other end of the auxiliary dynamic ring 17 in a relatively rotatable manner to form an auxiliary sealing friction pair, the other end of the auxiliary static ring 18 is assembled at the other end of the auxiliary static ring seat 18, in particular, one end of the auxiliary static ring seat 18 far away from the third mounting groove 2.3 is provided with a static ring groove 19.1, one end of the auxiliary static ring 18 far away from the auxiliary dynamic ring 17 is assembled in the static ring groove 19.1, in addition, a second elastic compensation piece is arranged between the tail end of the auxiliary static ring seat 18 and the bottom of the second mounting groove 4.1, in this structure, the auxiliary sealing in this structure adopts a static ring compensation structure, in particular, as shown in fig. 3, the second elastic compensation piece comprises a plurality of second springs 28, a plurality of second spring holes 19.2 distributed along the circumferential direction are arranged at the tail end of the auxiliary static ring seat 18, one end of each second spring 28 is assembled in the corresponding second spring holes 19.2, one end of each second spring hole is abutted against the tail end of the second hole 19.2 and at least one end of the second anti-rotation pin 2 is matched with the bottom of the second anti-rotation pin 2.2.3, and at least one end is matched with the second anti-rotation pin 2.2 is respectively, and at least one second anti-rotation pin 2 is arranged at the bottom 2, and is respectively, and is matched with the bottom, and is respectively. The plurality of second springs 28 are adopted for axially compensating the abrasion of the auxiliary sealing surface, so that the structure is simple, and the compensating force is uniform and stable.
In the structure, a third channel 21 communicated with the second sealing cavity 10 is formed on the side wall of the inner groove 1.2 near one end of the driving seat 9, the position of the third channel 21 corresponds to the position of the sealing surface of the auxiliary seal, the flushing and cooling effects are improved, a fourth channel 22 communicated with the second isolation cavity 8 is formed on the side wall of the other end of the inner groove 1.2, and a fifth channel 23 communicated with the liquid outlet hole 2.2 is formed at the bottom of the third mounting groove 2.3.
In the embodiment, a second mounting cavity 2.4 is arranged on the inner side of one end, close to the sealing seat 3, of the gland 2, one end of the sealing seat 3 is assembled in the second mounting cavity 2.4, a plurality of connecting screws 24 distributed along the circumferential direction are arranged on the gland 2, and each connecting screw 24 is connected to the sealing seat 3, so that the axial connection of the gland 2 and the sealing seat 3 is realized, and the structure is simple and the disassembly and assembly are convenient.
Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the invention.
Claims (8)
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| CN202211172778.1A CN115929909B (en) | 2022-09-26 | 2022-09-26 | Mechanical seal for high-temperature oil pump |
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| CN202211172778.1A CN115929909B (en) | 2022-09-26 | 2022-09-26 | Mechanical seal for high-temperature oil pump |
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| CN115929909B true CN115929909B (en) | 2025-08-01 |
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| CN211573856U (en) * | 2019-12-26 | 2020-09-25 | 宁波伏尔肯科技股份有限公司 | Two-way self-loopa carborundum mechanical seal device |
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|---|---|---|---|---|
| CN109027246A (en) * | 2018-10-31 | 2018-12-18 | 东莞市华汇精密机械有限公司 | A kind of mechanically-sealing apparatus of high viscosity ball mill |
| CN111120391A (en) * | 2019-12-26 | 2020-05-08 | 宁波伏尔肯科技股份有限公司 | Two-way self-loopa carborundum mechanical seal device |
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| Publication number | Publication date |
|---|---|
| CN115929909A (en) | 2023-04-07 |
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