CN209762246U - Container type mechanical seal for open type high-pressure screw compressor - Google Patents
Container type mechanical seal for open type high-pressure screw compressor Download PDFInfo
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- CN209762246U CN209762246U CN201920159086.0U CN201920159086U CN209762246U CN 209762246 U CN209762246 U CN 209762246U CN 201920159086 U CN201920159086 U CN 201920159086U CN 209762246 U CN209762246 U CN 209762246U
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- gland
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Abstract
The utility model discloses a container type mechanical seal for an open type high-pressure screw compressor, which comprises a movable ring, a static ring seat and a gland, wherein the movable ring, the static ring seat and the gland are connected into an integral structure; a step ring is arranged at one end of the shaft sleeve, one end of the movable ring is assembled on the step ring, and a first sealing ring is arranged between the bottom surface of the movable ring and the step ring; the static ring seat is provided with an installation step, one end of the static ring is assembled on the installation step, the other end of the static ring is attached to the other end of the movable ring, a second sealing ring is arranged between the static ring and the end surface of the installation step, and the first sealing ring and the second sealing ring are positioned on the same horizontal line; the gland is connected with the end face of the compressor shell, the static ring seat is slidably assembled on the gland, and a compensation assembly is arranged between the bottom of the static ring seat and the gland. The utility model provides an open-type high-pressure screw compressor is with collection dress formula mechanical seal can effectively balanced sealed axial force, reduces the sealing end face and warp, remains stable sealing performance throughout in high-pressure environment.
Description
Technical Field
The utility model relates to a mechanical seal technical field specifically is an open-type high pressure screw compressor is with collection dress formula mechanical seal.
Background
In recent years, the industrial refrigeration field in China is rapidly developed, and a refrigeration compressor is the core and the heart of a refrigeration system, and the capacity and the characteristics of the compressor determine the capacity and the characteristics of the refrigeration system. With the development of the refrigeration compressor technology and the improvement of the open screw compressor technology, the service pressure range and the service temperature range of the compressor are greatly expanded. High pressure compressors are increasingly used. At present, the mechanical seal for the high-pressure compressor is a traditional normal-pressure compressor. But the range of use of conventional refrigeration compressors: the use pressure is less than or equal to 2.5Mpa, the exhaust temperature is less than or equal to 125 degrees, and the mechanical seal is also selected according to the use working condition. Therefore, for the operating conditions of the high-pressure compressor: the use pressure is less than or equal to 7.5Mpa, and the use temperature is less than or equal to 260 ℃, so that the mechanical seal for the conventional compressor has design defects, exceeds the designed use range and cannot well cope with the high-pressure compressor.
In the prior art, under a high-pressure environment, the stress of a movable ring and a static ring cannot be effectively balanced, so that the movable ring and the static ring are easy to deform under the high-pressure condition, and the sealing performance of a sealing surface is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the container type mechanical seal for the open type high-pressure screw compressor can effectively balance the sealed axial force, reduce the deformation of the sealing end face and always keep stable sealing performance in a high-pressure environment.
The utility model adopts the technical proposal that: the integrated mechanical seal for the open-type high-pressure screw compressor comprises a shaft sleeve sleeved outside a rotating shaft, wherein a movable ring, a static ring seat and a gland are sleeved outside the shaft sleeve, and the movable ring, the static ring seat, the gland and the shaft sleeve are integrated; a step ring is arranged at one end of the shaft sleeve, one end of the movable ring is assembled on the step ring, and a first sealing ring is arranged between the bottom surface of the movable ring and the step ring; the static ring seat is provided with an installation step, one end of the static ring is assembled on the installation step, the other end of the static ring is attached to the other end of the movable ring, a second sealing ring is arranged between one end of the static ring close to the installation step and the end face of the installation step, and the first sealing ring and the second sealing ring are positioned on the same horizontal line; the end face of the gland is connected with the end face of the compressor shell, one end, deviating from the static ring, of the static ring seat is assembled on the gland in a sliding mode along the axial direction, and a compensation assembly is arranged between the bottom of the static ring seat and the gland.
Compared with the prior art, the utility model has the following advantage:
The utility model discloses an among the mechanical seal mechanism, for the axial force of balanced sealed face, reduce the seal end face and warp, the auxiliary seal circle setting of rotating ring, quiet ring mounted position is on same water flat line for whole machine seals when receiving the axial force, rotating ring, quiet ring force balance, even can not arouse local deformation because of the atress is uneven, thereby guarantees that the friction surface closely laminates throughout, guarantees good sealing performance.
As an improvement, the gland is provided with a mounting groove, one side of the mounting groove, which is close to the rotating shaft, is provided with a limit boss, the static ring seat is assembled in the mounting groove, and a third sealing ring is arranged between the inner side wall of the static ring seat and the outer side wall of the limit boss.
Preferably, the first sealing ring, the second sealing ring and the third sealing ring are located on the same horizontal line. The axial force of the seal can be further effectively balanced, and the deformation of the seal end face is reduced, so that the sealing performance is ensured.
As an improvement, the movable ring is provided with an annular boss at one end close to the step ring, and the stationary ring is provided with an annular boss at one end close to the mounting step, and the first sealing ring and the second sealing ring are correspondingly attached to the corresponding annular bosses respectively.
And after the movable ring and the static ring are matched, the two large oblique angles form a V-shaped groove. The structure can effectively disperse the force of high pressure on the sealing end face, and reduce the deformation of the sealing end face, thereby ensuring the sealing performance.
As an improvement, one end of the shaft sleeve is matched in the compressor shell, and the other end of the shaft sleeve is connected with the rotating shaft through the expansion type chuck. After the expansion type chuck structure is arranged, the shaft sleeve and the rotating shaft are tightly held and fixed more stably, and stable connection can be kept under a high-pressure working condition.
Preferably, the expansion chuck comprises an expansion sleeve, a first clamping ring and a second clamping ring, the expansion sleeve is sleeved on the shaft sleeve, the expansion sleeve is axially provided with a notch with two communicated ends, and an open slot is formed in the position, corresponding to the expansion sleeve, of the shaft sleeve; the first clamping ring and the second clamping ring are fixed on the expansion sleeve through bolts.
As an improvement, the gland is further provided with an annular sleeve, the side wall of the annular sleeve is circumferentially provided with a plurality of flushing holes for flushing the sealing surface, and the side wall of the gland is provided with a liquid inlet hole communicated with the flushing holes. The arrangement of the multi-point flushing hole structure can timely flush and cool the sealing surface, and a plurality of flushing points are arranged along the circumferential direction, so that the flushing effect is effectively improved, and the mechanical seal can be suitable for high-pressure working conditions.
In another improvement, a plurality of annular grooves are formed on the outer side wall of the step ring to form a throttling ring. The structure enables the end part of the shaft sleeve to play a throttling role for the buffer liquid.
Drawings
Fig. 1 is the structure schematic diagram of the container type mechanical seal for the open-type high-pressure screw compressor of the present invention.
Fig. 2 is a schematic structural diagram of the shaft sleeve of the present invention.
Fig. 3 is a schematic structural diagram of the gland in the present invention.
Fig. 4 is a schematic structural diagram of the annular sleeve of the present invention.
Fig. 5 is a schematic structural view of the expansion sleeve of the present invention.
Wherein, 100-rotating shaft, 110-shell, 1-shaft sleeve, 1.1-step ring, 1.2-open slot, 1.3-annular groove, 1.4-transmission pin hole, 2-rotating ring, 3-stationary ring, 4-stationary ring seat, 4.1-installation step, 5-gland, 5.1-installation groove, 5.2-limit boss, 5.3-liquid inlet hole, 6-first sealing ring, 7-second sealing ring, 8-third sealing ring, 9-annular boss, 10- 'V' -shaped groove, 11-expansion sleeve, 11.1-notch, 12-first clamping sleeve, 13-second clamping sleeve, 14-bolt, 15-annular sleeve, 15.1-flushing hole, 16-spring, 17-anti-rotation pin, 18-limit block
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "fitted" are to be understood broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the utility model provides a pair of collection dress formula mechanical seal for open-type high-pressure screw compressor, including the suit at the outside axle sleeve 1 of pivot 100, the outside cover of axle sleeve 1 is equipped with rotating ring 2, quiet ring 3, quiet ring seat 4 and gland 5, and rotating ring 2, quiet ring 3, quiet ring seat 4, gland 5 and axle sleeve 1 collection dress are monolithic structure.
As shown in fig. 2, one end of the shaft sleeve 1 is provided with a step ring 1.1, in this embodiment, the step ring 1.1 and the shaft sleeve are of an integral structure and are directly machined and molded by machining. Of course, in other embodiments, the stepped ring 1.1 and the shaft sleeve 1 body may also be fixedly connected into a whole through later welding or in a threaded manner.
One end of the movable ring 2 is assembled on the step ring 1.1, and a first sealing ring 6 is arranged between the bottom surface of the movable ring 2 and the step ring 1.1; in order to make the first sealing ring 6 more stable after being installed, an annular sealing ring groove is formed in the bottom surface of the stepped ring 1.1, one side of the first sealing ring 6 is matched in the sealing ring groove, and the other side of the first sealing ring protrudes out of the bottom surface of the stepped ring 1.1. In the structure, at least one driving pin 17 is further arranged at the bottom of the step ring 1.1, a driving pin hole 1.4 is correspondingly arranged on the end surface of the movable ring 2, and when the movable ring 2 is assembled on the step ring 1.1, the driving pin 17 is matched in the driving pin hole 1.4.
The static ring seat 4 is provided with an installation step 4.1, and one end of the static ring 3 is assembled on the installation step 4.1. Specifically, an anti-rotation pin (not shown in the figure) is arranged on the end face of the mounting step, and correspondingly, at least one anti-rotation pin hole is arranged on the end face of the stationary ring 3, and when the stationary ring 3 is assembled on the mounting step 4.1, the anti-rotation pin is matched in the anti-rotation pin hole.
The other end of the static ring 3 is jointed with the other end of the dynamic ring 2 to form a sealing grinding surface. A second sealing ring 7 is arranged between one end of the static ring 3 close to the mounting step 4.1 and the end face of the mounting step 4.1, and similarly, an annular sealing ring groove is also arranged on the bottom surface of the mounting step 4.1, and the second sealing ring 7 is also matched in the sealing ring groove. In addition, the first sealing ring 6 and the second sealing ring 7 are positioned on the same horizontal line in the structure. The two sealing rings of the dynamic and static rings are arranged on the same horizontal line, so that the axial force of sealing can be effectively balanced, the deformation of the sealing end face is reduced, and the sealing performance is ensured.
As shown in fig. 3, further, a mounting groove 5.1 is provided on the gland 5, a limiting boss 5.2 is provided on one side of the mounting groove 5.1 close to the rotating shaft 100, the stationary ring seat 4 is assembled in the mounting groove 5.1, and a third sealing ring 8 is provided between the inner side wall of the stationary ring seat 4 and the outer side wall of the limiting boss 5.2. The first seal ring 6, the second seal ring 7, and the third seal ring 8 are located on the same horizontal line.
In this embodiment, the end face of the gland 5 connected to the compressor housing 110 is provided with a compensation component, the end of the stationary ring seat 4 away from the stationary ring 3 is slidably fitted on the gland 5 along the axial direction, and the compensation component is arranged between the bottom of the stationary ring seat 4 and the gland 5. Specifically, the compensation assembly comprises a plurality of springs 16, a plurality of spring holes 5.3 are formed in the bottom of the mounting groove 5.1 along the circumferential direction, one end of each spring 16 is accommodated in each spring hole 5.3, and the other end of each spring 16 abuts against the bottom surface of the static ring seat 4. When the friction surface formed by the movable ring 2 and the static ring 3 generates end surface abrasion in the operation process, the static ring 3 is always attached to the end surface of the movable ring 2 under the action of the elastic force of the spring 16 so as to ensure the sealing performance of the sealing surface.
One end of the shaft sleeve 1 is fitted into the compressor housing 110, and the other end is connected to the rotary shaft 100 through an expansion-type chuck. Specifically, the expansion chuck comprises an expansion sleeve 11, a first clamping ring 12 and a second clamping ring 13, wherein the expansion sleeve 11 is sleeved on the shaft sleeve 1. As shown in fig. 1 and 2, specifically, a notch 11.1 with two ends communicated is axially arranged on the expansion sleeve 11, and an open slot 1.2 is arranged on the shaft sleeve 1 at a position corresponding to the expansion sleeve 11; the first clamping ring 12 and the second clamping ring 13 are fixed to the expansion sleeve 11 by bolts 14. More specifically, conical surfaces are arranged at two ends of the expansion sleeve 11, and correspondingly, conical holes matched with the inclined surfaces at two ends of the expansion sleeve 11 are arranged on the first clamping ring 12 and the second clamping ring 13. Thus, when the first clamping ring 12 and the second clamping ring 13 are connected by the bolt 14, the expansion sleeve 11 is subjected to a clamping force acting towards the center of the inner hole thereof, so that the inner hole thereof is tightly held with the rotating shaft 100.
In addition, one end of the movable ring 2 close to the step ring 1.1 and one end of the static ring 3 close to the installation step 4.1 are both provided with annular bosses 9, and the outer diameters of the annular bosses 9 on the movable ring 2 are slightly larger than the diameter of the outer side wall of the seal ring groove on the step ring 1.1; the outer diameter of the annular boss 9 on the stationary ring 3 is slightly larger than the diameter of the outer side wall of the seal ring groove on the mounting step 4.1. The first sealing ring 6 and the second sealing ring 7 are correspondingly attached to the corresponding annular bosses 9 respectively. The structure enables the dynamic and static rings to effectively balance the sealed axial force after being stressed axially, and reduces the deformation of the sealing end face, thereby ensuring the sealing performance.
in this embodiment, the lateral wall of the one end that the rotating ring 2 and the quiet ring 3 laminated each other all is equipped with big oblique angle, and when the grinding face end cooperation back of rotating ring 2 and quiet ring 3, two big oblique angles form "V" type groove 10.
As shown in fig. 5, the gland 5 is further provided with an annular sleeve 15, the side wall of the annular sleeve 15 is circumferentially provided with a plurality of flushing holes 15.1 for flushing the sealing surface, and the side wall of the gland 5 is provided with a liquid inlet hole 5.2 communicated with the flushing holes 15.1. The outer side wall of the step ring 1.1 is provided with a plurality of annular grooves 1.3 to form a throttling ring, so that the flushing liquid can be throttled and sealed.
In this embodiment, the installation method of the cartridge mechanical seal is as follows: firstly, the movable ring 2 is assembled on a step ring 1.1 of a shaft sleeve 1, then the static ring 3 is assembled on an installation step 4.1 of a static ring seat 4, after the static ring 3 is stably installed, the static ring and the static ring seat 4 are assembled in an installation groove 5.1 of a gland 5, and a spring 16 is pre-installed in a spring hole 5.3 at the bottom of the installation groove 5.1; after the static ring 3, the static ring seat 4 and the gland 5 are assembled, the three are sleeved outside the shaft sleeve 1 together until the end face of the static ring 3 is attached to the end face of the movable ring 2; installing a limiting block 18 to enable the spring 16 to be compressed to a working height, keeping the gland 5 and the shaft sleeve 1 in a relatively static state at the moment, and finally installing an expansion type chuck to enable the expansion sleeve 11 and the shaft sleeve 1 to be connected together.
When a whole set of collection dress formula mechanical seal installs to compressor housing 110 in, as long as with whole mechanical seal along the suit of pivot 100 can, when mechanical seal stretches into corresponding position in casing 110, pass through fastening bolt with gland 5 and casing 110 and be connected fixedly, then screw up the bolt 14 on the tight formula chuck that expands, make the cover 11 chucking that expands outside at axle sleeve 1, because open slot 1.2 has been seted up to the tight position of clamp on axle sleeve 1 again, so under the effect of external clamping force, axle sleeve 1 and pivot 100 fastening connection, treat the installation stable back, pull down stopper 18, deposit alone, use when needing to dismantle or change the mechanical seal.
While the above is directed to the preferred embodiment of the present invention, it is not intended that it be limited, except as by the appended claims. The present invention is not limited to the above embodiments, and the specific structure thereof allows for changes, all the changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.
Claims (9)
1. The utility model provides an open-type high pressure screw compressor is with collection dress formula mechanical seal, includes that the suit is at the outside axle sleeve (1) of pivot (100), the outside cover of axle sleeve (1) is equipped with rotating ring (2), quiet ring (3), quiet ring holder (4) and gland (5), its characterized in that: the movable ring (2), the static ring (3), the static ring seat (4), the gland (5) and the shaft sleeve (1) are assembled into an integral structure; a step ring (1.1) is arranged at one end of the shaft sleeve (1), one end of the movable ring (2) is assembled on the step ring (1.1), and a first sealing ring (6) is arranged between the bottom surface of the movable ring (2) and the step ring (1.1); the fixed ring seat (4) is provided with an installation step (4.1), one end of the fixed ring (3) is assembled on the installation step (4.1), the other end of the fixed ring (3) is attached to the other end of the movable ring (2), a second sealing ring (7) is arranged between one end of the fixed ring (3) close to the installation step (4.1) and the end face of the installation step (4.1), and the first sealing ring (6) and the second sealing ring (7) are located on the same horizontal line; the end face of the gland (5) is connected with the end face of the compressor shell (110), one end of the static ring seat (4) departing from the static ring (3) is assembled on the gland (5) in an axially slidable mode, and a compensation assembly is arranged between the bottom of the static ring seat (4) and the gland (5).
2. The integrated mechanical seal for an open-type high-pressure screw compressor according to claim 1, characterized in that: the sealing structure is characterized in that a mounting groove (5.1) is formed in the gland (5), a limiting boss (5.2) is arranged on one side, close to the rotating shaft (100), of the mounting groove (5.1), the static ring seat (4) is assembled in the mounting groove (5.1), and a third sealing ring (8) is arranged between the inner side wall of the static ring seat (4) and the outer side wall of the limiting boss (5.2).
3. The integrated mechanical seal for an open-type high-pressure screw compressor according to claim 2, characterized in that: the first sealing ring (6), the second sealing ring (7) and the third sealing ring (8) are located on the same horizontal line.
4. The integrated mechanical seal for an open-type high-pressure screw compressor according to claim 1, characterized in that: the movable ring (2) is close to one end of the step ring (1.1) and the stationary ring (3) is close to one end of the mounting step (4.1), and annular bosses (9) are arranged at the ends of the movable ring and the stationary ring, and the first sealing ring (6) and the second sealing ring (7) are respectively correspondingly attached to the corresponding annular bosses (9).
5. The integrated mechanical seal for an open-type high-pressure screw compressor according to claim 4, wherein: the lateral wall of the one end of laminating each other of rotating ring (2) and quiet ring (3) all be equipped with big oblique angle, and after the grinding surface cooperation of rotating ring (2) and quiet ring (3), two big oblique angles formed "V" type groove (10).
6. The integrated mechanical seal for an open-type high-pressure screw compressor according to claim 1, characterized in that: one end of the shaft sleeve (1) is matched in the compressor shell (110), and the other end of the shaft sleeve is connected with the rotating shaft (100) through the expansion type chuck.
7. The integrated mechanical seal for an open-type high-pressure screw compressor according to claim 6, wherein: the expansion chuck comprises an expansion sleeve (11), a first clamping ring (12) and a second clamping ring (13), wherein the expansion sleeve (11) is sleeved on a shaft sleeve (1), the expansion sleeve (11) is axially provided with a notch (11.1) with two communicated ends, and an open slot (1.2) is formed in the position, corresponding to the expansion sleeve (11), of the shaft sleeve (1); the first clamping ring (12) and the second clamping ring (13) are fixed on the expansion sleeve (11) through bolts (14).
8. The integrated mechanical seal for an open-type high-pressure screw compressor according to claim 1, characterized in that: the sealing structure is characterized in that the gland (5) is further provided with an annular sleeve (15), a plurality of flushing holes (15.1) used for flushing the sealing surface are formed in the side wall of the annular sleeve (15) along the circumferential direction, and a liquid inlet hole (5.3) communicated with the flushing holes (15.1) is formed in the side wall of the gland (5).
9. The integrated mechanical seal for an open-type high-pressure screw compressor according to claim 8, wherein: the outer side wall of the step ring (1.1) is provided with a plurality of annular grooves (1.3) to form a throttling ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920159086.0U CN209762246U (en) | 2019-01-29 | 2019-01-29 | Container type mechanical seal for open type high-pressure screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920159086.0U CN209762246U (en) | 2019-01-29 | 2019-01-29 | Container type mechanical seal for open type high-pressure screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209762246U true CN209762246U (en) | 2019-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920159086.0U Active CN209762246U (en) | 2019-01-29 | 2019-01-29 | Container type mechanical seal for open type high-pressure screw compressor |
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| Country | Link |
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| CN (1) | CN209762246U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128097A (en) * | 2020-09-08 | 2020-12-25 | 洛普兰机械设备(宁波)有限公司 | Integrated mechanical seal for industrial cam rotor pump |
-
2019
- 2019-01-29 CN CN201920159086.0U patent/CN209762246U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128097A (en) * | 2020-09-08 | 2020-12-25 | 洛普兰机械设备(宁波)有限公司 | Integrated mechanical seal for industrial cam rotor pump |
| CN112128097B (en) * | 2020-09-08 | 2022-09-20 | 洛普兰机械设备(宁波)有限公司 | Integrated mechanical seal for industrial cam rotor pump |
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