CN212297593U - Mechanical sealing device with exhaust function - Google Patents
Mechanical sealing device with exhaust function Download PDFInfo
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- CN212297593U CN212297593U CN202020577408.6U CN202020577408U CN212297593U CN 212297593 U CN212297593 U CN 212297593U CN 202020577408 U CN202020577408 U CN 202020577408U CN 212297593 U CN212297593 U CN 212297593U
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Abstract
The utility model discloses a mechanical sealing device with exhaust function, which comprises a movable sealing ring mounting component, a movable sealing ring, a static sealing ring, a water end movable ring seat and a fixed positioning component, wherein the movable sealing ring mounting component, the movable sealing ring, the static sealing ring, the water end movable sealing ring and the water end movable ring seat are coaxially arranged from front to back; the movable sealing ring mounting assembly is formed by welding a movable ring seat with a built-in movable sealing ring and a movable ring seat shaft sleeve, and a radial gap and an axial gap communicated with an exhaust hole formed in the movable ring seat are reserved between the ring seat and the outer wall of the movable ring seat shaft sleeve; the static sealing ring is in sealing fit with the dynamic sealing ring; the water end dynamic sealing ring is arranged in the water end dynamic ring seat, and the front end of the water end dynamic sealing ring is tightly attached to the water end static sealing ring; the water end moving ring seat is provided with an exhaust hole; the positioning assembly fixes the components; the device solves the problems of difficult exhaust and large processing difficulty of an exhaust channel in the installation process while ensuring the sealing performance of the device, further prolongs the service life and the mechanism strength, and reduces the production cost of the device.
Description
Technical Field
The utility model relates to a mechanical seal technical field, in particular to mechanical seal device with exhausting function.
Background
Mechanical seal receives the influence of pump chamber and two kinds of pressures of sparge water in use, if the sparge water pressure is too high, can promote the moving seal ring to move to quiet sealing ring department, lead to the too big ring of spring force or even compress the ring, two sealing rings wearing and tearing are serious to cause mechanical seal to reveal.
In order to avoid this phenomenon, it is necessary to install a rubber seal at the lower portion of the movable seal ring so that the flushing pressure cannot act on the movable seal ring. However, in the existing mechanical sealing structure, when the movable sealing ring and the movable ring seat are assembled, the phenomena of difficult installation and improper installation are sometimes caused due to the influence of the upper and lower rubber sealing parts, and two methods are adopted at present. One method is to punch a hole in the driven ring seat and to reach the shaft sleeve of the movable ring seat all the time, so that the problem of exhaust can be solved, but the angle requirement is high during punching, the drill bit is easy to break due to the small depth of the hole, the hole is punched in the inner side of the shaft sleeve of the movable ring seat and is just the matching part with the shaft, the chamfer of the hole opening is not well cleaned, and the surface of the shaft is very easy to scratch during installation and disassembly, as shown in fig. 4; another method is to install only the rubber seal on the movable sealing ring during assembly, and then to fill the rubber seal under the movable sealing ring with a tool after the assembly is completed, which generally results in uneven filling and insignificant effect, as shown in fig. 5.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a solve prior art and move sealing ring exhaust difficulty, and can make the smooth equipment mechanical seal device who targets in place that has the exhausting function of moving sealing ring under the condition that does not harm spare part.
Therefore, the utility model discloses technical scheme as follows:
a mechanical sealing device with an exhaust function comprises a movable sealing ring, a movable sealing ring mounting assembly, a static sealing ring, a positioning assembly, a water end static sealing ring, a water end movable sealing ring and a water end movable ring seat; wherein the content of the first and second substances,
the movable sealing ring mounting assembly consists of a movable ring seat and a movable ring seat shaft sleeve; the end face of the rear end of the automatic ring seat is axially provided with a first annular groove matched with the movable sealing ring, the front end of the movable sealing ring is inserted into the annular groove, and annular sealing element mounting grooves for arranging a first sealing element and a second sealing element are respectively formed between the movable sealing ring and the inner side groove wall and the outer side groove wall of the first annular groove; the movable ring seat is sleeved and fixed on the outer side of the front end of the movable ring seat shaft sleeve, an annular boss is arranged on the inner wall of the front end of the movable ring seat, a radial gap is reserved between the inner wall of the movable ring seat and the outer wall of the movable ring seat shaft sleeve, and an axial gap communicated with the radial gap is reserved between the end surface of the front end of the movable ring seat shaft sleeve and the lower end surface of the annular boss of the movable ring seat; a first exhaust hole communicated with the radial gap is obliquely and upwards formed in the inner side groove wall of the automatic ring seat, so that the first exhaust hole, the axial gap and the radial gap are communicated to form two exhaust channels;
the static sealing ring and the dynamic sealing ring are coaxially arranged, and the front end of the static sealing ring is abutted against the end face of the rear end of the dynamic sealing ring;
the water end static sealing ring, the water end dynamic sealing ring and the water end dynamic ring seat are sequentially sleeved on the outer wall of the rear end of the dynamic ring seat shaft sleeve and are coaxially arranged with the dynamic ring seat; a second annular groove matched with the water end movable sealing ring is axially formed in the end face of the front end of the water end movable ring seat, the front end of the water end movable sealing ring is abutted against the end face of the rear end of the water end static sealing ring, the rear end of the water end movable sealing ring is inserted into the second annular groove of the water end movable ring seat, and annular sealing element mounting grooves for arranging a third sealing element and a fourth sealing element are respectively formed between the inner side groove wall and the outer side groove wall of the second annular groove; a second exhaust hole communicated with the bottom of the second annular groove is formed in the outer wall of the water end movable ring seat and used for exhausting air when the water end movable sealing ring is installed;
the positioning assembly comprises an end cover, a transportation positioning plate, two push rings and a plurality of springs; the end cover is sleeved on the outer sides of the static sealing ring and the water end static sealing ring and is coaxially arranged with the movable ring seat; a plurality of axial positioning holes are uniformly distributed along the peripheral direction of the central through hole of the end cover, and a spring is arranged in each axial positioning hole; the two push rings respectively abut against the rear end face of the static sealing ring and the front end face of the water end static sealing ring, two positioning pins are respectively arranged on the two push rings corresponding to each axial positioning hole in a penetrating manner, the two positioning pins are oppositely arranged and arranged in the spring positioned in the axial positioning hole in a penetrating manner, so that the spring is in a compressed state, and the two ends of the spring respectively abut against the end faces of the two push rings; the transportation positioning plate is sleeved outside the water end static sealing ring and the water end dynamic sealing ring, the front end of the transportation positioning plate is fixed on the end cover, and the rear end of the transportation positioning plate is fixed on the water end dynamic ring seat.
In the mechanical sealing device, the movable sealing ring mounting assembly is welded and fixed by the movable ring seat and the movable ring seat shaft sleeve to form two integrally formed exhaust channels in structural design, and the mechanical sealing device has the advantages of avoiding the problems of high difficulty and difficulty in cleaning of a longer hole forming process; meanwhile, in structural design, the movable ring seat in direct contact with the liquid medium can be made of a material with good corrosion resistance according to the characteristic of contact with the external liquid medium, and the movable ring seat shaft sleeve positioned on the inner side can be made of a common material so as to further save cost under the condition of ensuring sealing performance.
Further, the first sealing element, the second sealing element, the third sealing element, the fourth sealing element, the fifth sealing element and the shaft sealing element are all O-shaped sealing rings.
Furthermore, the distance of a radial gap left between the inner wall of the movable ring seat and the outer wall of the movable ring seat shaft sleeve is 0.1-1 mm, and the axial gap is 0.1-1 mm. The specific set value of the radial clearance and the axial clearance is judged according to the size of the shaft diameter of the mechanical seal, the exhaust function is influenced by too small clearance, the matching precision is poor due to too large clearance, and the service precision and the service life are influenced.
An acute angle included angle formed between the axis of the first exhaust hole and the axis of the movable ring seat is 1-90 degrees; the aperture of the first exhaust hole and the second exhaust hole is 2 mm-10 mm.
Furthermore, a first notch is formed in the front end and the inner wall side of the shaft sleeve of the movable ring seat, a second notch matched with the first notch is formed in the outer wall side of the rear end of the annular boss of the movable ring seat, and the first notch and the second notch are spliced to form a shaft sealing element mounting groove for arranging a shaft sealing element when the movable ring seat is fixed to the outer side of the front end of the shaft sleeve of the movable ring seat. The shaft sealing element has the advantages that the flushing water is prevented from leaking and flowing out of the shaft, and the service life of the shaft is effectively prolonged.
Furthermore, an annular welding positioning boss is arranged on the outer wall of the movable ring seat shaft sleeve, so that a gap required to be reserved can be positioned, the welding precision is improved, the movable ring seat is fixedly welded at the front end of the movable ring seat shaft sleeve, and an axial gap and a radial gap are reserved between the movable ring seat and the movable ring seat; meanwhile, the annular welding positioning boss can also improve the welding strength between the movable ring seat shaft sleeve and the movable ring seat, and is beneficial to welding processing.
Furthermore, an annular groove matched with the inner wall of the water end moving ring seat is formed in the outer wall of the rear end of the moving ring seat shaft sleeve, and a fifth sealing element is arranged in the annular groove.
Furthermore, a plurality of anti-rotation pins for preventing the rotation of the stop seal ring are arranged between the movable ring seat and the movable seal ring, one end of each anti-rotation pin is arranged in the mounting hole of the movable ring seat in an interference manner, and the other end of each anti-rotation pin is inserted into an annular groove axially formed in the end face of the top end of the automatic seal ring; a plurality of anti-rotation pins for preventing the water end dynamic sealing ring from rotating are arranged between the water end dynamic ring seat and the water end dynamic sealing ring, one end of each anti-rotation pin is arranged in a mounting hole of the water end dynamic ring seat in an interference manner, and the other end of each anti-rotation pin is inserted into an annular groove which is formed in the bottom end face of the water end dynamic sealing ring along the axial direction.
Furthermore, a fixing screw hole is formed in the end cover, so that the transportation positioning plate is fixedly connected with the end cover through a bolt.
Furthermore, a fixing screw hole is formed in the water end movable ring seat, and a movable ring seat shaft sleeve and the water end movable ring seat are fixedly connected through a bolt.
Furthermore, the outer wall and the inner wall of the front end of the end cover are respectively provided with an annular groove with a built-in sealing element, so that sealing is formed between the outer wall of the front end of the end cover and the inner wall of the adjacent measurement component, and sealing is formed between the inner wall of the front end of the end cover and the outer wall of the static sealing ring.
Compared with the prior art, the mechanical sealing device with the exhaust function has the advantages that:
(1) the air exhaust channel is arranged at the reasonable positions of the movable sealing ring mounting assembly and the water end movable ring seat, so that the problem of difficult mounting caused by difficult air exhaust in the mounting process is solved, and the sealing performance of the device cannot be influenced in structural design;
(2) the movable sealing ring mounting assembly is welded and fixed into a whole by the movable ring seat and a movable ring seat shaft sleeve provided with a welding positioning table, so that the problem of high processing difficulty of a longer exhaust duct is solved, meanwhile, the movable sealing ring seat can be made of high-cost materials with strong corrosion resistance according to the specific contact with an external liquid medium, and the movable sealing ring seat shaft sleeve is made of common materials, so that the cost is further saved under the condition of not influencing the sealing performance; and the design of welding position platform on the rotating ring seat shaft sleeve can position the clearance that needs to remain, improves the welding precision, also improves the welding strength between the two simultaneously, also does benefit to welding process.
Drawings
Fig. 1 is a schematic structural view of a mechanical sealing device with an air exhaust function according to the present invention;
fig. 2 is a schematic structural view of the movable sealing ring of the mechanical sealing device with an air exhaust function of the present invention mounted on the movable sealing ring mounting assembly;
fig. 3 is a schematic structural view of a water-end movable ring seat of the mechanical sealing device with an air exhaust function according to the present invention;
FIG. 4 is a first improvement of the prior art mechanical seal to solve the problem of difficult installation;
fig. 5 is a second modification of the prior art mechanical seal device to solve the problem of difficult installation.
Detailed Description
The present invention will be further described with reference to the following drawings and specific examples, but the following examples are by no means limiting the present invention. For convenience of explanation and explanation, the term "tip" referred to in the description of the embodiment specifically means an end of the mechanical seal device having an air-bleeding function adjacent to the pump protector 18 when mounted on the boss 19, and "rear end" specifically means an end away from the pump protector 18.
As shown in fig. 1 to 3, the mechanical sealing device with the air exhaust function is sleeved on the shaft sleeve 19 and seals one end of an annular chamber formed between the shaft sleeve 19 and the pump guard 18 of the agitator, so as to prevent external liquid medium from flowing into the annular chamber formed between the shaft sleeve 19 and the pump guard 18; the mechanical sealing device with the exhaust function specifically comprises a movable sealing ring 3, a movable sealing ring mounting assembly, a static sealing ring 4, a positioning assembly, a water end static sealing ring 13, a water end movable sealing ring 14 and a water end movable ring seat 16; wherein the content of the first and second substances,
the movable sealing ring mounting assembly consists of a movable ring seat 1 and a movable ring seat shaft sleeve 2; a first annular groove matched with the movable sealing ring 3 is axially formed in the end face of the rear end of the automatic ring seat 1, the front end of the movable sealing ring 3 is inserted into the annular groove, and annular sealing element mounting grooves for mounting a first sealing element 5 and a second sealing element 6 are respectively formed between the movable sealing ring 3 and the inner side groove wall and the outer side groove wall of the first annular groove;
meanwhile, a plurality of anti-rotation pins 8 for preventing the rotation of the stop seal ring 3 are arranged between the movable ring seat 1 and the movable seal ring 3, one end of each anti-rotation pin 8 is arranged in a mounting hole of the movable ring seat 1 in an interference manner, and the other end of each anti-rotation pin 8 is inserted into an annular groove axially formed in the end face of the top end of the automatic seal ring 3;
the movable ring seat 1 is sleeved and fixed on the outer side of the front end of the movable ring seat shaft sleeve 2, an annular boss is arranged on the inner wall of the front end of the movable ring seat 1, a radial gap is reserved between the inner wall of the movable ring seat 1 and the outer wall of the movable ring seat shaft sleeve 2, and an axial gap communicated with the radial gap is reserved between the end surface of the front end of the movable ring seat shaft sleeve 2 and the lower end surface of the annular boss of the movable ring seat 1; a first exhaust hole 7 communicated with the radial gap is formed in the inner side groove wall of the automatic ring seat 1 in an upward inclined mode;
the static sealing ring 4 and the dynamic sealing ring 3 are coaxially arranged, and the front end of the static sealing ring abuts against the end face of the rear end of the dynamic sealing ring 3 to form close fit;
specifically, the distance H of the radial gap left between the inner wall of the moving ring seat 1 and the outer wall of the moving ring seat shaft sleeve 21Is 0.15mm, and has an axial clearance H2Is 0.3 mm; an acute angle formed between the axis of the first exhaust hole 7 and the axis of the movable ring seat 1 is 45 degrees; the first venting holes 7 have a hole diameter of 3 mm.
A first notch is formed in the front end and the inner wall side of the movable ring seat shaft sleeve 2, a second notch matched with the first notch is formed in the outer wall side of the rear end of the annular boss of the movable ring seat 1, and the first notch and the second notch are spliced to form a shaft sealing element mounting groove for arranging a shaft sealing element 20 when the movable ring seat 1 is fixed on the outer side of the front end of the movable ring seat shaft sleeve 2;
as a preferred technical scheme of this embodiment, an annular welding positioning boss is provided on the outer wall of the moving ring base shaft sleeve 2, so that the annular welding positioning boss is in full-welding connection with the lower end face of the moving ring base 1, and an axial gap and a radial gap formed after the two are welded are kept to be consistent with a preset numerical value;
the water end static sealing ring 13, the water end dynamic sealing ring 14 and the water end dynamic ring seat 16 are sequentially sleeved on the outer wall of the rear end of the dynamic ring seat shaft sleeve 2 and are coaxially arranged with the dynamic ring seat 1; a second annular groove matched with the water end movable sealing ring 14 is axially formed in the end face of the front end of the water end movable ring seat 16, so that the front end of the water end movable sealing ring 14 abuts against the end face of the rear end of the water end static sealing ring 13 to form close fit, the rear end of the water end movable sealing ring is inserted into the second annular groove of the water end movable ring seat 16, and annular sealing element mounting grooves for arranging a third sealing element 21 and a fourth sealing element 22 are respectively formed between the inner side groove wall and the outer side groove wall of the second annular groove and the water end movable sealing ring 14;
meanwhile, a plurality of anti-rotation pins for preventing the water end movable sealing ring 14 from rotating are arranged between the water end movable ring seat 16 and the water end movable sealing ring 14, one end of each anti-rotation pin is arranged in a mounting hole of the water end movable ring seat 16 in an interference mode, and the other end of each anti-rotation pin is inserted into an annular groove formed in the bottom end face of the water end movable sealing ring 14 along the axial direction.
A second exhaust hole 1601 communicated with the bottom of the second annular groove is formed in the outer wall of the water end moving ring seat 16; specifically, the aperture of the second exhaust hole 1601 is identical to the aperture of the second exhaust hole 7, and is ____ mm; in addition, an annular groove matched with the inner wall of the water end moving ring seat 16 is formed in the outer wall of the rear end of the moving ring seat shaft sleeve 2, and a fifth sealing element 23 is arranged in the annular groove;
the water end moving ring seat 16 is provided with radial fixed screw holes, so that the water end moving ring seat 16 is sequentially fixed on the moving ring seat shaft sleeve 2 and the shaft sleeve 19 through bolts arranged in the radial fixed screw holes, the water end moving ring seat 16 drives the water end moving sealing ring 14 to rotate along with the pump shaft, and meanwhile, the moving ring seat 1 fixedly connected with the moving ring seat shaft sleeve 2 also drives the moving sealing ring 3 to rotate along with the pump shaft;
the positioning assembly comprises an end cover 10, a transportation positioning plate 15, two push rings 11 and a plurality of springs 12; wherein the content of the first and second substances,
the end cover 10 is sleeved on the outer sides of the static sealing ring 4 and the water end static sealing ring 13 and is coaxially arranged with the movable ring seat 1; a plurality of axial positioning holes are uniformly distributed along the peripheral direction of the central through hole of the end cover 10, and a spring 12 is arranged in each axial positioning hole; the two push rings 11 respectively abut against the rear end face of the static sealing ring 4 and the front end face of the water end static sealing ring 13, two positioning pins 17 are respectively arranged on the two push rings 11 corresponding to each axial positioning hole in a penetrating manner, the two positioning pins 17 are oppositely arranged and arranged in the spring 12 positioned in the axial positioning hole in a penetrating manner, so that the spring 12 is in a compressed state, and the two ends of the spring are respectively abutted against the end faces of the two push rings 11;
the front end of the end cover 10 is arranged on the inner side of the rear end of the pump guard plate 18, and the outer wall and the inner wall of the end cover 10 are respectively provided with an annular groove in which a sealing element is arranged, so that sealing is formed between the outer wall of the front end of the end cover 10 and the inner wall of the pump guard plate 18, and sealing is formed between the inner wall of the front end of the end cover 10 and the outer wall of the static sealing ring 4; an annular groove with a built-in sealing element is formed in the inner wall of the rear end of the end cover 10, so that sealing is formed between the inner wall of the rear end of the end cover 10 and the outer wall of the water end static sealing ring 13.
The transportation locating plate 15 suit is in the outside of water end static seal ring 13 and water end dynamic seal ring 14, has all seted up fixed screw on the end cover 10, makes the front end of transportation locating plate 15 pass through the bolt fastening on end cover 10, is equipped with annular boss on the rear end inner wall of transportation locating plate 15, makes transportation locating plate 15 fix on water end dynamic ring seat 16 through embedding annular groove on seting up in water end dynamic ring seat 16 outer wall with its annular boss.
The first sealing element 5, the second sealing element 6, the shaft sealing element 20, the third sealing element 21, the fourth sealing element 22 and the fifth sealing element 23 are all O-shaped sealing rings;
the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A mechanical sealing device with an exhaust function is characterized by comprising a movable sealing ring (3), a movable sealing ring mounting assembly, a static sealing ring (4), a positioning assembly, a water end static sealing ring (13), a water end movable sealing ring (14) and a water end movable ring seat (16); wherein the content of the first and second substances,
the movable sealing ring mounting assembly consists of a movable ring seat (1) and a movable ring seat shaft sleeve (2); a first annular groove matched with the movable sealing ring (3) is axially formed in the end face of the rear end of the automatic ring seat (1), the front end of the movable sealing ring (3) is inserted into the annular groove, and annular sealing element mounting grooves for arranging a first sealing element (5) and a second sealing element (6) are respectively formed between the movable sealing ring (3) and the inner side groove wall and the outer side groove wall of the first annular groove; the movable ring seat (1) is sleeved and fixed on the outer side of the front end of the movable ring seat shaft sleeve (2), an annular boss is arranged on the inner wall of the front end of the movable ring seat (1), a radial gap is reserved between the inner wall of the movable ring seat (1) and the outer wall of the movable ring seat shaft sleeve (2), and an axial gap communicated with the radial gap is reserved between the end surface of the front end of the movable ring seat shaft sleeve (2) and the lower end surface of the annular boss of the movable ring seat (1); a first exhaust hole (7) communicated with the radial gap is formed in the inner side groove wall of the automatic ring seat (1) in an upward inclined mode; the static sealing ring (4) and the dynamic sealing ring (3) are coaxially arranged, and the front end of the static sealing ring is abutted against the end surface of the rear end of the dynamic sealing ring (3);
the water end static sealing ring (13), the water end dynamic sealing ring (14) and the water end dynamic ring seat (16) are sequentially sleeved on the outer wall of the rear end of the dynamic ring seat shaft sleeve (2) and are coaxially arranged with the dynamic ring seat (1); a second annular groove matched with the water end movable sealing ring (14) is axially formed in the end face of the front end of the water end movable ring seat (16), the front end of the water end movable sealing ring (14) abuts against the end face of the rear end of the water end static sealing ring (13), the rear end of the water end movable sealing ring is inserted into the second annular groove of the water end movable ring seat (16), and annular sealing element mounting grooves for arranging a third sealing element (21) and a fourth sealing element (22) are respectively formed between the water end movable sealing ring (14) and the inner side groove wall and the outer side groove wall of the second annular groove; a second exhaust hole (1601) communicated with the bottom of the second annular groove is formed in the outer wall of the water end movable ring seat (16);
the positioning assembly comprises an end cover (10), a transportation positioning plate (15), two push rings (11) and a plurality of springs (12); the end cover (10) is sleeved on the outer sides of the static sealing ring (4) and the water end static sealing ring (13) and is coaxially arranged with the movable ring seat (1); a plurality of axial positioning holes are uniformly distributed along the peripheral direction of the central through hole of the end cover (10), and a spring (12) is arranged in each axial positioning hole; the two push rings (11) are respectively abutted against the rear end face of the static sealing ring (4) and the front end face of the water end static sealing ring (13), two positioning pins (17) are respectively arranged on the two push rings (11) corresponding to each axial positioning hole in a penetrating manner, the two positioning pins (17) are oppositely arranged and arranged in the spring (12) positioned in the axial positioning hole in a penetrating manner, so that the spring (12) is in a compressed state, and the two ends of the spring are respectively abutted against the end faces of the two push rings (11); the transportation positioning plate (15) is sleeved on the outer sides of the water end static sealing ring (13) and the water end dynamic sealing ring (14), the front end of the transportation positioning plate is fixed on the end cover (10), and the rear end of the transportation positioning plate is fixed on the water end dynamic ring seat (16).
2. The mechanical sealing device with the exhaust function according to claim 1, wherein a radial gap between the inner wall of the moving ring seat (1) and the outer wall of the moving ring seat shaft sleeve (2) is 0.1-1 mm, and an axial gap is 0.1-1 mm.
3. The mechanical sealing device with the exhaust function according to claim 1, wherein an acute included angle formed between the axis of the first exhaust hole (7) and the axis of the movable ring seat (1) is 1-90 degrees; the aperture of the first exhaust hole (7) and the aperture of the second exhaust hole (1601) are 2 mm-10 mm.
4. The mechanical sealing device with the exhaust function according to claim 1, wherein a first notch is formed in the front end and the inner wall side of the movable ring seat shaft sleeve (2), a second notch matched with the first notch is formed in the rear end outer wall side of the annular boss of the movable ring seat (1), and when the movable ring seat (1) is fixed on the outer side of the front end of the movable ring seat shaft sleeve (2), the first notch and the second notch are spliced to form a shaft sealing element mounting groove for arranging the shaft sealing element (20).
5. The mechanical sealing device with the exhaust function according to claim 1, wherein an annular welding positioning boss is arranged on the outer wall of the movable ring seat shaft sleeve (2), so that the movable ring seat (1) is welded and fixed at the front end of the movable ring seat shaft sleeve (2) and an axial gap and a radial gap are kept between the movable ring seat shaft sleeve and the movable ring seat shaft sleeve.
6. The mechanical sealing device with the exhaust function according to claim 1, wherein an annular groove matched with the inner wall of the water-end moving ring seat (16) is formed in the outer wall of the rear end of the moving ring seat shaft sleeve (2), and a fifth sealing element (23) is arranged in the annular groove.
7. The mechanical sealing device with the exhaust function according to claim 1, wherein a plurality of anti-rotation pins (8) for preventing the rotation of the movable sealing ring (3) are arranged between the movable ring seat (1) and the movable sealing ring (3), one end of each anti-rotation pin (8) is arranged in a mounting hole of the movable ring seat (1) in an interference manner, and the other end of each anti-rotation pin (8) is inserted into an annular groove axially formed in the end surface of the top end of the automatic sealing ring (3); a plurality of anti-rotation pins for preventing the water end rotating seal ring (14) from rotating are arranged between the water end rotating ring seat (16) and the water end rotating seal ring (14), one end of each anti-rotation pin is arranged in a mounting hole of the water end rotating ring seat (16) in an interference manner, and the other end of each anti-rotation pin is inserted into an annular groove which is formed in the bottom end face of the water end rotating seal ring (14) along the axial direction.
8. The mechanical sealing device with the exhaust function according to claim 1, wherein a fixing screw hole is formed on the end cover (10) so that the transportation positioning plate (15) and the end cover (10) are fixed through bolt connection.
9. The mechanical sealing device with the exhaust function as claimed in claim 1, wherein a fixing screw hole is formed on the water end moving ring seat (16), and the moving ring seat shaft sleeve (2) and the water end moving ring seat (16) are fixedly connected through a bolt.
10. The mechanical sealing device with the exhaust function according to claim 1, wherein the outer wall and the inner wall of the front end of the end cover (10) are respectively provided with an annular groove with a built-in sealing element, so that the outer wall of the front end and the inner wall of the adjacent component form a seal, and the inner wall of the front end and the outer wall of the static sealing ring (4) form a seal; an annular groove with a built-in sealing element is formed in the inner wall of the rear end of the end cover (10), so that sealing is formed between the inner wall of the rear end of the end cover (10) and the outer wall of the water end static sealing ring (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020577408.6U CN212297593U (en) | 2020-04-17 | 2020-04-17 | Mechanical sealing device with exhaust function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020577408.6U CN212297593U (en) | 2020-04-17 | 2020-04-17 | Mechanical sealing device with exhaust function |
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| Publication Number | Publication Date |
|---|---|
| CN212297593U true CN212297593U (en) | 2021-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020577408.6U Active CN212297593U (en) | 2020-04-17 | 2020-04-17 | Mechanical sealing device with exhaust function |
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| CN (1) | CN212297593U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357187A (en) * | 2021-05-18 | 2021-09-07 | 天津市合润科技有限责任公司 | Combined mechanical sealing device for pump shaft of large dredge pump |
-
2020
- 2020-04-17 CN CN202020577408.6U patent/CN212297593U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357187A (en) * | 2021-05-18 | 2021-09-07 | 天津市合润科技有限责任公司 | Combined mechanical sealing device for pump shaft of large dredge pump |
| CN113357187B (en) * | 2021-05-18 | 2024-05-24 | 天津市合润科技有限责任公司 | Combined mechanical sealing device for pump shaft of large dredge pump |
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