CN215762412U - Mechanical sealing device for slurry pump - Google Patents
Mechanical sealing device for slurry pump Download PDFInfo
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- CN215762412U CN215762412U CN202122346671.1U CN202122346671U CN215762412U CN 215762412 U CN215762412 U CN 215762412U CN 202122346671 U CN202122346671 U CN 202122346671U CN 215762412 U CN215762412 U CN 215762412U
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Abstract
The utility model belongs to the technical field of mechanical sealing, and particularly provides a mechanical sealing device for a slurry pump. Over time, the more accumulation, ultimately leads to failure of the mechanical seal due to loss of compensation. The cleaning and cooling between the static ring and the shaft sleeve are well realized by adopting the component structures such as the water guide sleeve and the like, and the phenomenon of compensation is avoided.
Description
Technical Field
The utility model belongs to the technical field of mechanical sealing, and particularly provides a mechanical sealing device for a slurry pump.
Background
The mechanical seal is a shaft seal device which is kept jointed by one or a plurality of pairs of end faces which slide relatively and are vertical to the shaft under the action of fluid pressure and the elastic force of a compensation mechanism and matched with auxiliary seal to prevent leakage. The slurry pump is a kind of centrifugal pump, and refers to a kind of machinery which increases the energy of solid-liquid mixed medium by means of centrifugal force produced by the rotation of pump impeller, and converts the electric energy into kinetic energy and potential energy of medium. The name slurry pump is a centrifugal pump divided from the perspective of the transport medium. In order to prevent the medium from leaking through a gap between the pump shaft and the pump shell, the mechanical seal is required to be used for blocking, the traditional slurry pump mechanical seal is single-end-face seal, and the leaked process medium is easy to crystallize and then easily remains in an inner hole of a static ring, and the more the process medium is, the more the process medium is accumulated, the failure of the mechanical seal is finally caused due to the loss of the compensation function.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the present invention provides a mechanical sealing device for slurry pump, which comprises a shaft sleeve 1, a gland 2, a first sealing unit and a second sealing unit;
the shaft sleeve 1 is sleeved on the rotating shaft 7;
the first sealing unit is arranged on the periphery of the shaft sleeve 1 and positioned on the medium side, and comprises a movable ring A3 and a static ring A4, wherein the movable ring A3 is connected with the shaft sleeve 1 through a cylindrical pin 5; a medium side push ring 6 is arranged on the outer side of the static ring A4, and a plurality of springs A8 and step pins 9 are connected between the medium side push ring 6 and the gland 2; the medium side push ring 6 is provided with a plurality of through holes, the matched static ring A4 is provided with a plurality of cylindrical grooves, and the gland 2 is provided with a plurality of concave pin grooves in a matching way; the diameter of the cylindrical groove is larger than that of the through hole, the step end of the step pin 9 is arranged in the cylindrical groove, and the head end of the step pin passes through the through hole and is arranged in the recessed pin groove; a spring A8 is arranged in the pin groove without the step pin, one end of a spring A8 is fixed on the medium side push ring 6, the other end of the spring A8 is fixed at the bottom of the recessed pin groove, and the spring A8 and the step pin 9 are alternately arranged to realize transmission, so that the end faces of the movable ring A3 and the static ring A4 are always kept in contact sealing;
the second sealing unit is positioned on the atmosphere side and comprises a static ring B10 and a dynamic ring B11; the outer side of the static ring B10, which is close to the outer peripheral end, is connected with a circle of pressure plate 12, and the pressure plate 12 is fixed on the gland 2 through a screw 13; the movable ring B11 is positioned outside the stationary ring B10, a spring seat 15 is arranged outside the movable ring B11, an accommodating groove is formed in the spring seat 15, a spring B13 is installed in the accommodating groove, an atmospheric side push ring 14 is arranged between the movable ring B11 and the spring seat 15, one end of a spring B13 props against the atmospheric side push ring 14, and the other end of the spring B13 is positioned in the accommodating groove so that the stationary ring B10 and the end face of the movable ring B11 are kept in a contact sealing state; the spring seat 15 is fixedly connected with the shaft sleeve 1 through a set screw 16; the limiting component 17 is provided with a circle of bosses, and the periphery of the spring seat 15 is correspondingly provided with a concave clamping groove; the boss is arranged in the clamping groove, and the limiting component 17 is fixed on the outer side of the pressure plate 12 through a screw 13.
Furthermore, a sealing ring 18 is arranged on the contact surface of the static ring A4 and the gland 2 in an interference fit manner, and a sealing ring 18 is arranged between the shaft sleeve 1 and the rotating shaft 7 in an interference fit manner.
Furthermore, the medium side push ring 6 is close to the side of the static ring a4, a circle of protrusions are arranged at the end part of the outer periphery of the medium side push ring 6, the protrusions are clamped outside the static ring a4, a gap space is formed between the medium side push ring 6 and the shaft sleeve, a gap space is formed between the static ring a4 and the shaft sleeve 1, a water guide sleeve 19 is arranged in the gap space, a protruding part is arranged at one end of the water guide sleeve 19, the protruding part is fixed on the gland 2, the water guide sleeve 19 is located in the middle of the gap space in the radial direction, and two ends of the water guide sleeve 19 in the axial direction are respectively close to the left side and the right side of the gap space; in addition, a cooling liquid inlet hole 20 is arranged on the gland 2, a liquid outlet hole 21 is arranged at the opposite end, cooling liquid enters from the liquid inlet hole 17 and enters the water guide sleeve 19 along the spring A8, flows to the medium end along the atmosphere side end of the water guide sleeve 19 in the axial direction, then flows to the atmosphere side end along the medium end and flows out from the liquid outlet hole 21 at the opposite end through the spring A8.
Further, a sealing ring 22 is arranged between the movable ring B11 and the shaft sleeve 1 in an interference fit manner; and a sealing ring 23 is arranged between the shaft sleeve 1 and the rotating shaft 7 in an interference fit manner.
Furthermore, a ring of buffer sleeves 24 are sleeved on the periphery of the cylindrical pin 5 close to the movable ring A3.
The multi-slag slurry pump has the advantages that the design structure is reasonable, the rotating shaft of the multi-slag slurry pump with good double-end-face sealing is adopted to realize sealing, and the sealing effect is more stable. Over time, the more accumulation, ultimately leads to failure of the mechanical seal due to loss of compensation. The cleaning and cooling between the static ring and the shaft sleeve are well realized by adopting the component structures such as the water guide sleeve and the like, and the phenomenon of compensation is avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1, the present invention provides a mechanical sealing device for a slurry pump, including a shaft sleeve 1, a gland 2, a first sealing unit and a second sealing unit;
the shaft sleeve 1 is sleeved on the rotating shaft 7;
the first sealing unit is arranged on the periphery of the shaft sleeve 1 and positioned on the medium side, and comprises a movable ring A3 and a static ring A4, wherein the movable ring A3 is connected with the shaft sleeve 1 through a cylindrical pin 5; a medium side push ring 6 is arranged on the outer side of the static ring A4, and a plurality of springs A8 and step pins 9 are connected between the medium side push ring 6 and the gland 2; the medium side push ring 6 is provided with a plurality of through holes, the matched static ring A4 is provided with a plurality of cylindrical grooves, and the gland 2 is provided with a plurality of concave pin grooves in a matching way; the diameter of the cylindrical groove is larger than that of the through hole, the step end of the step pin 9 is arranged in the cylindrical groove, and the head end of the step pin passes through the through hole and is arranged in the recessed pin groove; a spring A8 is arranged in a pin groove without a step pin, one end of a spring A8 is fixed on the medium side push ring 6, the other end of the spring A8 is fixed at the bottom of the recessed pin groove, and the spring A8 and the step pin 9 are alternately arranged to realize transmission, so that the end faces of the movable ring A3 and the static ring A4 are always kept in contact sealing.
The second sealing unit is positioned on the atmosphere side and comprises a static ring B10 and a dynamic ring B11; the outer side of the static ring B10, which is close to the outer peripheral end, is connected with a circle of pressure plate 12, and the pressure plate 12 is fixed on the gland 2 through a screw 13; the movable ring B11 is positioned outside the stationary ring B10, a spring seat 15 is arranged outside the movable ring B11, an accommodating groove is formed in the spring seat 15, a spring B13 is installed in the accommodating groove, an atmospheric side push ring 14 is arranged between the movable ring B11 and the spring seat 15, one end of a spring B13 props against the atmospheric side push ring 14, and the other end of the spring B13 is positioned in the accommodating groove so that the stationary ring B10 and the end face of the movable ring B11 are kept in a contact sealing state; the spring seat 15 is fixedly connected with the shaft sleeve 1 through a set screw 16; the limiting component 17 is provided with a circle of bosses, and the periphery of the spring seat 15 is correspondingly provided with a concave clamping groove; the boss is arranged in the clamping groove, and the limiting component 17 is also fixed on the outer side of the pressure plate 12 through the screw 13.
As can be seen from the figure, the two sealing end surfaces of the two sealing units always compensate and maintain the sealing state under the action of the spring, the sealing of the rotating shaft is well realized, and the medium in the slurry pump is prevented from leaking.
In order to better realize the sealing effect, a sealing ring 18 is arranged on the contact surface of the static ring A4 and the gland 2 in an interference fit manner, and a sealing ring 18 is arranged between the shaft sleeve 1 and the rotating shaft 7 in an interference fit manner.
As the improvement of the scheme, in the long-time operation of the slurry pump, leaked process media are easy to cause the inner hole of the static ring to be blocked after being crystallized, and the more the process media are accumulated along with the time, the failure of the mechanical seal is finally caused due to the loss of the compensation function, namely the blockage is caused at the position between the inner side of the radial direction and the shaft sleeve, so that the compensation effect of the spring is influenced and the sealing effect is lost. Because as another embodiment of this scheme, the structural component of the cleaning medium has been added on this seal structure, specifically, the medium side push ring 6 is close to the side of the stationary ring a4, the peripheral end is equipped with a circle of projection, this projection is blocked outside the stationary ring a4, between the medium side push ring 6 and the shaft sleeve, there is a gap space between the stationary ring a4 and the shaft sleeve 1, there is a water guide sleeve 19 in this gap space, one end of this water guide sleeve 19 has a protruding portion, this protruding portion is fixed on the gland 2, make the water guide sleeve 19 locate at the middle of the gap space radially, the two axial ends of the water guide sleeve 19 are close to the left and right sides of the gap space respectively; in addition, a cooling liquid inlet hole 20 is formed in the gland 2, a liquid outlet hole 21 is formed in the opposite end of the gland, cooling liquid enters the water guide sleeve 19 from the liquid inlet hole 17 and flows along the spring A8, flows to the medium end along the atmosphere side end of the water guide sleeve 19 in the axial direction, flows to the atmosphere side end along the medium end, flows out of the liquid outlet hole 21 from the opposite end through the spring A8, and medium residues on the inner side of the static ring can be effectively cleaned, so that a good cooling effect can be achieved.
As an improvement of the scheme, in order to well increase the sealing effect, a sealing ring 22 is arranged between the movable ring B11 and the shaft sleeve 1 in an interference fit manner; and a sealing ring 23 is arranged between the shaft sleeve 1 and the rotating shaft 7 in an interference fit manner.
As a scheme improvement, a circle of buffer sleeves are sleeved on the periphery of the cylindrical pin 5 close to the movable ring A3. Since the pin 5 prevents the movable ring A3 and the shaft sleeve 1 from rotating relatively, the pin 5 and the movable ring A3 are in contact with each other, the movable ring A3 is made of brittle ceramic material, the cylindrical pin 5 is made of metal material, the pin 5 impacts the movable ring A3 during operation starting, and in order to reduce the instantaneous contact force, a circle of buffer sleeves are sleeved on the periphery of the cylindrical pin 5, so that the movable ring A3 is effectively prevented from being crushed.
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 utility model, 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 (5)
1. The utility model provides a mechanical seal device for slurry pump which characterized in that: comprises a shaft sleeve (1), a gland (2), a first sealing unit and a second sealing unit;
the shaft sleeve (1) is sleeved on the rotating shaft (7);
the first sealing unit is arranged on the periphery of the shaft sleeve (1), is positioned on the medium side and comprises a movable ring A (3) and a static ring A (4), and the movable ring A (3) is connected with the shaft sleeve (1) through a cylindrical pin (5); a medium side push ring (6) is arranged on the outer side of the static ring A (4), and a plurality of springs A (8) and step pins (9) are connected between the medium side push ring (6) and the gland (2); the medium side push ring (6) is provided with a plurality of through holes, the matched static ring A (4) is provided with a plurality of cylindrical grooves, and the gland (2) is provided with a plurality of concave pin grooves in a matching manner; the diameter of the cylindrical groove is larger than that of the through hole, the step end of the step pin (9) is arranged in the cylindrical groove, and the head end of the step pin penetrates through the through hole and is arranged in the recessed pin groove; a spring A (8) is arranged in the pin groove without the step pin, one end of the spring A (8) is fixed on the medium side push ring (6), the other end of the spring A (8) is fixed at the bottom of the concave pin groove, and the spring A (8) and the step pin (9) are alternately arranged to realize transmission, so that the end faces of the movable ring A (3) and the static ring A (4) are always kept in contact sealing;
the second sealing unit is positioned on the atmosphere side and comprises a static ring B (10) and a dynamic ring B (11); the outer side of the static ring B (10), which is close to the peripheral end, is connected with a circle of pressure plate (12), and the pressure plate (12) is fixed on the gland (2) through a screw (13); the movable ring B (11) is positioned on the outer side of the fixed ring B (10), a spring seat (15) is arranged on the outer side of the movable ring B (11), an accommodating groove is formed in the spring seat (15), a spring B (13) is installed in the accommodating groove, an atmosphere side push ring (14) is arranged between the movable ring B (11) and the spring seat (15), one end of the spring B (13) is abutted against the atmosphere side push ring (14), and the other end of the spring B (13) is arranged in the accommodating groove so that the end faces of the fixed ring B (10) and the movable ring B (11) are kept in a contact sealing state; the spring seat (15) is fixedly connected with the shaft sleeve (1) through a set screw (16); the limiting component (17) is provided with a circle of boss, and the periphery of the spring seat (15) is correspondingly provided with a concave clamping groove; the boss is arranged in the clamping groove, and the limiting component (17) is fixed on the outer side of the pressure plate (12) through a screw (13).
2. The mechanical seal device for the slurry pump according to claim 1, wherein: a sealing ring (18) is arranged on the contact surface of the static ring A (4) and the gland (2) in an interference fit manner, and a sealing ring (18) is arranged between the shaft sleeve (1) and the rotating shaft (7) in an interference fit manner.
3. The mechanical seal device for the slurry pump according to claim 1, wherein: the medium side push ring (6) is close to the static ring A (4), a circle of protrusions are arranged at the end part of the periphery of the medium side push ring and clamped at the outer side of the static ring A (4), a gap space is formed between the medium side push ring (6) and the shaft sleeve, and a gap space is formed between the static ring A (4) and the shaft sleeve (1), a water guide sleeve (19) is arranged in the gap space, one end of the water guide sleeve (19) is provided with a protruding part which is fixed on the gland (2), so that the water guide sleeve (19) is located in the middle of the gap space in the radial direction, and two ends of the water guide sleeve (19) in the axial direction are respectively close to the left side and the right side of the gap space; and a cooling liquid inlet hole (20) is formed in the gland (2), a liquid outlet hole (21) is formed in the opposite end, cooling liquid enters the position where the cooling liquid enters the water guide sleeve (19) along the spring A (8) from the liquid inlet hole (17), flows to the medium end along the atmosphere side end of the water guide sleeve (19) in the axial direction, then flows to the atmosphere side end along the medium end, passes through the spring A (8) and flows out of the liquid outlet hole (21) in the opposite end.
4. The mechanical seal device for the slurry pump according to claim 1, wherein: a sealing ring (22) is arranged between the movable ring B (11) and the shaft sleeve (1) in an interference fit manner; a sealing ring (23) is arranged between the shaft sleeve (1) and the rotating shaft (7) in an interference fit manner.
5. The mechanical seal device for the slurry pump according to claim 1, wherein: a circle of buffer sleeve (24) is sleeved on the periphery of the cylindrical pin (5) close to the movable ring A (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122346671.1U CN215762412U (en) | 2021-09-27 | 2021-09-27 | Mechanical sealing device for slurry pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122346671.1U CN215762412U (en) | 2021-09-27 | 2021-09-27 | Mechanical sealing device for slurry pump |
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| Publication Number | Publication Date |
|---|---|
| CN215762412U true CN215762412U (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122346671.1U Active CN215762412U (en) | 2021-09-27 | 2021-09-27 | Mechanical sealing device for slurry pump |
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| CN (1) | CN215762412U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116906365A (en) * | 2023-08-17 | 2023-10-20 | 丹东盛欣石化设备制造有限公司 | Mechanical sealing device of horizontal pump |
-
2021
- 2021-09-27 CN CN202122346671.1U patent/CN215762412U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116906365A (en) * | 2023-08-17 | 2023-10-20 | 丹东盛欣石化设备制造有限公司 | Mechanical sealing device of horizontal pump |
| CN116906365B (en) * | 2023-08-17 | 2024-03-15 | 丹东盛欣石化设备制造有限公司 | Mechanical sealing device of horizontal pump |
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