CN220646282U - Centrifugal slurry pump rotating shaft mechanical seal with sand accumulation preventing structure - Google Patents
Centrifugal slurry pump rotating shaft mechanical seal with sand accumulation preventing structure Download PDFInfo
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- CN220646282U CN220646282U CN202322360996.4U CN202322360996U CN220646282U CN 220646282 U CN220646282 U CN 220646282U CN 202322360996 U CN202322360996 U CN 202322360996U CN 220646282 U CN220646282 U CN 220646282U
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- 239000004576 sand Substances 0.000 title claims abstract description 172
- 239000002002 slurry Substances 0.000 title claims abstract description 23
- 238000009825 accumulation Methods 0.000 title claims abstract description 21
- 230000003068 static effect Effects 0.000 claims abstract description 135
- 230000000903 blocking effect Effects 0.000 claims abstract description 132
- 238000007789 sealing Methods 0.000 claims abstract description 120
- 239000000498 cooling water Substances 0.000 claims abstract description 14
- 230000002265 prevention Effects 0.000 claims description 14
- 239000007769 metal material Substances 0.000 claims description 2
- 229910052755 nonmetal Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 17
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 239000002131 composite material Substances 0.000 description 3
- 239000011152 fibreglass Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a centrifugal slurry pump rotating shaft mechanical seal with a sand accumulation preventing structure, which comprises a movable ring, a movable ring mounting seat, a shaft sleeve, a stationary ring seat, a stationary ring spring, a seal box, an atmosphere end seal assembly, a cooling water outlet and a cooling water inlet; the movable ring seal ring and the static ring seal ring are also arranged; the engagement part between the periphery of the stationary ring and the stationary ring seat is provided with a sand blocking sealing ring, and the sand blocking sealing ring is provided with at least one sand blocking skirt. The beneficial effects of the utility model are as follows: the sand accumulation preventing structure is specifically a sand blocking sealing ring with an annular skirt edge, wherein the sand blocking sealing ring is arranged between a static ring and a static ring seat of the machine seal, the annular skirt edge of the sand blocking sealing ring is used for blocking sand grains from entering gaps between the static ring and the static ring seat, so that the static ring of the machine seal cannot be stopped by the sand grains, the axial displacement of the static ring of the machine seal cannot be blocked, the static ring has good axial compensation capacity, and further the reliability of the machine seal is improved.
Description
Technical Field
The utility model belongs to the technical field of machinery, and particularly relates to a centrifugal slurry pump rotating shaft mechanical seal with a sand accumulation preventing structure arranged in a gap between a static ring and a static ring seat.
Background
Centrifugal slurry pumps are commonly used in the industry for conveying slurry containing solid phase materials, and shaft seals of the centrifugal slurry pumps are commonly used as built-in mechanical seals, and the built-in mechanical seals have the advantages that: the centrifugal direction of the rotation of the mechanical seal ring is opposite to the leakage direction of the fluid, so that the built-in mechanical seal has a better leakage prevention function.
As shown in fig. 1, a certain gap is usually reserved between a static ring and a static ring seat at the medium end of the built-in mechanical seal, and the purpose of the reserved gap is to ensure that the static ring of the mechanical seal can axially displace under the thrust of a spring to compensate the pressing force after abrasion of a sealing surface and ensure the sealing degree of the working surface of the mechanical seal. However, when the pump is stopped or operated, sand grains in slurry in the pump cavity can be deposited in a gap between a static ring and a static ring seat of the machine seal, the static ring of the machine seal can be blocked, the working face of the machine seal loses compensation capability, the axial displacement capability of the static ring is influenced, and the safety and reliability of the machine seal are greatly reduced. This problem has long existed and no better solution is currently found in the industry.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provides a centrifugal slurry pump rotating shaft mechanical seal with a sand accumulation preventing structure arranged in a gap between a static ring and a static ring seat.
This kind of centrifugal slurry pump pivot mechanical seal of sand accumulation structure is prevented in area includes: the device comprises a movable ring, a movable ring mounting seat, a shaft sleeve, a stationary ring seat, a stationary ring spring, a sealing box, an atmosphere end sealing combination, a cooling water outlet and a cooling water inlet; the movable ring seal ring and the static ring seal ring are also arranged; the engagement part between the periphery of the stationary ring and the stationary ring seat is provided with a sand blocking sealing ring, and the sand blocking sealing ring is provided with at least one sand blocking skirt.
Preferably, the sand blocking skirt is a flat and thin ring, is arranged on one side of the sand blocking sealing ring, which is close to the static ring seat, and can be clung to the static ring seat under the pressure of fluid due to the flexibility of the flat and thin sand blocking skirt, so that sand in the fluid is prevented from entering gaps between the static ring and the static ring seat.
Preferably, the two sand blocking skirts are flat and thin annular, and the included angle between the planes of the two sand blocking skirts is 70-120 degrees; one of the sand blocking skirt edges is arranged on one side, close to the static ring seat, of the sand blocking sealing ring, and the other sand blocking skirt edge is arranged on one side, close to the static ring, of the sand blocking sealing ring, and under the pressure of fluid, as the flat and thin sand blocking skirt edge has flexibility, the sand blocking skirt edge can be clung to the static ring seat and the static ring, and sand in the fluid is prevented from entering gaps between the static ring and the static ring seat.
Preferably, the sand blocking skirt edge is one, the sand blocking skirt edge is a lip conical radial skirt edge, one end of the lip conical radial skirt edge is thick, the other end of the lip conical radial skirt edge is thin, and the thin end of the lip conical radial skirt edge is conical, so that the sand blocking performance of the skirt edge is improved; the lip conical radial skirt is arranged along the radial direction of the static ring and is clung to the static ring seat.
Preferably, the two sand blocking skirts are a lip conical axial skirt and a lip conical radial skirt, one end of the lip conical axial skirt and one end of the lip conical radial skirt are thick and the other end of the lip conical axial skirt is thin, the thin end is conical, the plane included angle of the two skirts is 70-120 degrees, and the sand blocking performance of the skirts is improved; the lip conical axial skirt is arranged along the axial direction of the static ring and is clung to the static ring, and the lip conical radial skirt is arranged along the radial direction of the static ring and is clung to the static ring seat; the lip conical axial skirt prevents sand grains from entering a gap between the static ring and the static ring seat from a gap between the sealing ring and the periphery of the static ring.
Preferably, the sand blocking skirt edge is a reverse buckling lantern ring-shaped skirt edge, the reverse buckling lantern ring-shaped skirt edge is arranged on the sand blocking sealing ring and is close to one side of the static ring seat, a bulge matched with the reverse buckling end part of the reverse buckling lantern ring-shaped skirt edge in shape is arranged on the static ring seat, the reverse buckling end part of the reverse buckling lantern ring-shaped skirt edge is buckled with the bulge on the static ring seat, one side of the sand blocking sealing ring is reversely buckled on the static ring seat, the sealing ring is enabled to have certain negative pressure resistance, the intermittent negative pressure suction of fluid in the pump cavity is prevented from sucking the skirt edge of the sand blocking sealing ring, and sand cannot enter a gap between the static ring and the static ring seat.
Preferably, the two sand blocking skirts are arranged; the sand blocking skirt is a back-buckled lantern ring-shaped skirt, the back-buckled lantern ring-shaped skirt is arranged on one side of the sand blocking sealing ring, which is close to the static ring seat, a bulge matched with the shape of the back-buckled end part of the back-buckled lantern ring-shaped skirt is arranged on the static ring seat, the back-buckled end part of the back-buckled lantern ring-shaped skirt is buckled with the bulge on the static ring seat, one side of the sand blocking sealing ring is back-buckled on the static ring seat, the sealing ring has certain negative pressure resistance, and the intermittent negative pressure suction of fluid in the pump cavity is prevented from sucking the skirt of the sand blocking sealing ring, so that sand grains cannot enter a gap between the static ring and the static ring seat; the other sand blocking skirt edge is a lip conical axial skirt edge, one end of the lip conical axial skirt edge is thick, the other end of the lip conical axial skirt edge is thin, the thin end of the lip conical axial skirt edge is conical, the lip conical axial skirt edge is arranged along the axial direction of the static ring in a close fit manner, the plane included angle of the two skirt edges is 70-120 degrees, and the sand blocking performance of the skirt edges is improved.
Preferably, the sand blocking skirt edge is a reverse buckling lantern ring-shaped skirt edge, the reverse buckling lantern ring-shaped skirt edge is arranged on one side, close to the sealing box, of the sand blocking sealing ring, a bulge matched with the reverse buckling end part of the reverse buckling lantern ring-shaped skirt edge in shape is arranged on the sealing box, the reverse buckling end part of the reverse buckling lantern ring-shaped skirt edge is buckled with the bulge on the sealing box, one side of the sand blocking sealing ring is reversely buckled on the sealing box, the sealing ring has certain negative pressure resistance, the intermittent negative pressure suction of fluid in the pump cavity is prevented from sucking the skirt edge of the sand blocking sealing ring, and sand cannot enter a gap between the static ring and the static ring seat.
Preferably, the two sand blocking skirts are arranged; the sand blocking sealing ring is characterized in that one sand blocking skirt is a reverse buckling lantern ring-shaped skirt, the reverse buckling lantern ring-shaped skirt is arranged on one side, close to the sealing box, of the sand blocking sealing ring, a bulge matched with the reverse buckling end part of the reverse buckling lantern ring-shaped skirt in shape is arranged on the sealing box, the reverse buckling end part of the reverse buckling lantern ring-shaped skirt is buckled with the bulge on the sealing box, one side of the sand blocking sealing ring is reversely buckled on the sealing box, the sealing ring has certain negative pressure resistance, the skirt of the intermittent negative pressure suction sand blocking sealing ring of fluid in the pump cavity is prevented, and sand cannot enter a gap between the static ring and the static ring seat; the other sand blocking skirt edge is a lip conical axial skirt edge, one end of the lip conical axial skirt edge is thick and the other end of the lip conical axial skirt edge is thin, the thin end of the lip conical axial skirt edge is conical, the lip conical axial skirt edge is arranged along the axial direction of the static ring in a close fit manner, the plane included angle of the two skirt edges is 70-120 degrees, and the sand blocking performance of the skirt edges is improved.
Preferably, the sand blocking sealing ring is made of non-metal material with elasticity; the sand blocking sealing ring is of an annular structure and is arranged around a gap between the periphery of the static ring and the static ring seat.
The beneficial effects of the utility model are as follows:
the sand accumulation preventing structure is arranged in a gap between the static ring and the static ring seat in the built-in mechanical seal, and is specifically a sand blocking sealing ring with an annular skirt edge, which is arranged between the static ring and the static ring seat of the mechanical seal, wherein the annular skirt edge of the sand blocking sealing ring is used for blocking sand grains from entering the gap between the static ring and the static ring seat, so that the static ring of the mechanical seal cannot be blocked by the sand grains, the axial displacement of the static ring of the mechanical seal cannot be blocked, the static ring has good axial compensation capability, and the reliability of the mechanical seal is improved.
Drawings
FIG. 1 is a schematic diagram of a gap between a stationary ring and a stationary ring seat at a built-in mechanical seal medium end in the prior art;
FIG. 2 is a schematic illustration of a sand blocking seal ring disposed between a mechanically sealed stationary ring and a stationary ring seat;
FIG. 3 is a schematic view of a sand retaining seal ring with a lip tapered radial skirt;
FIG. 4 is a schematic view of a sand retaining seal ring with a lip tapered axial skirt and a lip tapered radial skirt;
FIG. 5 is a schematic view of a sand seal ring with a radial reverse buckle annular skirt;
FIG. 6 is a schematic view of a sand retaining seal with a lip tapered axial skirt and a radial counter-buckling skirt.
Reference numerals illustrate: the sealing device comprises a movable ring 1, a shaft sleeve 2, a movable ring mounting seat 2.1, a stationary ring 3, a stationary ring seat 4, a bulge 4.1, a stationary ring spring 5, a sealing box 6, an atmosphere end sealing combination 7, a cooling water outlet 8, a cooling water inlet 9, a sand blocking sealing ring 10, a lip conical radial skirt 10.1, a lip conical axial skirt 10.2, a back-buckling collar-shaped skirt 10.3, a movable ring sealing ring 11 and a stationary ring sealing ring 12.
Detailed Description
The utility model is further described below with reference to examples. The following examples are presented only to aid in the understanding of the utility model. It should be noted that it will be apparent to those skilled in the art that modifications can be made to the present utility model without departing from the principles of the utility model, and such modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Example 1
A centrifugal slurry pump shaft mechanical seal with sand accumulation prevention structure, comprising: the sealing device comprises a movable ring 1, a movable ring mounting seat 2.1, a shaft sleeve 2, a stationary ring 3, a stationary ring seat 4, a stationary ring spring 5, a sealing box 6 (glass fiber reinforced plastic or stainless steel), an atmosphere end sealing combination 7, a cooling water outlet 8 and a cooling water inlet 9; a movable ring seal 11 and a static ring seal 12 are also arranged; the engaging part between the periphery of the stationary ring 3 and the stationary ring seat 4 is provided with a sand blocking sealing ring 10 (rubber, plastic and rubber-plastic composite material), and at least one sand blocking skirt is arranged on the sand blocking sealing ring 10. The sand blocking skirt edge is a flat and thin ring, is arranged on one side of the sand blocking sealing ring 10, which is close to the static ring seat 4, and can be clung to the static ring seat under the pressure of fluid because of the flexibility of the flat and thin sand blocking skirt edge, so that sand in the fluid is prevented from entering gaps between the static ring and the static ring seat; the sand blocking sealing ring 10 is of an annular structure and is arranged around a gap between the periphery of the static ring 3 and the static ring seat 4.
Example 2
On the basis of the embodiment 1, the two sand blocking skirts are flat and thin annular, and the plane included angle of the two skirts is 70 degrees; one sand blocking skirt edge is arranged on one side of the sand blocking sealing ring 10, which is close to the static ring seat 4, and the other sand blocking skirt edge is arranged on one side of the sand blocking sealing ring 10, which is close to the static ring 3, and under the pressure of fluid, as the flat and thin sand blocking skirt edge has flexibility, the sand blocking skirt edge can be tightly attached to the static ring seat and the static ring, so that sand in the fluid is prevented from entering a gap between the static ring and the static ring seat; the remainder of this example is the same as example 1.
Example 3
A centrifugal slurry pump shaft mechanical seal with sand accumulation prevention structure, comprising: the sealing device comprises a movable ring 1, a movable ring mounting seat 2.1, a shaft sleeve 2, a stationary ring 3, a stationary ring seat 4, a stationary ring spring 5, a sealing box 6 (glass fiber reinforced plastic or stainless steel), an atmosphere end sealing combination 7, a cooling water outlet 8 and a cooling water inlet 9; a movable ring seal 11 and a static ring seal 12 are also arranged; the engagement part between the periphery of the stationary ring 3 and the stationary ring seat 4 is provided with a sand blocking sealing ring 10 (made of rubber, plastic and rubber-plastic composite materials), as shown in fig. 3, the sand blocking sealing ring 10 is provided with a sand blocking skirt, the sand blocking skirt is a lip conical radial skirt 10.1, one end of the lip conical radial skirt 10.1 is thick and the other end is thin, and the thin end is conical, so that the sand blocking performance of the skirt is improved; the lip conical radial skirt 10.1 is arranged along the radial direction of the static ring 3 and is clung to the static ring seat 4; the sand blocking sealing ring 10 is of an annular structure and is arranged around a gap between the periphery of the static ring 3 and the static ring seat 4.
Example 4
On the basis of embodiment 3, as shown in fig. 2 and 4, the two sand blocking skirts are two, namely a lip conical axial skirt 10.2 and a lip conical radial skirt 10.1, the lip conical axial skirt 10.2 and the lip conical radial skirt 10.1 are thick at one end and thin at the other end, the thin end is conical, the plane included angle of the two skirts is 120 degrees, and the sand blocking performance of the skirts is improved; the lip conical axial skirt 10.2 is tightly attached to the static ring 3 along the axial direction of the static ring 3, and the lip conical radial skirt 10.1 is tightly attached to the static ring seat 4 along the radial direction of the static ring 3; the lip tapered axial skirt prevents sand from entering the gap between the stationary ring and the stationary ring seat from the gap between the seal ring and the outer periphery of the stationary ring, and the rest of this embodiment is the same as that of embodiment 3.
Example 5
A centrifugal slurry pump shaft mechanical seal with sand accumulation prevention structure, comprising: the sealing device comprises a movable ring 1, a movable ring mounting seat 2.1, a shaft sleeve 2, a stationary ring 3, a stationary ring seat 4, a stationary ring spring 5, a sealing box 6 (glass fiber reinforced plastic or stainless steel), an atmosphere end sealing combination 7, a cooling water outlet 8 and a cooling water inlet 9; a movable ring seal 11 and a static ring seal 12 are also arranged; the engagement part between the outer periphery of the stationary ring 3 and the stationary ring seat 4 is provided with a sand blocking sealing ring 10 (rubber, plastic and rubber-plastic composite material), as shown in fig. 5, the sand blocking sealing ring 10 is provided with a sand blocking skirt. The sand blocking skirt is a back-buckled lantern ring-shaped skirt 10.3, the back-buckled lantern ring-shaped skirt 10.3 is arranged on one side, close to the static ring seat 4, of the sand blocking sealing ring 10, a bulge 4.1 matched with the shape of the back-buckled end part of the back-buckled lantern ring-shaped skirt 10.3 is arranged on the static ring seat 4, the back-buckled end part of the back-buckled lantern ring-shaped skirt 10.3 is buckled with the bulge 4.1 on the static ring seat 4, one side of the sand blocking sealing ring 10 is reversely buckled on the static ring seat 4, so that the sealing ring has certain negative pressure resistance, the intermittent negative pressure suction of fluid in a pump cavity is prevented from the skirt edge of the sand blocking sealing ring, and sand cannot enter a gap between the static ring and the static ring seat; the sand blocking sealing ring 10 is of an annular structure and is arranged around a gap between the periphery of the static ring 3 and the static ring seat 4.
Example 6
On the basis of the embodiment 5, as shown in fig. 6, the sand blocking skirt edge of the embodiment is divided into two paths; the sand blocking skirt edge is a back-buckled lantern ring-shaped skirt edge 10.3, the back-buckled lantern ring-shaped skirt edge 10.3 is arranged on one side, close to the static ring seat 4, of the sand blocking sealing ring 10, a bulge 4.1 matched with the shape of the back-buckled end part of the back-buckled lantern ring-shaped skirt edge 10.3 is arranged on the static ring seat 4, the back-buckled end part of the back-buckled lantern ring-shaped skirt edge 10.3 is buckled with the bulge 4.1 on the static ring seat 4, one side of the sand blocking sealing ring 10 is reversely buckled on the static ring seat 4, the sealing ring has certain negative pressure resistance, and the intermittent negative pressure suction of fluid in a pump cavity is prevented from entering gaps between the static ring and the static ring seat; the other sand blocking skirt edge is a lip conical axial skirt edge 10.2, one end of the lip conical axial skirt edge 10.2 is thick, the other end is thin, the thin end is conical, the lip conical axial skirt edge 10.2 is arranged along the axial direction of the static ring 3 and is clung to the static ring 3, the plane included angle of the two skirt edges is 90 degrees, the sand blocking performance of the skirt edges is improved, and the rest of the embodiment is the same as the embodiment 5.
Example 7
On the basis of embodiment 5, the back-buckling collar-shaped skirt edge 10.3 of the present embodiment is disposed on one side of the sand blocking sealing ring 10, which is close to the sealing box 6, the sealing box 6 is provided with a protrusion matched with the shape of the back-buckling end part of the back-buckling collar-shaped skirt edge 10.3, the back-buckling end part of the back-buckling collar-shaped skirt edge 10.3 is buckled with the protrusion on the sealing box 6, one side of the sand blocking sealing ring 10 is back-buckled on the sealing box 6, so that the sealing ring has a certain negative pressure resistance, and the skirt edge of the intermittent negative pressure suction sand blocking sealing ring for preventing fluid in the pump cavity is prevented, so that sand grains cannot enter into a gap between a static ring and a static ring seat, and the rest of the present embodiment is the same as embodiment 5.
Example 8
On the basis of embodiment 6, the reversely buckled lantern ring-shaped skirt edge 10.3 is arranged on one side, close to the sealing box 6, of the sand blocking sealing ring 10, a bulge matched with the reversely buckled end part of the reversely buckled lantern ring-shaped skirt edge 10.3 is arranged on the sealing box 6, the reversely buckled end part of the reversely buckled lantern ring-shaped skirt edge 10.3 is buckled with the bulge on the sealing box 6, one side of the sand blocking sealing ring 10 is reversely buckled on the sealing box 6, the sealing ring has certain negative pressure resistance, and intermittent negative pressure suction of fluid in a pump cavity is prevented from entering a gap between a static ring and a static ring seat; the other sand blocking skirt edge is a lip conical axial skirt edge 10.2, one end of the lip conical axial skirt edge 10.2 is thick, the other end is thin, the thin end is conical, the lip conical axial skirt edge 10.2 is arranged along the axial direction of the static ring 3 and is clung to the static ring 3, the plane included angle of the two skirt edges is 100 degrees, the sand blocking performance of the skirt edges is improved, and the rest of the embodiment is the same as that of the embodiment 6.
Claims (10)
1. A centrifugal slurry pump shaft mechanical seal with sand accumulation prevention structure, comprising: the device comprises a movable ring (1), a movable ring mounting seat (2.1), a shaft sleeve (2), a stationary ring (3), a stationary ring seat (4), a stationary ring spring (5), a sealing box (6), an atmosphere end sealing combination (7), a cooling water outlet (8) and a cooling water inlet (9); the device is also provided with a movable ring sealing ring (11) and a static ring sealing ring (12); the method is characterized in that:
the engagement part between the periphery of the stationary ring (3) and the stationary ring seat (4) is provided with a sand blocking sealing ring (10), and at least one sand blocking skirt edge is arranged on the sand blocking sealing ring (10).
2. The centrifugal slurry pump spindle mechanical seal with sand accumulation prevention structure according to claim 1, characterized in that: the sand blocking skirt edge is a flat and thin ring-shaped, and is arranged on one side of the sand blocking sealing ring (10) close to the static ring seat (4).
3. The centrifugal slurry pump spindle mechanical seal with sand accumulation prevention structure according to claim 1, characterized in that: the two sand blocking skirts are flat and thin annular, and the plane included angle of the two skirts is 70-120 degrees; one of the sand blocking skirt edges is arranged on one side, close to the stationary ring seat (4), of the sand blocking sealing ring (10), and the other sand blocking skirt edge is arranged on one side, close to the stationary ring (3), of the sand blocking sealing ring (10).
4. The centrifugal slurry pump spindle mechanical seal with sand accumulation prevention structure according to claim 1, characterized in that: the sand blocking skirt edge is one, the sand blocking skirt edge is a lip conical radial skirt edge (10.1), one end of the lip conical radial skirt edge (10.1) is thick and the other end is thin, and the thin end is conical; the lip conical radial skirt (10.1) is arranged along the radial direction of the static ring (3) and is clung to the static ring seat (4).
5. The centrifugal slurry pump spindle mechanical seal with sand accumulation prevention structure according to claim 1, characterized in that: the two sand blocking skirts are a lip conical axial skirt (10.2) and a lip conical radial skirt (10.1) respectively, one end of the lip conical axial skirt (10.2) and one end of the lip conical radial skirt (10.1) are thick and the other end is thin, the thin end is conical, and the plane included angle of the two skirts is 70-120 degrees; the lip conical axial skirt (10.2) is tightly attached to the static ring (3) along the axial direction of the static ring (3), and the lip conical radial skirt (10.1) is tightly attached to the static ring seat (4) along the radial direction of the static ring (3).
6. The centrifugal slurry pump spindle mechanical seal with sand accumulation prevention structure according to claim 1, characterized in that: the sand blocking skirt edge is one, the sand blocking skirt edge is a back-buckling lantern ring-shaped skirt edge (10.3), the back-buckling lantern ring-shaped skirt edge (10.3) is arranged on the sand blocking sealing ring (10) and is close to one side of the static ring seat (4), protrusions (4.1) matched with the shape of the back-buckling end parts of the back-buckling lantern ring-shaped skirt edge (10.3) are arranged on the static ring seat (4), and the back-buckling end parts of the back-buckling lantern ring-shaped skirt edge (10.3) are buckled with the protrusions (4.1) on the static ring seat (4) in a buckling mode, so that one side of the sand blocking sealing ring (10) is reversely buckled on the static ring seat (4).
7. The centrifugal slurry pump spindle mechanical seal with sand accumulation prevention structure according to claim 1, characterized in that: the sand blocking skirt edge is divided into two paths; the sand blocking skirt is a back-buckling lantern ring-shaped skirt (10.3), the back-buckling lantern ring-shaped skirt (10.3) is arranged on the sand blocking sealing ring (10) and is close to one side of the static ring seat (4), a bulge (4.1) matched with the shape of the back-buckling end part of the back-buckling lantern ring-shaped skirt (10.3) is arranged on the static ring seat (4), and the back-buckling end part of the back-buckling lantern ring-shaped skirt (10.3) is buckled with the bulge (4.1) on the static ring seat (4) to reversely buckle one side of the sand blocking sealing ring (10) on the static ring seat (4); the other sand blocking skirt edge is a lip conical axial skirt edge (10.2), one end of the lip conical axial skirt edge (10.2) is thick, the other end of the lip conical axial skirt edge is thin, the thin end of the lip conical axial skirt edge is conical, the lip conical axial skirt edge (10.2) is tightly attached to the static ring (3) along the axial direction of the static ring (3), and the plane included angle of the two skirt edges is 70-120 degrees.
8. The centrifugal slurry pump spindle mechanical seal with sand accumulation prevention structure according to claim 1, characterized in that: the sand blocking skirt edge is one, the sand blocking skirt edge is a back-buckling lantern ring-shaped skirt edge (10.3), the back-buckling lantern ring-shaped skirt edge (10.3) is arranged on the sand blocking sealing ring (10) and is close to one side of the sealing box (6), protrusions matched with the shape of the back-buckling end part of the back-buckling lantern ring-shaped skirt edge (10.3) are arranged on the sealing box (6), and the back-buckling end part of the back-buckling lantern ring-shaped skirt edge (10.3) is connected with the protrusions on the sealing box (6) in a buckling mode, so that one side of the sand blocking sealing ring (10) is reversely buckled on the sealing box (6).
9. The centrifugal slurry pump spindle mechanical seal with sand accumulation prevention structure according to claim 1, characterized in that: the sand blocking skirt edge is divided into two paths; the sand blocking skirt edge is a back-buckling lantern ring-shaped skirt edge (10.3), the back-buckling lantern ring-shaped skirt edge (10.3) is arranged on one side, close to the sealing box (6), of the sand blocking sealing ring (10), a bulge matched with the shape of the back-buckling end part of the back-buckling lantern ring-shaped skirt edge (10.3) is arranged on the sealing box (6), the back-buckling end part of the back-buckling lantern ring-shaped skirt edge (10.3) is buckled with the bulge on the sealing box (6), and one side of the sand blocking sealing ring (10) is reversely buckled on the sealing box (6); the other sand blocking skirt edge is a lip conical axial skirt edge (10.2), one end of the lip conical axial skirt edge (10.2) is thick, the other end of the lip conical axial skirt edge is thin, the thin end of the lip conical axial skirt edge is conical, the lip conical axial skirt edge (10.2) is tightly attached to the static ring (3) along the axial direction of the static ring (3), and the plane included angle of the two skirt edges is 70-120 degrees.
10. The centrifugal slurry pump spindle mechanical seal with sand accumulation prevention structure according to claim 1, characterized in that:
the sand blocking sealing ring (10) is made of non-metal materials with elasticity;
the sand blocking sealing ring (10) is of an annular structure and is arranged around a gap between the periphery of the static ring (3) and the static ring seat (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322360996.4U CN220646282U (en) | 2023-08-31 | 2023-08-31 | Centrifugal slurry pump rotating shaft mechanical seal with sand accumulation preventing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322360996.4U CN220646282U (en) | 2023-08-31 | 2023-08-31 | Centrifugal slurry pump rotating shaft mechanical seal with sand accumulation preventing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220646282U true CN220646282U (en) | 2024-03-22 |
Family
ID=90268388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322360996.4U Active CN220646282U (en) | 2023-08-31 | 2023-08-31 | Centrifugal slurry pump rotating shaft mechanical seal with sand accumulation preventing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220646282U (en) |
-
2023
- 2023-08-31 CN CN202322360996.4U patent/CN220646282U/en active Active
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