CN209990682U - Pitot tube sealing assembly of pitot tube pump - Google Patents
Pitot tube sealing assembly of pitot tube pump Download PDFInfo
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- CN209990682U CN209990682U CN201920313203.4U CN201920313203U CN209990682U CN 209990682 U CN209990682 U CN 209990682U CN 201920313203 U CN201920313203 U CN 201920313203U CN 209990682 U CN209990682 U CN 209990682U
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Abstract
The utility model relates to a pitot tube sealing component of a pitot tube pump, which comprises an annular sealing body and an O-shaped sealing ring, wherein the outer side wall of the sealing body is provided with a concave groove for accommodating the inner ring of the O-shaped sealing ring, and the outer diameter of the O-shaped sealing ring is larger than that of the sealing body; the inner ring of the sealing body is sleeved on the pitot tube, and the O-shaped sealing ring is abutted to the inner wall of the impeller. The O-shaped sealing ring is tightly sleeved on the sealing body through self elasticity, and the concave groove has a positioning function on the O-shaped sealing ring; when the pitot tube is assembled into the flow guide assembly, the outer diameter of the O-shaped sealing ring is larger than that of the sealing body, the O-shaped sealing ring is in direct contact with the inner wall of the impeller, and the sealing body can be tightly matched with the inner wall of the impeller under the action of toughness and flexibility of the O-shaped sealing ring, so that high-pressure fluid media and low-pressure fluid media are isolated, and the conveying efficiency of the pitot tube pump is improved.
Description
Technical Field
The utility model relates to a fluid pump especially relates to a pitot tube seal assembly of pitot tube pump.
Background
The pitot tube pump comprises a pump body, a flow guide assembly, a mechanical seal assembly, a pitot tube, a shaft, an impeller, a rotary shell, a bearing box body and other main parts, wherein the shaft, the rotary shell and the impeller form a rotary part which is connected with the bearing box through a bearing. The pitot tube is a static part, the impeller is a rotating part, the impeller and the pitot tube are generally labyrinth seals or a gap, fluid media enter the rotating shell through the impeller, the fluid media in the rotating shell are high-pressure fluid media, the position of an inlet of the impeller is low-pressure fluid media, and due to the fact that the two types of pressure differences are large, the media in the rotating shell flow back to the inlet of the pitot tube pump, the volume in the pump body is reduced, and therefore the efficiency of the pitot tube pump is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pitot tube seal assembly of pitot tube pump has and isolates high pressure and low pressure fluid medium, improves the advantage of pitot tube pump efficiency.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: a pitot tube sealing assembly of a pitot tube pump comprises an annular sealing body and an O-shaped sealing ring, wherein a concave groove for accommodating an inner ring of the O-shaped sealing ring is formed in the outer side wall of the sealing body, and the outer diameter of the O-shaped sealing ring is larger than that of the sealing body; the inner ring of the sealing body is sleeved on the pitot tube, and the O-shaped sealing ring is abutted to the inner wall of the impeller.
By adopting the technical scheme, the O-shaped sealing ring is tightly sleeved on the sealing body through self elasticity, and the concave groove has a positioning function on the O-shaped sealing ring; when the pitot tube is assembled into the flow guide assembly, the outer diameter of the O-shaped sealing ring is larger than that of the sealing body, the O-shaped sealing ring is in direct contact with the inner wall of the impeller, and the sealing body can be tightly matched with the inner wall of the impeller under the action of toughness and flexibility of the O-shaped sealing ring, so that high-pressure fluid media and low-pressure fluid media are isolated, and the conveying efficiency of the pitot tube pump is improved.
The utility model discloses further set up to: the sealing body is a PTFE annular ring, an elastic steel ring is arranged in the sealing body, and the axis of the elastic steel ring is the same as that of the sealing body.
By adopting the technical scheme, the anti-extrusion capacity of the sealing body can be improved through the elastic steel ring, and the sealing effect between the impeller and the pitot tube is improved; the PTFE material can be corroded by most media, has certain self-lubricating property, can isolate high-pressure media from low-pressure media, does not cause the phenomena of clamping, wiping and the like between the impeller and the pitot tube, and improves the working efficiency of the pitot tube pump.
The utility model discloses further set up to: the sealing structure is characterized by further comprising a mounting groove formed in the inner wall of the impeller, and the outer ring of the sealing body and the O-shaped sealing ring are located in the mounting groove.
By adopting the technical scheme, the position of the sealing body is limited through the mounting groove, so that the situation that the sealing body is displaced relative to the impeller due to the influence of external force is reduced, and the sealing effect between the pitot tube and the impeller is improved; in addition, when the O-shaped sealing ring is compressed and deformed, the mounting groove can limit the deformation space of the O-shaped sealing ring, and the situation that the O-shaped sealing ring is separated from the recessed groove is reduced.
The utility model discloses further set up to: the recessed groove is arranged coaxially with the sealing body.
By adopting the technical scheme, the O-shaped sealing ring is accurately positioned in the coaxially arranged concave groove, so that all parts of the O-shaped sealing ring are uniformly stressed.
The utility model discloses further set up to: the width direction of the sunken groove is parallel to the axis of the sealing body, and the width of the sunken groove is larger than the diameter of the section of the O-shaped sealing ring.
By adopting the technical scheme, when the pitot tube is assembled into the flow guide assembly, the O-shaped sealing ring can be compressed, and the concave groove reserves the space for the O-shaped sealing ring to deform along the axial direction of the sealing body.
The utility model discloses further set up to: the ratio of the groove depth of the concave groove to the diameter of the cross section of the O-shaped sealing ring is 0.6-0.8.
By adopting the technical scheme, the O-shaped sealing ring is difficult to assemble due to too large section diameter, and is easy to damage due to excessive extrusion; if the diameter of the cross section of the O-shaped sealing ring is too small, the effect of compensating the fit clearance between the sealing body and the inner wall of the impeller cannot be achieved.
The utility model discloses further set up to: the O-shaped sealing ring is a butadiene-acrylonitrile rubber ring, and a Teflon film is coated on the surface of the O-shaped sealing ring.
By adopting the technical scheme, the characteristics of small compression permanent deformation and good elasticity of the nitrile rubber ring are utilized; the Teflon film has the advantages of high wear resistance, low friction coefficient and good self-lubricating property, thereby improving the service performance and prolonging the service life of the O-shaped sealing ring.
To sum up, the utility model discloses a beneficial technological effect does: the O-shaped sealing ring is tightly sleeved on the sealing body through self elasticity, and the concave groove has a positioning function on the O-shaped sealing ring; when the pitot tube is assembled into the flow guide assembly, the outer diameter of the O-shaped sealing ring is larger than that of the sealing body, the O-shaped sealing ring is in direct contact with the inner wall of the impeller, and the sealing body can be tightly matched with the inner wall of the impeller under the action of toughness and flexibility of the O-shaped sealing ring, so that high-pressure fluid media and low-pressure fluid media are isolated, and the conveying efficiency of the pitot tube pump is improved.
Drawings
FIG. 1 is a cross-sectional view of the structure of an embodiment of the present invention;
fig. 2 is a cross-sectional view of the sealing body and the O-ring in an embodiment of the present invention.
In the figure, 1, a seal body; 2. an O-shaped sealing ring; 3. a recessed groove; 4. an elastic steel ring; 5. mounting grooves; 6. a teflon film.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A pitot tube sealing component of a pitot tube pump is shown in figures 1 and 2 and comprises an annular sealing body 1 and an O-shaped sealing ring 2, wherein the sealing body 1 is a PTFE annular ring, an elastic steel ring 4 is wrapped in the sealing body 1, and the axis of the elastic steel ring 4 is the same as that of the sealing body 1; the anti-extrusion capacity of the sealing body 1 can be improved through the elastic steel ring 4, and the sealing effect between the impeller and the pitot tube is improved; the PTFE material can be corroded by most media, has certain self-lubricating property, can isolate high-pressure media from low-pressure media, does not cause the phenomena of clamping, wiping and the like between the impeller and the pitot tube, and improves the working efficiency of the pitot tube pump. The O-shaped sealing ring 2 is a butadiene-acrylonitrile rubber ring, the Teflon film 6 is coated on the surface of the O-shaped sealing ring 2, and the characteristics of small compression permanent deformation and good elasticity of the butadiene-acrylonitrile rubber ring are utilized; the Teflon film 6 has the advantages of high wear resistance, low friction coefficient and good self-lubricating property, thereby improving the service performance and prolonging the service life of the O-shaped sealing ring 2.
The outer side wall of the sealing body 1 is provided with a concave groove 3 for accommodating the inner ring of the O-shaped sealing ring 2, and the outer diameter of the O-shaped sealing ring 2 is larger than that of the sealing body 1; the inner ring of the sealing body 1 is sleeved on the pitot tube, and the O-shaped sealing ring 2 is abutted against the inner wall of the impeller. The O-shaped sealing ring 2 is tightly sleeved on the sealing body 1 through self elasticity, and the concave groove 3 has a positioning function on the O-shaped sealing ring 2; when the pitot tube is assembled into the flow guide assembly, the outer diameter of the O-shaped sealing ring 2 is larger than that of the sealing body 1, the O-shaped sealing ring 2 is in direct contact with the inner wall of the impeller, the sealing body 1 can be tightly matched with the inner wall of the impeller through the flexible function of the O-shaped sealing ring 2, and the static friction force between the sealing body 1 and the outer wall of the pitot tube is increased.
The concave groove 3 and the sealing body 1 are coaxially arranged, the O-shaped sealing ring 2 is accurately positioned in the coaxially arranged concave groove 3, and the stress is uniform. The width direction of sunken groove 3 is parallel with the axis of seal 1, and the width of sunken groove 3 is greater than the cross-sectional diameter of O shape sealing washer 2, and when the pitot tube was assembled into the water conservancy diversion subassembly, O shape sealing washer 2 can be compressed, and sunken groove 3 has reserved the space that O shape sealing washer 2 warp along seal 1 axial. The ratio of the groove depth of the concave groove 3 to the diameter of the cross section of the O-shaped sealing ring 2 is 0.6-0.8, the diameter of the cross section of the O-shaped sealing ring 2 is too large, so that the O-shaped sealing ring 2 is difficult to assemble and easy to damage due to excessive extrusion; if the diameter of the cross section of the O-shaped sealing ring 2 is too small, the function of compensating the fit clearance between the sealing body 1 and the inner wall of the impeller cannot be achieved.
The sealing structure further comprises a mounting groove 5 arranged on the inner wall of the impeller, the outer ring of the sealing body 1 and the O-shaped sealing ring 2 are located in the mounting groove 5, and the position of the sealing body 1 is limited through the mounting groove 5, so that the situation that the sealing body 1 is displaced relative to the impeller due to the influence of external force is reduced, and the sealing effect between the pitot tube and the impeller is improved; in addition, when the O-ring 2 is compressed and deformed, the mounting groove 5 can limit the deformation space of the O-ring 2, and the O-ring 2 can be prevented from being separated from the recessed groove 3.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (6)
1. A pitot tube seal assembly of a pitot tube pump, comprising: the sealing structure comprises an annular sealing body (1) and an O-shaped sealing ring (2), wherein a concave groove (3) for accommodating the inner ring of the O-shaped sealing ring (2) is formed in the outer side wall of the sealing body (1), and the outer diameter of the O-shaped sealing ring (2) is larger than that of the sealing body (1); the inner ring of the sealing body (1) is sleeved on the pitot tube, and the O-shaped sealing ring (2) is abutted against the inner wall of the impeller; still including offering mounting groove (5) in the impeller inner wall, the outer lane of seal (1) with O shape sealing washer (2) are located in mounting groove (5).
2. A pitot tube seal assembly of a pitot tube pump of claim 1, wherein: the sealing body (1) is a PTFE annular ring, an elastic steel ring (4) is arranged in the sealing body (1), and the axis of the elastic steel ring (4) is the same as the axis of the sealing body (1).
3. A pitot tube seal assembly of a pitot tube pump of claim 1, wherein: the concave groove (3) and the sealing body (1) are coaxially arranged.
4. A pitot tube seal assembly of a pitot tube pump of claim 1, wherein: the width direction of the concave groove (3) is parallel to the axis of the sealing body (1), and the width of the concave groove (3) is larger than the section diameter of the O-shaped sealing ring (2).
5. A pitot tube seal assembly of a pitot tube pump of claim 1, wherein: the ratio of the groove depth of the concave groove (3) to the diameter of the cross section of the O-shaped sealing ring (2) is 0.6-0.8.
6. A pitot tube seal assembly of a pitot tube pump of claim 1, wherein: the O-shaped sealing ring (2) is a butadiene-acrylonitrile rubber ring, and a Teflon film (6) is coated on the surface of the O-shaped sealing ring (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920313203.4U CN209990682U (en) | 2019-03-13 | 2019-03-13 | Pitot tube sealing assembly of pitot tube pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920313203.4U CN209990682U (en) | 2019-03-13 | 2019-03-13 | Pitot tube sealing assembly of pitot tube pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209990682U true CN209990682U (en) | 2020-01-24 |
Family
ID=69289307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920313203.4U Active CN209990682U (en) | 2019-03-13 | 2019-03-13 | Pitot tube sealing assembly of pitot tube pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209990682U (en) |
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2019
- 2019-03-13 CN CN201920313203.4U patent/CN209990682U/en active Active
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