CN112066116A - Spherical sealing joint for hydraulic test of turbopump of liquid rocket engine - Google Patents
Spherical sealing joint for hydraulic test of turbopump of liquid rocket engine Download PDFInfo
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- CN112066116A CN112066116A CN202010980246.5A CN202010980246A CN112066116A CN 112066116 A CN112066116 A CN 112066116A CN 202010980246 A CN202010980246 A CN 202010980246A CN 112066116 A CN112066116 A CN 112066116A
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- sealing
- spherical
- radial
- joint
- sealing joint
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/02—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction
- F16L27/04—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces
- F16L27/06—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces with special sealing means between the engaging surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/96—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by specially adapted arrangements for testing or measuring
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Gasket Seals (AREA)
Abstract
The invention relates to the technical field of sealing of turbopumps, in particular to a sealing joint for a hydraulic test of a turbopump of a liquid rocket engine. The invention aims to solve the problems that the prior art is easy to damage the sealing surface of a turbine pump, and has poor sealing performance, poor universality and higher cost. The sealing joint is provided with a step sealing surface, a radial sealing surface and a bolt hole; the step sealing surface is parallel to the end surface of the sealing joint; the radial sealing surface is positioned between the end surface of the sealing joint and the step sealing surface and is vertical to the step sealing surface; the step sealing surface is attached to the end surface matching surface cover; the radial sealing surface is attached to the radial matching surface; the spherical surface matching surface is matched with the concave spherical surface of the sealing joint of the turbine pump. The spherical sealing joint for the hydraulic test of the liquid engine turbine pump can improve the sealing property and the universality and has lower cost through the matching effect of the spherical sealing gasket and the end surface and the radial sealing surface.
Description
Technical Field
The invention relates to a sealing joint for a turbine pump hydraulic test, in particular to a spherical sealing joint for a turbine pump hydraulic test of a liquid rocket engine.
Background
Most of the existing turbopump interfaces of liquid rocket engines adopt spherical sealing structures, and sealing is carried out by generating sealing belts between the concave spherical surface and the convex spherical surface through metal hard connection. However, the turbine pump hydraulic test is an important link for acceptance inspection of the turbine pump of the liquid rocket engine, and if the existing sealing mode is adopted, the sealing surface of the turbine pump is easily damaged, and the sealing surface is failed and products are scrapped under severe conditions; as the convex spherical surface test process equipment butted with the concave spherical surface of the turbine pump, the process equipment is seriously abraded after long-term repeated use, so that the sealing of the process equipment is invalid, and the process equipment has higher cost and poor universality.
Disclosure of Invention
The invention aims to solve the problems that the prior art is easy to damage the sealing surface of a turbopump, and has poor sealing performance, poor universality and higher cost, and provides a spherical sealing joint for a hydraulic test of a turbopump of a liquid rocket engine.
The technical scheme of the invention is as follows:
a spherical sealing joint for hydraulic test of a turbopump of a liquid rocket engine is characterized in that:
comprises a sealing joint and a spherical sealing gasket;
the sealing joint is provided with a step sealing surface, a radial sealing surface and a bolt hole;
the step sealing surface is parallel to the end surface of the sealing joint;
the radial sealing surface is positioned between the end surface of the sealing joint and the step sealing surface and is vertical to the step sealing surface;
the spherical sealing gasket comprises an end surface matching surface, a radial matching surface and a spherical matching surface;
the end face matching surface is attached to the step sealing surface; the radial matching surface is attached to the radial sealing surface;
the spherical surface matching surface is matched with a concave spherical surface of the sealing joint of the turbine pump.
Further, at least two sealing thorns are arranged on the step sealing surface.
Further, at least two sealing thorns are arranged on the radial sealing surface. The sealing effect can be better by arranging the sealing pricks.
Furthermore, a rectangular sealing groove is formed in the step sealing surface, and an O-shaped sealing ring is arranged in the rectangular sealing groove.
Furthermore, a triangular groove is formed in the middle of the spherical matching surface; an O-shaped sealing ring is arranged in the triangular groove.
Furthermore, a rectangular groove is formed in the middle of the spherical matching surface; the rectangular groove is provided with an O-shaped sealing ring.
Further, the radial sealing surface and the radial matching surface are in interference fit;
the length of the radius corresponding to the cambered surface of the spherical surface matching surface is 1 mm-2 mm more than that of the radius corresponding to the cambered surface of the concave spherical surface of the sealing joint of the turbopump.
Furthermore, the spherical sealing gasket is made of polytetrafluoroethylene or polyimide.
The O-shaped sealing ring is made of nitrile rubber or fluororubber, and both the nitrile rubber and the fluororubber have the advantages of high temperature resistance, corrosion resistance and wear resistance.
Furthermore, the opening angle X of the sealing thorn is 30-90 degrees, the opening depth Y is 0.3-0.6 mm, and the spherical sealing gasket can be completely contacted with the sealing surface through the opening.
The invention has the beneficial effects that:
(1) the spherical sealing joint for the hydraulic test of the liquid engine turbine pump can improve the sealing property and the universality and has lower cost through the matching effect of the spherical sealing gasket and the end surface and the radial sealing surface.
(2) The spherical sealing joint for the hydraulic test of the liquid engine turbine pump provided by the invention has the advantages that the high pressure resistance and the negative pressure resistance can meet the requirements of technical indexes, and meanwhile, the service life of sealing process equipment is prolonged.
(3) The spherical sealing joint for the hydraulic test of the liquid engine turbine pump is easy to replace in the test process, and the sealing joint is convenient to process.
Drawings
FIG. 1 is a schematic view of a spherical sealing joint structure for hydraulic test of a liquid engine turbine pump according to the present invention;
FIG. 2 is a schematic view of a seal joint structure according to an embodiment of the present invention for hydraulic testing of a liquid engine turbine pump;
FIG. 3 is an enlarged view of a portion of the spherical gasket of FIG. 2 at A;
FIG. 4 is a schematic view of a sealing joint structure of a second embodiment of the spherical sealing joint for hydraulic test of a liquid engine turbine pump according to the present invention;
FIG. 5 is a partial enlarged view of FIG. 4 at B;
FIG. 6 is a schematic view of a third embodiment of a sealing joint according to the present invention for hydraulic testing of a liquid engine turbine pump;
FIG. 7 is a schematic view of a seal joint structure in a fourth embodiment of the spherical seal joint for hydraulic test of a liquid engine turbine pump according to the present invention;
FIG. 8 is a schematic view of a fifth embodiment of a spherical sealing joint for hydraulic testing of a liquid engine turbine pump according to the present invention;
FIG. 9 is an enlarged partial view of the spherical seal at C of FIG. 8;
FIG. 10 is a schematic view of a seal joint structure according to a sixth embodiment of the present invention for hydraulic testing of a liquid engine turbine pump;
FIG. 11 is a schematic view of a seventh sealing joint structure of an embodiment of a spherical joint for hydraulic testing of a liquid engine turbine pump according to the present invention;
FIG. 12 is a schematic view of a sealing joint structure of an eighth embodiment of the spherical sealing joint for hydraulic testing of a liquid engine turbine pump according to the present invention;
FIG. 13 is an enlarged partial view of the spherical seal at D of FIG. 12;
FIG. 14 is a schematic view of a sealing joint structure in a ninth embodiment of the spherical sealing joint for hydraulic test of the turbine pump of the liquid engine according to the present invention;
fig. 15 is a schematic view of a sealing joint structure in a tenth embodiment of the spherical sealing joint for hydraulic test of the liquid engine turbine pump according to the invention.
Description of reference numerals:
1-sealing joint, 11-step sealing surface, 12-radial sealing surface, 13-bolt hole, 14-sealing joint end surface, 2-spherical sealing pad, 21-end surface matching surface, 22-radial matching surface, 23-spherical matching surface, 24-triangular groove, 25-rectangular groove, 3-sealing thorn, 4-rectangular sealing groove and 5-concave spherical surface of turbine pump sealing joint.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
The first embodiment is as follows: as shown in fig. 1, fig. 2 and fig. 3, the spherical joint for hydraulic test of the turbopump of the liquid rocket engine provided by the invention comprises a sealing joint 1 and a spherical sealing gasket 2;
the sealing joint 1 is provided with a step sealing surface 11, a radial sealing surface 12 and a bolt hole 13;
the step sealing surface 11 is parallel to the sealing joint end surface 14;
the radial sealing surface 12 is positioned between the sealing joint end surface 14 and the stepped sealing surface 11 and is perpendicular to the stepped sealing surface 11;
the spherical sealing gasket 2 comprises an end surface matching surface 21, a radial matching surface 22 and a spherical matching surface 23;
the end surface matching surface 21 is completely attached to the step sealing surface 11; the radial matching surface 22 is completely attached to the radial sealing surface 12;
the spherical mating surface 23 matches the concave spherical surface 5 of the turbo pump seal joint.
The following optimization is performed in combination with the first embodiment:
example two: as shown in fig. 4, two sealing burrs 3 are arranged on the stepped sealing surface 11; the end face matching surface 21 is tightly attached to the step sealing surface 11, and the radial matching surface 22 is in interference fit with the radial sealing surface 12; the spherical matching surface 23 is matched with the concave spherical surface 5 of the sealing joint of the turbine pump.
Example three: as shown in fig. 6, two sealing burrs 3 are arranged on the stepped sealing surface 11 and the radial sealing surface 12; the end face matching surface 21 is tightly attached to the step sealing surface 11, and the radial matching surface 22 is in interference fit with the radial sealing surface 12; the spherical matching surface 23 is matched with the concave spherical surface 5 of the sealing joint of the turbine pump.
Example four: as shown in fig. 7, a rectangular sealing groove 4 is formed on the stepped sealing surface 11; an O-shaped sealing ring is arranged in the rectangular sealing groove 4; the end face matching surface 21 is tightly attached to the step sealing surface 11, and the radial matching surface 22 is in interference fit with the radial sealing surface 12; the spherical matching surface 23 is matched with the concave spherical surface 5 of the sealing joint of the turbine pump.
Example five: as shown in fig. 8 and 9, two sealing burrs 3 are arranged on the stepped sealing surface 11; a triangular groove 24 is formed in the middle of the spherical matching surface 23; the triangular groove 24 is provided with an O-shaped sealing ring; the end face matching surface 21 is tightly attached to the step sealing surface 11, and the radial matching surface 22 is in interference fit with the radial sealing surface 12; the spherical matching surface 23 is matched with the concave spherical surface 5 of the sealing joint of the turbine pump.
Example six: as shown in fig. 10, two sealing burrs 3 are arranged on the stepped sealing surface 11 and the radial sealing surface 12; a triangular groove 24 is formed in the middle of the spherical matching surface 23; the triangular groove 24 is provided with an O-shaped sealing ring; the end face matching surface 21 is tightly attached to the step sealing surface 11, and the radial matching surface 22 is in interference fit with the radial sealing surface 12; the spherical matching surface 23 is matched with the concave spherical surface 5 of the sealing joint of the turbine pump.
Example seven: as shown in fig. 11, a rectangular sealing groove 4 is formed in the stepped sealing surface 11, and an O-ring is disposed in the rectangular sealing groove 4; a triangular groove 24 is formed in the middle of the spherical matching surface 23; the triangular groove 24 is provided with an O-shaped sealing ring; the end face matching surface 21 is tightly attached to the step sealing surface 11, and the radial matching surface 22 is in interference fit with the radial sealing surface 12; the spherical matching surface 23 is matched with the concave spherical surface 5 of the sealing joint of the turbine pump.
Example eight: as shown in fig. 12 and 13, two sealing burrs 3 are arranged on the stepped sealing surface 11; a rectangular groove 25 is formed in the middle of the spherical matching surface 23; the rectangular groove 25 is provided with an O-shaped sealing ring; the end face matching surface 21 is tightly attached to the step sealing surface 11, and the radial matching surface 22 is in interference fit with the radial sealing surface 12; the spherical matching surface 23 is matched with the concave spherical surface 5 of the sealing joint of the turbine pump.
Example nine: as shown in fig. 14, two sealing burrs 3 are arranged on the stepped sealing surface 11 and the radial sealing surface 12; a rectangular groove 25 is formed in the middle of the spherical matching surface 23; the rectangular groove 25 is provided with an O-shaped sealing ring; the end face matching surface 21 is tightly attached to the step sealing surface 11, and the radial matching surface 22 is in interference fit with the radial sealing surface 12; the spherical matching surface 23 is matched with the concave spherical surface 5 of the sealing joint of the turbine pump.
Example ten: as shown in fig. 15, a rectangular sealing groove 4 is formed in the stepped sealing surface 11, and an O-ring is disposed in the rectangular sealing groove 4; a rectangular groove 25 is formed in the middle of the spherical matching surface 23; the rectangular groove 25 is provided with an O-shaped sealing ring; the end face matching surface 21 is tightly attached to the step sealing surface 11, and the radial matching surface 22 is in interference fit with the radial sealing surface 12; the spherical matching surface 23 is matched with the concave spherical surface 5 of the sealing joint of the turbine pump.
As shown in fig. 5, the radius corresponding to the radian of the spherical surface fitting surface 23 is 1 to 2 degrees longer than the length of the radius corresponding to the radian of the concave spherical surface 5 of the turbine seal joint; the opening angle X of the seal thorn 3 is 30-90 degrees, and the opening depth Y is 0.3-0.6 mm; the spherical sealing gasket 3 is made of polytetrafluoroethylene or polyimide, and the O-shaped sealing ring is made of nitrile rubber or fluororubber.
As shown in fig. 9 and 13, the groove area of the triangular groove 24 or the groove area of the rectangular groove 25 has the following relationship with the cross-sectional area of the O-ring:
and (the cross section area S1 of the O-shaped sealing ring-the slotted cross section area S2) and the cross section area S1 of the O-shaped sealing ring-the compression amount of the O-shaped sealing ring is (25% -30%), namely the compression amount of the O-shaped sealing ring is required to be (25% -30%).
The rectangular sealing groove 4 is processed on the stepped sealing surface 11, and if the rectangular sealing groove is processed on the radial sealing surface 12, an O-shaped sealing ring is scratched in the assembling process, so that the sealing effect is lost.
The triangular groove 24 and the rectangular groove 25 are arranged in the middle of the spherical matching surface 23, so that the O-shaped sealing ring is easy to overflow and lose efficacy under high pressure if the grooving position is close to the front during processing, and the sealing specific pressure of the O-shaped sealing ring is too small and is easy to lose efficacy so as not to seal if the grooving position is close to the rear during processing.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and it is obvious for a person skilled in the art to modify the specific technical solutions described in the foregoing embodiments or to substitute part of the technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions protected by the present invention.
Claims (9)
1. The utility model provides a spherical sealing joint for liquid rocket engine turbopump hydraulic test which characterized in that:
comprises a sealing joint (1) and a spherical sealing gasket (2);
the sealing joint (1) is provided with a step sealing surface (11), a radial sealing surface (12) and a bolt hole (13);
the step sealing surface (11) is parallel to the sealing joint end surface (14);
the radial sealing surface (12) is positioned between the sealing joint end surface (14) and the step sealing surface (11) and is vertical to the step sealing surface (11);
the spherical sealing gasket (2) comprises an end surface matching surface (21), a radial matching surface (22) and a spherical matching surface (23);
the end face matching surface (21) is attached to the step sealing surface (11); the radial matching surface (22) is attached to the radial sealing surface (12);
the spherical surface matching surface (23) is matched with a concave spherical surface (5) of the sealing joint of the turbine pump.
2. The spherical sealing joint for the hydraulic test of the turbopump of the liquid rocket engine is characterized by comprising the following components in parts by weight:
the step sealing surface (11) is provided with at least two sealing thorns (3).
3. The spherical sealing joint for the hydraulic test of the turbopump of the liquid rocket engine is characterized by comprising the following components in parts by weight:
the radial sealing surface (12) is provided with at least two sealing spines (3).
4. The spherical sealing joint for the hydraulic test of the turbopump of the liquid rocket engine is characterized by comprising the following components in parts by weight:
the step sealing surface (11) is provided with a rectangular sealing groove (4), and an O-shaped sealing ring is arranged in the rectangular sealing groove.
5. The spherical sealing joint for hydraulic test of the turbopump of the liquid rocket engine according to 1, 2, 3 or 4, is characterized in that:
a triangular groove (24) is formed in the middle of the spherical matching surface (23); an O-shaped sealing ring is arranged in the triangular groove (24).
6. The spherical sealing joint for hydraulic test of the turbopump of the liquid rocket engine according to 1, 2, 3 or 4, is characterized in that:
a rectangular groove (25) is formed in the middle of the spherical matching surface (23); an O-shaped sealing ring is arranged in the rectangular groove (25).
7. The spherical sealing joint for hydraulic test of the turbopump of the liquid rocket engine according to 1, 2, 3 or 4, is characterized in that:
the radial sealing surface (12) is in interference fit with the radial matching surface (22);
the radius corresponding to the cambered surface of the spherical surface matching surface (23) is 1-2 mm longer than the length of the radius corresponding to the radian of the concave spherical surface (5) of the turbine pump sealing joint.
8. The spherical sealing joint for hydraulic test of the turbopump of the liquid rocket engine according to 1, 2, 3 or 4, is characterized in that:
the spherical sealing gasket (2) is made of polytetrafluoroethylene or polyimide;
the O-shaped sealing ring is made of nitrile rubber or fluororubber.
9. The spherical sealing joint for hydraulic test of the turbopump of the liquid rocket engine according to 2, 3 or 4, is characterized in that:
the opening angle X of the sealing thorn (3) is 30-90 degrees, and the opening depth Y is 0.3-0.6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010980246.5A CN112066116B (en) | 2020-09-17 | 2020-09-17 | Spherical sealing joint for hydraulic test of turbopump of liquid rocket engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010980246.5A CN112066116B (en) | 2020-09-17 | 2020-09-17 | Spherical sealing joint for hydraulic test of turbopump of liquid rocket engine |
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| CN112066116A true CN112066116A (en) | 2020-12-11 |
| CN112066116B CN112066116B (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010980246.5A Active CN112066116B (en) | 2020-09-17 | 2020-09-17 | Spherical sealing joint for hydraulic test of turbopump of liquid rocket engine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943483A (en) * | 2021-01-26 | 2021-06-11 | 西安航天动力研究所 | Double-channel redundant sealing device of liquid rocket engine |
| CN115163951A (en) * | 2022-06-30 | 2022-10-11 | 北京宇航系统工程研究所 | Assembly self-adaptation sphere flange joint structure |
| CN116398473A (en) * | 2023-06-08 | 2023-07-07 | 合肥化机装备制造有限公司 | Spherical sealing joint for engine turbopump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112943483A (en) * | 2021-01-26 | 2021-06-11 | 西安航天动力研究所 | Double-channel redundant sealing device of liquid rocket engine |
| CN115163951A (en) * | 2022-06-30 | 2022-10-11 | 北京宇航系统工程研究所 | Assembly self-adaptation sphere flange joint structure |
| CN116398473A (en) * | 2023-06-08 | 2023-07-07 | 合肥化机装备制造有限公司 | Spherical sealing joint for engine turbopump |
| CN116398473B (en) * | 2023-06-08 | 2023-08-18 | 合肥化机装备制造有限公司 | Spherical sealing joint for engine turbopump |
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|---|---|
| CN112066116B (en) | 2022-05-10 |
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