CN210344284U - Mechanical sealing device of high-speed high-pressure hydraulic pump - Google Patents
Mechanical sealing device of high-speed high-pressure hydraulic pump Download PDFInfo
- Publication number
- CN210344284U CN210344284U CN201921147250.2U CN201921147250U CN210344284U CN 210344284 U CN210344284 U CN 210344284U CN 201921147250 U CN201921147250 U CN 201921147250U CN 210344284 U CN210344284 U CN 210344284U
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- China
- Prior art keywords
- sealing ring
- hydraulic pump
- rear end
- tightly attached
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 56
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229910000978 Pb alloy Inorganic materials 0.000 claims description 3
- WIKSRXFQIZQFEH-UHFFFAOYSA-N [Cu].[Pb] Chemical compound [Cu].[Pb] WIKSRXFQIZQFEH-UHFFFAOYSA-N 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 6
- 230000003068 static effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- Sealing Devices (AREA)
Abstract
The utility model discloses a mechanical sealing device of high-speed high-pressure hydraulic pump, including casing, back lid, transmission shaft, the casing inboard is equipped with annular I, and rubber seal I arranges in annular I, and the casing rear end is equipped with counter bore I, and bearing inner race and the interference fit installation of counter bore I, bearing inner race and transmission shaft interference fit installation; the front end of the rear cover is provided with a through hole II, the inner side of the through hole II is provided with an annular groove II, the rubber sealing ring II is arranged in the annular groove II, the rear end of the rear cover is provided with a counter bore II, and the elastic element is arranged in the counter bore II; the rear end of the support frame is provided with a flange, and the front end surface of the flange is tightly attached to the elastic element; the sealing ring is movably connected with the supporting frame, the front end face of the sealing ring is tightly attached to the rear end face of the flange, and the rear end face of the sealing ring is tightly attached to the front end face of the bearing inner ring. The elastic element provides compensation elasticity, ensures that the support frame, the sealing ring and the bearing are tightly attached, and has the characteristics of simple structure, good sealing property, high rotating speed resistance, vibration impact resistance, high reliability, long service life and the like.
Description
Technical Field
The utility model relates to a machinery hydraulic pressure technical field, in particular to mechanical seal device of high-speed high-pressure hydraulic pump.
Background
To increase the power density of high pressure hydraulic pumps, hydraulic pumps are gradually moving towards high speeds and pressures, which, however, present sealing difficulties. Since the transmission shaft penetrates inside and outside the hydraulic pump, a circumferential gap exists between the transmission shaft and the hydraulic pump housing, and hydraulic oil inside the hydraulic pump leaks outwards through the gap, a sealing device for preventing leakage must be arranged at the tail part of the transmission shaft. The low-speed low-pressure hydraulic pump generally adopts a rotary shaft lip-shaped sealing ring, and the sealing ring is made of rubber materials, so that the rotary speed and the sealing specific pressure allowed by the rotary shaft lip-shaped sealing ring are lower, and the low-speed low-pressure hydraulic pump cannot be used for a high-speed high-pressure hydraulic pump. The traditional mechanical seal adopted by the equipment such as a reduction gearbox, a centrifugal machine and the like can be used for a hydraulic pump, but the traditional mechanical seal generally comprises a movable ring, a static ring, a spring, an auxiliary sealing ring and other parts, has the problems of complex structure and poor vibration and impact resistance, and is particularly used for a high-speed high-pressure hydraulic pump.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a mechanical seal device of high-speed high-pressure hydraulic pump aims at improving reliability and life-span under the high-speed high-pressure operating mode of hydraulic pump.
The utility model discloses a following technical scheme can realize.
The utility model provides a mechanical seal device of high-speed high-pressure hydraulic pump, includes casing, back lid, transmission shaft, its characterized in that: the shell is provided with a through hole I, the transmission shaft and the through hole I are installed in a clearance fit mode, an annular groove I is formed in the inner side of the shell, a rubber sealing ring I is arranged in the annular groove I, a rear cover is installed in the position, close to the front end, of the shell, the outer side of the rear cover is tightly attached to the rubber sealing ring I, a counter bore I is formed in the rear end of the shell, a bearing outer ring and the counter bore I are installed in an interference fit mode, and a bearing inner ring and;
the front end of the rear cover is provided with a through hole II, the inner side of the through hole II is provided with an annular groove II, the rubber sealing ring II is arranged in the annular groove II, the rear end of the rear cover is provided with a counter bore II, and the elastic element is arranged in the counter bore II;
the supporting frame is movably connected with the rear cover, the front end of the supporting frame extends into the through hole II, the front end of the supporting frame is tightly attached to the rubber sealing ring II, the rear end of the supporting frame is provided with a flange, the front end surface of the flange is tightly attached to the elastic element, the supporting frame is also provided with a through hole III, and the transmission shaft and the through hole III are installed in a clearance fit mode;
the sealing ring is movably connected with the supporting frame, the front end face of the sealing ring is tightly attached to the rear end face of the flange, and the rear end face of the sealing ring is tightly attached to the front end face of the bearing inner ring.
Two bosses which are symmetrically distributed are arranged on the inner side of the counter bore II, and two limiting grooves which are symmetrically distributed are arranged on the outer side of the flange of the supporting frame.
A buckle is arranged behind each lug boss.
The bearing is a deep groove ball bearing or an angular contact ball bearing.
The elastic element is any one of a wave spring, a disc spring and a cylindrical compression spring.
The sealing ring is made of copper-impregnated graphite or copper-lead alloy.
The transmission shaft is equipped with and keeps off the shoulder, keep off the shoulder with the rear end face of bearing inner race closely laminates, is equipped with annular III at the root of keeping off the shoulder, and rubber seal III arranges annular III in, and bearing inner race closely laminates with rubber seal III.
The beneficial effects of the utility model reside in that: the bearing replaces a moving ring in the traditional mechanical seal, not only can provide axial support, but also can provide radial support, and the vibration resistance and the impact resistance of the mechanical seal device are improved; the sealing ring is positioned between the support frame and the bearing, and can freely rotate relative to the support frame and the bearing, so that the specific work and the specific pressure of the pair of friction pairs of the sealing ring and the bearing are reduced, and the service life and the reliability of the friction pairs are improved; the utility model discloses not only be applicable to high-speed high-pressure hydraulic pump, be applicable to other high-speed rotating machinery moreover.
Drawings
Fig. 1 is a cross-sectional view of the present invention; fig. 2 is a schematic view of the rear cover of the present invention; fig. 3 is a schematic view of the support frame of the present invention.
Description of the drawings: 1. casing, 2, back lid, 3, transmission shaft, 4, rubber seal I, 5, bearing, 6, rubber seal II, 7, elastic element, 8, support frame, 9, sealing ring, 10, rubber seal III, 11, through-hole I, 12, annular I, 13, counter bore I, 21, through-hole II, 22, annular II, 23, counter bore II, 24, boss, 25, buckle, 81, flange, 82, through-hole III, 83, spacing groove, 31, keep off the shoulder, 32, annular III.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in fig. 1, a mechanical seal device of high-speed high-pressure hydraulic pump, including casing 1, back lid 2, transmission shaft 3, casing 1 is equipped with through-hole 11I, transmission shaft 3 and the installation of through-hole 11I clearance fit, casing 1 inboard is equipped with annular 12I, annular 12I is arranged in to rubber seal 4I, back lid 2 is installed in casing 1 near the position of front end, the outside of back lid 2 closely laminates with rubber seal 4I, casing 1's rear end is equipped with counter bore 13I, 5 outer lanes of deep groove ball bearing and the installation of counter bore 13I 13 interference fit, 5 inner races of bearing and 3 interference fit installations of transmission shaft.
As shown in fig. 2, the front end of the rear cover 2 is provided with a through hole 21 ii, an annular groove 22 ii is formed in the inner side of the through hole 21 ii, the rubber seal ring 6 ii is arranged in the annular groove 22 ii, the rear end of the rear cover 2 is provided with a counter bore 23 ii, and the elastic element 7 is arranged in the counter bore 23 ii.
A sealing ring 9 made of copper-impregnated graphite is movably connected with the support frame 8, the front end face of the sealing ring 9 is tightly attached to the rear end face of the flange 81, and the rear end face of the sealing ring 9 is tightly attached to the front end face of the inner ring of the deep groove ball bearing 5.
As shown in fig. 2, two bosses 24 are symmetrically arranged on the inner side of the counter bore 23 ii, and a buckle 25 is arranged behind each boss 24; as shown in fig. 3, two symmetrically distributed limiting grooves 83 are disposed on the outer side of the flange 81 of the supporting frame 8.
The transmission shaft 3 is provided with a retaining shoulder 31, the retaining shoulder 31 is tightly attached to the rear end face of the inner ring of the deep groove ball bearing 5, a ring groove 32 III is formed in the root of the retaining shoulder 31, a rubber sealing ring 10 III is arranged in the ring groove 32 III, and the inner ring of the deep groove ball bearing 5 is tightly attached to the rubber sealing ring 10 III.
The support frame and back lid swing joint, during the front end of support frame stretched into through-hole II, the front end of support frame closely laminated with rubber seal II, the rear end of support frame is equipped with the flange, and the preceding terminal surface and the elastic element of flange closely laminate, the support frame still is equipped with through-hole III, and the transmission shaft passes through-hole III, transmission shaft and the installation of III clearance fit of through-hole.
The sealing ring 9 is positioned between the support frame and the bearing, the sealing ring is movably connected with the support frame, the front end surface of the sealing ring is tightly attached to the rear end surface of the support frame flange, the rear end surface of the sealing ring is tightly attached to the front end surface of the bearing inner ring, and the sealing ring can freely rotate relative to the support frame flange and the bearing inner ring; the elastic element provides compensation elasticity, and the support frame, the sealing ring and the bearing are tightly attached.
Further, II inboards of counter bore of 2 rear ends of back lid are equipped with two bosss that are the symmetric distribution, and the flange outside of support frame is equipped with two spacing grooves that are the symmetric distribution, and the width of spacing groove is slightly wider than the width of boss, and when the back lid was packed into to the support frame, the boss of back lid was put into after aligning the spacing groove of support frame, can prevent like this that the support frame from rotating along with the sealing ring, guaranteed that to be static seal between support frame and the back lid all the time.
Furthermore, buckles are arranged behind the two bosses on the rear cover 2, the width of each buckle is slightly wider than that of the boss, but is slightly narrower than that of the limiting groove, and the buckles do not influence the limiting groove to be placed into the bosses; after the support frame is installed in the rear cover, the support frame can be manually rotated slightly because the width of the limiting groove is slightly wider than that of the boss, so that the limiting groove rotates by a small angle, flanges on two sides of the limiting groove enter the lower portion of the buckle and are blocked by the buckle, and the flanges are tightly pressed on the buckle under the action of the elastic force of the elastic element, so that the support frame can be further prevented from rotating along with the sealing ring, the reliability of static sealing between the support frame and the rear cover is ensured, and the support frame is also convenient to disassemble.
Further, the bearing 5 may be a conventional bearing such as a deep groove ball bearing, an angular contact ball bearing, or the like, or may be another unconventional bearing.
Further, the elastic element 7 may be a wave spring, a disc spring, a cylindrical compression spring, or even an electromagnet may be used instead of the elastic element.
Further, the material of the sealing ring 9 can adopt a self-lubricating metal material such as copper-impregnated graphite, copper-lead alloy and the like, or adopt a cheap metal surface with silver plating or molybdenum disulfide spraying; in order to reduce the cost, the sealing ring can be made of nonmetal self-lubricating materials such as polytetrafluoroethylene, but the service life of the sealing ring can be shortened.
Further, if the shell 1 is made of an aluminum alloy material and the bearing is made of a bearing steel material, the interference magnitude between the outer ring of the bearing and the counter bore I is preferably (0.012-0.018) mm.
Further, if the transmission shaft 3 is made of a tool steel material and the bearing is made of a bearing steel material, the interference magnitude between the inner ring of the bearing and the transmission shaft is preferably (0.008-0.012) mm.
In addition, a retaining shoulder can be further arranged on the transmission shaft 3, the retaining shoulder is tightly attached to the rear end face of the bearing inner ring, a ring groove III is formed in the root of the retaining shoulder, the rubber sealing ring III is arranged in the ring groove III, the bearing inner ring is tightly attached to the rubber sealing ring III, the sealing effect is better than that of the sealing effect which is achieved by simply relying on interference fit installation, oil is prevented from leaking between the bearing inner ring and the transmission shaft, and the requirement for machining precision is lowered.
Claims (7)
1. The utility model provides a mechanical seal device of high-speed high-pressure hydraulic pump, includes casing, back lid, transmission shaft, its characterized in that: the shell is provided with a through hole I, the transmission shaft and the through hole I are installed in a clearance fit mode, an annular groove I is formed in the inner side of the shell, a rubber sealing ring I is arranged in the annular groove I, a rear cover is installed in the position, close to the front end, of the shell, the outer side of the rear cover is tightly attached to the rubber sealing ring I, a counter bore I is formed in the rear end of the shell, a bearing outer ring and the counter bore I are installed in an interference fit mode, and a bearing inner ring and;
the front end of the rear cover is provided with a through hole II, the inner side of the through hole II is provided with an annular groove II, the rubber sealing ring II is arranged in the annular groove II, the rear end of the rear cover is provided with a counter bore II, and the elastic element is arranged in the counter bore II;
the supporting frame is movably connected with the rear cover, the front end of the supporting frame extends into the through hole II, the front end of the supporting frame is tightly attached to the rubber sealing ring II, the rear end of the supporting frame is provided with a flange, the front end surface of the flange is tightly attached to the elastic element, the supporting frame is also provided with a through hole III, and the transmission shaft and the through hole III are installed in a clearance fit mode;
the sealing ring is movably connected with the supporting frame, the front end face of the sealing ring is tightly attached to the rear end face of the flange, and the rear end face of the sealing ring is tightly attached to the front end face of the bearing inner ring.
2. The mechanical seal device of a high-speed high-pressure hydraulic pump according to claim 1, characterized in that: two bosses which are symmetrically distributed are arranged on the inner side of the counter bore II, and two limiting grooves which are symmetrically distributed are arranged on the outer side of the flange of the supporting frame.
3. The mechanical seal device of a high-speed high-pressure hydraulic pump according to claim 2, characterized in that: a buckle is arranged behind each lug boss.
4. The mechanical seal device of a high-speed high-pressure hydraulic pump according to claim 1, characterized in that: the bearing is a deep groove ball bearing or an angular contact ball bearing.
5. The mechanical seal device of a high-speed high-pressure hydraulic pump according to claim 1, characterized in that: the elastic element is any one of a wave spring, a disc spring and a cylindrical compression spring.
6. The mechanical seal device of a high-speed high-pressure hydraulic pump according to claim 1, characterized in that: the sealing ring is made of copper-impregnated graphite or copper-lead alloy.
7. The mechanical seal device of a high-speed high-pressure hydraulic pump according to claim 1, characterized in that: the transmission shaft is equipped with and keeps off the shoulder, keep off the shoulder with the rear end face of bearing inner race closely laminates, is equipped with annular III at the root of keeping off the shoulder, and rubber seal III arranges annular III in, and bearing inner race closely laminates with rubber seal III.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921147250.2U CN210344284U (en) | 2019-07-22 | 2019-07-22 | Mechanical sealing device of high-speed high-pressure hydraulic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921147250.2U CN210344284U (en) | 2019-07-22 | 2019-07-22 | Mechanical sealing device of high-speed high-pressure hydraulic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210344284U true CN210344284U (en) | 2020-04-17 |
Family
ID=70215190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921147250.2U Withdrawn - After Issue CN210344284U (en) | 2019-07-22 | 2019-07-22 | Mechanical sealing device of high-speed high-pressure hydraulic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210344284U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307340A (en) * | 2019-07-22 | 2019-10-08 | 新乡市华航航空液压设备有限公司 | A kind of mechanically-sealing apparatus of high speed and high pressure hydraulic pump |
| CN113745870A (en) * | 2021-08-24 | 2021-12-03 | 西安交通大学 | Center current-carrying guide rod and high-voltage power transmission equipment |
-
2019
- 2019-07-22 CN CN201921147250.2U patent/CN210344284U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307340A (en) * | 2019-07-22 | 2019-10-08 | 新乡市华航航空液压设备有限公司 | A kind of mechanically-sealing apparatus of high speed and high pressure hydraulic pump |
| CN110307340B (en) * | 2019-07-22 | 2024-03-22 | 新乡市华航航空液压设备有限公司 | Mechanical sealing device of high-speed high-pressure hydraulic pump |
| CN113745870A (en) * | 2021-08-24 | 2021-12-03 | 西安交通大学 | Center current-carrying guide rod and high-voltage power transmission equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200417 Effective date of abandoning: 20240322 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200417 Effective date of abandoning: 20240322 |