CN104265902B - A kind of mechanical sealing mechanism - Google Patents
A kind of mechanical sealing mechanism Download PDFInfo
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- CN104265902B CN104265902B CN201410480529.8A CN201410480529A CN104265902B CN 104265902 B CN104265902 B CN 104265902B CN 201410480529 A CN201410480529 A CN 201410480529A CN 104265902 B CN104265902 B CN 104265902B
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- jaw
- main shaft
- dome
- ring
- round rod
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
Abstract
The present invention discloses a kind of mechanical sealing mechanism.It comprises main shaft, and be characterized in that the outer section circumference of main shaft is evenly equipped with longitudinal convex tendon, the inner segment of main shaft is round bar, and excessively tapered between longitudinal convex tendon and round bar outer side surface, and excessively the circumferential width of longitudinal convex tendon at place broadens gradually from its spline segment to round rod segment.The splined shaft of contiguous transition position has circular groove and spacing back-up ring, and outside spacing back-up ring, cover has interstage sleeve.Interstage sleeve outer end circumference has radial inner raised edge, and radially the inside edge circumference of inner raised edge has the groove with longitudinal convex tendon adaptation, the external diameter of spacing back-up ring to be greater than the internal diameter of described radial inner raised edge.On the round rod segment of described main shaft, cover has lower three-jaw, spring, upper three-jaw, an O shape circle, rotating ring and stationary ring successively from inside to outside, has the 2nd O shape circle between stationary ring and motor cabinet, and in the mounted state, described 2nd O shape circle offsets with the axis hole surrounding of motor cabinet.Maintenance rate of the present invention is low, and user cost is low.Be applicable to the sealing between the motor cabinet of vertical water pump and pump head.
Description
Technical field
The present invention relates to a kind of sealing mechanism.Specifically, be mechanical sealing mechanism between the motor cabinet of vertical water pump and pump head.
Background technique
At present, the sealing mechanism between the motor cabinet of vertical water pump and pump head is all traditional mechanical sealing mechanism.This mechanical sealing mechanism comprises a flexible bellow, and the two ends of flexible bellow are all connected with the short pipe formed as one with it, and the external diameter of short pipe is equal and be greater than its intermediate section external diameter.The short pipe of described flexible bellow one end is the short pipe of rigidity, and the short pipe of rigidity has lower three-jaw in fixing shape cover, and three pawls of described lower three-jaw evenly process three rectangle gap in pipe one end circumference and formed, and three pawls of described lower three-jaw all inwardly.The short pipe inner sleeve of the described flexible bellow the other end has upper three-jaw, three pawls of described upper three-jaw evenly process three rectangle gap in pipe one end circumference and formed, three pawls of described upper three-jaw all towards three pawls of lower three-jaw, and and gap between the adjacent pawl of lower three-jaw suitable.Be provided with spring between lower three-jaw and upper three-jaw, both ends of the spring offsets with the short pipe at flexible bellow two ends respectively.Under installment state, described main shaft penetrates in flexible bellow, and overlaps on that section of main shaft adjacent with motor cabinet and have stationary ring, described stationary ring cylindrical has two circumferential step, to make one section, the two ends external diameter of stationary ring be less than its intermediate section, and cover has O shape to enclose on one end segment of stationary ring.Under working state, by the compression between flexible bellow two ends, be out of shape by the ripple on bellows and realize sealing.Because described flexible bellow can only be made by the nonmetallic material of rubber and so on usually, easy aging distortion.Once flexible bellow distortion, when the unexpected gas of water pump starts, easily there is water leakage situation.Therefore, once flexible bellow damages, just need change whole mechanical sealing mechanism, not only maintenance rate is high, also improves user cost.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of mechanical sealing mechanism.This mechanical sealing mechanism, maintenance rate is low, and user cost is low.
The problems referred to above that the present invention will solve are realized by following technological scheme:
Mechanical sealing mechanism of the present invention comprises main shaft, be characterized in that the outer section circumference of described main shaft is evenly equipped with the longitudinal convex tendon for making this section form spline segment, the inner segment of main shaft is round rod segment, and excessively tapered between longitudinal convex tendon and round rod segment outer side surface, and excessively the circumferential width of longitudinal convex tendon at place broadens gradually from its spline segment to round rod segment.The spline segment of contiguous described transition position has circular groove, limited location back-up ring in circular groove, and outside spacing back-up ring, cover has interstage sleeve.The circumference of described interstage sleeve outer end has radial inner raised edge, and radially the inside edge circumference of inner raised edge has the groove with the longitudinal convex tendon adaptation on described splined shaft outer side surface, and the external diameter of described spacing back-up ring is greater than the internal diameter of described radial inner raised edge.On the round rod segment of described main shaft, cover has lower three-jaw, spring, upper three-jaw, an O shape circle, rotating ring and stationary ring successively from inside to outside, has the 2nd O shape circle between stationary ring and motor cabinet, and in the mounted state, described 2nd O shape circle offsets with the axis hole surrounding of motor cabinet.
Wherein:
Described lower three-jaw comprises the first dome, has the axis hole with the round rod segment adaptation of main shaft at the bottom of the lid of the first dome, and described first dome is that moving type is enclosed within the round rod segment of main shaft by this axis hole, and near spacing back-up ring side at the bottom of the lid of the first dome.The oral area circumference of described first dome is evenly equipped with three the first axial chimbs for the formation of lower three-jaw.
Described upper three-jaw comprises the second dome, has the axis hole with the round rod segment adaptation of main shaft at the bottom of the lid of the second dome, and described second dome is that moving type is enclosed within the round rod segment of main shaft by this axis hole.Adjacent springs side at the bottom of described second dome lid also offsets with spring one end, and the oral area of described second dome is evenly equipped with three the second axial chimbs, and these three the second axial chimbs all outwards double flat, to form upper three-jaw.The circular arc degree of described upper three-jaw is equal with the circular arc degree of described lower three-jaw, makes the external diameter of the two equal; A described O shape circle is on the round rod segment in the second dome.
The cross section of described rotating ring is rectangle, has gap between the round rod segment of main shaft described in its inner circle, the cylindrical of described rotating ring is evenly equipped with three radial boss, and the diameter of described radial boss is greater than the external diameter of the second dome and is less than the external diameter of described upper three-jaw.
The outside diameter of described stationary ring is all less than the internal diameter of three-jaw and lower three-jaw.The cylindrical of stationary ring has two circumferential step, to make one of stationary ring two ends section of outside diameter all be less than the intermediate section external diameter of stationary ring.The internal diameter of described 2nd O shape circle is less than that section of stationary ring external diameter outside circumferential step, and described 2nd O shape circle is enclosed within that section of stationary ring outside circumferential step in tight shape.
Take such scheme, have the following advantages:
As can be seen from the above scheme, owing to the present invention includes main shaft, the outer section circumference of described main shaft is evenly equipped with the longitudinal convex tendon for making this section of formation splined shaft, the inner segment of main shaft is round bar, and excessively tapered between longitudinal convex tendon and round bar outer side surface, and excessively the circumferential width of longitudinal convex tendon at place broadens gradually from its spline segment to round rod segment.The splined shaft of contiguous described transition position has circular groove, limited location back-up ring in circular groove, and outside spacing back-up ring, cover has interstage sleeve.The circumference of described interstage sleeve outer end has radial inner raised edge, and radially the inside edge circumference of inner raised edge has the groove with the longitudinal convex tendon adaptation on described splined shaft outer side surface, and the external diameter of described spacing back-up ring is greater than the internal diameter of described radial inner raised edge.On the round rod segment of described main shaft, cover has lower three-jaw, spring, upper three-jaw, an O shape circle, rotating ring and stationary ring successively from inside to outside, has the 2nd O shape circle between stationary ring and motor cabinet, and in the mounted state, described 2nd O shape circle offsets with the axis hole surrounding of motor cabinet.Except first, second seal ring, all parts are all metal partss, not fragile.Damage if there is that O shape circle in first, second O shape circle, enclose as long as change that O shape of damaging, compared with background technique, do not need to change whole mechanical sealing mechanism, thus greatly reduce maintenance expenses, reduce user cost.Again due to really seal be first, second O shape circle, and O shape circle cross section little, not yielding, make water pump antileaking.
Accompanying drawing explanation
Fig. 1 is mechanical sealing mechanism schematic diagram of the present invention.
Embodiment
As shown in Figure 1, mechanical sealing mechanism of the present invention comprises main shaft, the outer section circumference of described main shaft is evenly equipped with the longitudinal convex tendon 18 for making this section form spline segment 2, the inner segment of main shaft is round rod segment 14, and excessively tapered between longitudinal convex tendon 18 and round rod segment 14 outer side surface, the circumferential width of longitudinal convex tendon 18 at described excessive place broadens to round rod segment 14 gradually from its spline segment 2.The spline segment of contiguous described transition position is processed with circular groove, and be provided with spacing back-up ring 4 in circular groove, the outer surface cover of spacing back-up ring 4 has interstage sleeve 3.The circumference of described interstage sleeve 3 outer end is processed with radial inner raised edge 17, radially the inside edge circumference of inner raised edge 17 is processed with the groove with longitudinal convex tendon 18 adaptation on described spline segment 2 outer side surface, and the external diameter of described spacing back-up ring 4 is greater than the internal diameter of described radial inner raised edge 17.On the round rod segment 14 of described main shaft, cover has lower three-jaw, spring 6, upper three-jaw, an O shape circle 9, rotating ring 10 and stationary ring 11 successively from inside to outside, be provided with the 2nd O shape between stationary ring 11 and motor cabinet 13 and enclose 12, in the mounted state, described 2nd O shape circle 12 offsets with the axis hole surrounding of motor cabinet 13.
Described lower three-jaw comprises the first dome 5, the axis hole with round rod segment 14 adaptation of main shaft is processed with at the bottom of the lid of the first dome 5, described first dome 5 is that moving type is enclosed within the round rod segment 14 of main shaft by this axis hole, and near spacing back-up ring 4 side at the bottom of the lid of the first dome 5.The oral area circumference of described first dome 5 is evenly equipped with three the first axial chimbs 16 for the formation of lower three-jaw.
Described upper three-jaw comprises at the bottom of the lid of the second dome 8, second dome 8 and is processed with the axis hole with round rod segment 14 adaptation of main shaft, and described second dome 8 is that moving type is enclosed within the round rod segment 14 of main shaft by this axis hole.Described second dome 14 covers end adjacent springs 6 side and offsets with spring 6 one end, and the oral area of described second dome 8 is evenly equipped with three the second axial chimbs 7, and these three the second axial chimbs all outwards double flat, to form upper three-jaw.The circular arc degree of described upper three-jaw is equal with the circular arc degree of described lower three-jaw, makes the external diameter of the two equal.In intercross arrangement between described three the second axial chimbs 7 and three the first axial chimbs 16, and three the second axial chimbs 7 stretch in the spacing between adjacent first axial chimb 16 respectively.
A described O shape circle 9 is on the round rod segment 14 in the second dome 8.
The cross section of described rotating ring 10 is rectangle, gap is left between the round rod segment 14 of its inner circle and described main shaft, the cylindrical of described rotating ring 10 is evenly equipped with three radial boss 15, the diameter of described radial boss 15 is greater than the external diameter of the second dome 8 and is less than the first axial chimb 16 external diameter of described upper three-jaw.
The outside diameter of described stationary ring 11 is all less than the first axial chimb 16 of three-jaw and the second axial chimb 7 internal diameter of lower three-jaw.The cylindrical of stationary ring 11 is processed with two circumferential step, to make one section of outside diameter at stationary ring 11 two ends all be less than the intermediate section external diameter of stationary ring 11.The internal diameter of described 2nd O shape circle 12 is less than that section of stationary ring 11 external diameter outside circumferential step, and described 2nd O shape circle 12 is enclosed within that section of stationary ring 11 outside circumferential step in tight shape.
Under using state, inner segment and the round rod segment 14 of described main shaft stretch in motor cabinet 13, and make to be combined together in sealing shape between stationary ring 11 and motor cabinet 13 by the 2nd O shape circle 12.Outer section and the spline segment 2 of main shaft stretch in pump seat 1, and make to offset with described interstage sleeve 3 upper end bottom pump seat 1.
Claims (5)
1. a mechanical sealing mechanism, comprise main shaft, it is characterized in that the outer section circumference of described main shaft is evenly equipped with the longitudinal convex tendon (18) for making this section form spline segment (2), the inner segment of main shaft is round rod segment (14), and tapered transition between longitudinal convex tendon (18) and round rod segment (14) outer side surface, the circumferential width of longitudinal convex tendon (18) of transition position broadens to round rod segment (14) gradually from its spline segment (2); The spline segment (2) of contiguous described transition position has circular groove, limited location back-up ring (4) in circular groove, and spacing back-up ring (4) outer surface cover has interstage sleeve (3); The circumference of described interstage sleeve (3) outer end has radial inner raised edge (17), radially the inside edge circumference of inner raised edge (17) has the groove adaptive with the longitudinal convex tendon (18) on described spline segment (2) outer side surface, and the external diameter of described spacing back-up ring (4) is greater than the internal diameter of described radial inner raised edge (17); On the round rod segment (14) of described main shaft, cover has lower three-jaw, spring (6), upper three-jaw, O shape circle (9), rotating ring (10) and stationary ring (11) successively from inside to outside, the 2nd O shape is had to enclose (12) between stationary ring (11) and motor cabinet (13), in the mounted state, described 2nd O shape circle (12) offsets with the axis hole surrounding of motor cabinet (13).
2. mechanical sealing mechanism according to claim 1, it is characterized in that described lower three-jaw comprises the first dome (5), the axis hole adaptive with the round rod segment of main shaft (14) is had at the bottom of the lid of the first dome (5), described first dome (5) is that moving type is enclosed within the round rod segment (14) of main shaft by this axis hole, and near spacing back-up ring (4) side at the bottom of the lid of the first dome (5); The oral area circumference of described first dome (5) is evenly equipped with three the first axial chimbs (16) for the formation of lower three-jaw.
3. mechanical sealing mechanism according to claim 1, it is characterized in that described upper three-jaw comprises the second dome (8), have the axis hole adaptive with the round rod segment of main shaft (14) at the bottom of the lid of the second dome (8), described second dome (8) is that moving type is enclosed within the round rod segment (14) of main shaft by this axis hole; Described second dome (8) lid adjacent springs (6) side, the end also offsets with spring (6) one end, the oral area of described second dome (8) is evenly equipped with three the second axial chimbs (7), these three the second axial chimbs (7) all outwards double flat, to form upper three-jaw; The circular arc degree of described upper three-jaw is equal with the circular arc degree of described lower three-jaw, makes the external diameter of the two equal; Described O shape circle (9) is on the round rod segment (14) in the second dome (8).
4. mechanical sealing mechanism according to claim 1, it is characterized in that the cross section of described rotating ring (10) is rectangle, gap is had between the round rod segment (14) of its inner circle and described main shaft, the cylindrical of described rotating ring (10) is evenly equipped with three radial boss (15), the diameter of described radial boss (15) is greater than the external diameter of the second dome (8) and is less than the external diameter of described upper three-jaw.
5. mechanical sealing mechanism according to claim 1, is characterized in that the outside diameter of described stationary ring (11) is all less than the internal diameter of three-jaw and lower three-jaw; The cylindrical of stationary ring (11) has two circumferential step, to make one section of outside diameter at stationary ring (11) two ends all be less than the intermediate section external diameter of stationary ring (11); The internal diameter of described 2nd O shape circle (12) is less than that section of stationary ring (11) external diameter outside circumferential step, and described 2nd O shape circle (12) is enclosed within tight shape on that section of stationary ring (11) outside circumferential step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410480529.8A CN104265902B (en) | 2014-09-19 | 2014-09-19 | A kind of mechanical sealing mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410480529.8A CN104265902B (en) | 2014-09-19 | 2014-09-19 | A kind of mechanical sealing mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104265902A CN104265902A (en) | 2015-01-07 |
| CN104265902B true CN104265902B (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410480529.8A Active CN104265902B (en) | 2014-09-19 | 2014-09-19 | A kind of mechanical sealing mechanism |
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| CN (1) | CN104265902B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108791797A (en) * | 2018-08-21 | 2018-11-13 | 天津长瑞大通流体控制系统有限公司 | Sealing structure and method between the positive and negative rotation swinging axle and cabin shell of latent sea device crossing cabin |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2462151Y (en) * | 2000-09-20 | 2001-11-28 | 中国石化集团扬子石油化工有限责任公司 | Torque arm mechanical sealing element of pressure centrifugal |
| JP5701499B2 (en) * | 2009-12-03 | 2015-04-15 | Ntn株式会社 | Seal surface processing method |
| CN202125611U (en) * | 2011-05-24 | 2012-01-25 | 昆明五威科工贸有限公司 | Large-depth underwater inner shaft and outer shaft mechanical seal device |
| EP2726764B1 (en) * | 2011-06-30 | 2016-02-03 | Carrier Corporation | Locking shaft seal support and methods |
| CN202812212U (en) * | 2012-09-07 | 2013-03-20 | 宁波精科机械密封件制造有限公司 | Corrosion resistant mechanical seal device |
| CN103791095B (en) * | 2014-03-06 | 2016-05-18 | 重庆广播电视大学 | Automatically the mechanical seal assembly of pretension |
| CN204042003U (en) * | 2014-09-19 | 2014-12-24 | 无锡太博泵业有限公司 | A kind of mechanical sealing mechanism |
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- 2014-09-19 CN CN201410480529.8A patent/CN104265902B/en active Active
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| CN104265902A (en) | 2015-01-07 |
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