CN104002229A - Hydraulic geometrical shape grinding device for static slip ring of hydrodynamic mechanical seal - Google Patents
Hydraulic geometrical shape grinding device for static slip ring of hydrodynamic mechanical seal Download PDFInfo
- Publication number
- CN104002229A CN104002229A CN201410247464.2A CN201410247464A CN104002229A CN 104002229 A CN104002229 A CN 104002229A CN 201410247464 A CN201410247464 A CN 201410247464A CN 104002229 A CN104002229 A CN 104002229A
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- China
- Prior art keywords
- ring
- slip ring
- static slip
- mechanical seal
- static
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/27—Work carriers
Abstract
The invention relates to a hydraulic geometrical shape grinding device for the static slip ring of a hydrodynamic mechanical seal. Triangular racks (1) and the ring surface of a pressing ring (3) are clamped together through hexagonal socket bolts (5) and positioned through positioning pins (4) inside two contact ring surfaces; the static slip ring (2) is arranged on the inner ring surfaces of the triangular racks (1) in a sleeved mode, and one side ring surface of the static slip ring (2) is in contact with the lower end surface of the pressing ring (3). The hydraulic geometrical shape grinding device for the static slip ring of the hydrodynamic mechanical seal is concise in structure, convenient to mount and dismount and applicable to taper and waveness machining of the sealing pair of a high-precision-requirement and high-rigidity-material seal.
Description
Technical field: the present invention relates to the static slip ring waterpower of hydrodynamic mechanical seal geometry lapping device.
Background technology: hydrodynamic mechanical seal is the core component of pressurized-water reactor nuclear power plant reactor coolant pump (abbreviation shaft seal pump), it is one of key link of whole mechanical seal maintenance stable operation that static slip ring waterpower geometry is ground, the quality that static slip ring waterpower geometry is ground, directly affect the height of shaft seal pump controllable leak amount, be related to the safe and reliable operation of reactor.If sealing pair Grinding Quality is not high, controllable leak amount is excessive, will directly cause reactor shutdown, brings huge economic loss to nuclear power station, also can cause nuclear safety hidden danger when serious.The main chemical attack of processing method of sealing ring end face fluid dynamic pressure groove, spark machined, laser processing method etc. at present, chemical attack requirement rapidoprint hardness can not be too high, the micro-crack that the surface stress that spark machined produces causes can make the strength decreased of material, although laser processing method precision is higher, but easily produce processing crackle and metamorphic layer, intensity is reduced greatly, limit practical application, require for mechanical seal ring higher, produce processing crackle be definitely unallowed.
Summary of the invention:
The object of the invention is that open a kind of intensity is high, the static slip ring waterpower of the hydrodynamic mechanical seal geometry lapping device of good sealing effect.Technical scheme of the present invention is: the static slip ring waterpower of a kind of hydrodynamic mechanical seal geometry lapping device, together with Three-leg stand (1) is put together on by Allen bolt (5) with the anchor ring of hold-down ring (3), Three-leg stand (1) is installed in two alignment pin (4) location that contact in anchor ring with hold-down ring (3), and static slip ring (2) is sleeved on Three-leg stand (1) inner ring surface and a side ring surface of static slip ring (2) contacts equipped with hold-down ring (3) lower surface.
The invention has the beneficial effects as follows:
(1) the present invention forms the static slip ring waterpower of mechanical seal geometry lapping device by Three-leg stand and hold-down ring, alignment pin, Allen bolt, by adjusting the static slip ring deflection of Allen bolt pretightning force control, and coordinate grinding machine, complete grinding and the polishing of three taperings of static slip ring sealing surface and waviness at every turn, by adjusting alignment pin position, control the grinding of nine corrugated surfaces of static slip ring sealing surface.
(2) lapping device the present invention relates to is a kind of high accuracy processing method for mechanical seal sealing pair high hardness material, waterpower geometry, surface smoothness technological requirement are high, the present invention carries out grinding to the deflection of static slip ring cleverly, ensure that nine waviness are uniformly distributed on stationary ring, waviness grinding output controlling is at 5～10 microns, sealing mechanism is hydrodynamic effect, and the shallow chute of μ m level is when groove depth is only when poor several μ m, and leakage rate will vary widely.
(3) because of the particularity of main shaft seal running environment, under 293 DEG C of reactor main circuit system temperatures, system pressure 15.16MPa, high radiation operating condition, this lapping device makes full use of raw-material elastic deformation characteristic, avoids the inapplicable carbide alloy of chemical attack completely; The micro-crack that spark machined discharge head surface stress extremely difficult, that produce causes can make the strength decreased of material; Laser processing method, because of high-temperature effect, causes the change of sealing surfaces raw material mechanism, has a strong impact on sealing service life, and this device has been avoided above unfavorable factor completely, is 15.16MPa at pressure reduction, rotating speed 1500rmin
-1time, static slip ring can be controlled at sealing leak amount approximately 5～10L/h, and under operating condition, the projected life of static slip ring is at 40000 hours, much larger than other processes mechanical seal service life approximately 10000 hours.
(4) shaft seal pump is monopolized by European and American developed countries for a long time with the manufacturing market of hydrodynamic mechanical seal at present, by its technologic advance, China aspect the design and manufacture of hydrodynamic mechanical seal in passive state, domestic operation nuclear power generating sets main pump shaft sealing pair and the whole dependence on import of spare part.The exploitation of static slip ring waterpower geometry lapping device, by for the production domesticization of core main pump mechanical seal provides powerful guarantee, is from then on broken away from difficult situation under one's control.
Operation principle of the present invention: design feature of the present invention is that Three-leg stand supports and pretension Allen bolt arranged crosswise, make full use of bolt pretightening (about 20Nm) and control the deflection of sealing pair, room temperature is controlled at 20～25 DEG C, coordinate corresponding grinding agent, complete grinding and the polishing of three waviness of sealing pair and tapering simultaneously, the grinding output controlling of tapering is at 5～10 microns, by 2 adjustment alignment pin installation sites, 40 ° of each rotations, complete grinding and the polishing of all the other 6 waviness and tapering on sealing pair.The present invention is by adjusting the static slip ring of Allen bolt (5) pretightning force control (2) deflection, complete grinding and the polishing of three taperings of static slip ring (2) sealing surface and waviness at every turn, by adjusting alignment pin (4) position, control (2) nine corrugated surfaces of static slip ring and grind.
Brief description of the drawings
Fig. 1 is the static slip ring waterpower of hydrodynamic mechanical seal geometry lapping device cutaway view
Fig. 2 is Three-leg stand top view
Fig. 3 is static slip ring cutaway view
Fig. 4 is hold-down ring top view
Detailed description of the invention
The static slip ring waterpower of a kind of hydrodynamic mechanical seal geometry lapping device as shown in Figure 1, together with Three-leg stand 1 is put together on by Allen bolt 5 with the anchor ring of hold-down ring 3, Three-leg stand 1 is as shown in Figure 2 installed in two alignment pins 4 that contact in anchor ring with hold-down ring 3 and locates, and static slip ring 2 is as shown in Figure 3 sleeved on Three-leg stand 1 inner ring surface and a side ring surface of static slip ring 2 contacts equipped with hold-down ring 3 lower surfaces as shown in Figure 4.The present invention passes through to adjust Allen bolt 5 pretightning force controls static slip ring 2 deflections as shown in Figure 3, and coordinates grinding machine, completes grinding and the polishing of three taperings of sealing surface and waviness at every turn, by adjusting alignment pin 4 positions, controls nine corrugated surfaces and grinds.Under the operating condition of 293 DEG C of reactor main circuit system temperatures, system pressure 15.16MPa, the sealing pair that the present invention grinds out can be controlled at sealing leak amount approximately 5～10L/h.
Claims (1)
1. the static slip ring waterpower of a hydrodynamic mechanical seal geometry lapping device, it is characterized in that: together with Three-leg stand (1) is put together on by Allen bolt (5) with the anchor ring of hold-down ring (3), Three-leg stand (1) is installed in two alignment pin (4) location that contact in anchor ring with hold-down ring (3), and static slip ring (2) is sleeved on Three-leg stand (1) inner ring surface and a side ring surface of static slip ring (2) contacts equipped with hold-down ring (3) lower surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410247464.2A CN104002229B (en) | 2014-06-06 | 2014-06-06 | Hydraulic geometrical shape grinding device for static slip ring of hydrodynamic mechanical seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410247464.2A CN104002229B (en) | 2014-06-06 | 2014-06-06 | Hydraulic geometrical shape grinding device for static slip ring of hydrodynamic mechanical seal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104002229A true CN104002229A (en) | 2014-08-27 |
| CN104002229B CN104002229B (en) | 2017-05-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410247464.2A Active CN104002229B (en) | 2014-06-06 | 2014-06-06 | Hydraulic geometrical shape grinding device for static slip ring of hydrodynamic mechanical seal |
Country Status (1)
| Country | Link |
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| CN (1) | CN104002229B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110814861A (en) * | 2019-10-24 | 2020-02-21 | 湖南金箭新材料科技有限公司 | Repairing method for mechanical seal |
| CN113385991A (en) * | 2021-07-07 | 2021-09-14 | 哈尔滨电气动力装备有限公司 | Processing technology and processing equipment for sealing static ring of main pump shaft of shaft seal of nuclear power station |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58155168A (en) * | 1982-03-04 | 1983-09-14 | Fujikoshi Kikai Kogyo Kk | Apparatus for fixing polishing ceramic surface plate |
| US6354927B1 (en) * | 2000-05-23 | 2002-03-12 | Speedfam-Ipec Corporation | Micro-adjustable wafer retaining apparatus |
| CN201559048U (en) * | 2009-11-06 | 2010-08-25 | 南京德邦金属装备工程有限公司 | Titanium tube sheet seal surface sealing ring replacing clamp |
| CN102717331A (en) * | 2012-05-25 | 2012-10-10 | 胜方精密机械（浙江）有限公司 | Grinding clamp for determining surface by three points and locating along with shape and grinding method employing clamp |
| CN202592196U (en) * | 2012-02-13 | 2012-12-12 | 西安北方光电科技防务有限公司 | Grinding device for oil-way sealing ring |
| CN203394842U (en) * | 2013-07-09 | 2014-01-15 | 哈尔滨电气动力装备有限公司 | Sealing ring friction pair for hydrodynamic mechanical seal of reactor coolant pump |
| CN203887681U (en) * | 2014-06-06 | 2014-10-22 | 哈尔滨电气动力装备有限公司 | Hydraulic-power geometrical-shape grinding device for static slip ring of hydrodynamic mechanical seal |
-
2014
- 2014-06-06 CN CN201410247464.2A patent/CN104002229B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58155168A (en) * | 1982-03-04 | 1983-09-14 | Fujikoshi Kikai Kogyo Kk | Apparatus for fixing polishing ceramic surface plate |
| US6354927B1 (en) * | 2000-05-23 | 2002-03-12 | Speedfam-Ipec Corporation | Micro-adjustable wafer retaining apparatus |
| CN201559048U (en) * | 2009-11-06 | 2010-08-25 | 南京德邦金属装备工程有限公司 | Titanium tube sheet seal surface sealing ring replacing clamp |
| CN202592196U (en) * | 2012-02-13 | 2012-12-12 | 西安北方光电科技防务有限公司 | Grinding device for oil-way sealing ring |
| CN102717331A (en) * | 2012-05-25 | 2012-10-10 | 胜方精密机械（浙江）有限公司 | Grinding clamp for determining surface by three points and locating along with shape and grinding method employing clamp |
| CN203394842U (en) * | 2013-07-09 | 2014-01-15 | 哈尔滨电气动力装备有限公司 | Sealing ring friction pair for hydrodynamic mechanical seal of reactor coolant pump |
| CN203887681U (en) * | 2014-06-06 | 2014-10-22 | 哈尔滨电气动力装备有限公司 | Hydraulic-power geometrical-shape grinding device for static slip ring of hydrodynamic mechanical seal |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110814861A (en) * | 2019-10-24 | 2020-02-21 | 湖南金箭新材料科技有限公司 | Repairing method for mechanical seal |
| CN113385991A (en) * | 2021-07-07 | 2021-09-14 | 哈尔滨电气动力装备有限公司 | Processing technology and processing equipment for sealing static ring of main pump shaft of shaft seal of nuclear power station |
| CN113385991B (en) * | 2021-07-07 | 2022-08-30 | 哈尔滨电气动力装备有限公司 | Processing technology and processing equipment for sealing static ring of main pump shaft of shaft seal of nuclear power station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104002229B (en) | 2017-05-10 |
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