CN101725794B - Method and device for resisting erosions of overflowing end face of mechanical sealing flange - Google Patents
Method and device for resisting erosions of overflowing end face of mechanical sealing flange Download PDFInfo
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- CN101725794B CN101725794B CN 200810201061 CN200810201061A CN101725794B CN 101725794 B CN101725794 B CN 101725794B CN 200810201061 CN200810201061 CN 200810201061 CN 200810201061 A CN200810201061 A CN 200810201061A CN 101725794 B CN101725794 B CN 101725794B
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- face
- mechanical sealing
- sealing flange
- flange
- wear ring
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- 238000007789 sealing Methods 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000003628 erosive effect Effects 0.000 title claims abstract description 28
- 239000000463 material Substances 0.000 claims description 10
- 230000002687 intercalation Effects 0.000 claims description 9
- 238000009830 intercalation Methods 0.000 claims description 9
- 230000000295 complement effect Effects 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 239000002002 slurry Substances 0.000 abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000002893 slag Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 208000001840 Dandruff Diseases 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005360 mashing Methods 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
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Abstract
The invention relates to a method and a device for resisting erosions of an overflowing end face of a mechanical sealing flange, belonging to the field of non vary-volume type pumps. The invention adopts the technical scheme that a wear ring is prefabricated, and the sizes of the inner diameter and the outer diameter of the wear ring are matched with the overflowing end face of the mechanical sealing flange; one end face of the wear ring and the overflowing end face of the mechanical sealing flange are respectively and correspondingly provided with a matched boss and a matched concave hole structure; and the prefabricated wear ring is embedded on the overflowing end face of the mechanical sealing flange by adopting an interference fit method so as to improve the erosion resistant capacity of the overflowing end face of the mechanical sealing flange. The invention is easy to apply, uses fewer equipment and tools, has simple manufacture process and steps, can be applied to large-area use occasions, has low cost, high bonding strength between the wear ring and the mechanical sealing flange and reliable work and can greatly prolong the service life of slurry conveying pumps. The invention also provides a device for resisting erosions of the overflowing end face of the mechanical sealing flange, which can be widely applied to the field of the manufactures of various slurry/slag slurry conveying pumps.
Description
Technical field
The present invention relates to the non-varactor pump field, relate in particular to mechanical seal and the annex thereof of pump.
Background technique
In present thermoelectricity fume wet type desulphurization slurry circulating pump, slurries excavationg pump, lime slurry pump and method of slurry pumps for mines, generally have pump case 1, impeller 2, pump cover 3 and be installed in the mechanical sealing flange 5 that on the pump cover 3 pump shaft 4 sealed (some pump is the structure that pump case 1 and pump cover 3 are made of one), as shown in Figure 1.
(weight percentage can reach more than 35% because the concentration of solid particles of the pumping liquid of this type of pump is usually higher, linear velocity can reach more than the 15m/s), therefore cause the high concentration particle that a part flows between pump cover 3 and the impeller 2 in the slurries to rotate around pump shaft 4 on one side, overflowing end face 5a (referring to Fig. 3) with respect to the mechanical sealing flange 5 that pump shaft 4 is sealed does the relatively wearing and tearing campaign of high speed on one side, overflowing end face to mechanical sealing flange carries out erosion (wearing and tearing), blacking partly is by the erosion zone among the figure, this weight eroded can reach more than 3 millimeters/month, regional until will give fastening clamping bolt 6 places between mechanical sealing flange 5 and the pump cover 3 by erosion, wearing and tearing, worn out bolt hole (not shown), make that slurries leak in a large number in the in running order pump, must change mechanical sealing flange 5 this moment.Thus, cause only have 2～3 months the working life of whole mechanical sealing flange, can't satisfy the warranty more than 1 year.
This situation has existed for many years, and the direct economic loss of bringing for user, pump manufacturer, mechanical seal manufactory can't be estimated.
, erosion resistance wear-resisting for the overflowing end face that makes above-mentioned mechanical sealing flange, improve working life, at present the method for the common mechanical seal for pump flange resisting erosions of overflowing end face of taking, mostly adopt the methods such as built-up welding, bonding or surface treatment (such as nitriding), by the wearing layer direct combination wear-resistant, that corrosion-resistant material is made on the overflowing end face of mechanical sealing flange, but welding method has increased use equipment and other instrument etc., manufacture cost is high, and it is not suitable for large-area use occasion; Though bonding method is simple, its adhesive strength is lower, and reliability is not high, and the wearing layer that is compounded on the overflowing end face of mechanical sealing flange easily comes off, and also affects the working life of mechanical sealing flange; The wear-resisting property of surface preparation is not good, and the thickness of its high hardness layer is too thin, and be affected working life.
Summary of the invention
Goal of the invention of the present invention is, a kind of method of resisting erosions of overflowing end face of flange of mechanical sealing flange is provided, it is easy to implement, used equipment and instrument are few, and manufacturing process and step are simple, can be used for large-area use occasion, with low cost, the bond strength of wear ring and mechanical sealing flange is high, and reliable operation can prolong working life of slurries class transfer pump greatly.
Another purpose of the present invention is, a kind of resisting erosions of overflowing end face of mechanical sealing flange device is provided, it can make the overflowing end face of mechanical sealing flange scurf resistance that is installed on the pump cover greatly improve, thereby makes slurries avoid the tapped hole leakage from the clamping bolt between fastening mechanical sealing flange and the pump cover, the working life of prolonged mechanical sealing flange.
For achieving the above object, the invention provides a kind of method of resisting erosions of overflowing end face of flange of mechanical sealing flange, the overflowing end face that is included in mechanical sealing flange forms a high hardness wear-resisting layer, it is characterized in that: make in advance a wear ring (D), the overflowing end face (5a) of its dimension of inner and outer diameters and described mechanical sealing flange (5) is complementary; At an end face (D1) of wear ring (D) and the overflowing end face (5a) of mechanical sealing flange (5), corresponding boss, the shrinkage pool structure that is complementary that arrange respectively; Adopt the method for interference fit, prefabricated wear ring (D) is embedded on the overflowing end face (5a) of described mechanical sealing flange (5), to improve the anti-erosion property of described overflowing end face of mechanical sealing flange.
Concrete, the interior bore edges of an end face (D1) of described wear ring (D) forms boss (D2), and the overflowing end face (5a) of the flange of described mechanical sealing flange (5t) is made inward recess (5b); The external diameter of wear ring is made identical with the external diameter of mechanical sealing flange flange; Then, make boss (D2) external diameter interference fit ground intercalation that the overflowing end face (5a) of wear ring one end face (D1) and mechanical sealing flange is close to and makes wear ring in the inward recess (5b) of overflowing end face of mechanical sealing flange (5a), thereby wear ring is embedded on the mechanical sealing flange.
Further, at the close external diameter end of the overflowing end face of described mechanical sealing flange flange, process groove ring (5c), be embedded in seal ring (h) at this groove ring.
Further, on arbitrary end face in described wear ring one end face and described overflowing end face of mechanical sealing flange, evenly coat the binder (j) that will be bonded together between them, when both interference fit ground intercalations together the time, binder consists of bonding layer.
The hardness that it consists of the hard material of described wear ring is higher than the hardness of the hard material that consists of mechanical sealing flange.
Its described hard material is pottery.
Concrete, its hard material is silicon carbide ceramics.
For achieving the above object, the present invention also provides a kind of resisting erosions of overflowing end face of mechanical sealing flange device, it is characterized in that: at the whole overflowing end face of described mechanical sealing flange (5), inlay a wear ring (D) is set.
At an end face (D1) of wear ring (D) and the overflowing end face (5a) of mechanical sealing flange (5), correspondence is provided with boss, the shrinkage pool structure that is complementary respectively.
At an end face of the flange of described mechanical sealing flange, be provided with groove ring (5c) near the external diameter end, be embedded with seal ring (h) at this groove ring.
Technological scheme of the present invention, utilize the ground intercalation of wear ring interference fit in the inward recess of overflowing end face of mechanical sealing flange, thereby make the mechanical sealing flange that is inlaid with wear ring, this mechanical sealing flange is installed on the pump cover with bolt, just can improves significantly the working life of the mechanical sealing flange of pump.
And, compare Anti-erosion method in the past, the method for this resisting erosions of overflowing end face of mechanical sealing flange is very simple, employed equipment and instrument are few, and manufacturing process and step are simple, can reduce manufacture cost, and the joint of wear ring and mechanical sealing flange very firmly, reliably.
Description of drawings
Fig. 1 represents that the overflowing end face of mechanical sealing flange of pump in the past is subject to containing the schematic diagram of solid particle slurries erosion situation.
Fig. 2 is the sectional view for explanation resisting erosions of overflowing end face of mechanical sealing flange method of the present invention.
Fig. 3 is the sectional view for explanation resisting erosions of overflowing end face of mechanical sealing flange method of the present invention.
Fig. 4 is the sectional view of the mechanical seal for pump flange after expression wear ring of the present invention is embedded on the mechanical sealing flange.
Fig. 5 mechanical sealing flange that to be expression be inlaid with wear ring with the present invention is with the local structural graph of bolton after on the pump cover.
Embodiment
Resisting erosions of overflowing end face of mechanical sealing flange method of the present invention now is described with reference to the accompanying drawings.
As shown in Figure 2, in technological scheme of the present invention, by the interference fit method, ready-made wear ring D is embedded on mechanical sealing flange 5 overflowing end faces (5a), makes this mechanical seal overflowing end face have the Anti-erosion function.
In addition, the interior bore edges of the end face D1 of wear ring D can be formed boss D2, the overflowing end face 5a of the flange 5t of mechanical sealing flange 5 makes inward recess 5b.
In addition, the external diameter of wear ring D is made identical with the external diameter of mechanical sealing flange 5 flange 5t, and the inward recess 5b internal diameter of mechanical sealing flange 5 made the boss D2 external diameter that is slightly smaller than wear ring D; Namely the boss D2 external diameter of the inward recess 5b internal diameter of mechanical sealing flange 5 and wear ring D is made interference fit.
When being pressed into the boss D2 of wear ring 5 in the inward recess 5b with certain force, can overcoming the interference resistance and wear ring D one end face D1 and mechanical sealing flange 5 overflowing end face 5a are fitted.
Then, the boss D2 external diameter interference fit ground intercalation that wear ring D one end face D1 and mechanical sealing flange 5 overflowing end face 5a is close to and makes wear ring D in the inward recess 5b of mechanical sealing flange 5 overflowing end face 5a, thereby wear ring D is embedded on the mechanical sealing flange 5.
In other words, exterior edge face at wear ring D (supposes that wear ring is interior edge face with respect to the one side of pump case inside, then its one side towards mechanical sealing flange is the exterior edge face) with the overflowing end face 5a of mechanical sealing flange 5, corresponding boss, the shrinkage pool structure that is complementary that arrange respectively, the boss D2 interference fit ground intercalation of its wear ring is in the inward recess 5b of overflowing end face of mechanical sealing flange 5a.
In above-mentioned the inventive method, preferably as shown in Figure 3, at the overflowing end face 5a of mechanical sealing flange 5 flange 5t, process groove ring 5c near the external diameter end, 5c is embedded in seal ring h at this groove ring.
In addition, in above-mentioned technological scheme, preferably as shown in Figure 4, on arbitrary end face in wear ring D one end face D1 and mechanical sealing flange 5 overflowing end face 5a (referring to Fig. 3), evenly coat the binder j that to be bonded together between them, then, the boss D2 external diameter interference fit ground intercalation that wear ring D one end face D1 and mechanical sealing flange 5 overflowing end face 5a is close to and makes wear ring D is made the mechanical seal for pump flange 5 that is inlaid with wear ring D as shown in Figure 4 in the inward recess 5b of mechanical sealing flange 5 overflowing end face 5a.
In each above-mentioned method, wear ring D with hardness ratio mechanical sealing flange 5 also hard hard material make the optional pottery of its hard material (such as silicon carbide ceramics).
With so being inlaid with the mechanical seal for pump flange 5 of wear ring, be installed on the pump cover 3 with bolt 6 (referring to Fig. 5), just can improve significantly the working life of mechanical sealing flange 5.
In technique scheme, only make wear ring one end face form boss, and at mechanical sealing flange one end face formation inward recess, by with the ground intercalation of the boss interference fit of wear ring one end face in the inward recess of overflowing end face of mechanical sealing flange, just can be made into the mechanical sealing flange that is inlaid with wear ring, make this mechanical sealing flange have the Anti-erosion function, this method compare in the past wear ring is compounded in method on the mechanical sealing flange with built-up welding or bonding method, method is very simple, employed equipment and instrument are few, and manufacturing process and step are simple, can reduce manufacture cost, and the joint of wear ring and mechanical sealing flange is very firm, reliably, long service life.
Referring now to Fig. 2 to Fig. 5 resisting erosions of overflowing end face of mechanical sealing flange device of the present invention is described.
As shown in Figure 4, the whole overflowing end face of mechanical sealing flange 5 is inlaid with wear ring D.In addition, at an end face of the flange of this mechanical sealing flange 5, be formed with groove ring 5c near the external diameter end, 5c has been embedded in seal ring h at this groove ring.Like this, can prevent that the slurries in the pump from leaking into an end face and the described wear ring junction plane place of described mechanical sealing flange, leak into again phenomenon outside the pump cover from the tapped hole of clamping bolt 6.
Be sleeved on the pump shaft 4 at the mechanical sealing flange that is inlaid with wear ring D 5 with above-mentioned the sort of structure, and after being fastened on this mechanical sealing flange 5 on the pump cover 3 with bolt 6, be embedded in wear ring on the whole overflowing end face of mechanical sealing flange just tolerates a part in pump and flows into the erosion that contains the solid particle slurries between pump cover 3 and the impeller 2 very much, avoid the whole overflowing end face of mechanical sealing flange directly to be subjected to the erosion of solid particle slurries, can greatly prolong the life-span of the mechanical sealing flange of slurry pump, mashing pump or method of slurry pumps for mines.
To sum up, owing to being compounded in wear ring on the overflowing end face of mechanical sealing flange by pressure extrusion, consisted of a thickness at the high hardness wear-resisting layer of grade or Centimeter Level, therefore involved manufacturing equipment will lack than " welding method ", cheap for manufacturing cost, applicable to large-area use occasion; Adopt the matching way of interference fit, the combination force between wear ring and the mechanical sealing flange is strong, and the mechanical strength of connecting part is higher than simple " bonding method ", has avoided coming off of wearing layer; The high hardness wear-resisting layer thickness can be controlled at grade or Centimeter Level as required, is much better than " surface preparation " (thickness of " surface preparation " formed high hardness layer is at micron order usually), has increased widely its wear-resisting property; The integrated use of above-mentioned measure can be avoided many drawbacks of prior art, working life of extension device widely helps to reduce the manufacture cost of pump, saves operation and maintenance cost.
The present invention can be widely used in the manufacturing field of various slurries/slag slurry transfer pump.
Claims (5)
1. the method for the resisting erosions of overflowing end face of the flange of a mechanical sealing flange comprises by wear ring forming a high hardness wear-resisting layer at the overflowing end face of the flange of mechanical sealing flange, it is characterized in that:
Make in advance a wear ring (D), the overflowing end face (5a) of the flange (5t) of the dimension of inner and outer diameters of wear ring and described mechanical sealing flange (5) is complementary;
At the end face (D1) of wear ring (D) overflowing end face (5a) with the flange (5t) of mechanical sealing flange (5), corresponding boss, the inward recess structure that is complementary that arrange respectively;
Adopt the method for interference fit, prefabricated wear ring (D) is embedded on the overflowing end face (5a) of flange (5t) of described mechanical sealing flange (5), with the erosion resistance of the overflowing end face of the flange that improves described mechanical sealing flange;
Wherein, consist of the hardness of the hard material of described wear ring, be higher than the hardness of mechanical sealing flange;
The hard material that consists of described wear ring is pottery.
2. the method for the resisting erosions of overflowing end face of the flange of mechanical sealing flange as claimed in claim 1 is characterized in that,
The interior bore edges of one end face (D1) of described wear ring (D) forms boss (D2);
The overflowing end face (5a) of the flange (5t) of described mechanical sealing flange (5) is made inward recess (5b);
The external diameter of wear ring is made identical with the external diameter of the flange (5t) of mechanical sealing flange (5);
Then, make boss (D2) external diameter interference fit ground intercalation that the overflowing end face (5a) of the flange (5t) of wear ring one end face (D1) and mechanical sealing flange (5) is close to and makes wear ring in the inward recess (5b) of the overflowing end face (5a) of the flange (5t) of mechanical sealing flange (5), thereby wear ring is embedded on the mechanical sealing flange.
3. the method for the resisting erosions of overflowing end face of the flange of mechanical sealing flange as claimed in claim 2, it is characterized in that, near the external diameter end, process groove ring (5c) at the overflowing end face of the flange (5t) of described mechanical sealing flange, be embedded in seal ring (h) at this groove ring.
4. the method for the resisting erosions of overflowing end face of the flange of mechanical sealing flange as claimed in claim 1, it is characterized in that, on arbitrary end face in the overflowing end face of the flange of described wear ring one end face and described mechanical sealing flange, evenly coat the binder (j) that to be bonded together between them, when both interference fit ground intercalations together the time, binder consists of bonding layer.
5. the method for the resisting erosions of overflowing end face of the flange of mechanical sealing flange as claimed in claim 1 is characterized in that, the hard material that consists of described wear ring is silicon carbide ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810201061 CN101725794B (en) | 2008-10-10 | 2008-10-10 | Method and device for resisting erosions of overflowing end face of mechanical sealing flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810201061 CN101725794B (en) | 2008-10-10 | 2008-10-10 | Method and device for resisting erosions of overflowing end face of mechanical sealing flange |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101725794A CN101725794A (en) | 2010-06-09 |
| CN101725794B true CN101725794B (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810201061 Expired - Fee Related CN101725794B (en) | 2008-10-10 | 2008-10-10 | Method and device for resisting erosions of overflowing end face of mechanical sealing flange |
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| Country | Link |
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| CN (1) | CN101725794B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109702891B (en) * | 2019-01-29 | 2020-04-03 | 中联重科股份有限公司 | Rotating hub for shaft end sealing, preparation method of rotating hub and stirrer |
| CN110425038B (en) * | 2019-07-19 | 2023-07-04 | 新昌县欣驰机械有限公司 | Wear-resistant engine flange plate for automobile and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2064430U (en) * | 1989-10-05 | 1990-10-24 | 浙江省平阳化工机械厂 | Centrifugal pump with fluoroplastic alloy bush |
| CN2166262Y (en) * | 1993-05-24 | 1994-05-25 | 王雅亮 | Closed impeller plastic anti-corrosion centrifugal pump |
| US6705830B2 (en) * | 2001-04-27 | 2004-03-16 | Boc Edwards Techonlogies Limited | Vacuum pump |
-
2008
- 2008-10-10 CN CN 200810201061 patent/CN101725794B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2064430U (en) * | 1989-10-05 | 1990-10-24 | 浙江省平阳化工机械厂 | Centrifugal pump with fluoroplastic alloy bush |
| CN2166262Y (en) * | 1993-05-24 | 1994-05-25 | 王雅亮 | Closed impeller plastic anti-corrosion centrifugal pump |
| US6705830B2 (en) * | 2001-04-27 | 2004-03-16 | Boc Edwards Techonlogies Limited | Vacuum pump |
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| Publication number | Publication date |
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| CN101725794A (en) | 2010-06-09 |
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