CN101956698A - Mechanical assembly, in particular pump assembly - Google Patents
Mechanical assembly, in particular pump assembly Download PDFInfo
- Publication number
- CN101956698A CN101956698A CN2009101733390A CN200910173339A CN101956698A CN 101956698 A CN101956698 A CN 101956698A CN 2009101733390 A CN2009101733390 A CN 2009101733390A CN 200910173339 A CN200910173339 A CN 200910173339A CN 101956698 A CN101956698 A CN 101956698A
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- China
- Prior art keywords
- mechanical assembly
- porous slab
- spacer
- assembly
- metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/051—Stirrers characterised by their elements, materials or mechanical properties
- B01F27/052—Stirrers with replaceable wearing elements; Wearing elements therefor
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a mechanical assembly, in particular a pump assembly in a composite structure. The mechanical assembly comprises a metal part (6) and a mixed casting (7), wherein the mixed casting (7) is fixed on the metal part (6) through at least one anchoring member, and a supporting inlay in the mixed casting (7) is formed by the anchoring member. Furthermore, the invention also relates to a method for restoring a damaged metal mechanical assembly. The method is used for providing a restored mechanical assembly in the composite structure. The mechanical assembly, in particular the metal part in a mixed structure with higher strength is manufactured. The perforated plates (8) are kept on the surface of the metal part (6) with small intervals through spacers (9) and fixed on the metal part (6) through the spacers (9).
Description
The present invention relates to the mechanical assembly in the composite structure, be particularly related to the pump assembly of forming by metal parts and mixing foundry goods (hybrid casting), and by at least one anchor member described mixing foundry goods is fixed on the described metal parts, described anchor member forms the support inlay (back-cutting) in the described mixing foundry goods.
In addition, the invention still further relates to recovery impaired metal mechanical assembly, the particularly method of pump assembly.
Mechanical assembly in the composite structure (for example case member or wearing plate) mainly is used in the centrifugal pump of handling corrosion thing and/or abrasive media.
Because their chemistry and mechanical stress are high especially, these assemblies are subjected to serious wearing and tearing and destruction.Before the several years, make these assemblies with high-alloy stainless steel always.Owing to can not reach gratifying service cycle in working life with these materials, begin not long ago to be devoted to partly to substitute steel with mixing foundry goods.
Mix the mixture that foundry goods is interpreted as the tackiness agent that has aggregate (aggregate) in this application.Described aggregate is the wear-resisting and anticorrosive of fine grained, for example silicon carbide, corundum, silica sand, glass or these mixtures of material.Plastic materials can be used as tackiness agent, for example epoxy resin, vinyl ester resin or polymethylmethacrylate (PMM).
When making composite component, often with the casting mould of metal parts as the mixing foundry goods.In order to ensure the strong combination between described metal parts and the described mixing foundry goods, described metal parts is provided with anchor member, and this anchor member forms the support inlay in the described mixing foundry goods.
German utility model patent No.29723409 proposes common bolt is tightened on the metallic matrix as anchor member.Therefore, the support inlay in the described mixing foundry goods is formed by bolt head.
This technological scheme has such shortcoming: a large amount of mixing foundry goods must be cast, so that the described bolt head of complete closed.Therefore described mixing foundry goods accounts for the major component of described composite component integral thickness.Because the integral thickness of described composite component is subjected to the restriction of its space, therefore described metal parts can only have materials with smaller thickness.But,,, thereby improve the needed breaking strength of pump assembly so its thickness must be maximum as far as possible because metal parts is represented the load-bearing basis of described composite component.Strength problem often takes place in the medium-and-large-sized mixing foundry goods part of composite articles.
Another shortcoming of this technological scheme is only to keep mixing foundry goods at some point or some place by bolt.If described mixing foundry goods need bear heavy load, in the point of contact zone between described bolt and mixing foundry goods peak stress will appear.This can cause the local weakness of described mixing foundry goods, and therefore it more can be subjected to bigger erosion owing to cavitation.Separated ceramic component is taken away by fed sheet of a media, and they can destroy the apparatus assembly in downstream.
It seems that by these problems the technical problem to be solved in the present invention is to develop the sort of mechanical assembly mentioned above in such a way, thereby can avoid shortcoming recited above.
This task has solved by the anchor member of being made by porous slab, and described porous slab utilizes spacer and metal part surface to keep little interval, and is fixed on the described metal parts by described spacer.
By this way, the surface of contact between described mixing foundry goods and the described anchor member has compared with prior art increased greatly.Therefore avoided having the peak stress of harm.In addition, by this way, the amount of cast mineral casting also can reduce to minimum.
Because with the anchor member on the plane surperficial close arrangement along described metal parts, the special picture of described foundry goods has coating.And described porous slab has effect stable and that strengthen in whole casting body, so compared with prior art, the mixing of this mechanical assembly of the present invention connection has obvious improvement.Under the situation of the thickness that need not surpass given composite component, the part of the carried metal parts in this mixing connects also can access substantial enhancing.
Therefore, the application area that also advantageously will mix foundry engieering of the present invention now extend to maturation, in the existing aggregate.In the exhuast gas desulfurization equipment in power station, also have a large amount of pumps of design in the past, these pumps are by being used to carry the Homogeneous Steel case member of erodibility lime milk or gypsum suspended matter to form.Because these media seriously corrode steel, therefore the case member of having to often change needs to store a large amount of spare parts.
The invention enables now and can restore the metal casing member that is etched at lower cost.For this reason, impaired pump assembly is worn away, and is equipped with porous slab and prepares the mixing foundry goods of protectiveness subsequently.The working life that the case member that initial test shows is repaired by this way can reach is also long more a lot of than their working life when the brand-new state.The maintenance period of pump obtains prolonging, and can not carry out the spare part storage.For example, the wearing plate of repairing by this way than all steel spare part cost efficiency up to 70%.
The use of the anchor member of being made by porous slab never is limited to plane mechanical assembly (such as wearing plate).It can also cover metal part surface by using the little porous slab (for example piece plate) of polylith, makes to have the more composite component of complex geometry.
The fixing of porous slab and spacer preferably realized by spot welding.This connecting means can be carried out and the cost efficiency height on the one hand fast, and short-term point-like thermal stress can not change the material property of metal on the other hand simultaneously.
According to another improvement project of the present invention, the thickness range of porous slab can be between 1 to 2mm.This thickness of slab has enough reached aforementioned effect.In addition, such thin plate is easy to processing.
Suitable distance should roughly be the half as much again of corresponding described porous slab thickness or two times between the metal part surface of described porous slab and pump assembly.In fact verified, the distance in this interval is fully enough filled up the load-bearing foundry goods below the described porous slab.
Because it is quite tough to mix foundry goods, thus cross-country traveling ability (high passage) must be had with respect to the described porous slab in described surface, so that can pass through smoothly therefrom.Has this character with the corresponding porous slab of DIN24 042 Form Qg.In addition, compare with the porous slab of close hole structure, the porous slab of such gross porosity causes the less impact point that breaks in the mineral cast layer.
In plant engineering, not only pump is subjected to the load and the stress of high chemistry and machinery.Other also are subjected to similarly wearing and tearing as pump with the contacted mechanical assembly of corrosive medium (for example elbow or stirring gear) and destroy.For this reason, other mechanical assemblys except that the pump assembly also can advantageously use said method to restore, perhaps from just being designed to or being configured to composite component of the present invention at first.
Now exemplary embodiment of the subject disclosure is described in conjunction with following accompanying drawing, wherein:
Fig. 1 shows traditional pump assembly;
Fig. 2 illustrates pump assembly of the present invention;
Fig. 3 shows the detailed view that details " X " is located.
Fig. 1 shows wearing plate and typical pump assembly, and it is designed and is configured in the composite structure.Traditional wearing plate is whole to be represented with reference numerals 1.Its metal parts 2 by the bowl type is formed, and is cast with to mix foundry goods 3 in metal parts 2.Bolt 4 enters metal parts 2, and the capitiform of bolt 4 becomes to mix the support inlay in the foundry goods 3.
Fig. 2 shows according to wearing plate of the present invention.Its integral body is represented with reference numerals 5.It also is made up of metal parts 6, is cast with mixing foundry goods 7 with the protective layer form on metal parts 6.The surface that will be parallel to metal parts 6 as the porous slab 8 of anchor member is arranged with very little interval.Spacer 9 is guaranteed the constant distance between described metal parts 6 and the described mixing foundry goods 7.Utilize spot welding 10 that described porous slab 8 and spacer 9 are fixed on the described metal parts 6.These details are shown in Figure 3.
Claims (9)
1. the mechanical assembly in the composite structure, pump assembly in particular, it is made up of metal parts (6) and mixing foundry goods (7), described mixing foundry goods (7) is fixed on the described metal parts (6) by at least one anchor member, described anchor member forms the support inlay in the described mixing foundry goods (7), it is characterized in that, described anchor member comprises porous slab (8), keep the surface of porous slab (8) and described metal parts (6) the little distance of being separated by by spacer (9), and porous slab (8) is fixed on the described metal parts (6) by described spacer (9).
2. the described mechanical assembly of claim 1 is characterized in that, by spot welding (10) described porous slab (8) and described spacer (9) is fixed on the described metal parts (6).
3. claim 1 or 2 described mechanical assemblys, the thickness that it is characterized in that described porous slab (8) is between 1 to 2mm.
4. the described mechanical assembly of aforementioned each claim is characterized in that, the small distance that the surface of described porous slab (8) and described metal parts (6) is separated by roughly is the half as much again to two times of described porous slab thickness.
5. each described mechanical assembly of aforementioned claim is characterized in that, uses the porous slab corresponding to DIN24 042 Form Qg.
6. the described mechanical assembly of aforementioned each claim is characterized in that, uses packing ring as described spacer (9).
7. restore impaired metal mechanical assembly, the particularly method of pump assembly, it is characterized in that described method comprises the steps:
A) the impaired zone of the described metal mechanical assembly of excision;
B) spacer is fixed on the described metal mechanical assembly;
C) porous slab is fixed on the described spacer, makes porous slab in cut zone, extend to surface with the described metal mechanical assembly little distance of being separated by;
D) in the zone of described porous slab, will mix cast casting in the metal mechanical assembly, thereby in composite structure, produce the mechanical assembly that is restored.
8. the method for the impaired metal mechanical assembly of the described recovery of claim 7 is characterized in that, grinds off the impaired zone of described mechanical assembly.
9. the method for claim 7 or the impaired metal mechanical assembly of 8 described recoveries is characterized in that, by spot welding described spacer is fixed to described mechanical assembly and/or described porous slab is fixed to described spacer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101733390A CN101956698A (en) | 2009-07-13 | 2009-07-13 | Mechanical assembly, in particular pump assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101733390A CN101956698A (en) | 2009-07-13 | 2009-07-13 | Mechanical assembly, in particular pump assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101956698A true CN101956698A (en) | 2011-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101733390A Pending CN101956698A (en) | 2009-07-13 | 2009-07-13 | Mechanical assembly, in particular pump assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101956698A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10327494A1 (en) * | 2003-03-06 | 2004-09-16 | SICcast Mineralguß GmbH & Co. KG | Rotary pump housing or pump housing closure has wear disc made of composite materials with metal part and a cast hybrid component |
-
2009
- 2009-07-13 CN CN2009101733390A patent/CN101956698A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10327494A1 (en) * | 2003-03-06 | 2004-09-16 | SICcast Mineralguß GmbH & Co. KG | Rotary pump housing or pump housing closure has wear disc made of composite materials with metal part and a cast hybrid component |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110126 |