SSIC Silicon carbide Pump shaft

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Special ceramics: Special ceramics

Product Description:

SSIC  Silicon carbide Pump shaft

SSIC  Silicon carbide Pump shaft

SSIC  Silicon carbide Pump shaft

SSIC  Silicon carbide Pump shaft

Tailor-made for customers all kinds of pumps with my company, kettle, bearing no pressure sintering silicon carbide mechanical seal, and all kinds of resistance corrosion pump parts and the accessories. Our company pressureless sintered silicon carbide products a reaction bonded silicon carbide products, can easily adapt to the harsh working conditions, in strong corrosive, strong wear, high temperature, high pressure, high strength harsh harsh under complex conditions is more outstanding. At the same time, our company to provide customers with nozzles, armored body armor plate and other special-shaped pieces of custom-made service.

Compared with the reaction sintered silicon carbide product (SSIC), the production process of the sintered silicon carbide product (RBSIC) is complex and the production investment is high. In addition, whether it is in the resistance to corrosion and abrasion, compressive and flexural fracture resistance of or high pressure, high temperature and other properties are more excellent, this is pressureless sintering silicon carbide products will in the near future completely replace reaction bonded silicon carbide products is one of the important reasons. The main varieties of the pressureless sintering silicon carbide products with all kinds of mechanical seal with sealing ring and moving ring and static ring, corrosion resistant pump, magnetic pump, shield pump components. At the same time, the production special-shaped pieces of nozzle, wire drawing die, armor plate. According to the drawings, we will provide customers with satisfactory products and customer satisfaction. Let customer satisfaction is one of the purposes of our company has been pursued, but also one of the objectives pursued by all the staff of our company.

Features: high temperature resistance, wear resistance, corrosion resistance, oxidation resistance, hardness, heat conduction

Main products: mechanical seals, pump parts, nozzles, bullet proof plate

Mechanical seals: high hardness, high wear resistance, good self - Lubrication and high heat conductivity, so the service life of mechanical seal is greatly improved.

Pump: resistance to corrosion and wear characteristic of the pressureless sintering silicon carbide become magnetic pump sliding bearing, resistant corrosion pump sleeve, shielding pump assembly, etc. various kinds of pump of choice

Nozzle: wear resistant, high temperature resistance, high hardness characteristics of the normal pressure sintering silicon carbide nozzle to become a perfect alternative to carbide nozzle

Armor: light weight, high hardness, good ballistic performance, pressureless sintering of SiC for your life and property security escort



 

medium

content

Causticity

Atmospheric SIC

The reaction SIC

WC

WC

AL2O3

ZrO2

Si3N4

stainless steel

steel

HNO3 nitric acid

50%

A

A

C

A

A

C

C

C

Hydrochloric acid HCI

35%

A

A

C

A

A

C

C

A

Sulfuric acid H2SO4

98%

A

A

C

A

A

C

C

A

Hydrofluoric acid HFF

40%

A

C

C

C

C

C

C

C

Phosphoric acid H5PO4 215OC

85%

C

C

C

C

C

C

C

C

HNO3+HF

20%+5%

A

C

C

C

C

C

C

C

Sodium chlorate NaCIO

10%

A

B

C

A

A

A

C

A

Sodium hydroxide NaOHH

50%

A

C

A

B

A

B

A

A

Potassium hydroxide KOH


A

C

A

B

A

B

A

A

Acetic acid CH3COOHH

80%

A

A

C

A

A

C

C

C

Sodium sulfate + Na2CO3 + H2SO4 925OC

 


A

A

C

A

A

C

C

B

Silica solution SIO2

 


B

C

C

C

C

C



Assessment Method: the specimen prior polishing, immersed in the test liquid (70OC) for 100 hours, the weight was measured and observed microstructure, weight reduction is calculated by the degree of corrosion was observed microstructure for corrosion to comprehensive judgments.

A level (corrosion): corrosion rate ≤0.125mm / ingredients in a small amount of corrosion observed slice

Level B (somewhat resistant): corrosion rate = 0.125-1.0mm / or annual corrosion rate ≤0.125mm / observe a large number of corrosion

Class C (resistant to corrosion): corrosion rate ≥1.0mm / or the main ingredient of Corrosion

 Silicon carbide performance indicators

Index Name

 

Atmospheric SiC

Reaction Bonded Silicon Carbide

Purity (%) of silicon carbide

> 97

>90

Density (g / cm)

3.06-3.15

>3.05

Particle size (um)

0.5-0.7

8-20

Hardness (HRA)

≥90

≥90

Flexural Strength (MPa)

400-580

350-450

Compressive strength (MPa)

3900

>2500

Fracture Strength (MPa)

3.05-4.6

4.3

Elastic Modulus (GPa)

380-410

420

Thermal conductivity

102.6

35-110

Coefficient of thermal expansion (1 / ℃)

4.02×10

4.3×10

Poisson's ratio

0.14

0.15

 

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Q:Cooling method and structure of sliding bearing
The so-called water cooling, that is, on the bearing body slot, can pass cooling water, the effect is better.
Q:What is a sliding bearing alloy?
3, enough plasticity and toughness, higher fatigue strength; 4, good heat resistance grade corrosion resistance; 5, good running in.
Q:The oil release ring is in the mounting position of the sliding bearing
It has the advantages of no refueling, simple maintenance and long service life. It has been widely used in related fields in recent years.
Q:Bearing is the bearing?
No, bearing is with a bearing shell and a mounting hole, sliding bearing, it has become a linear bearing
Q:What are the common sliding bearing bushing materials? What are the characteristics of each?
3) oily bearing: generally use bronze, cast iron powder, the amount of graphite pressing forming, sintered by high temperature porous material. It is often used in low or medium speed, light load and inconvenient lubrication.4) Niron. Commonly used nylon 6, nylon 66 and nylon 1010, nylon bearings with running and good, the debris after the soft surface does not hurt the shaft neck, corrosion resistance and other advantages, poor thermal conductivity, water will swell.
Q:What are the major damage forms of plain bearings?
Two: sliding bearings (sliding, bearing), work under sliding friction bearings. Plain bearings work smoothly, reliably and without noise. Under the condition of liquid lubrication, the sliding surface is separated by the lubricant without direct contact, and the friction loss and surface wear can be greatly reduced. The oil film also has a certain vibration absorption capacity. But the starting friction resistance is larger. The shaft supported by the bearing is called the journal, and the part that matches the journal is called the bush. In order to improve the friction properties of the bearing surface, the antifriction material layer, which is cast on its inner surface, is called the bearing lining. Bearing and bearing lining materials are collectively referred to as journal bearing materials. The application of sliding bearings is generally under low speed and heavy load conditions.
Q:Which life is longer, rolling bearings or plain bearings?
Compared with plain bearings, rolling bearings have small coefficient of friction, high accuracy, low wear and long service life
Q:What are the tolerances and finishes for plain bearings and shaft mating surfaces?
1, the types of tolerance fit into three categories: gap fit (formerly called: dynamic coordination), transition coordination, interference fit (formerly known as: static coordination).2, clearance fit - the shaft and hole there is a clear gap between the coordination, the shaft can be turned in the hole3, the interference fit - there is no gap between the shaft and hole, the shaft and hole close together, the shaft will not be able to rotate alone4, transition coordination between gap fit and interference fit, there may be a gap, there may be interference, such coordination can be used as a precise positioning of the coordination5, when the need to rotate in the hole, choose clearance fit, require relatively large gap H11/c11 (such as: hand mechanism), requirements can rotate, and the gap is not too large demands on the choice of H9/d9 (such as: the idle band with the wheel and shaft), even if the gap with precision select the H8/f7 (such as sliding bearing with)6, if you want the shaft and hole fixed together to rotate, rotate together, to bear the load together with the load, can choose the fit, with little surplus amount can pass relatively small force, relatively large force will make the axis of rotation and hole assembly can be used wooden percussion hammer assembly. With type H7/n6, with large interference can express great force and general press assembly, or by the temperature difference method for assembly, for example: with the train wheel rim and hub, is to use the temperature difference method for assembly interference fit with type H7/z67, the need for precise positioning, but also need to be able to disassemble, such as rolling bearings, inner ring and shaft coordination, outer ring and hole fit, you can choose H7/js6, or H7/k6Hope that the above can help you
Q:Sliding bearings can be used for structural requirements on opposite occasions
3. radial sliding bearing (1) integral and split division is usually made up of bearing cap, bearing seat, bearing bush and connecting bolt. (2) the Bush is the key part in the bearing. Bearing materials should have small coefficient of friction, good thermal conductivity, small coefficient of thermal expansion, wear resistance, corrosion resistance, strong adhesive resistance, sufficient mechanical strength and plasticity. (3) requirements for bearing materials: bearing alloy (Babbitt), bronze, bearing materials of special properties, etc.. 4. thrust bearing (understand) (1) thrust bearing fixed and tilting. (2) the thrust surface of thrust bearing can use the end surface of the shaft, or can make a convex shoulder or thrust the disc in the middle of the shaft.
Q:Sliding bearings, according to their friction state, why bearings and what bearings?
2. boundary frictionThe boundary of oil film thickness is less than 1 microns to two metal surface is completely separated from each other, when the movement of two metal surfaces, metal surface asperities will still considerable rubbing cut, this friction is called boundary friction. The friction law of boundary friction, basically the same with the dry friction, but the friction coefficient decreases, f = 0.1 ~ 0.3. boundary friction though not completely avoid the metal surface wear, but can greatly reduce wear.

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