Q:Mechanical bearings, all types? Roughly

The separable bearing is composed of a raceway and a needle roller and cage assembly that can be arbitrarily assembled with a punched thin raceway (W) or a machined thick raceway (WS). A non separable bearing is an integral bearing consisting of a precision machined raceway and a needle and cage assembly. This type of bearing can bear one-way axial load. With small space, it is beneficial to the compact design of machinery. Most of them only use needle roller and cage assembly, and the installation surface of shaft and shell is used as raceway surface.

Q:China mechanical net

From Chinese GM parts, general machinery, hardware, tools, instruments, electrical appliances and related equipment, textile equipment, chemical equipment, agriculture, food equipment, construction equipment, environmental protection equipment, mining equipment, metallurgical equipment, financial equipment, commercial vehicles and accessories, machinery processing equipment, machinery processing industry machinery enterprises and mechanical products

Q:What are the world famous mechanical equipment exhibition?

2 、 Las Vegas Construction Machinery Exhibition (Conexpo-Con/Agg) sponsored by the American equipment manufacturers association, the American precast concrete association, the United States sand association. It is the world's second largest construction machinery exhibition after BAUMA. The exhibition, sponsored by the American Association of equipment manufacturers, has been held every three years for nearly a hundred years. The next exhibition will be held on March 2017 7-11. The exhibition is of great size and numerous merchants. It has focused on world famous brands such as Caterpillar, Komatsu, Liebherr and Volvo. It is an important platform for displaying the latest technology, equipment and products in the industry.

Q:What are the principles, performances and uses of the commonly used construction machinery equipment?

1.: concrete pump principle: concrete pump driven by motor pump system, the conveying capacity of constant power control of hydraulic system of concrete pump automatic control, manual control can also be used to select the concrete delivery volume. Performance: 1. using the hydraulic system of double pump double open circuit, the main pump valve swing circuit and S circuit are separate for fault diagnosis and removal; 2. pumping hydraulic circuit adopts the main valve pilot pressure control; 3. hydraulic system has safe relief protection, while the main pumping system overpressure, oil pump automatic pressure cutting off; 4. switching circuit with constant voltage supply with the energy storage device, so as to guarantee reliable swayingforce large and have the advantages of energy saving effect; 5. pumps and valves are used continuously, the world famous brand is more reasonable and more reliable and easily realized commodity concrete transport quantity adjustment; 6. hydraulic pipeline with cone seal pipe joint sealing material; 7. pumping circuit adopts a valve block mode of high and low voltage switch, convenient, no leakage; 8. with oil and oil filter technology, foreign body into the hydraulic system. Further improve the hydraulic system reliability and component life; 9. hydraulic hose hose. Use: widely used in commercial concrete demand for large, high grade and strict quality requirements, long conveying distance of high-rise buildings, municipal construction, electric power, energy, transportation and other civil and industrial buildings, especially the construction of the narrow space more show its true colour of a hero.

Q:Building materials, equipment, components and fittings products must have "three certificates" is what cards?

Product qualification certificate means the qualified certificate, qualified label or qualified seal issued by the manufacturer to indicate the quality of the products manufactured by the factory and qualified on the package of the product or product. This is the producer's guarantee of the quality of its products, and also the obligation of a product to be stipulated by the law.

Q:What are the sub projects of a construction project?

Lime soil, sand and gravel foundation, geosynthetics foundation, fly ash foundation, dynamic compaction, foundation grouting, preloading foundation, vibroflotation foundation, jet grouting foundation, cement mixing pile foundation, soil and lime soil compaction pile foundation, cement fly ash gravel pile, cement soil pile foundation. Based on sand pile foundation

Q:What type of industry does the machinery and building accessories processing belong to?

There are only three tax categories in our country: 1 consumption tax, 2 VAT, 3 special tax (agriculture). Therefore, as long as the manufacturing or processing of industrial value added tax on enterprises. It has nothing to do with the economic nature, classification and categories of an enterprise.

Q:The building electrical iron pipe and the pipe line fixing member connected to what is called, what is called the iron pipe and the 86 fixed part of tin

Pipe or direct protection, construction of special operation personnel of construction electrician training materials, focus on the "construction of special operations personnel management regulations", "construction of special operations personnel safety technology assessment program (Trial)", "construction of special operations personnel safety operation skills examination standard (Trial)" and other relevant provisions safety, technical knowledge and skills to master for construction electricians were explained, the book has 10 chapters, including: basic knowledge, common low-voltage electrical appliances and Motor City, power supply and grounding earthing protection system.

Q:How are the machine parts stacked?

Then there is a point to note, that is, from there to get used, must be put back where, so that will be organized, all things are owned by you, it will not mess.

Q:What are the safety protection equipment, machinery and equipment, construction machinery and accessories for construction enterprises?

As well as scaffolding, protective fence, all belong to the safety protection facilities, does not belong to the safety protection appliances. Safety protection tools are many, it is characteristic of the operator to carry, I will not list