Manifold and valve member with the combination of research

According to incomplete statistics, in 2011 China's fluid sealing industry above designated size industrial output value of 77.271 billion yuan enterprises, an increase of 21%, of which the hydraulic industry completed 43.62 billion yuan, an increase of 18.47%; pneumatic industry completed 15.046 billion yuan, an increase of 29.60%; sealing industry completed 18.605 billion yuan, an increase of 23.95%. fluid airtight industry 125 key enterprises in 64 hydraulic industry, hydraulic industry 6, pneumatic industry 40, 15 sealing industry, economic efficiency index was 233.56, 226.44 over the same period last year. these key enterprises of the industrial output value of 33.424 billion yuan, an increase of 12.94 percent, of which the output value of 14.171 billion yuan hydraulic enterprises, an increase of 7.72%; hydraulic enterprise value of 533 million yuan, down 4.77%; pneumatic enterprise value of 8.639 billion yuan, an increase of 25.12%; sealing enterprise value of 7.32 billion yuan, an increase of 11.14% of the good prospects for development, hydraulic couplings but also attracted a lot of foreign investment in the industry. According to incomplete statistics, nearly two years fluid sealing industry to invest no less than 30 billion yuan, including construction machinery and other hydraulic hosting industry investment funds accounted for approximately 50% of total investment. Sany, Liugong, Long Engineering , Zoomlion, Shandong Changlin construction machinery and a number of well-known enterprises have invested or hydraulic corporate mergers and reorganizations. China is currently seeking high-end break more than 20 tons of hydraulic excavators used for basic control in the hands of an enterprise that Kawasaki company. Each discussed the matter, sand Bossen are solemnly. Domestic high-end hydraulic manifold block the kinds of situation, has attracted national attention. October 2011, after six months of planning, engineering machinery with high-pressure hydraulic manifold system industrialization and application of the preparatory body established collaborative work platform. Under the guidance of government departments in the industry, driven by the working platform focused on the China Construction Machinery Industry Association and the China Hydraulics Pneumatics & Seals Association, two associations of superior forces to HMB as a breakthrough, hose assembly taking manifold and accessories production Gakken a combined form, increased industry consolidation, the establishment of effective docking platform, and strive in the next 3 to 5 years to break China's construction machinery industry hydraulic and other accessories on foreign dependence.

Characteristics and uses

High pressure hose assembly is normally provided by the liquid-resistant synthetic rubber inner layer, middle layer, Ⅰ to Ⅵ layer wire braid reinforcement, and weather-resistant synthetic rubber with excellent performance cover. Mainly used in hydraulic support mine, oil field exploitation, suitable for construction, lifting transport, metallurgy, forging, mining equipment, ships, injection molding machinery, agricultural machinery, machine tools and various industrial sectors mechanization and automation of hydraulic transmission system has a certain pressure and temperature based (such as mineral oil, soluble oil, china hydraulic hose oil, fuel oil, lubricating oil) liquid, water-based liquids (such as emulsion, oil-water emulsion, water), gas and liquid transmission and other fields.

Structure and working principle

The brake yoke, the excitation coil springs, disc, armature, spline sleeve, mounting screws, etc., the brake device mounted on the flange (or motors) the rear stretch; sleeve and the spline shaft brake disc coupling.
The brake coil when the rated excitation voltage (DC), the electromagnetic force pull armature, the armature from the brake disc (released), then the drive shaft with the brake disc or start normal operation, when the separation or broken drive power, the brake is off at the same time, then the pressure in the armature spring force to the armature and the brake disc friction torque between the flanges, the drive shaft speed to stop. The brake thermal environment is poor, the drive shaft is long continuous work, if conditions allow, you can brake work, keep the voltage is converted to 70% -80% of the rated voltage to reduce fever.
4 Qian Dai electromagnetic brake chain tail electromagnetic brake
The moving parts of the mechanical stop or slow down the mechanical parts. Commonly known as brakes, brake. Qian Dai primarily by electromagnetic brake brake frame, brake components and control devices and other components. Some of the electromagnetic brake is also equipped with an automatic brake clearance adjustment device member.
Some electromagnetic brake has been standardized and serialized by a professional factory for selection. teflon hose Qian Dai electromagnetic brake is an ideal modern industrial automation actuators, mainly from the transmission system in the mechanical power transmission and control of movement and so on. Compact structure, simple operation, sensitive response, long life, reliable, easy to implement remote control and so on.
It is mainly with the series motor support. Widely used in metallurgy, construction, chemical, food, machine tools, stage, elevators, ships, packaging machinery, and when power (risk prevention) braking and other occasions.
So that the mechanical moving parts to stop or slow down the drag torque must be applied is called the braking torque. Braking torque is the design, selection based on the brake, and its size is determined by the type of machinery and work requirements of the decision. Brake friction material used on the (brake parts) directly affects the performance of the braking process, which will affect the performance of the main factors for the operating temperature and temperature rise speed. Friction material should have a high and stable coefficient of friction and good wear resistance. banjo fitting Metallic and non-metallic friction material sub categories. The former are commonly used cast iron, steel, bronze and powder metallurgy friction material, which has leather, rubber, wood and asbestos.

Block brake with external and internal style sheets hold two kinds

Block brake with external and internal style sheets hold two kinds :
① The holding brake blocks : it is the length of stroke by manipulation device is divided into short stroke and long stroke block brake block brake . Short stroke block brake magnet mounted directly on the brake arm. When working around moving core pin rotation to achieve loose brake ; magnet is de-energized by the main spring tight gates . This brake compact, tight brakes and brake release moves fast , but the impact force . Long stroke brake block brake lever system can generate a large pine brake force , but the braking action is slow, suitable for large brake.
② inner sheets block brake : brake wheel brake block is located inside through the pedal , the brake lever and bumps block open , pressed tight inner surface of the brake wheel brakes, the brake pedal is released the spring back blocks and loose brake. This can also be hydraulic or pneumatic brakes and other manipulation. Zhang style brake blocks within a compact, dustproof , and can be used where installation space is restricted , widely used in various vehicles.
Block brake pad The standard applies to foreign holding dual brake blocks . Press the brake pad ( referred brake shoe ) and brake pad connection mode , and the brake shoe ends of the hinge shaft hole without sink hole into the following four categories:
Type B1 : hydraulic hose adapters rivet hole on the brake shoe , brake pad adhesive way connected , brake shoe ends of the hinge shaft bore no sink hole ;
B1C Type : brake shoe is no rivet hole type , way connected with the bonding pad system , brake shoe ends of the hinge shaft hole with sink holes ;
Type B2 : rivet holes on the brake shoe , brake pads connected with caulking , brake shoe ends of the hinge shaft is no counterbore end portion ;
B2C type : rivet holes on the brake shoe , brake pad coupled with riveting , brake shoe ends of the hinge shaft also has sink holes.
2 shaped brake disc brake is applied mine hoist brake system hydraulic actuators, accurate name would be: Normally closed rear disk brake cylinder , is currently used in more rear-mounted fuel tank , start the hoist when the output pressure hydraulic oil open brake , hoist to work, working brake, hydraulic station according to the conditions increase or decrease the pressure , the brake will provide braking force contrary , in the accident state, the hydraulic pressure Back to the residual pressure ,hose assembly the brake at maximum braking force in the shortest time to hoist parking .

Hydraulic power unit (HPU) as oil installations

Hydraulic power unit (HPU) as oil installations , it is through external piping system is connected with a number of hydraulic cylinders to control multiple valve action . Tanks, pumps and accumulators to form an independent power oil closed source system . Petrol stations can be equipped with PLC control system , which controls all internal hydraulic functions and generate signals and the control room (DCS) exchange . Control components such as hydraulic servo valve mounted directly on the hydraulic cylinder , through the valve into the high-pressure hydraulic cylinders, or from which the release of high pressure oil. In the normal state , pump oil to the system to automatically maintain system rated pressure , through the control valve atresia, to achieve the valve in any position to secure his position under the function ; in working condition , hydraulic actuator controlled by the solenoid valve , the system command signal the solenoid valve action, control pressure and the accumulator energy release , and then control slide valve cylinder , valve driven by mechanical transmission mechanism , the implementation of rapid closure of the normal opening and closing , and test control . hose fittings Pressure cylinder can be fixed on the stem can also be used directly as the executing agency . Returns excess hydraulic oil hydraulic oil stations, such piping systems with an inlet pipe a return pipe can control several parallel connection of the valve. This has a special hydraulic drive technology is used to control the main steam turbine bypass valve and actuator system action .
Changsha QIANRUN power unit technology-related technology products
Power unit is designed for all applications optimized design, for example, can be used in harsh environments trucks running or heavy hauler condition for a long time , and other products that require high performance and high quality of the occasion . We will also anticipate greater application flexibility and more cost requirements. Thereby to produce an extremely diverse universal platform , using standard components, able to respond to market demand for most application conditions , the hydraulic components of the customer inventory levels to a minimum , china hydraulic hose but also greatly reduce the workload of the non-standard design . Power unit also makes special reference to cost advantage . For example HE power unit , built on a multi- universal platform, allowing the use of motor sizes from 80 to 132mm (0.3 ~ 4.5kw), the pump displacement from 0.24 to 5.7cc. A power unit can control up to four cylinders . The core component is the adapter . There are two different specifications. With a variety of shapes and installation.

Power adapter market trend analysis

Power adapter market is an important trend is the customer needs to have a higher output power, smaller size of the adapter , which involves the use of a new topology . Power Adapter mainly reflects some important trends . First, the work efficiency and standby ( no-load ) energy demanding. For example, the U.S. Environmental Protection Agency (EPA) " Energy Star" program in April 2008 released a version 2.0 of the external power supply specifications for external power supply EPA2.0 this version of the spec will be held November 1, 2008 came into effect. Power adapter includes two categories, one is the internal AC / DC (AC / DC) power converter, built- in electronic products internally and may possess multiple output voltages , such as a desktop computer's internal power supply, etc. ; reusable fitting the other is the external one-way output AC / DC or AC / AC (AC / AC) power adapter with single output voltage, typically referred to as an external power supply (EPS), widely used in printers , laptops , LCD monitors and gaming applications. In addition to the "Energy Star " kind of industry energy efficiency specifications, some large OEM customers may also have their own unique work of energy efficiency and energy requirements . For example, for computer power EPA4.0 norms for the use of an external power supply laptop and tablet PC requirements are primarily reflected in the standby power consumption (≤ 1.0W), dormant energy consumption (≤ 1.7W) , etc. ; comparison, Dell power requirements for this type of mainly reflected in the different load conditions specific energy efficiency , ie 0.7W ( input power Pin <1W), 1.5W (Pin <2W), 10.7W (Pin <12.6W) and 17W (Pin <20W) load conditions, can be respectively more than 70% efficiency , 75% , 85% and 85%. It is worth mentioning is that the future will continue to regulate the energy efficiency requirements continuously improve and evolve . With laptop AC-DC power adapter , for example, the industry in no-load mode, a high level of energy consumption is about more than 300mW , 150mW and future load mode energy consumption could become targets. Moreover, the requirement for multi-output adapter may also be included among the criteria . ON Semiconductor 's NCP1605 power factor correction (PFC) controller and NCP1396 resonant mode controller can be used to design 200W or 300W Desktop Adapter adapter. hydraulic hose adapters From the notebook adapter , its power requirements from 50W to 70W range has been increased to more than 100W rating. In addition, such as Apple and Lenovo ThinkPadX300 MacBookAir other new ultra- portable notebook power adapter is also smaller and lighter.

Corrugated metal hose technology history

  Since 1855, German inventor and manufacturer of the world's first one corrugated metal hose since, after one hundred years of development, its reliable sealing metal hose , pressure resistance , high temperature resistance , corrosion resistance and flexible , and many other properties, widely used in aviation, aerospace, nuclear energy , shipbuilding and new construction and other industrial sectors , a modern piping systems essential components. With the rapid development of modern industry , metal hose is used widely for metal hose requirements are also increasing, bound to the metal hose technology more and more research , the development of metal hoses generally have the following stages :
      Initially , people used animal skins sewn into a tubular structure to meet the needs of the struggle for production . After a fairly long period , to 70 end of the century , the Dutch Golden Gai Wan del brothers made ​​a longitudinal suture canvas hose , at the time of the fire service is widely used . Later, with the rubber in the international market and the emergence of vulcanization process of development, hoses and metal wire or twine and other fabrics Kai mounted hose come out. But the works of some steam , hot air type high temperature medium ; liquid hydrogen ,socketless fitting liquid oxygen, liquid helium cryogenic medium class ; gasoline, kerosene, acid , alkali and other corrosive media ...... If the hose to transport , of course not. Especially at high temperatures, it is more difficult to ensure the security and reliability .
      Therefore, it gradually to focus on the metal tube , the metal tube geometry to produce the corresponding corrugated external surface . In this way, both with the same flexibility with hose : but also has a high temperature, low temperature resistance , aging resistance, corrosion resistance. Thus, as the metal hose body metal bellows thus produced .
     1855 , first published in Germany in manufacturing bellows patents. It is used when making jewelry has some principles to manufacture bellows . 30 years later, the French and German cooperation in the development of new metal bellows , in August 1885 won the French and German patents.
     l894 , the kind of bellows structure has been improved : People metal band by using two different diameter, wound in the opposite direction . Thus, the stress state of the metal strip in the lower reaches equilibrium with each other to overcome the shortcomings of the spontaneous unfolding .
    In 1929, the structure of the bellows had another technological revolution , which completely solved the bellows filled pad due to bending when asbestos rope rubber band or changes in the grooves of uneven sealing performance loss problems , thus opening up a corrugated tube broad prospects for development .
    From the 1950s began , double, triple , multi-layered bellows. Especially very thin-walled stainless steel bellows developed rapidly . In order to meet the requirements , banjo fitting it is welded , electroforming , machining, hydraulic and mechanical spinning process method to manufacture a variety of bellows .
    Corrugated metal hose from the tube as the significance of the body in terms of the development of metal bellows , metal hose means development .