One, since the fan coil unit to the flexible adjustment. Fan coil for the 3-gear, and waterway system may be set according to the user at room temperature the situation and take automatic control of hot and cold water temperature control valve adjustment, so that each room can be adjusted independently at room temperature, to meet different use of air conditioning customers\\ needs, the room when people use a manual shutdown or automatic timed shutdown, and allows developers to avoid the time investment is too large, easy rolling development.
Second, the entire system partition is more easy to control, you can press toward the room, floor, purpose, use the time to be divided into several regions, sub-control according to different customer needs, thus avoiding the high winds Road system must focus on control of the irrational side of .
, Fan coil body is small, flexible layout, easy to install, occupy.
The fan coil is the central air conditioning system terminal device, its main advantages are as follows
Vertical circular cylindrical worm reducer machine characteristics of the transmission mode
Vertical arc cylindrical worm reducer is mainly used in chemical, construction, and light industries such as mixing equipment, which the use of the plane double enveloping worm gear speed reducer, (1) reducer transmission ratio can be flexibly adjusted; grade belt drive, changing the pulley diameter can be adjusted to the total transmission ratio. ⑵ screw lift belt narrow V-belt, high carrying capacity, with the root up to four, reducing the size of the structure. ⑶ worm wheel bearing span increases, to improve the output shaft of the stress condition and can eliminate the intermediate support on the link in the bracket, so that the machine height significantly reduced.
The square of the arc gear transmission features:
1) arc worm reducer tooth profile is concave-convex engagement, have a larger radius of curvature, and therefore has a high contact strength. Especially the sub-order dual-arc worm gear, the thickness of the tooth root bending strength of the tooth than a single arc gear improve.
2) the arc gear tooth parameters are designed with the flexibility to adjust, such as the radius of tooth profile, tooth height, tooth waist and teeth to be the thickness according to strength requirements and application requirements, and thus designed to meet the requirements of different application forms of gear transmission .
3) arc worm gear reducer drive gear transmission of a point, in the full load of work and you must to go through running-make point contact on the run together and bearing deformation, the local surface contact. Only after the worm gear can be fully running-arc has a higher carrying capacity and longer service life. During operation, the tooth profile of the relative sliding velocity is approximately equal to the tooth surface wear uniform, normal wear and tear of the tooth surface without prejudice to the tooth profile accuracy, and arc gear running-in process can play a pro in this research The role of the finishing.
4) arc tooth worm gear meshing, the contact area high rolling speed along the tooth width direction of the mobile, the mobile speed than the peripheral speed of the gear a lot of easy formation of elastohydrodynamic lubricant film, so that the friction between the tooth surface loss lower tooth wear reduces the transmission efficiency.
5) the end of the arc worm gear drive tooth profile is conjugate tooth profile, and the deep error of center distance changes in error and gnashing of teeth can affect the position of contact points of the tooth surface. When the error is too large, will destroy the normal mating, affect the carrying capacity of the gear pair. Therefore, processing and installation, to strictly ensure the installation precision grinding of teeth to try and center distance.
Worm Gear – cylindrical worm reducer – arc cylindrical worm reducer
The shape of the contact line is superior to the ordinary cylindrical worm gears, to form a film, the middle plane conjugate tooth profile is concave and convex tooth meshing, the transmission efficiency and carrying capacity were higher than normal cylindrical worm gears.
Transmission ratio of 5 to 100
Transmission power: to 1500KW.
Oaks GDP series air handling units
Oaks GDP series air handling units to the end of the central air-conditioning, ceiling air handling units. Its function is to cool the air cooling and dehumidification drying, heating, isenthalpic humidification, filtration and purification as well as a new air unit. Apply to the air delivered to a certain distance through the duct, especially for small commercial office buildings and industrial applications of air conditioning works. The Oaks GDP series air handling units to provide nine kinds of models for customers to choose, for each model are a variety of pipe for customers to choose. Cooling capacity from 12KW to 260KW, the air volume of 2000m3 / h to 15000m3 / h. Oaks GDP series air handling units with direct-coupled centrifugal fan unit static pressure range of 92 ~ 187Pa. The unit features: 1, superior quality, reliable performance, selection software in the AUX-2004 Austrian Alex postdoctoral workstation research and development, applicable to the air handling units, cooling, hot water coil, steam coil design selection. Software in accordance with the actual coil processing equipment usage and thermal engineering law to write long-term repeated verification, correction, to ensure strict to ensure that the performance of the unit. Two. Easy to install, suitable for a variety of places unit a total of nine models (2000m3 / h ~ 15000m3 / h) for customers to choose, complete specifications; unit can be ceiling, floor installation, to avoid you worry not find a suitable installation location. Flexible application of guesthouses, hotels, office buildings and other places. 3. Double-efficient anti-corrosion unit using a the German Wa Nage electrostatic powder epoxy spray coating process into high-strength galvanized sheet electrostatic powder coating, high corrosion. 4. The specifications of the air volume is adjustable for a wider unit 2000m3 / h ~ 6000m3 / h can be three-speed control (optional) 5. Easy maintenance, quick and simple unit with a removable maintenance doors, to facilitate maintenance work. 6. Intelligent control, filling the intelligent control technology mechanical and electrical integration (optional) unit microcomputer intelligent control, easy temperature control, the enthalpy difference between the energy-saving control, with a differential pressure alarm and fault automatic protection a variety of functions. Customers to customize their own control system based on the actual control functions. 7. Air purification, health and environmental protection unit have to formaldehyde and other harmful gas purification function (optional).
The car seat belt use to pay attention to the correct maintenance car battery
Forget to turn off the lights and automotive electrical
Parking stall, forgetting off the car lights, many new owners likely to commit minor errors. After a night of consumption, the battery at any time may not have electricity, will not start car. In such cases, under the conditions permit, you can try for the battery charge. If that does not, the battery may need to be replaced. Try not to use CDs, cigarette lighter, and other electrical equipment when the vehicle is not started, driving the process less of a variety of automotive electrical
Forgot to shut the air conditioning turn off before
Maintenance of the master pointed out that most of the owners used to do with air conditioning or air conditioning along with the vehicle is started automatically start, this will cause each time the vehicle ignition switch is open, air-conditioning system will automatically start, the consequences are a direct result of overloading of the vehicle instantaneous power high, and over time will cause the battery loss.
Correct habits, each time before reaching its destination, first turn off the A / C button, let the cold wind and a few minutes to dry within the air conditioning system to reduce the breeding of germs. And then before you turn off, turn off air conditioning. Each time after the car, and then start the air conditioning.
Idle listening to high-power audio
If your car\\ s sound system is modified, fitted with a powerful sound, so be wary. Maintenance of master, in the case of Not Working, idle listen to the sound of high-power also give the battery to bring a high load.
Frequent start the vehicle
Every time you start the engine, not more than 3 seconds. If the first failed to start, do not rush to start over. From the works of the car, then consecutive start motor will certainly cause excessive battery discharge damaged. Maintenance of the master recommended that the strike again when the time interval should be more than 5 seconds.
Predict the battery \"on strike\" precursor
Maintenance of master, generally near the end of life battery, the owner of driving they feel, for example, the car parked a few days to beat the fire, increased fuel consumption, cars burden feeling in the air conditioning in summer driving, the car Shen, increases fuel consumption obvious and so on. The owners of the battery life cycle of about two and a half years, routine maintenance should be detected battery, which can play a preventive role. Young Philippine
seatbelt.com/">seat belt use with stress
Car wearing a seatbelt, which is the driver know that common sense. Nevertheless, the survey found that seat belts and child safety seat grossly under-utilized.
Car collision or encountered an unexpected emergency brake will have a huge force of inertia, the second collision occurs the driver, passengers and the car steering wheel, windshield, seat back and other objects, can easily cause The crew of serious injury. Seat belts can occupants trapped in the seat, to prevent secondary collisions, reduce the degree of injury of the occupants.
Seat belts, although simple, but there are also many occupants can not be used correctly, that lead to accidents. In the use of seat belts should note the following:
Frequently check the status of the seat belt, if there is damage to the timely replacement. All fixed seat belt bolt in the seat next to the floor should be required to tighten the bolts around should be coated with sealant.
Three-waist belts should the Department as low as possible, the Department of the hip, not tied to the waist; shoulder belts can not be placed under his arm, Xiegua chest. The seat belt can only be a prohibited double share. Do not distort the use of seat belts.
Do not let the seat belt pressure on hard or fragile objects, such as, clothes, glasses, pens, or key; do not let the seat belt with a sharp bladed friction, so as not to damage the seat belt; Do not let the seat back is tilted too far , otherwise the seat belt will not be able to properly stretch and winding; seat when no one, you want to back to the seat belt retractor, buckle tongue to the impact on other objects in order to avoid the emergency brake.
Seat belts must be supporting the installation of the seat shall not disassemble. If the seat belt in use had to withstand a strong tensile load, even if no damage should also be replaced, and shall continue to use.
Air handling units – Ceiling Series
Mixing section: In the single-fan system for fresh air and return air mixed with the new air valve and return valve, manual, automatic optional, specify when ordering. , Just set it back to the air valve in the dual-fan system.
The middle segment: with closed doors, maintenance personnel can enter the unit maintenance.
Thick, efficiency filter section: for rough air (in) efficiency filters, equipped with a coarse (in) efficiency filter, a pressure box pressed, good sealing performance, easy to replace.
Table cold retaining segment: for cooling with dry air. The cold source of the cold section of the table have two choices: chilled water or refrigerant direct evaporation, freezing cold water sources are frozen stations to provide low-temperature chilled water to the surface cooler; direct evaporative condensing unit (air-cooled or water-cooled) to the unit to provide a low temperature refrigerant. Surface cooler after the installation of the retaining plate, can be separated from the water droplets in the air
Heating section: for heating air with steam heating, hot water heating and electric heating three kinds of heat source way for users to choose. Heater row deep 2,4 rows of two kinds. Available in Table 1-2 hot water heating and steam heating and heat, electric heating with high efficiency heating elements can be divided into a block or three-block, the total power of electric heating according to user needs.
Humidification section: for air humidification. Using dry steam humidification or high-pressure water spray humidification or electrode humidifier.
Shunt segment: for fresh air and a return air mixing and ventilation.
Current segment: internal with low resistance to air distribution plates to ensure that the unit within the air flow evenly distributed within the cross-section to minimize the impact of air flow heterogeneity on the air filters.
The muffler paragraph: chip resistive muffler or metal microplate muffler can reduce unit noise.
Sent back to the fan section: for conveying air, which consists of a double inlet centrifugal fan, the wind and the level of the wind two.
Heat recovery section: collecting the exhaust of the air conditioning system in the cold (hot) the amount of fresh air in the cooling (heating) system, can achieve substantial savings in energy, reduce operating costs.
Common fault arc worm gear reducer
Arc worm gear reducer hollow shaft type can obtain very low output speed, is a helical gears and worm combination of levels, with high efficiency, small vibration, noise, low power consumption. This paper focuses on the process common problems with the analysis of the reducer, the proposed solution. Keywords: arc tooth worm gear reducer; problem analysis; assembly quality; installation; maintenance CLC: first lubrication 132.46document code: B worm gear reducer is a compact structure, the transmission ratio, under certain conditions, mechanical Transmission and self-locking function. Hollow shaft worm gear reducer not only has the above characteristics, easy to install, reasonable structure, has been more widely used. It is in the worm gear speed reducer input add a helical gear reducer, multi-stage reducer can be very low output speed higher than the single-stage worm reducer efficiency, small vibration, low noise and energy consumption. A common problem and reasons1 reducer heating and oil. To improve efficiency, the worm gear is commonly used non-ferrous metal worm, the worm is a kind of hard. Due to sliding friction drive, the operation will generate more heat, so the difference in thermal expansion between the reducer parts and seals, resulting in the mating surface to form a gap, the lubricating oil temperature and thinning, and prone to leaks. There are four reasons for this situation, one material unreasonable; is meshing friction surface quality is poor; the choice of lubricant additives is wrong; four poor assembly quality and use environment. 2 gear wear. The Worm tin bronze, matching material 45steel hardening hrc4555, or surface to hardening hrc5055after worm grinder grinding roughness ra0.8m. The reducer normal operation wear very slowly, some reducer can use more than 10 years. If the wear is faster, this is the need to consider the choice is correct, whether the overload operation, and the worm gear materials, assembly, quality or use of the environment and other reasons. Bevel gear wear. Generally occurs in a vertically mounted speed reducer, the main types of lubricants and oil. Mounted vertically, likely to cause lack of lubrication arc Tooth Worm Gear stops running, the motor and deceleration of the motor drive gear oil gear loss, due to lack of lubrication and protection. Starter gear reducer, due to the lack of effective lubrication lead to mechanical wear or damage 4worm bearing damage. When a fault occurs, even if the reduction box and good sealing effect, often found in Gear oil is emulsified, bearing rust, corrosion, damage. This is due to the reducer after running for some time, temperature and cooling of the gear oil, condensate and water mixed. Of course, it is closely related to and bearing quality and assembly process. 2, Wu Qiaoxin GGV reducer reducer Machinery Co., Ltd. specializing in the production of arc tooth worm reducer to solve method1to ensure assembly quality. The Wuqiao Xin Ji source of worm speed reducer factory arc worm gear reducer can be purchased or special tools, demolition and installation of the reducer fittings, try to avoid using a hammer and other tools to percussion; change gears, worm gear, try to use the original accessories and replacement in pairs; pay attention to the output shaft assembly tolerance; protect the hollow shaft wear, anti-adhesive or red lead oil to prevent rust or difficult to remove dirt, repair.2selection, lubricants and additives in the region. Worm gear speed reducer is generally used on220 # gear oil, heavy duty, start frequently, the use of the less well reducer, use some lubricant additives, reducer to stop running gear oil is still attached to the gear surface, forming a protective film to prevent the heavy-duty, low speed, high torque and start-metal contact. Additives containing a ring modulator and leak-proof agent, so that the seals soft and flexible, and effective in reducing the leakage of lubricating oil. 3 reducer installation location of choice. The location allows, try not to use a vertical installation. Vertical installation, to add more than the level of lubricant to install, easy cause the reducer heat and oil.4establishment of lubrication and maintenance systems. According to the principles of lubrication work, \"five\", reducer maintenance
Each reducer are responsible for regularly checked and found a significant rise in temperature, 40 ° C or oil temperature higher than 80 ° C, the decline in the quality of oil or oil, copper, and an abnormal noise phenomenon, worm gear reducer should be immediately stop the use, timely maintenance, troubleshooting, and replacement of oil. Circular Cylinder worm reducer
excavator hydraulic fluid selection and maintenance of hydraulic systems
A reasonable selection of hydraulic oil
a, determine the hydraulic oil viscosity hydraulic oil viscosity, consider the premise of the working temperature and efficiency of the hydraulic circuit, hydraulic oil viscosity (for pump and motor components) in the optimal range (16-36×10-6mm2 / s ); and environmental minimum temperature corresponding to the short-term cold start viscosity & le1000X10-6mm2 / s; and corresponds to a short period of time to allow the highest leakage oil temperature 90 ° C viscosity & ge10X10-6mm2 / s.
b, the index of the viscosity index (VI) is more directly reflects the nature of the oil viscosity with temperature change (ie viscosity-temperature characteristics of the oil), oil of high viscosity index, indicating that the oil viscosity changes with temperature The change to a lesser extent; larger. Well-known foreign manufacturers (such as Mobil, Shell, etc.), anti-wear hydraulic oil viscosity index are VI ge110, the domestic anti-wear hydraulic oil viscosity index VI = 95 or so. Foreign production of high viscosity index hydraulic oil (HV) are multi-grade engine oil viscosity index VI> 140. This is for the use of large-scale imports of hydraulic excavators and domestic hydraulic oil (or engine oil, hydraulic oil) the user shall pay special attention to. Viscosity index reduce shrink will allow oil to adapt to the ambient temperature range, unless the use of non-oil manufacturers should be query-related information, and shall make the appropriate adjustments to the scope of use of the oil, if necessary, should also change the settings of the equipment ( such as extreme temperatures, etc.).
Other comprehensive performance
Higher working pressure due to the large hydraulic excavator hydraulic system (& ge32MPa), allow the oil temperature of hydraulic oil of the highest high (90 ° C or so), so in order to ensure that the hydraulic system in the normal drain intervals. requires oil lubrication system selected, oxidation stability, abrasion, rust and corrosion, anti-emulsification, anti-foaming properties, shear the Cean qualitative as well as extreme pressure overload has good quality.
a good hydraulic oil cooling system
For large hydraulic excavator hydraulic oil cooling system (more precisely, the hydraulic oil temperature control system) to improve, although the manufacturers specific differences in the way, but the basic idea is the same, both the hydraulic oil temperature balance in continuous operation in the ideal range, but also make the hydraulic system to work in cold, quickly heating oil to normal operating temperature range (up to). Use a qualified hydraulic oil, hydraulic oil overheating check the temperature control system for hydraulic oil cooling steps are as follows:
b, the hydraulic oil cooler have dirt clogging, resulting in decreased cooling efficiency, if necessary, cleaning the radiator. Detect the fan speed, the actual working pressure under extreme conditions to determine the hydraulic parts of the circuit is faulty, the oil temperature sensor or control circuit is working properly. The fan speed and system pressure should be for the maximum; Otherwise, the corresponding parameters of the response system to adjust or replace the damaged components.
c, the system checks of the hydraulic parameters
At present, a large hydraulic excavator pump control There are two main ways: with pressure drying function (CUT-OFF function) of the limit load adjustment (GLR) and load sensing to regulate the manner of (LS). CUT-OFF function of, when system pressure reaches the setting value, the swash plate angle of the variable displacement pump is reduced, so that the pump can only remain in the residual flow conditions required to maintain the pressure, in order to avoid the pressure relief valve overflow produce overheating. To accomplish this, the system parameters match to CUT-OFF valve setting value is less than the setting value of the primary pressure valve in the circuit according to the technical requirements; Otherwise, the primary pressure valve is opened will cause overflow overheating. The same time, the secondary check valve work is normal, this work must be in strict accordance with the technical requirements to deal with system-related parameters, if necessary, recovery adjustment.
d to exclude non-normal within the vent
Mainly refers to cause the direction of the valve, pressure valve card bite caused by abnormal drain system hydraulic oil contaminated. Check method: measuring pressure, check the function, or to listen to whether there is abnormal noise (valve port closed lax \"cost-cutting erosion sound\") or touch to check whether the temperature is local too high.
e, to prevent component volumetric efficiency decreased
Non-normal wear and tear and normal wear and tear, should pay attention to. The former may occur within a very short time, check the quality of the oil and combine the function of the system is good or bad (such as the implementation of the component movements are normal, speed, etc.) to judge; the latter should follow certain rules, should be investigation, to take timely measures.








