What is the significance of the installation of hydraulic equipment for the system as a whole

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The installation of the hydraulic equipment is the hydraulic equipment normal and reliable operation is an important part.skiving machine
Hydraulic equipment installation process is unreasonable , even install error will cause the hydraulic equipment can not operate normally, has brought huge economic losses to the production, or even cause a major accident. Therefore, we must pay attention to the installation of this important part of the hydraulic system.bsp connector

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Brake sudden failure of the hydraulic brake system failure

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Phenomenon: the car is moving, kick or consecutive kicks brake, brake pedal were riding in the end, the brake suddenly failed.
 

Reasons:
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(1) serious brake line rupture or joints out of line.
 

(2) Cylinder sleeves damaged or riding turned.
 

(3) damage to the master cylinder cup or riding turn.
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(4) no brake fluid in the master cylinder.
 

Diagnosis:
 

The occurrence of failure of Zhidongshiling, should immediately stop checking. First observation of brake fluid leaks. BOOT at the brake fluid brake master cylinder push rod; brake master cylinder push rod dust cover at the brake fluid leakage current serious riding turned mostly master cylinder cup or punish severely damaged; system, such as a wheel a large number of the edge of the brake drum brake fluid, the Wheel Cylinder sleeves are the pressure turned or serious damage. Pipeline leak brake fluid is generally visible, in the absence of leakage of brake fluid phenomenon, you should check the master cylinder reservoir fluid indoor brake fluid adequacy.hydraulic fittings suppliers

 

 

 

 

Note the installation of hydraulic equipment

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Installation and commissioning of a new hydraulic equipment, general precautions are as follows:

(A) install the assembly, the first into the main hydraulic parts and accessories subject to stringent cleaning and removal of rust and against everything dirt harmful to the working fluid. Hydraulic parts and pipe the oil port plug, plastic plug, plugs, etc. With the gradual dismantling of the progress of the project, instead of first relieved, to prevent dirt from port to enter inside the components.

(B) must ensure that the inner and outer surfaces of the tank, the the host mating surface and the other visible constituent element is clean.skiving machine

(C) the components in contact with the working fluid over the exposed parts (e.g. piston rod) should be protected to prevent dirt from entering.

(D) fuel tank cap, nozzle and air filter must be fully sealed to ensure that the unfiltered air into the hydraulic system.

(E) shall provide an explanation in the fuel tank or near the fuel tank at the nameplate of the oil type and system capacity.bsp connector

(F) the working fluid filtration equipment specified to the required standard of cleanliness, and then injected into the system before.

(G) The hydraulics work agencies joined together to complete the scheduled action, so pay attention to the quality of the connection assembly between (as Heart degrees, relative position, force status, fixed and sealed good or bad).hydraulic fittings suppliers

 

Leakage of hydraulic valve shut down parts of the common faults

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Stuffing box leakage is often called leakage, called the closure of parts within the vent. Off pieces leak inside the valve, not easy to find.
 

Off pieces of leakage can be divided into two categories: one is the sealing surface leakage and other seals roots leak.
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Reasons causing the leak: bad sealing surface grinding; â'¡ The seals and the valve seat, the valve with no stringent; (3) the valve stem connection is not strong; â'£ stem bending and torsion, so up and down off pieces does not; â'¤ shut down too quickly, sealing surface contact is bad or has already damaged; improper â'¥ material selection, unable to withstand the corrosion medium; â'¦ regulating valve globe valve, gate use. Sealing surface withstand the erosion of the high-speed flow of the medium; â'§ certain media, gradually cooling valve is closed, the sealing surface appear slit will produce erosion phenomenon; â'¨ some of the sealing surface of the valve seat, the valve and the using the threaded connection between prone to oxygen concentration cell corrosion loose; the â'© due to welding slag, rust, dust and other impurities embedded, or mechanical parts fall off blocked spool in the production system, the valve can not be closed.hydraulic hose assemblies
 

Precautionary approach:
 

â'  before use must be carefully test pressure leak testing, found the leak or seal sealing surface roots leakage, handle before use; â'¡ to check in advance the various components of the valve is in good condition, can not use stem bending and torsion or the valve stem connection unavailable * valve; â'¢ valve crucial to make steady fresh, do not make Meng Jin, such as poor contact between the sealing surface or block obstacle should immediately open slightly, so that the debris outflow, then carefully closed; â'£ selection of valve , to consider not only the corrosion resistance of the valve body, but also to consider the closed parts of the corrosion resistance; â'¤ according to the structural characteristics of the valve, the proper use of the regulating valve should be used to adjust the flow of parts; â'¥ for medium cooling off valve large difference in temperature, to cool down before the valve closed look; the â'¦ seat, the valve flap and seal with threaded connect ion, you can use PTFE with filler thread, so that there is no gap; â'§ may fall into the valve of impurities, plus valve before the filter.hydraulic ferrule

Hydraulic equipment installation debugging

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(A) Jog: Jog pump, observe the oil pump rotation is correct, power, anti-oil output and sometimes also likely to have an accident, so remember when operation starts only "jog". Get ready for continuous operation when the pump sound normal and continuous output of oil and other irregularities, and no-load debugging.

(B) no-load debugging: the first l0 20 minutes at low speed, is sometimes necessary to remove the motor and the load of the fuel tank or oil connection. Especially during the cold season, with no load at low speed (warming up) is particularly important, some imported equipment often have strict requirements, some equipped with a heater tank fluid warming. The first trial run be able to run in the low-speed low-voltage action.hydraulic hose fitting

(C) uniform gradually boost acceleration, the specific method of operation is repeatedly tighten and immediately loosen the relief valve, pressure or flow rate of the flow valve to adjust the handle a few times, and pressure gauge observed pressure lifting speed changes and actuators changes in conditions such as heat, vibration and noise of the pump. Found the problem to analyze and solve.

(D) the debug single action combined with electrical machinery in accordance with the action cycle table first, and then transferred to the cycle of action debugging, check each action whether coordination. Generally will be in the process of debugging some problems, such as crawling, impact, and no change to other faults of complex domestic and imported equipment, if there is a difficult problem to solve, can be common consultation, if necessary, resort to hydraulic equipment manufacturers.hydraulic hose assemblies

(E) Finally, enter the full load debugging, the maximum working pressure and the maximum (minimum) speed test the technical performance of hydraulic equipment, check the power, heat, noise and vibration, high-speed impact, low-speed crawling. Check the various parts of the oil spill, the often-load does not leak site increased pressure Shique oil spill. Found the problem immediately removed, and make a written record.

If everything is normal, trial processing specimens. Commissioning is completed, after stopping machine generally want to recover and make a detailed debug log file. Some imported equipment debug log can be used as the basis for the claim.hydraulic ferrule

(F) by applying the above debugging good handle of the hydraulic equipment, and generally do not move. Handwheel on the upcoming packaging factory equipment should release all. Long-term without the equipment, should be the handwheel release the pressure valve to prevent the spring permanent deformation affects the mechanical equipment enabled various types of failures affect performance.

 

 

 

Common failure of the hydraulic valve stem down failure

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The the stem down failure reasons: â'  The operation excessive thread damage; â'¡ lack of lubrication or lubricant failure; â'¢ stem bending and torsion; â'£ surface finish is not enough; â'¤ fit tolerances are not allowed to bite too tight; â'¥ stem nut tilt; improper â'¦ material selection, such as stem and stem nut is made of the same material, easy to bite; the â'§ thread is corrosive medium (dark bar valve stem nut in the lower part of the valve); â'¨ lack of protection of open-air valve stem thread covered with dust and sand or rain frost and snow are corroded.
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Prevention methods:
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(1) careful operation, when closed, do not make Meng Jin, open to the top dead center, do not open enough will handwheel rewind twice, so that the thread on the side of the adhesion, to avoid media to promote stem upward impact; (2) regular checks of lubrication, maintaining normal lubrication; â'¢ Do not use a long lever opening and closing valves, accustomed to using a short lever workers forced to strictly control the sense of proportion, to prevent bending and stem (hand wheel and stem directly connected to the valve); â'£ improve processing or repair quality, meet regulatory requirements; â'¤ materials to corrosion, to adapt to the working temperature and other working conditions; the â'¥ stem nuts not to use the same material with the stem; â'¦ plastic for stem nut to checking the strength to not only consider good corrosion resistance and low coefficient of friction, must also consider the intensity of the problem, the strength is not enough, do not use; â'§ open-ai r valve stem protection sleeve to add; the â'¨ normally open valve, want to turn the hand wheel on a regular basis, so as not to stem rust live.hydraulic fittings suppliers

Other problems common to hydraulic valves

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Gasket leak: the main reason is impatience corrosion, not suited to working temperature and pressure;, high temperature valve temperature changes. Prevention: adapt to the working conditions of the washer, want to check on the new valve gasket material suitability should be replaced if not suitable. High temperature valve to use tight again bolts.
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Body cracking result: generally frozen. When it s cold, the valves should have insulation and heating measures, otherwise discontinued after should the valve and connecting pipe in the water to drain clean (if there is a valve at the end plugs, open wire blocking drainage).
 

The hand wheel damage: due to the impact or long lever violently operation. As long as the operator and other relevant personnel, could have been avoided.
 

Packing gland rupture: compression packing uneven force, or gland (usually cast iron) defective. Compression packing, rotary screw symmetry to not skew. Manufacture not only pay attention to the large and critical pieces, should also pay attention to the elements of the gland such times, otherwise the impact of the use.bsp connector
 

Stem and the valve plate connection failure: gate valve stem rectangular head with ram T-slot connection in the form of more T-shaped groove sometimes not processing, so that the stem rectangular head wear faster. Mainly from manufacturing to solve. But the use of units of the T-shaped slot complement processing it finish.hydraulic fittings suppliers
 

Gate valve gate can not be pressed tightly cover: double plate tension * top wedge, some poor valve, top wedge material (low-grade cast iron), using the soon worn or broken. The top wedge small pieces, not many of the materials used, using the unit can produce its own carbon steel, replaced the original iron castings.