Focus position of the vehicle which sealed

Focus position of the vehicle sealing the following areas:

First, the vehicle doors and windows sealed

Before installing the glass doors of the vehicle to clear the debris carefully notch within such as mortar, brick dust, wood, etc., should be placed carefully on the glass, ensuring that both sides of the gap is uniform and timely than the positive fixed to prevent collisions shift deviate from the slot center. Rubber seal can not pull too tight, cutting length longer than the assembly length 20-30mm. When installing the mosaic in place, flat surfaces, and glass notch in close contact, so that the glass surrounding the force evenly. In the corner of the rubber should be beveled off and disconnect the injection of glue at the firm. When caulk sealant fixed glass, you should use rubber or rubber block glass and choked, leaving voids plastic injection, plastic injection depth should not be less than 5mm, before the glue curing, the glass should be kept free from vibration.

Second, the leading edge of the vehicle seal, the seal along the side edges and

Support from the hood, on the bonnet leading edge, a trailing edge and side edges of the body of the anastomotic site and paste, can the gap between the hood and the body effectively sealed vehicles on the way, can accelerate the air from the intake gate through the improved thermal performance. At the same time, you can reduce the hood and the front part, the friction between the left and right front fender, reducing noise and friction caused by the bump. If the gap is large, you can paste layers.

Three, four slits seal between the door and the vehicle body

Four of the gap seal between the door and the vehicle body, the vehicle can improve the sealing performance, reducing wind noise. Improve sealing performance can also prevent dust, rainwater into the cockpit to improve the efficiency of air conditioning and refrigeration. Carefully coated with special glue on the inside of the door, will cut a good seal side also coated with special glue, then along the inside of the door ring seal affixed.

Fourth, skylights and other components inside sealed

On the roof around the paste, can effectively improve the seal, dustproof and waterproof; wrapped pipes for air conditioning and refrigeration, can improve the cooling efficiency.tamper seal tape Between the door trim panels and the gap between the dashboard, storage boxes and other interior parts of the car, because the assembly and machining accuracy and other reasons, there is often friction, vehicle process will cause resonance at different speeds generate disturbing noise, which is generally very difficult to find. In fact, know the reason, as long as the seal to fill these gaps, paste.

Fifth, there is the door seal sealing flange

When the door flange seal repair, the repair should be noted that damage to the sealing flange, the flange accurately recover the original shape. After repairing the door seal to conduct inspection, inspection methods are: put a piece of cardboard in a sealed position, close the door, and then pull the paper, according to the Rally to determine the size of the seal is good. If the force required to pull the paper too much explanation sealed tight, it will affect the normal shut the door, and also due to deformation of the seal over the Omo rapid loss of sealing performance; If the force required to pull the paper through the small, indicating that the door seal seal bad, the wind will always be a door without rain phenomenon. metal security seal When replacing the door must pay attention to the inner and outer door panels in the new bite at the painted folding plastic cuffs and put some holes left when punching with the base tape blocked.

Do the above seal, your car will be able to rain or shine, for you to make the power of pleasures efficiency! In the rainy season will not shed tears for no reason!

Pump mechanical seal dimensional inspection should pay attention to several issues

1 , lubrication
The mechanical seal faces should be properly lubricated , thus reducing wear and prolonging life , some lubricant friction heat can also be taken away . Lubricants generally assumed by the media itself , thus sealing face ( ring, stationary ring ) see spring pressure should not be too large.
2 , flush cooling
Pump mechanical seal end face of the work so that the heat generated should be promptly passed out, otherwise it will vaporize liquid film between the end faces formed by dry friction, flush cooling measures must be considered .
Generally flush with internal coolant security seals sealing medium , may also have an external water supply cooling water. Should be used in mechanical seal flushing coolant absolute guarantee of supply and flush the coolant flow, if necessary cleaned regularly.
3, the old seal update
In contrast with the new mechanical seal better than the old , but the new mechanical seal quality or choice of material is not the time , with the larger size of the error will affect the sealing effect ; sexual penetration in the polymerization medium, the stationary ring without excessive wear, or not to replace as well. Because static ring stationary ring seat for a long time in a quiescent state , the polymer and impurities deposited as a whole, played a good seal.
4 , the seal overhaul
Once the mechanical seal leakage will be eager to overhaul , in fact , sometimes sealed and not damaged , tamper seal tape simply adjust the working conditions or the seals can be adjusted to eliminate leakage. This way to avoid waste and to verify their ability to judge the fault has accumulated experience in maintenance to improve the quality of maintenance .

Sealing butterfly valve with hard seal butterfly valve and use of the distinction

Valve seal means sealing the sides are rigid metallic material or other materials are called "hard seal ." This seal sealing performance is poor, but high temperature, abrasion resistance, good mechanical properties , such as : steel + steel ; steel + copper ; steel + graphite ; steel + alloy ; ( where steel may be cast iron, cast steel, alloy steel may be surfacing , spraying the alloy ) .
Soft sealing : sealing the sides of the metal material side , the other side there is a flexible non-metallic materials are called "soft seal ." This seal sealing performance is good, but not high temperature, easy to wear, mechanical poor , such as: steel + rubber ; steel + PTFE [wiki] polyethylene [/ wiki]; etc. soft sealing seat using a certain strength , hardness and heat resistance of non-metallic materials, good sealing performance, zero leakage can be done , but the life and relatively poor adaptability to temperature . Hard sealed with metal production, sealing performance is relatively poor , despite the manufacturers claim can be done zero leakage. Soft seal on the part of corrosive materials can not meet the technical requirements , the seal can be solved ! These two seals can complement each other , just in terms of soft seal tightness is relatively good , but now it is possible to seal tightness meet the corresponding requirements ! soft seal the advantage of good sealing performance , the disadvantage is easy to aging , wear, short life. Seal long life, but the relative tightness worse than the soft seal .
Their structural differences are mainly the following:
1, the structural differences : soft meter seal butterfly mostly in line more than a single eccentric hard sealing , double eccentric butterfly valve
2 , temperature : soft seal for normal environments. Seal can be used for low temperature , room temperature , high temperature and other environmental
3 , pressure: soft sealing pressure - atmospheric pressure seal can also be used in high-pressure and other conditions
4 , the sealing performance: soft seal and three eccentric hard sealing butterfly valve sealing performance is better, three eccentric butterfly valve in the high pressure high temperature environment can maintain a good seal.
In view of the above characteristics, soft plastic padlock security seals butterfly valve for opening and closing the ventilation and dust piping bidirectional adjustment, water , light industry, petroleum, chemical and other industries. Hard seal butterfly valve used for heating, gas , and coal gas , oil, acid and alkali environment .
With the widespread use of butterfly valves , its easy installation, easy maintenance , simple structure features becoming increasingly apparent. Electric soft seal butterfly valve, pneumatic soft seal butterfly valve, hard seal butterfly valve in more and more places began to replace the electric gate valve, globe valve.

Auto Repair in handling point on the sealing performance

In the window glass is damaged, changing with the same curvature as the original glass window glass, while the glass to check the guide groove and seal for damage. Because windows often reply after repair is less than its original shape, therefore, when in addition to ensure easy pulling or lifting the window glass, but also pay attention to the window glass in the windows closed after four weeks of the seal.
In the repair of automotive line, should all body holes, holes worn harness ring is mounted at the place, not only because these seals from the seal, but also play a protective role in the harness. If the seal is damaged or harness can be rotated or ran seals, replace the seals, and compares it with the body holes, hole assembly firmly secure the harness is good.
Fix the sealing flange in the vehicle door, the seal should be noted that repair damaged flanges, flange accurately restore the original shape. To carry out the repair after the door seal inspection, the inspection method is: put a hard disk in a sealed position, shut the door, and then pull the paper, according to the Rally to determine the size security ties is good. If the force required to pull the paper too much explanation sealed tight, this will affect the doors close properly, and also due to deformation of the seal over the Omo faster mourning for sealing performance; if the force required to pull the paper too small, indicating bad seal doors wind does not often appear rain phenomenon. When replacing the door must pay attention to the inner and outer door panels in a new office painted folding plastic flange bite and put some punch hole left when the small craft with the base tape blocked.
When replacing the entire body, in addition to each of these projects should be completed outside, but also in the lap portion of the weld joints on both coated with sealant layer thickness should be about 1mm, and may not have virtual sticky layer , bubbles and other defects; should be at the Flap Flap special plastic coated; across the floor surface and the lower surface of the front cover should be coated 3mm-4mm elastic coatings and anti-corrosion coating; on the floor surface and the front elevation To paste the plate surface noise, heat, vibration damping film, then covered insulation blankets block, and finally covered with carpets or fitted with decorative flooring. These measures can greatly enhance the sealing and the vehicle speed slows down corrosion of the body, but also can greatly enhance comfort.
In changing the roof, the roof should be in place around the lamination coated conductive sealant, after a good to be welded seams in the water tank and folding over the painted plastic, which not only helps the body black cable ties, prevents the body due to more water to produce the weld flange early rust. Assembling the door when the door below the window paste an entire inner panel sealing barrier film, if not forming a seal barrier film, you can use ordinary plastic instead of paper, and then affix the seal spacer film compaction, and finally for trim panel assembly production

The new product structure

In recent years, as people on the importance of sealing technology, the new sealing structure emerging, on a technical level, the level of quality, cost and other aspects to meet the domestic market demand and the international market.
1, the new seal: This seal is equipped with a test truck seal (rotating seal) disclose the amount of sensors that can be used online leak detection equipment by Simrit exclusive launch;
2, Evd sealing system: cylinder seal wear and deformation, through a special device to regulate the seals (elastomer) internal pressure to eliminate leakage, very high reliability requirements for the equipment (such as servo cylinders, water tanks) . Hunger launched by the company;
3, using the new seal SETCO AirShieldTM integrated spindle friction sealing and advantages of labyrinth seals. Compressed air tangentially into the fixed front bearing cycle trough, and the spindle together constitute a closed maze. Air flow in the tank around the spindle. Games like vortices produce a uniform pressure to a uniform distribution of air flow. Combined with a flexible sealing lip, dirt will leak air from the spindle, the bearings mainly blown;
4, the structure of innovation PTFE seals: PTFE seals spawned many new structures, used in reciprocating seals, rotary Cable tie, static seals, such as AQ seal, PTFE-V-ring sealing systems such as the Pan-Cypriot seal with the main seal.

The hydraulic seal lip seals

U-shaped ring: U-ring sealing (container seal)performance is good, but is easy to roll alone, U-shaped seal friction resistance and with the increase of pressure. Therefore, the U-shaped seal lower working pressure is only suitable for low speed or movement of the hydraulic cylinders used.
V-ring: V-ring must be compatible with the supporting ring and pressure ring, V-ring cable sealing performance is better, according to the size of the working pressure seals used to determine the number of adjustments can be compensated by means of the pressure ring seals wear, V-shaped ring disadvantage is the complex structure, the friction resistance. Therefore, the V-shaped ring appropriate only relatively low velocity higher working pressure of the hydraulic cylinder used.
YX-ring: YX-ring with a cross-sectional width height ratio greater than 2, and based on the use of stability requirements, YX-ring work lip lip is shorter than the non-working, whereby the shaped seal into hole YX YX-shaped ring and shaft seal, YX-rings can be used without rolling, so YX-ring suitable for high-pressure, high-speed selection of the hydraulic cylinder.
Hydraulic Seals-O-Ring
O-ring cross-section of the O-simple shape, made of rubber, wear resistance as polyurethane, so that the hydraulic system is mainly used for static sealing.

Hydraulic oil on the performance of the seal

Regardless of what kind of material, should have the following properties:
1, with some mechanical and physical properties: such as tensile strength, elongation strength, elongation;
2, there is a certain degree of flexibility, hardness fit and compression set;
3, the working media, not prone to swelling, decomposition, hardening;
4, wear, there are some anti-tear properties;
5, high temperature, low temperature aging.
However, there is no sealing materials include all of the above properties, the need to work environment, such as temperature, pressure, media and sport mode to select the suitable sealing material, and through the development of materials with recipe to meet certain requirements. Or the use of composite materials or a combination of two or more structures in the form of play to their strengths, to achieve more comprehensive results.
Seal formation: dynamic security seal is divided into non-contact seals and contact seals. Non-contact seal mainly a variety of mechanical seals, such as: graphite packing ring, floating ring seals; rubber composite seals and rubber seals belong portfolio contact seals, relying on filling in a sealed chamber in the pre-compression force, leakage channel blocking sealing effect is obtained. Seals used in hydraulic systems are mostly static seal (seal), reciprocating seals (piston, piston rod seal) and rotating Meter seal.
Factors affecting the sealing effect: seal structure selection and film formation, pressure, temperature, material compatibility, dynamic sealing contact with the working surface of the material, hardness, geometry, surface finish.

Qiu Xiao Meng cool seals security seals

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