ÍøÕ¾Ê×Ò³ Õ¾µãµØͼ ¼ÓÈëÊÕ²Ø

• ¹«Ë¾ÐÂÎÅ
• ÐÐÒµ¶¯Ì¬
• ÍøÕ¾¹«¸æ

1) required the choices affordable models of working conditions with the host mechanical seal match, in order to ensure the the mechanical seal normal operation and use life. 2) install the mechanical seal parts of the shaft (sleeve) radial runout tolerance should be ≤ 0.04mm, the rotor axial runout ≤ 0.1mm. 3) install the mechanical seal stationary ring sealed cover (or shell), positioning the end face of the shaft verticality ≤ 0.04mm. 4) mechanical seal in the installation, is necessary to the shaft (sleeve), the sealed cavity, the sealing cover and mechanical sealing itself clean, to avoid any impurities into the seal area. 5) walks medium temperature is too high, too low, or contain impurities particles, flammable, explosive, toxic, it is necessary to reference the relevant norms of the mechanical seal, take the appropriate resistance seal, erosion, and cooling, filter and other measures. 6) should be appropriate to the smooth installation of the mechanical seal. Interpretation of the book, and to protect the mechanical seal installed size product installation. 7) equipment in operation essential overflowing media to avoid dry friction, sealed into force. 8) samples in a single spring drive mechanical seal, a reasonable choice of the spring rotation, individual axle steering clockwise to be elected, the right-handed spring from the end of stationary ring. Otherwise elect left spring. Mechanical seal installation and use of skills essentials the equipment shaft of radial runout should ≤ 0.04 mm, the axial runout impermissible greater than 0.1 mm; 2, sealing parts of the equipment should be installed to maintain clean, sealing parts should be cleaned, intact seal faces to avoid impurities and dust into the sealing parts; installation process non-crashing, banging, lest the mechanical seal friction to pay damage seal into force; 4, when in contact with the sealing surface should be coated a layer of clean mechanical oil, in order to successfully install; install stationary ring gland, tighten the screws required average force protection of the stationary ring with the vertical axis request; 6, install hand promote the snap ring, make the snap ring on the shaft smart move, and there are certainly flexible; 7, after installation by hand plate moving shaft, the shaft should be light and heavy feel; 8, media equipment necessary in the operation before overflowing to avoid dry friction, sealed into force; 9, is easy to crystallize, granular media, media temperature> 80oC should take corresponding erosion, filter, cooling approach, various adjuvant installation, refer to the relevant specifications of the mechanical seal 10, the installation should be in contact with the sealing surface coating a layer of clean mechanical oil, to be a special focus on the choice of machine oil on the different adjuvant seal material, to avoid the formation of the early entry into force of the the invasion oil contraction of the O-ring or decelerate aging, forming a seal. 11 seal face runout should not rain 0. 05mm, install the mechanical seal swap the amount of shrinkage is the crux of the ethylene-propylene rubber O-ring is severely prevent smooth oil; Another example is upstairs said, Seamer

1, task principle of the mechanical seal

Mechanical seal by a pair or absolute sliding face perpendicular to the axis, accompanied by his assistant, seal and shaft seal installation reaches the stop leak fluid pressure and compensate for the elastic (or magnetic) role to maintain paste merger.

2, the selection of data commonly used mechanical seal

Shimizu; room temperature; (dynamic) 9Cr18, 1Cr13 surfacing cobalt-chromium-tungsten, cast iron; (static) dip resin graphite, bronze, Bakelite.

River water (including sediment); room temperature; (dynamic) and tungsten carbide, tungsten carbide (static)

Seawater; room temperature; (moving) tungsten carbide, 1Cr13 surfacing cobalt-chromium-tungsten, iron; (static) the dip resin graphite, tungsten carbide, cermet;

Over hot water of 100 degrees; (dynamic) tungsten carbide 1Cr13 surfacing cobalt-chromium-tungsten, iron; (static) the dip resin graphite, tungsten carbide, cermet;

Gasoline, lubricating oil, liquid hydrocarbons; room temperature; (dynamic) and tungsten carbide, 1Cr13 surfacing cobalt-chromium-tungsten, iron; (static) the dip resin or tin-antimony alloy graphite, Bakelite. Seamer

Gasoline, lubricating oil, liquid hydrocarbons; 100 degrees; (moving) tungsten carbide, 1Cr13 surfacing cobalt chromium tungsten; (static) dip bronze or resin graphite.

Gasoline, lubricating oil, liquid hydrocarbons; containing particles; (moving) tungsten carbide; (static) tungsten carbide.

3, sealed variety and usefulness of the information

The seal information should be satisfied the request of the sealing function. Different media to be sealed, and the equipment of different task conditions, with different request seal information adaptability. Individual request of sealed information:

1) information dense is good, not easy to leak media;

2) have the appropriate mechanical strength and hardness;

3) contraction and resilient the eternal small deformation;

4) high temperature hardening, not synthetic, low temperature hardening, non-brittle fracture;

5) anti-erosion performance in the medium to long-term task of acid, alkali, oil, small volume and hardness changes, and does not adhere to the metal surface;

6) a small coefficient of friction, good abrasion resistance;

7) with the flexibility of the joint with the sealing surface;

8) anti-aging and good durability;

9) the processing and production facilities, the price is cheap, easily drawn. Seamer

Sealing rubber is the most commonly used item. Rubber affordable in doing the seal data are graphite, PTFE and a variety of sealants.

4, installation of mechanical seals, the use of skills essentials

1) equipment by radial runout should ≤ 0.04 mm, the axial runout license is not greater than 0.1 mm;

2) sealing parts of the equipment should be installed to keep clean and the sealing parts should be cleaned, intact seal faces to avoid impurities and dust into the sealing parts;

3), the installation process non-crashing, banging, lest the mechanical seal friction pay broken seal into force;

4), installed in contact with the sealing surface should be coated with a layer of clean mechanical oil, in order to successfully install;

5) install stationary ring gland, tighten the screws required average force protection of the stationary ring and the vertical axis request;

6), installed hand promote the snap ring, make ring on the shaft smart move, and certainly flexible;

7), installed hand plate moving shaft, the shaft should be no light and heavy feel;

8), equipment in operation essential overflowing media to avoid dry friction, sealed into force;

9), crystal granular medium, medium temperature> 80oC should take corresponding erosion, filter, cooling approach the various adjuvant installation please reference the mechanical seal specification. Seamer

10) installed in contact with the sealing surface should be coated with a layer of clean machinery oil, special emphasis on the choice of the mechanical oil different adjuvant sealing material, to avoid the formation of the O-ring invasion oil contraction or deceleration aging to form a sealed early effect.

5, the mechanical seal which three seal point and seal the three points sealed principle

Dynamic sealing between the ring and the stationary ring: a proper clamping force (than are generated by the elastic member (spring, bellows, etc.) and the sealing pressure of the liquid on the contact surface of the absolute motion of the movable ring and the stationary ring (end) pressure) so that the two light, the flat end face tight fit; maintain a thin layer of the liquid film between the end faces and reaches the sealing effect. This film includes a fluid dynamic pressure and static pressure, which plays the role of the pressure equalization and smooth ends. The reason why both end faces required height bright straight to satisfactory fit to the end face of the invention and to make than the pressure of the average conditions, this is the absolute rotary seal. ???

6, the mechanical seal techniques varieties

Later to take the new information and process various mechanical seal new skills faster pause, following mechanical seal new skills. Sealing surface grooved sealing techniques in recent years, the seal end face of the mechanical seal to open a variety of flow slot, to generate the hydrostatic, the dynamic pressure effect, is now also has been updated. Zero leaked sealing techniques over and always thought-contact and non-contact mechanical seal can not reach zero leaked (or leaked). Israel Application slotted sealing techniques, zero leaked non-contacting mechanical face seal a new concept, and has been used in the nuclear power plant in the smooth oil pump. Dry-running gas seal skills such seal is slotted sealing techniques for gas seal. Upstream pumping seal skills that apply sealing surface open launder the upstream small amount leaked fluid pumped back upstream. The structural characteristics of the types of sealed: take shallow groove, and are micron film thickness and launder deep level, and take the smooth groove, the radial sealing dam and circumferential sealing weir seal and bearing part. Slotted sealing dimensional seal and the slotted bearing the joint. Its strengths leaked a small amount (without even leaked), film thickness, clear contact friction, power consumption and heat a small. Thermal hydrodynamic seal tips it is applied to various shapes of the deeper flow slot of the sealing surface, forming part of the thermal deformation, in order to generate fluid energy wedge effect. This to have hydrodynamic bearing can seal, called thermal fluid energy wedge sealed. Seamer

The bellows seal skills can be divided into forming metal bellows and welded metal bellows mechanical seal skills.

Multi-face seal skills into double sealed intermediate ring seal, multi-sealing techniques. Another parallel surface sealing skills, monitor sealing techniques, combined sealing techniques.

Mechanical seal erosion plans and features

The scour target is that to avoid impurities accumulating avoid the airbag formed, maintained and improved smoothness, etc., when the the scouring liquid temperature is low, both the cooling effect. The scour important as follows:

First, within scour

1. Being washed

(1) Feature: the application tasks hosts are sealed media, through the pipe from the pump outlet into the sealed chamber.

(2) Application: used to clean fluids, p1 is slightly larger than the p-adic, coolers, filters can be set in the pipeline when the temperature is high or impurities

2. Anti-erosion

(1) Feature: the application tasks hosts are sealed media from the outlet end of the pump into the sealed chamber, after scouring through the pipe to flow back to the pump inlet.

(2) Application: used to clean fluids into the 3 p. Full erosion

(1) feature: the application tasks hosts are sealed media, through the pipe from the pump outlet into the sealed chamber, washed and then administered by road to flow back to the pump inlet.

(2) Applications: cooling effect is better than the first two for the clean fluid and p1 and p in and p out close.

Second, outside scour

Characteristics: the introduction of outside the system with clean compatible fluid sealing medium erosion to the sealed chamber.

Applications: outer scouring fluid pressure should be higher than is sealed medium 0.05 - 0.1MPa utility in the medium to the place of the high temperature or solid particles. The flushing fluid flow to protect the heat away, need satisfaction scour need not produce the erosion of seals. To do this, you need to master the seal chamber pressure and flow rate of erosion, the the individual clean scouring liquid flow rate should be less than 5 m / s; syrupy liquid containing particles to be less than 3 m / s, to reach above the value of the flow rate, scouring liquid with <0.5MPa, the difference between the pressure of the sealed chamber shall the individual take 0.05 - 0.1MPa, double mechanical seal desirable 0.1 - 0.2MP scouring liquid entry and exit of the sealed chamber orifice status, should be set in the vicinity of the seal faces and should be close to the side of the snap ring, in order to avoid graphite ring erosion or deformation due to uneven cooling temperature difference is caused, and impurity accumulation and coke, etc., can be taken to the tangential introduction of one or more points scouring. necessary, flushing liquid can be hot water or steam.

ÏÂһƪ ¡ý The seamer application range and works
ÉÏһƪ ¡ü ÉÇÍ·ºçÇÅÕæ¿Õ×Ô¶¯·â¹Þ»úµÄÓ¦ÓÃÓÅÊƽéÉÜ