Some standard content:
J22
JB
Standard of the Machinery Industry of the People's Republic of China
JB/T6629-93
Mechanical seal circulation protection system
Published on 1993-05-07
Ministry of Machinery Industry of the People's Republic of China
Published
Implemented on 1994-01-01
Standard of the Machinery Industry of the People's Republic of China
Mechanical seal circulation protection system
1 Subject content and scope of application
JB/T 6629--93
This standard specifies the working mode and function, composition, process, selection principle, piping, flushing, cooling or insulation, filtration and separation of the core seal circulation protection system (hereinafter referred to as the sealing system). This standard applies to mechanical seal systems. Its working parameters are: medium oil, water, chemical liquid, liquid containing impurities: pressure 0~6.3MPa temperature -100~+380℃
2 Working mode and function
2.1 The working mode of the sealing system is circulation flushing or injection lubrication. 2.2 The sealing system has the functions of lubrication, flushing, temperature adjustment, pressure adjustment, impurity removal, medium replacement, dilution and flushing of leaking medium. 3 Composition
3.1 The sealing system is composed of basic components such as pressure tank, booster tank, heat exchanger, filter, cyclone height divider, orifice plate, etc. 3.2 The general sealing system also includes sealing chamber, end cover, shaft sleeve, sealing chamber bottom bushing, cover auxiliary seal, pumping ring, pipe fittings, valve parts, instruments, etc.
3.3 The basic components, pipe fittings, valve parts and instruments of the sealing system constitute a centralized sealing liquid station. Process
4
The process of single-end mechanical seal system is shown in Table 1.4.1
The process of double-end and interlocking mechanical seal system is shown in Table 2.4.2
Table 1 Single-end mechanical seal system process
serial number
1
2
3
type
type
Forward self-flushing
Reverse self-flushing
Jacket heat exchange
Process function
Flush
Flush||tt| |Lingque
Or guarantee
Approved by the Ministry of Machinery Industry on 1993-05-07
Businessman
Picture
Use Schiseppe||tt| |cat ring pre-reduction
milk retention
device composition
orifice plate
orifice plate
clamping
say||tt ||Ming
Self-flushing from the pump outlet through the orifice plate to the sealing chamber
, the pressure path of the sealing chamber has a rise
high, used for general cleaning conditions||tt| |Self-flushing from the sealing chamber through the orifice plate to the pump inlet
, the pressure in the sealing chamber drops slightly
, which is used for temperature cleaning conditions
due to the use of heat exchangers There is no flushing,
the temperature used for cleaning is not high or it is necessary to add
thermal protection conditions
Implemented on 1994-01-01
1||tt| |Serial number
6
9
10
Class
Type
Forward self-flushing
+heat exchange| |tt||forced circulation
flushing + heat exchange
forward self-flushing
+passing
forward self-flushing
+cane liquid separation
Forward self-flushing
+filtration+exchange gain
forward self-flushing
high ten-cylinder liquid concentration
+heat exchange||tt| |Change media flushing
Ten comprehensive controls
Legend:
2
Process function
Flush
Change
Hot
rinse
hot
secondary wash
removal
removal
flush
removal
removal
rinse
remove
impurities
change
heat
flush
wash
remove|| tt||Change
Miscellaneous
Hot
Flush
Change the medium
Comprehensive control
Cooler
Regulations Settings
Pressure gauge with shut-off valvebzxz.net
Dial thermometer
Pressure switch with shut-off valve
Businessman
JB/T662993||tt| |Continued Table 1
Figure
Set when specified
Set when required
q@
Set when specified
Set when specified
Recommended by the manufacturer
PC
Recommended by the buyer
Device composition
Orifice plate
Heat exchanger
Heat exchanger
polymer ring
filter
orifice plate
hydrocyclone height divider
filter
orifice plate| |tt||Heat exchanger
Hydrocone
Heat exchanger
Said
Ming
From the system outlet through the orifice plate and cooler to
Self-flushing of the sealing chamber, used for high-temperature cleaning
Conditions
Self-flushing flow from the sealing chamber through the feed ring and ring parts
back to the sealing chamber , used for high-temperature cleaning conditions
Self-flushing from the pump outlet through the stabilizer and orifice plate to
the sealing chamber, used for glycosides with mild and small amounts of impurities
From the outlet of the system to the energy liquid Self-flushing from the device to the seal
cavity. The inlet is connected to the pump outlet, the Xiangdian hole is connected to the sealing cavity, and the underflow hole is connected to the pump inlet
, which is used for purification and impurity conditions
from the pump outlet through the filter, orifice plate, ||tt| |Self-flushing from the cooler to the sealing cavity, used for
high temperature and small impurity conditions
self-flushing from the pump outlet through the manifold, cooler
to the sealing cavity. Used for high temperature and miscellaneous conditions
flushing fluid supplied from the sealing fluid station,
flushing into the sealing chamber. The external flushing fluid must be aerobically compatible with the medium. In the sealing liquid station, the pressure seam, total sealing station
device, heat exchanger, orifice plate, hydrocyclone, pump, damper, instrument, etc. are configured as needed. Used for medium unannounced flushing or high parameter close matching
serial number
2
category
hydrocyclone separator
flow indicator|| tt||Y-type filter
flow regulating valve
stop valve
check valve
orifice plate
type
injection Type accurate sliding
circulating flushing system
+heat exchange
circulating flushing
+heat exchange+pressurization
process function||tt| |Player
Change the medium
Flush
Heat exchange
Change the medium
flush
wash
change|| tt||Hot
Change media
Medium
?
3B/T6629-93
Table 2 Double-end and tandem mechanical seal system process provider| |tt||Injection intention
Set when specified
Set when specified
Gas connector
Liquid level gauge
Liquid reservoir||tt| |?
Beautiful Room
Emperor Kai
Injection Cold
Position Meter
Accumulator
Standard Design||tt ||People (can be chip
Formula
Number of policy lines
External pressure source
Normally open
Even with human plug
Displacement meter
blocking buffer
set when specified
(can be photo
style)
Dunbo
device composition| |tt||Yuli tank
Pressure tank
Heat exchanger
Pressure tank
Or booster buffer
Heater||tt|
Injection lubrication from the high pressure to the sealed chamber. There is no return line and no circulation. The high pressure is not pressurized, and the flushing wave pressure depends on the high tank pipeline. Liquid column
pressure maintenance, used for low pressure, normal temperature, clean conditions
flushing from high pressure to seal chamber
, with return pipeline, thermal siphon pin The high-end end is not filled with pressure, and the flushing pressure is maintained by the liquid column pressure in the high-level tank pipeline. The detector can be configured for low pressure, high humidity, and cleaning. Conditions
Flushing from the pressure or boosting seam to the sealing
cavity. There is a liquid return pipeline, which can be thermally siphoned or forced to circulate. The sealing pipeline is connected to an external pressure source for pressurization. If pressure is used The tank
still needs to be installed at a high position. If a booster tank is used, there is no need to install it at a high position. A cooler can be configured for high pressure, high channel, and clear conditions
serial number
category| | tt | | tt | Value sealing device. 5.2 Sealing devices for high viscosity and low viscosity volatile media. 5.3 is used for sealing devices of dangerous and harmful media, and 5.4 is used for sealing devices of media containing impurities. For use in heavy duty mechanical seals.
5.5
5.6
is used for gas phase medium sealing devices.
6 piping
6.1
The nominal diameter of the sealing system piping shall not be less than 15mm. 6.2 The valve alone shall not be used as an adjustment device for flushing wave volume in the sealing system. Device composition
Sealing fluid station
Said
Ming
The flushing fluid supplied by the sealing fluid station,
, is flushed closely. The seal reduction station is equipped with various sealing system components as needed, which can comprehensively control the working conditions of the seals and is used in conditions such as high temperature, high pressure, impurities, high viscosity, poisoning, corrosion, etc.
6.3. The sealing system piping interface has the structural position type shown in Figure 1, Figure 2 and Figure 3, where F represents the flushing liquid interface and Q represents the quenching liquid interface.
Mihao
Exhibition Materials Fair
Shaft sleeve
Compensation ring assembly
Non-compensation ring assembly
Auxiliary sealing device|| tt||Figure 1 Single-end mechanical seal flushing interface
Supplementary ring forced piece non-compensating ring assembly
Transfer-assisted close-alignment device
Figure 2 Double-end mechanical seal flushing interface|| tt||Compensation ring assembly
JB/T662993
Non-compensation ring assembly
Transfer auxiliary injection device
Figure.3 Series mechanical seal flushing interface|| tt||6.4 The components and piping of the sealing system should be subjected to a hydraulic test of 1.25 times the working pressure for 15 minutes, and should not be damaged or slippery. 7 Flushing
7.1
The flushing wave of the sealing system can be flushed by the medium itself or other liquids compatible with the medium. 7.2 Flushing has the functions of lubrication, cooling, medium replacement and taking away impurities, 7.3
7. 4
The amount of flushing fluid is determined according to the heat balance calculation principle of the sealing device. The amount of flushing fluid of conventional mechanical seal devices can be determined according to the specifications of the shaft diameter of the seal, see Table 3, Table 3
The amount of flushing fluid of conventional mechanical seal devices
the shaft diameter of the close-fitting part
mm
flushing reduction
L/min
45
3
8 cooling or insulation
>45
~60
4
>60
~85
6
>85
~95
8|| tt||>95
~135
11
>135
~185
15
>185
~235
19
>235
~275
26
>275
~300
34|| tt | Jacket cooling, static ring peripheral cooling, shaft sleeve cooling, external cooler, etc., see Figure 4 and Table 1,
Figure 4 cooling method of sealing system
a - jacket cooling, b - static The outer circumference of the ring is condensed; c-shaft sleeve is condensed; d-emergency 9 impurity removal
9.1 When the density of impurities in the medium is higher than the density of the medium, a hydrocyclone separator or mesh filter can be used to remove impurities . 9.2 When the density of impurities in the medium is lower than the density of the medium, a filter should be used to remove impurities. 5 | | tt | | 6 | This standard is drafted by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Shi Fujiang, Zhang Yuhong, and Liu Yueying.
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