1, low carrying capacity Compared with similar oil-lubricated bearings, the bearing capacity of gas-lubricated bearings is about 1 to 2 orders of magnitude lower. According to the bearing capacity per unit area, oil-lubricated bearings are generally (0.5 to 2) MPa, while gas-lubricated bearings are only (0.02 to 0.04) MPa. 2, poor reliability On the one hand, gas-lubricated bearings are prone to destabilization. Commonly there are air hammer vibrations and eddy-action instability. On the other hand, gas-lubricated bearings have stuck, hold shafts, or snapping. 3, the need for high precision manufacturing, costly Because the gas film is very thin, generally between a few micrometers and tens of micrometers, so the requirements for the precision of parts manufacturing are higher, and the cost is increased. In addition, there are special processing requirements such as processing spiral grooves, throttling orifices, and porous materials, which increases manufacturing difficulty and costs. 4, demanding working conditions Gas-lubricated bearings require a clean working environment and strict adherence to operating procedures to ensure that the bearings work properly without accidents. To this end, it has limited its wide application and commercialization. This article by the respirator pump     Organize and publish
Product application:
Perforated Pipe for the reliable drainage of highways,streets,airports,sports grounds,track systems and irrigation systems,in all cases with higher demands for drainage pipes.
Product Specifications:
Diameter mm
SG50
SG63
SG75
SG80
SG110
SG116
SG160
SG200
SG225
Colour
White/black
structure type
Single
Wall
Singles wall
Single wall
single /double wall
Single/double
wall
Single/double
wall
double wall
double wall
double wall
Outer diameter
50
63
75
80
110
116
160
220
245
Inner diameter
41
55
67
80
93
100
143
200
225
Feed water area cm2/m
24
24
24
24
80
80
80
80
80
Local punched Feed water area cm2/m
15
15
15
15
15
15
15
15
15
Length
50.100m/ coil
30m/ coil 6m/ pcs
6m/ pcs
6m/pcs
6m/pcs
6m/pcs
HS
HS:3917320000
NOTE: Special requirements can be customized.
Product features:
adopts wave structure, reduce the weight of pipe, at the same time, improve the stiffness of the tube, and have high hoop stiffness/weight ratio;
the product is lighting flexible, has low friction coefficient,easy to Installation laid and transportation.
Delivery length is convenient to costumed.
has high physical and mechanical property, high pressure, impact resistance, heat resistance, and corrosion resistance.
The main technical indexes:
vertical condensation to 40% of the outer diameter, immediately unloading, sample is not rupture or layered
temperature At 0 ℃, the height of 1 M conditions, for 1 Kg weight hammer, impact 10 times, should be OK more than nine times;
uniform and smooth inner-wall ,through hole localed lower than 1/2 of The height of the troughs, the number of through hole which higher than 1/2 of The height of the troughs is less than 10% of the total;
permeable area ≥15cm2/M ;
longitudinal retraction rate ≤3.0%;
bending degree %≤2;
ring stiffness≥4KN/㎡ .6.3KN/㎡.8KN/㎡
HDPE/UPVC Permeable Corrugated Pipe UPVC Permeable Corrugated Pipe,HDPE Permeable Corrugated Pipe,PVC Permeable Corrugated Pipe ZHEJIANG BOYA COMTECH CO.,LTD , https://www.zjbytx.com