URAL ENGINEERING CENTER
Ural Engineering CenterHome Contacts Sitemap rus | eng
Loading

Test stand for pumps and hydraulic motors of road-building machines


The stand is used for testing pumps and hydraulic motors of road-building machines after routine and capital repair. The stand checks pumps functioning per GOST 14658-86 and hydraulic motors functioning per GOST 20719-83 to the extent as specified by the statement of work approved by the Customer.

The stand allows checking pumps and hydraulic motors functioning (brand marks of equipment tested and test conditions are given in the tables below).

Pumps are tested for:

  • excessive vibration, shock, knocking, sharp noise, line pressure surge, excessive heating                                     
  • drop formation along the covers, plugs, flanges, joints, etc.
  • amount of working fluid supply and its consistency at the given direction of output shaft rotation
  • change of working fluid supply amount during control mechanisms operation
  • response to load change (output pressure

Hydraulic motors are tested for:

  • excessive vibration, shock, knocking, sharp noise, line pressure surge, excessive heating, conditions of working fluid outlet from the drain pipe (uniformity, air bubbles, etc.)
  • working fluid leaks from plugs, flanges, shaft, etc. 
  • rotation of hydraulic motor output element during working fluid supply to working cavities
  • change of rotation of hydraulic motor output element when changing working fluid supply to the working cavities

Pumps brand marks and test conditions:

Pump
test, MPa


Qtest, l/min


n
test, rev/min

Ntest, kW
333.355.100.220
20
168
1,500
56
NSh-100-3L
16
135
1,500
36
NSh-71-3L
20
105
1,500
35
NSh-50 U-2
16
73
1,500
20
NSh-50
14
73
1,500
17
74860276
6.5…7.3
86
1,500
10
2909124SL
1
45
1,500
0.75
NSh-10P-3
16
13
1,500
3.5
 

Hydraulic motors brand marks and test conditions:

Hydraulic motors
test, MPa
Qtest, l/min
ntest, rev/min
 
Ntest, kW
310.3.56.00
20
2.8…100
50…1,800
30
310.2.56.00
20
2.8…100
50…1,800
30
310.3.112.00
20
5.6…201
50…1,800
60
303.3.112.501
20
5.6…201
50…1,800
60
303.3.112.501.002
20
5.6…201
50…1,800
60
MN-250
16
12.5…250
50…1,000
60
 
Specifications:

Stand performance
No less than 3 standard-size hydraulic units per 8 hours
Total consumed power, kW
60.5
Ambient temperature, º
10…25
Water temperature at the heat exchanger inlet, º
0…30
Working fluid viscosity, cSt
10…30
Reservoir volume, m3
1.2
Stand dimensions (WxLxH), mm
2,000x4,500x2,000
 

Apart from the hydraulic units specified above, the stand can be used to test any hydraulic units which fit stand capacities. Cheltec is able to design and manufacture any necessary adapters.