QC/T 288.2-2001 PDF in English
QC/T 288.2-2001 (QC/T288.2-2001, QCT 288.2-2001, QCT288.2-2001)
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Automotive engine cooling water pump test methods
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QC/T 288.2-2001: PDF in English (QCT 288.2-2001) QC/T 288.2-2001
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Automobile engine
cooling water pump test method
ISSUED ON. DECEMBER 30, 2001
IMPLEMENTED ON. MAY 01, 2002
Approved by. China Machinery Industry Association
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Definitions ... 4
4 Test items ... 4
5 Test conditions ... 5
6 Test requirements ... 7
7 Data test and performance parameters calculation ... 8
8 Test report ... 13
Annex A ... 15
Foreword
This Standard is developed to meet the needs of engine cooling water pump industry for
development and facilitate the product supervision and inspection by technical
supervision department.
Annex A of this Standard is informative.
This Standard shall be under the jurisdiction of National Technical Committee of Auto
Standardization.
Drafting organization of this Standard. Dongfeng Motor Pump Co., Ltd.
Main drafter of this Standard. Ren Shengqun.
Automobile engine cooling water pump test method
1 Scope
This Standard specifies the measurement and calculation of test items, test conditions,
test requirements and performance parameters of automobile engine cooling water pump.
This Standard applies to automobile engine cooling water pump (hereinafter referred to as
water pump).
2 Normative references
The following normative documents contain the provisions, which through reference in this
text, constitute the provisions of this Standard. At the time of publication, the editions
indicated were valid. All standards are subject to revision; the parties who enter into
agreements based on this Standard are encouraged to investigate the possibility of
applying the latest editions of the standards indicated below.
GB/T 3214-1991 Methods for measurement of capacity of pump
3 Definitions
This Standard adopts the following definitions.
3.1 Lift H (m). Referring to the energy increment per unit weight when the liquid delivered
by water pump from inlet to outlet.
3.2 Flow Q (L/min) . Referring to the volume of liquid discharged by water pump in unit
time.
3.3 Shaft power P (kW). Referring to the power that water pump requires.
3.4 Net positive suction head NPSH (m). Referring to the affluent flow that is owned by a
unit-weight of water, at water pump inlet and exceeding vapor pressure.
3.5 Water pump failure. It means that the main components of water pump have abnormal
wear and damage, due to which the performances cannot meet specified requirements.
4 Test items
4.1 Exit-factory inspection
Exit-factory inspection items are as follows.
Sealing test.
4.2 Type inspection
Type test items include.
a) Cavitation test;
b) Reliability test;
c) Sealing test;
d) Performance test.
5 Test conditions
5.1 Test media
a) Performance test and cavitation test. Clear water;
b) Reliability test. Cooling liquid that is used by the installed engine;
c) Sealing test. Air.
5.2 Test medium temperature
a) Performance test and cavitation test. Water temperature 80°C ± 2°C;
b) Reliability test. The maximum temperature of cooling liquid when engine works
continuously (90°C ± 2°C when the maximum temperature is unknown);
c) Sealing test. Air temperature is ambient temperature.
5.3 Test bench
a) Performance test may be carried out on open or closed test bench, as shown in
Figure 1 and Figure 2;
5.4.1 Pressure sensor and digital instruments. The precision is not lower than grade 0.5.
5.4.2 Flow. Instrument precision shall not be lower than grade 1.
5.4.3 Revolving speed. Instrument precision shall not be lower than grade 0.2.
5.4.4 Instrument precision shall not be lower than grade 0.5.
5.4.5 Torque. Instrument precision shall not be lower than grade 0.5.
5.5 Performance test shall be carried out under non-cavitation working conditions of water
pump; water tank pressurization may be used to eliminate if cavitation occurs.
6 Test requirements
6.1 Performance test
6.1.1 TEST the water pump flow, shaft power of water pump at different revolving speeds
and shaft power; DRAW the graph of relation among its lift, shaft power, pump efficiency
and flow.
6.1.2 For rated revolving speed of which the range of speed is about 40%~120%, select 4
or more different revolving speeds with the same intervals for test; or select revolving
speeds according to typical working conditions of engine.
6.1.3 Select at least 8 flow points at the same internals from maximum flow value to
minimum stabilization measured value, under each kind of test revolving speed for test.
6.1.4 During data measurement, all instruments shall be read at the same time.
6.2 Cavitation test
Measure the relation among flow, lift and NPSH, within water pump working range; draw
corresponding curve chart.
6.2.1 Test the calibrated flow point or required flow points at rated revolving speed for test.
Measure revolving speed, flow, lift, inlet pressure and water temperature.
6.2.2 During cavitation test, the changes of lift are divided into two stages.
a) The phase that lift H does not change with net positive suction head (NPSH);
b) The phase that lift H dramatically changes with net positive suction head (NPSH), i.e.
fracture stage.
6.2.3 During test for each flow, select at least 10 different net positive suction head (NPSH)
to draw cavitation performance curve. Net positive suction head (NPSH) interval shall be
liquid; its calculation formula is as follows.
Where,
Pu — Output power of water pump, kW;
Q — Flow, L/min.
7.5.2 Calculation formula of water pump efficiency η.
7.6 Determination of NPSH
7.6.1 Calculation formula of NPSH.
Where,
(NPSH) — Net positive suction head, m;
H1 — Inlet gross head, m;
P0 — Atmospheric pressure during test, kPa;
Pv — Vapor pressure of water at test temperature, kPa, see Annex A1.
When inlet pressure is measured through pressure sensor.
Where,
Z1 — Vertical distance from pressure sensor to water pump center, m. When pressure
sensor is higher than pump center, Z1 is a positive value; on the contrary, Z1 is a
negative value;
P1 — Inlet pressure reading, kPa. P1 is a positive value when P1>P0; P1 is a negative
value when P1< P0.
7.6.2 Critical net positive suction head (NPSH) c refers to the NPSH when lift H decreases
by 2% on the performance curve of lift and NPSH.
Annex A
(Standard Annex)
Physical Properties of Water under Standard Atmospheric Pressure
Physical properties of water under standard atmospheric pressure are shown in Table A1.
Table A1 Physical properties of water under standard atmospheric pressure
Temperature
°C
Density
Kg/m3
Vapor pressure
kPa
Temperature
°C
Density
Kg/m3
Vapor pressure
kPa
0 999.8 0.611 31 995.3 4.496
1 999.9 0.656 32 995.0 4.763
2 1 000.0 0.705 33 994.7 5.030
3 1 000.0 0.757 34 994.4 5.323
4 1 000.0 0.812 35 994.0 5.630
5 1 000.0 0.817 36 993.7 5.951
6 999.9 0.934 37 993.3 6.284
7 999.9 0.999 38 993.0 6.631
8 999.8 1.070 39 992.6 7.005
9 999.8 1.145 40 992.2 7.379
10 999.7 1.229 41 991.6 7.791
11 999.6 1.313 42 991.4 8.250
12 999.5 1.403 43 991.0 6.646
13 999.4 1.498 44 990.6 9.112
14 999.3 1.599 45 990.2 9.593
15 999.1 1.706 46 989.8 10.10
16 998.9 1.820 47 988.4 10.62
17 998.8 1.935 48 988.9 11.17
18 998.6 2.068 49 988.5 11.74
19 998.4 2.202 50 988.0 12.34
20 998.2 2.335 51 987.6 12.94
21 998.0 2.482 52 987.1 13.61
22 997.8 2.642 53 986.7 11.29
23 997.5 2.815 54 986.2 14.99
24 997.3 2.989 55 985.7 15.74
25 997.0 3.175 56 985.2 16.50
26 996.8 3.362 57 984.7 17.31
27 996.5 3.563 58 984.2 18.14
28 996.2 3.775 59 983.7 19.02
29 995.9 4.003 60 983.2 19.92
30 995.6 4.242 61 982.7 20.86
Table A1 (continued)
Temperature
°C
Density
Kg/m3
Vapor pressure
kPa
Temperature
°C
Density
Kg/m3
Vapor pressure
kPa
62 982.2 21.84 83 969.9 53.42
63 981.6 22.85 84 969.3 55.57
64 981.1 24.40 85 968.6 57.80
65 980.6 25.01 86 968.0 60.10
66 980.0 26.14 87 967.3 62.49
67 979.5 27.33 88 966.7 64.95
68 978.9 26.56 89 966.0 67.49
69 978.4 29.83 90 965.3 70.11
70 977.8 31.16 91 964.6 72.81
71 977.2 32.53 92 964.0 75.61
72 976.6 33.96 93 963.3 78.49
73 976.0 35.43 94 962.6 81.46
74 975.5 36.96 95 961.9 84.52
75 974.9 38.55 96 961.2 87.69
76 974.3 40.19 97 960.5 90.95
77 973.7 41.89 98 959.8 94.30
78 973.0 43.65 99 959.1 97.76
79 972.4 45.47 100 958.4 101.3
80 971.8 47.36 110 951.0 143.3
81 971.2 49.31 120 943.1 198.5
82 970.5 51.33 130 934.8 270.1
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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