JB/T 8577-1997Internal combustion engines - Water radiators - Technical specifications (English PDF)

3.1 Water passage area

The cross-sectional area of the passage when water flows through the inside of the frequency of 20 Hz, 30 Hz, 40 Hz, 50 Hz for 3 hours each, for a total of 12 hours. The vibration direction is vertical up and down. After 12 hours of vibration, the radiator is not allowed to leak or have parts damaged.

4.4 Pressure alternating cycle resistance

The radiator cavity is subjected to an alternating pressure from below 25 kPa to 150 kPa, at a pressure alternating cycle of 1 s ~ 6 s. After 3×104 pressure cycles, the radiator is not allowed to have leakage, desoldering, permanent deformation.

4.5 Heat shock resistance

The inlet temperature difference of the radiator is 85 °C ± 2 °C. After 3×103 cold-hot alternating cycles, the radiator is not allowed to have leakage and part damage.

4.6 Static pressure strength

Apply static pressure of 250 kPa to the radiator cavity for 3 min. The radiator is not allowed to have leakage and permanent deformation.

4.7 Torsional vibration resistance

One side of the radiator is subjected to synchronous reverse motion at both ends, at a frequency of 6 Hz and a torsion angle of ±22.5'. At the same time, circulate hot water at 90 °C ± 5 °C inside the radiator. After 5×105 torsional vibrations, the radiator is not allowed to have mechanical damage such as cracks, desoldering, water leakage. After the test, it shall meet the sealing performance requirements specified in 4.2.2.

4.8 External corrosion resistance

After 200 h of neutral salt spray corrosion, the radiator shall not have any coating peeling phenomenon. After the test, it shall meet the sealing performance requirements specified in 4.2.2.

4.9 Internal corrosion resistance (applicable to aluminum radiators)

A special OY solution is passed into the radiator. After 7 cycles, the radiator is not allowed to leak.

4.10 Comprehensive performance

4.10.1 Heat dissipation

The heat dissipation of the radiator shall comply with the provisions of the product drawing or supply agreement.

4.10.2 Resistance

The air resistance and internal resistance of the radiator shall comply with the provisions of the product drawing or supply agreement.

4.11 Working performance of compound water inlet cover

The opening pressure of the air inlet valve and steam outlet valve of the radiator's compound water inlet cover shall comply with the provisions of the product drawing.

4.12 Assembly and matching dimensions

The assembly dimensions of the radiator and the main machine, as well as the matching dimensions of the water inlet and the water inlet cover shall comply with the requirements of the product drawings.

4.13 Manufacturing and appearance

4.13.1

The length difference between the two diagonals of the radiator core shall comply with the following requirements:

a) When the core diagonal length is not greater than 800 mm, the diagonal length difference shall not be greater than 3 mm;

b) When the diagonal length is greater than 800 mm, the diagonal length difference shall not be greater than 5 mm.

4.13.2

The total number of fins of the tube-fin radiator shall comply with the requirements of the drawing; its limit deviation is ±1% of the total number of fins specified in the drawing. The number of wave peaks of each heat dissipation belt of the tube-belt radiator shall comply with the requirements of the drawing; its limit deviation is ±2.

4.13.3

The maximum deviation of the fin spacing of the tube-fin radiator is ±0.2 mm;

the two fins shall not be pressed together. The maximum deviation of the wave peak spacing of the tube-belt radiator is ±0.5 mm.

4.13.4

The fins (belts) on the two sides of the radiator shall not curl, fall over, or have broken edges; the difference between them shall not exceed 1 mm.

4.13.5

There shall be no floating solid residue inside the radiator.

4.13.6

There shall be no obvious solder accumulation on all welds of the radiator.

4.13.7

The anti-corrosion layer on the surface of the radiator shall be uniform and beautiful; there shall be no coating shedding.

4.13.8

The number of blocked heat dissipation pipes in the radiator shall not exceed 1% of the total number of heat dissipation pipes.

5.7 Comprehensive performance

5.7.1 Test conditions

The test conditions for the comprehensive performance test of the radiator are as follows:

a) The test piece for the comprehensive performance test of the radiator is the finished radiator;

b) The test water must be clean and must not contain sand, rust or other debris;

c) The test device shall comply with the provisions of JB/T 11798.

5.7.2 Test method

5.7.2.1 Preparation before test

Preparation shall be carried out according to the following requirements before the test:

a) After the radiator is installed on the test bench, first check the water circuit and the connection between the test piece and the wind tunnel. The circuit shall be unobstructed and leak-free;

b) Before the test, turn on the heating device, water pump, fan; adjust the air flow and water flow. When the inlet water temperature reaches the specified value, remove the gas in the water circuit. The test can only be carried out after the working conditions are stable.

5.7.2.2 Test specification

The test specification requirements for the comprehensive performance test of the radiator are as follows:

a) The test medium is air and clean water;

b) The inlet temperature during the test is the atmospheric temperature; the temperature fluctuation shall not exceed ± 2 °C; the total liquid-air temperature difference is 60 °C ± 1 °C;

c) The test water flow rate shall be in accordance with the provisions of the product drawing;

d) The test air volume shall be 6 ~ 8 operating points (including assessment points) within the range of 30% ~ 120% of the rated air flow rate.

5.7.2.3 Test procedure

in the contract.

6.2

When conducting the inspection of the items specified in 4.3 ~ 4.9, it is not required to be conducted on the same test sample.

6.3

The identification of new radiators, the type modification of old products, the localization of products imported from abroad shall all be subject to type tests; type tests shall include all inspection items specified in 4.1 ~ 4.13.

6.4

Products must be inspected and qualified by the quality inspection department of the manufacturer before they can leave factory; the exit-factory inspection shall include the inspection of the items specified in 4.2, 4.12, 4.13.1 ~ 4.13.7.

6.5

When the purchaser conducts random inspections on product quality, random inspections shall be conducted in accordance with the provisions of GB/T 2828.1. The inspection items, group-batching principles, sampling schemes, judgments and re- inspection rules shall be implemented in accordance with the provisions of the technical documents, which are agreed upon by the manufacturer and the customer.

7.1 Marking

7.1.1

Each product shall be marked with:

a) Manufacturer's name or trademark;

b) Product model and name;

c) Exit-factory date or exit-factory number;

d) The radiator's water inlet cover shall have a conspicuous warning sign of "Open with caution, beware of burns".

7.1.2

The certificate shall indicate:

a) Manufacturer's name or factory logo;

b) Product name and model;

c) Exit-factory date or exit-factory number.

7.1.3

The outer surface of the packaging box shall indicate:

a) Manufacturer's name and address;

b) Product name and model;

c) Quantity and total mass of the packaging box;

d) Signs of "Handle with care" and "Avoid pressure";

e) Overall dimensions;

f) Exit-factory date.

7.2 Packaging

7.2.1

The water inlet and outlet of each radiator shall be covered, to prevent debris from entering the radiator.

7.2.2

The packaging of the radiator shall ensure that the product is not damaged during transportation and storage.

7.2.3

The packaging box shall be accompanied by a product certificate, which is signed and chopped by the manufacturer's quality inspector.

7.3 Transportation

The packaged radiator shall be allowed to be transported by any normal method.

7.4 Storage

The radiator shall be stored in a ventilated, dry, corrosion-free warehouse. Under normal storage conditions, the manufacturer shall ensure that the product will not rust within 12 months from the date of leaving the factory.

7.5 Others

Marking, packaging, transportation, storage can also be agreed upon by the supplier and the buyer.

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