JB/T 8814-1998 JB/T 8814-1998 Technical requirements for water-cooled hydraulic oil coolers for high-power bulldozers JB/T8814-1998 Standard download decompression password: www.bzxz.net

TCS 53. 100
Machinery Industry Standard of the People's Republic of China
JB/T 8814—1998
Big power bulldozer-Water-cooled 1ypehydraulic fluid cooler--Technical specifications1998-09-30Promulgated
National Machinery Industry Standard
1998-12-01Implementation
JB/T88141998
This standard was proposed by the Machinery Standardization Technical Committee of the Ministry of Machinery Industry. The drafting units of this standard are the Tianlu Shangcheng Machinery Research Institute of the Ministry of Machinery Industry and the Shangjiang Nicheng Tongyue Factory. The main drafters of this standard are Yang Qiudao and Huang Jinshen. 1 Scope
Machinery Industry Standard of the People's Republic of China
High-power bulldozer
Water-cooled hydraulic oil cooler technical specifications JB/T8814—1$98
This standard specifies the technical requirements, test methods and inspection specifications for water-cooled hydraulic oil coolers for high-power bulldozers. This standard applies to hydraulic oil coolers (hereinafter referred to as coolers) for bulldozers above 235kW, and other engineering machinery oil coolers can also be used.
2 Referenced Standards
The documents included in the following standards are cited in this standard as the original documents of this standard. When the standard is published, the versions indicated are valid. All standards are subject to revision. The parties using this standard should discuss the applicability of the latest versions of the following standards. GR2828-B7
GR6807-86
JB/T15661S97
JB/T509591
JB/T 6943-91
JB f003-92
3 Technical requirements
Batch inspection counting sampling procedures and sampling tables (applicable to the inspection of subsequent batches) Technical conditions for phosphating treatment of steel workpieces before painting Pre-belt thruster test method
Internal combustion engine oil cooler heat transfer performance test method General technical requirements for engineering machinery welded parts
Internal combustion engine plate fin type oil cooler core production technical conditions 3.1 The cooler shall be manufactured in accordance with the national samples and technical documents approved through the prescribed procedures and comply with the provisions of this standard. 3.2 The heat exchange performance of the cooler shall comply with the provisions of Table 1. c)
3.3 After the seal performance test specified in 4.2, the welded joints shall not have any seam phenomenon under the pressure of water and water. 3.4 The material of the cooler shell shall be corrosion resistant and phosphating treated. The quality requirements after phosphating shall meet the requirements of ISO B6807.
3.5 In addition to meeting the requirements of 3.1, the heat transfer quality of the cooler shall also meet the requirements of JT/T5943. 3.6 The weight of impurities discharged from the cooler shall meet the following formula W-7110F
National Machinery Industry Requirement 1998·0930 Approved 1998-12-01 Implementation Date
In the formula, W
is the mass of the heat exchanger, m, K
is the heat transfer area, m. www.bzxz.net
JB/I8814—1998
3.7 After the cooler has been tested as specified in 4.4, it is not allowed to leak oil, break, fall off, etc., and all parts should not be deformed, loose or damaged.
3.8 The cooler core should comply with the requirements of B6003. 3.9 The outer and inner surfaces of the cooler should be painted and baked. The paint should be uniform in color and free of defects such as bleaching, sludge, looseness, and blistering. 3.10 The cooling outlet and the water supply and outlet should be strictly sealed to prevent the inner cavity of the cooling part from being contaminated. 3.11 Under normal working conditions, the service life of the cooling duct shall not exceed 6000h. 4 Test methods
4.1 Heat transfer performance
The heat transfer coefficient of the cooler shall be determined by the acid pressure test method specified in 5095 and Table 1. 4.2 Sealing performance
On the sealing test bench, a 2.0MP pressure tank and 1.0MPa pressure water are respectively introduced into the oil side and water side of the cooler, and the pressure is maintained for 2 minutes. The pressure drop value is not greater than C.01MPa. 4.3 Cleanliness test
The cleanliness of the cooler sleeve side shall be determined in accordance with the provisions of JB6003. 4.4 Vibration test
4.4.1 Vibration mode
The cooler is installed on the vibration test load, and the vertical, horizontal, front and back directions are given harmonic vibration in turn. 4.4.2 Test for common alarm rate
Find the common alarm rate of the detector according to the provisions of Table 2. During the test, the trigger frequency increases from small to large at a certain ratio to the maximum, and then decreases from large to small at the same ratio until the minimum trigger rate is reached. Table 2
Trigger frequency
8. 3 ~ 56, 7
44.3 Test without common alarm rate
If there is no common alarm rate, it should be carried out according to the provisions of Table 3. 4.4.4 Total frequency test Full frame Shaking time Dynamic acceleration If there is a vibration frequency, then according to the measured non-vibration frequency, select a short amplitude between the two broken lines given in Figure 1, and carry out a vibration test for 2.5 hours in the up and down directions, 2.5 hours in the left and right directions and 2.5 hours in the front and rear directions respectively, and then calibrate the current wear in Table 4 for vibration test. 2 Disassemble the vibration camera 4.5 Full body inspection Vibration amplitude J/T BB14—1998 5. 5 67 3.3
5055.F2s.3165.
Operation time
4.5.1 Visually inspect the corrosion treatment of the cooler shell, and its quality shall comply with the provisions of 3.4. Visually inspect the welding of the cooler body, and its quality shall comply with the provisions of 5. 45.2
.5.3 Visually inspect the anti-pollution measures of the cooler. 4.6 Surface quality
Visually inspect the surface quality of the cooler, and its quality shall comply with the provisions of 3.9. 4.7
Service life
The service life test of the cooler shall be carried out along with the site test of the excavator. 5 Inspection rules
5.1 Factory inspection
Acceleration
Each cooler shall be inspected and qualified by the manufacturer's inspection department before it can be shipped out of the factory. The factory inspection items include basic dimensions, tightness performance and surface quality.
5.2 Type inspection
5.2.1 The items for cooler type inspection shall be in accordance with the provisions of Table 5, and the inspection shall be in accordance with the provisions of GB282. A single sampling plan is adopted, and the general inspection batch is 26~50. The qualified quality list and inspection level shall be in accordance with the provisions of Table 5 or determined by negotiation between the supply and demand parties. 5.2.2 If the number of unqualified items in the inspection is equal to or less than the corresponding qualified number, the batch of products shall be accepted, otherwise it shall be rejected. Table 5
6 Marking, packaging, transportation and storage
Determination of rottenness
Secrecy
Safety
Resistance
Transmission performance
Material resistance
Inner cavity anti-pollution
Good use
Overall dimensions
Surface quality
Welding quality
The name of the manufacturer and the product model shall be marked on each cooler. Each cooler shall be packed with plastic ether and then packed into a wooden box. The surface of the wooden box should be marked with: 6.2
) Name, address and postal code of the receiving bill: b) Product name, specification, quantity;
e? Total quantity of the packing box:
d) "Handle with care" and "Positive pressure" and other signs! 6) Name, address and postal code of the shipping unit: {Delivery date.
6.3 The documents accompanying the packing should include the product factory certificate and product manual, and
6.4 The packed cooler should be placed in a ventilated and dry warehouse. After one year from the date of storage at the manufacturer, the cooler should still comply with the provisions of this standard.
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