1、 FORD LABORATORY TEST METHOD BJ 001-03 Date Action Revisions 2001 07 23 Revised Editorial no technical change A. Cockman 1992 05 05 Printed copies are uncontrolled Page 1 of 6 Copyright 2001, Ford Global Technologies, Inc. METHOD OF DETERMINING LUBRICATION AND ANTI-WEAR PROPERTIES OF HYDRAULIC FLUID
2、S Application This procedure describes a method of gauging the protection of a petroleum-based hydraulic fluid against corrosion, oxidation and physical wear. For modifications to cover water-oil emulsion and water glycol hydraulic fluids, contact Ford Motor Company, Manufacturing Processes Laborato
3、ry, 24500 Glendale, Redford, MI 48239, Tel. (313) 592-2396. Abstract A test fluid is circulated by a pump of prescribed capacity at a specified pressure, flow and temperature. The magnitude of metallic wear on the interior pre-weighed pump components as determined by weight loss over a given time pe
4、riod is a method of gauging the lubrication and anti-wear properties of the test fluid. Changes in the fluid, as a result of pumping, are a measure of oxidation of the fluid. Changes in pump components, other than by wear, may be a measure of corrosion. Apparatus Required Hydraulic Pump 75 L/minute
5、at 1800 R.P.M. vane type V124-Vickers. Electric Motor 1800 R.P.M., 15 H.P. minimum. Reservoir 95 L capacity, stainless steel elevated above pump. Pressure Relief Valve Adjustable - 0 - 13.8 MPa Flow Meter Heat Exchanger Temperature Sensing and Regulating Device FORD LABORATORY TEST METHOD BJ 001-03
6、Page 2 of 6 Copyright 2001, Ford Global Technologies, Inc. Replaceable Type Filer, Gages and Associated Pipe To assemble a closed loop hydraulic circuit. (See test stand diagram - Figure 1) Analytical Balance Precision of +/- 0.1 mg Materials Required Trichloroethane M5B58A Caution: TLV = 350 ppm -
7、Refer to Industrial Hygiene Bulletin No. 14. Acetone Caution: Low flash point. Refer to Fire Control Bulletin No. 18. Methanol Absolute. Caution: Low flash point. Refer to Fire Control Bulletin No. 18. Test Condition Duration 1000 h continuous or until apparent excessive wear as determined by high n
8、oise level, excessive drive motor current, or low flow dictates termination of test. Pressure 6.9 MPa. Pump R.P.M. 1800 R.P.M, shaft speed, basic less slippage of electric drive motor. Reservoir Capacity 95 L capacity. Fill to be limited to one time pump volume on a per minute basis, i.e. 75 L/min =
9、 75 L reservoir fill. Temperature 66 +/- 1 C initial reservoir. The reservoir oil temperature may increase to 74 C as the 1000 h test termination period approaches. (If the test fluid oxidizes, heat exchange heat transfer may be reduced by oxide deposits.) Conditioning and Test Conditions All test v
10、alues indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. FORD LABORATORY TEST METHOD BJ 001-03 Page 3 of 6 Copyright 2001
11、, Ford Global Technologies, Inc. Preparation of Hydraulic Test Pump Interior Components (Ring and Vanes) Since the test conclusions are based on the weight loss of the test pump ring and vanes after 1000 h operation, it is essential that they are prepared in a prescribed manner for determining their
12、 original weight. 1. Remove burrs or other machined irregularities from ring vanes and bushings with an Arkansas hand stone or equivalent. 2. Verify the hardness of the rings and vanes to be HRC 60-63 (harder or softer materials could provide misleading wear data). 3. Submerge ring vanes and bushing
13、s in trichloroethane and clean components thoroughly with a medium bristle brush to remove all foreign matter. 4. Submerge components individually in a trichloroethane rinse bath, followed by an acetone rinse and finally a methanol rinse. 5. Allow components to completely air dry before determining
14、weight. 6. Weigh ring and vanes set independently on an analytical balance to the nearest 0.0001 g. Note: Bushing weights are not included as part of this test. Preparation of Hydraulic Fluid Test Stand Prior to Scheduled Test 1. Prepare pump for flushing by first immersing a cleaned pump cartridge
15、(ring, vanes, rotor and bushings) designated for flushing into a container filled with fluid to be tested. 2. After flush cartridge is thoroughly saturated, insert it into test pump. Reassemble pump according to manufacturers procedure. 3. Install a 10 micron replaceable pleated paper filter element
16、 into retainer (see diagram). 4. Fill reservoir with 75 L of fluid scheduled for test. 5. Open pump full-flow inlet valve and allow fluid to flow from reservoir to pump inlet. 6. Loosen in-line sight indicator glass located at pump inlet. Fluid will replace entrained air escaping through loose sight
17、 glass opening. Manually rotate pump shaft to draw fluid into the pump inlet before tightening the sight glass. 7. Electrically jog the electrical drive motor until all entrained air is purged from the system. FORD LABORATORY TEST METHOD BJ 001-03 Page 4 of 6 Copyright 2001, Ford Global Technologies
18、, Inc. 8. Start pump and allow system to flush about two h with relief valve set at 2.8 MPa. If the system was previously contaminated by a highly oxidized fluid, a longer flush cycle or second fluid change is required. 9. Drain flush fluid from reservoir and carefully remove all residual fluid from
19、 reservoir that may exist. Remove flush cartridge and 10 micron replaceable filter element. Filters are not used during the 1000 h fluid evaluation process. 1000 Hour Fluid Qualifying Test Procedure 1. Prepare pump for 1000 h qualification test by submerging previously cleaned and weighed interior p
20、ump components (ring, vanes, bushings) in a container filled with fluid to be tested. This procedure ensures the presence of lubrication during initial pump rotation. 2. Assemble pump with fluid saturated components. Examine position of cartridge retainer pin to confirm correct location. Manually ro
21、tate the shaft and observe vanes for freedom of movement in a radial direction. Torque pump end head plate according to the manufacturers assembly procedure. 3. Fill reservoir from drum (through a 10 micron in-depth filter) with 75 L of test fluid. Filtering prevents contaminants existing in fluid s
22、ource from being transferred to the reservoir. 4. Before rotating pump, provide sufficient time to allow air entrained in the reservoir fluid fill to rise to the surface and disperse. 5. Open pump inlet full flow valve and allow fluid to drain from the reservoir to the pump inlet. 6. Loosen in-line
23、sight gage glass located at the pump inlet. Fluid will displace air escaping through loose sight glass opening. Manually rotate pump shaft to draw fluid into pump inlet before securing sight gage glass. 7. Electrically jog the drive motor until all possible residual air has been purged from the syst
24、em. 8. Start pump and allow system to operate about two h with relief valve set pressure of 2.8 MPa. 9. Increase relieve valve set pressure in 1.4 MPa increments at 30 minute intervals until 6 MPa test pressure is attained. As the pressure is increased, a corresponding rise in fluid temperature will
25、 occur. Prior to reaching the fluid test temperature, adjust the heat exchanger control to commence operation. Adjust the heat exchanger control as necessary to maintain specified fluid temperature at set test pressure. 10. Operate system uninterrupted for 1000 h or until operational difficulties di
26、ctate termination of the test. FORD LABORATORY TEST METHOD BJ 001-03 Page 5 of 6 Copyright 2001, Ford Global Technologies, Inc. 11. Approximately one h prior to terminating pump test, remove reservoir cover plate and agitate fluid by stirring to activate oxidized or metallic solids that may have acc
27、umulated throughout the test period. 12. When testing is terminated, deactivate the pump and close the full flow valve, restricting flow from the reservoir. Disassemble pump and remove bushings, rotor, vanes and ring. A 4 litre sample can now be retrieved from the reservoir through the open-ended pu
28、mp housing. This sample is compared with the “as received“ 4 litre sample secured prior to testing. 13. Drain reservoir and record its condition as to accumulation of sludge, metallic or other foreign matter. 14. Examine pump components for evidence of deterioration due to corrosion or erosion. 15.
29、Clean and prepare interior pump components for determination of weight loss according to procedure described in “Preparation of Hydraulic Test Pump Interior Components“. Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities. FORD LABORATORY TEST METHOD BJ 001-03 Page 6 of 6 Copyright 2001, Ford Global Technologies, Inc. METHOD OF DETERMINING LUBRICATION AND ANTI-WEAR PROPERTIES OF HYDRAULIC FLUIDS Test Stand Diagram Figure 1
