JB/T 5288.2-1991 Method for determination of cleanliness of cycloid pinwheel reducer

This standard specifies the method for determining the cleanliness of cycloid pinwheel reducers and the determination of test results. This standard applies to lubricated double-shaft reducers with one, two and three transmission stages. JB/T 5288.2-1991 Method for determining the cleanliness of cycloid pinwheel reducers JB/T5288.2-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Cycloidal Pinwheel Reducer
Cleanliness Determination Method
1 Subject Content and Scope of Application
JB/T5288.2-91
This standard specifies the cleanliness determination method of cycloidal pinwheel reducer (hereinafter referred to as reducer) and the judgment of test results. This standard is applicable to double-shaft reducers with lubricating oil lubrication for primary, secondary and tertiary transmission. 2 Reference standards
GB1922
Solvent oil
3 Measuring instruments and cleaning liquid
3.1 Instruments
Filter screen: 120 mesh/inch, 200 mesh/inch, filter paper; various sizes of nylon round brushes, flat brushes, etc., containers with lids of different sizes;
Analytical balance with a sensitivity of 1/dry;bZxz.net
Oven, working temperature is 105±5℃;
Dry coal box.
3.2 Cleaning liquid
It is recommended to use NY-120 solvent oil (GB1922), gasoline or acetone. 4 Measurement method
4.1 Preparation
4.1.1 The determination of cleanliness should be carried out in a clean, well-ventilated room with safety measures. 4.1.2
Operators should be neatly dressed.
For the reducer to be tested, non-measurement parts should be cleaned first. 4. 1.4
All sampling tools and containers should be cleaned. Filter the cleaning liquid with a 200 mesh/inch filter or filter paper. 4.1.6 Soak the 120 mesh/inch filter in the filtered cleaning liquid for 10 minutes and then take it out. After the cleaning liquid evaporates, put it in an oven at 105±5℃ to dry. After 30 minutes, take it out and put it in a drying oven to cool to room temperature. Take it out and weigh it, and record the weight of the filter as G1. 4.2 Operation steps
4.2.1 Disassemble all detachable parts of the reducer, and use a brush and filtered cleaning liquid to repeatedly clean the inner wall, inner hole and surface of the inner cavity of the casing and all parts in the cavity one by one.
4.2.2 During the cleaning process, splashing and overflow of the cleaning liquid with impurities should be prevented, and all cleaning liquid should be collected. 4.2.3 Filter the collected cleaning liquid with a cleaned 120 mesh/inch filter. Approved by the Ministry of Machinery and Electronics Industry on January 1, 1991 and implemented on July 1, 1991
JB/T 5288.2-91
4.2.4 Dry the filter together with the impurities in an oven at 105±5°C, take it out after 60 minutes, put it in a drying oven to cool to room temperature, take it out and weigh it, and record the weight of the filter together with the impurities as G2.5
Calculation of impurities (cleanliness)
The weight of impurities is calculated as follows:
Where: G is the weight of impurities.mg:
G,---the weight of the filter before filtration, ng;
Gz—the weight of the filter together with the impurities after filtration, mg. Determination of test results
The determination of test results is based on the model of reducer as the evaluation parameter. The determination of cleanliness of reducers for primary, secondary and tertiary transmission is shown in Table 1, Table 2 and Table 3.
Determination level
Determination level
The cleanliness of primary transmission reducer
shall comply with the provisions of the national standard "Cycloidal Pinwheel Reducer" 200
Determination level
The cleanliness of secondary transmission reducer
Impurities
shall comply with the provisions of the national standard "Cycloidal Pinwheel Reducer" 765
The cleanliness of tertiary transmission reducer
shall comply with the provisions of the national standard "Cycloidal Pinwheel Reducer" 1610
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