JB/T 6406.2-1992 Technical specifications for electro-hydraulic block brakes
Some standard content:
Machinery Industry Standard of the People's Republic of China
Electric Hydraulic Block Brake
1 Subject Content and Scope of Application
Technical Conditions,
JB 6406.2--92
This standard specifies the technical requirements, test methods and inspection rules for electric hydraulic block brakes (hereinafter referred to as brakes). This standard is applicable to normally closed block brakes with electric hydraulic pushers (hereinafter referred to as pushers) as the driving device. . 2 Reference standards
GB699 High-quality carbon structural steel technical conditions
GB 700
Carbon structural steel
Basic technical requirements for rotating electrical machines
GB755|| tt||Spring steel
GB1222
Hot rolled cylindrical coil spring technical conditions
GR1239.4
GB 4942.1
GB 6332.2
GB6332.3
GB8923
GB9286
GB9439
Motor housing protection classification
Block brake brake block
Block brake Brake linings
Cross-hatch test of paint and varnish films for corrosion and rust removal levels on steel surfaces before painting
Gray iron castings
GB/T 13384||tt ||JB/T6406.1
JB/T 6406.3
3 terms
Electromechanical products: general technical conditions for product packaging
Electric hydraulic block brake type, basic parameters and size electro-hydraulic block brake pusher
3.1 brake release brake release The brake covering of the brake breaks away from the surface of the brake wheel and eliminates the braking torque. 3.2 Brake closing brake selting is the process in which the braking surface of the brake is in contact with the surface of the brake wheel to establish the specified braking torque. 3.3 Rated load rated load
The working force of the brake spring when the brake generates the rated braking torque. 3.4 The working stroke of the pusher is the distance the pusher push rod moves during the brake release process. 3.5 block setback distance shoclcaranc center
The distance between the busbar in the middle of the tile brake covering and the surface of the brake wheel when the brake is released. 3.6 Pad positioning shocs aligning
Through some device or taking some measures, when the brake is closed, the brake covering surface of the pads and the surface of the brake wheel are in normal fit, and the pads are in the normal release state No part of the brake cover is in contact with the surface of the brake wheel. The Ministry of Mechanical and Electronics Industry of the People's Republic of China approved the implementation on July 14, 1993 on July 1, 1993
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3.7 Static test
statlc tes
A test to evaluate the structural function and action performance of the brake. Its main feature is that there is no need to use power to drive the brake wheel during the test.
3.8 Dynamic test dynamic testbzxZ.net
A test to evaluate the dynamic braking torque and other dynamic performance of the brake. Its main feature is that during the test, power is needed to drive the brake wheel.
4 Technical requirements
4.1 Working conditions
4.1.1 The power supply of the brake is generally three-phase AC, with a rated frequency of 50Hz and a rated voltage of 380V. The allowable voltage fluctuation is: the upper limit is not exceeds 10% of the rated voltage, and the lower limit (at peak current) does not exceed -15% of the rated voltage. 4.1.2. The working system of the pusher in the brake is divided into two types: S1 (continuous) working system and S3 (intermittent periodic) working system. The load endurance rates of S3 during working hours are 40% and 60%.
4.1.3 The altitude of the place where the brake is used shall not exceed 2000m (when it exceeds 1000m, the ambient temperature shall be converted according to the relevant provisions of GB755).
4.1.4 When the brake is in normal use, the suitable ambient temperature is -25~+40℃. The average temperature within 24 hours shall not exceed +35C. 4.1.5 The average maximum relative humidity in the wettest month where the brake is used It shall not exceed 90%, and at the same time, the average minimum temperature of the month shall not be higher than +25℃
4.1.6 There shall be no flammable, explosive and corrosive gases in the working environment around the brake. 4.1.7 The brake base is installed horizontally.
4.2 Structural requirements
4.2,1 The fixing method of the brake pad should comply with the regulations of GB6332.2 and GB6332.3. When assembly and riveting are used, it must be ensured that the effective wear thickness of the brake lining is not less than 50% of the original thickness. 4.2.2 The brake should be equipped with back distance and torque adjustment devices, and have reliable anti-loosening measures. When the working force of the brake spring is greater than 3000N, the brake spring should be equipped with a maintenance positioning device. Note: The maintenance positioning device refers to when the brake needs to be released freely during maintenance (the spring does not exert force and the pusher does not work) or when it is partially disassembled. , a device that positions the brake spring at its working length.
4.2.3 All hinge points with relative swings on the brake (except the hinge points connected to the pusher) should be equipped with anti-friction bearings (axle sleeves), and the coupling and coordination of the bearings should comply with the relevant standards. The mating surfaces of each hinge point should be coated with grease before leaving the factory. 4.2.4 The brake pads of the brake should be able to follow the position. 4.2.5 The brake should be equipped with a reliable back distance equalization device to ensure that the back distance on both sides is basically equal when the brake is released normally. No part of the pad brake covering shall float on the brake wheel. 4.2.6 When the brake is operating at the maximum allowable pad retraction, the working stroke of the pusher shall not exceed 90% of the rated stroke of the pusher. 4.2.7 The shell protection level of the electrical part of the brake (motor junction box) is not lower than IP44 specified in GB4942.1. 4.3 Performance requirements
4.3.1 The action performance of the brake shall comply with the following provisions: a, at rated load When operating at 50% rated load and 85% of the rated voltage, it should be able to flexibly release; when operating at 50% of the rated load and rated voltage and at the rated operating frequency of the thruster, it should be able to flexibly close b.
4.3.2 Brake The braking torque performance of Braking torque (i.e. any one of the three in Table 1 of JB/T6406.1);
The braking torque of the central brake under the rated load condition shall not be less than the provided rating; 108||tt ||JB 6406. 2 -.92
d. The brake should allow the braking torque to be adjusted within the range of (0.7 to 1) times the rated value. 3. The pusher should comply with the relevant provisions of JB/T6406.3. 4.3.3 | Within the specified temperature range, the kinetic friction coefficient should have a certain relative stability, and the maximum value generally does not exceed 1.5 times the minimum value.
4.4 Brake spring
The brake spring should comply with the regulations of GB1239.4. 4.5 Materials and heat treatment
4.5.1 Brake pads shall be made of materials with mechanical properties not lower than GB9439 and HT200. 4.5.2 The brake spring should be made of materials with mechanical properties not lower than 60Si2Mn in GB1222. 4.5.3 The mechanical properties of each hinge axis of the brake are not lower than those of 45 steel in GB699, and the heat treatment hardness is 33~38HRC. 4.5.4 The remaining components of the brake shall be made of materials whose mechanical properties are not lower than Q235-B in GB700. 4.6 Accuracy requirements
4.6.1 When the brake is closed under rated load, the fitting area of ??the brake pad and the brake wheel should not be less than the design area for pressed hard or semi-hard pads 50%; for soft pads, it should not be less than 70% of the design area. 4.6.2 The assembly gap between the outer arc surface of the brake pad and the inner arc surface of the brake shoe should not be greater than 0.5mm at any place. 4.7 Surface quality requirements
4.7.1 The surfaces of the brake rods, spring rods, brake springs and all fasteners of the brake should be rust-proofed and should comply with the relevant standards,
4.7.2 The remaining components of the brake should be surface-coated (except the mating surface) and meet the following requirements: a.Surface rust removal should be carried out before painting, and the rust removal level should reach the Sa2 or St3 level specified in GB8923; b. The painting surface should be coated with at least one layer of anti-rust primer and two layers of topcoat, and the total dry film thickness of the paint should not be small Tin 75lm; the paint film adhesion should comply with the secondary quality requirements specified in GB9286; c.
d. The painted surface should be uniform, meticulous, bright and consistent in color, and there should be no missing paint, wrinkles, pinholes or serious sagging. Note: When using other coating methods, the effect shall not be lower than the above. 5 Test methods
5.1 Test requirements
5.1.1 The measuring tools and measuring instruments used in the test should comply with the relevant national metrology verification regulations. 5.1.2 The environment and conditions of the test shall comply with the provisions of Articles 4.1.4~4.1.7. 3 When a brake of one specification has more than one rated braking torque, the product to be tested should be the 5.1.3
type with the largest rating.
5.1.4 The test bench used for dynamic testing should be approved by the superior (responsible) department. 5.2 Structural inspection
5.2.1 Use visual inspection to check the fixation of the brake lining, and use a general measuring tool to check the effective wear thickness of the brake lining. 5.2.2 Use visual inspection methods to check the brake's back distance, torque adjustment device, maintenance positioning device and anti-loosening measures, and operate according to the product instruction manual to verify its effectiveness. When equipped with an automatic compensation device for back distance and torque, the brake should be subjected to a static action test on the test bench to verify its effectiveness. The operating frequency and number of action tests depend on the actual situation of the product. 5.2.3 Use visual inspection method to check the lubrication condition of the brake. 5.2.4 The brake pad positioning, equal retreat distance and the pusher working stroke test are carried out on the test bench in the form of static action test. The specific steps and methods are as follows:
a, install the brake according to the drawing requirements or product instructions, and adjust the brake within the specified back distance range and rated load status
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b． Operate the brake intermittently for no less than 5 times, and use visual inspection to check the tiles' positioning and the equalization of the retraction distance; after the inspection of the tiles' positioning and retraction equality is completed, readjust the brake to the specified maximum retraction state. , operate the brake intermittently for more than 5 times and then cut off the power, so that the brake is in a closed state, and use a general measuring tool to measure the working stroke of the pusher. 5.2.5 The electrical enclosure protection test shall be carried out in accordance with the provisions of GB4942.1. 5.3 Performance test
5.3.1 Brake action performance test is carried out on the test bench in the form of static test. The specific steps and methods are as follows: adjust the brake within the specified retraction range and rated load status, reduce the pusher voltage to 85% of the rated value, operate the brake intermittently for more than 20 times, and use visual inspection Method to check the flexibility of its release; b. Adjust the brake within the specified back distance range and 50% rated load state. The pusher voltage is the rated value. According to the rated operating frequency of the pusher, operate the brake more than 20 times. Visually inspect the closure for flexibility. 5.3.2 The braking torque test is carried out on the test bench. The mode is dynamic test. The same test product and the same parameters are measured more than 5 times, and the average value is taken as the test result (the test principle, before there is no unified regulation, can be determined by the product. To be determined by the manufacturer). 5.3.3 The pusher thrust test is conducted on a separate test bench. The method is: apply the corresponding weight or other equivalent load on the vertically installed thruster, and conduct the maximum thrust and thrust tests at reduced pressure respectively. Each test should be conducted more than 5 times, and each test should comply with 4.3.3 Article requirements.
Note: This article can also be carried out in accordance with the relevant provisions of JB/T6406.3. 5.3.4 The dynamic friction performance test of the brake pad is carried out on the test bench in the form of dynamic test. In the absence of unified regulations, the test principles and data processing methods can be determined by the product manufacturer, but they must be approved by the superior (responsible) department. 5.4 Brake spring
The test of brake spring shall be carried out in accordance with the regulations of GB1239.4. 5.5 Accuracy Inspection
5.5.1 The bonding area is visually inspected using the coloring method. 5.5.2 The assembly gap between the brake pad and the brake pad should be checked with a feeler gauge. 5.6 Surface quality inspection
5.6.1 The rust removal treatment of each brake component before painting shall be inspected in accordance with the regulations of GB8923. 5.6.2 The paint film adhesion is inspected according to the method specified in GB9286. 5.6.3 The surface quality and surface anti-rust treatment after painting are inspected by visual inspection. 6 Inspection Rules
6.1 Outgoing inspection
6.1.1 Each product must undergo factory inspection by the quality inspection department in accordance with the provisions of this standard. Only after passing the test can it leave the factory and be accompanied by a product certificate.
6.1.2
a.
h.
e.
The inspection items are as follows:
Important connection dimensions (JB/ hl, table, in Table 1 of T6406.1: Brake lubrication (Article 4.2.3);
Operating performance at 85% rated voltage (Article 4.3.1a); Brake pads and brakes Assembly clearance of gasket (Article 4.6.2); surface rust prevention (Article 4.7.1);
f.
Surface quality after painting (Article 4.7.2d). 3. If any of the inspected products fails, the product will be deemed unqualified. 6.1.3
6.2 Type inspection
6.2.1 Type inspection shall be carried out when the following circumstances occur: a. When new products are finalized or old products are transferred to production for trial production and appraisal; 11)
JB 6406.2-92
After the product is officially produced, there are major changes in design and process that may affect product performance; h.|| tt||When the product is resumed after a long-term suspension of production for less than 2 years; d.
When the national quality supervision agency proposes type inspection requirements; e. When the product is in normal production, type inspection should be conducted every 2 years. 6.2.2 Type inspection adopts the following sampling method: The type inspection sampling method for the two cases a and b in Article 6.2.1 is: among trial products, one specification is selected for each wheel diameter. Sampling two products of a.
specification:
b, the type inspection sampling method for the two situations c and e in 6.2.1 is: among the products produced, according to the wheel diameter In order, one specification will be selected from each two wheel diameters, at least 3 specifications will be selected from each series, and at least 2 products will be selected from each specification; the type inspection sampling method for case d in Article 6.2.1 shall be determined by the relevant departments themselves Confirm, c.
6.2.3 inspection items are as follows:
basic dimensions (see Table 1 in JB/T6406.1); b.
c
e.
f.
g.
h.
i.
structural requirements (each item in 4.2);
action performance ( 4.3.1);
braking torque (c in 4.3.2);
propeller thrust performance (4.3.3);
friction performance (4.3.4 Articles),
accuracy requirements (each item in 4.6);
surface rust prevention (Article 4.7.1);
surface coating (Article 4.7.2).
6.2.4
The judgment rules for type inspection are as follows:
a.
All inspection items of the inspected products of various specifications should be qualified. If there are unqualified items, it is allowed to double-sample products of the same batch and specifications to re-inspect all items. If there are still unqualified items, the products of all specifications of the wheel diameter will be judged to be unqualified: For Article 6.2.1 For type inspection in the three situations c, d, and e, all the inspection items of the sampled products should be qualified. If there are unqualified items, products containing unqualified items are allowed to be re-sampled from the same batch and specifications of products for re-inspection of all items. If there are still unqualified items, the product will be deemed The batch of products failed. 7. Logo, packaging, transportation and storage
7.1 Logo
The brake should be equipped with a product sign in a conspicuous position, and the following content should be marked: product name;
a.
b. Product model:
Rated braking torque:
c.
d． Machine weight;
e. Manufacturing date or factory number;
f, manufacturing name.
7.2 Packaging
7.2.1 All products leaving the factory must be packaged and shall comply with the relevant provisions of (GB/T13384: the packaging of export products shall comply with the relevant provisions of export commodities.
7.2.2 Each product neckband comes with the following documents: a. Product certificate:
h. Product instruction manual;
c. Packing list.3 Transportation and Storage
JB 6406.2
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It is strictly forbidden to invert or bump the product during transportation or hoisting, and prevent it from being impacted. The product should be stored in a clean, ventilated place with a temperature between -25 and 40 degrees Celsius and protected from rain, thunder and water. It should not be exposed to the sun for a long time. 8 Product quality guarantee period
The manufacturer shall ensure that the supplied products are properly kept and used correctly by the user for a period of 6 months from the date of use (but shall not exceed 18 months from the date of shipment) ) should be able to work normally, otherwise the manufacturer shall repair or replace it free of charge. Additional notes:
This standard is proposed by the Ministry of Mechanical and Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the Beijing Hoisting and Transport Machinery Research Institute of the Ministry of Mechanical and Electronic Industry. This standard is drafted by Dalian Hoisting Machinery Factory. The main drafter of this standard is Nie Chunhua.
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