Ring hammer crusher

ICS 73.120

D 94

People's Republic of China Machinery Industry Standard

Ring hammer crusher

Ring hammer crusher

JB/T 8911-1999

1999-06-28 Released 2000-01-01 Implementation

National Machinery Industry Bureau

Foreword

This standard is proposed and managed by the National Mining Machinery Standardization Technical Committee.

This standard was drafted: Shenyang Heavy Machinery Group Co., Ltd.

The main drafters of this standard: Liu Guangzhan, He Yongtao, Chang Xide, Guo Ming.

1 Scope

This standard specifies the type and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of the ring hammer crusher .

This standard is applicable to ring hammer crushers (hereinafter referred to as ring crushers ) for crushing various materials (such as coal , coke, etc.) with a compressive strength limit below 12 MPa.

2 Reference standard

The provisions contained in the following standards constitute provisions of this standard by reference in this standard. At the time of publication, the editions indicated were valid. All standards will be revised and parties using this standard should explore the possibility of using the latest version of the following standards.

GB 191-1990 packaging storage and transportation icon

GB/T 3768-1996 Acoustic sound pressure method for the determination of sound source sound power level

GB/T 4064-1983 Guidelines for the safety design of electrical equipment

GB / T 5680-1998 high-manganese steel castings

GB/T 9239-1988 Determination of the allowable imbalance of the balance quality of rigid rotors

GB / T 9439-1988 gray cast iron

GB/T 11352-1989 Cast carbon steel parts for general engineering

GB/T 13306-1991 Signage

GB/T 13384-1992 General technical conditions for the packaging of electromechanical products

JB/T 1604-1998 Mining machinery product model preparation method

JB/T 5000.3-1998 Heavy-duty machinery general technical condition welding parts

JB/T 5000.12-1998 General technical conditions for heavy machinery

JB/T 6397-1992 Large carbon structural steel forgings

3 type and basic parameters

3.1 The ring crusher is divided into light and heavy, as shown in Figure 1 (this figure is not specific to the structure of the ring crusher).

figure 1

3.2 The product model representation method shall comply with the provisions of JB/T 1604.

3.3 Model example:

a) Light ring crusher with rotor diameter of 1100mm and rotor length of 1670mm without bypass groove:

PHQ-1116 ring hammer crusher

b) Heavy-duty ring crusher with a rotor diameter of 1200 mm and a rotor length of 1800 mm with a bypass groove:

PHP-1218 ring hammer crusher

3.4 The basic parameters of the ring crusher shall comply with the requirements of Table 1.

Table 1

Schedule 1

4 Technical requirements

4.1 Basic requirements

4.1.1 The ring crusher shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures.

4.1.2 High manganese steel castings shall comply with the provisions of GB/T 5680.

4.1.3 Carbon steel castings shall comply with the provisions of GB/T 11352.

4.1.4 Forgings shall comply with the provisions of JB/T 6397.

4.1.5 Gray iron castings shall comply with the provisions of GB/T 9439.

4.1.6 Welded parts shall comply with the provisions of JB/T 5000.3.

4.1.7 Electrical equipment should comply with the provisions of GB/T 4064.

4.2 Structural requirements

4.2.1 The transmission can be mounted on both sides of the frame.

4.2.2 Larger ring crushers with a production capacity greater than or equal to 800 t/h shall be provided with a hydraulic opening mechanism for the upper cover.

4.2.3 The rocker adjustment mechanism should be flexible and reliable.

4.2.4 The wearing parts of the ring hammer and rafter of the same type of ring crusher should be interchangeable and easy to replace.

4.2.5 The gap size and arrangement orientation of the raft shall be conducive to the discharge of qualified particle size.

4.2.6 The joint surfaces of the ring crusher should be tight and should not leak.

4.2.7 Dust shall not enter the bearing, and the bearing shall not be allowed to leak oil.

4.2.8 The transmission part of the ring crusher should have a safety shield.

4.3 Performance requirements

4.3.1 The maximum working temperature of the bearing should not exceed 75 °C.

4.3.2 The no-load noise of the ring crusher should not exceed 90dB(A).

4.3.3 The vertical and horizontal amplitude of the ring crusher housing should not exceed 0.20 mm.

4.3.4 The service life of the ring hammer of the ring crusher should not be less than 3000h.

4.3.5 Under the specified conditions of use, the ring crusher should not be less than 7000h from the beginning of use to the first overhaul (referring to the replacement of the spindle, hammer plate, etc.).

4.4 Assembly requirements

4.4.1 The flatness tolerance of the joint surface of the upper and lower body of the ring crusher in any direction is not more than 0.2mm/1000mm, and the distance tolerance between the joint plane and the bearing seat plane is ±0.10mm.

4.4.2 The rotor part shall be subjected to static balance test before the ring hammer is installed. The balance quality grade shall comply with the provisions of G6.3 of GB/T 9239.

4.4.3 The ring hammer on the rotor section is to be counterweighted. The weight of each ring hammer shall be weighed and calibrated, and the weight difference between the two rows of ring hammers shall not exceed 0.17kg. The weight stress of each of the opposing ring hammers is equal in the circumference of several ring hammers.

4.4.4 The joint surfaces shall be even and symmetrical, and there shall be no obvious misalignment and gaps.

4.4.5 The paint quality and color requirements of the ring crusher are uniform and beautiful, and should meet the requirements of JB/T 5000.12.

4.5 Completeness

4.5.1 The complete scope of supply of the ring crusher includes the ring crusher body, transmission and motor.

4.5.2 According to the requirements of the user, the manufacturer can provide relevant spare parts.

4.5.3 The ring crusher shall be provided with a certificate of conformity, instructions for use, product certificate, installation drawing, foundation drawing and packing list.

5 Test methods

5.1 Use a universal gage to inspect the main components of the ring crusher and their dimensions.

5.2 For manual cranking test, each rotating part should be flexible, reliable and free from jamming.

5.3 The empty load test shall not be less than 2 hours, and shall be inspected during the test:

a) Detecting the horizontal and vertical amplitudes with a vibrometer above and on both sides of the ring crusher housing;

b) detecting the noise value according to the provisions of GB/T 3768;

c) Insert the thermometer into the oil filler hole of the bearing housing to check the working temperature of the bearing. Measure every 30 minutes until the temperature stabilizes.

5.4 The ring crusher shall carry out load test at the user. The test contents include:

a) Yield test: It can be measured by the continuous operation folding algorithm, that is, all the crushed materials in a certain period of time are measured and converted into hourly production, and the accumulated time is not less than 0.5h;

b) Discharge particle size test: screening with a national standard mesh sieve group and making a percentage curve of the sieved material;

c) Power test: test with power meter;

d) Repeat a), c) in 5.3.

6 Inspection rules

6.1 Sampling method

6.1.1 For a single-piece small batch of products, one of the products that have been qualified for storage shall be taken. If there is any failure, 50% of the total number of the batch shall be taken for further inspection. If there are still unqualified products, all products shall be inspected.

6.1.2 Samples in the production process shall be taken from the parts that have been qualified for storage or removed from the whole machine (the parts of large products may be subject to the inspection records of the products).

6.2 Factory inspection and type inspection

6.2.1 Each product must be factory tested. The contents and requirements shall comply with the provisions of 4.2.3, 4.3.1, 4.3.2, 4.3.3, 4.4.4 and 4.4.5.

6.2.2 Type inspection shall be carried out in one of the following cases:

a) trial production, finalization and identification of new products;

b) after formal production, if there is a major change in structure, design, process or materials;

c) When the national quality supervision agency proposes the type inspection requirements.

6.2.3 Type inspection items include all requirements of this standard.

7 Marking, packaging, transportation and storage

7.1 The ring crusher shall fix the product label in an obvious place, and its type and size shall comply with the provisions of GB/T 13306. The sign should indicate the following:

a) product model and name;

b) main technical parameters;

c) the factory number;

d) the name of the manufacturer;

e) the date of manufacture;

f) Trademarks.

7.2 The product packaging shall comply with the provisions of GB/T 13384. The text mark on the outer wall of each package shall be in accordance with the provisions of GB 191 during packing and delivery. The contents include:

a) receiving unit, address;

b) product name and model number;

c) the name of the manufacturer and the factory number;

d) Box number, net weight, gross weight, and external dimensions.

7.3 The products shall be packaged according to the packing list, and the packaging shall meet the requirements for waterway and land transportation. Export products should meet the requirements of foreign trade orders.

7.4 The product should be protected from dust during storage and the electrical equipment should be protected from moisture. Regular maintenance should be carried out during storage to prevent corrosion and damage of parts.

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