GB 50276-2010Code for construction and acceptance of crushing and grinding equipment installation engineering (English PDF)

1.0.1

This code is established in order to improve the construction level of crushing and grinding equipment installation engineering, promote technological progress, ensure engineering quality and safety and improve economic benefit.

1.0.2

This code is applicable to the construction and acceptance of crushing and grinding equipment installation engineering for minerals, coal, fire retardant materials, building materials, chemical materials, food, fodder and medicinal materials.

1.0.3

Except meeting this code, the construction and acceptance of crushing and grinding equipment installation engineering shall also be in accordance with the provisions of current relevant national standard.

6.0.1

The crosser laid on the foundation of roll crusher shall be in accordance with the specification of engineering design or accompanying technical document.

6.0.2

The installation level of frame shall be inspected by longitudinally and transversely placing level meter on frame, and shall not be larger than 0.20/1000.

6.0.3

When assembling sliding bearing, the bushing and spherical face tile shall be carried out with re-scrape, and shall be in accordance with the following requirements.

1 The contact angle of bushing and journal should be 100°~120°;

2 For the contact point number on contact face, the brasses shall not be less than 3 and the bearing metals tile shall not be less than 2 in each 25mm×25mm area;

3 The top gap between bushing and journal should be 1 per thousand~1.5 per thousand of journal diameter; the side gap should be 50%~70% of top gap;

4 The contact area of spherical face tile shall not be less than 60% of total area of spherical face tile and shall be concentrated on middle position; the contact point number on contact face shall not be less than 2 in each 25mm×25mm area.

6.0.4

The roller assembling shall meet the following requirements.

1 The gap between rolls shall not be larger than 5mm, and the gap difference shall not be larger than 1mm;

2 The axial misalignment of two rolls shall not be larger than 3mm;

3 The parallel deviation of axis of movable roll and fixed roll shall not be larger than

0.20/1000, and the stress of spring at both sides shall be uniform.

6.0.5

When assembling gear roller, the cusp of roller shall collimate the tooth socket of another roller.

6.0.6

After V belt wheel installation, the relative displacement of symmetrical plane of wheel width shall not be larger than 2 per thousand of central distance, and the tightness degree of each root V belt shall be consistent.

7.0.1

For the installation level of machine base, the transverse shall not be larger than

0.10/1000, and the longitudinal shall not be larger than 0.50/1000.

7.0.2

The parallel deviation of rotor body for machine base and upper frame body joint surface shall not be larger than 0.20/1000, and the installation level of major axis shall not be larger than 0.10/1000.

7.0.3

The gap between hammerhead top of rotator and grid section and between grid sections shall be in accordance with the specification of accompanying technical document.

During detection, the hammerhead shall be fixed on arm disc of rotator with wedge, the movable arm of disc shall be in any position to make each hammerhead vertical with major axis, after that, the gap between both shall be inspected.

7.0.4

When assembling sliding bearing, the bushing shall be carried out with re-scrape, and the coordination of bushing and journal shall be in accordance with the following requirements.

1 The contact angle should be 80°~100°;

2 The contact point number on contact face shall not be less than 3 in each 25mm×

25mm area;

3 The side gap should be 1 per thousand~1.2 per thousand of journal diameter;

4 The top gap shall be 1.5 times of side gap.

7.0.5

The hammerhead on rotator shall not be dismantled, if necessary, it shall be assembled according to indicated mark by manufacturer.

7.0.6

The sealing of joint between upper and lower frames and joint between all door covers and frame shall be tight without leak.

4 When the sleeve shaft diameter is larger than 2200mm, the sum of side gaps of both sides should be 1.5 per thousand~2 per thousand of journal diameter of sleeve shaft.

9.1.7

After journal metal and bearing seat assembling, the cooling water system shall be tested with 0.5MPa water pressure, and the pressure shall be maintained with 10min, and then without leakage.

9.1.8

The oil pipe channel of hydraulic oil of journal metal shall be tested with 32MPa oil pressure after assembling; the pressure shall be maintained with 5min, and then without leakage.

9.2 Drum, End Cover & Toothed Ring

9.2.1

The drum and end cover shall be inspected before assembling; the straightness deviation of drum surface shall not be larger than 1 per thousand of total length of drum, and the roundness deviation of both ends of drum shall not be larger than 1.5 per thousand of drum diameter.

9.2.2

When assembling drum and end cover, the joint surface shall be cleaned first, and then coated with antirust and sealing material; the contact of joint surface shall be tight without adding any adjusting gasket.

9.2.3

The drum and end cover shall be assembled according to mark, the alignment pin must be fully loaded, and the bolts shall be uniformly tightened up after meeting assembling requirements.

9.2.4

The assembling for two sleeve shafts shall be in accordance with the following requirements.

1 The axial gap between shaft shoulder and main bearing of two sleeve shafts shall be in accordance with the specification of accompanying technical document;

2 The relative elevation deviation of upper bus bar of two sleeve shafts shall not be larger than 1mm; the installation level of two sleeve shafts shall be checked with level meter and shall not be larger than 0.2/1000, and the feed end shall be higher than discharge end;

3 The axis of two sleeve shafts shall be on the same straight line; when indirectly detecting end face of main bearing with indicator (Figure 9.2.4), the ending runout shall not be larger than those specified in Table 9.2.4;

4 The contact requirements of two sleeve shafts with journal metal shall be in accordance with those specified in Article 9.1.6 of this code.

9.2.5

The jogged toothed ring should be installed on drum after drum installed on main bearing; the toothed ring assembling shall be in accordance with the specification of accompanying technical document; if no specification, it shall be in accordance with the following requirements.

1 The burrs, anticorrosive paint and dirt on contact surface of toothed ring and drum shall be cleaned before assembling;

12.0.1

The installation level of beater wheel mill shall be inspected with level meter, and shall not be larger than 0.20/1000.

12.0.2

The deviation of each part liner gap of beater wheel mill with design gap shall not be larger than 3mm.

12.0.3

The permissible variation of throat gap of mill with design gap shall be-5mm~0.

12.0.4

When assembling connecting plate with front wheel enclosure, the fitting surface shall be jointed tightly, and the gap shall not be larger than 0.05mm.

12.0.5

The ending runout of impact wheel shall not be larger than 2mm.

12.0.6

The contact rate of cone hole of impact wheel and cone section of major axis shall not be less than 80%.

12.0.7

The gap between impact wheel and unit enclosure and gap between two bearings shall be in accordance with the specification of accompanying technical document.

13.0.1

The test run of crushing and grinding equipment shall be in accordance with the following requirements.

1 When rotating each moving part by hand or other modes, the rotation shall be flexible; the rotation direction of motor shall be corresponding to rotation direction required by equipment; the wet mill grease jet apparatus shall be carried out with jet test first, and the tooth surface of gearwheel shall be fully sprayed or coated with grease;

2 The meshing of gear pair, chain and chain wheel shall be stable without abnormal noise and abrasion;

3 The driving belt shall be free from slipping, and the misalignment quantity of straight belt shall not exceed those specified in the design;

4 The operation of each moving part shall be stable without abnormal phenomena; the liner shall be free from looseness and abnormal noise;

5 The working of lubrication, hydraulic, pneumatic and cooling system shall be normal without leakage;

6 The temperature rise of sliding bearing shall not exceed 35°C, the maximum temperature shall not exceed 70°C; the temperature rise of rolling bearing shall not exceed

45°C, the maximum temperature shall not exceed 90°C; the input temperature of hydraulic pump shall not exceed 60°C, and shall not be less than 15°C;

7 For the continuous test run time of no load, the fan mill shall be 6h~8h; other crushing and grinding equipment shall be 2h~4h, cycle, round set-hammer and reversible hammer crusher shall be rotated 1h~2h per front and opposite direction.

13.0.2

Before no-load test run, the safety protection system must be in accordance with the specification of accompanying technical document; after test run, each joint part must be inspected, and the connecting bolt shall be tightened.

13.0.3

The no-load test run of jaw crusher shall be in accordance with those specified in

Article 13.0.1 and Article 13.0.2 of this code, besides, shall be in accordance with the following requirements.

1 The connecting rod shall be in he highest position before test run;

2 The obvious noise shall not be allowed between tightening spring and tie bar;

3 The combination position of main bearing, connecting rod bearing and oil receiver shall be free from oil leakage;

4 The complete machine shall be free from obvious fluctuation during test run; when the equipment power is less than 100kW, the fluctuation quantity shall not be larger than 2mm;

when the equipment power is larger than or equal to 100kW, the fluctuation quantity shall not be larger than 3mm.

13.0.4

The no-load test run of gyrator crusher shall be in accordance with those specified in

Article 13.0.1 and Article 13.0.2 of this code, besides, shall be in accordance with the following requirements.

1 The swaying of crushing round-set hammer shall be stable without obvious vibration, and the autorotation rate shall not exceed 15r/min;

2 The cone gear shall be free from periodical noise.

13.0.5

The no-load test run of cone crusher shall be in accordance with those specified in

Article 13.0.1 and Article 13.0.2 of this code, besides, shall be in accordance with the following requirements.

1 The test run shall be carried out before assembling components on adjusting ring;

2 For the autorotation rate of crushing head, the hydraulic pressure of single cylinder shall not exceed 20r/min; the spring cone and turntable cone shall not exceed 15r/min;

3 The cone gear shall be free from periodical noise.

13.0.6

The no-load test run of ring hammer crusher shall be in accordance with those specified in Article 13.0.1 and Article 13.0.2 of this code, besides, shall be in accordance with the following requirements.

1 The rotor operation shall be stable without obvious vibration;

2 The vibration amplitude of bearing seat shall not be larger than 0.2mm.

13.0.7

The no-load test run of impact crusher shall be in accordance with those specified in

Article 13.0.1 and Article 13.0.2 of this code, besides, shall be in accordance with the following requirements.

1 The temperature rise of bearing shall not be larger than 30°C;

2 The bidirectional amplitude of rotor bearing seat shall not be larger than 0.2mm.

13.0.8

The no-load test run of grinding equipment shall be in accordance with those specified in Article 13.0.1 and Article 13.0.2 of this code, besides, shall be in accordance with the following requirements.

1 The vibration amplitude of retarder shall not be larger than 0.05mm; the amplitude of driving axle shall not be larger than 0.08mm, and the vibration amplitude of main bearing shall not be larger than 0.1mm;

2 The operation shall be stable, and the gear and retarder shall be free from abnormal vibration and noise.

13.0.9

The no-load test run of vibrating mill shall be in accordance with those specified in

Article 13.0.1 and Article 13.0.2 of this code, besides, shall be in accordance with the following requirements.

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