Some standard content:
Mechanical Industry Standard of the People's Republic of China
General Purpose Centrifugal Blowers
1 Subject Content and Scope of Application
JB/T 7258-94
Replaces ZBJ72007-87
This standard specifies the technical requirements, structure, test and acceptance, and requirements for marking, packaging, transportation and storage of general purpose centrifugal blowers.
This standard applies to centrifugal blowers (hereinafter referred to as blowers) with an outlet pressure of: 0.015MPa≤p (gauge pressure)≤0.2MPa or a pressure ratio of 1.15≤e≤3, dust content and other solid impurities content not exceeding 10mg/m3, and the medium is air, clean coal gas, nitrogen, oxygen-enriched gas, etc.
For centrifugal blowers that transport other non-corrosive, non-flammable, and non-explosive gases, it can also be implemented as a reference. 2 Reference standards
GB/T2888 Noise measurement method for fans and Roots blowersGB/T13306 Label
JB3165 Thermal performance test of centrifugal and axial blower compressorsJB/T6444 General technical conditions for fan packaging3 Technical requirements
3.1 The blower shall comply with the requirements of this standard and the drawings and technical documents approved in accordance with the prescribed procedures. When the supply and demand parties have a technical agreement, the design and manufacture shall be carried out in accordance with the technical agreement of both parties. 3.2 The design life of the blower, prime mover and its ancillary equipment shall be not less than 20 years (except for wearing parts) under the specified working conditions. 3.3 When the demander has requirements for environmental noise, it shall be specified in the technical agreement between the two parties. In order to meet the specified noise limit, the supplier may design or select appropriate silencers according to the requirements of the demander. 3.4 The design of the blower and its supporting ancillary equipment shall take into account the convenience of use and maintenance. 3.5 The materials used for the blower shall comply with the relevant national or Ministry of Metallurgy standards. If there are special requirements, they must be specified in the technical agreement between the two parties. 3.6 The main shaft of the blower can be a rigid shaft or a flexible shaft. The relationship between the first-order critical speed nerl, the second-order critical speed ncr2 of the main shaft and the 100% speed n100 and the minimum continuous working speed nmin shall comply with the provisions of Table 1. 1
4 Structure
4.1 Casing
Rigid shaft
Flexible shaft
Electric liftbzxZ.net
n≥1.20m10u
Men≤0.85mmin
ner221. 20m100
Steam turbine or turbo expander
nen=≥1.26n100
mten≤0.85nmin
ner221. 26noo
4.1.1 The blower casing is generally made of cast iron, cast steel or welded structure. Its structural type can be horizontal split or horizontal split plus vertical split. Approved by the Ministry of Machinery Industry of the People's Republic of China on July 18, 1994 and implemented on July 1, 1995
JB/T7258-94
4.1.2 For the convenience of assembly and disassembly, a positioning pin hole or a boss (stopper) should be designed on the joint surface. When the joint surface adopts a top screw, a suitable pit should be machined on the other joint surface corresponding to the top screw hole to prevent poor joint. 4.1.3 If the casing has a vertical split surface, a suitable stopper should generally be selected. 4.1.4 The design of the casing and the legs must ensure sufficient strength and rigidity. When the external force and external torque at the interface flange reach the maximum allowable value, it should not affect the normal operation of the blower. 4.2 Partition
Partitions are generally horizontally split. When the side plate of the partition and the circulator are connected with bolts, the nuts and bolts should be welded or dead. 4.3 Rotor
4.3.1 The main shaft is generally made of forged steel, and its structural type can be a smooth shaft or a stepped shaft. The main shaft must be heat treated, and its mechanical properties should meet the design requirements. The main shaft must be inspected by non-destructive testing. 4.3.2 When selecting the rotor material, the supplier and the user should reach a consensus on various factors that affect the material properties. 4.3.3 When the technical agreement between the two parties stipulates that the rotor shaft vibration is measured directly on the shaft, the vibration probe should be installed on the journal near the bearing. The corresponding journal ring surface is not allowed to be scratched, and discontinuous areas such as oil holes and keyways are not allowed to appear. This part should not be sprayed, and the final surface roughness Ra is 0.8μm.
In order to ensure the measurement accuracy, this part should be properly demagnetized or otherwise treated. The residual magnetism of the main shaft does not exceed 5Gs. 4.3.4 The impeller of the blower is generally of semi-open and closed types. The semi-open impeller is composed of a wheel disc and blades; the closed impeller is composed of a wheel disc, a wheel cover and blades. The impeller can be made by welding, riveting, milling and casting. No matter which method is used, the impeller must have sufficient strength.
4.3.5 The impeller can be keyed or keyless, and can be hot-mounted or cold-mounted on the main shaft. No matter which structural type is used, it must be ensured that the balance state of the rotor will not be changed at the highest operating speed until the tripping speed. 4.3.6 According to the requirements of pneumatic calculation and structural design, the rotor can be with or without a balancing disk, and the balancing disk should be equipped with a non-contact seal. 4.4 Seal
4.4.1 The seals of the blower are mainly labyrinth seals, mechanical seals, exhaust seals or packing seals, and different types are allowed to be used in combination.
When a labyrinth seal is used, the sealing sheet must have a suitable sealing gap whether it is installed on a fixed part or a rotating part. The labyrinth seal should be designed to be easy to replace. When the seal is installed on the fixed part, a protective sleeve should be installed on the shaft. 4.4.2 The design of the sealing component should take into account the stability of the rotor. 4.5 Bearings and bearing boxes
4.5.1 The blower can use rolling bearings or sliding bearings to withstand the axial force and radial force of the rotor. 4.5.2 When rolling bearings are used, rolling bearings that can withstand radial forces should be installed in the bearing boxes on both sides, and rolling bearings that can withstand thrust should be installed on the thrust side.
4.5.3 Sliding bearings are divided into radial bearings and thrust bearings. 4.5.3.1 The design of sliding bearings should ensure that there is a stable oil film under all working conditions (including tripping speed). 4.5.3.2 Bearings are generally made of cast steel or forged steel with cast bearing alloy. Bearings should have anti-rotation measures. 4.5.3.3 When measuring the bearing temperature on the bearing box, the temperature sensor should be installed on the bearing, and the installation position should be considered during design. 4.5.4 Thrust bearings should be able to withstand axial forces in both directions. 4.5.5 The bearing box is a casting or welding structure + horizontal split type. The box body can be cast with the blower casing as a whole, or it can be a separate component. 4.5.5.1 The design of the bearing box should take into account the minimization of lubricating oil foam. 4.5.5.2 The shaft hole of the bearing box should be designed with an appropriate type of seal to prevent the lubricating oil from leaking axially or impurities from entering the bearing box. 4.5.5.3 If the user requires it, the bearing box should be designed to be able to install a vibration meter. In addition, at least provide a location for installing a non-contact vibration probe at each bearing or nearby. If two probes are used, they should be arranged at an interval of 80° to 100° (generally 90° ± 5°). 4.6 Coupling
4.6.1 The coupling between the blower, transmission, and prime mover can be an elastic coupling or other type of coupling according to the power and speed. 436
JB/T 7258-94
4.6.2 The design and selection of couplings should take into account: rigid couplings and flexible hard-toothed couplings should work for at least 100,000 hours, and flexible soft-toothed couplings should work for at least 50,000 hours.
4.6.3 The coupling should be equipped with a protective cover. The protective cover should be easy to disassemble for maintenance. 4.6.4 The coupling should be keyed or connected to the corresponding shaft by interference fit. 4.6.5 In order to ensure a balanced state, the coupling bolts should have basically the same weight. 4.7 Transmission
4.7.1 The transmission case is made of cast iron or a steel plate welded structure, split horizontally. According to the transmitted power and speed, the transmission gears of the transmission are generally arc cylindrical gears or involute cylindrical gears. 4.7.2 The critical speed of the low-speed shaft of the transmission is not allowed to be within ±15% of the working speed of the high-speed shaft. 4.7.3 At the highest continuous speed of the blower, the design life of the transmission gear pair is: when using hard-toothed gear pairs, the continuous operation time is not less than 3 years, and when using soft-toothed gear pairs, it is 50,000 hours. 4.8 Silencers
When the purchaser requires the installation of silencers, soundproof enclosures and other devices, their technical requirements should be specified in the agreement or contract. 4.9 Lubrication system
4.9.1 Blowers using sliding bearings should generally have a complete lubricating oil system and provide sufficient lubricating oil to each lubrication point at an appropriate pressure.
4.9.2 The lubricating oil system generally consists of an oil tank, an oil pump (main oil pump and backup oil pump), an oil cooler, an oil filter, and oil supply and return oil pipelines. An oil heater should be installed when necessary.
4.9.3 Oil tank
4.9.3.1 The main body of the oil tank is generally made of welded steel plates. The inner surface of the oil tank should be rust-free and appropriate anti-rust measures should be taken, but it should not be painted. The bottom plate of the oil tank should generally be designed to be inclined, and an oil drain port should be set at the lowest point to ensure that it can be completely emptied. 4.9.3.2 The oil tank should be equipped with an oil level indicator. In order to check and clean the inside of the oil tank, an opening with a minimum diameter of 500mm should be left on its cover. All openings on the oil tank must not leak. 4.9.3.3 In order to degas and precipitate debris, the oil capacity of the oil tank below the lowest oil level should be no less than 8 times the oil consumption of the fan unit per minute, and at the same time, there should be no less than 5 times the oil consumption of the fan per minute from the lowest oil level to the oil pump being emptied. 4.9.3.4 If an oil heater is provided, the heater should have sufficient power to heat the oil to the required minimum temperature within 12 hours. a When a steam heater is used, the working oil is not allowed to be directly connected to the steam pipeline. b. When an electric heater is used, the electric heating rod should be controlled by a thermostat. When the oil level drops to 50mm above the rod body, the power supply should be automatically cut off and the heating should be stopped.
4.9.3.5 When the two parties have a technical agreement or the supplier deems it necessary, a high-level oil tank can be installed. The high-level oil tank is used as a backup oil tank when the machine is stopped. 4.9.3.6 The design of the high-level oil tank should at least allow the machine to have enough lubricating oil to stop and supply to 0 speed after all oil pumps stop supplying oil.
4.9.3.7 In order to meet the minimum lubrication pressure requirements of the bearings, the installation of the high-level oil tank should be at a sufficient height. 4.9.4 Oil pump
4.9.4.1 The main shaft pump of the lubricating oil system can be driven independently or by the main shaft. The backup oil pump can be an electric oil pump and can be automatically switched in.
4.9.4.2 The rated flow of the oil pump should be 115% of the oil required when the blower is running at the normal operating point. 4.9.4.3 When the main oil pump and the standby oil pump are driven separately, in order to ensure the normal operation of the blower, when the oil pressure drops below the safety value, the electric standby oil pump should be able to start automatically. 4.9.5 Oil cooler
4.9.5.1 According to the needs, it can be a single or double-tube oil cooler, or an air-cooled oil cooler. When a tube oil cooler is used, the flow rate of water in the tube should generally be 1.5~2.5m/s. The fouling coefficient on the water side should be given in the technical agreement between the two parties, otherwise it should be designed at 1.7×10-4m2·K/W for general cooling water and 0.85X×10-m*·K/W for closed-circulation cooling water. 437
JB/T 7258-94
4.9.5.2 The capacity of the oil cooler shall meet 120% of the total heat generated by the cooling blower when operating at the highest continuous operating speed and the highest inlet temperature of the coolant.
4.9.6 Oil filter
4.9.6.1 The lubricating oil filter shall be able to block 95% of particles larger than 25gm and 99.5% of particles larger than 30μm. 4.9.6.2 The oil filter housing shall be designed according to the maximum working pressure of the oil system. 4.9.6.3 The oil filter shall be a full-flow double filter with an interlock switching valve. 4.10 Adjustment and control
4.10.1 The adjustment and control items of the blower shall be selected according to the technical agreement requirements of both parties. The method can be pneumatic, hydraulic, electric or manual, or a combination of different methods. Regardless of the method used, a manual mechanism shall be provided. 4.10.2 The adjustment mode can be selected from inlet throttling and variable speed adjustment. When the blower is driven by a steam turbine or a turbo expander, variable speed adjustment should be given priority.
4.10.3 Regardless of which adjustment mode is adopted, it should be ensured that within the maximum adjustment range, the minimum flow rate of the blower after adjustment should be greater than 5% of the nozzle flow rate.
4.10.4 In order to ensure safe operation and prevent surge, the blower can be designed with automatic or manual anti-surge devices according to user requirements. Its supply and selection should be specified in the technical agreement between the two parties. 4.10.5 In order to facilitate control, according to the agreement, the blower can be equipped with centralized or locally installed instruments to monitor the target display alarm and interlock shutdown.
4.10.6 The design of the adjustment control system should make the entire adjustment signal conform to the entire working range of the blower, and the maximum adjustment pulse should conform to the maximum power of the blower; for steam turbine or turbo expander drive, it should conform to the highest continuous working speed of the blower. When the blower is operating normally, it should be able to transition to other adjustment modes without impact. 4.10.7 The blower should generally be equipped with appropriate instruments as specified in Table 2. Table 2
Blower inlet pressure
Blower outlet pressure
Blower inlet temperature
Blower outlet temperature
Oil level in main oil tank
Lubricating oil inlet pressure before bearing
Lubricating oil pump outlet oil pressure
Oil cooler outlet temperature
Lubricating oil return temperature
Oil cooler inlet temperature
Oil filter pressure difference
Radial bearing temperature
Thrust bearing temperature
Rotor axial displacement
Shaft or bearing grip
Speed (for variable speed drive)
Note: ①In the table, “.\
”, “high”, “low” marks indicate that settings must be made; “438
(·）
（·）
\ indicates that settings do not need to be made.
(High)
(High)
(High)
(High)
(High)
(High)
(High)
(High)
JB/T7258—94
②“(·)”“(High)\“(Low)\Indicates recommended installation③Items 1 to 4 in the table are generally added by users to their own pipes (except for the supply of sets). 5 Test and acceptance
5.1 Test of pressure-bearing parts
5.1.1 After the blower casing is processed and assembled, it must be subjected to a water pressure of 1.3 times the design pressure of the casing. The test pressure should be maintained for at least 30 minutes without leakage.
Auxiliary equipment belonging to pressure vessels should be inspected and tested in accordance with relevant standards. 5.1.2
5.1.3 During the water pressure test, if leakage occurs, the defective parts are allowed to be repaired according to the regulations. After the repair, the tests specified in Articles 5.1.1 and 5.1.2 should be repeated.
5.2 Impeller overspeed test
5.2.1 The impeller should withstand the overspeed test at the following speeds for at least 1 minute: a.
Electric driven blower, 112% of 100% speed (n100); single-shaft steam turbine driven blower: 118% of 100% speed (n10m); split-shaft steam turbine driven blower, 121% of 100% speed (n100). The impeller after overspeed needs to be inspected by flaw detection or coloring. 5.3 Rotating parts balance test
5.3.1 The blower rotor, transmission part of the transmission and coupling need to be balanced. 5.3.2
The balancing accuracy of rotating parts shall be calculated according to formula (1): eU/M=GX1 000/w
Wherein: e-
rotating part mass center offset, um;
allowable unbalance g·mm;
rotating part weight, kg;
balancing accuracy, mm/s (see Table 3)
-the maximum operating angular velocity of the rotating part, rad/s. 5.3.3 Application scope of single-plane balancing test
The ratio of the average width 6\ of the impeller to the maximum diameter D of the impeller 6\/D≤0.1: as the final balancing of single-stage impellers or rotors and the pre-balancing of other impellers or rotors not in the above cases. Note: b*-t
impeller inlet width; b2-impeller outlet width. 5.3.4 Application scope of two-plane balancing test
Note: Two-plane balancing is generally called double-plane balancing. 5.3.4.1 Rotating parts that cannot meet the requirements of the single-sided balancing test shall be balanced on both sides. 5.3.4.2 Single-stage impellers or multi-stage impellers with a ratio of the impeller value to the maximum diameter D of the impeller 5*/D>0.1 shall be balanced on both sides. 5.3.5 When performing the balancing test, the balancing accuracy level corresponding to the maximum operating speed of the rotating part shall be in accordance with the provisions of Table 3. Table 3
Maximum operating speed of rotating parts n, r/rmin
Accuracy level
5.3.6 When the maximum operating speed of the rotating part n≥3000r/min, the weight removal method is generally adopted; when n<3000r/min, the weight removal or weighting method is allowed; the weight removal depth of the impeller shall not be greater than 0.5mm, and the strength of other rotating parts shall not be affected by weight removal. The selection of the counterweight position should avoid the rivets of the riveted impeller, and the counterweight on one correction surface is not allowed to exceed two locations. 439
5.4 Mechanical operation test
JB/T 7258—94
5.4.1 Each blower must undergo no-load or load mechanical operation test before leaving the factory. In special cases, the test can be conducted by the user after consultation between the supplier and the buyer. 5.4.2 During the mechanical operation test, the blower driven by the steam turbine shall be accelerated to the tripping speed, and after reaching a stable state, it shall be operated at the highest continuous speed for 2 hours. The blower driven by the motor shall be operated at 100% speed for 2 hours after the lubricating oil temperature reaches a stable state. 5.4.3 When the blower is subjected to the mechanical operation test at the specified maximum continuous operating speed, the root mean square vibration velocity value of the bearing part shall not be greater than 4mm/s. If the shaft vibration is measured, its double amplitude peak-to-peak value shall not exceed the value specified in Figure 1. 100
5.5 Pneumatic performance test
5×103
100% main shaft speed r/min
5.5.1 Newly designed products, products produced by transferred factories, and old products with major modifications shall all be subjected to pneumatic performance tests. The pneumatic performance test of the blower shall be carried out in accordance with JB3165.
5.5.2 Tolerance of aerodynamic performance of blower: For fixed speed blower, the tolerance of inlet volume flow rate under rated pressure is 0~+5%, or the allowable deviation of outlet pressure under rated flow rate from the specified value is 0~+5%, and the shaft power deviation shall not exceed +4% of the specified value; for blower driven by steam turbine or turbo expander, the shaft power deviation shall not exceed +4% of the specified value under the condition of ensuring outlet pressure and flow rate, and the flow rate and pressure can reach the rated value by changing the speed. 5.5.3 Air is allowed to replace other working media during the test, but various influencing factors must be considered and necessary conversion and correction must be made. 5.5.4 When the supplier's factory does not have the test conditions, the aerodynamic performance test of the blower can be carried out at the buyer's workplace, but it should be stipulated in the technical agreement between the two parties.
5.6 The noise test of the blower
The method shall be carried out in accordance with GB/T2888.
5.7 The buyer has the right to supervise the test. When the technical agreement between the two parties stipulates, the supplier shall determine the test date in advance and notify the purchaser to send personnel to participate. If the purchaser fails to arrive on time, it will be treated as automatically giving up supervision. 5.8 All tests must have test reports or records, and the materials of rotating parts and the certificates of conformity of purchased parts must be kept for reference. 5.9 Acceptance
5.9.1 Each blower must be inspected and qualified by the inspection department before it can be shipped out of the factory, and a product certificate of conformity must be attached when it leaves the factory. 5.9.2 The random technical documents and complete sets of supply items of blower products are all accepted by the inspection department. 440
6 Appearance, coating and rust prevention
JB/T7258-94
6.1 All unprocessed surfaces of parts and components should be painted unless there are special regulations or requirements; the appearance paint color of the main and auxiliary machines and pipelines of the blower should comply with the relevant regulations of the supplier's factory if there are no special requirements. 6.2 The appearance of the parts should be smooth and flat, without rust, and after assembly, there should be no defects such as oil stains and bruises. 6.3 The coating must be firm. The decorative coating is not allowed to have defects such as sagging, blistering, whitening, loss of gloss, scratches and bruises. The final appearance should be smooth, beautiful and elegant, and the color should be uniform. 6.4 All exposed bolts, nuts and washers must be bluing treated, and the exposed length of the bolts should be basically flush. 6.5 The exposed processed surfaces that do not require painting must not have rust, and anti-rust oil or anti-rust should be applied before packaging: the anti-rust oil or anti-rust grease layer should be uniform and continuous, without bubbles or missing coating. 7 Complete set supply and guarantee
7.1 The complete set supply items and quantities of products should be supplied according to the product drawings, relevant technical documents or the technical agreement and contract requirements of both parties. 7.2 Provided that the purchaser complies with the storage, installation, use, maintenance and transportation rules, the warranty period of the product shall be 12 months from the date the blower is put into operation, but shall not exceed 18 months from the date of shipment from the supplier. During the warranty period, if there is a failure in use due to design errors, improper material selection and poor manufacturing of parts and components, the supplier shall provide the purchaser with free repair or replacement of parts and components.
8 Marking, packaging, transportation and storage
8.1 Marking
8.1.1 The main engine and main auxiliary equipment of each product shall be nailed with a product label in a conspicuous position. 8.1.1.1 The content of the blower label shall include: product name, model, inlet pressure, outlet pressure, inlet flow, medium inlet temperature, medium inlet density, spindle speed, prime mover power, product number, manufacturing date, (country name), factory name, etc. 8.1.1.2 The content of the transmission label should include: product name, model, maximum transmission power, speed ratio, driving shaft speed, driven shaft speed, product number, manufacturing date, (country name) name, etc. 8.1.2 According to the needs, the corresponding parts of each product should be fixed with working condition signs. 8.1.2.1 The blower, transmission, and oil pump housing should be fixed with indication marks of the rotor rotation direction. 8.1.2.2 The water and oil inlet and outlet of the valve housing, oil cooler, etc. should be nailed with indication marks of the flow direction. 8.1.2.3 The oil tank should have an oil level indicator, and the highest and lowest oil levels during operation should be marked. 8.1.3 The size specifications and technical requirements of all labels should comply with the provisions of GB/T13306. 8.2 Packaging and transportation
The blower can be packaged according to the number, item, and number of pieces specified in the packing list only after the mechanical operation test is passed. 8.2.1
8.2.2 The product can be packed in boxes or simple packages, but it must be guaranteed to withstand multiple loading and unloading and long-distance transportation, and moisture-proof and vibration-proof measures should be taken. 8.2.3 Various instruments and vibration-prone parts should be specially packaged and protected with fillers. 8.2.41
The design of the packaging box should comply with the provisions of JB/T6444 and take into account smooth drainage and good ventilation conditions. The design of the packaging box should comply with the relevant regulations for water, rail and other transportation. 8.2.51
The following technical documents should be attached to the product: 8.2.6
Packing list (including random drawings);
Installation, use and maintenance instructions for the blower and its ancillary equipment; product certificate.
8.3 Storage
8.3.1 Each package of the product should be placed flat and stable during storage, and should be at least 200~300mm away from the ground. 8.3.2 The storage environment should be protected from rain, sun and water accumulation. 441
JB/T7258-94
8.3.3 During the storage period, the product should be unpacked and inspected once every six months (three months for the first shipment by ship), and pay attention to: whether the protective layer of each part has lost its protective function, whether the paint has changed color or peeled off, and the protective layer should be replaced if necessary. b.
Whether the logo of the package is peeled off and unclear, it should be reprinted if necessary. Additional remarks:
This standard was proposed by the National Technical Committee for Standardization of Fans. This standard is under the jurisdiction of Shenyang Blower Research Institute. This standard was drafted by Shaanxi Blower Factory and Shenyang Blower Factory. The main drafters of this standard are Zhang Piyan, Song Lili, Guo Qingfu and Chen Mingliang. 4421 Each blower must be inspected and qualified by the inspection department before it can leave the factory, and a product certificate of conformity must be attached when leaving the factory. 5.9.2 The random technical documents and complete set supply items of the blower products are all accepted by the inspection department. 440
6 Appearance, coating and rust prevention
JB/T7258-94
6.1 All unprocessed surfaces of parts and components should be painted unless there are special regulations or requirements; the appearance paint color of the main and auxiliary machines and pipelines of the blower should comply with the relevant regulations of the supplier's factory if there are no special requirements. 6.2 The appearance of the parts should be smooth and flat, without rust + no defects such as oil stains and bumps after assembly. 6.3 The coating must be firm. The decorative coating is not allowed to have defects such as sagging, bubbling, whitening, loss of gloss, scratches and bumps, and the final appearance should be smooth, beautiful and elegant, and the color should be uniform. 6.4 All exposed bolts, nuts and washers shall be bluing treated, and the exposed length of the bolts shall be basically flush. 6.5 Exposed processed surfaces that do not need to be painted shall not be rusted. Anti-rust oil or anti-rust grease shall be applied before packaging: the anti-rust oil or anti-rust grease layer shall be uniform and continuous, without bubbles or missing coating. 7 Complete set supply and guarantee
7.1 The complete set supply items and quantity of products shall be supplied in accordance with product drawings, relevant technical documents or the technical agreement and contract requirements of both parties. 7.2 Under the condition that the purchaser complies with the storage, installation, use, maintenance and transportation rules, the warranty period of the product shall be 12 months from the date the blower is put into operation, but not more than 18 months from the date of shipment from the supplier's factory. During the warranty period, if the use failure is caused by the design error of the parts and components, improper material selection and poor manufacturing surface, the supplier shall provide the purchaser with repair or replacement of parts and components free of charge.
8 Marking, packaging, transportation and storage
8.1 Marking
8.1.1 The main engine and main auxiliary equipment of each product should be nailed with product labels in obvious positions. 8.1.1.1 The content of the blower label should include: product name, model, inlet pressure, outlet pressure, inlet flow, medium inlet temperature, medium inlet density, main shaft speed, prime mover power, product number, manufacturing date, (country name), factory name, etc. 8.1.1.2 The content of the transmission label should include: product name, model, maximum transmission power, speed ratio, driving shaft speed, driven shaft speed, product number, manufacturing date, (country name) factory name, etc. 8.1.2 As needed, the corresponding parts of each product should be fixed with working condition marks. 8.1.2.1 The blower, transmission, and oil pump housing should be fixed with indication marks of the rotor rotation direction. 8.1.2.2 The water and oil inlet and outlet of the valve housing, oil cooler, etc. should be nailed with indication marks of the flow direction. 8.1.2.3 The oil tank should have an oil level indicator, and the highest and lowest oil levels during operation should be marked. 8.1.3 The size specifications and technical requirements of all signs should comply with the provisions of GB/T13306. 8.2 Packaging and transportation
The blower can be packed according to the number, item and number of pieces specified in the packing list only after the mechanical operation test is qualified. 8.2.1
8.2.2 The product can be packed in boxes or simple packages, but it must be guaranteed to be loaded and unloaded multiple times and transported over long distances, and moisture-proof and vibration-proof measures should be taken. 8.2.3 Various instruments and vibration-sensitive wearing parts should be specially packaged and protected with fillers. 8.2.41
The design of the packaging box should comply with the provisions of JB/T6444 and take into account smooth drainage and good ventilation conditions. The design of the packaging box should comply with the relevant regulations for water, rail and other transportation. 8.2.51
The following technical documents shall be attached to the product:8.2.6
Packing list (including attached drawings);
Installation, operation and maintenance instructions for blowers and auxiliary equipment; Product certificate.
8.3 Storage
8.3.1 Each package of the product shall be placed flat and stable when stored, and shall be at least 200~300mm away from the ground.8.3.2 The storage environment shall be protected from rain, sun and water accumulation. 441
JB/T7258-94
8.3.3 During the storage period, the product shall be unpacked and inspected once every six months (three months for the first shipment by ship), and attention shall be paid to: whether the protective layer of each part has lost its protective function, whether the coating has changed color or peeled off, and the protective layer shall be replaced if necessary.b.
Whether the markings of the packaging are peeled off and unclear, and they shall be reprinted if necessary. Additional Notes:
This standard was proposed by the National Technical Committee for Standardization of Fans. This standard is under the jurisdiction of the Shenyang Blower Research Institute. This standard was drafted by the Shaanxi Blower Factory and the Shenyang Blower Factory. The main drafters of this standard are Zhang Piyan, Song Lili, Guo Qingfu, and Chen Mingliang. 4421 Each blower must be inspected and qualified by the inspection department before it can leave the factory, and a product certificate of conformity must be attached when leaving the factory. 5.9.2 The random technical documents and complete set supply items of the blower products are all accepted by the inspection department. 440
6 Appearance, coating and rust prevention
JB/T7258-94
6.1 All unprocessed surfaces of parts and components should be painted unless there are special regulations or requirements; the appearance paint color of the main and auxiliary machines and pipelines of the blower should comply with the relevant regulations of the supplier's factory if there are no special requirements. 6.2 The appearance of the parts should be smooth and flat, without rust + no defects such as oil stains and bumps after assembly. 6.3 The coating must be firm. The decorative coating is not allowed to have defects such as sagging, bubbling, whitening, loss of gloss, scratches and bumps, and the final appearance should be smooth, beautiful and elegant, and the color should be uniform. 6.4 All exposed bolts, nuts and washers shall be bluing treated, and the exposed length of the bolts shall be basically flush. 6.5 Exposed processed surfaces that do not need to be painted shall not be rusted. Anti-rust oil or anti-rust grease shall be applied before packaging: the anti-rust oil or anti-rust grease layer shall be uniform and continuous, without bubbles or missing coating. 7 Complete set supply and guarantee
7.1 The complete set supply items and quantity of products shall be supplied in accordance with product drawings, relevant technical documents or the technical agreement and contract requirements of both parties. 7.2 Under the condition that the purchaser complies with the storage, installation, use, maintenance and transportation rules, the warranty period of the product shall be 12 months from the date the blower is put into operation, but not more than 18 months from the date of shipment from the supplier's factory. During the warranty period, if the use failure is caused by the design error of the parts and components, improper material selection and poor manufacturing surface, the supplier shall provide the purchaser with repair or replacement of parts and components free of charge.
8 Marking, packaging, transportation and storage
8.1 Marking
8.1.1 The main engine and main auxiliary equipment of each product should be nailed with product labels in obvious positions. 8.1.1.1 The content of the blower label should include: product name, model, inlet pressure, outlet pressure, inlet flow, medium inlet temperature, medium inlet density, main shaft speed, prime mover power, product number, manufacturing date, (country name), factory name, etc. 8.1.1.2 The content of the transmission label should include: product name, model, maximum transmission power, speed ratio, driving shaft speed, driven shaft speed, product number, manufacturing date, (country name) factory name, etc. 8.1.2 As needed, the corresponding parts of each product should be fixed with working condition marks. 8.1.2.1 The blower, transmission, and oil pump housing should be fixed with indication marks of the rotor rotation direction. 8.1.2.2 The water and oil inlet and outlet of the valve housing, oil cooler, etc. should be nailed with indication marks of the flow direction. 8.1.2.3 The oil tank should have an oil level indicator, and the highest and lowest oil levels during operation should be marked. 8.1.3 The size specifications and technical requirements of all signs should comply with the provisions of GB/T13306. 8.2 Packaging and transportation
The blower can be packed according to the number, item and number of pieces specified in the packing list only after the mechanical operation test is qualified. 8.2.1
8.2.2 The product can be packed in boxes or simple packages, but it must be guaranteed to be loaded and unloaded multiple times and transported over long distances, and moisture-proof and vibration-proof measures should be taken. 8.2.3 Various instruments and vibration-sensitive wearing parts should be specially packaged and protected with fillers. 8.2.41
The design of the packaging box should comply with the provisions of JB/T6444 and take into account smooth drainage and good ventilation conditions. The design of the packaging box should comply with the relevant regulations for water, rail and other transportation. 8.2.51
The following technical documents shall be attached to the product:8.2.6
Packing list (including attached drawings);
Installation, operation and maintenance instructions for blowers and auxiliary equipment; Product certificate.
8.3 Storage
8.3.1 Each package of the product shall be placed flat and stable when stored, and shall be at least 200~300mm away from the ground.8.3.2 The storage environment shall be protected from rain, sun and water accumulation. 441
JB/T7258-94
8.3.3 During the storage period, the product shall be unpacked and inspected once every six months (three months for the first shipment by ship), and attention shall be paid to: whether the protective layer of each part has lost its protective function, whether the coating has changed color or peeled off, and the protective layer shall be replaced if necessary.b.
Whether the markings of the packaging are peeled off and unclear, and they shall be reprinted if necessary. Additional Notes:
This standard was proposed by the National Technical Committee for Standardization of Fans. This standard is under the jurisdiction of the Shenyang Blower Research Institute. This standard was drafted by the Shaanxi Blower Factory and the Shenyang Blower Factory. The main drafters of this standard are Zhang Piyan, Song Lili, Guo Qingfu, and Chen Mingliang. 442
Whether the packaging mark is eroded and unclear, it should be reprinted if necessary. Additional remarks:
This standard was proposed by the National Technical Committee for Standardization of Fans. This standard is under the jurisdiction of the Shenyang Blower Research Institute. This standard was drafted by the Shaanxi Blower Factory and the Shenyang Blower Factory. The main drafters of this standard are Zhang Piyan, Song Lili, Guo Qingfu, and Chen Mingliang. 442
Whether the packaging mark is eroded and unclear, it should be reprinted if necessary. Additional remarks:
This standard was proposed by the National Technical Committee for Standardization of Fans. This standard is under the jurisdiction of the Shenyang Blower Research Institute. This standard was drafted by the Shaanxi Blower Factory and the Shenyang Blower Factory. The main drafters of this standard are Zhang Piyan, Song Lili, Guo Qingfu, and Chen Mingliang. 442
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.