JB/T 8548-1997 Technical requirements for power shift transmissions for construction machinery
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T 8548--1997
Technical Conditions for Power Shift Transmissions for Engineering Machinery
Published on April 15, 1997
Ministry of Machinery Industry of the People's Republic of China
Implementation on January 1, 1998
JE/T854R1997
This note is revised on the basis of Technical Conditions for Power Shift Transmissions for Engineering Machinery of 2BJ93 (588T). The revision of this standard is reserved. This standard is applicable to the production of my country in actual combat. In order to make the standard more advanced, reasonable and comprehensive, the technical information of relevant foreign transmissions is included. The relevant standard boxes are in accordance with the production and use conditions of power shift transmissions in the field of engineering machinery, and the test environment inspection part of the transmission is added, and the quality assurance requirements for the transmission are adjusted. This standard will take effect from the month, and will replace ZBJ83UU5-8. This standard is proposed and managed by the Engineering Machinery Standards and Non-chemical Technology Registration Committee of the Ministry of Machinery Industry. The drafting unit of this standard is: Tianchong Engineering Machinery Research Institute of the Ministry of Machinery Industry. The main drafter is Shi Shuhua.
1 Scope
Machinery Industry Standards of the People's Republic of China
Engineering Machinery Power Shift Transmission
Technical Parts
JB/I 85481997
215183 588
This standard specifies the requirements for the small or large dynamic variable speed changer of the machine, including the test, acceptance, standard exemption, package, operation, storage and warranty period.
This standard is applicable to the power transmission below 30kW (hereinafter referred to as the transmission above 30kW). The standard contains the text of the six series of standards, which are quoted in this standard and constitute the provisions of the standard. This standard is effective when it is issued. All international standards will be revised. The standard section of this standard is used by all parties to produce the latest version of the standard. :1144-87
Gn/T 1133-1996
GB/ 11A4--H096
G1359.489
3K38—8?
GBT 3478. [--3472. I!: 95
G3 1GCS5--88
GB/I 13506$!
|JB/T $936 --5]
J/T :S7-91
1B/TS3S!
JBS/T5544—U1
JB/T 5945-91
JI5/7 5947...91
IB/T 5100792
JB/T 511=7 94
J/T 51148-94
JB/T 53392 -4
ZT+ J19 219- 29
ZBJ8500187
3 Technical requirements
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JB/L8548-1997
3! .! The converter shall be manufactured in accordance with the product samples and technical documents approved in the specified order and in accordance with the provisions of this standard. When there are special requirements, the manufacturer shall be selected.
3.1.2 The imported products shall be made according to the imported samples and technical documents, and shall comply with the provisions of this standard. 3.1 Gear
3.2. The gear material shall be 2NiCMoH, 20CrMrTi, 23CrMnMo, 3CMV, 4Cr2CrM5. When there are special requirements for the supplied materials, the provisions of "Supply Technical Agreement" shall be implemented. Other materials shall be carefully selected under the premise of ensuring the bearing capacity and performance of the gear.
3.2.2 The accuracy level of the four-wheel shall comply with the requirements of the drawing and shall not exceed the 8th level specified in GB1095. In the type transmission, the special level of the internal gear drawing can be one level lower than the corresponding sun gear or planet gear accuracy level. 3.2.3 The effective carbonization depth of low alloy steel should be consistent with the metallographic composition of gears:) The concave surface thickness should not be less than HRC: The effective hardened layer depth is recommended to be 12~1.25 times of the modulus W. The gear core should be 33~45HR when the modulus is less than 8. The gear core hardness should be 39-4511RC when the modulus is greater than 3: || tt||) When the gear tooth efficiency is 3, the curvature of the gear surface can be reduced by 23HRC, but it should not be less than 56HRC:
The shaft diameter, hole diameter and end face hardness of the small gear with friction pair should not be less than S8HRC. The hardness of the other surfaces should not be less than 45HRC. The heat treatment requirements of the reverse gingival gear should comply with the provisions of JB/T54-914.3.5 except for those specified in the 4th standard.
The effective grinding layer depth is not more than 5HR: the test position of the 2nd gear center is at the intersection of the tooth center line and the fracture surface. 3.2.4 Medium carbon alloy gear reduction metal structure! The following shall be met:) The combined gear tooth hardness is 50~5HRb; the gear tooth surface hardness of the planetary transmission shall not be less than 4UHR. The effective hardness of the inner gear surface when the effective hardness layer depth is greater than U.23rl shall be 248302HI5
) Induction heating parts shall comply with the provisions of 4.3.1 of JB/591191. 32.5 The gear tooth surface light precision K value of the inner gear ring when the gear is grade 8 shall not be less than 1.5um, and the inner gear ring tooth surface roughness shall not be less than 3.2um.
3.2.6 When the gear hole diameter is used as the bearing diagram, its surface roughness shall not be less than 53HRC, the surface roughness R value shall not be less than 0.m, and the degree tolerance and degree tolerance shall not be less than grade 1.
Note: the shapes and sizes specified in this standard shall comply with the specifications of GB/T1182 and GB/T11B. 3.2.7 The runout tolerance of the step wheel reference end face shall not be less than grade 7. 3.3 Shaft exposed parts
3.3.1 The recommended materials are 20CrM1i, 20CrMrMo, 20r, 20.4cC:.4cc-MnMo and 12rMo steel. The material selection and matching requirements are: under the premise of the performance index, the material can be selected, 3.3.2 The tolerance grade and fit of the involute chain should comply with the provisions of (B/T3473, and the accuracy and fit of the rectangular chain should comply with the provisions of GH1141.
3.3.3 The carburized depth of the button shaft is 0.15-~0.3 times the number of changes, the shaft diameter, the surface hardness of the outer milling (carbon inter-) is not less than 55HRC, and the matching inner milling carbon (carbon effect surface hardness is not less than 5SHRC: heat treatment requirements are JB/T5!44-4.2. 5.
3.3.4 The shaft of the alloy pin shall be treated by induction annealing. Before annealing, it shall be normalized or annealed. After annealing, the surface hardness of the shaft diameter and end face of the thick pair shall be 5C-~5AHRC. The surface hardness of the tooth shall not be less than 50FHRC. The induction heat annealing parts shall comply with the provisions of JB/T2
5544-·91.3.
J/T 8548-..1997
3.3.5. The surface visibility of the planetary gear shaft in the quantitative seller's shift transmission shall not be lower than 60HRC, the surface roughness shall not be greater than FC.10m, the roundness and stability grade shall not be lower than Grade 6. 3.3. The parts shall be smooth and clean on the surface. There shall be no burrs or hairs; no spots on the surface are allowed; the oil holes shall be unobstructed; the rails of the installation bearings shall not have dents, small waves, damage or protrusions; 3.3.7. The parts shall be deeply inspected by the method of damage detection. If the magnetic particle detection method is used for quick inspection, the danger limit chain shall be inspected. 3.4 Energy base plate
3.4.1 The friction performance of the contact plate shall comply with the provisions of Table 1. Table 1
Energy load C
Energy efficiency level>
0.n6--0.08
Static loss value
3.4.2 The technical requirements, test and inspection rules for friction plates shall comply with the provisions of BJ1519.
3.4.3Energy efficiency! The spline only uses 30% spline tolerance grade (/ 8475.1 6 ~ 7 provisions, the special force angle of the spline should be in accordance with the core B1GC95 when the square, the tooth system should be between 0.25 ~ ~ 3.35mm, 3.4.4 The shape tolerance of the spring piece should comply with the provisions of Table 2
Thickness of the outer diameter of the spline
Parallelism
Degree of freedom
3.4.5 The core plate and the friction piece should be connected to the user, and no other blocks or parts are allowed to be removed. 3.4.6 The magnetic flux density is 0.C5T3.4. The appearance requirements should meet,
a) The friction piece does not have any correction, and the use of anti-expansion should not affect the performance of the friction piece; 1) Replacement The sheet is not allowed to have a diameter larger than +1.5mm, and the thick sheet is not allowed to be broken. The distance between the edge and the root should be less than 1.5mm. d) The defect detection sheet is not allowed to have a bottom edge, and the core board is not allowed to be missing; e) The sheet should have a corner, clean the oil, and the surface roughness R should not be greater than 6. 3.5.1 The material of the material is 60Si2M and 65Mn. The performance and accuracy of the two-way dry spring should meet the requirements of 1939.4. The product quality before the operation of the spring meets the requirements of 1B/T53394. 3.5.2 Under the condition of torsion of 130, the negative force is 150N from 0 and then from 150N. After 1×10* times of the test, the elastic force should be less than 25N.
3.6. 】For the inverter body, oil proof body and other requirements, it is recommended to use mechanical properties lower than HT20C. 3.6.2 The iron parts shall comply with IB/T5937. 3.6.3 When the transmission parts such as the coupling plate in the planetary low-power transmission system are used, the mechanical properties of the parts shall not be lower than those specified in JB/T553. The mechanical properties of the parts shall not be lower than those specified in JB/T5035. ZG310-571. 3.7 Machining requirements
3.7.1 The speed reducer body shall comply with:
IR/T8548
a The center ratio tolerance of the shaft hole related to the gear shall comply with the specifications of B100U5 for the center difference: b ) The tolerance of the shell contact should not be less than 10 grades! ) The tolerance of the parallel axis centerline should not be less than 10 grades: The tolerance of the axis hole centerline to the reference should not be less than 10 grades: The tolerance of the distance between the same auxiliary centerline should not be less than 10 grades. For the vertical lines with the same requirements, the straightness tolerance should be less than 6 grades. The tolerance of the axis hole centerline should not be less than 6 grades. Of course: 1) The hole with higher accuracy level should be marked with the grid and column tolerance. 3.7.7 The frame should meet the following requirements:
a) The center deviation can be calculated according to formula (1):
In the formula: ... Center deviation n
Center distance na.
) The total tolerance of the planetary housing hole can be calculated or calculated when the planetary hole is the center distance
When the number of planetary holes is greater than 3
S -1. 7f.
Wu Zhong:
The tolerance of each planetary gear hole, mn. ) The actual difference of each wheel shaft hole centerline parallel to the standard auxiliary line should not be less than (the tolerance of the small hanger should be the small planetary gear shaft hole tolerance) The planetary frame processing piece should be subjected to static balance test. Do not assume the standard of Table 3. Table 3 Unbalance of the rack
Center is positive and mn
Unbalance, for G-1
3.7.3 Light plug oil should be station:
126: -- 18G
) The surface of the surface of the surface should not be less than ten 7 levels, the table girl is super, the value is not big! 3.7.4 The position tolerance of machine parts shall be in accordance with the provisions of GB13319, and the rest shall be in accordance with the provisions of J/T59.36. 3.8 Machine processing requirements
3.8, 1. Parts with oil passages, such as cylinder blocks, pistons and control bodies, shall be subjected to pressure resistance tests, and the test pressure shall meet the requirements.
3.8.2 The sand and core sand of the non-cut surface of the casting shall be clean and well coated with anti-paint. 3.8.3 The coating surface of the parts shall be evenly coated. There shall be no shearing, missing coating, etc. 3.8.4 The oil-retaining surface of the casting shall be cleaned with a special cleaner to keep it clean. 3.8.5 The clutch plate, spring lock plate and other corresponding parts shall be treated with blood to prevent rust. 3.9 Assembly
3.9.1 New parts shall be inspected and meet the requirements of the drawings. The discarded parts shall be sent for comparison only after they have been certified. 3.9.2 All parts shall be cleaned before assembly. The oil passages shall be unobstructed and free of dirt. 3.9.3 Adjust the spacing of the roller bearings to 0.1~C.:3mm. 3.9.1 The assembly of the transmission shall comply with the technical requirements marked on the national standard and the provisions of IB/T5045. 3.9.5 Before assembling the transmission, the following inspections shall be carried out: a) Correctness of assembly; b) Appearance or disc.
3.9, after the transmission is matched, it is necessary to carry out a test adjustment. Check the matching quality. Before the test, the oil store at the high end should be adjusted to the design range + test method
+.! Test
, test according to 2BJ55001 to complete the inspection items as follows: a) Whether the transmission is connected in each gear, and whether there is any impact or abnormal belt free production: b) Whether each gear has a fluid phenomenon:
) Whether each high gear can be connected smoothly, and there is no phenomenon. When the clutch is disengaged, whether there is any belt phenomenon:
d) Test the transmission code or loss:
5) Check the transmission working pressure;
4.2 Efficiency test
When the newly designed transmission is tested or the quality test is carried out, it should be tested according to the provisions of BJB5001. In addition to checking the items of 5 tests, the test should be carried out according to the requirements of 4.2n) 4.2h) 4.3 and 4.2e>.
a! Transmission transmission efficiency:
) can be certified:
e) The speed is reliable.
4.3 Performance test
After the inverter passes the factory test: send it to the following places for a test of not less than 100h: > Use the dynamic speed changer in accordance with the provisions of JD/T51148 or JB/T51147: Carry out specific tests on the real rack, strictly follow the quality supervision and inspection center of mechanical products, report the engineering safety plan, and the relevant technical documents for inspection. Only after passing the inspection can it be released from the factory. The product will be certified.
JB/T:548-1997
5.2 The sampling inspection is carried out according to the one-time sampling plan specified in CB2828. The qualified quality plate water half AQL is G.5. The inspection level is the highest inspection level 1. The size of the wood is determined by the manufacturer according to the production batch (B2828-87 Table 2) and the inspection date is determined by negotiation between the two parties. The actual inspection date is selected by the manufacturer according to the actual requirements or determined by the supplier and the actual situation. 6. Packaging transportation and storage
6.1 The transmission should have a label. The label size and installation conditions should comply with the provisions of GBT13306. The label should include: a) manufacturer name, b) product name, d) product model, e) maximum input speed, r/min, and product number. 2 The packaging of the transmission should comply with the specifications of JR/T6947 to ensure that the new and old parts and products are not returned. 6.3 The self-made transmission of the main engine may not be packaged, but it should be installed before installation. 6.4 Other connectors made by the engine manufacturer should also have a certificate issued by the relevant testing department before installation. The working surface and the extension shaft of the transmission are not allowed to be damaged, corroded or stepped during transportation. 6.5
The packaged transmission should be stored in a dry, ventilated and non-corrosive warehouse. .G
In order to ensure the quality, the manufacturer shall comply with the product use and maintenance regulations. The product shall be used within 12 hours from the date of shipment from the manufacturer (based on the date of the invoice) and within 2000 hours. If the product is damaged or does not work properly, the manufacturer will repair or replace it free of charge.
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