This standard provides the design and calculation guidelines for the crawler mechanism of a cantilevered tunnel boring machine (hereinafter referred to as crawler mechanism). This standard applies to the design of crawler mechanisms of cantilevered tunnel boring machines. MT/T 910-2002 Design Guidelines for Crawler Mechanisms of Cantilevered Tunnel Boring Machines MT/T910-2002 Standard download decompression password: www.bzxz.net

%73.100.1C
Reserve number: 103222002
Coal Industry Standard of the People's Republic of China
N1T:T 910 2002
Hom-lype raadhealer-The esign guidelines Forcrawler meelanism
2002-04-08 Carbon cloth
National Economic and Trade Commission
20C2-09-01 implementation
MT/T 910--2002
This standard gives the calculation formulas for the rate gravity and input power of the crawler mechanism of the cantilevered roadheader, and proposes the design and measurement of weak driving wheels, supporting wheels and guide wheels.
This standard specifies the appendix of the standard. This standard is published by China Coal Industry Association. This standard is issued by the Standardization Technical Committee of Coal Industry Special Equipment. The main test section is: Taikang Branch of China Coal Research Institute, Shangsheng Branch of China Coal Research Institute. The drafters of this standard are: Ma Bimi, Ji Yining, Zhu Zujin, Liu Zuping, Jue Jundao. This standard is interpreted by the Standardization Technical Committee of Coal Industry Special Equipment for Coal Mining Machinery Branch. 1 Scope
Coal Industry Standard of the People's Republic of China
Guidelines for the Design of Crawler Travel Mechanism of Cantilevered Tunnel Header Buom-type ronrtheader-The design for crawlermcchanism
MT/T 910—20C2bzxZ.net
This standard gives the calculation list of crawler travel mechanism of cantilevered tunnel boring machine (hereinafter referred to as crawler machine). This standard applies to the design of the mechanism for the automatic insertion of the machine. 2. Construction
This standard adopts the following definitions.
2.1i[or
The effective tension provided to the belt chain by the drive wheel of the drive device. 2.2 Trackadsasion
The resistance value of the traction force when the belt and the ground (or plate) support surface are relatively displaced. 2.3 Multiplication
The weight of the belt under the belt is raised. 2.4 Retsol
The measurement of the tension and the strength applied to the cylinder to keep the belt stable. 3. The special number in Table 1 is not allowed to be used. The National Economic and Trade Commission approved the ground in 200204-08. The light weight of Wangqi is the most limited belt travel machine. The gravity of the machine is the same as the ground. The drag coefficient of the belt and the surface is the same. The drag coefficient of the mud precipitator is the same. The length of the single crawler walking pool is the center distance of the two belts. The distance between the center of the good condition pick-up and the center of the ground contact of the standard belt walking mechanism is the distance from the center of the storage center of the meat in 2002·09-01. The structural type of the belt walking mechanism is MT/T. 910-2002
Continued table:
Single-sided walking machine holding the weight of the machine's single-sided development of the walking mechanism of the input power
Australia's belt travel machine and the work of the movement of the machine, that is,
The quick-action efficiency of the belt
The efficiency of the dynamic device of the mutual advancer
The new efficiency of the belt
The tension of the installation
The blue fire per unit length
The guide wheel and the weak The center of the driving wheel and the crawler walking mechanism include left and right walking mechanisms, and are symmetrical with the longitudinal center line of the machine. The single-sided belt running mechanism includes the pulley tensioning device, the support, the support, the general chain, the driving device and other parts, as shown in Figure 1. M
1-inch light: 2-tightening device 3-belt rate 1-wheel 5-winding belt 6-driving device Figure 1 Walking mechanism
5-belt grounding length recommended range pressure
L :: (1. 6 ~ 2.2)5
6Calculation and determination of average grounding pressure
01×10
.........
In the design, the grounding pressure of the belt is not allowed to show a triangular distribution, and zero pressure should not appear on the normal grounding length. The center of gravity should be within the non-break core of the belt connection. 7 The recommended range of the center distance between two belts
R=(3.6~4.515
8 The range of walking speed
The working speed is 0.03~0.083m/s, and the mobilization speed is 0.167--c.250m/9.2
9 The recommended range of tensioning stroke
is 0.75~~-.25 belt pitches
The average determination of the walking traction of a single belt is MT/T 910—2C02
The maximum traction of the belt walking mechanism should meet the requirements of the machine working on the large design, climbing and turning on the horizontal road. The maximum traction should be less than the traction of the belt on the horizontal road. Under normal circumstances, the belt walking signal is not carried out at the same time as the machine operation and loading. When the machine turns in place, the traction of the single-sided belt is the maximum. The calculation of the traction force of the single-sided belt walking structure is based on the specific force = R+(1
R, = GT
Where: the value range is 0.08~C.:3
2 the value range is 0.8~-:.3.
In the case of a relatively large control, take it.
11 Determination of input power of single-sided crawler mechanism P
In the formula: the total value is 0.8~92 when there is a support wheel, and 1.1-0.74 when there is no support wheel. 12
The force of the belt on the ground must be greater than or equal to the sum of the forces, but should be less than or equal to the adhesion between the single-sided track and the ground.
The coefficient of tension should be selected according to Table 2.
Ground (joint plate)
Stone pavement
Sand pavement
Sand pavement
Sand pavement
Sand pavement
Prestressing pretension calculation and determination
The symbols in the formula are shown in Figure 2.
0.6~-0. 8
0. 5 center. 3
ground (or bottom) point condition
ten eggplant soil
ten sandy soil mirror surface
water chicken surface
coal shop board
3, use-~ (h 7
1 design rules for dynamic sprocket
MT/T 910—2002
1-Inner wheel: 2-Limiting wheel
Symbol diagram in Figure 2
The calculation load of the driving wheel of the medical device is the rate of gravity of the single-speed belt travel mechanism, and generally one tooth is used for transmission. The sprocket teeth should be checked for bending and tension strength, etc. 15 Design principles of supporting wheels
Each supporting wheel seat can bear a control rate load of not less than 5 heads of the weak machine. 16 Design principles of guide wheels
The guide wheel should be able to withstand a radial surface load of not less than two estimated traction forces. 17 Calculation examples
For the calculation examples of belt travel mechanisms, see Appendix A of the standard). A Known explosive parts
MT/T910—2002
Appendix A
(Appendix of the standard)
Base cover type insertion machine belt travel mechanism design calculation example Remote head force: center = 30kN:
》Single over-building belt walking mechanism borne by the tunnel boring machine ear force center, G
) Single-side eye belt walking mechanism ground length: = 2560mm; d) The center range of the two sleeping belts, 8 = 145Cmm15UkN :
) The eccentric connection between the center of gravity of the torque machine and the fixed mechanism: n: 40mL Dynamic resistance coefficient (take the larger value) 1=0.1;
g) Steering force coefficient (take the larger value: =1.0: b> The working speed of the walking structure: V=[.5T/s1) The transmission efficiency of the thick belt running mechanism (without support wheels): =.71: j) The rotation efficiency of the speed reducer: -0.90; k) Appendix No. 1.Ur
! The center distance between the guide wheel and the driving wheel is e295mm) and the unit of the belt energy is: 9=1.33×10-k/mm: -55mm.
A2 The calculation of the rate of the single-sided crawler walking mechanism is in grams (4)(5);
T, -R, ++
1. × 30 × 2560!
=15Q × U. 1 +
4 X 1450
=122.8(kN)
A3 The withdrawal power of the single-sided guide mechanism is calculated according to formula (5)
P,-TV- 122 x×a 05
A4 The potential of the track on the ground is checked and calculated
0.71 X 0.90
T, =123. (kN)
4 × 4a
= 9. srkw)
C:P=150 × 1.0 =150(kN)
≤satisfies formula (7): The output is D.6kW, which can meet the working push requirements of the single-sided guide mechanism. 5
Calculation of pretension of tensioning device
Technical method):
MT/T910—2002
1. 33 × 10 *× 2950*
4 x 50
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.