CN101963211A

CN101963211A - Special planetary speed reducer for continuous casting

Info

Publication number: CN101963211A
Application number: CN 201010509753
Authority: CN
Inventors: 吴声震
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-10-08
Filing date: 2010-10-08
Publication date: 2011-02-02

Abstract

The invention relates to a special planetary speed reducer for continuous casting, belonging to the technical field of steel mill speed reducers. The planetary speed reducer is characterized in that (a) high-speed level cycloid transmission A comprises an input shaft, a cycloid wheel, a needle tooth pin, a needle tooth shell, an eccentric bearing, a W output mechanism and an output shaft; (b) a low-speed level improved quasi planet comprises a sun wheel installed on the output shaft, a planet carrier fixed on the end face of a stand, a quasi planetary wheel, an inner gear ring and two bearings for supporting the output shaft, two shunting gears with the same tooth number Z and modulus m are installed between the planetary wheel and the inner gear ring and are symmetrically arranged on both sides, and a planetary wheel shaft and shunting gear shafts are fixed on the planet carrier. The invention has the advantages that (a) the bearing capacity is 40-45% greater than that of a speed reducer with only three (because basic components are floating, the quantity of the planet wheels is three) planet wheels; (b) the speed reducer has only two-stage speed reduction, short axial dimension, light weight and convenient maintenance; and (c) the cost of the traditional cycloid speed reducer is less than half of that of NGW planetary speed reducers.

Description

Planetary speed reducer specially for continuous casting

[technical field] the present invention relates to steel mill's retarder technical field, a kind of planetary speed reducer specially for continuous casting.

[background technique]

Invention " planetary speed reducer specially for continuous casting " is a level Four NGW planet series connection one (ZL200710068046.7), and because of following improvement is patented: (1) first order sun gear can reverse end for end to assemble; (2) sun gear hollow design at different levels, purpose weight reduction make the sensitivity of floating; (3) planet wheel adopts the SKF full type roller bearing.The subject matter of this invention is:

(A) to float and to only depend on " hollow design " be to be difficult to guarantee " planet wheel all carries " to sun gear, in theory, realizes that the principal element that planet wheel all carries also has: 1. sun gear accuracy of manufacturing; 2. (internal tooth casing connects) toothed coupling maximum deflection angle＜0.5 °; 3. planet wheel shaft is adjacent apart from deviation; 4. planet wheel center circle positional deviation; 5. the accuracy of manufacturing of planet wheel.

(B) slow speed turbine stage is because the basic building block floating load balancing device that adopts sun gear to float, and the theoretical monumental works of many Machine Designs think that all planet wheel can only have three in the Gear Planet Transmission:

(1) " the gear handbook (on) 7-10: in the design, get n usually _p=3, simple and reliable because this stress helps floating load balancing mechanism;

(2) Wang Wenbin " mechanical design handbook " volume 3.17-36 page or leaf: in the statically determinate system, because the basic building block floating load balancing mechanism has principal mode simple in structure, that the good advantage of effect of load balancing mechanism becomes load balancing mechanism, and the basic building block floating load balancing mechanism mainly is applicable to n _p=3 planetary pinion transmission;

(3) the high tooth in domestic south, heavy tooth company, Hangzhou forward gear company, State-owned Changhong Machinery Factory and Kazakhstan five major companies such as fly and have at least 14 routine wind power speed-increasing gearbox patent of invention NGW planet wheels to count n _p=3:

(C) level Four is slowed down, axial dimension length, heaviness, complex structure and inconvenient maintenance.

(D) it is not creative that planet wheel adopts the SKF full type roller bearing, and this is because import SKF full type roller bearing price is very high, can increase maintenance expenses, and import is chronic, can influence on-call maintenance.

[summary of the invention]

The object of the invention be to provide a kind of simple in structure, axial dimension short, in light weight, low cost of manufacture and can on-call maintenance, the planetary speed reducer specially for continuous casting of " cycloid+improvement quasi-planet " double reduction.

The NGW Gear Planet Transmission of cycloid velocity ratio: (a) the single-stage reduction speed ratio is much bigger; (b) the cycloid wheel flexural strength is high, can say not broken teeth; (c) multiple tooth engagement driving is steady, bearing capacity is high; (d) manufacture cost is less than half of NGW planet.The cycloid shortcoming: mechanical efficiency is lower than the NGW planet slightly, but to small-power, is minor issue.

Improve the NGW Gear Planet Transmission that quasi-planet compares: the power dividing number doubles, and calculates to show that bearing capacity improves 40-45%.

[technological scheme] two big technological schemes are as follows:

(1) improves the cycloid impact resistance: (a) partly bury toothing, make gear pin have very high bending ability; (b) all carry ring and make that the cantilever pin becomes freely-supported in the W mechanism, improved crooking ability;

(2) slow speed turbine stage adopts the quasi-planet transmission after improving: described quasi-planet transmission is meant that planet carrier is in stationary state in the NGW planetary mechanism; Quasi-planet transmission after the described improvement is meant between star-wheel there won't be any problem and ring gear two identical shunting gears, the branch fluxion is doubled, thereby improved bearing capacity greatly.

[beneficial effect]

The present invention is contrasted patented invention (200710068046.7), and its novelty, creativeness and practicability are embodied in:

(a) the present invention is than the big 40-45% of bearing capacity that three (owing to be that basic building block floats, thereby the planet wheel number can only be three) planet wheels are only arranged;

(b) the present invention's double reduction only, axial dimension is short, in light weight, easy to maintenance;

(c) price of existing cycloidal reducer is less than half of NGW planetary reducer.

[description of drawings]

Fig. 1. embodiment of the invention structural representation

[embodiment]

Below in conjunction with accompanying drawing the present invention is encyclopaedized:

With reference to Fig. 1. a kind of planetary speed reducer specially for continuous casting is characterized in that: the quasi-planet transmission after being improved by cycloid transmission A series connection forms, and cycloid A is connected on planet carrier (4) end face of quasi-planet, wherein:

(a) level cycloid transmission A comprises input shaft (1), cycloid wheel, gear pin, pin wheel housing, capacity eccentric bearing, W output mechanism and output shaft (2) at a high speed, has very high flexural strength for making the pin tooth, traditional freely supported structure gear pin is changed into partly bury toothing.

(b) quasi-planet after slow speed turbine stage improves comprises the sun gear (3) that is contained on the output shaft (2), be fixed on planet carrier (4) on support (5) end face, uniform there won't be any problem star-wheel (8), be connected on output shaft (7) disk ring gear (12) and in order to two bearings (6) of supporting output shaft (7), bearing (6) is contained in support (5) endoporus, between described planet wheel (8) and the ring gear (12) two tooth number Z, modulus m shunting gear identical, the bilateral symmetry device (10) are arranged, planet wheel shaft (9) is fixed on the planet carrier (4) with shunting gear shaft (11).

Why Gear Planet Transmission is best structural type, is that power dividing is many more, bearing capacity is big more because have coaxial, interior engagement and power dividing three big characteristics.Because shunting gear (10) doubles the branch fluxion, thereby calculating shows that bearing capacity can improve 40-45% than (background technique) patent of invention (ZL200710068046.7);

Embodiment is to explanation of the present invention rather than qualification, and the scheme after any simple transformation all belongs to protection scope of the present invention.

Claims

1. planetary speed reducer specially for continuous casting is characterized in that: the quasi-planet transmission after being improved by cycloid transmission A series connection forms, and cycloid A is connected on planet carrier (4) end face of quasi-planet, wherein:

(a) level cycloid transmission A comprises input shaft (1), cycloid wheel, gear pin, pin wheel housing, capacity eccentric bearing, W output mechanism and output shaft (2) at a high speed;