CN102312956B - Bevel-closed planetary high-transmission-ratio speed reducer of ore mill - Google Patents

Abstract

The invention relates to the technical field of planetary reduction, and relates to a bevel gear-enclosed planetary large transmission ratio reducer for mining mills. It is characterized in that: the input bevel gear pair includes the driving wheel and the driven wheel in the bevel gearbox, and the bevel gearbox is connected to the input end of the casing; the planet carrier in the high-speed planetary transmission is connected to the second sun gear shaft; the differential planet carrier in the closed planet It is connected with the quasi-sun gear in one piece, and the empty sleeve is outside the differential second sun gear shaft. The inner hole of the quasi-planet carrier is tightly fitted with the outer circle of the inner flange of the casing, and the output end of the inner gear cylinder is connected with the output shaft. The other end is connected by the method of The blue tube and the inner hole of the flange tube are supported on the outer circle of the quasi-planet carrier with two bearings. There is a sealing ring between the outer circle of the flange cylinder and the inner hole of the machine base. Beneficial effects: (1) the bearing capacity is increased by 50-60%; (2) the axial length is 25-35% shorter and 20-30% lighter; (3) the seal is reliable and the service life is long; The number is equal, easy to disassemble and assemble.

Description

Mining mill bevel gear-enclosed planetary large transmission ratio reducer

technical field

The invention relates to the technical field of planetary reduction, and relates to a bevel gear-enclosed planetary large transmission ratio reducer for mining mills.

Background technology CITIC Heavy Industry Machinery Co., Ltd., Luoyang Mining Machinery Design and Research Institute "Conical Planetary Large Transmission Ratio Reducer for Mining Mill Slow Drive Transmission" 200810231115.8 to meet the needs of mining mill slow drive work. The idea of the planetary part of the invention is related to ①Cheng Daxian's "Mechanical Design Manual" Volume 3. Figure 14-5-31; ②Zhu Xiaolu's "Gear Transmission Design Manual" Figure 7-23; ③"Suspension Balanced Planetary Gear Reducer" 95243413 .X; ④ Figure 8-4 of Zhang Zhan's "Planetary Differential Transmission Device"; In addition, the invention claims that the transmission efficiency is ≥97%, but Zhu Xiaolu's "Gear Transmission Design Manual" 1030 pages, "Mechanical Transmission Device Selection Manual" 393 pages; Zhang Zhan "Planetary Differential Transmission Device" 310 pages: single stage (NAD) η=0.98, so the overall efficiency should be: η=0.98 ⁴ =0.922.

Summary of the invention The object of the present invention is to provide a bevel gear-enclosed planetary large transmission ratio reducer with a 25-35% shorter axial dimension for mining mills.

Technical solution (A) The input stage is a bevel gear pair, which is composed of a driving bevel gear and a driven bevel gear;

(B) The high-speed stage includes the first sun gear shaft, the first planet carrier, the first planetary gear, the first planetary gear shaft and the first ring gear, the casing and the end cover, and the first ring gear is connected to the input end of the casing The first planet carrier output shaft is supported by two bearings in the inner hole of the inner flange of the casing, and the inner spline of the shaft end of the first planet carrier output shaft is connected to the outer spline of the second sun gear shaft;

(C) The differential components in the closed planet include the second sun gear shaft, the second planet carrier, the second planetary gear, the second planetary gear shaft and the ring gear A, and the quasi-planetary components include the quasi-sun gear, quasi-planetary carrier, and quasi-planetary gear , the quasi-planetary shaft and the inner ring gear B, the second planetary carrier and the quasi-sun gear are connected as a whole, and the hollow sleeve is outside the second sun gear shaft. The output end of the gear cylinder is connected to the output shaft, and the other end is connected to the cylinder with flange, and the inner hole of the cylinder with flange is supported on the outer circle of the quasi-planet carrier by two bearings. The ring gear A and the ring gear B have the same tooth number z and the same modulus m. Between the outer circle of the cylinder and the inner hole of the casing are the Cheshi dustproof ring and the rotary sealing ring.

Beneficial effects: Compared with the invention patent 200810231115.6, its creativity lies in:

(1) The number of quasi-planetary gears n _p = 6, carrying 76% of the torque, which is equivalent to an eight-split flow, so the carrying capacity is 50-60% higher than that of a four-split flow; (2) The axial direction is 25-35% shorter and 20-30% lighter %; (3) Che's sealing ring has reliable sealing and long service life;

(4) The tooth number z and modulus m of the second inner ring gear are equal, so it is easy to disassemble and assemble.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1, a schematic structural diagram of an embodiment of the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below in conjunction with the accompanying drawings:

Refer to Figure 1. A bevel gear-enclosed planetary large transmission ratio reducer for mining mills is composed of an input-stage bevel gear pair, a high-speed NGW planetary transmission and a low-speed closed planetary transmission. The closed planet includes differential and quasi-planetary Two parts, characterized in that:

(A) The bevel gear pair includes a driving wheel 18 installed in a bevel gear box 20 and a driven wheel 19 mounted on the shaft of the first sun gear 22, and the bevel gear box 20 is connected to the input end face of the support 3;

(B) The NGW planetary transmission includes the first sun gear shaft 22, the first planet carrier 2, the first planetary gear 17, the first planetary gear shaft 16, the first ring gear 1 and the base 3, and the first sun gear shaft 22 Installed in the inner hole of the bevel gear box 20, the first inner ring gear 1 is connected to the inner hole of the input end of the base 3, and the output shaft of the first planet carrier 2 is supported on the inner flange of the base 3 by two bearings In the inner hole, the inner spline of the output shaft end of the first planet carrier 2 is connected with the outer spline of the second sun gear shaft 9;

(C) The differential components in the closed planetary transmission include the second sun gear shaft 9, the second planet carrier 12, the second planetary gear 11, the second planetary gear shaft 10 and the ring gear A in the inner gear cylinder 7, and the quasi-planetary components include The quasi-sun gear 13, the quasi-planetary carrier 6, the quasi-planetary gear 14, the quasi-planetary shaft 15 and the ring gear B in the inner gear cylinder 7, the inner gears A and B are processed by the inner gear cylinder 7, and the second The planetary carrier 12 is connected with the quasi-sun gear 13 and is sleeved outside the second sun gear shaft 9. The inner hole of the quasi-planetary carrier 6 is closely matched with the outer circle of the inner flange of the machine base 3. The inner gear cylinder 7. The output end is connected with the output shaft 8 disk, and the other end is connected with the flange cylinder 21. The inner hole of the flange cylinder 21 is supported on the outer circle of the quasi-planetary carrier 6 by two bearings 5. The flange cylinder 21 There are two sealing rings 4 on the outer circle and the inner hole of the machine base 3, which is further characterized in that the sealing ring 4 is a combined dust-proof ring of Che's CZF-I type and a rotating sealing ring of Che's TB3.

The TB3 seal is composed of a thin-lip toothed slip ring + O-ring. The contact between the tip of the slip ring and the rotating surface is close to line contact to reduce frictional heat during high-speed rotation. The thin lip of the slip ring has low rigidity, and the O-ring tightens the thin lip of the slip ring on the sliding surface. The thickness of the oil film on the sliding surface is 0.001-0.0025, so that it will not be scraped into drops (leakage); the elasticity of the O-ring makes the line contact the sealing surface wear Automatic compensation; CZF dust-proof ring is made of low-friction, high-wear-resistant, high-strength polymer into a rectangular cross-section, with a tight and tight joint, relying on the O-ring outside the ring to automatically compensate, and stick to the dust-proof surface without gaps. One of the main reasons for the short service life of the existing mine mill reducer is the failure of the seal. The Che's seal is found in Cheng Daxian's "Mechanical Design Manual" volume 3.10-300 pages.

The bevel gear-enclosed planetary large transmission ratio reducer for mining mills is characterized in that: the number of teeth z of the inner ring gear A and the inner ring gear B in the inner gear cylinder 7 are equal, and the modulus m is equal, so the machining process performance is good , Easy disassembly and assembly.

Among the differential parts, there are three planetary gears 17, carrying 24% torque, and six quasi-planetary gears 14, carrying 76% torque, which is equivalent to an eight-split flow, so the carrying capacity is 50-60% higher than that of the background art 200810231115.6 four-split flow. The calculation results are as follows:

Claims (1)

1. ore deposit grinding machine cone tooth-closed planetary speed reducer with high transmission ratio, is made up of bevel gear pair, NGW Gear Planet Transmission part and closed planetary driving component, and described closed planetary driving component comprises differential with quasi-planet two parts, it is characterized in that:

Described bevel gear pair comprises and is contained in drive bevel gear (18) in tapered gearbox (20) and driven wheel of differential (19);

Described NGW Gear Planet Transmission part comprises sun wheel shaft (22), planet carrier (2), planet wheel (17), planet wheel shaft (16), first ring gear (1) and support (3), described sun wheel shaft (22) is contained in tapered gearbox (20) endoporus, described tapered gearbox (20) is connected on support (3) input end end face, described sun wheel shaft (22) axle stretch end connects driven wheel of differential (19), described first ring gear (1) is connected in support (3) input end endoporus, described planet carrier (2) output shaft is bearing in two bearings in the endoporus of support (3) inward flange, described planet carrier (2) output shaft end internal spline connects differential sun wheel shaft (9) external splines,

Described differential component comprises differential sun wheel shaft (9), differential planetary frame (12), differential planetary gear train (11), second ring gear (A) in differential planetary wheel shaft (10) and internal tooth cylinder (7), quasi-planet parts comprise accurate sun gear (13), there won't be any problem carrier (6), there won't be any problem star-wheel (14), 3rd ring gear (B) in quasi-planet wheel shaft (15) and internal tooth cylinder (7), described second, three ring gear (A, B) obtained by internal tooth cylinder (7) processing, in described internal tooth cylinder (7) second, three ring gear (A, B) number of teeth z is equal, modulus m is equal, described differential planetary frame (12) and accurate sun gear (13) are integrally togather empty set outside differential sun wheel shaft (9), the cylindrical close-fitting of described there won't be any problem carrier (6) endoporus and support (3) inward flange is integrally togather, described internal tooth cylinder (7) output terminal connects with output shaft (8) disk, the other end connecting flange cylinder (21), described flange cylinder (21) endoporus is bearing on the cylindrical of there won't be any problem carrier (6) with two bearings (5), described flange cylinder (21) cylindrical and support (3) endoporus have two seal rings (4),

Described two seal rings (4) are Che Shi CZF-I type combination dust ring and Che Shi TB3 rotating seal ring.