2K-H Type Suspended Uniform Load Planetary Gear Reducer

1. Overview of 2K-H type suspension load planetary gear reducer

At present, in tunnel excavation at home and abroad, full-face hard rock roadheaders are used for stone excavation, and shields are used for earth excavation. Most of the transmission forms used are planetary gear transmission. Because planetary gear transmission adopts power splitting, several planetary gears bear the load, and adopts reasonable internal converging transmission. Compared with fixed shaft transmission, it has small size, light weight, and light weight. The advantages of large carrying capacity and high efficiency. However, in underground construction, the currently used planetary reducer still feels large in size and weight, which is not convenient for on-site installation and maintenance, so a new structure of planetary gear reducer is designed, that is, a suspended uniform load planetary gear reducer .

1. 1 2K- H type suspension load balance planetary gear reducer transmission principle and composition

1. 1. 1 Transmission principle

Adopt the planetary gear transmission of 2K-H (NCNv) type negative sign mechanism. When the high-speed shaft is driven by the electric motor, it will drive the sun gear to rotate, thus driving the planetary gear to rotate. Because the inner ring gear is fixed, the drive planet carrier is output. In motion, the planetary gear rotates and revolves on the planetary carrier, forming a two-stage, three-stage or multi-stage transmission with the same structure.

1. 1. 2 Composition

It is composed of sun gear Za, planet gear zg, inner ring gear zb and planet carrier H. It is named Qin W type after the sentinel method, and named after the basic component, which is 2K-H type planetary gear transmission.

1. 2 main features of planetary gear reducer

1. 2.1 The combination is ingenious and the structure is novel. It integrates the planet carrier of the previous stage with the sun gear of the latter stage. There is no radial support, and it is in a suspended state. Floating together with the sun gear, the uniform load effect is good, the load unevenness coefficient KP …;;1. 15.

1. 2. 2 Adopt combined welding planet carrier to simplify the structure, simplify the process, and reduce the heavy products.

1. 2. 3 In order to further simplify the structure, and to meet the requirements of equal diameter and equal strength, the final internal gear ring and the previous internal gear ring are made into one body, using the same modulus, simplifying the process and processing requirements, and reducing Connect links and parts. And to use different number of planetary wheels np (np = 3, 4, 5, etc.) and different tooth width b, in order to achieve the same strength requirements.

1. 2. 4 The design index is advanced, the carrying capacity per unit of mass profit is 60 ~SOkN · m/t, and individual can reach 100kN · m/t, while the domestic planetary transmission designed in the past is only 20 30kN · m/t, such as JB1799-76 standard NGW type planetary reducer is like this.

1. 2. 5 The transmission is stable, reliable, low noise and high efficiency, single-stage transmission efficiency ri = 0.98, two-stage transmission ri = 0.96, three-stage transmission r1 = 0.94.

1.2. 6 The sun gear and planetary gear are made of high-quality low-alloy steel, after non-oxidizing carburizing, the tooth hardness is 55 HRC, and the exquisite craftsmanship is adopted to make the gears reach high precision. 42CrlVIo for internal gear can achieve high precision after quenching and tempering and nitriding treatment.

In short, it has a novel structure, advanced design indicators, and innovative and innovative structural concepts. It is an advanced structure in the world today, with great versatility and wide application.

1.3 Current main products

This product is currently produced, as listed in Table 1, and the appearance and installation dimensions are shown in Table 2. The existing products are mainly matched with shields (earth-moving boring machines), that is, they are mainly used for pipe jacking machines and piling in municipal and traffic engineering. Engineering and other equipment can also be used in energy, building materials, metallurgy, mining, light chemical and environmental protection projects.

Table 1: The main parameters of 2K-H type suspension load planetary gear reducer

行 星 齿 轮 减 速 器						电 动 机
型 号	传动比 i	输出转矩 ( kN·m)	输出转速 ( r /min)	质量 ( kg)	输 出 轴 型 式	型 号	功率 ( kW)	转速 ( r / min)
2K – H27	27	0. 95	53. 3	95	50k6 ×85	Y132S – 4	5. 5	1 44 0
2K – H27 A		2. 52	54. 0	160	EXT20z ×3m ×30p ×50	Y160L – 4	15. 0	1 46 0
2K – H120	120	4. 34	8. 0	140	90k6 ×110	Y132M1 – 6	4. 0	96 0
		4. 03	12. 0			Y132S – 4	5. 5	1 44 0
2K – H130	130	11. 74	11. 2	330	120k6 ×150	Y160L – 4	15. 0	146 0
2K – H130 A		14. 38	11. 3			Y180M – 4	18. 5	147 0
2K – H148	148	9. 80	10. 0	250	100k6 ×160	Y160M – 4	11. 0	146 0
2K – H27 8	278	37. 77	3. 5	850	160k6 ×210 单键不通	Y180L – 6	15. 0	97 0
2K – H278 A		55. 40			170m6 ×210 单通键	Y220L2 – 6	22. 0	97 0
2K – H278 B					EXT38z ×4m ×20p ×220
2K – H278 C					170m6 ×210 双通键
2K – H300	300	20. 0	4. 87	400	140k6 ×160 单键不通	Y160M – 4	11. 0	146 0
2K – H300 A		27. 0			140k6 ×160 单通键	Y160L – 4	15. 0	1 46 0
2K – H300 B				460	EXT33z ×4m ×20p ×220
2K – H300 C					140k6 ×160 双通键
2K – H300a	300	10. 0	4. 85	250	100k6 ×125	Y132S – 4	5. 5	1 44 0
2K – H226	226	31. 0	6. 5	460	EXT29z ×5m ×30p ×160	Y180L – 4	22. 0	1 47 0
2K – H343	343	75. 0	4. 31	1280	EXT42z ×4m ×20p ×220	Y225S – 4	37. 0	1 48 0

Table 2: Outline and installation dimensions of planetary gear reducer

型升	L	D	d1 ( k6)	dl ( H7)	d2	d3 。	l l	l2	l3	l4	b1	t1	b2	t2	b3	t3	S1	S2	S 3 ( H7 丿	“1	Il2	I13	J14	L1	坅	伶	D1	D2	D3	D 4 ( h7)	D5 ,	D6 /9）
2K – H27	425	320		38	50 屈		80	85					14	44.5	10	41.3	4 、14	8 X 14		6	16	25	30		130	279	300	2&5	芶 OH7	26.5	295	130
2 K – Fl27A	490	300		42	EXT’20i –   3 m    30l l	。 。	110	75		50					12	45.3	4 ‘ 、 16			6	16						350	300	泌OH7
2K – Hl20	569	扔0		38	90 始		80	110					25	8 1	10	41.3	4 · 14	8 17	2 12	6	15	20	40		159	354	300	26.5	芶 OH7	270	3 L5	210
2 K • lll30	836	510	50		120k6	。 。	80	150			14	44.5	32	109			8 19	8 ” 21	4 16	6	18	30	50	120	230	480	350	300	250117	380	460	280
2K • H130A																											500	460	390H7
2k. Hl48	705	440		42	100k6		110	160					28	90	12	45.3	4 · 19	8 A 18	4, 12	6	16	20	40		220	440	350	300	250H7	360	400	220

型号	L	D	d1 （从）	d1 ( H7)	d2	咋 。	ll	I 2	l3	l 4	bl	勺	b2	伶	b3	l 3	S1	S2	s8 ( H 7)	}/，l	处	h3	妇	L1	L2	L3	D1	D2	D3	D d ( h?)	D5	D 6 ＇fi))
21< – HZ78	10 冗	720	50		l 60k6		85	210			l4	44 . 5	40	14 7			6 X l9	8 X 26	4 X 20	6	20	35	60	120	310	680	500	46,0	380 h7	600	660	360
2K . M 2 7 8 A	1015	720	55		170m6	。	85	210			16	49	40	15 7			6 X 19	8 X 26	4 X 25	6	20	35	60	120	290	600	500	460	890 h7	600	60	360
2K – H 2 78 B	llOO		55		EXT38 z X4M X20p	10019 。		220	60	160	16	49						l2 X 26	2 X 20						290	685			380 h7
21(- 1-1300	8 41	500	45		1 4 0 k6		70	160			14	39.5	36	128			4 X 18	8 X 22	2 X 16	8	16	30	50	105	245	515     650	350	300	250h7	420	460	320
2K – H300 B	976				E X’l’33 乙 X4 m X20 p	80f9 。		220	60	160
2 K – HSOOa	673	380		38	1 0 0k6		8 0	125					28	90	10	4 1 , 3	4 X 14	8 X 18	4 X 14	8	20	30	40		90	225	300	2岱	2.30h7	320	350	320
2 K . H22 6	950	岛 0	45		EX1’2 9 z X5 m X30 p	100 f8	70	160	60	130	l4	39. 5					4 X 18	8 X 22	4 X l6	8	20	30	60	10 0	256	580	350	300	250 h7	4OO	500	3 )0
2 K • H343	1321	泌0	55		EXT4 2 z X4 m X20p	120fS	85	220	60	160	16	49					$ X 18	30 X 22		6	20	35	50	12 0	411	971	5 10	460	汝Oh7	700	820	450

Note:

1. 2 K is 7 A with horizontal base.
2. 2K-H278C has the same dimensions as 2K-H278A except for the output shaft key type.
3. 2K-H300A, 2K- H300C have the same dimensions as 2K-IIBOO except for the output shaft key type.