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Shenyang Shenke Power Machinery Co,. Ltd.

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NUPEX Combination Flexible Coupling

The NUPEX combination elastomeric coupling is a high-performance coupling developed and launched onto the market in 2000 by Schenck Power specifically for the characteristics of variable-frequency drive units. After successful application at the Jinxi Petrochemical Plant, more than 300 units have been installed to date, all operating smoothly and delivering excellent results.

Detailed introduction

Product Features
The NUPEX combination flexible coupling is a high-performance coupling developed and launched onto the market in 2000 by Schenck Power specifically for the characteristics of variable-frequency drive units. After successful application at the Jinxi Petrochemical Plant, more than 300 units have been installed to date, all operating smoothly and delivering excellent performance. Its structural features are as follows:
1. Supported by new U.S. technology, featuring an NUP+ diaphragm combination design.
2. Finite element equal-strength design—lighter, more convenient, and safer.
3. Automatic self-aligning feature can accommodate misalignment in all directions of the unit, requiring only rough alignment during installation.
4. The polyurethane rubber sleeve features pressure resistance, self-lubrication, and permanent elasticity; the three stiffness levels are selected based on torque calculation results.
5. Built-in joint bearing provides radial support up to 5 tons, completely eliminating the need for intermediate radial supports.
6. The deflection stiffness of the intermediate shaft can be adjusted to avoid critical rotational speeds and improve the dynamic characteristics of the unit’s rotor.
7. Fully absorbs variable-frequency harmonic impacts, provides shock absorption, and operates silently.
8.3 DH phase magnetic strip and counterweight screw holes allow for correction of shaft system imbalance.

Figure 3.2 NUPEX Composite Elastic Coupling

Table 3-2: Technical Parameters and Main Dimensions of the NUPEX Composite Elastic Coupling

Model	Rated torque Mr. N.m	Peak torque City of Tp N.m	Permissible Rotational Speed revolutions per minute	D mm	d Max mm	S mm	L mm	Moment of inertia Kg·m²	Torsional stiffness MNm/rad	Misalignment absorption capability
Model	Rated torque Mr. N.m	Peak torque City of Tp N.m	Permissible Rotational Speed revolutions per minute	D mm	d Max mm	S mm	L mm	Moment of inertia Kg·m²	Torsional stiffness MNm/rad	Axial mm	Angular direction °
NUPEX162	920	1800	4300	162	75	4	60	0.132	0.02	4	1.5
NUPEX178	1000	2100	3800	178	80	4	70	0.14	0.036	4	1.5
NUPEX198	1200	2300	3400	198	90	4	80	0.148	0.054	5	1.5
NUPEX228	1800	3600	3000	228	100	5	90	0.159	0.114	5	1.5
NUPEX252	2600	5200	2700	252	120	5	100	0.17	0.19	6	1.8
NUPEX285	4500	9000	2400	285	130	5	110	0.179	0.35	6	1.8
NUPEX320	5500	11000	2100	320	140	5	125	0.19	0.46	6	1.8
NUPEX360	9000	18000	1900	360	160	5	140	0.2	0.13	7	1.8
NUPEX400	13000	27000	1700	400	170	6	160	0.212	1.9	7	2.5
NUPEX450	22000	44000	1500	450	195	6	180	0.22	3.6	7	2.5
NUPEX500	27000	54000	1350	500	220	6	200	0.23	5.8	8	2.5
NUPEX560	42000	84000	1200	560	235	6	220	0.24	10.4	8	2.5
NUPEX630	48000	95000	1050	630	250	6	240	0.25	16	8	2.5
NUPEX710	70000	142000	950	710	270	6	260	0.26	30	8	3.0
NUPEX800	81000	162000	850	800	295	6	290	0.27	47	10	3.0
NUPEX900	123000	245000	750	900	320	8	320	0.28	85	10	3.0
NUPEX1000	140000	280000	680	1000	350	8	350	0.29	125	10	3.0

Note: The shaft hole length L is a recommended value; users may specify their own values.
　　The values for the moment of inertia and torsional stiffness are given for E = 1 m; the final values are shown in the drawing.
　　The axis spacing E, as required by the user, shall be ≤10 m.

Keywords

NUP New Elastic Sleeve Pin Coupling

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Shenyang Shenke Power Machinery Co,. Ltd.

Address: No. 34 Jia, Kaifa Avenue, Tiexi Economic and Technological Development Zone, Shenyang

Email:sincflex@vip.163.com

Phone:+86 24 25830257
Mobile phone:+86 15940017261

Fax: +86 24 25308993

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sincflex@vip.163.com

8615940017261

+862425830257