2 Product Description and Overview of Types Catalog – Mixer and Agitator Drives of the MC.. Series 2 General information Product Description and Overview of Types 2.3 General information

8 Catalog – Mixer and Agitator Drives of the MC.. Series

2 More Efficiency for Mixing and Agitating ApplicationsProduct Description and Overview of Types

2 Product Description and Overview of Types2.1 More Efficiency for Mixing and Agitating Applications

In process engineering plants, large axial and radial forces occur at the agitator shaftduring agitating processes. Traditional designs solve this problem with separate, exter-nal bearings that take on the function of the agitator shaft. bearings. However, in manycases this solution has proved very cost-intensive.

SEW-EURODRIVE’s new “EBD” (Extended Bearing Distance) concept offers strongerbearings within the gear unit itself, which means that in many cases separate bearingsare no longer required in the agitator or an oversizing of the gear unit can be avoided.

The high-torque industrial gear units of the MC series can be used for the reliable oper-ation of mixers, agitators and surface aerators. Likewise, the powerful and stiff bearingsare suitable for absorbing forces that occur in drives for wet, dry and hybrid cooling tow-ers. The concept is supplemented by an optional drywell seal, which reliably preventsoil leakage at the output shaft and standardized mounting flanges.

59326AXX

Catalog – Mixer and Agitator Drives of the MC.. Series 9

2Overview of the benefitsProduct Description and Overview of Types

2

2.2 Overview of the benefits

• Powerful:

Output bearings with high load-bearing capacity and reinforced output shaft.

• Available:

Short delivery times due to stocked components and the unique, internationalassembly network of SEW-EURODRIVE.

• Flexible:

Different output flange dimensions can be adapted to the gear unit using clear inter-faces [1]; one gear unit design can be used for both foot and flange mounting.

55590AXX

[1]


2 General informationProduct Description and Overview of Types

2.3 General information

Rated power, torques and input speeds

The rated power and torques mentioned in the catalog depend on the input speed andare valid for a service factor of FS = 1.0 and a constant, unidirectional load. If the direc-tion of rotation changes once per minute under full load, then only 70 % of these valuesapply.

The overview shows nominal powers and torques for input speeds of 1800 rpm,1500 rpm, 1200 rpm and 1000 rpm. The nominal torque is also valid for input speeds 3 % lower than synchronous speeds. For input speeds exceeding 1800 rpm, contactSEW-EURODRIVE.

Thermal rating The thermal rating needs to be checked for every gear unit. The relevant values arelisted in the selection tables.

Noise level The noise level of all MC gear units is below the permitted values defined in VDIguideline 2159 for gear units.

Coating The gear units are painted with "blue gray" machine paint RAL 7031 according to DIN 1843. Special coatings are available on request.

Surface and cor-rosion protection

If required, all gear units can be supplied with a special surface and corrosion protectionfor applications in extremely humid and/or chemically aggressive environments.

Weights Note that all weights shown in the catalog exclude the oil fill for the gear units. You willfind recommended values for oil quantities depending on mounting position and gearunit design in the dimension drawings. The exact gear unit weight is given in the order-specific dimension drawing.

Low output speeds

Very low output speeds (ratios above 112:1) can be achieved by combining the MC gearunit with a SEW-EURODRIVE gear unit or gearmotor of the R…, F…, K… or S… type.

It may be necessary to limit the motor power to match the maximum permitted outputtorque of the MC unit.

Supply of cooling air

For gear units with cooling fans on the input shaft, it is important that there is enoughspace in axial and radial direction for a sufficient supply of cooling air. Also refer to the"Cooling fan" section.

International markets

SEW-EURODRIVE is a member of the AGMA (American Gear Manufacturers´Association), and as such, all its gear units conform to AGMA specifications.


2General informationProduct Description and Overview of Types

2

Sealing system The gear unit described in this catalog can be supplied with different seal arrangementsfor HSS and LSS (→ chapter 6.2)

• Double lip seal (basic solution) for LSS, single lip seal on HSS

• Double lip seal with grease nipple

• Radial labyrinth seal with grease nipple

• Drywell

Lubrication The lubrication types "bath lubrication" are used for the MC series desribed in this cal-talog. Pressure lubrication can be used as option for these gear units.

Motor adapter The motor adapters are designed for mounting IEC or NEMA motors (→ chapter 6.4).

Modular accessories

Several accessories are available for industrial gear units:

• Mounting flange (→ chapter 6.1):

Mounting flange for hollow or solid LSS.

• Motor adapter with fan (→ chapter 6.4):

For mounting IEC (B5) or NEMA C-face motors with integrated cooling fan.

Futher accessoriesFor detailed information, refer to the current catalog "Industrial gear units of the MC.. Se-ries".

• Cooling fan:

A cooling fan is used when the thermal rating of the gear unit is insufficient. The fanis bi-directional.

• Shrink disc:

A shrink disc connection is available on request for the gear units described in thiscatalog. The selection tables for loads on the output shaft are not valid for this con-figuration!

• Backstop:

Gear unit with integrated backstop to prevent undesirable reverse rotation.

• Motor bracket:

Motor mounting platform for belt driven input.

• V-belt drive:

Belt driven input. Includes motor bracket, pulleys, V-belt and belt guard.

• High speed shaft (HSS) elastic coupling:

Preselected HSS couplings are available for mounting to the input motor. Couplingselection depends on motor power and gear unit size.


2 General informationProduct Description and Overview of Types

• Low speed shaft (LSS) gear coupling:

Preselected LSS gear coupling based on the nominal gear unit torque and outputshaft diameter.

• Shaft end pump:

(Only available for gear unit sizes 04 – 09) The shaft end pump is the preferredsolution when pressure lubrication is required.

• Pressure lubrication with cooler:

A pressure lubrication system with cooler is used when the thermal rating of the basicgear unit is not sufficient. A cooler is used in operating environments where a fancannot be used or is not sufficient.

• Oil drain valve:

A ball valve is mounted to the drain plug to allow for easily attaching a drain pipe tothe valve when changing the gear unit oil.

• Oil heater:

(Only available for gear unit sizes 04 – 09) The oil heating system ensures that theoil is in sufficient liquid condition when starting up the gear unit in cold environments.

• Temperature sensor PT100:

The PT100 temperature sensor can be used for measuring the oil bath temperaturein the gear unit.

• SPM adapter (shock pulse adapter):

Adapters are installed on the gear unit housing for monitoring the vibration at variouspoints on the gear unit.

• Thermo-switch:

The thermo-switch is used to monitor the temperature of oil flowing into the gear unitor the oil sump temperature.

Normally used function of thermo-switches:

– pre-alarm at 70°C or 80°C– stop the main motor of the gear unit at 90°C or 100°C


2Product description and basic gear unit versionsProduct Description and Overview of Types

2

2.4 Product description and basic gear unit versions

The EBD (Extended Bearing Distance) feature expands the standardized product port-folio of the MC range for applications with high external loads acting on the LSS (LowSpeed Shaft).

The main target applications for the designed solutions are primarily vertical applicationswith combined radial and axial forces, like for example

• Mixer and agitator drives for use in different industries such as

– Chemical– Hydrometallurgy– Food– Building material

• Aerators for waste water treatment

• Wet and dry cooling towers

Therefore, this catalog concentrates on gear units with vertical LSS (MC.PV… andMC.RV….).


2 Basic gear unit versionsProduct Description and Overview of Types

2.5 Basic gear unit versions

The standard bearing arrangement, which is also described in this catalog, is expandedby an "EBD" (Extended bearing distance) feature with reinforced output shaft bearings.This EBD arrangement can cope with high external loads acting on the LSS (Low SpeedShaft).

The following provides an overview of the basic gear unit versions described in thiscatalog:

MC.. units are available as

• parallel shaft helical gear units (MC.P..) and

• right-angle bevel-helical gear units (MC.R..)

in vertical gear unit design

• Vertical LSS (MC..V…) with "vertical" output shaft

with the follow-ing mounting options:

• Foot mounted (MC…F)

• Flange mounted (no designation)

Basic output shaft (LSS) variants

• Solid shaft with keyway (MC…S)

• Hollow shaft with keyway (MC…H)

Other variants, such as

• hollow shaft with spline according DIN 5480

• shortened solid shaft without keyway for shrink fitted flange coupling hub

• Hollow shaft for shrink disc connection (MC…H)

are available on request.

58522AXX


2Basic gear unit versionsProduct Description and Overview of Types

2

The following basic variants are possible for motor connection:

• Motor adapter with elastic coupling

• Motor bracket with V-belt drive

Below an overview of the basic gear unit versions described in this catalog:

Motor connection Output shaft

Motor adapter

Solid shaft with keyway

Hollow shaft with keyway

Motor bracket with V-belt drive Mounting optionsFoot mounted Flange mounted

MC.P...


2 Basic gear unit versionsProduct Description and Overview of Types

Motor connection Output shaft

Motor adapter

Solid shaft with keyway

Hollow shaft with keyway

Motor bracket with V-belt drive Mounting optionsFoot mounted Flange mounted

MC.R...

For further information about the MC…series, please refer to the "Industrial Gear Unitsof the MC... Series" catalog from SEW-EURODRIVE.


2Available variants, mounting options and bearing arrangementsProduct Description and Overview of Types

2

2.6 Available variants, mounting options and bearing arrangements

The selection of the required shaft/bearing arrangement depends on:

• Mounting option (foot or flange mounted)

• Shaft type (solid or hollow shaft)

• Required overhung load capacity of the shaft/bearing arrangement (→ 10.3 and 11.3"Overhung load diagrams")

Standard bearing arrangement

The following table provides an overview.

Solid shaft MC...S Hollow shaft MC...H

Available sizes 02...09 02...09

Radial load capability1)

1) see chapters 10.3 and 11.3

moderate moderate

Axial load capa-bility1) moderate moderate

Mounting

Flange

58533AXX 58543AXX

Foot

58541AXX 58542AXX


2 Available variants, mounting options and bearing arrangementsProduct Description and Overview of Types

Extended bear-ing distance arrangement (EBD)

The following tables provide an overview:

Solid shaft MC...S Hollow shaft MC...H

EBD shaft type 2 1 1

Available sizes 02...09 02...06 02...09

Radial load capability1) very high high high

Axial load capa-bility1) high very high high

EBD type

Mounting

EF... Flange

56933AXX 57005AXX 56994AXX

EN... Foot

56991AXX

not available not available

1) see chapters 10.3 and 11.3

EZ...

Alternative foot mounting or prepared for

customer sup-plied flange

56992AXX 57012AXX

not available


2Available variants, mounting options and bearing arrangementsProduct Description and Overview of Types

2

This table gives an overview of available solid shaft diameters:

This table gives an overview of available hollow shaft diameters:

Size EBD shaft 2 ∅ [mm] EBD shaft 1 ∅ [mm] Standard shaft ∅ [mm]

02 95 80 80

03 115 95 100

04 125 105 105

05 135 120 120

06 150 125 130

07 160 - 140

08 170 - 160

09 180 - 170

Size EBD shaft 1 ∅ [mm] Standard shaft ∅ [mm]

02 75 80

03 90 95

04 100 105

05 110 115

06 120 125

07 130 135

08 140 150

09 150 165


2 Unit designation for gear unitsProduct Description and Overview of Types

2.7 Unit designation for gear units

Sample unit designation

Sample designation EBD design

MC 3 P V S F 05

Size: 02 ... 09

Gear unit mounting:F = Foot mountedT = Torque arm

Low speed shaft type (LSS):S = Solid shaftH = Hollow shaft (key or shrink disc connection)

Gear unit design:L = Horizontal LSSV = Vertical LSSE = Upright mounting position

Gear unit type:P = Helical gear unitR = Bevel-helical gear unit

Number of gear stages:2 = Two stages3 = Three stages

Industrial gear unit series: MC

EZ 1 2 B

Options:B = Outer bearing is oil lubricated (standard) G = Outer bearing is grease lubricated (= Drywell for vertical LSS down-

wards) L = Leakage indicator

Bearing type:3 = bearing type 32 = bearing type 21 = bearing type 1

Shaft type:1 = Solid shaft type 1 (MC..S) or hollow shaft (MC..H.)2 = Solid shaft type 2

Extended bearing distance type

Documents

2 Product Description and Overview of Types Catalog – Mixer and Agitator Drives of the MC.. Series 2 General information Product Description and Overview of Types 2.3 General information