Danfoss T90 Transit Mixer Drive System User guide

MAKING MODERN LIVING POSSIBLE

Technical Information

Series T90

Transit Mixer Drive System

powersolutions.danfoss.com

Technical Information Series T90 Transit Mixer Drive System

Contents

Series T90 Transit Mixer Drive

Transit Mixer Pump Series T90

Transit Mixer Motor Series 90

General Description .......................................................................................................................................3

General Description .......................................................................................................................................4

Technical Specications ............................................................................................................................... 6

Operating Parameters ..................................................................................................................................8

System Design Parameters .......................................................................................................................10

Features ...........................................................................................................................................................11

Control ..............................................................................................................................................................13

Inatallation Drawings ..................................................................................................................................14

General Description .....................................................................................................................................17

Inatallation Drawings ..................................................................................................................................18

L1207419 • Rev BA • October 20142

Technical Information Series T90 Transit Mixer Drive System

General Description

General

Product Features

System Features

The new Transit Mixer Drive System from Danfoss is based on more than 30 years‘ experience in the worldwide use of drum drive systems in transit mixers. Innovative electronics suitable for mobile use, combined with reliable technology, are the result of this development.

Danfoss oers, as a single supplier, complete systems for drum sizes from 6-18m³ [8-24 yd

] from one source.

The smart system resets the standard relating to the market requirements for reliability and simple handling.

• Hydrostatic transmission

- overall size 055, 075 and 100 cm³ [3.35, 4.49 and 6.10 in3]

- rotational group proven over millions in units

- noise reduction by 12 dB (A)

- exemplary reductions in overall volume and weight

• Operating units

- external and cab-mounted station

- simple installation and wiring

- electric plug connections suitable for mobile use

- no adjustments,“Plug and Perform“

• direction of rotation and speed via latched rotary switch on the cab-mounted or external station

• identical operating elements on the cab-mounted and external stations

• external station pushbutton: STOP/START the drum

• external station pushbutton: STOP/START the drum with the cab-mounted station

active

• cab-mounted station pushbutton: change over to external station and vice versa

• status reporting from the cab-mounted and external stations via LEDs

• active cab-mounted station during transit means the external station is switched o

• constant drum speed with variable pump-drive speed

• constant drum speed, irrespective of the loading of the drum

• exact repeatability of the drum speed by means of a latched rotary switch

• automatic maximum drum-speed limitation

A convincing, reliable and smart system solution from Danfoss which (at present) is still missing from your transit mixer?

L1207419 • Rev BA • October 2014 3

Technical Information Series T90 Transit Mixer Drive System

Servo piston Servo armPiston Slipper

General Description

Series T90 Family of Pumps

Danfoss provides Series T90 as an advanced type of axial piston variable displacement pumps for concret mixers, the development of which is based on more than 30 years of our experience in applying our products in the global market. The new T90 axial piston variable displacement pumps are derived from the sophisticated earlier type of S90 pumps, and are suitable for extended concrete mixer applications.

Series T90 variable displacement pumps are compact, high power density units. All models utilize the parallel axial piston/slipper concept in conjunction with a tiltable swashplate to vary the pump’s displacement. Reversing the angle of the swashplate reverses the ow of oil from the pump and thus reverses the direction of rotation of the motor output.

Series T90 pumps include an integral charge pump which is manually controlled to provide system replenishing and cooling oil ow, as well as control uid ow.

• Series T90 axial piston pumps are designed with the most advanced technology

• With optional sizes 055, 075, 100

• Installation: SAE standard ange

• Axial piston design of high eeciency

• Proved reliability and excellent performance

• Compact, light weight

• Worldwide sales and services

• Metric standard threads for main ports (A and B)

Design Series T90 pump cross-section

Slider block

Bushing

Cylinder block

Rear bushing

Charge pump

Feedback linkage

Cradle bearing

Roller bearing

Shaft seal

Input shaft

Cradle guideSwash plate

L1207419 • Rev BA • October 20144

Technical Information Series T90 Transit Mixer Drive System

General Description

Pictorial Circuit Diagram

Control handle

Reversible variable displacement pump

Input shaft

Pump swashplate

This conguration shows a hydrostatic transmission using a Series T90 axial piston variable displacement pump and a Series 90 xed displacement motor.

Displacement control valve

Heat exchanger bypass valve

Orice check valve

Servo control cylinder

Heat Exchanger

Charge pressure relief valve

Multi-function valve

To pump case

Charge pump

Multi-function valve

Reservoir

Vacuum gauge

Purge relief valve

Fixed displacement motor

Motor swashplate

Loop ushing valve

P400053

Output shaft

working loop (high pressure)

System Schematic

Pump Motor

working loop (low pressure)

Suction line

Control uid

L2 M1

Case drain uid

P400054

L1207419 • Rev BA • October 2014 5

Technical Information Series T90 Transit Mixer Drive System

Technical Specications

Features

Operating Parameters

Feature Unit 055 075 100

Displacement

Flow at rated speed (theoretical) Torque at maximum displacement (theoretical) Mass moment of inertia of rotating components

cm³ [in³] l/min

[US gal/min]

N•m/bar

[lbf•in/1000 psi]

kg•m² [slug•ft²]

[3.35]

215 [57]

0.88

[530]

0.0060

[0.0044]

[4.59]

236 [62]

1.19

[730]

0.0100

[0.0074]

100

[6.10]

300 [79]

1.59

[970]

0.0171

[0.0126] Weight (with control opt. MA) kg [lb] 40 [88] 49 [108] 68 [150] Mounting (per SAE J744) Flange SAE C Rotation Right hand or Left hand rotation Main ports: 4-bolts split-ange (per ISO 6162)

mm [in]

25.4 [1.0]

25.4

[1.0] Main port conguration Twin Ports Case drain ports

UNF thread (in.)

1.0625–12 1.0625–12 1.0625–12 (SAE O-ring boss) Other ports SAE O-ring boss Input Shafts Splined, 21 teeth Splined, 23 teeth Splined, 23 teeth

Parameters Unit 055 075 100 Input speed

Minimum

-1

Rated 3900 3150 3000

min

(rpm)

400 400 400

Maximum 4250 3350 3200 System pressure Continuous Maximum 420 [6090]

bar [psi]

400 [5800]

Minimum low loop pressure 10 [650]

Suction port pressure (charge pump inlet)

Minimum Minimum(cold start) 0.2 [24]

(abs)

bar [in. Hg vac.]

0.7 [9]

Case pressure

Continuous Maximum(cold start) 5.0 [73]

bar [psi]

3.0 [44]

L1207419 • Rev BA • October 20146

Technical Information Series T90 Transit Mixer Drive System

Technical Specications

Fluid Specications

Viscosity mm²/sec (cSt) [SUS]

Minimum 7 [49] Recommended range 12-80 [70-370] Maximum 1600 [7500]

Temperature range °C [°F]

Minimum -40 [-40] Rated 104 [220] Maximum intermittent 115 [240]

Filtration

Cleanliness 22/18/13 or higher standard ISO 4406 Eciency (suction line ltration)

=75 (β10≥2)

35-45

L1207419 • Rev BA • October 2014 7

+ 15 hidden pages