| |
|
| |
 |
Special Features of
Tsurumi Contractors' Pumps
A
-
Tsurumi Stuffing Box - absolutely watertight !
 The
stuffing box is located at the cable entry section and takes the part of
sealing off water.
As the cable counductors consist of twisted wires, water may penetrate
into the motor by the capillary phenomenon when cable sheath or
insulation is damaged o r when the end of the cable is submerged. The
construction is such that a certain part of the insulation of each
conductor is peeled and filled with rubber or epoxy resin for the
complete sealing.
|
| |
B
-
Continuous use under dry-run
Located directly above the motor windings, a snap-action
self-resetting bi-metal device cuts off voltage from all three phase
windings simultaneously if the current is too large in one, two or
all three windings, or if the windings get too hot.
It is important for a mobile pump to retain protection when its
control box is crushed or gets wet inside, and when the cable is
damaged. By achieving this without the use of a solenoid switch,
Tsurumi enables measurement of winding resistance and insulation
from the far end of the cable, without ever removing the cover from
the motor in the field.
|
 |
| |
|
C
- Double mechanical SiC seal in oil bath with Oil Lifter
The interaction of a ring rotating with the shaft and a fixed ring,
below and above an oil bath, assumes the critical role of
withstanding pumping pressure and preventing water from seeping into
the motor. The seals of all Tsurumi contractors´ pumps, even in the
400W-class, have sealing rings of Silicon Carbide. No other material
has greater hardness, selflubrication is slightly better than that
of directly comparable materials. Resistance to temperature
fluctuation and corrosion is also the best available.
The KTZ and LH-series are equipped with specially developed
mechanical seals withstanding water pressure up to 10bar/100mH 20.
 |
- A
Motor side
- B
Sealing face
- C
Impeller side
- D
Upper stationary part
- E
Upper rotary part
- F
Oil chamber
- G
Spring
- H
Lower rotary part
- I
Lower stationary part
|
| |
|
|
D
- The patented
Oil
Lifter
- a special
guide vane - is attached inside the oil chamber. With
the motor rotation oil is pumped up. Therfore even at low
oil level lubrication and cooling of the mechanical seal is
secured. |
 |
|
| |
|
E
- Pump casing and Impeller
As contractors´ pumps are used in unpredictable circumstances,
Tsurumi has gone a long way towards making the impeller capable of
the impossible and towards providing spare motor power to match.
Tsurumi contractors´ pumps are used extensively for bentonite,
mud and water containing sand |
| |
F
- Ball
bearings of highest quality
Due to the high quality of the shaft and the bearrings all pumps
can be run horizontally when entirely submerged. |
|
|
In
the event of abrasive and corrosive utilization, stronger wear and
tear will take place naturally in certain components. In this
regard, please pay attention to our website
www.tsurumi-europe.com/englisch/applications |
|
|
|
|
