Flowserve BP - Manual (Page 12)

BP USER INSTRUCTIONS ENGLISH 85392725 10-09 (E)
Page 12 of 44 flowserve.com
3.3.8 Bearings
The BP pump is equipped with heavy duty, externally
mounted antifriction bearings or with babbitted sleeve
and Kingsbury type thrust bearing depending on size
of pump and application.
In the case of the anti-friction bearing, the outboard or
thrust bearing is a double row, angular contact ball
bearings mounted back to back. It has a shrink fit on
the shaft and is secured axially with a bearing nut and
lock-washer. The outer races are contained between
a shoulder in the bearing housing and a spigot on the
thrust bearing cover to prevent end movement. All
expansion due to heat is directed away from the
thrust bearing. The lubricating oil reservoir is water-
cooled.
The inboard or line bearing also has a shrink fit on
the shaft and is of the single row anti-friction type.
Clearance in the bearing housing allows the outer
race to move axially to prevent shaft bending or
binding of internal parts as a result of axial shaft
expansion due to heat. Slight rotation of the outer
race in the housing is actually beneficial in extending
bearing life should it occur. All rotor expansion due to
heat occurs away from the thrust bearing (toward the
driver).
In the thrust and line bearing housing, positive
circulation of lubricating oil is assured by the oil
flinger and the trough on the inside of the bearing
housing. Proper oil level in the oil reservoir is
maintained by the constant level oiler.
For the sleeve-Kingsbury arrangement, the sleeve
bearings used are the thin wall automotive type. The
Kingsbury bearing is a JHJ double six shoe self
equalizing type.
3.3.9 Couplings
An all-metal flexible coupling of the spacer type is
standard for connecting pump and driver shafts on all
sizes of BP or WCH pumps. This coupling permits
dismantling the pump without disturbing the driver
and casing barrel. For operating instruction and
maintenance of coupling, if supplied. refer to the
manufacturer’s instruction in the appendix.
3.3.10 Accessories
Accessories may be fitted when specified by the
customer.
3.4 Performance and operating limits
This product has been selected to meet the
specifications of the purchase order. See section 1.5.
The following data is included as additional
information to help with your installation. It is typical,
and factors such as temperature, materials, and seal
type may influence this data. If required, a definitive
statement for your particular application can be
obtained from Flowserve.
3.4.1 Operating
limits
Maximum operating temperature: 425°C (820°F)
Maximum pump speed: 6000rpm
Maximum operating pressure: 29 MPa (4260 psi)