Sperre HV1/140A, Руководство по обслуживанию

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Sperre Air Compressor
Two stage, water cooled
Model: HV1/140A
2. DESCRIPTION OF COMPRESSOR
2.1. Design
The machine covered by this instruction book is a single cylinder, 2-stage single-acting water-
cooled air compressor. The design principle is shown in the cross-sectional drawing Fig. 2,
page 31.
The first stage of the compressor is the low-pressure stage (LP) and the second is the high-
pressure stage (HP). Air circulation through the compressor is shown in Fig. 3, page 32. The
letters indicate:
A. Suction filter
B. LP suction valve
C. LP delivery valve
D. LP safety valve
E. LP cooler
F. HP suction valve
G. HP delivery valve
H. HP cooler
I. HP safety valve
The big-end bearing is a two-shell plain bearing and the gudgeon pin bearing is an undivided
press-fitted plain bearing. The big end and gudgeon pin bearings are pressure-lubricated
from a gear pump mounted on the end of the crankshaft. The crankshaft bearings are two-row ball
bearings.
Vertical cooling tubes are rolled into the compressor cylinder block. These serve to cool the air
after first-stage compression and again after second-stage compression. The cooling water intake
and outlet are located so that the water circulates through the cylinder block and ensures
efficient cooling of the air and compressor cylinder walls.
The compressor compresses air from atmospheric pressure to rated pressure, with an upper limit
of 35 bars.
The compressor is designed for installation together with an electric motor or other drive unit on a
well-stiffened base, with a flexible coupling between compressor and motor.
Every compressor is tested before delivery from the factory, and all compressor sets supplied
complete with motor are aligned before dispatch. See chapters 3.1. and 5.6.
This compressor is designed to supply compressed air for engine starting, and for the operation
of air power equipment and instruments. It complies with the requirements specified by the
classification institutions.
2.2. Safety equipment
The compressor is fitted with two safety valves, one after the first-stage compression and the
other after second-stage compression.
The safety valves, which are set at the factory in accordance with the working pressure specified
by the customer, ensure that the pressure does not exceed the limit for which the compressor
and compressed air system are dimensioned.
The cylinder block cooling jacket is fitted with a safety plate which will blow out if the cooling
water is subjected to excessive pressure. Use only manufacturer's genuine safety plates to
replace blown plates.
The compressor's automatic control equipment normally comprises a pressostat which shuts
down the compressor if the tube oil pressure falls below the minimum limit.
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