Dover Blackmer LGL3021A 설치, 작동 및 유지보수 지침 - 페이지 5

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Dover Blackmer LGL3021A 설치, 작동 및 유지보수 지침

COUPLING ALIGNMENT

The pump must be directly coupled to a gear reducer and/or

driver with a flexible coupling. Verify coupling alignment after

installation of new or rebuilt pumps. Both angular and parallel

coupling alignment MUST be maintained between the pump,

gear, motor, etc. in accordance with manufacturer's

instructions. See Figure 5.

Parallel alignment: The use of a laser alignment tool or

dial indicator is preferred. If a laser alignment tool or dial

indicator is not available, use a straightedge. Turn both

shafts by hand, checking the reading through one

complete revolution. Maximum offset must be less than

.0005" (0.127 mm).

Angular alignment: Insert a feeler gauge between the

coupling halves. Check the spacing at 90° increments

around the coupling (four checkpoints). Maximum

variation must not exceed 0.005" (0.127 mm). Some

laser alignment tools will check angular alignment as

well.

Replace the coupling guards after setting alignment.

Figure 5 – Coupling Alignment

V-BELT DRIVE

For installation of Blackmer V-belt units, first mount the pump

and the motor base to the unit base. Do not fully tighten the

motor mounting bolts until properly installing and adjusting the

belts as follows:

Wipe the cone surface of the pump QD hub (152A) and

the inside of the pump sheave hub with a clean cloth

moistened with a light grade of machine oil. This will

allow for a more uniform draw and prevent the cone

surfaces from "freezing" before being tightened.

With the pump shaft key (35) in place, align the key seat

and slide the QD hub (152A) on the shaft, flange end

first. Slide the large end of the sheave (152) bore over

the taper on the QD hub. Insert the three sheave

capscrews (152G) through the clearance holes in the

sheave, and start them into the tapped holes of the QD

hub (152A). Repeat this procedure to assemble the

motor QD hub (152E) and sheave (152D).

To install the belts (181), shorten the center distance of

the drive by moving the motor towards the pump, until the

belts can be put on the sheaves (152 & 152D) without

forcing.

Align the sheaves so that the faces are parallel, then

snug up the sheave capscrews (152C & G).

Figure 6 –

V-Belt Adjustment

MOTOR DRIVEN PUMPS

OUTSIDE DIAMETER

Do not operate

V-BELT DISASSEMBLY

Refer to Blackmer V-Belt Parts List and Instructions for

V-belt drive and guard part numbers.

501-L00

Page 5/12

Measure the span length as shown in Figure 6.

Adjust the motor base (183) and apply a specified force

(see Table 1) against the belt, at the center of the span,

so that the belt is deflected 1/64 inch (0.04 mm) for every

inch (25.4 mm) of span. For example, the deflection of a

20 inch (508 mm) span would be 20/64 or 5/16 inch (7.9

mm). Refer to Table 1 for the deflection force of a

properly tensioned drive. A new set of belts should be

initially tensioned to the upper limit.

BELT DEFLECTION FORCE

SMALL SHEAVE

2.5" to 4.5"

(63 mm to 114 mm)

4.75" to 7.0"

(121 mm to 178 mm)

Table 1 - Deflection Force Per Belt

Check again to ensure the sheaves (152 & 152D) are

parallel, then tighten the sheave capscrews (152C &

152G), the motor mounting nuts (183B) and the adjusting

screw locknut (183B).

Assemble the belt guard (182) and the belt guard brace

(182A) to the unit base (32).

Operation without guards in place can

cause serious personal injury, major

property damage, or death.

without guard

in place

Check the belt tension after 24-48 hours of operating.

Recheck the tension periodically and tighten the belts as

required. DO NOT overtighten belts. Inspect belts

periodically for signs of excessive wear, and replace as

required.

Remove the belt guard (182) and the guard base (182A).

Loosen the adjusting screw locknut (183B) on the motor

base (183) and the motor mounting nuts.

Ease the tension on the belts (181) by moving the motor

towards the pump to shorten the center distance of the

drive. Remove the belts by sliding them over the sheaves

(152 & 152D). DO NOT force the belts over the grooves.

To remove the sheave from the hub, first remove the

three sheave capscrews (152C or 152G). Then screw

two of the capscrews into the threaded holes in the

sheave hub (152A or E). If the cone grip is hard to break

loose, tap the end of the shaft or the QD hub with soft-

faced mallet while maintaining pressure on the screw.

The QD hub should slide smoothly off the shaft. If it is

tight on the shaft, gently pry it loose with a screwdriver or

a small wedge placed in the split part of the flange.

Minimum

Maximum

3.0 lbs

4.75 lbs

(1.4 kgs)

(2.2 kgs)

4.0 lbs

6.0 lbs

(1.8 kgs)

(2.7 kgs)