LA CIUDAD DE SANTIAGO DE CUBA El escenario geográfico

seal around the locknut to exclude dirt. Do this while rotating the shaft to ensure the grease is distributed evenly. Use a grease of NGLI NO.2 or NO.3 consistency such as MOBILUX EP2 or equivalent. 14. Refer to Section 4, Table 11 for torque values on bolts. 15. Fill the pinionshaft housing with preservative oil to prevent corrosion of the pinionshaft and bearings during periods of non-use. Fill to the proper oil level (see Section 3, General Specifications sheet for approximate oil quantity for the pinionshaft housing). Lubricant recommendations are discussed in Section 13. 16. If the pinionshaft assembly is to be stored or shipped,

the Pinionshaft assembly must be shipped and stored in a flat horizontal position so that oil does not leak past the pinion end seal.

BUILDING JOIST HYDRAULIC JACK BAR PINION PLATE BLOCKING PINION SHAFT BLOCK FIG. 9-5 — Method of Removing Pinion

SUPERIOR MK- II

Gyratory Crushers

Section 9 —

Pinionshaft

Assembly

1. To reinstall the pinionshaft assembly:

a. Position the counterbalancing pipe on the bare drive end of the shaft. Place the gaskets (3030-0) on the bolting flange of the pinionshaft housing.

CAUTION: ALWAYS USE THE ORIGINAL THICKNESS OF GASKETS WITH THE SAME PINION AND GEAR. ANY CHANGE FROM THE ORIGINAL WILL CHANGE THE TOOTH CON- TACT PATTERN ON THE PINION AND GEAR.

b. Install heavy duty hoist rings in the threaded holes on top of the pinionshaft housing and the pinion- shaft housing mounting flange.

c. Position the pinionshaft assembly in the bottom shell opening (see Fig. 4-8, in Section 4). The close clearance fit in the bottom shell may require some movement of the assembly with the pipe counterbalance to engage the leads of the fit. As the pinion reaches the gear it may be necessary to turn the pinionshaft to engage the teeth of the pinion and gear to complete the entrance. d. Draw up the attaching bolts evenly and securely. e. Set the proper backlash between gear and pinion. See “Gear and Pinion Backlash Adjustment” in this section.

f. Re-connect the hose assemblies (3341-2) (Fig. 9-2) from the oil sight gauge to the pinionshaft housing.

g. Remove oil fill plug (3575-0) and fill to the correct oil level with the proper oil. See Fig. 9-2 for correct level. See Section 13 “Lubrication” for type of oil.

2. If a new pinion, gear or eccentric has been installed, check backlash and tooth contact, per “Bevel Gear Installation and Maintenance,” later in this section. 3. Install the pinionshaft coupling half and floating drive

shaft assembly. Realign the drive shaft if backlash was readjusted.

4. Replace drive guard.

GEAR AND PINION BACKLASH ADJUSTMENT

Fig. 9-6 shows a front elevation of the pinionshaft assembly mounted in the bottom shell. Slotted holes (“A”) are provided in the pinionshaft housing flange for bottom shell to pinionshaft housing studs (1505-0), so that the housing can be rotated about its center line.

The pinionshaft center line is offset from the housing center line in the horizontal plane. Rotating the housing in a clockwise direction will cause the pinion gear to move downwards, toward the eccentric drive gear. Counterclockwise rotation will cause the pinion gear to move away from the eccentric gear.

Rotational adjustment in either direction to the correct backlash setting for the gear and pinion is accomplished by means of jack bolts (3006-0) mounted on the bottom shell housing and bearing on a flanged portion of the pinionshaft housing (“B”). Hex nuts (3006-2) are provided to lock the jack bolts in the desired location after adjusting gear and pinion backlash.

See Table 9-1 which lists the correct range for the “pitch line” backlash.

1505-0 1505-1 1505-2 1505-3 3006-0 3006-2 “A” Catalog Number Description

1505-0 Stud — bottomshell to pinionshaft housing

1505-1 Nut

1505-2 Washer 1505-3 Locknut

SUPERIOR MK- II

Gyratory Crushers

Section 9 —

Pinionshaft

Assembly

CURVED TOOTH SPIRAL BEVEL GEAR INSTALLATION AND MAINTENANCE

Bevel gears of the curved tooth spiral type are used in SU-

PERIOR crushers.The following information is to assist

you in installing and maintaining these gears. Since the tooth “contact patterns” (area of contact) of spiral bevel gears vary with each gear installation, the following infor- mation pertains to the ideal installation. Some slight ap- parent misalignment will occur with all installations be- cause the gears are not rigidly mounted. However, tooth “contact patterns” which show obvious serious misalign- ment should be corrected.

When reinstalling gears, note and check the tooth “contact patterns” under heavy loads and accept these as normal. Then, using the charts provided on spiral bevel gear misalignment, make the necessary adjustments to maintain the proper tooth “contact patterns” for the gears.

ASSEMBLING AND INSTALLING SPIRAL BEVEL GEARS

1. Check to make certain the gear and pinion are prop- erly located on the eccentric and pinionshaft. 2. Check the tooth contact patterns.

3. Check for correct amount of backlash.

4. Tighten all lock nuts, bolts, etc., on the mountings. 5. Lubricate gears properly before operating under

power.

MEASURING BACKLASH

Spiral bevel gears are machined to have a definite amount of backlash (clearance) as determined by the pitch of the gears and the operating conditions. The correct amount of backlash is necessary for safe and proper operation of gears. See Fig. 9-7. Insufficient backlash results in noisy gears, excessive wear, scored tooth surfaces, and break- age.

When checking the backlash of the gears, move the eccentric assembly toward the pinion to remove all clear- ance between the eccentric and the bottom shell bushing. If the crusher is assembled, put a block of wood in the crushing chamber on the side opposite the pinion. Raise the mainshaft assembly, using the MPS control. Applying 50 psi pressure above the level caused by the static load

Be sure to use accurate instruments to measure back- lash. A dial indicator is recommended if available.

BACKLASH

CONTACT

FIG. 9-7 — Backlash in the Plane of Rotation

Table 9-1 lists the “Normal Backlash” which is the back- lash measured perpendicular to the tooth surface at the outer end of the tooth. Due to the design of the Superior gyratory, it is not possible to physically measure the “Nor- mal Backlash” of the gear and pinion as assembled in the crusher. However, it is possible to measure the “Backlash in the Plane of Rotation” which is directly proportional to the “Normal Backlash.” To obtain “Backlash in the Plane of Rotation,” the “Normal Backlash” must be divided by the cosine of the spiral angle and the cosine of the pressure angle.

Table 9-1 also lists the “Backlash in the Plane of Rota- tion” which has been calculated and can be used in the for- mula below to determine an equivalent rotation at the pi- nionshaft coupling OD.

The following formula is suggested for checking the backlash:

CMC (Circumferential Movement at Coupling) = PDP (Pitch Diameter of Pinion)

Where COD = Coupling Outside Diameter

Example: Model 60-100 SUPERIOR crusher may have a 21.60--inch COD. What should the circumferential movement measurement be on the coupling out- side diameter? See Table 9-1 for correct “backlash in the plane of rotation” and solve as below.

CMC = _21.6

Backlash in Plane of Rotation x COD

.108 x 21.6

SUPERIOR MK- II

Gyratory Crushers

Section 9 —

Pinionshaft

Assembly

Pitch Diameter of Pinion “Normal Backlash” at pitch line “Backlash in plane of rotation”

Crusher Size In. mm In. mm In. mm

60-110 21.6 548 .083--.100 2.11--2.54 .108--.131 2.74--3.33

Table 9-1 Pinion pitch diameter, “normal backlash” and “backlash in plane of rotation.”

TO SET BACKLASH

1. Use “Blueing” to check tooth contact patterns. 2. Adjust to get the proper tooth contact by adding or re-

moving a gasket between the bottom shell and pinion- shaft housing. See Fig. 9-8 and the photos on follow- ing page for illustrations.

3. Check backlash as previously outlined.

4. If backlash is incorrect, adjust it by rotating the pinion- shaft assembly. The pinionshaft housing flange has slotted holes for this purpose. Loosen the bolts (1505-0) which hold the assembly to the bottom shell. The pinionshaft center line is offset from the housing center line in the horizontal plane. Rotating the as- sembly raises or lowers the pinion to change the back- lash. Jack bolts are mounted in the bottom shell adja- cent to the pinionshaft to facilitate rotating the assembly. See “Gear and Pinion Backlash Adjust- ment” earlier in this section.

PINION

GEAR

FIG. 9-8 — Ideal Tooth Contact Patterns for Spiral Bevel Gears

TOOTH CONTACT PATTERN OF CURVED TOOTH SPIRAL BEVEL GEARS

Spiral bevel gears are produced to run with a localized tooth bearing. Since the area of contact does not cover the whole gear tooth, a slight tolerance in positioning the gears in as-

teeth. The ideal tooth contact pattern is slightly high on the pinion and low on the gear, as shown in Fig. 9-8. Under light load its length is usually one-half the total length to allow for adjustment for smooth operation. Usually the tooth contact pattern will shift toward the heel under heavy load — for this reason gears are cut so they will bear nearer the toe. See Fig. 9-9 for gear tooth nomenclature.

PROFILE ADDENDUM DEDENDUM TOE CENTER HEEL LARGE END

FIG. 9-9 — Gear Tooth Nomenclature

The pictures in Fig 9-10 represent the possible tooth con- tact patterns on a gear member of a pair of correctly ma- chined bevel gears . . . their causes and corrections. Re- member, however, that these are deviations from the ideal

SUPERIOR MK- II

Gyratory Crushers

Section 9 —

Pinionshaft

Assembly

A. NORMAL GEAR PATTERN

Note centralized contact pattern on both pressure and non-pressure

side of teeth. Results in heavy toe contact on pressure side of tooth.Corrective action — move pinion towards center line of crusher until

normal gear pattern results.