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ZWZ products & technical support

ZWZ / APPLICATION ENGINEERING

Lubrication and temperature in pumps and motors

Connect the temperature timeline with lubrication, assembly and operating conditions.

Lubrication and temperature in pumps and motors
Equipment and support arrangements
English guide to common diagram labels

The equipment descriptions explain these original diagrams in English. The original artwork is retained.

轴承
Bearing
内圈
Inner ring
外圈
Outer ring
滚动体
Rolling element
保持架
Cage
密封
Seal
径向
Radial
轴向
Axial
主轴
Main shaft / spindle
偏航
Yaw
变桨
Pitch
齿轮箱
Gearbox
发电机
Generator
丝杠
Screw
工作台
Table
减速机
Reducer
连铸
Continuous casting
热轧
Hot rolling
冷轧
Cold rolling
烘缸
Drying cylinder
压榨
Pressing
破碎机
Crusher
振动筛
Vibrating screen
回转支承
Slewing bearing
磨煤机
Coal pulverizer
01

Define the issue and the meaning of inputs

Separate heating at start-up, after relubrication and after a load change. Record the sensor position, ambient conditions, comparable load and maintenance events before comparing trends.

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02

Pumps and compressors: rib contact and friction

Pumps and compressors: rib contact and friction
Pumps and compressors: rib contact and friction

Position

pump/compressor shaft supports under combined loads.

Issue

roller-end/rib contact, cage geometry and operating clearance affect frictional heat together.

Design direction

optimise end-contact area and roughness, avoiding excessive contact or edge stresses; match pockets to roller contact.

Provide

load directions, temperature, lubrication, mounted clearance and alignment records.

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03

Assembly: measured clearance and matching

Assembly: measured clearance and matching
Assembly: measured clearance and matching

Deck example

axial spacing and assembly adjustments in matched pump supports affect running; arbitrary clearance changes can cause heat and damage.

Engineering focus

jointly measure raceways, rib-contact coordinates and cage envelopes; preserve matching and orientation.

Record

before/after dimensions, shims, measured preload/clearance, temperature trends and damage locations.

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04

Hydraulic motors: pressure, speed and contact

Hydraulic motors: pressure, speed and contact
Hydraulic motors: pressure, speed and contact

Conditions

hydraulic pressure, axial/radial loads, speed and oil temperature interact.

Group project (2025)

T7FC050-YYB and T7FC060-YYB design/testing comparisons.

Engineering focus

contact angle, roller-end/rib contact, preload and heat treatment; distinguish test conditions from field service history.

Provide

pressure/speed spectra, mounting arrangement, oil temperature and cleanliness, not system pressure alone.

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05

Follow an evidence-based inspection path

Inspection path

compare the lubrication arrangement with supply pressure/flow records, filtration, leaks and maintenance. Then examine assembly clearance, support arrangement and speed changes. Treat unverified causes as hypotheses; do not change lubricant, quantity or clearance on that basis.

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06

Information for a technical enquiry

Equipment and position

machine model, mounting position and complete bearing designation with suffixes. For replacements, include the original arrangement and fit dimensions.

Operating records

bearing speed in rpm, radial and axial loads, shocks and starts/stops. Paper-web and rolling-line speeds are not bearing rotational speeds.

Lubrication and assembly

lubricant grade, oil supply or relubrication records, temperature, mounted clearance or preload, seals and contamination.

Problem and objective

temperature rise, noise, vibration or flaking, timing, photographs and maintenance records, plus the outage window or redesign objective.

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07

Record a practical verification plan

Record drawing/reference versions, original duty, proposed changes, verification methods and results. Separate observations, hypotheses and verified conclusions. Follow equipment procedures; do not exceed operating limits to gather test data.

APPLICATION SUPPORT

Turn an equipment issue into a technical enquiry

Share the complete designation, position and operating records to discuss arrangements, lubrication, assembly or replacement.

Edited from the group’s 2025 industry presentation · Project records and design targets apply to their specific equipment conditions.

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