1. Product Overview

VPI series vacuum pressure impregnation equipment uses vacuum and pressure processes in a sealed tank to improve impregnant penetration into workpiece gaps, enhancing insulation, mechanical strength and moisture resistance while reducing surface temperature and failure risk. Tank diameters cover 700-5000mm, nominal volumes 0.41-98.13m³, working pressure 0.4-0.8MPa. Typical applications include insulation treatment of high-voltage motors, traction motors, special motors, explosion-proof pump motors, magnetic motors and transformer windings.

2. Industry Challenges & Root Cause Analysis

Insufficient insulation penetration:Traditional atmospheric impregnation struggles to penetrate tiny gaps inside windings – insufficient insulation performance. Root cause: lack of combined vacuum and pressure process, bubbles cannot be expelled.

Inconsistent impregnation quality:Large fluctuations between batches affect motor reliability. Root cause: imprecise control of vacuum, pressure and time parameters.

Insufficient equipment sealing reliability:High risk of seal failure in large tanks under pressure. Root cause: irrational tank structure and seal material selection.

Complex operation and maintenance:Large equipment is cumbersome to operate and difficult to troubleshoot. Root cause: lack of intelligent control system and comprehensive protection functions.

3. Solution

3.1 Vacuum-Pressure Combined Process:Vacuum is drawn first (ultimate vacuum 40-5000Pa) to expel air from workpiece gaps, then pressure is applied (0.4-0.8MPa) for full impregnant penetration. Compared to vacuum-only impregnation, insulation penetration is more complete and mechanical strength higher.

3.2 Full Range Coverage:Tank diameters 700-5000mm, nominal volumes 0.41-98.13m³ – covering requirements from small motors to large transformer windings. Customizable per workpiece size, process requirements and factory conditions.

3.3 Intelligent Control System:Equipped with touchscreen HMI and PLC control – precise setting and real-time monitoring of vacuum, pressure and time parameters. Process curves storable and recallable – simple and intuitive operation.

3.4 Safety Protection Design:Tank designed and manufactured per pressure vessel standards – equipped with over-pressure protection, safety valve, liquid level monitoring and other safety devices. Electrical system with over-current, over-voltage, phase loss protection.

4. Technical Specifications

Note: The above parameters are within the standard configuration range and can be customized according to workpiece size, process requirements, and factory conditions.

5. Selection Guide

5.1 Recommended Scenarios

• Insulation treatment of high-voltage motors, traction motors, special motor windings

• Insulation impregnation of explosion-proof pump motors and magnetic motors

• Vacuum pressure impregnation of transformer windings

5.2 Key Selection Considerations

1. Workpiece size and tank matching: Select tank diameter and volume based on maximum workpiece dimensions

2. Process vacuum requirements: Ultimate vacuum 40-5000Pa – confirm process requirements match

3. Working pressure requirements: 0.4-0.8MPa – confirm required pressure range for impregnation process

4. Factory conditions: Verify floor size and height meet installation requirements

6. FAQ

Q1: What are the advantages of VPI process over ordinary vacuum impregnation?

A: VPI adds a pressure stage (0.4-0.8MPa) after vacuum bubble removal, driving impregnant deep into tiny winding gaps under pressure. Insulation penetration is more complete, mechanical strength and moisture resistance significantly improved – suitable for demanding applications such as high-voltage motors.

Q2: Can the equipment handle workpieces of different specifications?

A: Tank diameters cover 700-5000mm, volumes 0.41-98.13m³ – select corresponding model based on workpiece size. Process parameters (vacuum, pressure, time) settable via touchscreen – adaptable to different workpiece impregnation requirements.

Q3: How is equipment safety ensured?

A: Tank designed and manufactured per pressure vessel standards – equipped with over-pressure protection and safety valve. Electrical system with over-current, over-voltage, phase loss protection. Operation interface with access management to prevent misoperation.

Q4: Can the equipment connect to factory MES systems?

A: Control system supports data acquisition and communication interfaces – MES integration available upon request for process parameter upload and production traceability.

7. Why Choose Wuxi Wondery

• Vacuum-pressure combined process: Ultimate vacuum 40-5000Pa + working pressure 0.4-0.8MPa – thorough impregnation

• Full range coverage: Tank diameter 700-5000mm, volume 0.41-98.13m³ – meets various workpiece requirements

• Intelligent control: Touchscreen + PLC – precise parameter setting and real-time monitoring – process curves storable

• Safe and reliable: Pressure vessel standard design – over-pressure protection + safety valve + electrical protection

• Widely applied: Serving industry leaders such as Wannan Electric, Huali Electric, CRRC Electric, Midea Group, Chint Group

• Full support: Installation, commissioning, operation training, and technical support – prompt after-sales response