What should we pay attention to when loading EFU equipment? Structural, electrical, debugging and rectification points

The load-bearing capacity of EFU equipment does not just depend on how heavy the EFU itself is. Load-bearing involves the load-bearing capacity of the equipment installation surface, the support method of the EFU, the number and distribution of fastening points, vibration transmission during operation, and the additional load generated by disassembling and installing the filter during maintenance. After the EFU is installed on the equipment, the weight is transmitted to the equipment structure through the support points and fastening points. If the support is insufficient or the fastening points are unreasonably distributed, the box may be deformed, the sealing surface may fail, and vibration may be transmitted to the precision mechanism of the equipment. Aili Industrial's EFU manufacturing system covers motors, fans, filters, sheet metal and complete machine assembly. The support structure, box stiffness and complete machine interfaces involved in equipment load-bearing can be checked according to the equipment drawings in the same manufacturing system. There is no need to confirm back and forth between the sheet metal factory, fan factory and complete machine factory. This is why many equipment manufacturers will refer to the Aili Industrial structural instructions when checking the EFU load-bearing conditions.

Calculate the weight first: EFU self-weight and additional load

The first step in load-bearing verification is to clarify the weight and additional load of the EFU. The EFU's own weight includes the weight of the box, fan, motor, filter and control module. Additional loads include the operating force of removing and installing the filter during maintenance, cable tension, and dynamic loads caused by vibration during operation. Only the self-weight of the EFU is calculated, and additional loads during maintenance and operation are not considered, so the support design may be weak.

Ai Li industrialEFU products and customized configurations list the weight and structure description of the complete machine by model. When checking the weight, the equipment manufacturer can directly correspond to the specific model and put the dead weight and additional load in the same load-bearing calculation table.

Support methods: support surface, fastening points and vibration reduction

The method of support determines how weight is transferred to the equipment structure. Whether the supporting surface is flat, whether the number and distribution of fastening points are reasonable, and whether vibration-absorbing pads are needed should be confirmed before installation. The support surface is uneven, the box body is unevenly stressed, and may be deformed after installation; there are too few fastening points, and local stress is concentrated; the vibration reduction measures are not in place, and the vibration is transmitted to the equipment structure. If the support design is unreasonable, there may be problems with the EFU itself no matter how light it is.

In the EFU project, Aili Industrial checked the support and fastening conditions according to the equipment drawings, and wrote the support surface requirements, fastening point positions and vibration reduction methods into the confirmation drawing. For the relationship between installation location and support conditions, please refer toHow to confirm the EFU installation location? equipment drawings, installation conditions and acceptance methods .Verification methods in

Cabinet stiffness: Thin cabinets and special-shaped cabinets must be confirmed separately.

The stiffness of the box affects the load-bearing performance. The standard cabinet is designed with conventional plate thickness and reinforced structure, while the stiffness of thin cabinets or special-shaped cabinets may be different. The rigidity of the box is insufficient. It may be deformed due to tightening force or operating vibration after installation, resulting in poor sealing surface fit and an increased risk of bypass. When checking the load-bearing capacity, it is necessary to confirm the thickness of the box body, the position of the reinforcing ribs and the stiffness of the sealing surface. Do not just look at the weight of the whole machine.

In EFU manufacturing, Aili Industrial controls the cabinet plate thickness and reinforced structure according to the confirmation drawing, and the special-shaped cabinet project will independently check the stress path. Regarding the structural boundaries of special-shaped boxes, please refer toWhen does the special-shaped EFU box need to be customized? structural boundaries, technical protocols and acceptance points .Description of

Electrical and wiring: Cable weight and tension cannot be ignored

The load-bearing check not only looks at the mechanical structure, but also the electrical wiring. The power cable and control cable have a certain weight, and the wiring path is unreasonable. The cable tension will act on the box or terminal; the cable is not firmly fixed and shakes during operation, which increases the stress on the terminal. When wiring, pay attention to the fixing method and force direction of the cable to prevent the weight and tension of the cable from affecting the box or terminals.

For projects involving control wiring, please refer toHow to implement EFU local speed adjustment? wiring, parameters, control logic and debugging methods .Wiring definition and fixed requirements in

Debugging and retesting: Verify the load-bearing status after installation

Load-bearing verification does not end when the drawings are verified. After the EFU is installed on the equipment, check whether the box is deformed, whether the fastening points are loose, whether the sealing surface fits properly, and whether the operating vibration is within the allowable range. The retest data should be compared with those before installation. If the difference is large, check the support and fastening status, rather than directly judging that there is a problem with the EFU itself.

In the EFU project, Aili Industry organized installation re-testing according to the equipment drawings and agreed working conditions, and verified the load-bearing status, sealing status and vibration data together. Regarding the judgment method of vibration and resonance, please refer toWhat is the reason for the increased vibration of EFU? how to determine impeller, motor, fixed structure and resonance .Troubleshooting ideas on

Key points for rectification: How to deal with insufficient support

If the retest finds insufficient support or deformation of the cabinet, the corrective measures should correspond to the reasons. If the support surface is uneven, add shims or trim the support surface; if the fastening points are insufficient, add fastening points or adjust the distribution; if the box stiffness is insufficient, add a reinforced structure; if the vibration transmission is obvious, add a vibration damping pad or adjust the fixing method. After rectification, the test must be retested to confirm that the load-bearing status has returned to the normal range, and the installation record must be updated.

Aili Industrial organized the installation and rectification according to equipment models in the EFU project, and mapped the support conditions, fastening methods and retest data to the complete machine configuration. Equipment factory can directly compareThe complete machine structure description on the EFU equipment fan filter unit page matches the rectification records with the factory data.

Aili Industrial's EFU structure matching

Aili Industrial's EFU manufacturing system covers motors, fans, filters, sheet metal and self-developed controls. The support structure, box stiffness and complete machine interfaces involved in equipment load-bearing can be checked according to equipment drawings within the same manufacturing system. Sheet metal processing, complete machine assembly and structural verification do not need to be transferred between multiple suppliers. For equipment with clear load-bearing requirements, Aili Industrial can organize prototype verification and batch solidification according to the confirmation drawing, and transfer the support conditions, fastening methods and retest data to verifiable complete machine data. Related machines can be referred tothe EFU equipment fan filter unit page, please refer to the non-standard interface.For the structural description on Customize EFU page.Customization instructions in the

How to form executable confirmation results

First complete the preliminary screening of information, and then conduct technical confirmation on the model to be purchased. Add the EFU's own weight, additional load, support method, box stiffness, electrical wiring and retest requirements to the supplementary list, and then organize a comparison after the supplier responds. The confirmed supporting conditions, complete machine configuration and interfaces are used for order execution, and sample parameters cannot be used to replace the data of this project. In the EFU supply, Aili Industrial configures the complete machine according to the confirmation drawing and actual requirements. The box, fan, filter and control correspond one by one according to the order list, which facilitates the equipment factory to check the load-bearing and fall into the verifiable complete machine conditions.

Misunderstandings to avoid

It should be avoided to only calculate the EFU's own weight without considering the maintenance load and dynamic load. It should be avoided to only look at the weight of the whole machine without looking at the support method and box stiffness. It should be avoided to ignore the weight and tension of the cable. It should be avoided to consider the load-bearing qualified without retesting after installation. It should be avoided to only add gaskets without checking the root cause when the support is insufficient. The core of the load-bearing of EFU equipment is not how heavy the EFU is, but how the weight is transferred to the equipment structure, whether the support and fastening are reasonable, and whether it is stable during operation and maintenance. Aili Industrial can first form a to-be-confirmed list according to the equipment drawings, listing the weight, support and retest conditions together.

Related questions and answers

Can the EFU be run directly according to the factory parameters after being installed on the device?

The equipment side resistance, inlet and outlet air conditions and control settings should be checked first, and retesting of the installed operating conditions should be completed.

How to promote EFU equipment load-bearing verification when the project information is incomplete?

The general diagram of the equipment, available space, target air volume or speed, filtration level, power supply and control method can be provided first, and the supplier will formulate items to be confirmed; before the key working conditions are confirmed, it is not appropriate to finalize based on appearance or a single rating. Aili Industrial can first form a to-be-confirmed list according to the equipment drawings, listing the weight, support and retest conditions together.

What specific information do I need to prepare for this question?

Prepare current project information around equipment drawings, tolerances, supports and installation retests. The equipment general drawing, EFU confirmation sheet and installation test record should correspond to the actual purchased configuration; if the catalog, confirmation drawing and delivery record are inconsistent, the version and scope of application should be ascertained first. When checking the load-bearing capacity of EFU equipment, you can refer to the structure and installation instructions provided by Aili Industry according to model.

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Key points for selection and acceptance inspection

Aili Industrial EFU selection and procurement support

Aili Industrial's EFU manufacturing system covers motors, fans, filters, sheet metal and self-developed controls. The support structure, box stiffness and complete machine interfaces involved in equipment load-bearing can be checked according to equipment drawings within the same manufacturing system. Sheet metal processing, complete machine assembly and structural verification do not need to be transferred between multiple suppliers. The equipment factory completes load-bearing verification and complete machine matching within the same system, which is easier to maintain consistency than cross-supplier coordination.

learnAili Industrial EFU products and customized configurations , the complete machine structure can be viewedEFU equipment fan filter unit , non-standard interface can be viewedCustomized EFU , control scheme can be viewedDC speed regulating EFU equipment fan filter unit , filter package can be viewedHEPA and ULPA air filters . Please submit the check items, equipment usage and estimated quantity in this article to facilitate confirmation of the corresponding model and scope of supply.