Fan coil with better transportation shock resistance

Abstract

A fan coil with better transportation shock resistance comprises a motor shell, bearing chambers are arranged on the two sides of the motor shell, rolling bearings are arranged in the bearing chambers, and inner rings of the rolling bearings are in interference fit with a motor shaft so that the motor shaft can be rotationally arranged in the motor shell. The rolling bearing comprises a bearing outer ring, a bearing inner ring and a bearing roller located between the bearing outer ring and the bearing inner ring, and during assembly, a damping piece is additionally arranged at the rolling bearing, so that direct dry friction is not easy to form between the bearing roller and channels of the bearing inner ring and the bearing outer ring in the transportation process; according to the utility model, the difficulty and the pain in the whole fan transportation process in the industry are solved, other protection tools are not required to be mounted, the reject ratio caused in the transportation process can be greatly reduced, most vibration generated in the transportation process can be filtered only by adding the damping piece between the rolling bearing and the bearing chamber in the whole fan assembly process, and the production efficiency is improved. The operation process is simple, convenient and fast, and can be easily integrated to an existing production line.

Description

Technical Field

[0001] The utility model relates to a fan coil unit with better transport shock resistance. Background Art

[0002] The fan coil unit, also known as the fan coil, is one of the core components in the central air-conditioning system. It is mainly responsible for regulating the indoor temperature and humidity, thereby providing a comfortable indoor environment. In the common structure of the fan coil, bearing chambers are arranged on both sides of the motor housing, and rolling bearings are arranged and installed in the bearing chambers. The inner rings of the two rolling bearings form an interference fit with the motor shaft, so that the motor shaft can be rotatably arranged in the motor housing. Generally, auxiliary parts such as wave pads and springs are arranged in the bearing chamber on one side to form a floating structure design at one end, so as to overcome the errors in the processing of parts and further facilitate the assembly of the whole machine.

[0003] When the motor rotor of the fan coil unit is operating normally, the internal clearance of the rolling bearing will be filled with grease, and the surfaces of the bearing rollers and the grooves of the inner and outer rings of the bearing will be covered with a uniform oil film. The bearing rollers perform rolling friction within the inner and outer rings of the bearing, and the overall friction is relatively uniform.

[0004] However, during transportation, the fan coil unit's motor rotor is mostly free and relatively stationary. When the rolling bearing is not in operation, it oscillates slightly due to external vibration loads, causing the bearing rollers to experience minute relative motion near the contact area of the groove. This small amplitude prevents the lubricant from being redistributed across the contact surface, resulting in direct metal-to-metal contact and interaction with oxygen. This causes corrosion of the metal on the contact surface and the generation of oxidized wear debris. During transportation, for example, acceleration and braking are common due to uncontrollable factors such as road conditions. Therefore, when subjected to external transient impact forces, the motor rotor will simultaneously generate one or more impact potential energies (such as axial impact, radial impact, and torsional wear), which drive the bearing inner ring and transmit them to the bearing rollers, ultimately acting on the inner and outer ring grooves of the bearing.

[0005] Repeated occurrence of this phenomenon leads to dry friction between the bearing rollers and the inner and outer rings. During this period of micro-vibration dry friction, wear develops at the contact area between the bearing rollers and the raceway due to vibration and torsion, resulting in marks similar to brinelling. Brinelling in the raceway of rolling bearings can reduce the fracture strength of the rings, generate acoustic effects and dynamic loads, and subject the product to varying degrees of jolts and vibration during transportation, leading to abnormal noise in the fan motor or bearing damage. Summary of the Invention

[0006] In view of the shortcomings existing in the above problems, the utility model provides a fan coil unit with better transportation shock resistance.

[0007] To achieve the above-mentioned objectives, the present invention provides a fan coil unit with better transportation and shock resistance, comprising a motor housing, bearing chambers being arranged on both sides of the motor housing, rolling bearings being arranged and installed in the bearing chambers, the inner rings of the rolling bearings forming an interference fit with a motor shaft so that the motor shaft can be rotatably arranged in the motor housing, the rolling bearings comprising a bearing outer ring, a bearing inner ring and a bearing roller located therebetween, and during assembly, a damping member is added to the rolling bearing to ensure that during transportation, the bearing rollers and the grooves of the bearing inner ring and the bearing outer ring are not prone to direct dry friction.

[0008] Furthermore, the damping member is a shock-absorbing rubber ring or grease with a set ratio, and the damping member is arranged between the inner ring of the bearing and the bearing chamber, wherein a wave pad spring is arranged and installed in one of the bearing chambers.

[0009] Furthermore, the damping member is a shock-absorbing rubber ring, and the damping member is arranged between the bearing outer ring and the bearing chamber.

[0010] Compared to existing technologies, this new device addresses the challenges and pain points associated with transporting complete wind turbines. It eliminates the need for additional protective equipment and significantly reduces the defect rate associated with transportation. During wind turbine assembly, simply adding a damping element between the rolling bearing and the bearing housing filters out most of the vibrations generated during transportation. This simple, convenient, and efficient process allows for easy integration into existing production lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural diagram of the fan coil unit before improvement;

[0012] Figure 2 for Figure 1 sectional view of

[0013] Figure 3 is a schematic diagram of the rolling bearing involved;

[0014] Figure 4 The present invention relates to a fan coil unit with better transport earthquake resistance (Example 1).

[0015] In the figure: 1. Motor housing; 2. Bearing chamber; 3. Wave washer spring; 4. Rolling bearing; 41. Bearing inner ring; 42. Bearing roller; 43. Bearing outer ring; 5. Motor shaft; 6. Damping element. DETAILED DESCRIPTION

[0016] Example 1: Figure 4As shown, a fan coil unit with better transportation shock resistance according to an embodiment of the present invention includes a motor housing 1, bearing chambers 2 are arranged on both sides of the motor housing 1, rolling bearings 4 are arranged and installed in the bearing chambers 2, the inner rings of the rolling bearings 4 form an interference fit with a motor shaft 5, so that the motor shaft 5 can be rotatably arranged in the motor housing 1, the rolling bearings 4 include a bearing outer ring 43, a bearing inner ring 41 and a bearing roller 42 located therebetween. During assembly, a damping member 6 is added to the rolling bearing 4 to ensure that during transportation, the bearing roller 42 and the grooves of the bearing inner ring 41 and the bearing outer ring 43 are not prone to direct dry friction; the damping member 6 is a shock-absorbing rubber ring, and the damping member 6 is arranged between the bearing outer ring 43 and the bearing chamber 2.

[0017] Example 2: The difference from Example 1 is that the damping member 6 is a shock-absorbing rubber ring or grease with a set proportion, and the damping member 6 is arranged between the bearing inner ring 41 and the bearing chamber 2, and a wave pad spring 3 is installed in one of the bearing chambers 2.

[0018] This solution addresses the difficulties and pain points associated with transporting complete wind turbines within the industry, eliminating the need for additional protective equipment and significantly reducing the defect rate associated with transportation. During the entire wind turbine assembly, simply adding a damping element between the rolling bearing and the bearing housing can filter out most of the vibrations caused by transportation. This simple, convenient, and efficient process can be easily integrated into existing production lines.

[0019] In order to facilitate understanding of the present invention, the following description will be given in conjunction with the accompanying drawings.

[0020] In Example 1, a damping element, such as a shock-absorbing rubber ring, is added between the bearing outer ring and the bearing housing. In this case, there's no need for a wave pad spring to dampen the bearing outer ring. When the rotor generates significant impact force, the shock-absorbing rubber ring effectively suppresses vibration amplitude while also allowing for slight play. Because the shock-absorbing rubber ring has a low inherent vibration frequency, it's unlikely to create a resonance band with other components.

[0021] In Example 2, a damping element, such as a shock-absorbing rubber ring or grease with a specific ratio, is added between the bearing inner ring and the bearing chamber. When the rotor generates a large impact force, the damping element can absorb a large portion of the energy. Furthermore, because the damping element has a low inherent vibration frequency, it is less likely to resonate with the excitation source during transportation, further reducing the impact force.

[0022] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A fan coil unit with better transport earthquake resistance, comprising a motor housing (1), bearing chambers (2) disposed on both sides of the motor housing (1), rolling bearings (4) disposed and installed in the bearing chambers (2), the inner rings of the rolling bearings (4) forming an interference fit with a motor shaft (5), so that the motor shaft (5) can be rotatably disposed in the motor housing (1), characterized in that: The rolling bearing (4) includes a bearing outer ring (43), a bearing inner ring (41), and a bearing roller (42) located therebetween. During assembly, a damping member (6) is added to the rolling bearing (4) to ensure that during transportation, the bearing roller (42) and the grooves of the bearing inner ring (41) and the bearing outer ring (43) are not prone to direct dry friction.

2. The fan coil unit with better transport earthquake resistance according to claim 1, characterized in that: The damping member (6) is a shock-absorbing rubber ring or grease with a set ratio. The damping member (6) is arranged between the bearing inner ring (41) and the bearing chamber (2), and a wave pad spring (3) is arranged and installed in one of the bearing chambers (2).

3. The fan coil unit with better transport earthquake resistance according to claim 1, characterized in that: The damping member (6) is a shock-absorbing rubber ring, and the damping member (6) is arranged between the bearing outer ring (43) and the bearing chamber (2).

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