CN219605611U

CN219605611U - Fan for eliminating bearing electric erosion

Info

Publication number: CN219605611U
Application number: CN202320904864.0U
Authority: CN
Inventors: 胡晓槟; 陈锦威
Original assignee: Nideco Electric Dongguan Co ltd
Current assignee: Nideco Electric Dongguan Co ltd
Priority date: 2023-04-21
Filing date: 2023-04-21
Publication date: 2023-08-29
Anticipated expiration: 2033-04-21

Abstract

The utility model relates to the technical field of fans, and provides a fan for eliminating bearing electric erosion, which comprises: a fan housing, a rotor assembly, a stator assembly, and a circuit board; the rotor assembly comprises a rotating shaft and an impeller arranged on the rotating shaft; an integrated mounting seat is arranged in the center of one axial side of the fan shell; an opening is reserved on the mounting seat; a cylindrical bearing sleeve is arranged in the axial direction of the fan shell; the bearing sleeve is arranged on the inner side of the mounting seat; a bearing for supporting the rotating shaft is arranged on the radial inner side of the bearing sleeve; the silicon steel sheet is fixed on the radial outer side of the bearing sleeve, and the circuit board is provided with a conductive grounding spring sheet; one end of the grounding spring plate passes through the opening of the mounting seat and is in contact with the periphery of the bearing sleeve. The utility model can eliminate the generation of bearing electric erosion by means of dredging the shaft current, thereby preventing the rotation performance of the fan from being reduced and prolonging the service life of the fan.

Description

Fan for eliminating bearing electric erosion

Technical Field

The utility model relates to the technical field of fans, in particular to a fan for eliminating bearing electric corrosion.

Background

In the existing IT equipment cooling system, a conventional means is to cool heat generating components using an axial flow fan. Because the service life of IT equipment is long, there is often a failure in heat dissipation of IT equipment due to performance degradation of the axial flow fan. Therefore, in designing an axial flow fan for heat dissipation of IT equipment, durability of the fan needs to be considered.

The existing axial flow fan has low requirements on service life and running environment, the impeller and the rotating shaft rotate, certain charges are generated on the rotating shaft, and bearing electric erosion phenomenon is generated on a bearing in direct contact with the rotating shaft, so that the bearing electric erosion affects the performance and service life of the fan. When bearing electric corrosion occurs, the rotation performance of the fan is often reduced, and the heat dissipation effect of the fan is affected, so that the cooling effect of IT equipment is affected; in extreme conditions, IT may occur that the IT equipment is overheated and stopped or damaged due to the non-rotation of the fan.

Disclosure of Invention

The utility model mainly solves the technical problem that bearing electric erosion phenomenon can be generated to influence the performance and service life of the fan in the axial flow fan in the prior art, and provides the fan for eliminating bearing electric erosion.

The utility model provides a fan for eliminating bearing electric erosion, which comprises: a fan housing, a rotor assembly, a stator assembly, and a circuit board; the rotor assembly comprises a rotating shaft and an impeller arranged on the rotating shaft;

an integrated mounting seat is arranged in the center of one axial side of the fan shell; an opening is reserved on the mounting seat;

a cylindrical bearing sleeve is arranged in the axial direction of the fan shell; the bearing sleeve is arranged on the inner side of the mounting seat;

a bearing for supporting the rotating shaft is arranged on the radial inner side of the bearing sleeve;

the silicon steel sheet is fixed on the radial outer side of the bearing sleeve, and the circuit board is provided with a conductive grounding spring sheet;

one end of the grounding spring plate passes through the opening of the mounting seat and is in contact with the periphery of the bearing sleeve.

Preferably, the end part of the grounding spring plate is in a shape of a C.

Preferably, the number of the grounding spring pieces is at least one; when the number of the grounding spring pieces is multiple, the grounding spring pieces are uniformly distributed in the circumferential direction.

Preferably, the grounding spring piece is far away from a control signal wire and a power supply end of the circuit board.

Preferably, the silicon steel sheet is annular and is clamped at the periphery of the bearing sleeve.

Preferably, the circuit board is sleeved on the mounting seat.

Preferably, an RC circuit is arranged on the circuit board.

According to the fan for eliminating bearing electric erosion, the grounding spring plate is arranged, so that shaft current generated by the rotating shaft flows to the grounding loop through the bearing, the bearing sleeve, the silicon steel sheet, the grounding spring plate and the circuit board; the shaft current generated by the rotating shaft is dredged, bearing electric erosion cannot be generated by the bearing, and the bearing electric erosion is eliminated by dredging the shaft current, so that the rotation performance of the fan is prevented from being reduced, and the service life of the fan is prolonged.

Drawings

FIG. 1 is a schematic diagram of a fan for eliminating bearing galvanic corrosion according to the present utility model;

FIG. 2 is a schematic diagram of the internal structure of a fan for eliminating bearing galvanic corrosion according to the present utility model;

FIG. 3 is a cross-sectional view of a fan for eliminating bearing galvanic corrosion provided by the present utility model;

fig. 4 is a schematic structural diagram of a circuit board provided by the present utility model.

Reference numerals: 1. a fan housing; 2. a circuit board; 3. a grounding spring plate; 4. a bearing sleeve; 5. a mounting base; 6. an insulating member; 7. a bearing; 8. silicon steel sheets; 9. a rotating shaft; 10. an impeller.

Detailed Description

In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects achieved clearer, the utility model is further described in detail below with reference to the accompanying drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the matters related to the present utility model are shown in the accompanying drawings.

As shown in fig. 1 to 3, a fan for eliminating bearing galvanic corrosion according to an embodiment of the present utility model includes: fan housing 1, rotor assembly, stator assembly and circuit board 2; the rotor assembly comprises a rotating shaft 9 and an impeller 10 mounted on the rotating shaft 9.

An integral mounting seat 5 is arranged in the center of one axial side of the fan casing 1; an opening is reserved on the mounting seat 5.

A cylindrical bearing sleeve 4 is arranged in the axial direction of the fan casing 1; the bearing sleeve 4 is arranged on the inner side of the mounting seat 5; the inner side wall of the mounting seat 5 is in contact with the outer side wall of one end of the bearing sleeve 4.

A bearing 7 for supporting the rotating shaft 9 is arranged radially inside the bearing sleeve 4;

the silicon steel sheet 8 is fixed on the radial outer side of the bearing sleeve 4; the silicon steel sheet 8 is annular and is clamped on the periphery of the bearing sleeve 4.

As shown in fig. 4, the circuit board 2 is provided with a conductive grounding spring sheet 3, and the grounding spring sheet 3 is welded on the circuit board 2; one end of the grounding spring plate 3 passes through the opening of the mounting seat 5 and is in contact with the periphery of the bearing sleeve 4. The end part of the grounding spring plate 3 is in a C shape, so that the grounding spring plate 3 can be contacted with the periphery of the bearing sleeve 4 more easily, and the assembly is convenient.

The number of the grounding spring pieces 3 is at least one; when the number of the grounding spring pieces 3 is plural, the plural grounding spring pieces 3 are uniformly distributed in the circumferential direction.

According to the utility model, the grounding spring plate 3 is arranged, so that shaft current generated by the rotating shaft 9 flows to a grounding loop through the bearing 7, the bearing sleeve 4, the silicon steel sheet 8, the grounding spring plate 3 and the circuit board 2. The shaft current generated by the rotating shaft 9 is dredged, bearing electric erosion cannot be generated by the bearing 7, and the bearing electric erosion is eliminated by dredging the shaft current, so that the rotation performance of the fan is prevented from being reduced, and the service life of the fan is prolonged.

The grounding spring plate 3 is far away from a control signal line of the circuit board 2, so that signal misjudgment is prevented; the grounding spring plate 3 is far away from the power end of the circuit board 2, so that the circuit board 2 is prevented from being burnt.

The circuit board 2 is sleeved on the mounting seat 5. An RC circuit (Resistor-Capacitance circuit, resistor-capacitor circuit) is disposed on the circuit board 2, and charges are absorbed by the RC circuit to reduce the shaft voltage.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments is modified or some or all of the technical features are replaced equivalently, so that the essence of the corresponding technical scheme does not deviate from the scope of the technical scheme of the embodiments of the present utility model.

Claims

1. A fan for eliminating bearing galvanic corrosion comprising: a fan housing (1), a rotor assembly, a stator assembly and a circuit board (2); the rotor assembly comprises a rotating shaft (9) and an impeller (10) arranged on the rotating shaft (9);

the method is characterized in that:

an integrated mounting seat (5) is arranged in the center of one axial side of the fan shell (1); an opening is reserved on the mounting seat (5);

a cylindrical bearing sleeve (4) is arranged in the axial direction of the fan casing (1); the bearing sleeve (4) is arranged on the inner side of the mounting seat (5);

a bearing (7) for supporting the rotating shaft (9) is arranged on the radial inner side of the bearing sleeve (4);

a silicon steel sheet (8) is fixed on the radial outer side of the bearing sleeve (4), and a conductive grounding spring sheet (3) is arranged on the circuit board (2);

one end of the grounding spring piece (3) passes through the opening of the mounting seat (5) and is in contact with the periphery of the bearing sleeve (4).

2. Fan for eliminating bearing galvanic corrosion according to claim 1, characterized in that the end of the grounding spring plate (3) is "C" -shaped.

3. Fan for eliminating bearing galvanic corrosion according to claim 1 or 2, characterized in that the number of grounded shrapnel (3) is at least one; when the number of the grounding spring pieces (3) is plural, the grounding spring pieces (3) are uniformly distributed in the circumferential direction.

4. A fan for eliminating bearing galvanic corrosion according to claim 3, characterized in that the grounding spring (3) is remote from the control signal line and the power supply end of the circuit board (2).

5. Fan for eliminating bearing galvanic corrosion according to claim 1, characterized in that the silicon steel sheet (8) is ring-shaped and is clamped at the periphery of the bearing sleeve (4).

6. Fan for eliminating bearing galvanic corrosion according to claim 1, characterized in that the circuit board (2) is sleeved on the mounting seat (5).

7. Fan for eliminating bearing galvanic corrosion according to claim 6, characterized in that the circuit board (2) is provided with an RC circuit.