Breathing machine fan rotor assembly
By setting front and rear balancing weights in the ventilator fan rotor assembly, the problem of uneven axial mass distribution of the rotor is solved, and stability and noise reduction are achieved during high-speed rotation of the rotor.
Patent Information
- Application Number
- CN202422246961.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-09-13
AI Technical Summary
The rotor structure of existing medical ventilators leads to uneven axial mass distribution, severe front-end swing of the rotor when rotating at high speed, excessive bearing load, and severe noise.
A front balancing weight and a rear balancing weight are set in the fan rotor assembly. The front balancing weight is set on the outer edge of the fan blade, and the rear balancing weight is a centrally symmetrical copper ring structure installed at the end of the rotor shaft. The cooperation of the two can achieve weight balance of the rotor assembly and reduce the swing of the front end of the rotor.
This achieves uniform axial mass distribution on the rotor, reduces swinging of the front end of the rotor, and reduces noise during fan operation.
Smart Images
Figure CN223469480U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to fan rotor's technical field especially relates to a breathing machine fan rotor subassembly. BACKGROUND
[0002] With the development of medical technology and people's growing demand for healthy life, the demand for medical breathing machine in the market is increasing, and the requirement for its reliability is increasingly rigorous, and vibration and noise problem is the problem that needs to be solved in the production process of medical breathing machine, and fan blade dynamic balance is an important link to solve this problem.
[0003] At present, the fan blade dynamic balance of medical breathing machine mainly includes rotor balance and fan blade balance. However, the rotor structure in the prior art makes the mass distribution of the rotor assembly mainly concentrated in the magnetic drive section and the fan blade section, resulting in uneven axial mass distribution of the rotor when rotating at high speed, serious swing of the front end of the rotor and excessive load of the bearing, thereby easily causing serious noise, so a new rotor assembly is designed to improve the above problems. SUMMARY
[0004] In order to solve the problems in the background art, the utility model provides a breathing machine fan rotor subassembly, which can make the axial mass distribution of the rotor more uniform when rotating at high speed, reduce the swing of the front end of the rotor, and thus reduce the noise generated when the fan works.
[0005] The utility model solves the technical problems and adopts the scheme: a breathing machine fan rotor subassembly, comprising a rotor shaft and a fan blade connected to the front end of the rotor shaft, a front balance counterweight is arranged at the outer edge of the fan blade for front end counterweight, a rear balance counterweight is arranged at the end of the rotor shaft away from the fan blade for rear end counterweight.
[0006] Further, the rear balance counterweight is a center-symmetrical structure, a connecting hole is arranged at the center of the rear balance counterweight, and the end of the rotor shaft is inserted into the connecting hole.
[0007] Further, the rear balance counterweight is a copper ring.
[0008] Further, the rear balance counterweight is a "T" shaped structure, comprising a connecting part and a counterweight part arranged at one end of the connecting part, the diameter of the counterweight part is greater than that of the connecting part and located outside the fan.
[0009] Further, the front side end face of the fan blade is provided with a plurality of blades, and the rear side end face of the fan blade is a flat surface, and the front balance counterweight is arranged at the edge of the rear side end face of the fan blade.
[0010] Further, the front balance counterweight is a circular ring structure, and a plurality of front balance counterweights are arranged, and each front balance counterweight is arranged concentrically.
[0011] Further, the fan blade center is provided with a plug hole, and the rotor shaft front end is fixedly plugged into the plug hole.
[0012] In conclusion, the utility model discloses the beneficial effect is: the utility model discloses a fan rotor assembly's fan blade edge is provided with the front balance counterweight component, and the last end of rotor shaft is provided with the rear balance counterweight component, and the weight of both ends of rotor assembly can keep balance, thereby when the fan blade high -speed rotation, the axial mass distribution of rotor can be more uniform, thereby can reduce the swing of the front end of rotor, and further reduce the noise generated when the fan works.
[0013] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, which can be implemented according to the content of the specification, and in order to let the above and other purposes, features and advantages of the utility model can be more obvious and easy to understand, the following preferred embodiments are taken, and the detailed description is as follows in cooperation with the drawings. DRAWINGS
[0014] Figure 1 It is the sectional view of this embodiment;
[0015] Figure 2 It is the structure schematic view of the counterweight block of this embodiment;
[0016] Figure 3 It is the structure schematic view of the pump blade of this embodiment;
[0017] Figure 4 It is the structure schematic view of this embodiment installed in the fan.
[0018] In the drawing: 1, rotor shaft;2, fan blade;21, blade;22, plug hole;3, front balance counterweight block;4, rear balance counterweight block;41, connecting hole;42, connecting part;43, counterweight part. DETAILED DESCRIPTION
[0019] In order to make the content of the utility model more easily be clearly understood, the following according to specific embodiment and combining with the drawings, the utility model is further explained.
[0020] It should be noted that the terms "center", "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and the like used herein indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. Unless otherwise stated, the meaning of "multiple" is two or more.
[0021] Unless otherwise defined, the terms "mounting", "connected", "connecting" are to be construed broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according of specific circumstances.
[0022] As shown in Figures 1 to 4 A ventilator fan rotor assembly can make the axial mass distribution of the rotor more uniform when the rotor rotates at high speed, reduce the swing of the front end of the rotor, and thus reduce the noise generated when the fan works. The rotor assembly of the embodiment comprises a rotor shaft 1 and a fan blade 2 connected to the front end of the rotor shaft 1. The rotor shaft 1 is installed in the fan and rotates under the action of a magnetic coil inside the fan, thereby driving the fan blade 2 connected to the front end of the rotor shaft 1 to rotate.
[0023] In order to improve the stability of the rotor assembly when it rotates, and thus reduce the noise when the fan works, the embodiment provides a front balance weight block 3 for front end counterweight at the outer edge of the fan blade 2, and a rear balance weight block 4 for rear end counterweight at the end of the rotor shaft 1, so that the two ends of the rotor assembly can be balanced under the action of the front balance weight block 3 and the rear balance weight block 4, thereby making the axial mass distribution of the rotor assembly more uniform when it rotates, reducing the vibration of the front fan blade 2 when the rotor assembly rotates, and further reducing the noise generated when the fan works.
[0024] As shown in Figure 1 and Figure 2 The rear balance weight block 4 of the embodiment is of a central symmetric structure, specifically a ring structure, so that when the rotor assembly rotates, the ring structure rear balance weight block 4 installed at the end of the rotor shaft 1 can rotate uniformly during rotation, thereby further improving the balance effect of the rotor assembly when it rotates, and thus reducing the noise. The center of the rear balance weight block 4 of the embodiment is provided with a connecting hole 41, and the end of the rotor shaft 1 can be inserted into the connecting hole 41 to realize the installation of the rear balance weight block 4. The installation method is convenient and easy to disassemble, thereby facilitating the replacement of the rear balance weight block 4 by the staff according to the actual balance condition of the rotor assembly.
[0025] Further, the rear balance weight block 4 of the embodiment is a copper ring with high density, so that the embodiment can realize the front and rear end balance of the rotor assembly with a small size, reducing the space required for counterweight and facilitating the miniaturization design of the product.
[0026] As shown in Figure 1 , Figure 2 and Figure 4As shown, the rear balance weight block 4 of the embodiment is a copper ring with a "T" shaped structure, specifically including a connecting portion 42 and a weight portion 43 arranged at one end of the connecting portion 42, wherein the diameter of the connecting portion 42 is smaller than the diameter of the weight portion 43, so that when the rear balance weight block 4 is installed, the connecting portion 42 can be inserted into the inside of the shell of the fan, and the weight portion 43 is located outside the fan, which not only makes the axial mass of the rotor assembly more uniform, improves the rotation stability of the fan, but also facilitates the disassembly and replacement of the rear balance weight block 4, so as to realize the stable rotation of the fan and reduce the noise.
[0027] As shown in Figure 1 and Figure 3 As shown, the center of the fan blade 2 is provided with an insertion hole 22, and the front end of the rotor shaft 1 can be inserted into the insertion hole 22 to realize the installation of the fan blade 2; the front side end surface of the fan blade 2 is provided with a plurality of blades 21, and the plurality of blades 21 are arranged in a conical structure, so that when the fan blade 2 rotates under the driving of the rotor shaft 1, the front end thereof can push the air to rotate to form an air flow; the rear side end surface of the fan blade 2 of the embodiment is a flat surface, and the front balance weight block 3 is circumferentially arranged at the edge position of the rear side end surface of the fan blade 2, so that the front balance weight block 3 can not only balance the front end of the rotor assembly, but also make the rotation of the fan blade 2 more stable, thereby reducing the noise generated by the rotation of the fan blade 2.
[0028] Specifically, the front balance weight block 3 of the embodiment is a circular ring structure, and the front balance weight block 3 is circumferentially arranged at the edge position of the rear side end surface of the fan blade 2 with the rotor shaft 1 as the rotation shaft, thereby realizing the balanced rotation of the fan blade 2. Wherein, the front balance weight block 3 of the embodiment can be provided with a plurality of front balance weight blocks 3, and each front balance weight block 3 is concentrically arranged and the diameters thereof are sequentially reduced, so that the worker can remove the corresponding front balance weight block 3 of the fan blade 2 according to the test result of the dynamic balancing machine during the balancing, and finally achieve the best rotation effect of the fan.
[0029] As shown above, the working principle of the embodiment is that the front balance weight assembly is arranged at the edge of the fan blade 2 of the fan rotor assembly, and the rear balance weight assembly is arranged at the end of the rotor shaft 1, so that the weight of the two ends of the rotor assembly can be balanced, thereby the axial mass distribution of the rotor can be more uniform when the fan blade 2 rotates at high speed, so as to reduce the swing of the front end of the rotor, and further reduce the noise generated during the operation of the fan.
[0030] The above-described embodiments are only preferred embodiments of the utility model, and cannot be used to limit the protection scope of the utility model, and any non-substantial changes and modifications made by the person skilled in the art on the basis of the utility model shall belong to the protection scope of the utility model.
Claims
1. A ventilator fan rotor assembly comprising a rotor shaft (1) and a fan blade (2) connected to the front end of the rotor shaft (1), characterized in that, The outer edge of the fan blade (2) is provided with a front balance weight (3) for front end counterbalance, and the end of the rotor shaft (1) away from the fan blade (2) is provided with a rear balance weight (4) for rear end counterbalance.
2. A ventilator blower rotor assembly as defined in claim 1, wherein, The rear balance weight (4) is a central symmetric structure, and the center of the rear balance weight (4) is provided with a connecting hole (41), and the end of the rotor shaft (1) is inserted into the connecting hole (41).
3. A ventilator blower rotor assembly as defined in claim 2, wherein, The rear balance weight (4) is a copper ring.
4. A ventilator blower rotor assembly as defined in claim 3, wherein, The cross section of the rear balance weight (4) is a "T" shaped structure, which comprises a connecting part (42) and a counterbalance part (43) provided at one end of the connecting part (42), and the diameter of the counterbalance part (43) is greater than that of the connecting part (42) and located at the outer side of the fan.
5. A ventilator blower rotor assembly as claimed in claim 1, wherein, The front side end surface of the fan blade (2) is provided with a plurality of blades (21), and the rear side end surface of the fan blade (2) is a flat surface, and the rear side end surface of the fan blade (2) is provided with a plurality of the front balance weights (3) circumferentially.
6. A ventilator blower rotor assembly as defined in claim 5, wherein, The front balance weight (3) is a circular ring structure, and a plurality of the front balance weights (3) are provided, and each of the front balance weights (3) is concentrically arranged.
7. A ventilator blower rotor assembly as claimed in claim 1, wherein, The center of the fan blade (2) is provided with an insertion hole (22), and the front end of the rotor shaft (1) is fixedly inserted into the insertion hole (22).