CN100461586C - Stator core bearing device - Google Patents

Abstract

The invention relates to a supporting device for supporting stator core 1 having level axis. The support of a stator core 1 comprises a pair of end retaining plates 2 fixed to the opposite ends of a stator core 1 having a horizontal axis and extending in the vertical direction, at least one resilient supporting plate 3 arranged below the stator core 1 in parallel with the axis and supporting the end retaining plates 2 while connecting them mutually, a resilient supporting seat 4 for supporting each resilient supporting plate 3 at least at two positions between the end retaining plates 2, and a fixed seat 6 for supporting the supporting seat 4. Axial position for mutually coupling the resilient supporting plate 3 and the resilient supporting seat 4 can be adjusted.

Description

Stator core bearing device

Technical field

The present invention relates to for example supporting arrangement of the stator core of motor of a kind of electric rotating machine, relate in particular to a kind of like this stator core bearing device, this supporting arrangement can reduce the vibration perpendicular on the axis direction that stator core produces to be transmitted to stator support.

Background technology

Fig. 5 is the partial view of the supporting structure of the stator core of existing electric rotating machine when observing perpendicular to axis direction.Fig. 6 is the local vertically cutaway view (with reference to Japanese publication No.2645189) along the line C-C of band arrow among Fig. 5.With the position of 20 one-tenth 30 ° to 65 ° of the vertical planes in stator core 1 axle center of the peripheral bottom of passing stator core 1, elastically supported plate 3 is fixed on the end pressing plate 2 of stator core.Each elastic bearing seat 4 is a V-arrangement, and its acute angle outwardly.One side of V-arrangement is fixed on the holder 6, and holder 6 is installed in the place, bottom of stator support 5, and the another side of V-arrangement is fixed on one of them of elastically supported plate 3.In the electric rotating machine that constitutes as mentioned above, when the electromagnetic force effect produces and vibrates between owing to stator core 1 and rotor, have flexible in direction perpendicular to axis.Therefore, the vibration of stator core 1 is absorbed and can not be transferred to stator support 5.

In the supporting arrangement of the stator core of above-mentioned existing electric rotating machine, natural frequency (character frequency) and from and the direction of axis normal be installed between the determined support stiffness in installation site on the elastically supported plate 3 by elastic bearing seat 4 when observing and have relation.In some cases, may resonate.

In addition, even under the situation that the natural frequency of the stator core supporting system of electric rotating machine itself and resonance frequency component separate, might change owing to the support height of stator core under the influence that rigidity is installed and resonate.In this case, the supporting arrangement of stator core must form again, for example by the reinforcement mode.

Summary of the invention

In order to address the above problem, the objective of the invention is be installed to by elastic bearing seat 4 installation site on the elastically supported plate 3 a kind of supporting arrangement of stator core is provided in definite support stiffness structure that can change easily, this supporting arrangement can be opened the natural frequency of stator core from the principal oscillation frequency halving of electric rotating machine.Like this, the natural frequency of stator core can be separated from the master drive frequency content of electric rotating machine.

According to an aspect of the present invention, a kind of supporting arrangement that is used to support stator core with horizontal axis, described supporting arrangement comprises: a pair of end pressing plate that is respectively fixed to the two ends of described stator core, and described end pressing plate is in the vertical direction extension and support described stator core; The lower position that is positioned in described stator core is parallel at least one elastically supported plate of described axis, described support plate be connected this between the pressing plate of end to support this to the end pressing plate; The elastic bearing seat, described at least one elastically supported plate is supported at least two some places that are used between the pressing plate of described end respectively; Be used to support the holder of described supporting base, wherein, described elastically supported plate is adjustable with the axial location that described elastic bearing seat combines.

According to a further aspect in the invention, a kind of supporting arrangement that is used to support the stator core of electric rotating machine is provided, described supporting arrangement comprises: elastically supported plate, described elastically supported plate is become 30 ° to 65 ° by attaching Cheng Yuyi vertical plane, described vertical plane passes the axle center with the described stator core of the bottom of the periphery of the movable cylindrical stator iron core that cooperates of the stator support of electric rotating machine, and described elastically supported plate is fixed on the end pressing plate of described stator core; The elastic bearing seat, each described elastic bearing seat is an acute angle V-arrangement shape outwardly, described elastic bearing seat is positioned in the place, both sides of the bottom of described stator core, and one side of V-arrangement is fixed to the bottom of described stator support, described elastic bearing seat supports described stator core at the another side of its V-arrangement by described elastically supported plate, wherein, the axial installation site of described elastically supported plate and described elastic bearing seat is adjustable.

According to the present invention, because the rigidity of elastically supported plate can change, the natural frequency of the whole supporting arrangement of stator core can change.Therefore, for example can be by natural frequency be separated with them with respect to two frequencys multiplication ± 10% of two frequencys multiplication of rotation synchronizing frequency, speed, supply frequency, thus prevent to resonate so that the electric rotating machine of small vibration is provided.

Description of drawings

Fig. 1 is when observing perpendicular to the direction of axis, and the local vertically view of an embodiment of the supporting arrangement of stator core of the present invention shows the part of this supporting arrangement axis below.

Fig. 2 is the local amplification sectional view that is intercepted along the line A-A among Fig. 1, shows the left-half in cross section.

Fig. 3 is the model schematic diagram of the supporting arrangement of stator core of the present invention.

Fig. 4 is the model schematic diagram of elastic reaction of elastically supported plate that shows the supporting arrangement of stator core of the present invention, and wherein (a) is the view of observing from perpendicular to the direction of axis, (b) is the sectional view that the line B-B from (a) is intercepted.

Fig. 5 is the local vertically view of the supporting structure of the stator core of existing electric rotating machine when observing perpendicular to axis direction.

Fig. 6 is the local amplification view along the line C-C of band arrow among Fig. 5.

Description of reference numerals

1: stator core

2: the end pressing plate

3: elastically supported plate

4: the elastic bearing seat

5: stator support

6: holder

21: bolt

22: bolt

24: screwed hole

25: screwed hole

26: tapped through hole

Embodiment

1 to 4 embodiment of supporting arrangement who describes the stator core of electric rotating machine of the present invention with reference to the accompanying drawings.Fig. 1 is the front view of the supporting arrangement of stator core of the present invention.Fig. 2 is a sectional view.

This electric rotating machine has horizontal axis of rotation.Holder 6 is soldered on the upper surface of the base of the lower end of stator support 5.On the upper surface of holder 6, by elastomeric material make by being bent angularly be the tabular elastic bearing seat 4 of 30 ° to 65 ° V-arrangement shape be placed forming V-shape acute angle outward, and utilize bolt 22 fixing.

The elastically supported plate of being made by the banded elastomeric material of sheet 3 is placed on the upper surface of elastic bearing seat 4, to extend axially for 20 one-tenth 30 ° to 65 ° with the vertical plane that passes the axle center.The bolt 21 that elastically supported plate 3 is inserted from the rear surface of elastic bearing seat 4 is fixing.The two ends of each elastically supported plate 3 all are fixed by welding to end pressing plate 2.End pressing plate 2 vertically stands in the two ends of stator core 1.

The natural frequency f of the supporting arrangement of the stator core 1 of Gou Chenging utilizes model shown in Figure 3 to be provided by formula (1) as mentioned above.

$f=\frac{1}{\mathrm{\&pi;}}\sqrt{\frac{k_1({\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="C200510125492E00091.png,C200510125492E00093.png"\; state="\{\{state\}\}">L</figure-callout>}}_1,I_1)\&CenterDot;k_2({\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="C200510125492E00091.png,C200510125492E00092.png"\; state="\{\{state\}\}">L</figure-callout>}}_2,I_2)}{M\{k_1({\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="C200510125492E00091.png,C200510125492E00093.png"\; state="\{\{state\}\}">L</figure-callout>}}_1,I_1)+2k_2({\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="C200510125492E00091.png,C200510125492E00092.png"\; state="\{\{state\}\}">L</figure-callout>}}_2,I_2)\}}}\left(\mathrm{Hz}\right)---\left(1\right)$

Wherein, M: the quality of stator core (kg)

k ₁: the elastic stiffness of elastically supported plate (every, N/m)

L ₁: elastic bearing seat installation site on the elastically supported plate and the distance (m) between the pressing plate of end, (in other words conj.or perhaps elastically supported plate 3 is connected on the end pressing plate 2 tie point to the axial distance at the center of elastic bearing seat 4)

I ₁: the geometrical moment of inertia (m of elastically supported plate ⁴)

K ₂: the elastic stiffness of elastic bearing seat (every, N/m)

L ₂: the distance between the supporting point of elastic bearing seat (m), (or perhaps the tie point of elastically supported plate 3 and elastic bearing seat 4 is to the distance between the summit of elastic bearing seat 4)

I ₂: the geometrical moment of inertia (m of elastic bearing seat ⁴)

The elastic stiffness k of elastically supported plate 3 ₁Utilize model shown in Figure 4 to provide by formula (2).

${\mathrm{<figure-callout\; id="1"\; label="k"\; filenames="C200510125492E00091.png,C200510125492E00093.png"\; state="\{\{state\}\}">k</figure-callout>}}_1=\frac{24E{I}_1{L}^3}{{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="C200510125492E00091.png,C200510125492E00093.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}^3(54{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="C200510125492E00091.png,C200510125492E00093.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}^3-27{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="C200510125492E00091.png,C200510125492E00093.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}^{2}L-3L_1{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="C200510125492E00091.png,C200510125492E00092.png"\; state="\{\{state\}\}">L</figure-callout>}}^2+2L^3)}(N/m)---\left(2\right)$

Wherein, I ₁=bh ³/ 12 (m ⁴), L: the total length of elastically supported plate (m).

Therefore, can be by the installation site of the elastic bearing seat 4 on the change elastically supported plate 3 and the distance L between the end pressing plate 2 ₁Change the elastic stiffness of elastically supported plate 3, thereby regulate the natural frequency of the supporting arrangement of stator core 1.In addition, if the thickness of elastically supported plate 3 or change width, then its geometrical moment of inertia changes, thereby can regulate elastic stiffness.But if the thickness of elastically supported plate 3 or width increase, then quality increases.On the contrary, if the thickness of elastically supported plate 3 or width reduce to reduce elastic stiffness, then axial rigidity also reduces.Therefore, it is very complicated that it regulates operation.On the other hand, change the installation site of elastic bearing seat 4 and the distance L between the end pressing plate 2 ₁Fairly simple, unnecessary change quality and axial rigidity regulate easily like this.

The a plurality of screwed holes 24,25 that are used for fixing elastic bearing seat 4 in each elastically supported plate 3 and each holder 6 are being axially aligned, and make to change length L easily by selecting only screwed hole ₁In Fig. 1, only screwed hole 25 is shown by center line.Owing to only realize accurately regulating, on elastic bearing seat 4, form vertically through hole 26 for elongated slotted hole to realize accurate adjusting by selecting screwed hole to be difficult to.

In said structure,, also can change the rigidity of stator core supporting system easily even the influence of the installation rigidity of electric rotating machine causes vibration.Therefore, can be easy to avoid resonance, thereby reduce vibration.In addition, in said structure, the relative position relation between elastically supported plate 3 and the stator support 5 etc. remains unchanged, and has only relative their position of elastic bearing seat 4 to change.Therefore, stator core 1 grade does not change with respect to the relative position of stator support 5, except the change in location of consideration elastic bearing seat 4 and getting in touch of rigidity adjusting, needn't consider other variation.

In the above description, describe the example that has two elastically supported plates and four elastic bearing seats about a stator core, still, when the quantity of elastically supported plate and elastic bearing seat changes, also can obtain same effect.

Claims (1)

1. supporting arrangement that is used to support stator core with horizontal axis, described supporting arrangement comprises:

The a pair of end pressing plate that is respectively fixed to the two ends of described stator core, described end pressing plate is in the vertical direction extension and support described stator core;

The lower position that is positioned in described stator core is parallel at least one elastically supported plate of described axis, described elastically supported plate is become with the vertical plane in the axle center of passing described stator core to become 30 ° to 65 ° by attaching in the peripheral bottom with the movable columnar described stator core that cooperates of the stator support of electric rotating machine, described support plate be connected this between the pressing plate of end to support this to the end pressing plate;

The elastic bearing seat, described at least one elastically supported plate is supported at least two some places that are used between the pressing plate of described end respectively, each described elastic bearing seat is an acute angle V-arrangement shape outwardly, described elastic bearing seat is positioned in the place, both sides of the bottom of described stator core, and one side of V-arrangement is fixed to the bottom of described stator support, and described elastic bearing seat supports described stator core at the another side of its V-arrangement by described elastically supported plate;

Be used to support the holder of described elastic bearing seat, wherein,

Described elastically supported plate is adjustable with the axial location that described elastic bearing seat combines, the axial location that described elastic bearing seat combines with described holder is adjustable, and can regulate the axial location of described elastic bearing seat and do not change relative axial position relation between described elastically supported plate and the described holder.

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