WO2015043371A1 - 板弹簧和板弹簧组以及压缩机 - Google Patents

板弹簧和板弹簧组以及压缩机 Download PDF

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Publication number
WO2015043371A1
WO2015043371A1 PCT/CN2014/086056 CN2014086056W WO2015043371A1 WO 2015043371 A1 WO2015043371 A1 WO 2015043371A1 CN 2014086056 W CN2014086056 W CN 2014086056W WO 2015043371 A1 WO2015043371 A1 WO 2015043371A1
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WIPO (PCT)
Prior art keywords
leaf spring
spring
concentric
fixing hole
arm
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PCT/CN2014/086056
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English (en)
French (fr)
Inventor
黄辉
胡余生
魏会军
崔中
黄建平
黄传顺
陈柱锦
梁苡铭
Original Assignee
珠海格力节能环保制冷技术研究中心有限公司
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Application filed by 珠海格力节能环保制冷技术研究中心有限公司 filed Critical 珠海格力节能环保制冷技术研究中心有限公司
Priority to JP2016544708A priority Critical patent/JP6663853B2/ja
Priority to US15/026,012 priority patent/US9810278B2/en
Priority to EP14847938.9A priority patent/EP3054188B1/en
Priority to KR1020167011414A priority patent/KR102004888B1/ko
Publication of WO2015043371A1 publication Critical patent/WO2015043371A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/18—Leaf springs
    • F16F1/185—Leaf springs characterised by shape or design of individual leaves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/18—Leaf springs
    • F16F1/185—Leaf springs characterised by shape or design of individual leaves
    • F16F1/187—Leaf springs characterised by shape or design of individual leaves shaped into an open profile, i.e. C- or U-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/01—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being mechanical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/025—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant characterised by having a particular shape
    • F16F1/027—Planar, e.g. in sheet form; leaf springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/18—Leaf springs
    • F16F1/20—Leaf springs with layers, e.g. anti-friction layers, or with rollers between the leaves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/18—Leaf springs
    • F16F1/26—Attachments or mountings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
    • F16F3/02—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of steel or of other material having low internal friction
    • F16F3/023—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of steel or of other material having low internal friction composed only of leaf springs

Definitions

  • the present invention relates to the field of spring technology, and in particular to a leaf spring group composed of a leaf spring and a plurality of leaf springs and a compressor including the same.
  • Plate spring support technology is one of the key technologies of linear compressors. Compared with the traditional cylindrical spring, the leaf spring has a large radial stiffness, so that the piston does not have radial displacement due to vibration during the movement, avoiding direct contact between the piston and the cylinder; and the axial stiffness of the leaf spring Far less than its radial stiffness allows the piston to reciprocate freely in the cylinder.
  • Patent No. JP2003247580 (A) discloses a scroll arm spring
  • the patent No. CN201010248988.5 discloses a linear arm spring and a scroll arm spring, the scroll arm springs disclosed in the two patents.
  • the present invention provides a leaf spring having a small equivalent mass.
  • the present invention also provides a leaf spring group comprising the leaf spring of the present invention, and a compressor comprising the leaf spring group.
  • a leaf spring comprising at least two spring arms and an inner fixing hole, the at least two spring arms being evenly distributed around the inner fixing hole; each of the spring arms has the same structure, and each of the An outer fixing hole is provided at the outermost end of the spring arm.
  • each of the spring arms is formed by tangentially cutting a plurality of pairs of concentric arcs, the plurality of pairs of concentric arcs gradually increasing from inner to outer radius, and the end of the spring arm is the largest one A concentric arc and a circular arc concentric with the outer fixing hole are formed.
  • the plurality of pairs of concentric arcs have a radius of from 1 mm to 500 mm.
  • the spring arm has a width of 5 mm to 50 mm.
  • each of the spring arms is comprised of two concentric vortex lines, the two concentric vortex lines being a first vortex line and a second vortex line; the beginning end of the spring arm Starting from and ending with the two concentric vortex lines The inner fixing hole is connected by a concentric arc; the end of the spring arm is formed by cutting a 2 to 3 arcs and the two concentric vortex lines, and the endmost arc and the outer fixing Holes are concentric.
  • the beginning ends of the two concentric vortex lines and the arcs concentric with the inner fixing holes are connected by a first circular arc and a second circular arc, and both ends of the first circular arc Tangentially intersecting the first vortex line and an arc concentric with the inner fixing hole, the two ends of the second arc are respectively concentric with the second vortex line and the inner fixing hole
  • the arc is tangent.
  • the two concentric vortices respectively satisfy the equation:
  • X and Y are point coordinates, a and a+b are radius coefficients, t is a variable, ⁇ is the starting angle, and 0.5 ⁇ a ⁇ 30, 0 ⁇ b ⁇ 10, 0rad ⁇ t ⁇ 30rad, 0rad ⁇ ⁇ 150rad.
  • the leaf spring has a thickness of 0.1 mm to 5 mm, and the ratio of the maximum outer diameter of the leaf spring to its thickness is 5 to 5000.
  • the arms of each of the spring arms are of equal width.
  • the arm width of each of the spring arms gradually increases from the inside to the outside, and the ratio of the maximum width to the minimum width is greater than 1, and less than or equal to 10.
  • the present invention also provides a leaf spring assembly comprising at least two of said leaf springs, a gasket being disposed between said leaf springs.
  • the invention also provides a compressor comprising the set of leaf springs.
  • the leaf spring provided by the invention adopts the structure of the concentric multi-circular arm and the concentric scroll arm, has a small equivalent quality, and avoids the requirement of rigidity and natural frequency by increasing the quality of the component, thereby reducing the product quality. , saving costs.
  • the leaf spring assembly provided by the present invention is used by stacking a plurality of the above-mentioned leaf springs to improve the rigidity between the relatively moving parts.
  • the compressor provided by the invention by adopting the leaf spring group of the invention, improves the rigidity between the relatively moving parts and reduces the quality of the product.
  • Figure 1 is a schematic structural view of a spring vibration system
  • FIG. 2 is a schematic structural view of an embodiment of a leaf spring according to the present invention.
  • FIG. 3 is a schematic structural view of another embodiment of a leaf spring according to the present invention.
  • FIG. 4 is a schematic structural view of another embodiment of a leaf spring according to the present invention.
  • Figure 5 is a plan view showing an embodiment of a compressor of the present invention.
  • Figure 6 is a plan sectional view of the compressor shown in Figure 5;
  • Figure 7 is a plan view of the compressor shown in Figure 5;
  • Figure 8 is a side view of the compressor shown in Figure 5;
  • Figure 9 is a perspective cross-sectional view of the compressor shown in Figure 5.
  • the displacement of the section at the coordinate of the spring is x
  • the mass of the spring segment of length dx is m s dx/l
  • the kinetic energy of the spring is So the whole system kinetic energy is
  • the reference kinetic energy of the entire system is
  • T max ⁇ n 2 T ref
  • a is the elongation of the spring
  • k the stiffness coefficient of the spring
  • ⁇ n is the vibration frequency of the spring.
  • the equivalent mass is By analyzing the model of the leaf spring by CAE simulation, the axial stiffness k and the natural frequency ⁇ d of the axial vibration can be obtained, so that the equivalent mass in the whole vibration system can be obtained.
  • the equivalent mass of the leaf spring is determined by the actual structure of the leaf spring, that is, by the natural frequency and axial stiffness of the leaf spring.
  • the arm width ratio of the conventional leaf spring arm or the like concentric swirl about 50%, eccentric scroll spring arm plate this ratio will be greater, but the present invention is by varying the structure of the plate spring, and the like, for example, to reduce the ratio m / m s by possession of a plate spring material structure of the intermediate portion is reduced, it is reduced to 25% 50%.
  • the present invention provides a leaf spring comprising at least two spring arms and an inner fixing hole, all of which are evenly distributed around the inner fixing hole; each spring arm has the same structure And an outer fixing hole is disposed at an outermost end of each spring arm.
  • the spring arms may be two or three, and the leaf springs may be equal arm wide leaf springs. It can also be an unequal arm wide leaf spring, or the spring arm can be composed of a circular arc or a vortex line. The following are introduced separately.
  • the leaf spring in this embodiment is an arm wide leaf spring such as a concentric multi-circle arm.
  • the leaf spring 100 in this embodiment includes an inner fixing hole 110 and spring arms 120, 130.
  • the spring arms 120 and 130 are symmetrically distributed around the inner fixing hole 110; the spring arms 120 and 130 have the same structure,
  • the leaf spring 100 will be described by taking the spring arm 120 as an example.
  • the spring arm 120 is provided with an outer fixing hole 122 for fixing the leaf spring 100; the spring arm 120 is formed by tangential cutting of a plurality of pairs of concentric arcs, as shown in FIG. 2, a plurality of pairs of concentric arcs gradually increase from the inner side to the outer radius It can be increased from 1mm to 500mm; the end of the spring arm 120 is formed by the arc 124 and the pair of concentric arcs having the largest radius, the arc 124 is concentric with the outer fixing hole 122, and the diameter of the arc 124 is equal to the spring
  • the arm width of the arm 120 (the difference between the radii of a pair of concentric arcs is the arm width of the spring arm); in the present embodiment, the arm arms 120 have the same arm width.
  • the spring arm 120 has a width of 5 mm to 50 mm; the leaf spring 100 has a thickness of 0.1 mm to 5 mm and a maximum outer diameter to thickness ratio of 5 to 5,000.
  • FIG. 3 is another embodiment of the leaf spring provided by the present invention.
  • the leaf spring in this embodiment is a concentric multi-circle arm unequal arm wide plate spring.
  • the leaf spring 200 in this embodiment includes an inner fixing hole 210 and spring arms 220 and 230.
  • the spring arms 220 and 230 are evenly distributed around the inner fixing hole 210; the spring arms 220 and 230 have the same structure, and the spring arm 220 is exemplified below.
  • the leaf spring 200 will be described.
  • the spring arm 220 is provided with an outer fixing hole 222 for fixing the leaf spring 200; the spring arm 220 is formed by tangential cutting of a plurality of pairs of concentric arcs, as shown in FIG. 3, a plurality of pairs of concentric arcs gradually increase from the inner side to the outer radius It can be increased from 1 mm to 500 mm, and the end of the spring arm 220 is formed by the circular arc 224 and a pair of concentric arcs having the largest radius, and the circular arc 224 is concentric with the outer fixing hole 222.
  • the arm widths of the spring arms 220 are not equal.
  • the width of the spring arms 220 gradually increases, and the ratio of the maximum width to the minimum width is greater than 1, and less than or equal to 10.
  • the spring arm 220 has a width of 5 mm to 50 mm; the leaf spring 100 has a thickness of 0.1 mm to 5 mm and a maximum outer diameter to thickness ratio of 5 to 5,000.
  • the leaf spring in this embodiment is a concentric scroll arm unequal arm wide plate spring.
  • the leaf spring 300 in this embodiment includes an inner fixing hole 310 and spring arms 320, 330 and 340.
  • the three spring arms are evenly distributed around the inner fixing hole 310; the spring arms 320, 330 and 340 have the same structure, and the spring arms 320 are arranged below.
  • the plate spring 300 will be described as an example.
  • the spring arm 320 is provided with an outer fixing hole 322; the spring arm 320 is composed of two concentric vortex lines, that is, a first vortex line 324 and a second vortex line 326; the starting end of the spring arm 320 is composed of a first vortex line 324 The beginning of the second vortex line 326 It is connected with an arc that is concentric with the inner fixing hole 310.
  • the first vortex line 324 and the circular arc concentric with the inner fixing hole 310 are connected by the first circular arc 328, and the two ends of the first circular arc 328 are respectively fixed to the beginning and the inner end of the first vortex line 324.
  • the hole 310 is tangent to the concentric arc, and the second vortex 326 and the arc concentric with the inner fixing hole 310 are connected by the second arc 329, and the two ends of the second arc 329 and the second vortex are respectively
  • the starting end is tangent to the arc concentric with the inner fixing hole 310;
  • the end of the spring arm 320 is formed by cutting the arc of 2 to 3 arcs with the concentric vortex lines 324 and 326, and the arc 327 at the end is concentric with the outer fixing hole.
  • the first vortex line 324 and the second vortex line 326 satisfy the following equations, respectively:
  • X and Y point coordinates, a and a+b are radius coefficients, t is a variable, ⁇ is the starting angle, and 0.5 ⁇ a ⁇ 30, 0 ⁇ b ⁇ 10, 0rad ⁇ t ⁇ 30rad, 0rad ⁇ a ⁇ 150rad.
  • the arm width of the spring arm 320 gradually increases from the inside to the outside, and the ratio of the maximum width to the minimum width is greater than 1, and is less than or equal to 10.
  • the plate spring 300 has a thickness of 0.1 mm to 5 mm and a ratio of a maximum outer diameter to a thickness of 5 to 5,000.
  • the leaf spring provided by the invention adopts the structure of the concentric multi-circular arm and the concentric scroll arm, and has a small equivalent mass (25% to 50%), thereby avoiding the rigidity and the natural frequency by increasing the mass of the component.
  • the requirement is to reduce the product quality and save the cost; at the same time, under the same outer diameter, the structure has a large linear working range, which is favorable for the compactness of the leaf spring structure.
  • the present invention also provides a leaf spring assembly 000 comprising at least two of the above leaf springs.
  • a plurality of the above-mentioned leaf springs are stacked and used to increase the rigidity between the relatively moving members.
  • the spacers 400 are disposed between adjacent leaf springs.
  • the present invention also provides a compressor comprising the above-described leaf spring group 000, and a spacer 400 of a certain thickness and shape is added between the leaf springs of the leaf spring group 000.
  • the spacer 400 is disposed at a fixed portion of the leaf spring group. The addition of the spacer 400 on the one hand reduces the concentrated stress at the fixed portion of the leaf spring group 000, and on the other hand prevents frictional wear between adjacent leaf springs, prolonging the service life of the leaf spring group 000.

Abstract

一种板簧（100），包括至少两条弹簧臂（120，130）和一个内固定孔（110），至少两条弹簧臂（120，130）以内固定孔（110）为中心均匀分布；每条弹簧臂的结构相同，且每条弹簧臂的最外端上设置有外固定孔（122）。还提供了一种板弹簧组和压缩机，板弹簧组包括多个板弹簧，压缩机包括该板弹簧组。提供的板弹簧采用同心多圆臂和同心涡旋臂的结构，具有较小的等效质量，避免了通过增加零部件的质量来满足刚度和固有频率的要求，减轻了产品质量，节约了成本。

Description

板弹簧和板弹簧组以及压缩机
相关申请
本专利申请要求2013年9月30日申请的，申请号为201310459756.8，名称为“板弹簧和板弹簧组以及压缩机”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本发明涉及弹簧技术领域，特别是涉及一种板弹簧和多个板弹簧组成的板弹簧组以及包含该板弹簧组的压缩机。
背景技术
板弹簧支撑技术是线性压缩机的关键技术之一。相对于传统的圆柱弹簧，板弹簧具有较大的径向刚度，使得活塞在运动中不会由于振动而产生径向位移，避免了活塞和气缸之间的直接接触；且板弹簧的轴向刚度远小于其径向刚度，可以使活塞在气缸中自由的往复运动。专利号为JP2003247580(A)的专利公开了涡旋臂板弹簧，专利号为CN201010248988.5的专利公开了直线臂板弹簧和涡旋臂板弹簧，这两个专利里公开的涡旋臂板弹簧都存在以下问题：板弹簧的等效质量过大，为满足刚度和固有频率要求，会增加零部件的质量。
发明内容
本发明提供了一种板弹簧，具有较小的等效质量。同时，本发明还提供了一种包含本发明板弹簧的板弹簧组，以及一种包含该板弹簧组的压缩机。
本发明的技术方案如下：
一种板弹簧，包括至少两条弹簧臂和一个内固定孔，所述至少两条弹簧臂以所述内固定孔为中心均匀分布；每条所述弹簧臂的结构相同，且每条所述弹簧臂的最外端上设置有外固定孔。
在其中一个实施例中，每条所述弹簧臂由若干对同心圆弧相切而成，所述若干对同心圆弧由内向外半径逐渐增大，所述弹簧臂的末端由半径最大的一对同心圆弧和与所述外固定孔同心的圆弧相切而成。
在其中一个实施例中，所述若干对同心圆弧的半径为1mm～500mm。
在其中一个实施例中，所述弹簧臂的宽度为5mm～50mm。
在其中一个实施例中，每条所述弹簧臂由两条同心涡旋线组成，所述两条同心涡旋线为第一涡旋线和第二涡旋线；所述弹簧臂的起始端由所述两条同心涡旋线的始端和与所述 内固定孔同心的圆弧相连接而成；所述弹簧臂的末端由2至3段圆弧与所述两条同心涡旋线相切而成，且最末端的圆弧与所述外固定孔同心。
在其中一个实施例中，所述两条同心涡旋线的始端和与所述内固定孔同心的圆弧通过第一圆弧和第二圆弧相连接，所述第一圆弧的两端分别与所述第一涡旋线和与所述内固定孔同心的圆弧相切，所述第二圆弧的两端分别与所述第二涡旋线和与所述内固定孔同心的圆弧相切。
在其中一个实施例中，所述两条同心涡旋线分别满足方程：
X(t)＝a*[cos(t)+t*sin(t)]，
Y(t)＝a*[sin(t)-t*cos(t)]；
及方程
X(t)＝(a+b)*[cos(t)+(t+α)*sin(t)]，
Y(t)＝(a+b)*[sin(t)-(t+α)*cos(t)]；
其中，X和Y为点坐标，a和a+b为半径系数，t为变量，α为起始角，且0.5≤a≤30，0＜b≤10，0rad＜t≤30rad，0rad＜α≤150rad。
在其中一个实施例中，所述板弹簧的厚度为0.1mm～5mm，且所述板弹簧的最大外径与其厚度的比值为5～5000。
在其中一个实施例中，每条所述弹簧臂的臂宽相等。
在其中一个实施例中，每条所述弹簧臂的臂宽由内向外逐渐增大，最大宽度与最小宽度之比大于1，且小于或等于10。
本发明还提供了一种板弹簧组，包括至少两个所述的板弹簧，所述板弹簧之间设置有垫片。
本发明还提供了一种压缩机，包括所述的板弹簧组。
本发明提供的板弹簧，采用同心多圆臂和同心涡旋臂的结构，具有较小的等效质量，避免了通过增加零部件的质量来满足刚度和固有频率的要求，从而减轻了产品质量，节约了成本。本发明提供的板弹簧组，由多个上述板弹簧叠在一起使用，可提高相对运动部件之间的刚度。本发明提供的压缩机，由于采用本发明的板弹簧组，提高了相对运动部件之间的刚度，减轻了产品的质量。
附图说明
图1为弹簧振动系统的结构示意图；
图2为本发明板弹簧的一实施例的结构示意图；
图3为本发明板弹簧的另一实施例的结构示意图；
图4为本发明板弹簧的另一实施例的结构示意图；
图5为本发明压缩机的一实施例的平面图；
图6为图5所示的压缩机的平面剖视图；
图7为图5所示的压缩机的俯视图；
图8为图5所示的压缩机的侧视图；
图9为图5所示的压缩机的立体剖视图。
具体实施方式
首先对板弹簧的等效质量做一个说明：
如图1所示的弹簧质量振动系统。设弹簧的质量为ms，静平衡时长为l，振动中弹簧的端部位移为u(t)。根据材料力学中直杆拉压静位移沿杆呈线性分布的结论，可近似认为弹簧的振动位移分布是线性的。因此，弹簧上坐标为x处截面的位移是
Figure PCTCN2014086056-appb-000001
长度为dx的弹簧段质量为msdx/l，于是弹簧的动能是
Figure PCTCN2014086056-appb-000002
所以整个系统动能为
Figure PCTCN2014086056-appb-000003
整个系统的参考动能为
Figure PCTCN2014086056-appb-000004
且Tmax＝ωn 2Tref，整个系统的最大势能为
Figure PCTCN2014086056-appb-000005
由机械能守恒条件Tmax＝Vmax可得
Figure PCTCN2014086056-appb-000006
其中，a为弹簧的伸长量，k为弹簧的劲度系数，ωn为弹簧的振动频率。由以上可得
Figure PCTCN2014086056-appb-000007
当m＝0时，有
Figure PCTCN2014086056-appb-000008
m等为弹簧在振动系统中的等效质量，ωd为弹簧的固有频率。同理对于板弹簧，其等效质量为通过CAE模拟对板弹簧的模型进行分析可以得到其轴向刚度k和轴向振动的固有频率ωd，从而可得到其在整个振动系统中的等效质量。
由以上可知，板弹簧的等效质量由板弹簧的实际结构决定，即由板弹簧的固有频率和轴向刚度决定。我们希望板弹簧的等效质量m等与板弹簧的质量ms之比越小越好，现有的同心涡旋臂等臂宽板弹簧的这个比值在50％左右，偏心涡旋臂板弹簧的这个比值会更大，而本发明通过改变板弹簧的结构，例如通过减小板弹簧结构中间部分的材料的占有量来减小m等/ms的比值，使其减小到25％～50％。
参见图2至图4，本发明提供了一种板弹簧，该板弹簧包括至少两条弹簧臂和一个内固定孔，所有的弹簧臂以内固定孔为中心均匀分布；每条弹簧臂的结构相同，且每条弹簧臂的最外端上设置有外固定孔。
较优的，所述弹簧臂可以为两条也可以为三条，所述的板弹簧可以为等臂宽板弹簧， 也可以为不等臂宽板弹簧，或者弹簧臂可以由圆弧组成，也可以由涡旋线组成。以下分别介绍。
实施例1
图2为本发明提供的板弹簧的一个实施例，本实施例中的板弹簧为同心多圆臂等臂宽板弹簧。本实施例中的板弹簧100包括内固定孔110和弹簧臂120、130，在本实施例中，弹簧臂120和130以内固定孔110为中心对称分布；弹簧臂120和130的结构相同，下面以弹簧臂120为例对板弹簧100加以说明。
弹簧臂120上设置有外固定孔122，用于固定板弹簧100；弹簧臂120由若干对同心圆弧相切而成，如图2所示，若干对同心圆弧由内向外半径逐渐增大，可以从1mm增大到500mm；弹簧臂120的末端由圆弧124与半径最大的一对同心圆弧相切而成，圆弧124与外固定孔122同心，且圆弧124的直径等于弹簧臂120的臂宽(同心的一对圆弧的半径之差即为弹簧臂的臂宽)；在本实施例中，弹簧臂120的臂宽相等。较佳地，弹簧臂120的宽度为5mm～50mm；板弹簧100的厚度为0.1mm～5mm，其最大外径与厚度比值为5～5000。
实施例2
图3为本发明提供的板弹簧的另一个实施例，本实施例中的板弹簧为同心多圆臂不等臂宽板弹簧。本实施例中的板弹簧200包括内固定孔210和弹簧臂220、230，弹簧臂220和230以内固定孔210为中心均匀分布；弹簧臂220和230的结构相同，下面以弹簧臂220为例对板弹簧200加以说明。
弹簧臂220上设置有外固定孔222，用于固定板弹簧200；弹簧臂220由若干对同心圆弧相切而成，如图3所示，若干对同心圆弧由内向外半径逐渐增大，可以从1mm增大到500mm，弹簧臂220的末端由圆弧224与半径最大的一对同心圆弧相切而成，圆弧224与外固定孔222同心。弹簧臂220的臂宽不相等，由内到外，弹簧臂220的宽度逐渐增加，最大宽度与最小宽度之比大于1，且小于或等于10。较佳地，弹簧臂220的宽度为5mm～50mm；板弹簧100的厚度为0.1mm～5mm，其最大外径与厚度比值为5～5000。
实施例3
图4为本发明提供的板弹簧的另一个实施例，本实施例中的板弹簧为同心涡旋臂不等臂宽板弹簧。本实施例中的板弹簧300包括内固定孔310和弹簧臂320、330和340，三条弹簧臂以内固定孔310为中心均匀分布；弹簧臂320、330和340的结构相同，下面以弹簧臂320为例对板弹簧300加以说明。
弹簧臂320上设置有外固定孔322；弹簧臂320由两条同心涡旋线即第一涡旋线324和第二涡旋线326组成；弹簧臂320的起始端由第一涡旋线324、第二涡旋线326的始端 和与内固定孔310同心的圆弧相连接而成。优选地，第一涡旋线324和与内固定孔310同心的圆弧通过第一圆弧328相连接，第一圆弧328的两端分别与第一涡旋线324的始端和与内固定孔310同心的圆弧相切，第二涡旋线326和与内固定孔310同心的圆弧通过第二圆弧329相连接，第二圆弧329的两端分别与第二涡旋线的始端和与内固定孔310同心的圆弧相切；弹簧臂320的末端由2至3段圆弧与同心涡旋线324和326相切而成，最末端的圆弧327与外固定孔同心。第一涡旋线324和第二涡旋线326分别满足以下方程：
X(t)＝a*[cos(t)+t*sin(t)]，
Y(t)＝a*[sin(t)-t*cos(t)]；及方程
X(t)＝(a+b)*[cos(t)+(t+α)*sin(t)]，
Y(t)＝(a+b)*[sin(t)-(t+α)*cos(t)]；
其中，X和Y点坐标，a和a+b为半径系数，t为变量，α为起始角，且0.5≤a≤30，0＜b≤10，0rad＜t≤30rad，0rad＜a≤150rad。
如图4所示，弹簧臂320的臂宽由内到外逐渐增大，最大宽度与最小宽度之比大于1，且小于或等于10。板弹簧300的厚度为0.1mm～5mm，其最大外径与厚度的比值为5～5000。
本发明提供的板弹簧，采用同心多圆臂和同心涡旋臂的结构，具有较小的等效质量(25％～50％)，避免了通过增加零部件的质量来满足刚度和固有频率的要求，从而减轻了产品质量，节约了成本；同时，在同等外径下，该结构具有较大的线性工作范围，利于板弹簧结构的紧凑化。
本发明还提供了一种板弹簧组000，包括至少两个上述板弹簧。多个上述板弹簧叠在一起使用，可提高相对运动部件之间的刚度，优选地，相邻板弹簧之间设置有垫片400。
参见图5至图9，本发明还提供了一种压缩机，包括上述的板弹簧组000，且板弹簧组000的板弹簧之间加入一定厚度和形状的垫片400。较优地，垫片400设置在板弹簧组的固定处。垫片400的加入一方面减小了板弹簧组000的固定处的集中应力，另一方面防止了相邻板弹簧之间的摩擦磨损，延长了板弹簧组000的使用寿命。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本实用新型构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (12)

  1. 一种板弹簧，其特征在于，包括至少两条弹簧臂和一个内固定孔，所述至少两条弹簧臂以所述内固定孔为中心均匀分布；每条所述弹簧臂的结构相同，且每条所述弹簧臂的最外端上设置有外固定孔。
  2. 根据权利要求1所述的板弹簧，其特征在于，每条所述弹簧臂由若干对同心圆弧相切而成，所述若干对同心圆弧由内向外半径逐渐增大，所述弹簧臂的末端由半径最大的一对同心圆弧和与所述外固定孔同心的圆弧相切而成。
  3. 根据权利要求2所述的板弹簧，其特征在于，所述若干对同心圆弧的半径为1mm～500mm。
  4. 根据权利要求2所述的板弹簧，其特征在于，所述弹簧臂的宽度为5mm～50mm。
  5. 根据权利要求1所述的板弹簧，其特征在于，每条所述弹簧臂由两条同心涡旋线组成，所述两条同心涡旋线为第一涡旋线和第二涡旋线；所述弹簧臂的起始端由所述两条同心涡旋线的始端和与所述内固定孔同心的圆弧相连接而成；所述弹簧臂的末端由2至3段圆弧与所述两条同心涡旋线相切而成，且最末端的圆弧与所述外固定孔同心。
  6. 根据权利要求5所述的板弹簧，其特征在于，所述两条同心涡旋线的始端和与所述内固定孔同心的圆弧通过第一圆弧和第二圆弧相连接，所述第一圆弧的两端分别与所述第一涡旋线和与所述内固定孔同心的圆弧相切，所述第二圆弧的两端分别与所述第二涡旋线和与所述内固定孔同心的圆弧相切。
  7. 根据权利要求5所述的板弹簧，其特征在于，所述两条同心涡旋线分别满足方程：
    X(t)＝a*[cos(t)+t*sin(t)]，
    Y(t)＝a*[sin(t)-t*cos(t)]；
    及方程
    X(t)＝(a+b)*[cos(t)+(t+α)*sin(t)]，
    Y(t)＝(a+b)*[sin(t)-(t+α)*cos(t)]；
    其中，X和Y为点坐标，a和a+b为半径系数，t为变量，α为起始角，且0.5≤a≤30，0＜b≤10，0rad＜t≤30rad，0rad＜α≤150rad。
  8. 根据权利要求1-7任一项所述的板弹簧，其特征在于，所述板弹簧的厚度为0.1mm～5mm，且所述板弹簧的最大外径与其厚度的比值为5～5000。
  9. 根据权利要求1所述的板弹簧，其特征在于，每条所述弹簧臂的臂宽相等。
  10. 根据权利要求1所述的板弹簧，其特征在于，每条所述弹簧臂的臂宽由内向外逐渐增大，最大宽度与最小宽度之比大于1，且小于或等于10。
  11. 一种板弹簧组，其特征在于，包括至少两个权利要求1-10任一项所述的板弹簧，所述板弹簧之间设置有垫片。
  12. 一种压缩机，其特征在于，包括权利要求11所述的板弹簧组。
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CN201198826Y (zh) * 2007-12-28 2009-02-25 中国航天科技集团公司第五研究院第五一〇研究所 一种板弹簧盒组件

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US20160290427A1 (en) 2016-10-06
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