CN202228574U

CN202228574U - Diaphragm spring

Info

Publication number: CN202228574U
Application number: CN 201120299466
Authority: CN
Inventors: 杨坤; 朱魁章; 陆永达
Original assignee: CETC 16 Research Institute
Current assignee: CETC 16 Research Institute
Priority date: 2011-08-17
Filing date: 2011-08-17
Publication date: 2012-05-23
Anticipated expiration: 2021-08-17

Abstract

The utility model relates to a diaphragm spring, which comprises an annular diaphragm body. A plurality of vortex grooves are arranged on the annular diaphragm body. The molded line of two groove lines of each vortex groove is an oxford type involute, two end heads of each vortex groove are circular arc, the inner end circular arc of each vortex groove is arranged on the outside of an inner ring of the annular diaphragm, and the outer end circular arc of each vortex groove is arranged on the inner side of an outer ring of the annular diaphragm. The beginning section of the inner-outer molded line of any vortex groove is a circular arc line, one end of the circular arc line is connected with the corresponding oxford type involute at the tangential point of the circular arc line and the oxford type involute, and the other end of the circular arc line is connected with the inner end circular arc of the vortex groove. The diaphragm changes designed axial rigidity and radial direction and greatly reduces working amount of molded line design on the premise that complex design parameter of the oxford type involute is not changed.

Description

A kind of diaphragm spring

Affiliated technical field

The utility model relates to a kind of diaphragm spring, is mainly used in the Linearkompressor support piston to-and-fro motion.

Background technique

At present in the research of space with small-sized refrigerator; Adopt the direct drive compression piston of linear electric machine to move reciprocatingly; Diaphragm spring is used for supporting compression piston, and the diaphragm spring in this structure has two kinds of functions: one to provide certain axial rigidity be that this vibration system of compression piston provides rational mechanical stiffness, makes the natural frequency of this vibration system of piston more approach the frequency of okperation of compressor; Make piston vibration convergence resonance, improve the efficient of compressor; The 2nd, diaphragm spring need offer the certain radial rigidity of piston, guarantees the gap between compression piston and the compression cylinder, reduces wearing for piston, improves the reliability and the life-span of compressor.

The cantilever molded lines that constitutes volution trough in the existing diaphragm spring belongs to Oxford type involute; Equation according to Oxford type involute; The rigidity that angle, vortex groove width, involute length and involute involuted angle etc. can change the diaphragm spring that is designed takes place through the Base radius in the design parameter that changes involute, involute joint square, involute; But through change top design parameter reach the target that will design, need very big workload.

Summary of the invention

Design parameter to the rigidity that changes diaphragm spring in the above-mentioned existing technology needs is complicated, the problem that amount of calculation is big.The purpose of the utility model is to propose a kind of diaphragm spring, and it can change diaphragm spring rigidity when not changing the many design parameters of Oxford type involute, reduce the workload in the design.

The utility model is the technological scheme that its purpose of realization is taked: a kind of diaphragm spring, comprise ringwise diaphragm body, and establish some volution troughs on the said diaphragm body; The interior molded lines of said volution trough is an Oxford type involute with outer molded lines; The volution trough two ends is a circular arc, and the inner circular arc of volution trough is positioned at the ring film ring outside, and it is inboard that volution trough outer end circular arc is positioned at the ring film outer shroud; Wherein any one of said volution trough; The The initial segment of its inside and outside molded lines is a circular arc line, and an end of said circular arc line and corresponding Oxford type involute are connected in the point of contact of the two, and the inner circular arc of the other end and volution trough joins.

Said circular arc line right central angle be the 20-50 degree.

Said circular arc line is confirmed through following method:

A), be the center of circle with the interior ring center of circle of diaphragm body, be that radius is justified with this center of circle to the distance in the center of circle of the inner circular arc of volution trough, its circumference is as interior position of positioning hole selection wire;

B), in said, select a bit on the position of positioning hole selection wire; Putting with this is the corresponding linking of Oxford type involute that two circular arc lines and volution trough two trough rims are drawn in the center of circle; The Oxford type involute of one end of circular arc line and volution trough is tangent, and the inner arc end of the other end of circular arc line and volution trough joins.

Said circular arc line right central angle be the 20-50 degree.

Can be known that by technique scheme the utility model method is simple, workload is little, can change the rigidity of diaphragm spring according to designing requirement.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

Fig. 1 is the diaphragm spring schematic representation of Oxford type involute for the molded lines of existing technology mesoscale eddies groove;

The instance one diaphragm spring schematic representation of Fig. 2 the utility model;

The instance two diaphragm spring schematic representation of Fig. 3 the utility model.

Among Fig. 1,1, interior positioning hole, 2, volution trough, 3, the inner circular arc of volution trough, 4, interior position of positioning hole selection wire, 5, interior ring, 6, outer shroud, 9, the volution trough outer trough edge, 10, the diaphragm body, 11, volution trough outer end circular arc, 12, trough rim in the volution trough.

Among Fig. 2, the location hole circle heart in 8, first, 13, the point of contact, 14, substitute circular arc.

Among Fig. 3,7, the second interior positioning hole.

Embodiment

Diaphragm spring described in the utility model comprises diaphragm body 10, and diaphragm body 10 is established the volution trough 2 of three same structures ringwise on it, and volution trough is eccentric.The inside and outside molded lines of two trough rims of volution trough, promptly volution trough outer trough edge 9 is an Oxford type involute with the interior trough rim 12 of volution trough, the volution trough two ends is a circular arc, i.e. inner circular arc 3 of volution trough and volution trough outer end circular arc 11.The inner circular arc 3 of volution trough is positioned at ring film ring 5 outsides, and volution trough outer end circle 11 arcs are positioned at ring film outer shroud 6 inboards, and are as shown in Figure 1, the axial rigidity 5.86N/mm of its involute, radial rigidity 536.19 N/mm.

Instance one:

Volution trough in this example, the The initial segment of its inside and outside molded lines are circular arc line, promptly substitute circular arc 14, and an end of circular arc line and corresponding Oxford type involute are connected in the point of contact of the two, and the inner circular arc of the other end and volution trough joins.

Substituting circular arc 14 confirms through following manner:

With the ring centers of circle in the diaphragm body 10 is the center of circle, is that radius is justified with the distance in center of circle of circular arc 3 to volution trough the inner, this center of circle, and its circumference is as interior position of positioning hole selection wire 4.

A bit draw circular arc for the center of circle on the position of positioning hole selection wire 4 in the choosing, an end of circular arc and Oxford type involute are tangent, and the inner circular arc of the other end and volution trough joins.The center of circle of diverse location obtains different axial rigidity of diaphragm spring and radial rigidity.Promptly with the center of circle of the first interior positioning hole 8 as alternative circular arc 14; Putting with this is that circular arc line is drawn in the center of circle, and an end and Oxford type involute are tangent, and points of tangency is rotated counterclockwise 30 degree and is the circular arc terminating point; Be connected with the inner circular arc of volution trough; This moment, the axial rigidity of diaphragm spring was 4.87N/mm, and the axial rigidity 5.86N/mm than pure involute among Fig. 1 has reduced 0.99N/mm; Radial rigidity 287.77 N/mm are compared to radial rigidity 536.19 N/mm of the diaphragm spring of pure involute among Fig. 1, have reduced 248.42 N/mm.

Instance two:

With the center of circle of the second interior positioning hole 7 as alternative circular arc 14; Putting with this is that circular arc is drawn in the center of circle, and an end and Oxford type involute are tangent, and points of tangency is rotated counterclockwise 30 degree and is the terminating point of circular arc; Be connected with the inner circular arc of volution trough; This moment, the rigidity of diaphragm spring was 5.62N/mm, and the axial rigidity 5.86N/mm than pure involute among Fig. 1 has reduced 0.24N/mm; Radial rigidity 377.79 N/mm, radial rigidity 536.19 N/mm than the diaphragm spring of pure involute among Fig. 1 have reduced 158.4N/mm.

The above only is the preferred embodiment of the utility model, is not that the utility model is done any type of restriction.Every technology and method essence according to the utility model is to any simple modification, equivalent variations and modification that above embodiment did, all still belongs in the scope of technology and method scheme of the utility model.

Claims

1. a diaphragm spring comprises ringwise diaphragm body, establishes some volution troughs on the said diaphragm body; The interior molded lines of said volution trough is an Oxford type involute with outer molded lines; The volution trough two ends is a circular arc, and the inner circular arc of volution trough is positioned at the ring film ring outside, and it is inboard that volution trough outer end circular arc is positioned at the ring film outer shroud; It is characterized in that: wherein any of said volution trough; The The initial segment of its inside and outside molded lines is a circular arc line, and an end of said circular arc line and corresponding Oxford type involute are connected in the point of contact of the two, and the inner circular arc of the other end and volution trough joins.

2. diaphragm spring according to claim 1 is characterized in that: said circular arc line right central angle be the 20-50 degree.