CN1052536A

CN1052536A - Dual-vane three-action fluid machinery

Info

Publication number: CN1052536A
Application number: CN 90109740
Authority: CN
Inventors: 余侃
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-12-13
Filing date: 1990-12-13
Publication date: 1991-06-26
Also published as: CN1018468B

Abstract

The invention belongs to fluid volume-changing machinery technology.For overcoming existing vane pump complex structure, seal the low problem of not good enough volumetric efficiency, the new cosine curve of this programme proposition housing adds the inner profile surface of circular arc, adopted additional seal approach on the double-leaf, use end face static pressure automatic compensation gap plate in the housing, made this scheme have high working efficiency, simple in structure, the pulsation of oil stream is little, and pump or motor operating mode be the advantage of conversion easily.

Description

Dual-vane three-action fluid machinery

The utility model belongs to the vane pump class of the liquid capacity-changing mechanical among the FO4C, relates to a kind of structure of novel body.

The fluid machinery of blade type is one of power unit of energy pattern common in mechanical engineering field conversion, it can with the pressure of liquid can and mechanical motion change mutually.Common that single blade arranged or mutliblade, have single or multifunctional.All-in-one-piece blade is a fixed length in existing technology since wearing and tearing or make in error, can not guarantee reliably contact and seal between blade and the housing, cause volumetric efficiency low, the leaf longevity weak point directly influences the performance of integral body; The oil inlet and outlet of existing three action type list blade fluid machineries is placed on the central shaft more, and it is difficult for realizing the structure of two or more blades; It is unreliable mostly to be line contact sealing between general in addition rotor and the stator, causes equally holding decrease in efficiency and influences performance.Retrieval finds to have close patented technology formerly through Patent Office of the People's Republic of China: (1) US3642390 is the pump that a kind of not transcapsidation of axle body of single blade changes, its oil is the two ends turnover from axle, be characterized in simple in structure, but be the line contact between axle and the housing, the curve of its housing is sinusoidally (as Fig. 1); (2) US4507068 is a mutliblade pump, each blade can slide in the groove of oneself, the interior profile of its housing is a short and long epitrochoid, three sections circular arcs that can contact with rotating shaft are arranged between its curve, problem is that blade will initiatively stretch with inner walls and contacts in entering the sap cavity process that each curve forms, and certain pressure will be arranged, otherwise the difficult sealing between blade and the housing causes low, volumetric efficiency decline (structure such as Fig. 2) of life-span to guarantee.(3) US4432711 is that single blade shell curve is that cycloid adds circular arc, and one is picked out by end face at warp-wise one of oil inlet and outlet on the axle core, and its complex structure is difficult for realizing double-leaf or mutliblade structure (as Fig. 3).In a word, their characteristics are that (1) and (3) is single blade, and its efficient is low, and pulsation is big, complex structure; (2) though be multiple-blade, complex structure is handled bad then volumetric efficiency and is descended and influence the complete machine performance.

The objective of the invention is to overcome the shortcoming of aforesaid blade fluid machinery, a kind of double-leaf is provided and has wide curve in the housing of special molded lines, its designs simplification also can obtain to work stably, and the raising volumetric efficiency is also improved the complete machine performance.

By as above design, also the same rotating shaft, housing and the blade of including of dual-vane three-action fluid machinery provided by the invention with common pattern, its concrete feature is: the inner outline of its housing (1) is made up of 6 sections circular arcs and 6 sections cosine curves, it all is isometric making by the internal diameter on molded lines center arbitrarily angled, and the curve of its housing is divided into into 12 sections:

0≤θ≤π/18 ρ＝R

π/18＜θ＜π/3 ρ＝R+A[1cos3.6（θ- (π)/18 ）]

π/3≤θ≤7π/18 ρ＝R+2A

7π/18＜θ＜2π/3 ρ＝R+A[1-cos3.6（θ- (π)/9 ）]

2π/3≤θ≤13π/18 ρ＝R

13π/18＜θ＜π ρ＝R+A[1-cos3.6（θ- (13π)/18 ）]

π≤θ≤19π/18 ρ＝R+2A

19π/18＜θ＜4π/3 ρ＝R+A[1-cos3.6（θ- (7π)/9 ）]

4π/3≤θ≤25π/18 ρ＝R

25π/18＜θ＜5π/3 ρ＝R+A[1-cos3.6（θ- (25π)/18 ）]

5π/3≤θ≤31π/18 ρ＝R+2A

31π/18＜θ＜2π ρ＝R+A[1-cos3.6（θ- 13/9 π）〕

Wherein R is a rotor radius, and A is the cosine curve amplitude, and then ρ is the point on the curve and the distance at center.Its rotating shaft (2) is one and has two by the intersect vertically cylindrical body of groove of axle center, the one end has the axle journal of output or input power, connect with bearing between this axle journal and the housing, the other end of rotating shaft matches with the interior three-arc of cylindrical radius R and housing.Its blade (3) is the planar wafer of two flute profiles, and each blade all has the elastic material structure of compensate for clearance, and the thickness of blade matches with the groove of rotating shaft, and the length of blade is slightly larger than 2(R+A), the width of blade is slightly larger than the width of the column part of rotating shaft.Be provided with the axial clearance compensation plate (4) of static pressure between rear end cover in housing (5) and the blade, inlet and outlet of fuel channel compiles in rear end cover (5) and picks out.

Blade in this programme can be to be provided with stage clip or flexible oil resistant rubber (6) formation (as Fig. 4 A) in the middle of the sheet metal of two ends; Also can adopt spring (7) on integrated type sheet metal and the termination with the structure (as Fig. 4 B, Fig. 4 C) of diaphragm seal (8), can guarantee that like this effect that seals is not subjected to the influence of foozle or parts depreciation in service.

This programme middle shell inwall curve is to form like this.Shown in Fig. 5 A, on the coordinate θ of level axle, 2 π are divided into trisection, every part is 2 π/3, with first part is example, at first it is divided equally into two-part, ρ=0 in π/18 radians of beginning in the first portion, ρ=2A, i.e. OC section and DE section in the π that second portion begins/18 radians (i.e. (π)/3～(the 7 π)/18) radian.And then with cosine curve CD and EF are coupled together, the rest may be inferred has just formed a curve that has experienced 3 cycles in 2 π radians.Now the OB section of θ axle is bent to a circle, as shown in Figure 5, the curve of above-mentioned formation is the bending along with the bending of θ axle also, has promptly formed the housing inner profile curve of this programme design.BC, FG, three sections circular arcs of JK are and the contacted zone of the cylinder of rotating shaft in erection drawing Fig. 6 of this programme, the surface of contact broad separates the cavity that three convex outer curve partly form, it has supporting effect, can save the bearing at rotating shaft rear portion, and the better seal effect is arranged.The two ends of each cavity all are provided with radially inlet and outlet of fuel channel, and they lead to compile in the rear end cover and pick out.When the certain orientation rotation is pressed in rotating shaft, blade is divided into front and back two-part after entering cavity, because the effect of elastic material in the blade, the blade two ends are contacted with the inwall of housing with suitable pressure, guarantee to isolate and sealing, be separated into a, b two-part behind the cavity above blade 1 enters as shown, a chamber is strengthened, the b chamber dwindles along with rotating shaft is rotated counterclockwise, and has therefore finished the work of suction.It more than is the working state of pump; After feeding pressure oil, just become motor.No matter be pump or motor, their adjustable-speed, direction is reversible.This programme be designed to three the effect patterns, the two ends alternation of blade, so the turn around work of suction of rotating shaft can finish 12 times, the amplitude of pulsation is 30 ° of angles of rotor, its oil stream pulsation obviously reduces than the pump of single blade or single-acting formula, so its stable work in work.

The superiority that adopts this programme to embody: (1) high working efficiency, the blade rate of working simultaneously is 75%; Blade adopts the measure that guarantees sealing, volumetric efficiency height, so reliability height, and specific power is big; (2) simple in structure, manufacturing and cost are low easily; (3) oil inlet and outlet is opened the two ends at each cavity, does not have the phenomenon of pocketed oil; (4) the steady pulsation of multiple-blade working oil levelling is little; (5) pump or motor operating mode are exchanged easily.

Description of drawings:

Fig. 1 is the sketch of the single blade type axial-flow pump of US3642390.

Fig. 2 is the sketch of US4507068 Pump with multiple vane.

Fig. 3 is the sketch of the single blade Gerotor pump of US4432711.

Fig. 4 A, Fig. 4 B, Fig. 4 C are the structural representation of this programme blade.

Fig. 5 A, Fig. 5 B are the formation figure of housing curve, and the curve synoptic diagram of housing.

Fig. 6 A, Fig. 6 B are this programme dual-vane three-action fluid machinery structural drawing.

Among the figure: (1)-housing; (2)-rotating shaft; (3)-blade; (4)-static pressure axial clearance compensation plate; (5)-rear end cover; (6)-oil resistant rubber; (7)-spring; (8)-diaphragm seal.

Fig. 6 A, Fig. 6 B are the specific embodiment of this programme; Its boundary dimension is 170 * 160 * 160mm, the wide 50mm of blade, thick 6mm, and the center adds oil resistant rubber, and rotating speed is 3000 rev/mins during as pump, and its flow is 6975ml/s.Gross weight is about 10Kg.

Claims

1, a kind of three action type fluid machineries of double-leaf, it is made up of rotating shaft, housing and blade, the internal diameter by the axle center on arbitrarily angled of its housing of its feature (1) all is that isometric inner profile curve is made up of 6 sections circular arcs and 6 sections cosine curves, and the curve of its housing is divided into 12 sections on circumference:

0≤θ≤π/18 p=R

π/18＜θ＜π/3 p=R+A[1-cos3.6(θ- (π)/18 π]

π/3≤θ≤7π/18 p=R+2A

7π/18＜θ＜2π/3 p=R+A[1-cos3.6(θ- (π)/9 )]

2π/3≤θ≤13π/18 p=R

13π/18＜θ＜π p=R+A[1-cos3.6(θ- (13π)/18 )]

π≤θ≤19π/18 p=R+2A

19π/18＜θ＜4π/3 p=R+A[1-cos3.6(θ- (7π)/18 )]

4π/3≤θ≤25π/18 p=R

25π/18＜θ＜5π/3 p=R+A[1-cos3.6(θ- (25π)/18 )]

5π/3≤θ≤31π/18 p=R+2A

31π/18＜θ＜2π p=R+A[1-cos3.6(θ- (13π)/9 )]；

Its rotating shaft (2) is one and has by the intersect vertically cylindrical body of groove of axle center that one end has the axle head that stretches out to connect with bearing with housing, and the other end is that the interior three-arc of radius R and housing matches; Its blade (3) is the planar wafer that has the compensate for clearance measure of two flute profiles; Be provided with static pressure axial clearance compensation plate (4) in the inside of housing, inlet and outlet of fuel channel compiles in rear end cover (6) and picks out.

2, according to the described fluid machinery of claim 1, the blade that it is characterized in that it is made up of the sheet metal at two ends and middle stage clip or flexible oil resistant rubber.

3, according to the described fluid machinery of claim 1, the blade that it is characterized in that it is made of with diaphragm seal the spring on all-in-one-piece sheet metal and the termination.