CN101509487A - Noncircular stator inner loop curve single-action vane pump - Google Patents

Abstract

A non-circular stator internal ring curve single-acting vane pump belongs to the field of mechanical design in mechanical engineering, which is a hydraulic pump that the vane is geometrically sealed with the stator and that the vane is tightly jointed with the internal surface of the stator without external force. The stator internal ring curve in the invention is a non-circular closed curve: any straight line is made through the acnode of the non-circular closed curve, the length of the line segment formed by two intersection points of the straight line and the non-circular closed curve is always a definite value, and the polar equation of the non-circular closed curve is as follows: rho equals R plus F (theta); in the formula, rho is polar radius, theta is polar angle, R is constant; and in rectangular coordinate system, F (theta) is continuous periodic function and is symmetrical about the point (phi, 0), the cycle time T is equal to 2 phi, and theta belongs to (0, 2 phi). Compared with the existing vane pump, in the working process of the non-circular stator internal ring curve single-acting vane pump in the invention, the vane radial force is balanced without supplying high pressure oil through the root of the vane groove, that is, oil supply path is not needed; and the pump is simple in structure, and the manufacturing technology is convenient. The non-circular closed curve further can be used for vane hydraulic motors.

Description

Noncircular stator inner loop curve single-action vane pump

Technical field

Noncircular stator inner loop curve single-action vane pump of the present invention belongs to the mechanical designing technique field in the mechanical engineering, particularly is the oil hydraulic pump of how much sealings of a kind of blade and stator.

Background technique

In the vane pump field, vane pump comes the balance blade radial force by supplying with high pressure oil for the blade groove root, must establish oil feeding line newly on rotor for this reason at present, thereby causes manufacture cost and leakage rate to increase.And the centrifugal force that blade and stator inner surface fit tightly when being rotated by blade guarantees, has limited vane pump operating speed lower limit.

Summary of the invention

The purpose of noncircular stator inner loop curve single-action vane pump of the present invention is: fit tightly centrifugal force assurance when being rotated by blade at existing blade hydraulic pump blade and stator inner surface, limited the defective of vane pump operating speed lower limit, thereby openly used the technological scheme of a kind of non-round closed curve as the vane pump of blade pump stator inner loop curve.

Noncircular stator inner loop curve single-action vane pump of the present invention, it is characterized in that with a kind of non-round closed curve as the blade pump stator inner loop curve, make any straight line by non-round closed curve limit, the length of two formed line segments of intersection point of this straight line and non-round closed curve is always definite value, this line segment length is as the length of blade, how much sealings of blade and stator inner surface, the noncircular stator inner loop curve single-action vane pump that does not need external force that blade and stator inner surface are fitted tightly, mainly by left gland 1, stator 2, right gland 3, packing ring 4, joint bolt 5, seal ring 6, lock screw 7, right end cap 8, screw 9, locating stud 10, axle 11, lobus dexter sheet 12, bearing 13, left end cap 14, dust ring 15, rotor shaft 16, back-up ring 17, middle blade 18, lobus sinister sheet 19 is formed, the axis of rotor shaft 16 becomes a bit at the cross section inner projection of vane pump, and overlap with non-round closed curve limit, rotor shaft 16 is provided with and radially connects blade groove, the length of blade groove and width equal width of blade and thickness, lobus dexter sheet 12, middle blade 18, lobus sinister sheet 19 radially passes the blade groove of rotor shaft 16 and can radially be free to slide lobus dexter sheet 12, middle blade 18, the two ends of lobus sinister sheet 19 all fit tightly with stator 2 internal surfaces.

Above-mentioned noncircular stator inner loop curve single-action vane pump is characterized in that the polar equation of described non-round closed curve is: in ρ=R+F (θ) formula: ρ is utmost point footpath; θ is a polar angle; R is a constant; In rectangular coordinate system, F (θ) is the consecutive periods function, and about point (π, 0) symmetry, period T=2 π, θ ∈ [0,2 π].

Above-mentioned non-round closed curve ρ=R+F (θ) also can be used as the stator inner loop curve of vane motor.

Working procedure is: 16 rotations of motor driving rotor shaft, drive lobus dexter sheet 12, middle blade 18,19 rotations of lobus sinister sheet, lobus dexter sheet 12, middle blade 18, lobus sinister sheet 19 are in rotor shaft 16 rotary courses, and relative rotor shaft 16 radially slides owing to be subjected to the constraint of stator 2 internal surfaces.In this movement process, the sealed volume periodically-varied that lobus dexter sheet 12, middle blade 18, lobus sinister sheet 19 and left gland 14, right gland 3, rotor shaft 16 and stator 2 internal surfaces form, thus reach oil suction and press oily purpose.

Noncircular stator inner loop curve single-action vane pump of the present invention, advantage are to use the geometry theory dexterously, make this vane pump have stable low-speed performance, and processability of product structure is good, and processing cost is low.Compare with existing vane pump, outstanding advantage and substantial progress are arranged.Non-round closed curve among the present invention also can be used for vane motor.

Four. description of drawings

Fig. 1 is non-round closed curve

Fig. 2 is noncircular stator inner loop curve single-action vane pump B-B sectional view

Sequence number is among the figure:

1-left gland 2-stator 3-right gland 4-packing ring 5-joint bolt 6-seal ring

7-lock screw, 8-right end cap, 9-screw, 10-locating stud 11-axle 12-lobus dexter sheet

13-bearing, 14-left end cap, 15-dust ring, 16-rotor shaft, 17-back-up ring, 18-middle blade

19-lobus sinister sheet

Fig. 3 is noncircular stator inner loop curve single-action vane pump A-A sectional view

Sequence number is among the figure:

20-flow window, 21-flow window

Embodiment

Mode of execution 1

A kind of noncircular stator inner loop curve single-action vane pump, mainly by left gland 1, stator 2, right gland 3, packing ring 4, joint bolt 5, seal ring 6, lock screw 7, right end cap 8, screw 9, locating stud 10, axle 11, lobus dexter sheet 12, bearing 13, left end cap 14, dust ring 15, rotor shaft 16, back-up ring 17, middle blade 18, lobus sinister sheet 19 is formed, the axis of rotor shaft 16 becomes a bit at the cross section inner projection of vane pump, and overlap with non-round closed curve limit, rotor shaft 16 is provided with and radially connects blade groove, the length of blade groove and width equal width of blade and thickness, lobus dexter sheet 12, middle blade 18, lobus sinister sheet 19 radially passes the blade groove of rotor shaft 16 and can radially be free to slide lobus dexter sheet 12, middle blade 18, the two ends of lobus sinister sheet 19 all fit tightly with stator 2 internal surfaces;

The stator inner loop curve polar equation is decided to be ρ=R+Ssin θ, wherein R=100mm; S=26mm;

Part selection and processing: lobus dexter sheet 12, middle blade 18, lobus sinister sheet 19 the selection of materials are 38CrMnAl, and surface hardening is handled, and handle rear surface hardness HRC45-50, rotor shaft 16, the selection of material 40CrMn, surface hardening is handled, and handles rear surface hardness HRC50-55; Stator 2 the selection of material HT-200, the internal surface nitriding is handled.

Mode of execution 2

The stator inner loop curve polar equation is decided to be ρ=R+F (θ),

R=100mm wherein, $F\left(\mathrm{\θ}\right)=\left\{\begin{array}{cc}16\·\mathrm{\θ}& \mathrm{\θ}\∈[0,\frac{\mathrm{\π}}{2}]\\ -16\·\mathrm{\θ}+16\mathrm{\π}& \mathrm{\θ}\∈[\frac{\mathrm{\π}}{2},\frac{3\mathrm{\π}}{2}]\\ 16\·\mathrm{\θ}-32\mathrm{\π}& \mathrm{\θ}\∈[\frac{3\mathrm{\π}}{2},2\mathrm{\π}]\end{array}\right.,$ F (θ) unit is mm.

Other is with mode of execution 1.

Mode of execution 3

The stator inner loop curve polar equation is decided to be ρ=R+F (θ),

R=100mm wherein, $F\left(\mathrm{\θ}\right)=\left\{\begin{array}{cc}-10{\mathrm{\θ}}^2+10\mathrm{\π\θ}& \mathrm{\θ}\∈[0,\mathrm{\π}]\\ 10{\mathrm{\θ}}^2+20{\mathrm{\π}}^2-30\mathrm{\π\θ}& \mathrm{\θ}\∈[\mathrm{\π},2\mathrm{\π}]\end{array}\right.,$ F (θ) unit is mm.

Other is with mode of execution 1.

Claims (2)

1, a kind of noncircular stator inner loop curve single-action vane pump, it is characterized in that with a kind of non-round closed curve as the blade pump stator inner loop curve, make any straight line by non-round closed curve limit, the length of two formed line segments of intersection point of this straight line and non-round closed curve is always definite value, this line segment length is as the length of blade, how much sealings of blade and stator inner surface, the noncircular stator inner loop curve single-action vane pump that does not need external force that blade and stator inner surface are fitted tightly, mainly by left gland (1), stator (2), right gland (3), packing ring (4), joint bolt (5), seal ring (6), lock screw (7), right end cap (8), screw (9), locating stud (10), axle (11), lobus dexter sheet (12), bearing (13), left end cap (14), dust ring (15), rotor shaft (16), back-up ring (17), middle blade (18), lobus sinister sheet (19) is formed, the axis of rotor shaft (16) becomes a bit at the cross section inner projection of vane pump, and overlap with non-round closed curve limit, rotor shaft (16) is provided with and radially connects blade groove, the length of blade groove and width equal width of blade and thickness, lobus dexter sheet (12), middle blade (18), lobus sinister sheet (19) radially passes the blade groove of rotor shaft (16) and can radially be free to slide, lobus dexter sheet (12), middle blade (18), the two ends of lobus sinister sheet (19) all fit tightly with stator (2) internal surface, and the polar equation of its non-round closed curve is: in ρ=R+F (θ) formula: ρ is utmost point footpath; θ is a polar angle; R is a constant; In rectangular coordinate system, F (θ) is the consecutive periods function, and about point (π, 0) symmetry, period T=2 π, θ ∈ [0,2 π].

2,, it is characterized in that described non-round closed curve ρ=R+F (θ) also can be used as the stator inner loop curve of vane motor according to the described a kind of noncircular stator inner loop curve single-action vane pump of claim 1.

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