CN1435571A - Speed pressure compensation balanced impeller pump - Google Patents

Abstract

A speed-pressure compensations balanced vane pump for boosting the steering of car is composed of stator, rotor, vanes, oil sucking window and oil exhausting window. A part which can float up or down with the change of rotation speed is installed between two adjacent vane in rotor, so changing the displacement of pump. The linear sleeve is installed in stator.

Description

Speed, pressure compensation balanced impeller pump

Technical field

Velocity pressure compensation balance formula vane pump of the present invention belongs under the operating modes such as being used for the motor turning power-assisted in the power transport field and a kind of new blade pump of invention.

Background technique

At present in transport field, because the existing dissimilar employed power assistance pump for steering of automobile is the general vane pump that generally uses, the automobile power assistance pump for steering, output flow increases along with the increase of engine speed, make the output flow of boost pump be higher than the flow of actual demand, increase the power loss of pump, reduced the whole efficiency of automobile.So it is very necessary designing a kind of novel new blade pump with velocity pressure compensation balance function at the existing in prior technology Study on Problems.

Summary of the invention

The objective of the invention is in view of the existing in prior technology problem on the basis of balanced impeller pump, the part of rotor between two vane pumps further made the floating member that takes place along with the vane pump change in rotational speed, make the blade pump delivery when the vane pump rotation speed change, change less or do not change.The present invention is a velocity pressure compensation balance formula vane pump, is made up of stator, rotor, blade, oil sucking window, oil extraction window; The centre that is installed in every adjacent two blades in the rotor is equipped with and can be realized upper and lower unsteady parts with the vane pump change in rotational speed; These parts are installed in the outer surface of rotor, make the blade pump delivery change less when the vane pump rotation speed change or do not change; Stator liner is housed in stator.Speed of the present invention, pressure compensation balanced impeller pump, the stator liner that is equipped with in its stator is pressure memory alloy stator neck bush or is floating stator neck bush, the change in shape of stator neck bush takes place under new pressure, change the relative length of big circle radius and little circle radius, thereby make the blade pump delivery when the vane pump rotation speed change, change less or do not change.Speed of the present invention, pressure compensation balanced impeller pump, can utilize the rotor width t that floats, the degree that adjustment rotor floating part emersion height h regulates the rotation speed change compensation set, can utilize following formula to determine: supposition, B is the track ring width; Z is the number of blade; t ₁Be vane thickness; θ ₁Be the inclination angle of blade with respect to large circular arc radius; θ is the inclination angle of blade with respect to rotor radius, approximate thinks θ ₁=θ; R ₂Be the big circle radius of stator; R ₁Be the stator minor radius; R is a rotor radius, and pump delivery is: $q=2B[({\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="A0210293900051.png"\; state="\{\{state\}\}">R</figure-callout>}}_2^2-{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="A0210293900051.png"\; state="\{\{state\}\}">R</figure-callout>}}_1^2)\mathrm{\&pi;}-\frac{(R_2-R_1){\mathrm{<figure-callout\; id="1"\; label="zt"\; filenames="A0210293900051.png"\; state="\{\{state\}\}">zt</figure-callout>}}_1}{\cos \mathrm{\&theta;}}]$ If the width of the rotor that floats is t, the height that increases the rotor portion emersion that floats along with rotating speed is h, and the spinner velocity compensation volume that then floats is:

q ₁=zthB therefore, cancellation ratio is: $\frac{\mathrm{<figure-callout\; id="1"\; label="q\; q"\; filenames="A0210293900051.png"\; state="\{\{state\}\}">q</figure-callout>}}{q_{}}=\frac{2[({\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="A0210293900051.png"\; state="\{\{state\}\}">R</figure-callout>}}_2^2-{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="A0210293900051.png"\; state="\{\{state\}\}">R</figure-callout>}}_1^2)\mathrm{\&pi;}-\frac{(R_2-R_1){\mathrm{<figure-callout\; id="1"\; label="zt"\; filenames="A0210293900051.png"\; state="\{\{state\}\}">zt</figure-callout>}}_1}{\cos \mathrm{\&theta;}}]}{\mathrm{zth}}$ Therefore, can be by adjusting t, h regulates the degree of rotation speed change compensation, thereby reaches purpose of energy saving.Equally, because R ₂, R ₁The variation of relative length, regulate the degree of rotating speed, variation in pressure compensation, thereby reach purpose of energy saving.The present invention is mainly used in operating modes such as boosting pump for car steering.Increase along with the rotating speed of motor, the power-assisted pump delivery also will be along with increase, in order to reduce along with rotating speed increases and the discharge capacity of increase, the rotor portion that floats will cause centrifugal force to increase along with the increase of rotating speed and protruding, reduce interlobate sucking and venting space, with this revolution discharge capacity that reduces pump, reach the purpose that compensating rotational speed increases.

Description of drawings

Accompanying drawing of the present invention is:

The structural representation of speed, pressure compensation balanced impeller pump.

Among the figure: 1, stator 2, roundlet arc 3, oil extraction window 4, orthodrome 5, oil sucking window 6, linked hole 7, slide pad 8, connection spring 9, stator liner 10, the block 11 that floats, spring groove 12, frame 13, rotor 14, blade 15, unsteady block chute 16, floating type stator support piece

Embodiment

Concrete structure of the present invention as shown in drawings, stator 1 and stator liner 9 are housed on the inner ring of frame 12, uniform in the middle of stator liner 9 and stator 1 the floating type stator support piece 16 that four elastic rubber materials are made is housed, rotor 13 is housed in stator 1.Uniform on rotor 13 8 groups of blades 14 are housed, uniform in the middle of per two groups of blades 8 groups of slide pad 7 are housed.Slide pad 7 is by unsteady block 10 and connect spring 8 phase compositions; The block 10 that floats is installed in the block chute 15 that floats, connecting spring 8 is installed in the spring groove 11, on unsteady block 10, have linked hole 6, so that hydraulic oil enters the bottom of the block 10 that floats by linked hole 6, by connecting the acting in conjunction of spring 8 and hydraulic oil, according to the pump housing advance, the different pressures of oil extraction makes the block 10 that floats keep upper and lower hydro-cushion, carry out the compensation of realization speed, pressure balance function, in like manner stator liner 9 also can be realized the compensation of speed, pressure balance function under the effect of floating type stator support piece 16.

Claims (3)

1, a kind of velocity pressure compensation balance formula vane pump is made up of stator (1), rotor (13), blade (14), oil sucking window (5), oil extraction window (3); The centre that it is characterized in that being installed in every adjacent two blades (14) in the rotor (13) is equipped with and can be realized upper and lower unsteady parts with the vane pump change in rotational speed; These parts are installed in the outer surface of rotor (13), make the blade pump delivery change less when the vane pump rotation speed change or do not change; Stator liner (9) is housed in stator (1).

2, speed according to claim 1, pressure compensation balanced impeller pump; It is characterized in that the stator liner (9) that is equipped with is pressure memory alloy stator neck bush or is floating stator neck bush in stator (1); The change in shape of stator neck bush (9) taking place under new pressure, change the relative length of big circle radius and little circle radius, thereby make the blade pump delivery when the vane pump rotation speed change, changes less or do not change.

3, according to claim 1,2 described speed, pressure compensation balanced impeller pump; It is characterized in that utilizing and set the rotor width t that floats, the degree that adjustment rotor floating part emersion height h regulates the rotation speed change compensation, can utilize following formula to determine: supposition, B is the track ring width; Z is the number of blade; t ₁Be vane thickness; θ ₁Be the inclination angle of blade with respect to large circular arc radius; θ is the inclination angle of blade with respect to rotor radius, approximate thinks θ ₁=θ; R ₂Be the big circle radius of stator; R ₁Be the stator minor radius; R is a rotor radius, and pump delivery is: $q=2B[(R_2^2-R_1^2)\mathrm{\&pi;}-\frac{(R_2-R_1){\mathrm{zt}}_1}{\cos \mathrm{\&theta;}}]$ If the width of the rotor that floats is t, the height that increases the rotor portion emersion that floats along with rotating speed is h, and the spinner velocity compensation volume that then floats is:

q ₁=zthB therefore, cancellation ratio is: $\frac{q}{q_1}=\frac{2[(R_2^2-R_1^2)\mathrm{\&pi;}-\frac{(R_2-R_1){\mathrm{zt}}_1}{\cos \mathrm{\&theta;}}]}{\mathrm{zth}}$ Therefore, can be by adjusting t, h regulates the degree of rotation speed change compensation, thereby reaches purpose of energy saving.Equally, because R ₂, R ₁The variation of relative length, regulate the degree of rotating speed, variation in pressure compensation, thereby reach purpose of energy saving.

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