CN100510377C

CN100510377C - Circumferential flow pump

Info

Publication number: CN100510377C
Application number: CNB200610145500XA
Authority: CN
Inventors: 小山正浩; 井上诚三
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2006-02-09
Filing date: 2006-11-17
Publication date: 2009-07-08
Anticipated expiration: 2026-11-17
Also published as: DE102006043235A1; TW200730722A; JP2007211679A; CN101016872A; US20070183886A1

Abstract

The invention provides a circumference flow pump, which restrains swelling amount of ethanol and toluene in fuel to avoid dead lock of turbine. The circumference flow pump guides fuel from fuel tank into internal combustion engine. Turbine is produced by fiber-reinforcing PPS, and comprises: base, assorting to motor rotor; blades part, located in periphery of base; and foreign ship part, located in periphery of blades part. Wherein, the blades part is composed of plenty of blades located on base in line radial state and comprises bent area. When observed from the direction of axis of motor rotor, projected area S1 of the whole blades part and projected area S3 of the base are S1:S3=9-15:1, and the projected area S1 of the whole blades part and projected area S2 of the felloe part are S2:S1=0.10-0.13:1.

Description

Circumferential flow pump

Technical field

The present invention relates to a kind of circumferential flow pump, it is accommodated in for example inside of fuel tanks of automobile, with the regulation pressure to the internal-combustion engine fueling.

Background technique

Be assemblied in the turbine in the circumferential flow pump, it possesses: base portion, and itself and motor rotor are chimeric; Blade part, it is arranged at the periphery of base portion; And foreign steamer portion, it is arranged at the periphery of blade.As existing circumferential flow pump, carrying out turning to the exploitation of the turbine of purpose with high efficiency and low noise always.As this turbine, existing method is with the blade part thin-walled property, uses the equal fiber with excellent of formability and dimensional stability to strengthen polyphenylene sulfide (PPS).In addition, the known technology (for example, with reference to patent documentation 1) that on blade part, forms curved part.

Patent documentation 1: the spy opens 2003-336558 communique (Figure 18,19)

Summary of the invention

But in existing circumferential flow pump, owing to have curved part on the blade part of turbine, the resin flows during therefore easily to molding and forming produces and hinders.Using under the situation of fiber reinforcement PPS as moulding resin, in the curved part of blade part, be easy to generate unanimity as the orientation of the fiber of reinforcing material.In addition, when molding and forming by blade part to foreign steamer portion injection moulding resin, but be subjected to blade part influence and in foreign steamer portion the orientation of fiber also be easy to generate unanimity.In order to suppress the swelling with respect to ethanol and toluene contained in the fuel, fiber reinforcement PPS should improve the randomness of fiber orientation or improve the crystallinity of PPS.For base portion, can improve the crystallinity of PPS by keep-uping pressure when the molding and forming, but for blade part and foreign steamer portion, the pressure that then can't improve the crystallinity degree of PPS keeps.Therefore, because the randomness of the fiber orientation of blade part and foreign steamer portion is low, therefore compare with base portion, the swelling amount of ethanol and toluene is many.To the situation of the degree that comes in contact with housing, can produce the locked problem of turbine in the turbine swelling.

Be to suppress the swelling amount, consider to use thermosetting resins such as phenolic resin, but need subsequent handling such as flash removed.

The present invention proposes in order to address the above problem, and a kind of circumferential flow pump that the turbine that is made of fiber reinforcement PPS has been installed is provided, and the swelling that it suppresses with respect to ethanol and toluene contained in the fuel prevents to produce the locked of turbine.

Circumferential flow pump of the present invention possesses: discoideus turbine, and itself and motor rotor are chimeric; And pump case, it takes in this turbine, and this circumferential flow pump imports fuel and send to internal-combustion engine from fuel tank, and turbine is made of fiber reinforcement PPS, and this turbine possesses: base portion, itself and motor rotor are chimeric; Blade part, it is arranged at the periphery of base portion; And foreign steamer portion, it is arranged at the periphery of blade part, blade part is by constituting from a plurality of blades of base portion with the setting of straight radial shape, has curved part simultaneously, when the direction of the motor reel of motor rotor is observed turbine, the area of contour S1 of blade part integral body is S3:S1=9～15:1 with the ratio of the area of contour S3 of base portion, and the area of contour S1 of blade part integral body is S2:S1=0.10～0.13:1 with the ratio of the area of contour S2 of foreign steamer portion.

The effect of invention

According to the present invention, can justice provide a kind of circumferential flow pump that the turbine that is made of fiber reinforcement PPS has been installed, the swelling that it suppresses with respect to ethanol and toluene contained in the fuel prevents to produce the locked of turbine.

Description of drawings

Fig. 1 is the part section front view of the circumferential flow pump in the expression mode of execution 1.

Fig. 2 is the oblique drawing of the turbine in the mode of execution 1.

Fig. 3 is that turbine in the mode of execution 1 is with respect to the performance plot of the swelling amount of ethanol and toluene.

Embodiment

The 1st mode of execution

Fig. 1 is the part section front view of the circumferential flow pump in the expression embodiments of the present invention 1.Circumferential flow pump 1 possesses: discoideus turbine 2, and itself and motor rotor 3 are chimeric; And pump case 7, it is made of the pump cover 5 of having taken in this turbine 2 and pump seat 6.On pump cover 5, be provided with at central part and stop motor rotor 3 at the thrust-bearing 5a that the thrust direction of motor reel moves, in addition, the suction port 5b that fuel is imported turbine 2 from fuel tank is set in the bottom.The bearing 6a of the rotation of the motor reel that supports motor rotor 3 is installed at the central part of pump seat 6.

Under the state that circumferential flow pump 1 is dipped in the fuel tank, if 2 rotations of drive motor rotor 3 then turbine, thus, fuel is imported in the pump chamber from suction port 5b.And then fuel is via the exhaust port 6e and the motor room of pump chamber, sends to internal-combustion engine from ejiction opening 4., between turbine 2 and pump case 7, space 7a is set here, so that it does not hinder the rotation of turbine 2.

Fig. 2 is the oblique drawing of turbine 2, and Fig. 2 (a) is an overall diagram, and Fig. 2 (b) is a part sectioned view.Turbine 2 is by constituting with the bottom: base portion 2a, and itself and motor rotor 3 are chimeric; Blade part 2b, it is arranged at the periphery of base portion 2a; And the 2c of foreign steamer portion, it is arranged at the periphery of blade 2b.Be provided with embedding part 2f at the center of base portion 2a, it is for chimeric and form D word shape with the motor reel of motor rotor 3.Blade part 2b is by constituting from a plurality of blades of base portion with the configuration of straight radial shape.Blade forming among the blade part 2b is the thin-walled that thickness is less than or equal to 0.5mm, and has curved part 2e shown in Fig. 2 (b).

The shape of turbine 2 is according to the circumferential flow pump size and difference, is that 20～30mm, thickness are that the situation of 3～4mm describes with diameter here.In addition, turbine 2 uses glass fibre to strengthen PPS by the molding and forming manufacturing, and this glass fibre strengthens PPS and used for example glass fiber-reinforced material.In molding and forming, the glass fibre that at high temperature is in molten state strengthens after the base portion 2a injection of PPS in metal pattern, is filled to the 2c of foreign steamer portion through blade part 2b.

In the present embodiment, make that the area of contour S1 of blade part 2b integral body is that S3:S1 is 9～15:1 with the ratio of the area of contour S3 of base portion 2a when the motor reel direction of motor rotor 3 is observed turbine.In addition, making the ratio of area of contour S1 and the area of contour S2 of the 2c of foreign steamer portion of the integral body of blade part 2b is that S2:S1 is 0.10～0.13:1.

In the turbine 2 that constitutes like this, the glass fibre that injects the base portion 2a in the metal pattern during molding and forming strengthens PPS, owing to after in being filled in base portion 2a equably, utilize fixing high pressure by blade part 2b, thus in curved part the randomness of fiber orientation also than higher.In addition, the glass fibre that flows into the foreign steamer 2c of portion from blade part 2b strengthens PPS because glass fibre discharges from high pressure, so that the randomness of fiber orientation than higher.

Fig. 3 be with the ratio S2/S1 between the area of contour S2 of the area of contour S1 of ratio S3/S1 between the area of contour S3 of the area of contour S1 of blade part 2b integral body and base portion 2a and blade part 2b integral body and the 2c of foreign steamer portion as parameter, turbine 2 is with respect to the performance plot of the swelling amount of ethanol contained in the fuel and toluene.This shows that in the scope of S3/S1=9～15 and S2/S1=0.10～0.13, the swelling amount is suppressed.This expresses, because the randomness of the fiber orientation of blade part 2b and the 2c of foreign steamer portion is than higher, so can suppress the swelling amount of blade part 2b and the 2c of foreign steamer portion.More preferably, in the scope of S3/S1=12～14 and S2/S1=0.10～0.13, the swelling amount is suppressed most.

Therefore, used the circumferential flow pump 1 of the turbine 2 of present embodiment, owing to can suppress blade part 2b and the 2c of foreign steamer portion swelling amount,, promptly can prevent the locked of turbine 2 so do not increase the space 7 between turbine 2 and the pump case 7 with respect to ethanol contained in the fuel and toluene.

Claims

1. circumferential flow pump, it possesses: discoideus turbine, itself and motor rotor are chimeric; And pump case, it takes in described turbine, and this circumferential flow pump imports fuel and send to internal-combustion engine from fuel tank,

Described turbine is made of the fiber reinforcement polyphenylene sulfide, and this turbine possesses: base portion, and itself and described motor rotor are chimeric; Blade part, it is arranged at the periphery of described base portion; And foreign steamer portion, it is arranged at the periphery of described blade part,

Described blade part has curved part simultaneously by constituting from a plurality of blades of described base portion with the configuration of straight radial shape,

It is characterized in that, when the motor reel direction of described motor rotor is observed described turbine, the area of contour S1 of described blade part integral body is S3:S1=9～15:1 with the ratio of the area of contour S3 of described base portion, and the area of contour S1 of described blade part integral body is S2:S1=0.10～0.13:1 with the ratio of the area of contour S2 of described foreign steamer portion.

2. circumferential flow pump according to claim 1 is characterized in that,

The area of contour S1 of described blade part integral body is S3:S1=12～14:1 with the ratio of the area of contour S3 of described base portion.