Variable displacement pump
A technology of variable pump and pump body, applied in pump, pump control, rotary piston pump, etc., can solve the problems of high cost, complex structure and difficult processing, and achieve the effect of low cost, simple structure and easy processing.
Active Publication Date: 2010-12-29
FAWER AUTOMOTIVE PARTS
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Problems solved by technology
[0006] The invention discloses a variable displacement pump, which solves the problems in the prior art that the input fluid medium may be limited to cause early cavitation, and the structure is very complicated, difficult to process, and high in cost.
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[0026] The following is an embodiment of the present invention.
[0027] Such as figure 1 , figure 2 , image 3 , Figure 4 As shown; the present invention includes a pump cover 1, a return spring 2, a non-rotating return spring end seal ring 3, an outer rotor 4, an inner rotor 5, a pump body 6, a transmission shaft 7; a pressure control end seal ring 8; a pressure control chamber , the pump inlet 1c, 1d and the pump outlet 1a, 1b; the inner rotor 5 and the outer rotor 4 are Duo IC tooth-shaped design, the pump body 6 defines the pump rotor chamber, the inner rotor 5 is located in the outer rotor 4, and the inner rotor 5 and the outer rotor The rotor 4 is meshed, and the outer rotor 4 rotates eccentrically around the rotation axis of the inner rotor 5; the transmission shaft 7 is press-fitted with the inner rotor 5, and the transmission shaft and the inner rotor assembly rotate to drive the outer rotor 4, so that the transmission shaft 7 rotates , an isolated high-pressu...
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The invention discloses a variable pump, which comprises a body, a cover, an inner rotor, an outer rotor, a shaft, and an inlet and an outlet of the pump. The variable pump is characterized by also comprising an offsetting spring, an offsetting spring end sealing ring, a pressure control structure and a pressure control end sealing ring, wherein the shaft is matched with the inner rotor in a modeof rotation prevention; the body and the cover are provided with a cylindrical surface for guiding and sealing the offsetting spring end sealing ring and the pressure control end sealing ring, and the diameter of the cylindrical surface is equal to the outer diameter of the inner rotor; high pressure and low pressure cavities of the pump are jointly isolated and sealed by the cylindrical surface of the body and the cover with the offsetting spring end sealing ring and the pressure control end sealing ring; and the pump is provided with an offsetting spring compression displacement stop block.When the variable operation is carried out, the pressure control structure provides pressure so that the end face of the outer rotor is tightly pressed by the pressure control end sealing ring to resist the pressure of the offsetting spring to ensure that the outer rotor shifts axially around the inner rotor. By changing the meshing tine length of the rotors and the output quantity of the pump, the variable pump has the advantages of difficult cavitation erosion, energy conservation, simple structure, easy process, few parts, low cost, difficult generation of clamping stagnation and attrition, few products and no faults for products.
Description
technical field [0001] The invention relates to a variable volume pump with variable volume flow, in particular discloses a rotor type variable volume pump with variable volume flow, which belongs to the technical field of engineering machinery and engine lubrication. Background technique [0002] As we all know, the rotor pump has an inner rotor with a given number of teeth and an outer rotor with one tooth more than the number of teeth of the inner rotor. The inner rotor or the outer rotor may have a trochoidal tooth profile, a cycloidal tooth profile, a Duocentric tooth profile, a Duo IC tooth profile, or a Parachoid Toothed rotor toothed and many other forms. Rotary lobe pumps are used in various fluid media transfer applications such as automotive engine lubrication pumps, transmission lubrication pumps, and electric drive gasoline pumps. The disadvantage of the rotary lobe pump is that it is not easy to change the volume capacity. Rotary lobe pumps generally have a p...
Claims
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IPC IPC(8): F04C2/10F04C14/24F04C14/00
Inventor 冉丽红王绍春
Owner FAWER AUTOMOTIVE PARTS