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Planetary rotor pump

A rotor pump and planetary technology, applied in the transmission field, can solve the problems of affecting the service life of planetary rotors and large wear effects, and achieve the effects of convenient adjustment and maintenance, prolonging life, and reducing force wear

Inactive Publication Date: 2018-11-20
SHANGHAI HAOLEIFENG AUTOMATION EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, when the scalloped surface of the worm is in direct physical contact with the scalloped surface of the planet gear, the wear effect is greater, which directly affects the service life of the planetary rotor

Method used

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  • Planetary rotor pump
  • Planetary rotor pump
  • Planetary rotor pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Planetary rotor pumps, such as figure 2 , image 3 , Figure 4 As shown, it includes a main motor 2, a circular worm 3, a planetary rotor 1, an encoder 4, a servo motor 5 and a control circuit;

[0038] The planetary rotor 1, such as figure 1 As shown, it includes a planetary carrier 11, a main shaft 12, a plurality of planetary gears 14, and a plurality of planetary gear shafts 13;

[0039] The planet carrier 11 is disc-shaped;

[0040] The main shaft 12 is perpendicular to the planet carrier 11 and fixed at the center of the planet carrier 11;

[0041] Each planet wheel shaft 13, perpendicular to the planet carrier 11, is evenly distributed on the planet wheel carrier 11 and has an equal distance to the center of the planet carrier 11;

[0042] Each planetary wheel 14 is respectively fixed on each planetary wheel shaft 13;

[0043] One end of the scalloped worm 3 is connected to the output shaft of the main motor 2 through a first coupling 81, and the other end...

Embodiment 2

[0051] Based on the planetary rotor pump of embodiment one, such as Figure 5 As shown, it also includes servo drive and signal conversion card;

[0052] Described control circuit adopts PLC (programmable logic controller);

[0053]The servo driver is used to drive the servo motor, make the servo motor move according to the output control speed, and output the long-line feedback signal to the PLC. The signal conversion card converts the long-line feedback signal output by the servo driver into an open-collector signal that can be received by the PLC.

[0054] Preferably, the servo motor 5 is connected to the main shaft 12 of the planetary rotor 1 through a reducer 6 .

[0055] Preferably, the main motor 2 is an AC motor. The main motor requires a large power, generally above 15kw. In order to save costs, an ordinary AC motor can be used. In practical application, if you don't care about the cost and want to achieve better control effect, the main motor can choose frequency...

Embodiment 3

[0058] Based on the planetary rotor pump of embodiment one, such as Figure 6 As shown, the following speed Vf of the servo motor is:

[0059] Vf=Vm / (K1*K2), Vm is the speed of the main motor, K1 is the reduction ratio between the scalloped worm and the planetary rotor, and K2 is the reduction ratio of the reducer on the servo motor side;

[0060] The following position deviation e of the servo motor is:

[0061] e=Xm / (K1*K2)-y, Xm is the rotational angle position of the main motor, and y is the numerical value calculated by first-order differential calculation of the rotational angle position value of the servo motor.

[0062] Due to the large fluctuations in the running speed of ordinary AC motors, an effective motion control model needs to be established in order to quickly track the speed and position of the AC motor and control the mechanical gap within the adjustable range of the following servo motor.

[0063] PID control is composed of proportional, integral and diff...

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PUM

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Abstract

The invention discloses a planet rotor pump which comprises a main motor, a circular tooth worm, a planet rotor, a coder, a servo motor and a control circuit. One end of the circular tooth worm is connected with an output shaft of the main motor through a first coupler, and the other end of the circular tooth worm is connected with the coder through a second coupler. The middle circular tooth face of the circular tooth worm is mechanically engaged with planet wheels of the planet rotor. The servo motor is connected with a spindle of the planet rotor. The coder is used for measuring the rotating speed and corner position of the main motor. The control circuit calculates and outputs the following speed and a position signal of the servo motor according to the rotating speed and a corner position signal of the main motor and controls the servo motor to drive the planet rotor to rotate through the spindle so as to enable the planet wheels on the planet rotor and circular teeth of the circular tooth worm to be matched and engaged sequentially and synchronously. The planet rotor pump is simple in mechanical structure, convenient to mount, adjust and maintain, and capable of reducing force abrasion between the planet wheels of the planet rotor and the circular teeth and prolonging the service life of the planet rotor pump.

Description

technical field [0001] The invention relates to transmission technology, in particular to a planetary rotor pump. Background technique [0002] Rotor pumps are also called colloid pumps, cam pumps, three-lobe pumps, universal delivery pumps, etc. Rotor pumps are positive displacement pumps. It achieves the purpose of delivering fluid by means of the periodic conversion of multiple fixed volume delivery units in the working chamber. The mechanical energy of the motor is directly converted into the pressure energy of the conveying fluid through the pump. The flow rate of the pump depends only on the volume change value of the working chamber and its change frequency per unit time, and (theoretically) has nothing to do with the discharge pressure; the rotor pump in the working process In fact, through a pair of synchronously rotating rotors, the rotors are driven by a pair of synchronous gears in the box. Driven by the main and auxiliary shafts, the rotors rotate synchronously...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C14/00
Inventor 徐金仙
Owner SHANGHAI HAOLEIFENG AUTOMATION EQUIP CO LTD