CN2396208Y - High-concentration sludge rotor pump - Google Patents

Abstract

The rotor pump of high concentration sludge is mainly composed of a protective cover, a balance eccentric wheel, a cylinder end cover, a cylinder, an eccentric rotor, a drum, a large gear, a small gear, a key, a bearing, a transmission shaft, an eccentric pulley, a slide plate, and a spring Its working principle is to use the eccentric rotor to make revolution and rotation around the transmission shaft in the cylinder to change the size of the working volume, so as to achieve the suction and discharge of high-concentration materials. It has the advantages of easy work, stable operation, small vibration and wide application range.

Description

High concentration sludge rotary pump

The utility model relates to an impurity pump, in particular to a high-concentration sludge rotor pump.

Before the utility model was made, when dredging the river, in addition to clearing floating mud, it was often necessary to clear high-concentration sludge (such as hardened mud). With the disadvantages of low work efficiency and low mud content (generally less than 5%), it is often helpless to deal with such problems. The patented two-angle rotor pump (China Invention Patent No. 86104412) and the double-arc rotor pump (CN2198419Y) provide ideas. The basic principle is transformed from a triangular piston engine. In addition to the rotation and revolution of the shaft, translational motion is also required relative to the shaft. The disadvantages of this are:

1. During the operation of the rotor, it will move periodically relative to the shaft, causing impact, which not only increases the friction between the rotor and the contour of the pump body, reduces the efficiency, but also makes the movement unstable, with large vibration and almost cannot be eliminated.

2. The torque of the transmission shaft will also change periodically during the movement, which may cause fatigue damage to the rotating shaft, and when the rotor rotates to a certain point, it is likely to be stuck in operation.

In short, the biggest disadvantage of this type of pump is unstable operation and large vibration. This is because this type of structure cannot maintain a constant eccentricity, which will inevitably reduce the limit speed of the pump shaft and greatly reduce the working flow, making it only suitable for The situation of low speed and small structure greatly limits its application range.

The task of the utility model is to overcome the shortcomings of the prior art and provide a high-concentration sludge rotor pump with reasonable structure, stable operation, small vibration and wide application range.

The high-concentration sludge rotor pump mainly consists of a protective cover 1, a balance eccentric wheel 2, a cylinder end cover 3, a cylinder 4, an eccentric rotor 5, a drum 6, a large gear 7, a small gear 8, a key 9, a bearing 10, Transmission shaft 11, eccentric pulley 12, slide plate 13, spring 14 are composed, large gear 7 is fixed on eccentric rotor 5, pinion 8 is fixed on cylinder 4, small gear 8 and large gear 7 mesh with each other, transmission shaft 11 and The rotary cylinder 6 is connected, the pinion 8 and the transmission shaft 11 are in clearance fit, the rotary cylinder 6 is set in the eccentric rotor 5, the two corners of the eccentric rotor 5 are equipped with slide plates 13, and the bottom of the slide plate 13 is equipped with radial compensation. Spring 14, balance eccentric wheel 2 and eccentric belt pulley 12 are equipped with on the left and right sides of cylinder block 4, and the actual profile of eccentric rotor 5 external shape is ρ=L-2rsinv.

Fig. 1 is a schematic diagram of the front view of a high-concentration sludge rotor pump, and Fig. 2 is a schematic diagram of a left-view structure of a high-concentration sludge rotor pump.

Among them, 1-protective cover, 2-balanced eccentric wheel, 3-cylinder end cover, 4-cylinder, 5-eccentric rotor, 6-drum, 7-big gear, 8-pinion, 9-key, 10 -bearing, 11-transmission shaft, 12-eccentric pulley, 13-slide plate, 14-spring.

Fig. 1, Fig. 2 are an embodiment of the present utility model. As shown in Fig. 1 and Fig. 2, the working principle and implementation plan of the present utility model are: a high-concentration sludge rotor pump, mainly composed of a protective cover 1, a balance eccentric wheel 2, a cylinder end cover 3, a cylinder body 4, and an eccentric rotor 5. Drum 6, large gear 7, pinion 8, key 9, bearing 10, transmission shaft 11, eccentric pulley 12, slide plate 13, spring 14, large gear 7 is fixed on eccentric rotor 5, pinion 8 is fixed On the cylinder body 4, the pinion 8 and the bull gear 7 mesh with each other, the gear ratio of the bull gear and the pinion is 1:2, the transmission shaft 11 is connected with the drum 6, and the pinion 8 and the transmission shaft 11 are in clearance fit. The drum 6 is set in the eccentric rotor 5, the two corners of the eccentric rotor 5 are equipped with a slide plate 13, the bottom of the slide plate 13 is equipped with a spring 14 with radial compensation capability, and the left and right sides of the cylinder body 4 are equipped with a balance eccentric wheel 2 and an eccentric belt. Wheel 12, the actual profile of the external shape of the eccentric rotor 5 is ρ=L-2rsinv.

其中r为小齿轮8的节圆半径，L为偏心转子5的角点到其中心的距离。For the high-concentration rotor pump shown in Figures 1 and 2, the theoretical curve of the inner contour line of the cylinder body 4 is essentially the motion trajectory of the corner point of the eccentric rotor 5 when the rotor rotates and revolves around the pinion 8, so it is used in manufacturing The inner contour of the cylinder body 4 is not complicated. The equation of the inner contour line of the cylinder block 4 is

Where r is the radius of the pitch circle of the pinion 8, and L is the distance from the corner point of the eccentric rotor 5 to its center.

其中a＝2r/L。写成极坐标形式为： $\mathrm{\ρ}=\sqrt{x^2+y^2}=\sqrt{L^2-4\mathrm{rL}+4r^2{\sin }^{2}v}----\left(3\right)$ (3)式可以进一步简化为：ρ＝L-2rsinv                   (4)(4)式即为以极坐标形式表示的偏心转子5外部形状的实际型线，与其它该类泵相比，其表达式十分简单。从理论上说，满足强度的前提下，只要偏心转子5外部形状的型线包含在缸体4内轮廓线的内包络线内，保证密封的前提下，偏心转子5和缸体4就不会发生卡死现象。为了针对实际情况，可以对偏心转子作适当处理(见图2)，按(4)式加工后，在偏心转子5挖出四个凹槽，目的是为了防止硬物(如石块)卡住，使其更好的应用于高浓度污泥(或其它物料)的排、吸作用，由于该泵工作容积大，偏心转子5高速旋转时形成真空产生较大的吸力，使该泵在吸取高浓度污泥具有独到的能力，解决了现有技术存在的问题。The theoretical profile of the external shape of the eccentric rotor 5 is the inner envelope of the inner contour of the cylinder 4, so the theoretical profile of the external status of the eccentric rotor 5 can be obtained as

where a=2r/L. Written in polar coordinates as: $\mathrm{\ρ}=\sqrt{x^2+{\mathrm{the\; y}}^2}=\sqrt{L^2-4R+4r^2{\sin }^{2}v}----\left(3\right)$ Formula (3) can be further simplified as: ρ=L-2rsinv (4) Formula (4) is the actual profile of the external shape of the eccentric rotor 5 expressed in polar coordinates. Compared with other pumps of this type, the expression Very simple. Theoretically speaking, under the premise of satisfying the strength, as long as the profile line of the external shape of the eccentric rotor 5 is included in the inner envelope of the inner contour line of the cylinder body 4, and on the premise of ensuring the sealing, the eccentric rotor 5 and the cylinder body 4 will not Stuck phenomenon will occur. In order to address the actual situation, the eccentric rotor can be properly treated (see Figure 2). After processing according to (4), four grooves are dug out in the eccentric rotor 5 to prevent hard objects (such as stones) from getting stuck. , so that it is better applied to the discharge and suction of high-concentration sludge (or other materials). Due to the large working volume of the pump, the eccentric rotor 5 forms a vacuum when it rotates at a high speed to generate a large suction force, so that the pump can absorb high Concentrated sludge has a unique ability to solve the problems existing in the prior art.

In order to reduce friction loss, the two ends of the eccentric rotor 5 are matched with the end faces of the cylinder body 4 and the end cover 3 with a sliding gap, and the sealing between the two sides of the eccentric rotor 5 is realized by a sealing ring. The two corners of the eccentric rotor 5 are equipped with a slide plate 13, and the bottom of the slide plate 13 is equipped with a spring 14 with a certain elasticity. It has a radial compensation function, thereby reducing the friction between the slide plate 13 and the cylinder body 4, and preventing the eccentric rotor 5 from being stuck between the cylinder body 4. When the transmission shaft 11 rotates one circle (360°), and the eccentric rotor 5 rotates half a circle (180°), it can be noticed from Fig. 2 that the eccentric rotor 5 rotates half a circle to complete a suction and discharge process, and the center of the eccentric rotor 5 is always It revolves around the center of the transmission shaft 11, and its eccentricity is always kept as r, so its balance problem is not difficult to solve. In the past, similar devices could not maintain a constant eccentricity. This device balances the eccentric wheel 2 and the eccentric pulley 12 to eliminate its inertial force and moment of inertia, while the eccentric rotor 5 revolves around the center of the transmission shaft 11 in the cylinder body 4, due to the interaction between the large gear 7 on the eccentric rotor 5 and the pinion gear 8 on the cylinder body 4 The meshing makes the eccentric rotor 5 rotate around its own center, its rotation speed is 1/2 of the transmission shaft speed, the angular acceleration is zero, and its motion is relatively stable.

The high-concentration sludge rotor pump of the utility model has reasonable structure, small volume, light weight, few parts, large working volume, simple profile, and large sludge suction capacity. The biggest advantage is that it is suitable for the suction, At the same time, it solves the defects of large vibration and unstable operation in the prior art. In terms of the ability to absorb high-concentration materials, it has a good application prospect.

Claims (1)

1. high concentration sludge rotor pump, include protective housing (1), counterbalanced eccentric (2), cylinder end caps (3), cylinder body (4), eccentric rotor (5), rotating cylinder (6), gearwheel (7), small gear (8), key (9), bearing (10), transmission shaft (11), eccentric belt wheel (12), slide plate (13), spring (14), it is characterized in that gearwheel (7) is fixed on the eccentric rotor (5), small gear (8) is fixed on the cylinder body (4), gearwheel (7) and small gear (8) are meshing with each other, transmission shaft (11) connects with rotating cylinder (6), be Spielpassung between small gear 8 and the transmission shaft 11, rotating cylinder (6) is arranged in the eccentric rotor (5), (5) two jiaos of ends of eccentric rotor are equipped with slide plate (13), the spring (14) with radial compensation ability is equipped with in slide plate (13) bottom, counterbalanced eccentric (2) and eccentric belt wheel (12) are equipped with in cylinder body (4) left and right sides, and the actual molded lines of eccentric rotor (5) external shape is ρ=L-2rsinv.

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