Rotor

Abstract

The utility model discloses a rotor, which solves the problems of narrow applicability and easy damage of a rotor in a double-cam rotor pump in the prior art, and comprises an inner core and an outer shell, and the outer shell is formed by molding engineering plastics on the outer side of the inner core of the rotor, so that the rotor can be used for transporting corrosive liquid, the applicability of the rotor is increased, and the service life of the rotor is prolonged. Due to the fact that the sealing performance of the engineering plastics is better, when the two rotors rotate relatively, large suction force can be achieved, the two rotors can be suitable for viscous liquid, when the two rotors rotate, corresponding friction does not exist between the two rotors, the shell can be prevented from being damaged by friction, and even if the shell is used for a long time, only the shell needs to be detached, and the shell can be conveniently detached. The rotor inner core does not need to be replaced, and cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of double cam rotor pump technology, and specifically to a rotor. Background Technology

[0002] Cam-type rotary pumps are crucial equipment in material (slurry) conveying systems during chemical fiber production. The rotors have a certain gap between them, resulting in zero friction and a long service life. They are widely used in many engineering projects, such as petrochemicals, fine chemicals, daily chemicals, chemical fibers, pharmaceuticals, food, pesticides, fertilizers, environmental protection, papermaking, resins, inks, and metallurgy. Their principle involves two synchronously moving rotors driven by an external synchronous gearbox. Driven by the transmission shaft, the rotors rotate synchronously in opposite directions, creating a high vacuum and discharge pressure. To ensure a proper fit between the two rotors, they are usually covered with rubber or a coating to reduce the gap and maintain suction. Even with good wear resistance, friction still exists during operation, causing wear. Furthermore, poor sealing between the rubber components results in lower suction during rotor rotation. Rubber's poor corrosion resistance also limits its applicability in chemical and pharmaceutical fields. For coatings, damage to the coating necessitates replacement of the rotor core, leading to high costs. Utility Model Content

[0003] This utility model addresses the aforementioned problems. Its purpose is to provide a rotor that improves the corrosion resistance of the rotor shell by molding an engineering plastic shell onto the rotor core, and also enhances the suction force when the rotor rotates, making it suitable for the transmission of viscous liquids.

[0004] To achieve the above objectives, this utility model provides a rotor, comprising:

[0005] The inner core has several protruding rotating blades.

[0006] The outer casing is disposed outside the inner core and is made of engineering plastic.

[0007] According to the rotor described above, the inner core includes a connecting part and a blade protruding from the connecting part. The connecting part has an annular cross-section, and a plurality of the blades are distributed at equal intervals on the outer side of the connecting part.

[0008] According to the rotor described above, each of the blades is provided with a positioning hole, and the horizontal height of the upper surface of the blade is lower than the horizontal height of the upper surface of the connecting part.

[0009] According to the rotor described above, a through hole is provided in the middle of the connecting part, and a gear is provided on the inner wall of the through hole.

[0010] According to the rotor described above, the outer casing covers the rotor blades.

[0011] This utility model has the following beneficial effects:

[0012] 1. The outer shell is made of engineering plastic, which has good corrosion resistance and can be used for transportation of corrosive liquids.

[0013] 2. After engineering plastics are fitted onto the rotor, the sealing between the rotors is better, the suction is stronger, and it can also be used for transporting relatively viscous liquids, making it highly adaptable.

[0014] 3. When the rotors move relative to each other, there will be no friction between the engineering plastics, avoiding wear of the engineering plastics. Even after the engineering plastics are worn, it is only necessary to remove the engineering plastics and then mold new engineering plastics onto the rotor core, which can save a lot of costs.

[0015] 4. By molding the outer shell onto the rotor core, if the outer shell is damaged, it can be simply removed from the rotor core without replacing the rotor core, which effectively reduces costs.

[0016] 5. The outer shell is precision machined to ensure a smooth surface and dimensional accuracy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the inner core structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall rotor structure of this utility model;

[0019] Figure 3 This is the overall flowchart of this utility model;

[0020] Figure 4 This is a detailed flowchart of this utility model. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] like Figure 1-2 As shown, a rotor includes:

[0023] The inner core 100 has several protruding blades 110. In a double cam rotor pump, there are usually two rotors that rotate relative to each other. The liquid is drawn in and sprayed out by the gap between the blades 110 of the two rotors. In this embodiment, a three-blade rotor is used, that is, three blades 110 are provided on the inner core 100.

[0024] The outer shell 200 is disposed outside the inner core 100 and is made of engineering plastic. In this embodiment, the engineering plastic used is PTFE, which has good corrosion resistance and heat resistance, and is basically insoluble in all fluxes. This makes the rotor shell 200 more versatile, and the PTFE material also has good sealing properties, resulting in greater suction force when the rotor rotates, making it suitable for transporting viscous liquids. Of course, other engineering plastics can also be used, as long as they achieve the effects of this application, and do not exceed the protection scope of this application.

[0025] The inner core 100 includes a connecting part 120 and a rotating blade 110 protruding from the connecting part 120. The connecting part 120 has an annular cross-section, and several rotating blades 110 are distributed at equal intervals on the outer side of the connecting part 120. The connecting part 120 is used to connect with other components and drive the rotating blades 110 to rotate, thereby using the gap between the meshing of the two rotor blades 110 to pump the liquid.

[0026] Preferably, a through hole 121 is provided in the middle of the connecting part 120, and a gear 122 is provided on the inner wall of the through hole 121. One end of the shaft of the gear 122 can be placed in the through hole 121 so that it meshes with the gear 122 on the inner wall of the through hole 121, thereby driving the connecting part 120 to rotate, and in turn driving the rotor to rotate as a whole to perform work.

[0027] Preferably, each of the three blades 110 is provided with a positioning hole 111, and the horizontal height of the upper surface of the blade 110 is lower than the horizontal height of the upper surface of the connecting part 120. After the housing 200 is installed, the housing 200 covers the blade 110, and at this time the horizontal height of the upper surface of the blade 110 is equal to the horizontal height of the upper surface of the housing 200. The positioning hole 111 provided on the blade 110 can facilitate the assembly of the housing 200.

[0028] like Figure 3-4 As shown, a method for manufacturing a rotor includes the following steps:

[0029] S1: Select an alloy material and wire cut it to form the inner core. The alloy material is usually the common 45# steel. After selecting the material, there are two more steps:

[0030] First, S11: The shape of the wire-cut alloy material is made by wire cutting the protruding blades on the side of the inner core.

[0031] Next, S12: wire-cut the through holes and gears in the alloy material to form the inner core.

[0032] S2: Select engineering plastics and process them to form the outer shell. The selected engineering plastic is PTFE, and the processing also includes two steps:

[0033] First, S21: Machining the outer and inner diameters of the engineering plastic. First, the selected engineering plastic is machined into a cylindrical shape with a radius greater than the distance from the center of the inner core to the top surface of the blade. Then, an inner hole is machined in the middle of the engineering plastic.

[0034] S22: The inner groove of the engineering plastic is machined in the machining center to form the outer shell, and the inner groove can be used to install the inner core.

[0035] S3: Assemble the inner core into the outer casing.

[0036] S4: By molding the outer shell, the outer shell is combined with the inner core and covers the rotating blade of the inner core. The molding includes high pressure molding and room temperature molding, and is not limited to a single molding method. During the molding process, the outer shell is squeezed. Since the horizontal height of the upper surface of the rotating blade is lower than the horizontal height of the upper surface of the connecting part, the outer shell will first cover the upper surface of the rotating blade until the horizontal height of the upper surface of the outer shell is the same as that of the upper surface of the connecting part.

[0037] S5: Machining the outer shell shape. The outer shell shape is machined to resemble the inner core shape, so that the blades of the two rotors can mesh with each other. The precision machining of the outer shell shape can also make the outer side of the shell more accurate and avoid mutual friction.

[0038] This utility model provides a rotor and its manufacturing method. By molding engineering plastic to form a shell on the outside of the rotor core, the rotor can be used for transporting corrosive liquids, increasing its applicability. Due to the better sealing performance of engineering plastic, the two rotors can have a greater suction force when rotating relative to each other, making it suitable for viscous liquids. Moreover, there is no friction between the two rotors when they rotate, which can avoid friction damage to the shell. Even if the shell has been used for a long time, only the shell needs to be removed, without replacing the rotor core, thus saving costs.

[0039] The technical solution of this utility model has been described in detail above with reference to the accompanying drawings. The described embodiments are used to help understand the concept of this utility model. The specific embodiments described herein are merely illustrative examples of the spirit of this utility model. Those skilled in the art to which this utility model pertains can make various modifications or additions to the described specific embodiments or use similar methods to replace them, but without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A rotor, characterized in that, include: The inner core has several protruding rotating blades. The outer casing is disposed outside the inner core and is made of engineering plastic.

2. A rotor according to claim 1, characterized in that, The inner core includes a connecting part and a rotating blade protruding from the connecting part. The connecting part has a circular cross-section, and a plurality of the rotating blades are distributed at equal intervals on the outer side of the connecting part.

3. A rotor according to claim 2, characterized in that, Each of the blades is provided with a positioning hole, and the horizontal height of the upper surface of the blade is lower than the horizontal height of the upper surface of the connecting part.

4. A rotor according to claim 2, characterized in that, A through hole is provided in the middle of the connecting part, and a gear is provided on the inner wall of the through hole.

5. A rotor according to claim 3, characterized in that, The outer shell covers the rotor blade.

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