Seal type tooth-form molded line screw rod
A sealed, screw technology, used in rotary piston machinery, rotary piston/oscillating piston pump components, machines/engines, etc., can solve the tooth meshing relationship and design deviation, reduce pump volume efficiency, and reduce screw design. performance indicators and other issues, to achieve the effect of improving running performance, improving mechanical efficiency, and simple tooth profile
Active Publication Date: 2012-04-04
黄山众拓工业泵制造有限公司
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Problems solved by technology
[0007] 3. Adjacent tooth grooves after the meshing of the screw are connected to each other due to the leakage triangle defect of the tooth shape itself, thereby reducing the volumetric efficiency of the pump;
[0008] 4. Due to the existence of the working gap of the screw in use, the meshing relationship of the teeth deviates seriously from the design, thereby reducing the design performance index of the screw
Method used
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[0027] figure 1 Shown is a schematic diagram of the shaft section of the sealed tooth structure of the screw. The tooth profile is continuously composed of four parts: arc ab, cycloid bc, arc cd, and oblique line de. The tooth profile is symmetrical to each other. The junction of the cycloid bc and the screw rod and the outer circle is composed of circular arc cd and oblique line de, which reduces the friction area between the screw rod and the hole, and also adds the function of forming an oil wedge; the ab line, cd line, and de line ensure that the screw rod Under the working gap, the bc line will not be damaged, thus ensuring the stability of the working parameters of the pump.
[0028] figure 2 It is a schematic diagram of the sealed tooth profile curve of the screw. The tooth profile is continuously composed of four parts: arc ab, cycloid bc, arc cd, and oblique line de. According to the same size and profile of the master and slave screw teeth, The condition of meshin...
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Abstract
The invention relates to a seal type tooth-form molded line screw rod suitable for a dual-screw pump. The seal type tooth-form molded line screw rod comprises a master screw and a slave screw, wherein the end sections of the master and slave screws are respectively composed of a bottom circle, a nodal circle and an excircle, and the tooth-form molded lines of the master and slave screw are meshed and identical and are respectively and continuously composed of four parts including a circular arc ab, a cycloid bc, a circular arc cd and an oblique line de; each circular arc ab is tangential to the bottom circle of the corresponding screw on a shaft section; and each circular arc cd and each oblique line de are respectively butt-jointed with the excircle of the corresponding screw. According to the seal type tooth-form molded line screw rod disclosed by the invention, the tooth-form molded lines are simple and smooth, and the mechanical efficiency and the volume fraction of the screw pump are increased.
Description
[0001] technical field [0002] The invention relates to a twin-screw pump, in particular to a design technology for a sealed tooth profile of a twin-screw pump. [0003] Background technique [0004] The screw pump is a device commonly used in the petroleum, chemical, paper and other industries to transport viscous liquids or liquids with particles. Between the suction port and the discharge port of the pump, it will be divided into one or more sealed spaces, and then the rotation of the screw is used to realize the suction and discharge of liquid. In the prior art, due to the different scope of application of the pump, the tooth profile of the screw of the screw pump is also different, such as A type, B type, C type, D type, etc. These tooth profile lines are used during the application process The following problems exist: [0005] 1. The meshing relationship is complex. The tooth-shaped meshing line consists of two or more sections. The number of screw heads and leads...
Claims
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Login to View More IPC IPC(8): F04C15/00F04C2/16
Inventor 徐树林洪灶成徐建军
Owner 黄山众拓工业泵制造有限公司