Unloading type spiral rotor

A screw and rotor technology, applied in the field of core components, can solve problems such as increased running resistance, affecting flexibility, flow meter sticking, etc., and achieves the effects of reducing resistance, enhancing flexibility, and reducing noise

Active Publication Date: 2008-05-14
HEFEI JINGDA INSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. When the two helical rotors are running, their upper and lower end faces are in contact with the upper and lower metering box cover plates, and the suction effect of the medium sandwiched between the two increases the running resistance, causing the flowmeter to stagnate during use. Bring reliability problems
[0005] 2. During the operation of the two helical rotors, the medium sandwiched between the two curved surfaces will also have an adsorption effect, which will increase the running resistance and affect the flexibility of its operation.

Method used

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  • Unloading type spiral rotor
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Embodiment Construction

[0021] Referring to Fig. 1 and Fig. 2, this embodiment is aimed at the structural form of the helical rotor flowmeter, and a housing 1 is provided, and there are two upper and lower metering box cover plates 6 and a pair of intermeshing helical rotors in the housing 1, that is, the left Helical rotor 2a and right helical rotor 2b.

[0022] As shown in Figure 1, in this embodiment, the rotor shaft 5 of the left helical rotor 2a is supported in the shaft holes on the upper and lower metering box cover plates 6 in the casing 1 through the sliding bearing 3, and a plane bearing is arranged on the end surface of the rotor 4. Both the sliding bearing 3 and the planar bearing 4 are made of flexible graphite with self-lubricating properties. This assembly structure can more effectively reduce wear between parts and improve the stability of moving parts.

[0023] In this embodiment, the tooth profile curve of the left helical rotor 2a is processed as shown in Fig. 2(a) and Fig. 3, spe...

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Abstract

An outloading screw rotor is characterized in that the tooth shape of the screw rotor consists of four sections of curves that are symmetrically arranged including an ab circular arc section, a bc involute section, a cd cycloid section and a de circular arc section. The curved surface on the center section of the bc involute section is provided with a curved surface outloading slot. The curved surface outloading slot perforates along the radial direction of a helicoid. The end surface of the rotor is provided with an end surface outloading slot. The end surface outloading slot extends to an f point of a wheel tooth center from the position of the slot mouth of a single-side curved outloading slot to the wheel tooth center. The invention is applied in a screw rotor flowmeter and leads the screw rotor flowmeter to overcome a clamping stagnation and insensitivity phenomenon through the effective outloading of the screw rotor.

Description

technical field [0001] The invention relates to the core component in the helical rotor flowmeter, the helical rotor. Background technique [0002] Spiral rotameters are widely used in petroleum, chemical industry, metallurgy, electric power, food, shipbuilding, military industry and other industries and commercial sectors for liquid flow detection, and can be matched with sending agencies and computer networking to realize remote centralized control. [0003] The helical rotameter consists of a housing, a helical rotor, a governor, a transmitter, and a counter. The pressure of the fluid acts on the unequal areas of the left-handed and right-handed helical rotors to generate a pressure difference, pushing the two rotors to mesh with each other along the regular curved surface and rotate in reverse, and the fluid under certain process conditions is transported out at a uniform speed . Metering the rotating speed of the screw rotor measures th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F15/00G01F1/20
Inventor 甘晓梅方锦华刘杰林琳
Owner HEFEI JINGDA INSTR
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