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Single shaft eccentric screw pump

An eccentric screw pump, single-shaft technology, applied in the direction of pumps, pump components, pump control, etc., can solve the problems of pushing, discharging pressure, discharging fluid, and unable to flow fully, so as to prevent the stator from wear and tear Effect

Active Publication Date: 2019-01-04
HEISHIN ENGINEERING & EQUIPMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, if the pressure is low, even if the rotor 101 is rotated, the fluid cannot flow sufficiently, and it is impossible to discharge the fluid at the desired discharge pressure.
[0005] In addition, since the air pressure directly acts on the stator 102, when the stator 102 is damaged such as a crack, air may leak from the damaged part.
At this time, the stator 102 cannot be pressed against the rotor 101 with the desired contact pressure.
In addition, air may be mixed into the fluid through the damaged part, or the fluid may flow out to the outside.
The air mixed in the fluid (especially food) will cause quality problems. On the contrary, if the fluid flows out to the surroundings, the outflow position will be polluted

Method used

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  • Single shaft eccentric screw pump
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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0038] figure 1 The uniaxial eccentric screw pump according to the first embodiment is shown. The uniaxial eccentric screw pump has a driver (not shown) provided at one end of a housing 1 and a pump body 2 provided at the other end.

[0039] The casing 1 is formed of a metal material in a cylindrical shape, and accommodates the coupling rod 3 . One end of the coupling rod 3 is connected to the coupling 4 so as to transmit the power from the driving machine. In addition, a connection pipe 5 is connected to the outer peripheral surface on one end side of the case 1 so that a fluid can be supplied from a tank or the like not shown.

[0040] The pump main body 2 accommodates a sleeve 7 , an outer casing 8 , a stator 9 , and a rotor 10 in a stator case 6 , and end studs 11 are attached to ends of the stator 9 .

[0041] The case 1 is connected to one end portion of the stator case 6 by connecting the flange portions to each other with bolts and nuts. In addition, the flange po...

no. 2 approach

[0062] Figure 4 The uniaxial eccentric screw pump according to the second embodiment is shown. This uniaxial eccentric screw pump is different from the first embodiment described above in the following points. In addition, in the following description, the same code|symbol is attached|subjected to the same part as 1st Embodiment, and the description is abbreviate|omitted.

[0063] The outer periphery of the stator 9 is provided with the outer casing 8 (the first outer casing part 28 and the second outer casing part 29 ) and the wound body 25 wound to position them around the stator 9 . The winding body 25 is an example of the holding member of the present invention. Then, the control fluid is injected into the sealed space 21 formed by the stator case 6 and the sleeve 7 arranged on the inner diameter side, and the sleeve 7 is expanded to the inner diameter side. The stator 9 is pressurized radially inwardly with the second case portion 29 .

[0064] An injection port 26 i...

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Abstract

The present invention provides a single -axis eccentric screw pump, which has: stator 9, rotor 10, shell 8, and mobile institutions 7.The body composition can be inserted into the stator 9; the above shell 8 can be moved between the 1st position of the outer peripheral side of the stator 9 and the second position of the compressor 9;2 movement between positions.As a result, stabilize the contact pressure of the rotor 10, and discharge flow animals with the expected excretion pressure.

Description

technical field [0001] The invention relates to a uniaxial eccentric screw pump. Background technique [0002] Generally, in a uniaxial eccentric screw pump, the stator expands and contracts according to changes in liquid temperature or air temperature, and therefore, it is sometimes difficult to convey a fluid in an appropriate state corresponding to these changes. For example, in CIP (Cleaning In Place: cleaning in place) and SIP (Steriling In Place: sterilization in place), high temperature steam or hot water is made to flow in the stator, and this problem occurs. In addition, if the stator is worn and the interference with the rotor is reduced, the fluid cannot be properly conveyed, and if the stator expands greatly as described above, it is easy to wear and needs to be replaced with a new stator or rotor in advance. [0003] Conventionally, as a uniaxial eccentric screw pump that can cope with this problem, it is known that a stator made of an elastic body is accommoda...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C2/107F04C15/00
CPCF04C2/1071F04C14/18F04C2270/185F04C2/107F04C15/00
Inventor 山根哲男塚本健斗
Owner HEISHIN ENGINEERING & EQUIPMENT CO LTD
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