CN-117722347-B - Stator and screw pump

Abstract

The invention belongs to the field of screw pumps, and particularly relates to a screw pump which comprises a pump body shell, a stator shell, a main shaft, a fast-assembling rotor and a connecting mechanism, wherein the main shaft is arranged in the pump body shell, one end of the main shaft is connected with a driving part, the other end of the main shaft is connected with the fast-assembling rotor through the connecting mechanism, the fast-assembling rotor is arranged in the stator shell, the connecting mechanism is used for rotating to connect the main shaft and the fast-assembling rotor, compared with the prior art, the invention improves the installation and maintenance efficiency of the screw pump, saves time and labor cost, designs the stator shell into a wave-shaped structure with consistent wall thickness, has more reliable use, long service life, convenient replacement and maintenance, and has even wall thickness, reliable dynamic balance of the rotor and stable operation of the pump.

Inventors

• CHU XIEJUN
• HONG ZAOCHENG

Assignees

• 江苏龙力泵阀制造有限公司

Dates

Publication Date

20260505

Application Date

20240130

Claims (2)

1. 1. The screw pump is characterized by comprising a pump body shell (1), a stator shell (4), a main shaft (2), a fast-assembling rotor (5) and a connecting mechanism (3); The pump body shell (1) is internally provided with the main shaft (2), one end of the main shaft (2) is connected with a driving part, the other end of the main shaft is connected with the fast-assembling rotor (5) through the connecting mechanism (3), and the fast-assembling rotor (5) is arranged in the stator shell (4); The connecting mechanism (3) is used for rotating to connect the main shaft (2) and the quick-mounting rotor (5); The connecting mechanism (3) comprises a connecting sleeve (301), a limiting ring sleeve (303) and a fixing protrusion (304); The connecting sleeve (301) is provided with an installation cavity with an opening, one end of the main shaft (2) is inserted into the installation cavity, the outer side surface of the main shaft (2) is fixedly connected with the fixing protrusion (304), and the inner wall surface of the connecting sleeve (301) is connected with the limiting ring sleeve (303); the limiting ring sleeve (303) is provided with a notch part matched with the fixing protrusion (304), the fixing protrusion (304) penetrates through the notch part and is staggered with the notch part, and the fixing protrusion (304) is abutted against the end face of the limiting ring sleeve (303), so that axial constraint is formed; The outer side surface of the connecting sleeve (301) is fixedly connected with a first annular plate (311), the main shaft (2) is fixedly connected with a second annular plate (302), the second annular plate (302) is provided with a limiting pin (307), the first annular plate (311) is provided with a limiting hole, and the limiting pin (307) is inserted into the limiting hole and forms a circumferential limiting structure; The limiting hole is of an arc-shaped hole structure and comprises an arc-shaped section (313), a large hole section (314) and a radial section (312); The two ends of the arc-shaped section (313) are respectively provided with the macroporous section (314) and the radial section (312), the inner diameter of the macroporous section (314) is larger than the widths of the arc-shaped section (313) and the radial section (312), the radial section (312) is positioned in the radial direction of the first annular plate (311), and the arc-shaped section (313) is positioned in the circumferential direction of the first annular plate (311); One end of the limiting pin (307) penetrates through the limiting hole and is provided with a limiting part (3071), the width of the limiting part (3071) is larger than the diameter of the limiting pin (307), the limiting pin (307) is used for penetrating through the large hole section (314), and after the second annular plate (302) rotates, the limiting part (3071) is abutted against the first annular plate (311); when the limiting pin (307) is positioned on the radial section (312), the fixing protrusion (304) is staggered with the notch part, and when the limiting pin (307) is positioned on the large hole section (314), the fixing protrusion (304) is positioned in the direction of the notch part; The radial direction of second crown plate (302) is provided with waist type hole and slide hole, waist type hole one end intercommunication the one end of slide hole, the other end of slide hole is in set up the opening on the global of second crown plate (302), spacer pin (307) are passed waist type hole, the one end of slide bar (308) is connected fixedly to the side of spacer pin (307), the other end slidable of slide bar (308) is passed the slide hole, cup joint spring (309) on slide bar (308) are used for promoting spacer pin (307) towards radial section (312) motion.
2. 2. A screw pump according to claim 1, characterized in that the outer ring of the stop collar (303) is fixedly connected to a fixing ring (305), said fixing ring (305) being detachably connected to the mounting cavity.

Description

Stator and screw pump Technical Field The invention belongs to the field of screw pumps, and particularly relates to a stator and a screw pump. Background Screw pumps, also known as "screw water lifts", "archimedes screw pumps". A pump for making water body rise along axial spiral shape by using the rotation of spiral blade. Consists of a shaft, a helical blade and a shell. When pumping water, the pump is placed in water in an inclined way, so that the inclination angle of the main shaft of the water pump is smaller than that of the spiral blade, and the lower end of the spiral blade is contacted with water. When the prime mover drives the screw pump shaft to rotate through the speed changing device, water enters the blades and rises along the screw type flow channel until the water flows out. Simple structure, easy manufacture, large flow, small head loss, high efficiency, convenient maintenance, low lift, low rotation speed and the need of a speed change device. The device is mainly used for irrigation, drainage and other occasions such as sewage, sludge lifting. The screw pump in the prior art comprises a stator and a rotor, wherein the rotor is difficult to install and maintain if being connected in a welding mode and the like, and the efficiency is low when the rotor is installed and disassembled in a screw mode and the like, so that the fast-assembling structure of the rotor is designed, and the fast-assembling and disassembling can be realized to realize the functions of maintenance and cleaning. And the stator housing in the prior art is generally in a cylindrical surface structure, and the uneven wall thickness of the stator housing leads to unstable dynamic balance of the rotor. Disclosure of Invention The invention aims to provide a stator and a screw pump, which solve the problems in the prior art, and the technical scheme adopted by the invention is as follows: A screw pump comprises a pump body shell, a stator shell, a main shaft, a fast-assembling rotor and a connecting mechanism; The pump body shell is internally provided with the main shaft, one end of the main shaft is connected with the driving part, the other end of the main shaft is connected with the fast-assembling rotor through the connecting mechanism, and the fast-assembling rotor is arranged in the stator shell; the connecting mechanism is used for rotating to connect the main shaft and the quick-mounting rotor. Further, the connecting mechanism comprises a connecting sleeve, a limiting ring sleeve and a fixing protrusion; the connecting sleeve is provided with an installation cavity with an opening, one end of the main shaft is inserted into the installation cavity, the outer side face of the main shaft is fixedly connected with the fixing protrusion, and the inner wall face of the connecting sleeve is connected with the limiting ring sleeve. Further, the limiting ring sleeve is provided with a notch part matched with the fixing protrusion, the fixing protrusion penetrates through the notch part and is staggered with the notch part, and the fixing protrusion abuts against the end face of the limiting ring sleeve, so that axial constraint is formed. Further, the outer ring of the limiting ring sleeve is fixedly connected with a fixing ring, and the fixing ring is detachably connected with the mounting cavity. Further, the first annular plate of lateral surface fixed connection of adapter sleeve, fixed connection second annular plate on the main shaft, be provided with the spacer pin on the second annular plate, be provided with the spacing hole on the first annular plate, the spacer pin is pegged graft in the spacing hole and form circumference limit structure. Further, the limiting hole is of an arc-shaped hole structure and comprises an arc-shaped section, a large hole section and a radial section; The two ends of the arc-shaped section are respectively provided with the macroporous section and the radial section, the inner diameter of the macroporous section is larger than the widths of the arc-shaped section and the radial section, the radial section is positioned in the radial direction of the first annular plate, and the arc-shaped section is positioned in the circumferential direction of the first annular plate; One end of the limiting pin penetrates through the limiting hole and is provided with a limiting part, the width of the limiting part is larger than the diameter of the limiting pin, the limiting pin is used for penetrating through the large hole section, and after the second annular plate rotates, the limiting part is abutted against the first annular plate; When the limiting pin is positioned on the radial section, the fixing protrusion is staggered with the notch part, and when the limiting pin is positioned on the large hole section, the fixing protrusion is positioned on the direction of the notch part. Further, a waist-shaped hole and a sliding hole are formed in the radial direction of the second annular plat