CN211692802U - Detachable screw pump stator and screw pump - Google Patents

Abstract

The utility model discloses a removable screw pump stator, include: the inner wall of the stator shell is provided with a plurality of positioning grooves, and at least one end of each positioning groove extends to the end face of the stator shell; the rubber bushing with the spiral hole is provided with a plurality of positioning edges on the outer peripheral surface of the rubber bushing, the number of the positioning edges is consistent with that of the positioning grooves, the positioning grooves are matched with the positioning edges for use, and the rubber bushing is detachably connected to the inner wall of the stator shell. Compared with the prior art, the utility model provides a rubber bush can carry out releasable connection with stator housing, and when convenience of customers changed rubber bush, stator housing's life can also be prolonged, has effectively reduced screw pump stator's maintenance cost.

Description

Detachable screw pump stator and screw pump

Technical Field

The utility model relates to a screw pump technical field, in particular to removable screw pump stator and screw pump.

Background

As shown in fig. 1, the stator structure of the existing single-screw pump is provided, wherein the stator housing 1 'is a steel tube, and the inside of the stator housing is fixedly connected with a rubber bushing 2' with a spiral hole, and the rubber bushing is matched with a rotor of the screw pump for use, so that fluid can be gradually extruded from a feed inlet of the screw pump to a discharge outlet of the screw pump.

In the prior art, the rotor is generally protected by consuming a rubber bushing, so the rubber bushing belongs to a consumable material and needs to be replaced periodically. However, because the existing rubber bushings are fixedly connected in the stator housing, when a user needs to replace the rubber bushings, the rubber bushings are frequently required to be disassembled, and the inner wall of the stator housing is often damaged in the disassembling process, so that the rubber bushings also need to be replaced after being used for a period of time. In summary, the screw pump stator with the existing structure is inconvenient for later maintenance, and the maintenance process is time-consuming and labor-consuming.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a removable screw pump stator can convenience of customers change rubber bush.

The utility model also provides a screw pump of having above-mentioned removable screw pump stator.

According to the utility model discloses a removable screw pump stator of first aspect embodiment, include:

the inner wall of the stator shell is provided with a plurality of positioning grooves, and at least one end of each positioning groove extends to the end face of the stator shell;

the rubber bushing with the spiral hole is provided with a plurality of positioning edges on the outer peripheral surface of the rubber bushing, the number of the positioning edges is consistent with that of the positioning grooves, the positioning grooves are matched with the positioning edges for use, and the rubber bushing is detachably connected to the inner wall of the stator shell.

According to the utility model discloses removable screw pump stator has following beneficial effect at least: compared with the prior art, the utility model provides a rubber bush can carry out releasable connection with stator housing, and when convenience of customers changed rubber bush, stator housing's life can also be prolonged, has effectively reduced screw pump stator's maintenance cost.

According to some embodiments of the invention, the stator housing is annular in shape.

According to some embodiments of the utility model, the shaft shoulder has all been seted up at the both ends of stator shell.

According to some embodiments of the invention, the number of positioning grooves is two.

According to some embodiments of the invention, the stator housing is made of metal.

According to the utility model discloses a some embodiments, rubber bush's one end is equipped with the turn-ups, the turn-ups joint is on stator case's terminal surface.

According to the utility model discloses a screw pump of second aspect embodiment, including outlet flange, by motor drive's rotor and foretell detachable screw pump stator, the rotor matches with the rubber bush and uses, the motor with flange connection; the outlet flange is clamped on one shaft shoulder of the stator shell, the connecting flange is clamped on the other shaft shoulder of the stator shell, and the rubber bushing is limited between the outlet flange and the connecting flange.

According to some embodiments of the utility model, the screw pump still includes connecting screw and coupling nut, through connecting screw with coupling nut's cooperation is used, the outlet flange with coupling flange installs respectively stator housing's both ends.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a cross-sectional view of a prior art stator;

fig. 2 is a schematic perspective view of a detachable screw pump stator according to an embodiment of the present invention;

FIG. 3 is a right side view of the removable screw pump stator of FIG. 2;

FIG. 4 is an exploded view of a removable screw pump stator according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of the removable screw pump stator of FIG. 3 taken along section line A-A;

fig. 6 is a schematic perspective view of a screw pump according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of the removable screw pump stator of FIG. 6 taken along section line B-B.

In the drawings: 100-stator shell, 200-rubber bushing, 210-spiral hole, 300-rotor, 110-positioning groove, 220-positioning edge, 120-shaft shoulder, 400-outlet flange, 500-connecting flange, 600-motor, 610-middle flexible shaft, 700-connecting screw, 710-connecting nut, 410-discharge hole, 510-feeding hole and 800-backing plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

As shown in fig. 2 to 5, the detachable screw pump stator according to the embodiment of the first aspect of the present invention includes a stator housing 100 and a rubber bushing 200, the stator housing 100 is in the shape of a circular ring, and the stator housing 100 is made of metal, preferably steel; the rubber bushing 200 is preferably made of vulcanized rubber, and the inner cavity of the rubber bushing 200 is a spiral hole 210. Two positioning grooves 110 are formed in the inner wall of the stator housing 100, and two ends of each positioning groove 110 extend to the end surface of the stator housing 100, so that the positioning grooves 110 are through grooves; two positioning ribs 220 are arranged on the outer peripheral surface of the rubber bushing 200, and the rubber bushing 200 is detachably connected to the inner wall of the stator housing 100 through matching of the positioning groove 110 and the positioning ribs 220. It is understood that the number of the positioning ribs 220 is the same as the number of the positioning grooves 110, and the number of the positioning grooves 110 may also be one, three, etc., without being limited thereto; besides, as long as one end of the positioning groove 110 extends to the end surface of the stator housing 100, that is, the positioning groove 110 is a semi-through groove, the rubber bushing 200 can be detachably connected in the stator housing 100 from outside to inside, the present invention does not limit the specific structure of the positioning groove 110, and the positioning groove 110 can be a through groove or a semi-through groove.

Compared with the prior art, the rubber bushing 200 in the present invention can be detachably connected with the stator housing 100, and under the positioning action of the positioning ridge 220 and the positioning groove 110, the rubber bushing 200 will not deflect on the inner wall of the stator housing 100 during operation, thereby ensuring the normal use of the detachable screw pump stator; when the rubber bushing 200 needs to be replaced, a user only needs to take out the lost rubber bushing 200 from inside to outside and then place a new rubber bushing 200 from outside to inside, so that the rubber bushing 200 can be replaced, the user can replace the rubber bushing 200 conveniently, the service life of the stator shell 100 can be prolonged, the stator shell 100 can be reused, and the maintenance cost of the detachable screw pump stator is effectively reduced.

In some embodiments of the present invention, for the convenience of positioning and installing the stator housing 100, the shaft shoulders 120 are disposed at both ends of the stator housing 100.

In some embodiments of the present invention, in order to axially position the rubber bushing 200, one end of the rubber bushing 200 is provided with a flange (not shown in the drawings), and the flange is connected to the end surface of the stator housing 100.

As shown in fig. 6 and 7, a screw pump according to an embodiment of the second aspect of the present invention includes the detachable screw pump stator according to an embodiment of the present invention, further including an outlet flange 400, a connecting flange 500 and a rotor 300 driven by a motor 600, the motor 600 is connected to the connecting flange 500, the rotor 300 is provided with a middle flexible shaft 610 between the motor 600, the middle flexible shaft 610 is located in the connecting flange 500, and the driving force of the motor 600 is transmitted to the rotor 300 through the middle flexible shaft 610. The outlet flange 400 is clamped on one shaft shoulder 120 of the stator housing 100, the connecting flange 500 is clamped on the other shaft shoulder 120 of the stator housing 100, and because the inner diameters of the outlet flange 400 and the connecting flange 500 are smaller than the distance from the positioning rib 220 to the central shaft of the stator housing 100, the rubber bushing 200 is limited between the outlet flange 400 and the connecting flange 500, and the rubber bushing 200 is prevented from axial displacement. It should be further noted that, in this embodiment, since the rubber bushing 200 is limited between the outlet flange 400 and the connecting flange 500, the rubber bushing 200 in this embodiment does not need to be provided with a flange.

In order to enable the detachable screw pump stator to be installed between the outlet flange 400 and the connecting flange 500, the screw pump further comprises a connecting screw 700 and a connecting nut 710, the connecting screw 700 is used with the connecting nut 710 in a matched mode, the distance between the outlet flange 400 and the connecting flange 500 is gradually narrowed until the distance between the outlet flange 400 and the connecting flange 500 is completely abutted to the two ends of the stator housing 100, and at the moment, the outlet flange 400 and the connecting flange 500 are installed at the two ends of the stator housing 100 respectively. In addition, the outlet flange 400 is provided with a discharge port 410, the connecting flange 500 is provided with a feed port 510, and the rotor 300 is matched with the rubber bushing 200 for use, so that fluid can be gradually extruded to the discharge port 410 of the screw pump from the feed port 510 of the screw pump.

As shown in fig. 6, in some embodiments of the present invention, a pad plate 800 is connected to the outlet flange 400 and the connecting flange 500, and the pad plate 800 is used to raise the screw pump and reduce the vibration frequency of the screw pump to the installation surface.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (8)

1. Removable screw pump stator, its characterized in that includes:

the stator comprises a stator shell (100), wherein the inner wall of the stator shell is provided with a plurality of positioning grooves (110), and at least one end of each positioning groove (110) extends to the end face of the stator shell (100);

the rubber bushing (200) is provided with a spiral hole (210), a plurality of positioning ribs (220) are arranged on the outer peripheral surface of the rubber bushing (200), the number of the positioning ribs (220) is consistent with that of the positioning grooves (110), and the rubber bushing (200) is detachably connected to the inner wall of the stator shell (100) through matching use of the positioning grooves (110) and the positioning ribs (220).

2. The removable screw pump stator of claim 1, wherein: the stator housing (100) is annular in shape.

3. The removable screw pump stator of claim 2, wherein: both ends of the stator shell (100) are provided with shaft shoulders (120).

4. The removable screw pump stator of claim 1, wherein: the number of the positioning grooves (110) is two.

5. The removable screw pump stator of claim 1, wherein: the stator housing (100) is made of metal.

6. The removable screw pump stator of claim 1, wherein: one end of the rubber bushing (200) is provided with a flanging, and the flanging is clamped on the end face of the stator shell (100).

7. A progressive cavity pump, comprising a removable progressive cavity pump stator according to any of claims 1 to 5, further comprising: an outlet flange (400), a connecting flange (500) and a rotor (300) driven by a motor (600), wherein the rotor (300) is matched with the rubber bushing (200) for use, and the motor (600) is connected with the connecting flange (500); the outlet flange (400) is clamped on one shaft shoulder (120) of the stator housing (100), the connecting flange (500) is clamped on the other shaft shoulder (120) of the stator housing (100), and the rubber bushing (200) is limited between the outlet flange (400) and the connecting flange (500).

8. A screw pump according to claim 7, wherein: the stator comprises a stator shell (100), and is characterized by further comprising a connecting screw rod (700) and a connecting nut (710), wherein the connecting screw rod (700) is matched with the connecting nut (710) for use, and the outlet flange (400) and the connecting flange (500) are respectively installed at two ends of the stator shell (100).

Images