Anti-degumming stator and screw pump

Abstract

The utility model discloses an anti-degumming stator and a screw pump, and belongs to the field of screw pumps, the anti-degumming stator comprises a stator sleeve, the inner wall of the stator sleeve is provided with a spiral groove, and the spiral direction of the spiral groove is opposite to the spiral direction of a spiral cavity of the stator; glue layers are coated in the stator sleeve and the spiral groove; the motor further comprises a rubber stator which is injected into the stator sleeve to be vulcanized and then embedded into the spiral groove. According to the utility model, the stator sleeve is provided with the spiral groove, so that the vulcanized stator rubber and the stator sleeve form an embedded fastening structure, and the injection of the rubber in the early stage is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of screw pump, concretely relates to a kind of anti-coming-off stator and screw pump. BACKGROUND

[0002] Current screw pump stator in order to improve acid and alkali corrosion resistance, often set with helical cavity vulcanized stator rubber in stator pipe cover, current vulcanized stator rubber and stator pipe cover are fastened together by glue, however in certain torque greater working condition, rotor rotates in stator, will make vulcanized stator rubber and stator pipe cover come off, leading to stator failure.

[0003] Although current in order to improve the fastening degree of both, adopt screw and vulcanized stator rubber connection through stator pipe cover, however the thickness of stator pipe cover is limited, leading to screw fastening, torsional strength is limited, secondly, stator exists vibration in working process, screw is easily loose and fall off in later period, and it does not play good fastening effect.

[0004] There is also the structure of setting boss or groove on stator pipe cover, so that vulcanized stator rubber can form embedded structure with boss or groove, but the above structure can affect the injection efficiency of early-stage rubber and the fullness of injection, affect the quality of vulcanized stator rubber.

[0005] In view of the above problems, the utility model designs and manufactures a kind of anti-coming-off stator and screw pump to overcome the above-mentioned defects. UTILITY MODEL CONTENTS

[0006] For the problems existing in the prior art, the anti-coming-off stator and screw pump provided by the utility model can set a spiral groove on the stator sleeve to form an embedded fastening structure with the vulcanized stator rubber, without affecting the injection of early-stage rubber.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme: an anti-coming-off stator, comprising a stator sleeve, a spiral groove is provided on the inner wall of the stator sleeve, the spiral direction of the spiral groove is opposite to the spiral direction of the helical cavity of the stator;

[0008] The stator sleeve and the spiral groove are both coated with a glue layer;

[0009] It also includes a rubber stator, which is embedded in the spiral groove after being injected into the stator sleeve and vulcanized.

[0010] Preferably, the depth of the spiral groove is 1 / 3 to 1 / 2 of the wall thickness of the stator sleeve.

[0011] Preferably, the spiral groove extends to both ends of the stator sleeve.

[0012] Preferably, the cross section of the spiral groove is rectangular.

[0013] Preferably, a plurality of fastening screws are connected between the stator sleeve and the vulcanized rubber stator.

[0014] Preferably, the position of the fastening screw corresponds to the position of the maximum wall thickness of the rubber stator.

[0015] A screw pump comprising the anti-gluing stator.

[0016] The utility model has the advantages of:

[0017] 1. The utility model utilizes the embedded structure formed by the spiral groove and the rubber stator, can utilize the spiral groove to ensure the fastening degree of the stator sleeve and the rubber stator, and since the spiral direction of the spiral groove is opposite to the spiral direction of the spiral cavity of the stator, the torsional strength is greatly improved.

[0018] 2. Since the spiral groove extends to both ends of the stator sleeve, the rubber can be stably injected along the spiral groove when being injected, which not only does not affect the rubber injection efficiency, but also does not affect the fullness of the final injection.

[0019] 3. The fastening screw can further improve the fastening degree of the stator sleeve and the rubber stator, and the position of the fastening screw can ensure the connection size of the fastening screw and the rubber stator, thereby reducing the influence of the vibration of the screw pump on the loosening of the fastening screw. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is a sectional view of an anti-gluing stator.

[0021] Fig. 2 It is a partial schematic view of the spiral groove of the utility model.

[0022] Fig. 3 It is a partial schematic view of the fastening screw of the utility model.

[0023] In the drawing: 1-stator sleeve, 2-rubber stator, 3-spiral cavity, 4-spiral groove, 5-fastening screw. DETAILED DESCRIPTION

[0024] In order to facilitate those skilled in the art to understand, the utility model will be further described below in combination with the drawings.

[0025] As Figs. 1 to 3As shown, the anti-gluing stator comprises a stator sleeve 1, a helical groove 4 is arranged on the inner wall of the stator sleeve 1, the helical direction of the helical groove 4 is opposite to the helical direction of the helical cavity 3 of the stator, the stator sleeve 1 and the helical groove 4 are coated with a glue layer, and the anti-gluing stator further comprises a rubber stator 2, which is embedded in the helical groove 4 after being injected into the stator sleeve 1 and vulcanized.

[0026] The embedded structure formed by the helical groove 4 and the rubber stator 2 can ensure the fastening degree of the stator sleeve and the rubber stator 2 by the helical groove 4, and the torsional strength is greatly improved due to the opposite helical directions of the helical groove 4 and the helical cavity 3 of the stator.

[0027] The depth of the helical groove 4 is preferably 1 / 3-1 / 2 of the wall thickness of the stator sleeve 1, so as to ensure the embedding depth of the rubber stator 2 and reduce the influence on the structural strength of the stator sleeve 1.

[0028] The helical groove 4 extends to both ends of the stator sleeve 1, and the cross section of the helical groove 4 is preferably rectangular, so that the rubber can be stably injected along the helical groove 4, which does not affect the rubber injection efficiency and also does not affect the fullness of the final injection.

[0029] The stator sleeve 1 and the vulcanized rubber stator 2 are connected by a plurality of fastening screws 5, specifically, a threaded hole is arranged on the rubber stator 2, a connecting hole is arranged on the stator sleeve 1, and the position of the fastening screw 5 is preferably corresponding to the maximum wall thickness position of the rubber stator 2, which is to further improve the fastening degree of the stator sleeve and the rubber stator 2 by the fastening screw 5, and the position of the fastening screw 5 can ensure the connection size of the fastening screw 5 and the rubber stator 2, thereby reducing the influence of the screw pump vibration on the loosening of the fastening screw 5.

[0030] The utility model also provides a screw pump which comprises the anti-gluing stator.

[0031] It should be understood that the use of these embodiments is only for the purpose of illustrating the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all these equivalent forms also fall within the protection scope defined by the appended claims of the present application.

Claims

1. A demolding stator, characterized by, The application relates to a stator sleeve (1) provided with a spiral groove (4) on the inner wall of the stator sleeve (1), wherein the spiral direction of the spiral groove (4) is opposite to the spiral direction of a spiral cavity (3) of the stator. The stator sleeve (1) and the spiral groove (4) are both coated with a glue layer. The application further relates to a rubber stator (2) which is embedded in the spiral groove (4) after being injected into the stator sleeve (1) and vulcanized.

2. A non-stick stator according to claim 1, wherein The depth of the spiral groove (4) is 1 / 3-1 / 2 of the wall thickness of the stator sleeve (1).

3. A non-stick stator according to claim 1, wherein The spiral groove (4) extends to both ends of the stator sleeve (1).

4. A non-stick stator according to claim 1, wherein The cross section of the spiral groove (4) is rectangular.

5. A non-stick stator according to claim 1, wherein A plurality of fastening screws (5) are arranged between the stator sleeve (1) and the vulcanized rubber stator (2).

6. A non-slip stator according to claim 5, wherein, The fastening screws (5) are arranged at the positions corresponding to the positions of the maximum wall thickness of the rubber stator (2).

7. A screw pump, characterized by The application further relates to a stator provided with the anti-gluing stator sleeve.

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